summarylogtreecommitdiffstats
path: root/util-linux-2.29.2.diff
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If this patch does not apply cleanly to newer version of util-linux, try
replacing original sys-utils/losetup.8 with version from util-linux that the
patch is for. And then apply this patch.

To compile this software, you need recent versions of autohell tools
(autopoint aclocal autoconf autoheader automake libtoolize).

Loop device setup and tear down bits are in included libmount library. This
patch does not break libmount ABI or version numbering. This version of
libmount library can be installed as system library. mount, umount, swapon,
and swapoff programs require libmount library. losetup does not require
libmount library. If you are uncomfortable replacing system libraries (due
to library version dependency problems that it may cause), you can compile
and link supplied programs so that included libraries are statically linked
to programs, like this:

    ./autogen.sh
    CFLAGS="-O2 -Wall" ./configure --disable-shared --enable-static --disable-pylibmount --enable-libmount-support-mtab
    make


diff -urN util-linux-2.29.2/include/Makemodule.am util-linux-2.29.2-AES/include/Makemodule.am
--- util-linux-2.29.2/include/Makemodule.am	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/include/Makemodule.am	2017-03-10 17:02:59.000000000 +0200
@@ -38,6 +38,7 @@
 	include/procutils.h \
 	include/pt-bsd.h \
 	include/pt-mbr.h \
+	include/xgetpass.h \
 	include/pt-mbr-partnames.h \
 	include/pt-sgi.h \
 	include/pt-sun.h \
diff -urN util-linux-2.29.2/include/xgetpass.h util-linux-2.29.2-AES/include/xgetpass.h
--- util-linux-2.29.2/include/xgetpass.h	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/include/xgetpass.h	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,6 @@
+#ifndef UTIL_LINUX_XGETPASS_H
+#define UTIL_LINUX_XGETPASS_H
+
+extern char *xgetpass(int pfd, const char *prompt);
+
+#endif /* UTIL_LINUX_XGETPASS_H */
diff -urN util-linux-2.29.2/lib/Makemodule.am util-linux-2.29.2-AES/lib/Makemodule.am
--- util-linux-2.29.2/lib/Makemodule.am	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/lib/Makemodule.am	2017-03-10 17:02:59.000000000 +0200
@@ -21,6 +21,7 @@
 	lib/strutils.c \
 	lib/timeutils.c \
 	lib/ttyutils.c \
+	lib/xgetpass.c \
 	lib/exec_shell.c \
 	lib/strv.c
 
diff -urN util-linux-2.29.2/lib/xgetpass.c util-linux-2.29.2-AES/lib/xgetpass.c
--- util-linux-2.29.2/lib/xgetpass.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/lib/xgetpass.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,64 @@
+/*
+ * A function to read the passphrase either from the terminal or from
+ * an open file descriptor.
+ *
+ * Public domain.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include "c.h"
+#include "xgetpass.h"
+
+char *xgetpass(int pfd, const char *prompt)
+{
+	char *p = NULL, *n;
+	int x = 0, y = 0;
+
+        if (pfd < 0) {
+		/* read from terminal */
+		p = getpass(prompt);
+		if(!p) return NULL;
+		/* caller insists on free()ing this pointer, so make sure it is such */
+		n = strdup(p);
+		y = strlen(p);
+		if(y) memset(p, 0, y); /* erase original */
+		/* return a free()able copy, or 0 if strdup() failed */
+		return n;
+	}
+
+	do {
+		if(y >= (x - 1)) {
+			x += 128;
+			/* Must enforce some max limit here -- this code   */
+			/* runs as part of mount, and mount is setuid root */
+			/* and has used mlockall(MCL_CURRENT | MCL_FUTURE) */
+			if(x > (4*1024)) {
+				error_out:
+				if(p) {
+					memset(p, 0, y);
+					free(p);
+				}
+				return NULL;
+			}
+			n = malloc(x);
+			if(!n) goto error_out;
+			if(p) {
+				memcpy(n, p, y);
+				memset(p, 0, y);
+				free(p);
+			}
+			p = n;
+		}
+		if(read(pfd, p + y, 1) != 1) break;
+		if((p[y] == '\n') || !p[y]) break;
+		y++;
+	} while(1);
+	if(p) p[y] = 0;
+	return p;
+}
diff -urN util-linux-2.29.2/libmount/src/Makemodule.am util-linux-2.29.2-AES/libmount/src/Makemodule.am
--- util-linux-2.29.2/libmount/src/Makemodule.am	2016-11-02 14:57:31.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/Makemodule.am	2017-03-10 17:02:59.000000000 +0200
@@ -28,7 +28,10 @@
 if LINUX
 libmount_la_SOURCES += \
 	libmount/src/context.c \
-	libmount/src/context_loopdev.c \
+	libmount/src/context_loopdev1.c \
+	libmount/src/sha512.c \
+	libmount/src/rmd160.c \
+	libmount/src/aes.c \
 	libmount/src/context_mount.c \
 	libmount/src/context_umount.c \
 	libmount/src/monitor.c
diff -urN util-linux-2.29.2/libmount/src/aes.c util-linux-2.29.2-AES/libmount/src/aes.c
--- util-linux-2.29.2/libmount/src/aes.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/aes.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,299 @@
+// I retain copyright in this code but I encourage its free use provided
+// that I don't carry any responsibility for the results. I am especially 
+// happy to see it used in free and open source software. If you do use 
+// it I would appreciate an acknowledgement of its origin in the code or
+// the product that results and I would also appreciate knowing a little
+// about the use to which it is being put. I am grateful to Frank Yellin
+// for some ideas that are used in this implementation.
+//
+// Dr B. R. Gladman <brg@gladman.uk.net> 6th April 2001.
+//
+// This is an implementation of the AES encryption algorithm (Rijndael)
+// designed by Joan Daemen and Vincent Rijmen. This version is designed
+// to provide both fixed and dynamic block and key lengths and can also 
+// run with either big or little endian internal byte order (see aes.h). 
+// It inputs block and key lengths in bytes with the legal values being 
+// 16, 24 and 32.
+
+/*
+ * Modified by Jari Ruusu,  May 1 2001
+ *  - Fixed some compile warnings, code was ok but gcc warned anyway.
+ *  - Changed basic types: byte -> unsigned char, word -> u_int32_t
+ *  - Major name space cleanup: Names visible to outside now begin
+ *    with "aes_" or "AES_". A lot of stuff moved from aes.h to aes.c
+ *  - Removed C++ and DLL support as part of name space cleanup.
+ *  - Eliminated unnecessary recomputation of tables. (actual bug fix)
+ *  - Merged precomputed constant tables to aes.c file.
+ *  - Removed data alignment restrictions for portability reasons.
+ *  - Made block and key lengths accept bit count (128/192/256)
+ *    as well byte count (16/24/32).
+ *  - Removed all error checks. This change also eliminated the need
+ *    to preinitialize the context struct to zero.
+ *  - Removed some totally unused constants.
+ */
+
+/*
+ * Modified by Jari Ruusu,  June 9 2003
+ *  - Removed all code not necessary for small size
+ *    optimized encryption using 256 bit keys.
+ */
+
+#include "aes.h"
+
+#if AES_BLOCK_SIZE != 16
+#error an illegal block size has been specified
+#endif  
+
+// upr(x,n): rotates bytes within words by n positions, moving bytes 
+// to higher index positions with wrap around into low positions
+// bval(x,n): extracts a byte from a word
+
+#define upr(x,n)        (((x) << 8 * (n)) | ((x) >> (32 - 8 * (n))))
+#define bval(x,n)       ((unsigned char)((x) >> 8 * (n)))
+#define bytes2word(b0, b1, b2, b3)  \
+        ((u_int32_t)(b3) << 24 | (u_int32_t)(b2) << 16 | (u_int32_t)(b1) << 8 | (b0))
+
+#if defined(i386) || defined(_I386) || defined(__i386__) || defined(__i386)
+/* little endian processor without data alignment restrictions */
+#define word_in(x)      *(u_int32_t*)(x)
+#define word_out(x,v)   *(u_int32_t*)(x) = (v)
+#else
+/* slower but generic big endian or with data alignment restrictions */
+#define word_in(x)      ((u_int32_t)(((unsigned char *)(x))[0])|((u_int32_t)(((unsigned char *)(x))[1])<<8)|((u_int32_t)(((unsigned char *)(x))[2])<<16)|((u_int32_t)(((unsigned char *)(x))[3])<<24))
+#define word_out(x,v)   ((unsigned char *)(x))[0]=(v),((unsigned char *)(x))[1]=((v)>>8),((unsigned char *)(x))[2]=((v)>>16),((unsigned char *)(x))[3]=((v)>>24)
+#endif
+
+// the finite field modular polynomial and elements
+
+#define ff_poly 0x011b
+#define ff_hi   0x80
+
+static int tab_gen = 0;
+static unsigned char  s_box[256];            // the S box
+static u_int32_t  rcon_tab[AES_RC_LENGTH];   // table of round constants
+static u_int32_t  ft_tab[4][256];
+static u_int32_t  fl_tab[4][256];
+
+// Generate the tables for the dynamic table option
+
+// It will generally be sensible to use tables to compute finite 
+// field multiplies and inverses but where memory is scarse this 
+// code might sometimes be better.
+
+// return 2 ^ (n - 1) where n is the bit number of the highest bit
+// set in x with x in the range 1 < x < 0x00000200.   This form is
+// used so that locals within FFinv can be bytes rather than words
+
+static unsigned char hibit(const u_int32_t x)
+{   unsigned char r = (unsigned char)((x >> 1) | (x >> 2));
+    
+    r |= (r >> 2);
+    r |= (r >> 4);
+    return (r + 1) >> 1;
+}
+
+// return the inverse of the finite field element x
+
+static unsigned char FFinv(const unsigned char x)
+{   unsigned char    p1 = x, p2 = 0x1b, n1 = hibit(x), n2 = 0x80, v1 = 1, v2 = 0;
+
+    if(x < 2) return x;
+
+    for(;;)
+    {
+        if(!n1) return v1;
+
+        while(n2 >= n1)
+        {   
+            n2 /= n1; p2 ^= p1 * n2; v2 ^= v1 * n2; n2 = hibit(p2);
+        }
+        
+        if(!n2) return v2;
+
+        while(n1 >= n2)
+        {   
+            n1 /= n2; p1 ^= p2 * n1; v1 ^= v2 * n1; n1 = hibit(p1);
+        }
+    }
+}
+
+// define the finite field multiplies required for Rijndael
+
+#define FFmul02(x)  ((((x) & 0x7f) << 1) ^ ((x) & 0x80 ? 0x1b : 0))
+#define FFmul03(x)  ((x) ^ FFmul02(x))
+
+// The forward and inverse affine transformations used in the S-box
+
+#define fwd_affine(x) \
+    (w = (u_int32_t)x, w ^= (w<<1)^(w<<2)^(w<<3)^(w<<4), 0x63^(unsigned char)(w^(w>>8)))
+
+static void gen_tabs(void)
+{   u_int32_t  i, w;
+
+    for(i = 0, w = 1; i < AES_RC_LENGTH; ++i)
+    {
+        rcon_tab[i] = bytes2word(w, 0, 0, 0);
+        w = (w << 1) ^ (w & ff_hi ? ff_poly : 0);
+    }
+
+    for(i = 0; i < 256; ++i)
+    {   unsigned char    b;
+
+        s_box[i] = b = fwd_affine(FFinv((unsigned char)i));
+
+        w = bytes2word(b, 0, 0, 0);
+        fl_tab[0][i] = w;
+        fl_tab[1][i] = upr(w,1);
+        fl_tab[2][i] = upr(w,2);
+        fl_tab[3][i] = upr(w,3);
+        w = bytes2word(FFmul02(b), b, b, FFmul03(b));
+        ft_tab[0][i] = w;
+        ft_tab[1][i] = upr(w,1);
+        ft_tab[2][i] = upr(w,2);
+        ft_tab[3][i] = upr(w,3);
+    }
+}
+
+#define four_tables(x,tab,vf,rf,c) \
+ (  tab[0][bval(vf(x,0,c),rf(0,c))] \
+  ^ tab[1][bval(vf(x,1,c),rf(1,c))] \
+  ^ tab[2][bval(vf(x,2,c),rf(2,c))] \
+  ^ tab[3][bval(vf(x,3,c),rf(3,c))])
+
+#define vf1(x,r,c)  (x)
+#define rf1(r,c)    (r)
+#define rf2(r,c)    ((r-c)&3)
+
+#define ls_box(x,c)     four_tables(x,fl_tab,vf1,rf2,c)
+
+#define nc   (AES_BLOCK_SIZE / 4)
+
+// Initialise the key schedule from the user supplied key.
+// The key length is now specified in bytes, 32.
+// This corresponds to bit length of 256 bits, and
+// to Nk value of 8 respectively.
+
+void __loDev_aes_set_key(aes_context *cx, const unsigned char in_key[], int n_bytes, const int f)
+{   u_int32_t    *kf, *kt, rci;
+
+    if(!tab_gen) { gen_tabs(); tab_gen = 1; }
+
+    cx->aes_Nkey = 8;
+    cx->aes_Nrnd = (cx->aes_Nkey > nc ? cx->aes_Nkey : nc) + 6; 
+
+    cx->aes_e_key[0] = word_in(in_key     );
+    cx->aes_e_key[1] = word_in(in_key +  4);
+    cx->aes_e_key[2] = word_in(in_key +  8);
+    cx->aes_e_key[3] = word_in(in_key + 12);
+
+    kf = cx->aes_e_key; 
+    kt = kf + nc * (cx->aes_Nrnd + 1) - cx->aes_Nkey; 
+    rci = 0;
+
+    switch(cx->aes_Nkey)
+    {
+    case 8: cx->aes_e_key[4] = word_in(in_key + 16);
+            cx->aes_e_key[5] = word_in(in_key + 20);
+            cx->aes_e_key[6] = word_in(in_key + 24);
+            cx->aes_e_key[7] = word_in(in_key + 28);
+            do
+            {   kf[ 8] = kf[0] ^ ls_box(kf[7],3) ^ rcon_tab[rci++];
+                kf[ 9] = kf[1] ^ kf[ 8];
+                kf[10] = kf[2] ^ kf[ 9];
+                kf[11] = kf[3] ^ kf[10];
+                kf[12] = kf[4] ^ ls_box(kf[11],0);
+                kf[13] = kf[5] ^ kf[12];
+                kf[14] = kf[6] ^ kf[13];
+                kf[15] = kf[7] ^ kf[14];
+                kf += 8;
+            }
+            while (kf < kt);
+            break;
+    }
+}
+
+// y = output word, x = input word, r = row, c = column
+// for r = 0, 1, 2 and 3 = column accessed for row r
+
+#define s(x,c) x[c]
+
+// I am grateful to Frank Yellin for the following constructions
+// which, given the column (c) of the output state variable that
+// is being computed, return the input state variables which are
+// needed for each row (r) of the state
+
+// For the fixed block size options, compilers reduce these two 
+// expressions to fixed variable references. For variable block 
+// size code conditional clauses will sometimes be returned
+
+#define fwd_var(x,r,c) \
+ ( r==0 ?			\
+    ( c==0 ? s(x,0) \
+    : c==1 ? s(x,1) \
+    : c==2 ? s(x,2) \
+    : c==3 ? s(x,3) \
+    : c==4 ? s(x,4) \
+    : c==5 ? s(x,5) \
+    : c==6 ? s(x,6) \
+    : s(x,7))		\
+ : r==1 ?			\
+    ( c==0 ? s(x,1) \
+    : c==1 ? s(x,2) \
+    : c==2 ? s(x,3) \
+    : c==3 ? nc==4 ? s(x,0) : s(x,4) \
+    : c==4 ? s(x,5) \
+    : c==5 ? nc==8 ? s(x,6) : s(x,0) \
+    : c==6 ? s(x,7) \
+    : s(x,0))		\
+ : r==2 ?			\
+    ( c==0 ? nc==8 ? s(x,3) : s(x,2) \
+    : c==1 ? nc==8 ? s(x,4) : s(x,3) \
+    : c==2 ? nc==4 ? s(x,0) : nc==8 ? s(x,5) : s(x,4) \
+    : c==3 ? nc==4 ? s(x,1) : nc==8 ? s(x,6) : s(x,5) \
+    : c==4 ? nc==8 ? s(x,7) : s(x,0) \
+    : c==5 ? nc==8 ? s(x,0) : s(x,1) \
+    : c==6 ? s(x,1) \
+    : s(x,2))		\
+ :					\
+    ( c==0 ? nc==8 ? s(x,4) : s(x,3) \
+    : c==1 ? nc==4 ? s(x,0) : nc==8 ? s(x,5) : s(x,4) \
+    : c==2 ? nc==4 ? s(x,1) : nc==8 ? s(x,6) : s(x,5) \
+    : c==3 ? nc==4 ? s(x,2) : nc==8 ? s(x,7) : s(x,0) \
+    : c==4 ? nc==8 ? s(x,0) : s(x,1) \
+    : c==5 ? nc==8 ? s(x,1) : s(x,2) \
+    : c==6 ? s(x,2) \
+    : s(x,3)))
+
+#define si(y,x,k,c) s(y,c) = word_in(x + 4 * c) ^ k[c]
+#define so(y,x,c)   word_out(y + 4 * c, s(x,c))
+
+#define fwd_rnd(y,x,k,c)    s(y,c)= (k)[c] ^ four_tables(x,ft_tab,fwd_var,rf1,c)
+#define fwd_lrnd(y,x,k,c)   s(y,c)= (k)[c] ^ four_tables(x,fl_tab,fwd_var,rf1,c)
+
+#define locals(y,x)     x[4],y[4]
+
+#define l_copy(y, x)    s(y,0) = s(x,0); s(y,1) = s(x,1); \
+                        s(y,2) = s(x,2); s(y,3) = s(x,3);
+#define state_in(y,x,k) si(y,x,k,0); si(y,x,k,1); si(y,x,k,2); si(y,x,k,3)
+#define state_out(y,x)  so(y,x,0); so(y,x,1); so(y,x,2); so(y,x,3)
+#define round(rm,y,x,k) rm(y,x,k,0); rm(y,x,k,1); rm(y,x,k,2); rm(y,x,k,3)
+
+void __loDev_aes_encrypt(const aes_context *cx, const unsigned char in_blk[], unsigned char out_blk[])
+{   u_int32_t        locals(b0, b1);
+    const u_int32_t  *kp = cx->aes_e_key;
+
+    state_in(b0, in_blk, kp); kp += nc;
+
+    {   u_int32_t    rnd;
+
+        for(rnd = 0; rnd < cx->aes_Nrnd - 1; ++rnd)
+        {
+            round(fwd_rnd, b1, b0, kp); 
+            l_copy(b0, b1); kp += nc;
+        }
+
+        round(fwd_lrnd, b0, b1, kp);
+    }
+
+    state_out(out_blk, b0);
+}
diff -urN util-linux-2.29.2/libmount/src/aes.h util-linux-2.29.2-AES/libmount/src/aes.h
--- util-linux-2.29.2/libmount/src/aes.h	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/aes.h	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,97 @@
+// I retain copyright in this code but I encourage its free use provided
+// that I don't carry any responsibility for the results. I am especially 
+// happy to see it used in free and open source software. If you do use 
+// it I would appreciate an acknowledgement of its origin in the code or
+// the product that results and I would also appreciate knowing a little
+// about the use to which it is being put. I am grateful to Frank Yellin
+// for some ideas that are used in this implementation.
+//
+// Dr B. R. Gladman <brg@gladman.uk.net> 6th April 2001.
+//
+// This is an implementation of the AES encryption algorithm (Rijndael)
+// designed by Joan Daemen and Vincent Rijmen. This version is designed
+// to provide both fixed and dynamic block and key lengths and can also 
+// run with either big or little endian internal byte order (see aes.h). 
+// It inputs block and key lengths in bytes with the legal values being 
+// 16, 24 and 32.
+
+/*
+ * Modified by Jari Ruusu,  May 1 2001
+ *  - Fixed some compile warnings, code was ok but gcc warned anyway.
+ *  - Changed basic types: byte -> unsigned char, word -> u_int32_t
+ *  - Major name space cleanup: Names visible to outside now begin
+ *    with "aes_" or "AES_". A lot of stuff moved from aes.h to aes.c
+ *  - Removed C++ and DLL support as part of name space cleanup.
+ *  - Eliminated unnecessary recomputation of tables. (actual bug fix)
+ *  - Merged precomputed constant tables to aes.c file.
+ *  - Removed data alignment restrictions for portability reasons.
+ *  - Made block and key lengths accept bit count (128/192/256)
+ *    as well byte count (16/24/32).
+ *  - Removed all error checks. This change also eliminated the need
+ *    to preinitialize the context struct to zero.
+ *  - Removed some totally unused constants.
+ */
+
+#ifndef _AES_H
+#define _AES_H
+
+#if defined(__linux__) && defined(__KERNEL__)
+#  include <linux/types.h>
+#else 
+#  include <sys/types.h>
+#endif
+
+// CONFIGURATION OPTIONS (see also aes.c)
+//
+// Define AES_BLOCK_SIZE to set the cipher block size (16, 24 or 32) or
+// leave this undefined for dynamically variable block size (this will
+// result in much slower code).
+// IMPORTANT NOTE: AES_BLOCK_SIZE is in BYTES (16, 24, 32 or undefined). If
+// left undefined a slower version providing variable block length is compiled
+
+#define AES_BLOCK_SIZE  16
+
+// The number of key schedule words for different block and key lengths
+// allowing for method of computation which requires the length to be a
+// multiple of the key length
+//
+// Nk =       4   6   8
+//        -------------
+// Nb = 4 |  60  60  64
+//      6 |  96  90  96
+//      8 | 120 120 120
+
+#if !defined(AES_BLOCK_SIZE) || (AES_BLOCK_SIZE == 32)
+#define AES_KS_LENGTH   120
+#define AES_RC_LENGTH    29
+#else
+#define AES_KS_LENGTH   4 * AES_BLOCK_SIZE
+#define AES_RC_LENGTH   (9 * AES_BLOCK_SIZE) / 8 - 8
+#endif
+
+typedef struct
+{
+    u_int32_t    aes_Nkey;      // the number of words in the key input block
+    u_int32_t    aes_Nrnd;      // the number of cipher rounds
+    u_int32_t    aes_e_key[AES_KS_LENGTH];   // the encryption key schedule
+    u_int32_t    aes_d_key[AES_KS_LENGTH];   // the decryption key schedule
+#if !defined(AES_BLOCK_SIZE)
+    u_int32_t    aes_Ncol;      // the number of columns in the cipher state
+#endif
+} aes_context;
+
+// THE CIPHER INTERFACE
+
+#if !defined(AES_BLOCK_SIZE)
+extern void aes_set_blk(aes_context *, const int);
+#endif
+extern void __loDev_aes_set_key(aes_context *, const unsigned char [], const int, const int);
+extern void __loDev_aes_encrypt(const aes_context *, const unsigned char [], unsigned char []);
+extern void __loDev_aes_decrypt(const aes_context *, const unsigned char [], unsigned char []);
+
+// The block length inputs to aes_set_block and aes_set_key are in numbers
+// of bytes or bits.  The calls to subroutines must be made in the above
+// order but multiple calls can be made without repeating earlier calls
+// if their parameters have not changed.
+
+#endif  // _AES_H
diff -urN util-linux-2.29.2/libmount/src/context.c util-linux-2.29.2-AES/libmount/src/context.c
--- util-linux-2.29.2/libmount/src/context.c	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/context.c	2017-03-10 17:02:59.000000000 +0200
@@ -88,7 +88,6 @@
 	mnt_unref_table(cxt->fstab);
 	mnt_unref_cache(cxt->cache);
 
-	mnt_context_clear_loopdev(cxt);
 	mnt_free_lock(cxt->lock);
 	mnt_free_update(cxt->update);
 
@@ -128,6 +127,8 @@
 	DBG(CXT, ul_debugobj(cxt, "<---- reset [status=%d] ---->",
 				mnt_context_get_status(cxt)));
 
+	mnt_context_clear_loopdev(cxt); /* this _has_ to be called before cxt->fs gets freed */
+
 	fl = cxt->flags;
 
 	mnt_unref_fs(cxt->fs);
diff -urN util-linux-2.29.2/libmount/src/context_loopdev1.c util-linux-2.29.2-AES/libmount/src/context_loopdev1.c
--- util-linux-2.29.2/libmount/src/context_loopdev1.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/context_loopdev1.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,1525 @@
+/*
+ * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+
+/* (c) 2001-2012 Jari Ruusu */
+
+#include <blkid.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <ctype.h>
+
+#include "mountP.h"
+#include "linux_version.h"
+
+#include <linux/version.h>
+#include <linux/posix_types.h>
+
+#include "sha512.h"
+#include "rmd160.h"
+#include "aes.h"
+
+
+#define LO_CRYPT_NONE   0
+#define LO_CRYPT_XOR    1
+#define LO_CRYPT_DES    2
+#define LO_CRYPT_CRYPTOAPI 18
+
+#define LOOP_SET_FD		0x4C00
+#define LOOP_CLR_FD		0x4C01
+#define LOOP_SET_STATUS		0x4C02
+#define LOOP_GET_STATUS		0x4C03
+#define LOOP_SET_STATUS64	0x4C04
+#define LOOP_GET_STATUS64	0x4C05
+#define LOOP_MULTI_KEY_SETUP 	0x4C4D
+#define LOOP_MULTI_KEY_SETUP_V3	0x4C4E
+#define LOOP_RECOMPUTE_DEV_SIZE 0x4C52
+
+#define LO_NAME_SIZE    64
+#define LO_KEY_SIZE     32
+
+struct loop_info {
+	int		lo_number;
+#if LINUX_VERSION_CODE >= 0x20600
+	__kernel_old_dev_t lo_device;
+#else
+	__kernel_dev_t	lo_device;
+#endif
+	unsigned long	lo_inode;
+#if LINUX_VERSION_CODE >= 0x20600
+	__kernel_old_dev_t lo_rdevice;
+#else
+	__kernel_dev_t	lo_rdevice;
+#endif
+	int		lo_offset;
+	int		lo_encrypt_type;
+	int		lo_encrypt_key_size;
+	int		lo_flags;
+	char		lo_name[LO_NAME_SIZE];
+	unsigned char	lo_encrypt_key[LO_KEY_SIZE];
+	unsigned long	lo_init[2];
+	char		reserved[4];
+};
+
+struct loop_info64 {
+	u_int64_t	lo_device; 		/* ioctl r/o */
+	u_int64_t	lo_inode; 		/* ioctl r/o */
+	u_int64_t	lo_rdevice; 		/* ioctl r/o */
+	u_int64_t	lo_offset;		/* bytes */
+	u_int64_t	lo_sizelimit;		/* bytes, 0 == max available */
+	u_int32_t	lo_number;		/* ioctl r/o */
+	u_int32_t	lo_encrypt_type;
+	u_int32_t	lo_encrypt_key_size; 	/* ioctl w/o */
+	u_int32_t	lo_flags;		/* ioctl r/o */
+	unsigned char	lo_file_name[LO_NAME_SIZE];
+	unsigned char	lo_crypt_name[LO_NAME_SIZE];
+	unsigned char	lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
+	u_int64_t	lo_init[2];
+};
+
+#if !defined(LOOP_PASSWORD_MIN_LENGTH)
+# define  LOOP_PASSWORD_MIN_LENGTH   20
+#endif
+
+typedef struct {
+	char *multiKeyPass[66];
+	int multiKeyMode;
+	char *loopFileName;
+	char *pass_cb_string;
+	char *extraPtrToFree;
+
+	char *loopDevName;
+	char *loopOffsetBytes;
+	char *loopSizeBytes;
+	char *loopEncryptionType;
+	char *passSeedString;
+	char *passHashFuncName;
+	char *passIterThousands;
+	char *loInitValue;
+	char *gpgKeyFile;
+	char *gpgHomeDir;
+	char *clearTextKeyFile;
+} loDev_passInfo;
+
+
+
+static int loDev_rd_wr_retry(int fd, char *buf, int cnt, int w)
+{
+	int x, y, z;
+
+	x = 0;
+	while(x < cnt) {
+		y = cnt - x;
+		if(w) {
+			z = write(fd, buf + x, y);
+		} else {
+			z = read(fd, buf + x, y);
+			if (!z) return x;
+		}
+		if(z < 0) {
+			if ((errno == EAGAIN) || (errno == ENOMEM) || (errno == ERESTART) || (errno == EINTR)) {
+				continue;
+			}
+			return x;
+		}
+		x += z;
+	}
+	return x;
+}
+
+static char *loDev_get_FD_pass(int fd)
+{
+	char *p = NULL, *n;
+	int x = 0, y = 0;
+
+	do {
+		if(y >= (x - 1)) {
+			x += 128;
+			/* Must enforce some max limit here -- this code   */
+			/* runs as part of mount, and mount is setuid root */
+			/* and has used mlockall(MCL_CURRENT | MCL_FUTURE) */
+			if(x > (4*1024)) {
+				error_out:
+				if(p) {
+					memset(p, 0, y);
+					free(p);
+				}
+				return NULL;
+			}
+			n = malloc(x);
+			if(!n) goto error_out;
+			if(p) {
+				memcpy(n, p, y);
+				memset(p, 0, y);
+				free(p);
+			}
+			p = n;
+		}
+		if(loDev_rd_wr_retry(fd, p + y, 1, 0) != 1) break;
+		if((p[y] == '\n') || !p[y]) break;
+		y++;
+	} while(1);
+	if(p) p[y] = 0;
+	return p;
+}
+
+static unsigned long long loDev_mystrtoull(char *s, int acceptAT)
+{
+	unsigned long long v = 0;
+	int negative = 0;
+
+	while ((*s == ' ') || (*s == '\t'))
+		s++;
+	if (acceptAT && (*s == '@')) {
+		s++;
+		negative = 1;
+	}
+	if (*s == '0') {
+		s++;
+		if ((*s == 'x') || (*s == 'X')) {
+			s++;
+			sscanf(s, "%llx", &v);
+		} else {
+			sscanf(s, "%llo", &v);
+		}
+	} else {
+		sscanf(s, "%llu", &v);
+	}
+	return negative ? -v : v;
+}
+
+static void loDev_warnAboutBadKeyData(struct libmnt_context *cxt, int x)
+{
+	if((x > 1) && (x != 64) && (x != 65)) {
+		DBG(CXT, ul_debugobj(cxt, "Warning: Unknown key data format - using it anyway"));
+	}
+}
+
+
+static int loDev_are_these_files_same(const char *name1, const char *name2)
+{
+	struct stat statbuf1;
+	struct stat statbuf2;
+
+	if(!name1 || !*name1 || !name2 || !*name2) return 0;
+	if(stat(name1, &statbuf1)) return 0;
+	if(stat(name2, &statbuf2)) return 0;
+	if(statbuf1.st_dev != statbuf2.st_dev) return 0;
+	if(statbuf1.st_ino != statbuf2.st_ino) return 0;
+	return 1;   /* are same */
+}
+
+static char *loDev_do_GPG_pipe(struct libmnt_context *cxt, loDev_passInfo *pi, char *pass)
+{
+	int     x, pfdi[2], pfdo[2], failed = 0;
+	char    str[10], *a[16], *e[2], *h;
+	pid_t   gpid;
+	struct passwd *p;
+	void    *oldSigPipeHandler;
+
+	if((getuid() == 0) && pi->gpgHomeDir && pi->gpgHomeDir[0]) {
+		h = pi->gpgHomeDir;
+	} else {
+		if(!(p = getpwuid(getuid()))) {
+			DBG(CXT, ul_debugobj(cxt, "Error: Unable to detect home directory"));
+			return NULL;
+		}
+		h = p->pw_dir;
+	}
+	if(!(e[0] = malloc(strlen(h) + 6))) {
+		nomem1:
+		DBG(CXT, ul_debugobj(cxt, "Error: Unable to allocate memory"));
+		return NULL;
+	}
+	sprintf(e[0], "HOME=%s", h);
+	e[1] = 0;
+
+	if(pipe(&pfdi[0])) {
+		nomem2:
+		free(e[0]);
+		goto nomem1;
+	}
+	if(pipe(&pfdo[0])) {
+		close(pfdi[0]);
+		close(pfdi[1]);
+		goto nomem2;
+	}
+
+	/*
+	 * When this code is run as part of mount, only root can set
+	 * 'gpgKeyFile' and as such, only root can decide what file is opened
+	 * below. However, since mount is usually setuid-root all non-root
+	 * users can also open() the file too, but that file's contents are
+	 * only piped to gpg. This readable-for-all is intended behaviour,
+	 * and is very useful in situations where non-root users mount loop
+	 * devices with their own gpg private key, and yet don't have access
+	 * to the actual key used to encrypt loop device.
+	 */
+	if((x = open(pi->gpgKeyFile, O_RDONLY)) == -1) {
+		DBG(CXT, ul_debugobj(cxt, "Error: unable to open gpg key file for reading"));
+		nomem3:
+		free(e[0]);
+		close(pfdo[0]);
+		close(pfdo[1]);
+		close(pfdi[0]);
+		close(pfdi[1]);
+		return NULL;
+	}
+
+	/*
+	 * If someone puts a gpg key file at beginning of device and
+	 * puts the real file system at some offset into the device,
+	 * this code extracts that gpg key file into a temp file so gpg
+	 * won't end up reading whole device when decrypting the key file.
+	 *
+	 * Example of encrypted cdrom mount with 8192 bytes reserved for gpg key file:
+	 * mount -t iso9660 /dev/cdrom /cdrom -o loop=/dev/loop0,encryption=AES128,gpgkey=/dev/cdrom,offset=8192
+	 *                  ^^^^^^^^^^                                                    ^^^^^^^^^^        ^^^^
+	 */
+	if(pi->loopOffsetBytes && loDev_are_these_files_same(pi->loopFileName, pi->gpgKeyFile)) {
+		FILE *f;
+		char b[1024];
+		long long cnt;
+		int cnt2, cnt3;
+
+		cnt = loDev_mystrtoull(pi->loopOffsetBytes, 1);
+		if(cnt < 0) cnt = -cnt;
+		if(cnt > (1024 * 1024)) cnt = 1024 * 1024; /* sanity check */
+		f = tmpfile();
+		if(!f) {
+			DBG(CXT, ul_debugobj(cxt, "Error: unable to create temp file"));
+			close(x);
+			goto nomem3;
+		}
+		while(cnt > 0) {
+			cnt2 = sizeof(b);
+			if(cnt < cnt2) cnt2 = cnt;
+			cnt3 = loDev_rd_wr_retry(x, b, cnt2, 0);
+			if(cnt3 && (fwrite(b, cnt3, 1, f) != 1)) {
+				tmpWrErr:
+				DBG(CXT, ul_debugobj(cxt, "Error: unable to write to temp file"));
+				fclose(f);
+				close(x);
+				goto nomem3;
+			}
+			if(cnt2 != cnt3) break;
+			cnt -= cnt3;
+		}
+		if(fflush(f)) goto tmpWrErr;
+		close(x);
+		x = dup(fileno(f));
+		fclose(f);
+		lseek(x, 0L, SEEK_SET);
+	}
+
+	sprintf(str, "%d", pfdi[0]);
+	if(!(gpid = fork())) {
+		dup2(x, 0);
+		dup2(pfdo[1], 1);
+		close(x);
+		close(pfdi[1]);
+		close(pfdo[0]);
+		close(pfdo[1]);
+		if((x = open("/dev/null", O_WRONLY)) >= 0) {
+			dup2(x, 2);
+			close(x);
+		}
+		x = 0;
+		a[x++] = "gpg";
+		if(pi->gpgHomeDir && pi->gpgHomeDir[0]) {
+			a[x++] = "--homedir";
+			a[x++] = pi->gpgHomeDir;
+		}
+		a[x++] = "--no-options";
+		a[x++] = "--quiet";
+		a[x++] = "--batch";
+		a[x++] = "--no-tty";
+		a[x++] = "--passphrase-fd";
+		a[x++] = str;
+		a[x++] = "--decrypt";
+		a[x] = 0;
+		if(setgid(getgid())) exit(1);
+		if(setuid(getuid())) exit(1);
+		for(x = 3; x < 1024; x++) {
+			if(x == pfdi[0]) continue;
+			close(x);
+		}
+		execve("/bin/gpg", &a[0], &e[0]);
+		execve("/usr/bin/gpg", &a[0], &e[0]);
+		execve("/usr/local/bin/gpg", &a[0], &e[0]);
+		exit(1);
+	}
+	free(e[0]);
+	close(x);
+	close(pfdi[0]);
+	close(pfdo[1]);
+	if(gpid == -1) {
+		close(pfdi[1]);
+		close(pfdo[0]);
+		goto nomem1;
+	}
+
+	x = strlen(pass);
+
+	/* ignore possible SIGPIPE signal while writing to gpg */
+	oldSigPipeHandler = signal(SIGPIPE, SIG_IGN);
+	loDev_rd_wr_retry(pfdi[1], pass, x, 1);
+	loDev_rd_wr_retry(pfdi[1], "\n", 1, 1);
+	if(oldSigPipeHandler != SIG_ERR) signal(SIGPIPE, oldSigPipeHandler);
+
+	close(pfdi[1]);
+	memset(pass, 0, x);
+	x = 0;
+	while(x < 66) {
+		if(pi->multiKeyPass[x]) {
+			free(pi->multiKeyPass[x]);
+			pi->multiKeyPass[x] = NULL;
+		}
+		x++;
+	}
+	x = 0;
+	while(x < 66) {
+		pi->multiKeyPass[x] = loDev_get_FD_pass(pfdo[0]);
+		if(!pi->multiKeyPass[x]) {
+			/* mem alloc failed - abort */
+			failed = 1;
+			break;
+		}
+		if(strlen(pi->multiKeyPass[x]) < LOOP_PASSWORD_MIN_LENGTH) break;
+		x++;
+	}
+	loDev_warnAboutBadKeyData(cxt, x);
+	if(x >= 65)
+		pi->multiKeyMode = 65;
+	if(x == 64)
+		pi->multiKeyMode = 64;
+	close(pfdo[0]);
+	waitpid(gpid, &x, 0);
+	if(failed || !pi->multiKeyPass[0]) goto nomem1;
+	return pi->multiKeyPass[0];
+}
+
+/* password returned by this function must not be free()ed directly, because it
+   came from either cxt->pwd_get_cb() or is a duplicate of pi->multiKeyPass[0].
+   cxt->pwd_release_cb() free()s the one that came from cxt->pwd_get_cb() and
+   pi->multiKeyPass[0] gets free()d with rest of pi->multiKeyPass[] pointers.
+   If this function actually malloc()s a pointer, a copy is at pi->extraPtrToFree */
+static char *loDev_sGetPass(struct libmnt_context *cxt, loDev_passInfo *pi, int minLen, int warnLen)
+{
+	char *p, *s, *seed;
+	int i, x;
+
+	if(pi->clearTextKeyFile) {
+		if((i = open(pi->clearTextKeyFile, O_RDONLY)) == -1) {
+			DBG(CXT, ul_debugobj(cxt, "Error: unable to open cleartext key file for reading"));
+			return NULL;
+		}
+		x = 0;
+		while(x < 66) {
+			pi->multiKeyPass[x] = loDev_get_FD_pass(i);
+			if(!pi->multiKeyPass[x]) {
+				close(i);
+				goto nomem;
+			}
+			if(strlen(pi->multiKeyPass[x]) < LOOP_PASSWORD_MIN_LENGTH) break;
+			x++;
+		}
+		close(i);
+		loDev_warnAboutBadKeyData(cxt, x);
+		if(x >= 65) {
+			pi->multiKeyMode = 65;
+			return pi->multiKeyPass[0];
+		}
+		if(x == 64) {
+			pi->multiKeyMode = 64;
+			return pi->multiKeyPass[0];
+		}
+		p = pi->multiKeyPass[0];
+	} else {
+		if(!cxt->pwd_get_cb)
+			return NULL;
+		DBG(CXT, ul_debugobj(cxt, "asking for pass"));
+		p = pi->pass_cb_string = cxt->pwd_get_cb(cxt);
+	}
+	
+	if(!p) goto nomem;
+	if(pi->gpgKeyFile && pi->gpgKeyFile[0]) {
+		p = loDev_do_GPG_pipe(cxt, pi, p);
+		if(!p) return NULL;
+		if(!p[0]) {
+			DBG(CXT, ul_debugobj(cxt, "Error: gpg key file decryption failed"));
+			return NULL;
+		}
+		if(pi->multiKeyMode) return p;
+	}
+	i = strlen(p);
+	if(i < minLen) {
+		DBG(CXT, ul_debugobj(cxt, "Error: Password is too short"));
+		return NULL;
+	}
+	seed = pi->passSeedString;
+	if(!seed) seed = "";
+	s = pi->extraPtrToFree = malloc(i + strlen(seed) + 1);
+	if(!s) {
+		memset(p, 0, i);
+		nomem:
+		DBG(CXT, ul_debugobj(cxt, "Error: Unable to allocate memory"));
+		return NULL;
+	}
+	strcpy(s, p);
+	memset(p, 0, i);
+	if(i < warnLen) {
+		DBG(CXT, ul_debugobj(cxt, "WARNING - Please use longer password"));
+	}
+	strcat(s, seed);
+	return(s);
+}
+
+/* this is for compatibility with historic loop-AES version */
+static void loDev_unhashed1_key_setup(unsigned char *keyStr, int ile, unsigned char *keyBuf, int bufSize)
+{
+	register int    x, y, z, cnt = ile;
+	unsigned char   *kp;
+
+	memset(keyBuf, 0, bufSize);
+	kp = keyStr;
+	for(x = 0; x < (bufSize * 8); x += 6) {
+		y = *kp++;
+		if(--cnt <= 0) {
+			kp = keyStr;
+			cnt = ile;
+		}
+		if((y >= '0') && (y <= '9')) y -= '0';
+		else if((y >= 'A') && (y <= 'Z')) y -= ('A' - 10);
+		else if((y >= 'a') && (y <= 'z')) y -= ('a' - 36);
+		else if((y == '.') || (y == '/')) y += (62 - '.');
+		else y &= 63;
+		z = x >> 3;
+		if(z < bufSize) {
+			keyBuf[z] |= y << (x & 7);
+		}
+		z++;
+		if(z < bufSize) {
+			keyBuf[z] |= y >> (8 - (x & 7));
+		}
+	}
+}
+
+/* this is for compatibility with mainline mount */
+static void loDev_unhashed2_key_setup(unsigned char *keyStr, int ile, unsigned char *keyBuf, int bufSize)
+{
+	memset(keyBuf, 0, bufSize);
+	strncpy((char *)keyBuf, (char *)keyStr, bufSize - 1);
+	keyBuf[bufSize - 1] = 0;
+}
+
+static void loDev_rmd160HashTwiceWithA(unsigned char *ib, int ile, unsigned char *ob, int ole)
+{
+	char tmpBuf[20 + 20];
+	char pwdCopy[130];
+
+	if(ole < 1) return;
+	memset(ob, 0, ole);
+	if(ole > 40) ole = 40;
+	__loDev_rmd160_hash_buffer(&tmpBuf[0], (char *)ib, ile);
+	pwdCopy[0] = 'A';
+	if(ile > sizeof(pwdCopy) - 1) ile = sizeof(pwdCopy) - 1;
+	memcpy(pwdCopy + 1, ib, ile);
+	__loDev_rmd160_hash_buffer(&tmpBuf[20], pwdCopy, ile + 1);
+	memcpy(ob, tmpBuf, ole);
+	memset(tmpBuf, 0, sizeof(tmpBuf));
+	memset(pwdCopy, 0, sizeof(pwdCopy));
+}
+
+extern long long llseek(int, long long, int);
+
+static long long loDev_xx_lseek(int fd, long long offset, int whence)
+{
+	if(sizeof(off_t) >= 8) {
+		return lseek(fd, offset, whence);
+	} else {
+		return llseek(fd, offset, whence);
+	}
+}
+
+static int loDev_create_random_keys(struct libmnt_context *cxt, char *partition, long long offset, long long sizelimit, int loopro, unsigned char *k)
+{
+	int x, y, fd;
+	sha512_context s;
+	unsigned char b[4096];
+
+	if(loopro) {
+		DBG(CXT, ul_debugobj(cxt, "Error: read-only device"));
+		return 1;
+	}
+
+	/*
+	 * Compute SHA-512 over first 40 KB of old fs data. SHA-512 hash
+	 * output is then used as entropy for new fs encryption key.
+	 */
+	if((fd = open(partition, O_RDWR)) == -1) {
+		seekFailed:
+		DBG(CXT, ul_debugobj(cxt, "Error: unable to open/seek device"));
+		return 1;
+	}
+	if(offset < 0) offset = -offset;
+	if(loDev_xx_lseek(fd, offset, SEEK_SET) == -1) {
+		close(fd);
+		goto seekFailed;
+	}
+	__loDev_sha512_init(&s);
+	for(x = 1; x <= 10; x++) {
+		if((sizelimit > 0) && ((sizeof(b) * x) > sizelimit)) break;
+		if(loDev_rd_wr_retry(fd, (char *) &b[0], sizeof(b), 0) != sizeof(b)) break;
+		__loDev_sha512_write(&s, &b[0], sizeof(b));
+	}
+	__loDev_sha512_final(&s);
+
+	/*
+	 * Overwrite 40 KB of old fs data 20 times so that recovering
+	 * SHA-512 output beyond this point is difficult and expensive.
+	 */
+	for(y = 0; y < 20; y++) {
+		int z;
+		struct {
+			struct timeval tv;
+			unsigned char h[64];
+			int x,y,z;
+		} j;
+		if(loDev_xx_lseek(fd, offset, SEEK_SET) == -1) break;
+		memcpy(&j.h[0], &s.sha_out[0], 64);
+		gettimeofday(&j.tv, NULL);
+		j.y = y;
+		for(x = 1; x <= 10; x++) {
+			j.x = x;
+			for(z = 0; z < sizeof(b); z += 64) {
+				j.z = z;
+				__loDev_sha512_hash_buffer((unsigned char *)&j, sizeof(j), &b[z], 64);
+			}
+			if((sizelimit > 0) && ((sizeof(b) * x) > sizelimit)) break;
+			if(loDev_rd_wr_retry(fd, (char *) &b[0], sizeof(b), 1) != sizeof(b)) break;
+		}
+		memset(&j, 0, sizeof(j));
+		if(fsync(fd)) break;
+	}
+	close(fd);
+
+	/*
+	 * Use all 512 bits of hash output
+	 */
+	memcpy(&b[0], &s.sha_out[0], 64);
+	memset(&s, 0, sizeof(s));
+
+	/*
+	 * Read 32 bytes of random entropy from kernel's random
+	 * number generator. This code may be executed early on startup
+	 * scripts and amount of random entropy may be non-existent.
+	 * SHA-512 of old fs data is used as workaround for missing
+	 * entropy in kernel's random number generator.
+	 */
+	if((fd = open("/dev/urandom", O_RDONLY)) == -1) {
+		DBG(CXT, ul_debugobj(cxt, "Error: unable to open /dev/urandom"));
+		return 1;
+	}
+	loDev_rd_wr_retry(fd, (char *) &b[64], 32, 0);
+
+	/* generate multi-key hashes */
+	x = 0;
+	while(x < 65) {
+		loDev_rd_wr_retry(fd, (char *) &b[64+32], 16, 0);
+		__loDev_sha512_hash_buffer(&b[0], 64+32+16, k, 32);
+		k += 32;
+		x++;
+	}
+
+	close(fd);
+	memset(&b[0], 0, sizeof(b));
+	return 0;
+}
+
+static int loDev_fork_mkfs_command(struct libmnt_context *cxt, char *device, char *fstype)
+{
+	int x, y = 0;
+	char *a[10], *e[2];
+
+	sync();
+	if(!(x = fork())) {
+		if((x = open("/dev/null", O_WRONLY)) >= 0) {
+			dup2(x, 0);
+			dup2(x, 1);
+			dup2(x, 2);
+			close(x);
+		}
+		x = 0;
+		a[x++] = "mkfs";
+		a[x++] = "-t";
+		a[x++] = fstype;
+		/* mkfs.reiserfs and mkfs.xfs need -f option */
+		if(!strcmp(fstype, "reiserfs") || !strcmp(fstype, "xfs")) {
+			a[x++] = "-f";
+		}
+		a[x++] = device;
+		a[x] = 0;
+		e[0] = "PATH=/sbin:/usr/sbin";
+		e[1] = 0;
+		if(setgid(getgid())) exit(1);
+		if(setuid(getuid())) exit(1);
+		for(x = 3; x < 1024; x++) {
+			close(x);
+		}
+		execve("/sbin/mkfs", &a[0], &e[0]);
+		exit(1);
+	}
+	if(x == -1) {
+		DBG(CXT, ul_debugobj(cxt, "Error: fork failed"));
+		return 1;
+	}
+	waitpid(x, &y, 0);
+	sync();
+	if(!WIFEXITED(y) || (WEXITSTATUS(y) != 0)) {
+		DBG(CXT, ul_debugobj(cxt, "Error: encrypted file system mkfs failed"));
+		return 1;
+	}
+	return 0;
+}
+
+static void loDev_convert_info_to_info64(struct loop_info *info, struct loop_info64 *info64)
+{
+	memset(info64, 0, sizeof(*info64));
+	info64->lo_number = info->lo_number;
+	info64->lo_device = info->lo_device;
+	info64->lo_inode = info->lo_inode;
+	info64->lo_rdevice = info->lo_rdevice;
+	info64->lo_offset = info->lo_offset;
+	info64->lo_encrypt_type = info->lo_encrypt_type;
+	info64->lo_encrypt_key_size = info->lo_encrypt_key_size;
+	info64->lo_flags = info->lo_flags;
+	info64->lo_init[0] = info->lo_init[0];
+	info64->lo_init[1] = info->lo_init[1];
+	info64->lo_sizelimit = 0;
+	if (info->lo_encrypt_type == 18) /* LO_CRYPT_CRYPTOAPI */
+		memcpy(info64->lo_crypt_name, info->lo_name, sizeof(info64->lo_crypt_name));
+	else
+		memcpy(info64->lo_file_name, info->lo_name, sizeof(info64->lo_file_name));
+	memcpy(info64->lo_encrypt_key, info->lo_encrypt_key, sizeof(info64->lo_encrypt_key));
+}
+
+static int loDev_convert_info64_to_info(struct loop_info64 *info64, struct loop_info *info)
+{
+	memset(info, 0, sizeof(*info));
+	info->lo_number = info64->lo_number;
+	info->lo_device = info64->lo_device;
+	info->lo_inode = info64->lo_inode;
+	info->lo_rdevice = info64->lo_rdevice;
+	info->lo_offset = info64->lo_offset;
+	info->lo_encrypt_type = info64->lo_encrypt_type;
+	info->lo_encrypt_key_size = info64->lo_encrypt_key_size;
+	info->lo_flags = info64->lo_flags;
+	info->lo_init[0] = info64->lo_init[0];
+	info->lo_init[1] = info64->lo_init[1];
+	if (info->lo_encrypt_type == 18) /* LO_CRYPT_CRYPTOAPI */
+		memcpy(info->lo_name, info64->lo_crypt_name, sizeof(info->lo_name));
+	else
+		memcpy(info->lo_name, info64->lo_file_name, sizeof(info->lo_name));
+	memcpy(info->lo_encrypt_key, info64->lo_encrypt_key, sizeof(info->lo_encrypt_key));
+
+	/* error in case values were truncated */
+	if (info->lo_device != info64->lo_device ||
+	    info->lo_rdevice != info64->lo_rdevice ||
+	    info->lo_inode != info64->lo_inode ||
+	    info->lo_offset != info64->lo_offset ||
+	    info64->lo_sizelimit) {
+		return -1;
+	}
+	return 0;
+}
+
+static int loDev_set_status64_ioctl(int fd, struct loop_info64 *info64)
+{
+	struct loop_info info;
+	struct loop_info64 tmp;
+	int r;
+
+	/*
+	 * This ugly work around is needed because some
+	 * Red Hat kernels are using same ioctl code:
+	 *  	#define LOOP_CHANGE_FD 0x4C04
+	 * vs.
+	 *	#define LOOP_SET_STATUS64 0x4C04
+	 * that is used by modern loop driver.
+	 *
+	 * Attempt to detect presense of LOOP_GET_STATUS64
+	 * ioctl before issuing LOOP_SET_STATUS64 ioctl.
+	 * Red Hat kernels with above LOOP_CHANGE_FD damage
+	 * should return -1 and set errno to EINVAL.
+	 */
+	r = ioctl(fd, LOOP_GET_STATUS64, &tmp);
+	memset(&tmp, 0, sizeof(tmp));
+	if ((r == 0) || (errno != EINVAL)) {
+		r = ioctl(fd, LOOP_SET_STATUS64, info64);
+		if (!r)
+			return 0;
+	}
+	r = loDev_convert_info64_to_info(info64, &info);
+	if (!r)
+		r = ioctl(fd, LOOP_SET_STATUS, &info);
+
+	/* don't leave copies of encryption key on stack */
+	memset(&info, 0, sizeof(info));
+	return r;
+}
+
+static int loDev_get_status64_ioctl(int fd, struct loop_info64 *info64)
+{
+	struct loop_info info;
+	int r;
+
+	memset(info64, 0, sizeof(*info64));
+	r = ioctl(fd, LOOP_GET_STATUS64, info64);
+	if (!r)
+		return 0;
+	r = ioctl(fd, LOOP_GET_STATUS, &info);
+	if (!r)
+		loDev_convert_info_to_info64(&info, info64);
+
+	/* don't leave copies of encryption key on stack */
+	memset(&info, 0, sizeof(info));
+	return r;
+}
+
+/* returns: 1=unused 0=busy */
+static int loDev_is_unused_loop_device(int fd)
+{
+	struct loop_info64 info64;
+	struct loop_info info;
+	int r;
+
+	r = ioctl(fd, LOOP_GET_STATUS64, &info64);
+	memset(&info64, 0, sizeof(info64));
+	if (!r)
+		return 0;
+	if (errno == ENXIO)
+		return 1;
+
+	r = ioctl(fd, LOOP_GET_STATUS, &info);
+	memset(&info, 0, sizeof(info));
+	if (!r)
+		return 0;
+	if (errno == ENXIO)
+		return 1;
+	if (errno == EOVERFLOW)
+		return 0;
+	return 1;
+}
+
+struct loDev_crypt_type_struct {
+	short int id;
+	unsigned char flags; /* bit0 = show keybits, bit1 = add '-' before keybits */
+	unsigned char keyBytes;
+	char *name;
+};
+
+static struct loDev_crypt_type_struct loDev_crypt_type_tbl[] = {
+	{  0, 0,  0, "no" },
+	{  0, 0,  0, "none" },
+	{  1, 0,  0, "xor" },
+	{  3, 1, 16, "twofish" },
+	{  4, 1, 16, "blowfish" },
+	{  7, 1, 16, "serpent" },
+	{  8, 1, 16, "mars" },
+	{ 11, 3, 16, "rc6" },
+	{ 12, 0, 21, "tripleDES" },
+	{ 12, 0, 24, "3des" },
+	{ 12, 0, 24, "des3_ede" },
+	{ 16, 1, 16, "AES" },
+	{ -1, 0,  0, NULL }
+};
+
+static char *loDev_getApiName(char *e, int *len)
+{
+	int x, y, z = 1, q = -1;
+	unsigned char *s;
+
+	*len = y = 0;
+	s = (unsigned char *)strdup(e);
+	if(!s)
+		return NULL;
+	x = strlen((char *)s);
+	while(x > 0) {
+		x--;
+		if(!isdigit(s[x]))
+			break;
+		y += (s[x] - '0') * z;
+		z *= 10;
+		q = x;
+	}
+	while(x >= 0) {
+		s[x] = tolower(s[x]);
+		if(s[x] == '-')
+			s[x] = 0;
+		x--;
+	}
+	if(y >= 40) {
+		if(q >= 0)
+			s[q] = 0;
+		*len = y;
+	}
+	return((char *)s);
+}
+
+static int loDev_crypt_type_fn(const char *name, u_int32_t *kbyp, char **apiName)
+{
+	int i, k;
+	char *s;
+
+	*apiName = s = loDev_getApiName((char *)name, &k);
+	if(!s) s = "";
+	if(k < 0)
+		k = 0;
+	if(k > 256)
+		k = 256;
+	for (i = 0; loDev_crypt_type_tbl[i].id != -1; i++) {
+		if (!strcasecmp (s , loDev_crypt_type_tbl[i].name)) {
+			*kbyp = k ? k >> 3 : loDev_crypt_type_tbl[i].keyBytes;
+			return loDev_crypt_type_tbl[i].id;
+		}
+	}
+	*kbyp = 16; /* 128 bits */
+	return 18; /* LO_CRYPT_CRYPTOAPI */
+}
+
+static int loDev_try_cryptoapi_interface(int fd, struct loop_info64 *loopinfo, char *apiName)
+{
+	if(!apiName) apiName = "";
+	snprintf((char *)loopinfo->lo_crypt_name, sizeof(loopinfo->lo_crypt_name), "%s-cbc", apiName);
+	loopinfo->lo_crypt_name[LO_NAME_SIZE - 1] = 0;
+	loopinfo->lo_encrypt_type = 18; /* LO_CRYPT_CRYPTOAPI */
+	return(loDev_set_status64_ioctl(fd, loopinfo));
+}
+
+static int loDev_is_loop_device(const char *device)
+{
+	struct stat statbuf;
+
+	return (stat(device, &statbuf) == 0 &&
+		S_ISBLK(statbuf.st_mode) &&
+		major(statbuf.st_rdev) == 7);
+}
+
+int __loDev_is_loop_active_same_back(char *dev, char *backdev, char *offsetStr, char *sizelimitStr)
+{
+	int fd;
+	int ret = 0;
+	struct stat statbuf;
+	struct loop_info64 loopinfo;
+	uint64_t offset = 0, sizelimit = 0;
+
+	if(offsetStr)
+		offset = loDev_mystrtoull(offsetStr, 1);
+	if(sizelimitStr)
+		sizelimit = loDev_mystrtoull(sizelimitStr, 0);
+
+	if (stat (dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode) && major(statbuf.st_rdev) == 7) {
+		if(stat (backdev, &statbuf) != 0)
+			return 0;
+		fd = open (dev, O_RDONLY);
+		if (fd < 0)
+			return 0;
+		if ((loDev_get_status64_ioctl(fd, &loopinfo) == 0)
+		    && (loopinfo.lo_offset == offset)
+		    && (loopinfo.lo_sizelimit == sizelimit)
+		    && (statbuf.st_dev == loopinfo.lo_device)
+		    && (statbuf.st_ino == loopinfo.lo_inode))
+			ret = 1; /* backing device matches */
+		memset(&loopinfo, 0, sizeof(loopinfo));
+		close(fd);
+	}
+	return ret;
+}
+
+#define SIZE(a) (sizeof(a)/sizeof(a[0]))
+
+static char * loDev_find_unused_loop_device(void)
+{
+	/* Just creating a device, say in /tmp, is probably a bad idea -
+	   people might have problems with backup or so.
+	   So, we just try /dev/loop[0-7]. */
+	char dev[20];
+	char *loop_formats[] = { "/dev/loop%d", "/dev/loop/%d" };
+	int i, j, fd, somedev = 0, someloop = 0;
+	struct stat statbuf;
+
+	for (j = 0; j < SIZE(loop_formats); j++) {
+	    for(i = 0; i < 256; i++) {
+		sprintf(dev, loop_formats[j], i);
+		if (stat (dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
+			somedev++;
+			fd = open (dev, O_RDONLY);
+			if (fd >= 0) {
+				if (loDev_is_unused_loop_device(fd) == 0)
+					someloop++;		/* in use */
+				else if (errno == ENXIO) {
+					close (fd);
+					return strdup(dev);/* probably free */
+				}
+				close (fd);
+			}
+			continue;/* continue trying as long as devices exist */
+		}
+		break;
+	    }
+	}
+	return 0;
+}
+
+int mnt_context_is_loopdev(struct libmnt_context *cxt)
+{
+	const char *type, *src;
+
+	assert(cxt);
+
+	/* The mount flags have to be merged, otherwise we have to use
+	 * expensive mnt_context_get_user_mflags() instead of cxt->user_mountflags. */
+	assert((cxt->flags & MNT_FL_MOUNTFLAGS_MERGED));
+
+	if (!cxt->fs)
+		return 0;
+	src = mnt_fs_get_srcpath(cxt->fs);
+	if (!src)
+		return 0;		/* backing file not set */
+
+	if (cxt->user_mountflags & (MNT_MS_LOOP |
+				    MNT_MS_OFFSET |
+				    MNT_MS_SIZELIMIT)) {
+
+		DBG(CXT, ul_debugobj(cxt, "loopdev specific options detected"));
+		return 1;
+	}
+
+	if (cxt->mountflags & (MS_BIND | MS_MOVE | MS_PROPAGATION))
+		return 0;
+
+	/* Automatically create a loop device from a regular file if a
+	 * filesystem is not specified or the filesystem is known for libblkid
+	 * (these filesystems work with block devices only). The file size
+	 * should be at least 1KiB otherwise we will create empty loopdev where
+	 * is no mountable filesystem...
+	 *
+	 * Note that there is not a restriction (on kernel side) that prevents regular
+	 * file as a mount(2) source argument. A filesystem that is able to mount
+	 * regular files could be implemented.
+	 */
+	type = mnt_fs_get_fstype(cxt->fs);
+
+	if (mnt_fs_is_regular(cxt->fs) &&
+	    (!type || strcmp(type, "auto") == 0 || blkid_known_fstype(type))) {
+		struct stat st;
+
+		if (stat(src, &st) == 0 && S_ISREG(st.st_mode) &&
+		    st.st_size > 1024)
+			return 1;
+	}
+
+	return 0;
+}
+
+
+/* Check, if there already exists a mounted loop device on the mountpoint node
+ * with the same parameters.
+ */
+static int is_mounted_same_loopfile(struct libmnt_context *cxt,
+				    const char *target,
+				    char *backing_file,
+				    char *offsetStr, char *sizelimitStr)
+{
+	struct libmnt_table *tb;
+	struct libmnt_iter itr;
+	struct libmnt_fs *fs;
+	struct libmnt_cache *cache;
+
+	assert(cxt);
+	assert(cxt->fs);
+	assert((cxt->flags & MNT_FL_MOUNTFLAGS_MERGED));
+
+	if (!target || !backing_file || mnt_context_get_mtab(cxt, &tb))
+		return 0;
+
+	DBG(CXT, ul_debugobj(cxt, "checking if %s mounted on %s",
+				backing_file, target));
+
+	cache = mnt_context_get_cache(cxt);
+	mnt_reset_iter(&itr, MNT_ITER_BACKWARD);
+
+	/* Search for mountpoint node in mtab, procceed if any of these has the
+	 * loop option set or the device is a loop device
+	 */
+	while (mnt_table_next_fs(tb, &itr, &fs) == 0) {
+		const char *src = mnt_fs_get_source(fs);
+		const char *opts = mnt_fs_get_user_options(fs);
+		char *val;
+		size_t len;
+		int res = 0;
+
+		if (!src || !mnt_fs_match_target(fs, target, cache))
+			continue;
+
+		if (strncmp(src, "/dev/loop", 9) == 0) {
+			res = __loDev_is_loop_active_same_back((char *) src, backing_file, offsetStr, sizelimitStr);
+
+		} else if (opts && (cxt->user_mountflags & MNT_MS_LOOP) &&
+		    mnt_optstr_get_option(opts, "loop", &val, &len) == 0 && val) {
+
+			val = strndup(val, len);
+			res = __loDev_is_loop_active_same_back((char *) val, backing_file, offsetStr, sizelimitStr);
+			free(val);
+		}
+
+		if (res) {
+			DBG(CXT, ul_debugobj(cxt, "%s already mounted", backing_file));
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+int mnt_context_setup_loopdev(struct libmnt_context *cxt)
+{
+	int loop_dev_fd = -1, backing_fi_fd = -1;
+	loDev_passInfo pi;
+	struct loop_info64 loopinfo;
+        int i;
+        char *pass = NULL, *apiName = NULL;
+        void (*hashFunc)(unsigned char *, int, unsigned char *, int);
+        unsigned char multiKeyBits[65][32];
+        int minPassLen = LOOP_PASSWORD_MIN_LENGTH;
+        int run_mkfs_command = 0;
+	int mode = O_RDWR;
+	int fixedLoopName = 0;
+	unsigned int chmodVal = 0;
+	const char *optstr;
+	char *val = NULL;
+	size_t len = 0;
+	int rc = 0, myErrno = 0;
+	uint64_t offset = 0, sizelimit = 0;
+
+
+	memset(&pi, 0, sizeof(pi));
+	assert(cxt);
+	assert(cxt->fs);
+	assert((cxt->flags & MNT_FL_MOUNTFLAGS_MERGED));
+	cxt->loopdev_fd = -1;
+
+	pi.loopFileName = (char *) mnt_fs_get_srcpath(cxt->fs);
+	if (!pi.loopFileName)
+		return -EINVAL;
+
+	DBG(CXT, ul_debugobj(cxt, "trying to setup loopdev for %s", pi.loopFileName));
+
+	if (cxt->mountflags & MS_RDONLY) {
+		DBG(CXT, ul_debugobj(cxt, "enabling READ-ONLY flag"));
+		mode = O_RDONLY;
+	}
+
+	optstr = mnt_fs_get_user_options(cxt->fs);
+
+#define MM(a,b)	if(mnt_optstr_get_option(optstr, a, &val, &len) == 0 && val && len) { 	\
+			if(!(b = strndup(val, len))) rc = -ENOMEM;			\
+		}
+
+	MM("loop",         pi.loopDevName);
+	MM("offset",       pi.loopOffsetBytes);
+	MM("sizelimit",    pi.loopSizeBytes);
+	MM("encryption",   pi.loopEncryptionType);
+	MM("pseed",        pi.passSeedString);
+	MM("phash",        pi.passHashFuncName);
+	MM("itercountk",   pi.passIterThousands);
+	MM("loinit",       pi.loInitValue);
+	MM("gpgkey",       pi.gpgKeyFile);
+	MM("gpghome",      pi.gpgHomeDir);
+	MM("cleartextkey", pi.clearTextKeyFile);
+
+#undef MM
+
+	if(pi.loopOffsetBytes)
+		offset = loDev_mystrtoull(pi.loopOffsetBytes, 1);
+	if(pi.loopSizeBytes)
+		sizelimit = loDev_mystrtoull(pi.loopSizeBytes, 0);
+
+	if (rc == 0 && is_mounted_same_loopfile(cxt, mnt_context_get_target(cxt), pi.loopFileName, pi.loopOffsetBytes, pi.loopSizeBytes))
+		rc = -EBUSY;
+	if (rc)
+		goto clean_up_out;
+	if(pi.loopDevName) {
+		fixedLoopName = 1;
+		if(__loDev_is_loop_active_same_back(pi.loopDevName, pi.loopFileName, pi.loopOffsetBytes, pi.loopSizeBytes)) {
+			/* loop device appears to be already set up to same backing file, so skip most of loop setup */
+			/* this is useful for encrypted losetup -> fsck -> mount, where passphrase needs to be typed only once */
+			rc = mnt_fs_set_source(cxt->fs, pi.loopDevName);
+			if(rc) goto clean_up_out;
+			goto skip_setup_ok_out;
+		}
+	} else if(cxt->fs && mnt_optstr_get_option(optstr, "loop", &val, &len) != 0) {
+		/* Looks like no "loop" option at all. Add one so it gets cleaned up by umount */
+		mnt_optstr_append_option(&cxt->fs->user_optstr, "loop", NULL);
+	}
+	if((backing_fi_fd = open(pi.loopFileName, mode)) < 0) {
+		DBG(CXT, ul_debugobj(cxt, "can't open backing device/file"));
+		myErrno = ENODEV;
+		rc = -MNT_ERR_LOOPDEV;
+		goto clean_up_out;
+	}
+
+try_again_another_loopdev:
+	sync();
+	if(!pi.loopDevName) {
+		pi.loopDevName = loDev_find_unused_loop_device();
+		if(!pi.loopDevName) {
+			DBG(CXT, ul_debugobj(cxt, "can't find free loop device"));
+			myErrno = ENODEV;
+			rc = -MNT_ERR_LOOPDEV;
+			goto clean_up_out;
+		}
+	}
+	if((loop_dev_fd = open(pi.loopDevName, mode)) < 0) {
+		DBG(CXT, ul_debugobj(cxt, "can't open loop device"));
+		myErrno = ENODEV;
+		rc = -MNT_ERR_LOOPDEV;
+		goto clean_up_out;
+	}
+	if(ioctl(loop_dev_fd, LOOP_SET_FD, backing_fi_fd) < 0) {
+		if(errno == EBUSY && !fixedLoopName) {
+			close(loop_dev_fd);
+			loop_dev_fd = -1;
+			free(pi.loopDevName);
+			pi.loopDevName = NULL;
+			DBG(CXT, ul_debugobj(cxt, "loopdev stolen...trying again"));
+			goto try_again_another_loopdev;
+		}
+		close(loop_dev_fd);
+		loop_dev_fd = -1;
+		DBG(CXT, ul_debugobj(cxt, "loop set-fd ioctl failed"));
+		myErrno = EBUSY;
+		rc = -MNT_ERR_LOOPDEV;
+		goto clean_up_out;
+	}
+
+	memset(&loopinfo, 0, sizeof (loopinfo));
+	strncpy((char *)loopinfo.lo_file_name, pi.loopFileName, LO_NAME_SIZE - 1);
+	loopinfo.lo_file_name[LO_NAME_SIZE - 1] = 0;
+	if(pi.loopEncryptionType)
+		loopinfo.lo_encrypt_type = loDev_crypt_type_fn(pi.loopEncryptionType, &loopinfo.lo_encrypt_key_size, &apiName);
+	loopinfo.lo_offset = offset;
+	loopinfo.lo_sizelimit = sizelimit;
+
+	switch(loopinfo.lo_encrypt_type) {
+	case 0:	  /* LO_CRYPT_NONE */
+		loopinfo.lo_encrypt_key_size = 0;
+		break;
+	case 1:   /* LO_CRYPT_XOR */
+		pass = loDev_sGetPass(cxt, &pi, 1, 0);
+		if(!pass) {
+			myErrno = ENOKEY;
+			goto loop_clr_fd_out;
+		}
+		strncpy((char *)loopinfo.lo_encrypt_key, pass, LO_KEY_SIZE - 1);
+		loopinfo.lo_encrypt_key[LO_KEY_SIZE - 1] = 0;
+		loopinfo.lo_encrypt_key_size = strlen((char*)loopinfo.lo_encrypt_key);
+		break;
+	case 3:   /* LO_CRYPT_FISH2 */
+	case 4:   /* LO_CRYPT_BLOW */
+	case 7:   /* LO_CRYPT_SERPENT */
+	case 8:   /* LO_CRYPT_MARS */
+	case 11:  /* LO_CRYPT_RC6 */
+	case 12:  /* LO_CRYPT_DES_EDE3 */
+	case 16:  /* LO_CRYPT_AES */
+	case 18:  /* LO_CRYPT_CRYPTOAPI */
+		/* set default hash function */
+		hashFunc = __loDev_sha256_hash_buffer;
+		if(loopinfo.lo_encrypt_key_size == 24) hashFunc = __loDev_sha384_hash_buffer;
+		if(loopinfo.lo_encrypt_key_size == 32) hashFunc = __loDev_sha512_hash_buffer;
+		/* possibly override default hash function */
+		if(pi.passHashFuncName) {
+			if(!strcasecmp(pi.passHashFuncName, "sha256")) {
+				hashFunc = __loDev_sha256_hash_buffer;
+			} else if(!strcasecmp(pi.passHashFuncName, "sha384")) {
+				hashFunc = __loDev_sha384_hash_buffer;
+			} else if(!strcasecmp(pi.passHashFuncName, "sha512")) {
+				hashFunc = __loDev_sha512_hash_buffer;
+			} else if(!strcasecmp(pi.passHashFuncName, "rmd160")) {
+				hashFunc = loDev_rmd160HashTwiceWithA;
+				minPassLen = 1;
+			} else if(!strcasecmp(pi.passHashFuncName, "unhashed1")) {
+				hashFunc = loDev_unhashed1_key_setup;
+			} else if(!strcasecmp(pi.passHashFuncName, "unhashed2")) {
+				hashFunc = loDev_unhashed2_key_setup;
+				minPassLen = 1;
+			} else if(!strncasecmp(pi.passHashFuncName, "random", 6) && ((pi.passHashFuncName[6] == 0) || (pi.passHashFuncName[6] == '/'))) {
+				/* random hash type sets up 65 random keys */
+				/* WARNING! DO NOT USE RANDOM HASH TYPE ON PARTITION WITH EXISTING */
+				/* IMPORTANT DATA ON IT. RANDOM HASH TYPE WILL DESTROY YOUR DATA.  */
+				if(loDev_create_random_keys(cxt, pi.loopFileName, loopinfo.lo_offset, loopinfo.lo_sizelimit, cxt->mountflags & MS_RDONLY, &multiKeyBits[0][0])) {
+					myErrno = ENOKEY;
+					goto loop_clr_fd_out;
+				}
+				memcpy(&loopinfo.lo_encrypt_key[0], &multiKeyBits[0][0], sizeof(loopinfo.lo_encrypt_key));
+				run_mkfs_command = pi.multiKeyMode = 1000;
+				break; /* out of switch(loopinfo.lo_encrypt_type) */
+			}
+		}
+		pass = loDev_sGetPass(cxt, &pi, minPassLen, LOOP_PASSWORD_MIN_LENGTH);
+		if(!pass) {
+			myErrno = ENOKEY;
+			goto loop_clr_fd_out;
+		}
+		i = strlen(pass);
+		if(hashFunc == loDev_unhashed1_key_setup) {
+			/* this is for compatibility with historic loop-AES version */
+			loopinfo.lo_encrypt_key_size = 16;             /* 128 bits */
+			if(i >= 32) loopinfo.lo_encrypt_key_size = 24; /* 192 bits */
+			if(i >= 43) loopinfo.lo_encrypt_key_size = 32; /* 256 bits */
+		}
+		(*hashFunc)((unsigned char *)pass, i, &loopinfo.lo_encrypt_key[0], sizeof(loopinfo.lo_encrypt_key));
+		if(pi.multiKeyMode) {
+			int r = 0, t;
+			while(r < pi.multiKeyMode) {
+				t = strlen(pi.multiKeyPass[r]);
+				(*hashFunc)((unsigned char *)pi.multiKeyPass[r], t, &multiKeyBits[r][0], 32);
+				memset(pi.multiKeyPass[r], 0, t);
+				/*
+				 * MultiKeyMode uses md5 IV. One key mode uses sector IV. Sector IV
+				 * and md5 IV v2 and v3 are all computed differently. This first key
+				 * byte XOR with 0x55/0xF4 is needed to cause complete decrypt failure
+				 * in cases where data is encrypted with one type of IV and decrypted
+				 * with another type IV. If identical key was used but only IV was
+				 * computed differently, only first plaintext block of 512 byte CBC
+				 * chain would decrypt incorrectly and rest would decrypt correctly.
+				 * Partially correct decryption is dangerous. Decrypting all blocks
+				 * incorrectly is safer because file system mount will simply fail.
+				 */
+				if(pi.multiKeyMode == 65) {
+					multiKeyBits[r][0] ^= 0xF4; /* version 3 */
+				} else {
+					multiKeyBits[r][0] ^= 0x55; /* version 2 */
+				}
+				r++;
+			}
+		} else if(pi.passIterThousands) {
+			aes_context ctx;
+			unsigned long iter = 0;
+			unsigned char tempkey[32];
+			/*
+			 * Set up AES-256 encryption key using same password and hash function
+			 * as before but with password bit 0 flipped before hashing. That key
+			 * is then used to encrypt actual loop key 'itercountk' thousand times.
+			 */
+			pass[0] ^= 1;
+			(*hashFunc)((unsigned char *)pass, i, &tempkey[0], 32);
+			__loDev_aes_set_key(&ctx, &tempkey[0], 32, 0);
+			sscanf(pi.passIterThousands, "%lu", &iter);
+			iter *= 1000;
+			while(iter > 0) {
+				/* encrypt both 128bit blocks with AES-256 */
+				__loDev_aes_encrypt(&ctx, &loopinfo.lo_encrypt_key[ 0], &loopinfo.lo_encrypt_key[ 0]);
+				__loDev_aes_encrypt(&ctx, &loopinfo.lo_encrypt_key[16], &loopinfo.lo_encrypt_key[16]);
+				/* exchange upper half of first block with lower half of second block */
+				memcpy(&tempkey[0], &loopinfo.lo_encrypt_key[8], 8);
+				memcpy(&loopinfo.lo_encrypt_key[8], &loopinfo.lo_encrypt_key[16], 8);
+				memcpy(&loopinfo.lo_encrypt_key[16], &tempkey[0], 8);
+				iter--;
+			}
+			memset(&ctx, 0, sizeof(ctx));
+			memset(&tempkey[0], 0, sizeof(tempkey));
+		}
+		memset(pass, 0, i);   /* erase original password */
+		break;
+	default:
+		DBG(CXT, ul_debugobj(cxt, "don't know how to set up this type encryption"));
+		myErrno = ENOKEY;
+		goto loop_clr_fd_out;
+	}
+
+	if(pi.loInitValue) {
+		/* cipher modules are free to do whatever they want with this value */
+		i = 0;
+		sscanf(pi.loInitValue, "%d", &i);
+		loopinfo.lo_init[0] = i;
+	}
+
+	/* type 18 == LO_CRYPT_CRYPTOAPI */
+	if ((loopinfo.lo_encrypt_type == 18) || (loDev_set_status64_ioctl(loop_dev_fd, &loopinfo) < 0)) {
+		/* direct cipher interface failed - try CryptoAPI interface now */
+		if(!apiName || (loDev_try_cryptoapi_interface(loop_dev_fd, &loopinfo, apiName) < 0)) {
+			DBG(CXT, ul_debugobj(cxt, "loop set-status ioctl failed"));
+			myErrno = ENOTSUP;
+			loop_clr_fd_out:
+			(void) ioctl(loop_dev_fd, LOOP_CLR_FD, 0);
+			rc = -MNT_ERR_LOOPDEV;
+			goto clean_up_out;
+		}
+	}
+	if(pi.multiKeyMode >= 65) {
+		if(ioctl(loop_dev_fd, LOOP_MULTI_KEY_SETUP_V3, &multiKeyBits[0][0]) < 0) {
+			if(pi.multiKeyMode == 1000) goto try_v2_setup;
+			DBG(CXT, ul_debugobj(cxt, "loop multi-key-v3 ioctl failed"));
+			myErrno = ENOTSUP;
+			goto loop_clr_fd_out;
+		}
+	} else if(pi.multiKeyMode == 64) {
+		try_v2_setup:
+		if((ioctl(loop_dev_fd, LOOP_MULTI_KEY_SETUP, &multiKeyBits[0][0]) < 0) && (pi.multiKeyMode != 1000)) {
+			DBG(CXT, ul_debugobj(cxt, "loop multi-key-v2 ioctl failed"));
+			myErrno = ENOTSUP;
+			goto loop_clr_fd_out;
+		}
+	}
+
+	if(run_mkfs_command && cxt->fs && cxt->fs->fstype && cxt->fs->fstype[0] && (getuid() == 0)) {
+		if(!loDev_fork_mkfs_command(cxt, pi.loopDevName, cxt->fs->fstype)) {
+			/* !strncasecmp(pi.passHashFuncName, "random", 6) test matched */
+			/* This reads octal mode for newly created file system root */
+			/* directory node from '-o phash=random/1777' mount option. */
+			/*                          octal mode--^^^^                */
+			if(sscanf(pi.passHashFuncName + 6, "/%o", &chmodVal) == 1) {
+				/* bits 31...24 set to magic value, so that if something */
+                                /* interprets cxt->loopdev_fd as a file descriptor, it will fail */
+				chmodVal &= 0x00FFFFFF;
+				chmodVal |= 0x77000000;
+			}
+
+		} else {
+			myErrno = ENOMEM;
+			goto loop_clr_fd_out;
+		}
+	}
+
+	rc = mnt_fs_set_source(cxt->fs, pi.loopDevName);
+	if(rc) {
+		myErrno = ENOMEM;
+		goto loop_clr_fd_out;
+	}
+
+skip_setup_ok_out:
+	/* success */
+	cxt->flags |= MNT_FL_LOOPDEV_READY;
+	if(chmodVal) {
+		cxt->loopdev_fd = (int)chmodVal;
+	}
+
+clean_up_out:
+	if(loop_dev_fd != -1) close(loop_dev_fd);
+	if(backing_fi_fd != -1) close(backing_fi_fd);
+
+	memset(loopinfo.lo_encrypt_key, 0, sizeof(loopinfo.lo_encrypt_key));
+	memset(&multiKeyBits[0][0], 0, sizeof(multiKeyBits));
+
+	for(i = 0; i < 66; i++) {
+		if(pi.multiKeyPass[i]) free(pi.multiKeyPass[i]);
+	}
+	if(pi.loopDevName) free(pi.loopDevName);
+	if(pi.loopOffsetBytes) free(pi.loopOffsetBytes);
+	if(pi.loopSizeBytes) free(pi.loopSizeBytes);
+	if(pi.loopEncryptionType) free(pi.loopEncryptionType);
+	if(pi.passSeedString) free(pi.passSeedString);
+	if(pi.passHashFuncName) free(pi.passHashFuncName);
+	if(pi.passIterThousands) free(pi.passIterThousands);
+	if(pi.loInitValue) free(pi.loInitValue);
+	if(pi.gpgKeyFile) free(pi.gpgKeyFile);
+	if(pi.gpgHomeDir) free(pi.gpgHomeDir);
+	if(pi.clearTextKeyFile) free(pi.clearTextKeyFile);
+
+	if(apiName) free(apiName);
+	if(pi.extraPtrToFree) free(pi.extraPtrToFree);
+
+	if(pi.pass_cb_string && cxt->pwd_release_cb) {
+		DBG(CXT, ul_debugobj(cxt, "release pass"));
+		cxt->pwd_release_cb(cxt, pi.pass_cb_string);
+	}
+	if(myErrno) errno = myErrno;
+	return rc;
+}
+
+/*
+ * Deletes loop device
+ */
+int mnt_context_delete_loopdev(struct libmnt_context *cxt)
+{
+	const char *src;
+	int rc = 0, fd;
+
+	assert(cxt);
+	assert(cxt->fs);
+
+	src = mnt_fs_get_srcpath(cxt->fs);
+	if (!src)
+		return -EINVAL;
+
+	if(!loDev_is_loop_device(src))
+		return -EINVAL;
+		
+	sync();
+	if((fd = open(src, O_RDONLY)) < 0) {
+		DBG(CXT, ul_debugobj(cxt, "can't open loop device"));
+		rc = -ENODEV;
+	} else {
+		if(ioctl(fd, LOOP_CLR_FD, 0) < 0) {
+			DBG(CXT, ul_debugobj(cxt, "loop crl-fd ioctl failed"));
+			rc = -EINVAL;
+		}
+		close(fd);
+	}
+	cxt->flags &= ~MNT_FL_LOOPDEV_READY;
+	cxt->loopdev_fd = -1;
+
+	DBG(CXT, ul_debugobj(cxt, "loopdev deleted [rc=%d]", rc));
+	return rc;
+}
+
+/*
+ * Clears loopdev stuff in context, should be called after
+ * failed or successful mount(2).
+ */
+int mnt_context_clear_loopdev(struct libmnt_context *cxt)
+{
+	unsigned int chmodVal;
+
+	assert(cxt);
+
+	if(mnt_context_get_status(cxt) == 0 && (cxt->flags & MNT_FL_LOOPDEV_READY)) {
+		/* mount(2) failed, delete loopdev */
+		mnt_context_delete_loopdev(cxt);
+	} else if(cxt->loopdev_fd != -1) {
+		chmodVal = (unsigned int) cxt->loopdev_fd;
+		if((chmodVal & 0xFF000000) == 0x77000000) { /* check magic value */
+			chmodVal &= 0x00FFFFFF;
+			if(cxt->fs && cxt->fs->target && cxt->fs->target[0]) {
+				/*
+				 * If loop was set up using random keys and new file system
+				 * was created on the loop device, initial permissions for
+				 * file system root directory need to be set here.
+				 */
+				DBG(CXT, ul_debugobj(cxt, "doing chmod() on mountpoint"));
+				if(chmod(cxt->fs->target, chmodVal)) {
+					DBG(CXT, ul_debugobj(cxt, "chmod() on mountpoint failed"));
+				}
+			}
+		}
+	}
+	cxt->loopdev_fd = -1;
+	return 0;
+}
diff -urN util-linux-2.29.2/libmount/src/context_umount.c util-linux-2.29.2-AES/libmount/src/context_umount.c
--- util-linux-2.29.2/libmount/src/context_umount.c	2016-11-02 14:57:31.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/context_umount.c	2017-03-10 17:02:59.000000000 +0200
@@ -303,11 +303,12 @@
  */
 static int is_associated_fs(const char *devname, struct libmnt_fs *fs)
 {
-	uintmax_t offset = 0;
+	int r;
 	const char *src;
 	char *val, *optstr;
 	size_t valsz;
-	int flags = 0;
+	char *offsetStr = NULL, *sizelimitStr = NULL;
+	extern int __loDev_is_loop_active_same_back(char *, char *, char *, char *);
 
 	/* check if it begins with /dev/loop */
 	if (strncmp(devname, _PATH_DEV_LOOP, sizeof(_PATH_DEV_LOOP) - 1))
@@ -319,16 +320,16 @@
 
 	/* check for the offset option in @fs */
 	optstr = (char *) mnt_fs_get_user_options(fs);
-
-	if (optstr &&
-	    mnt_optstr_get_option(optstr, "offset", &val, &valsz) == 0) {
-		flags |= LOOPDEV_FL_OFFSET;
-
-		if (mnt_parse_offset(val, valsz, &offset) != 0)
-			return 0;
-	}
-
-	return loopdev_is_used(devname, src, offset, 0, flags);
+	if (optstr) {
+		if(mnt_optstr_get_option(optstr, "offset", &val, &valsz) == 0 && val && valsz)
+			offsetStr = strndup(val, valsz);
+		if(mnt_optstr_get_option(optstr, "sizelimit", &val, &valsz) == 0 && val && valsz)
+			sizelimitStr = strndup(val, valsz);
+	}
+	r = __loDev_is_loop_active_same_back((char *) devname, (char *) src, offsetStr, sizelimitStr);
+	if(offsetStr) free(offsetStr);
+	if(sizelimitStr) free(sizelimitStr);
+	return r;
 }
 
 static int prepare_helper_from_options(struct libmnt_context *cxt,
@@ -787,7 +788,7 @@
 	if (!rc && mnt_context_is_loopdel(cxt) && cxt->fs) {
 		const char *src = mnt_fs_get_srcpath(cxt->fs);
 
-		if (src && (!is_loopdev(src) || loopdev_is_autoclear(src)))
+		if (src && !is_loopdev(src))
 			mnt_context_enable_loopdel(cxt, FALSE);
 	}
 
diff -urN util-linux-2.29.2/libmount/src/optmap.c util-linux-2.29.2-AES/libmount/src/optmap.c
--- util-linux-2.29.2/libmount/src/optmap.c	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/optmap.c	2017-03-10 17:02:59.000000000 +0200
@@ -161,10 +161,19 @@
    { "comment=", MNT_MS_COMMENT, MNT_NOHLPS | MNT_NOMTAB },/* fstab comment only */
    { "x-",      MNT_MS_XCOMMENT, MNT_NOHLPS | MNT_NOMTAB | MNT_PREFIX }, /* x- options */
 
-   { "loop[=]", MNT_MS_LOOP, MNT_NOHLPS },                             /* use the loop device */
+   { "loop[=]", MNT_MS_LOOP, MNT_NOHLPS },                             /* use the loop device (no MNT_NOMTAB flag) */
    { "offset=", MNT_MS_OFFSET, MNT_NOHLPS | MNT_NOMTAB },		   /* loop device offset */
    { "sizelimit=", MNT_MS_SIZELIMIT, MNT_NOHLPS | MNT_NOMTAB },	   /* loop device size limit */
-   { "encryption=", MNT_MS_ENCRYPTION, MNT_NOHLPS | MNT_NOMTAB },	   /* loop device encryption */
+/* IMPORTANT - make sure that bit numbers below do not conflict with other MNT_MS_* bit numbers in libmount.h.in */
+   { "encryption=",     (1 << 23), MNT_NOHLPS | MNT_NOMTAB },   /* loop device encryption */
+   { "pseed=",		(1 << 24), MNT_NOHLPS | MNT_NOMTAB },	/* loop device passphrase seed */
+   { "phash=",		(1 << 25), MNT_NOHLPS | MNT_NOMTAB },	/* loop device passphrase hash function */
+   { "itercountk=",	(1 << 26), MNT_NOHLPS | MNT_NOMTAB },	/* loop device passphrase iteration count */
+   { "loinit=",		(1 << 27), MNT_NOHLPS | MNT_NOMTAB },	/* loop device initialization code */
+   { "gpgkey=",		(1 << 28), MNT_NOHLPS | MNT_NOMTAB },	/* loop device GnuPG key file */
+   { "gpghome=",	(1 << 29), MNT_NOHLPS | MNT_NOMTAB },	/* loop device GnuPG home directory */
+   { "cleartextkey=",	(1 << 30), MNT_NOHLPS | MNT_NOMTAB },	/* loop device clear text key file */
+/* end IMPORTANT */
 
    { "nofail",  MNT_MS_NOFAIL, MNT_NOMTAB },               /* Do not fail if ENOENT on dev */
 
diff -urN util-linux-2.29.2/libmount/src/rmd160.c util-linux-2.29.2-AES/libmount/src/rmd160.c
--- util-linux-2.29.2/libmount/src/rmd160.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/rmd160.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,532 @@
+/* rmd160.c  -	RIPE-MD160
+ *	Copyright (C) 1998 Free Software Foundation, Inc.
+ */
+
+/* This file was part of GnuPG. Modified for use within the Linux
+ * mount utility by Marc Mutz <Marc@Mutz.com>. None of this code is
+ * by myself. I just removed everything that you don't need when all
+ * you want to do is to use rmd160_hash_buffer().
+ * My comments are marked with (mm).  */
+
+/* GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */
+
+#include <string.h> /* (mm) for memcpy */
+#include <endian.h> /* (mm) for BIG_ENDIAN and BYTE_ORDER */
+#include "rmd160.h"
+
+/* (mm) these are used by the original GnuPG file. In order to modify
+ * that file not too much, we keep the notations. maybe it would be
+ * better to include linux/types.h and typedef __u32 to u32 and __u8
+ * to byte?  */
+typedef unsigned int u32; /* taken from e.g. util-linux's minix.h */
+typedef unsigned char byte;
+
+typedef struct {
+    u32  h0,h1,h2,h3,h4;
+    u32  nblocks;
+    byte buf[64];
+    int  count;
+} RMD160_CONTEXT;
+
+/****************
+ * Rotate a 32 bit integer by n bytes
+ */
+#if defined(__GNUC__) && defined(__i386__)
+static inline u32
+rol( u32 x, int n)
+{
+	__asm__("roll %%cl,%0"
+		:"=r" (x)
+		:"0" (x),"c" (n));
+	return x;
+}
+#else
+  #define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) )
+#endif
+
+/*********************************
+ * RIPEMD-160 is not patented, see (as of 25.10.97)
+ *   http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html
+ * Note that the code uses Little Endian byteorder, which is good for
+ * 386 etc, but we must add some conversion when used on a big endian box.
+ *
+ *
+ * Pseudo-code for RIPEMD-160
+ *
+ * RIPEMD-160 is an iterative hash function that operates on 32-bit words.
+ * The round function takes as input a 5-word chaining variable and a 16-word
+ * message block and maps this to a new chaining variable. All operations are
+ * defined on 32-bit words. Padding is identical to that of MD4.
+ *
+ *
+ * RIPEMD-160: definitions
+ *
+ *
+ *   nonlinear functions at bit level: exor, mux, -, mux, -
+ *
+ *   f(j, x, y, z) = x XOR y XOR z		  (0 <= j <= 15)
+ *   f(j, x, y, z) = (x AND y) OR (NOT(x) AND z)  (16 <= j <= 31)
+ *   f(j, x, y, z) = (x OR NOT(y)) XOR z	  (32 <= j <= 47)
+ *   f(j, x, y, z) = (x AND z) OR (y AND NOT(z))  (48 <= j <= 63)
+ *   f(j, x, y, z) = x XOR (y OR NOT(z))	  (64 <= j <= 79)
+ *
+ *
+ *   added constants (hexadecimal)
+ *
+ *   K(j) = 0x00000000	    (0 <= j <= 15)
+ *   K(j) = 0x5A827999	   (16 <= j <= 31)	int(2**30 x sqrt(2))
+ *   K(j) = 0x6ED9EBA1	   (32 <= j <= 47)	int(2**30 x sqrt(3))
+ *   K(j) = 0x8F1BBCDC	   (48 <= j <= 63)	int(2**30 x sqrt(5))
+ *   K(j) = 0xA953FD4E	   (64 <= j <= 79)	int(2**30 x sqrt(7))
+ *   K'(j) = 0x50A28BE6     (0 <= j <= 15)      int(2**30 x cbrt(2))
+ *   K'(j) = 0x5C4DD124    (16 <= j <= 31)      int(2**30 x cbrt(3))
+ *   K'(j) = 0x6D703EF3    (32 <= j <= 47)      int(2**30 x cbrt(5))
+ *   K'(j) = 0x7A6D76E9    (48 <= j <= 63)      int(2**30 x cbrt(7))
+ *   K'(j) = 0x00000000    (64 <= j <= 79)
+ *
+ *
+ *   selection of message word
+ *
+ *   r(j)      = j		      (0 <= j <= 15)
+ *   r(16..31) = 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8
+ *   r(32..47) = 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12
+ *   r(48..63) = 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2
+ *   r(64..79) = 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
+ *   r0(0..15) = 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12
+ *   r0(16..31)= 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2
+ *   r0(32..47)= 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13
+ *   r0(48..63)= 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14
+ *   r0(64..79)= 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
+ *
+ *
+ *   amount for rotate left (rol)
+ *
+ *   s(0..15)  = 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8
+ *   s(16..31) = 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12
+ *   s(32..47) = 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5
+ *   s(48..63) = 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12
+ *   s(64..79) = 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
+ *   s'(0..15) = 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6
+ *   s'(16..31)= 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11
+ *   s'(32..47)= 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5
+ *   s'(48..63)= 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8
+ *   s'(64..79)= 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
+ *
+ *
+ *   initial value (hexadecimal)
+ *
+ *   h0 = 0x67452301; h1 = 0xEFCDAB89; h2 = 0x98BADCFE; h3 = 0x10325476;
+ *							h4 = 0xC3D2E1F0;
+ *
+ *
+ * RIPEMD-160: pseudo-code
+ *
+ *   It is assumed that the message after padding consists of t 16-word blocks
+ *   that will be denoted with X[i][j], with 0 <= i <= t-1 and 0 <= j <= 15.
+ *   The symbol [+] denotes addition modulo 2**32 and rol_s denotes cyclic left
+ *   shift (rotate) over s positions.
+ *
+ *
+ *   for i := 0 to t-1 {
+ *	 A := h0; B := h1; C := h2; D = h3; E = h4;
+ *	 A' := h0; B' := h1; C' := h2; D' = h3; E' = h4;
+ *	 for j := 0 to 79 {
+ *	     T := rol_s(j)(A [+] f(j, B, C, D) [+] X[i][r(j)] [+] K(j)) [+] E;
+ *	     A := E; E := D; D := rol_10(C); C := B; B := T;
+ *	     T := rol_s'(j)(A' [+] f(79-j, B', C', D') [+] X[i][r'(j)]
+						       [+] K'(j)) [+] E';
+ *	     A' := E'; E' := D'; D' := rol_10(C'); C' := B'; B' := T;
+ *	 }
+ *	 T := h1 [+] C [+] D'; h1 := h2 [+] D [+] E'; h2 := h3 [+] E [+] A';
+ *	 h3 := h4 [+] A [+] B'; h4 := h0 [+] B [+] C'; h0 := T;
+ *   }
+ */
+
+/* Some examples:
+ * ""                    9c1185a5c5e9fc54612808977ee8f548b2258d31
+ * "a"                   0bdc9d2d256b3ee9daae347be6f4dc835a467ffe
+ * "abc"                 8eb208f7e05d987a9b044a8e98c6b087f15a0bfc
+ * "message digest"      5d0689ef49d2fae572b881b123a85ffa21595f36
+ * "a...z"               f71c27109c692c1b56bbdceb5b9d2865b3708dbc
+ * "abcdbcde...nopq"     12a053384a9c0c88e405a06c27dcf49ada62eb2b
+ * "A...Za...z0...9"     b0e20b6e3116640286ed3a87a5713079b21f5189
+ * 8 times "1234567890"  9b752e45573d4b39f4dbd3323cab82bf63326bfb
+ * 1 million times "a"   52783243c1697bdbe16d37f97f68f08325dc1528
+ */
+
+
+static void
+rmd160_init( RMD160_CONTEXT *hd )
+{
+    hd->h0 = 0x67452301;
+    hd->h1 = 0xEFCDAB89;
+    hd->h2 = 0x98BADCFE;
+    hd->h3 = 0x10325476;
+    hd->h4 = 0xC3D2E1F0;
+    hd->nblocks = 0;
+    hd->count = 0;
+}
+
+
+
+/****************
+ * Transform the message X which consists of 16 32-bit-words
+ */
+static void
+transform( RMD160_CONTEXT *hd, byte *data )
+{
+    u32 a,b,c,d,e,aa,bb,cc,dd,ee,t;
+  #if BYTE_ORDER == BIG_ENDIAN
+    u32 x[16];
+    { int i;
+      byte *p2, *p1;
+      for(i=0, p1=data, p2=(byte*)x; i < 16; i++, p2 += 4 ) {
+	p2[3] = *p1++;
+	p2[2] = *p1++;
+	p2[1] = *p1++;
+	p2[0] = *p1++;
+      }
+    }
+  #else
+   #if 0
+    u32 *x =(u32*)data;
+   #else
+    /* this version is better because it is always aligned;
+     * The performance penalty on a 586-100 is about 6% which
+     * is acceptable - because the data is more local it might
+     * also be possible that this is faster on some machines.
+     * This function (when compiled with -02 on gcc 2.7.2)
+     * executes on a 586-100 (39.73 bogomips) at about 1900kb/sec;
+     * [measured with a 4MB data and "gpgm --print-md rmd160"] */
+    u32 x[16];
+    memcpy( x, data, 64 );
+   #endif
+  #endif
+
+
+#define K0  0x00000000
+#define K1  0x5A827999
+#define K2  0x6ED9EBA1
+#define K3  0x8F1BBCDC
+#define K4  0xA953FD4E
+#define KK0 0x50A28BE6
+#define KK1 0x5C4DD124
+#define KK2 0x6D703EF3
+#define KK3 0x7A6D76E9
+#define KK4 0x00000000
+#define F0(x,y,z)   ( (x) ^ (y) ^ (z) )
+#define F1(x,y,z)   ( ((x) & (y)) | (~(x) & (z)) )
+#define F2(x,y,z)   ( ((x) | ~(y)) ^ (z) )
+#define F3(x,y,z)   ( ((x) & (z)) | ((y) & ~(z)) )
+#define F4(x,y,z)   ( (x) ^ ((y) | ~(z)) )
+#define R(a,b,c,d,e,f,k,r,s) do { t = a + f(b,c,d) + k + x[r]; \
+				  a = rol(t,s) + e;	       \
+				  c = rol(c,10);	       \
+				} while(0)
+
+    /* left lane */
+    a = hd->h0;
+    b = hd->h1;
+    c = hd->h2;
+    d = hd->h3;
+    e = hd->h4;
+    R( a, b, c, d, e, F0, K0,  0, 11 );
+    R( e, a, b, c, d, F0, K0,  1, 14 );
+    R( d, e, a, b, c, F0, K0,  2, 15 );
+    R( c, d, e, a, b, F0, K0,  3, 12 );
+    R( b, c, d, e, a, F0, K0,  4,  5 );
+    R( a, b, c, d, e, F0, K0,  5,  8 );
+    R( e, a, b, c, d, F0, K0,  6,  7 );
+    R( d, e, a, b, c, F0, K0,  7,  9 );
+    R( c, d, e, a, b, F0, K0,  8, 11 );
+    R( b, c, d, e, a, F0, K0,  9, 13 );
+    R( a, b, c, d, e, F0, K0, 10, 14 );
+    R( e, a, b, c, d, F0, K0, 11, 15 );
+    R( d, e, a, b, c, F0, K0, 12,  6 );
+    R( c, d, e, a, b, F0, K0, 13,  7 );
+    R( b, c, d, e, a, F0, K0, 14,  9 );
+    R( a, b, c, d, e, F0, K0, 15,  8 );
+    R( e, a, b, c, d, F1, K1,  7,  7 );
+    R( d, e, a, b, c, F1, K1,  4,  6 );
+    R( c, d, e, a, b, F1, K1, 13,  8 );
+    R( b, c, d, e, a, F1, K1,  1, 13 );
+    R( a, b, c, d, e, F1, K1, 10, 11 );
+    R( e, a, b, c, d, F1, K1,  6,  9 );
+    R( d, e, a, b, c, F1, K1, 15,  7 );
+    R( c, d, e, a, b, F1, K1,  3, 15 );
+    R( b, c, d, e, a, F1, K1, 12,  7 );
+    R( a, b, c, d, e, F1, K1,  0, 12 );
+    R( e, a, b, c, d, F1, K1,  9, 15 );
+    R( d, e, a, b, c, F1, K1,  5,  9 );
+    R( c, d, e, a, b, F1, K1,  2, 11 );
+    R( b, c, d, e, a, F1, K1, 14,  7 );
+    R( a, b, c, d, e, F1, K1, 11, 13 );
+    R( e, a, b, c, d, F1, K1,  8, 12 );
+    R( d, e, a, b, c, F2, K2,  3, 11 );
+    R( c, d, e, a, b, F2, K2, 10, 13 );
+    R( b, c, d, e, a, F2, K2, 14,  6 );
+    R( a, b, c, d, e, F2, K2,  4,  7 );
+    R( e, a, b, c, d, F2, K2,  9, 14 );
+    R( d, e, a, b, c, F2, K2, 15,  9 );
+    R( c, d, e, a, b, F2, K2,  8, 13 );
+    R( b, c, d, e, a, F2, K2,  1, 15 );
+    R( a, b, c, d, e, F2, K2,  2, 14 );
+    R( e, a, b, c, d, F2, K2,  7,  8 );
+    R( d, e, a, b, c, F2, K2,  0, 13 );
+    R( c, d, e, a, b, F2, K2,  6,  6 );
+    R( b, c, d, e, a, F2, K2, 13,  5 );
+    R( a, b, c, d, e, F2, K2, 11, 12 );
+    R( e, a, b, c, d, F2, K2,  5,  7 );
+    R( d, e, a, b, c, F2, K2, 12,  5 );
+    R( c, d, e, a, b, F3, K3,  1, 11 );
+    R( b, c, d, e, a, F3, K3,  9, 12 );
+    R( a, b, c, d, e, F3, K3, 11, 14 );
+    R( e, a, b, c, d, F3, K3, 10, 15 );
+    R( d, e, a, b, c, F3, K3,  0, 14 );
+    R( c, d, e, a, b, F3, K3,  8, 15 );
+    R( b, c, d, e, a, F3, K3, 12,  9 );
+    R( a, b, c, d, e, F3, K3,  4,  8 );
+    R( e, a, b, c, d, F3, K3, 13,  9 );
+    R( d, e, a, b, c, F3, K3,  3, 14 );
+    R( c, d, e, a, b, F3, K3,  7,  5 );
+    R( b, c, d, e, a, F3, K3, 15,  6 );
+    R( a, b, c, d, e, F3, K3, 14,  8 );
+    R( e, a, b, c, d, F3, K3,  5,  6 );
+    R( d, e, a, b, c, F3, K3,  6,  5 );
+    R( c, d, e, a, b, F3, K3,  2, 12 );
+    R( b, c, d, e, a, F4, K4,  4,  9 );
+    R( a, b, c, d, e, F4, K4,  0, 15 );
+    R( e, a, b, c, d, F4, K4,  5,  5 );
+    R( d, e, a, b, c, F4, K4,  9, 11 );
+    R( c, d, e, a, b, F4, K4,  7,  6 );
+    R( b, c, d, e, a, F4, K4, 12,  8 );
+    R( a, b, c, d, e, F4, K4,  2, 13 );
+    R( e, a, b, c, d, F4, K4, 10, 12 );
+    R( d, e, a, b, c, F4, K4, 14,  5 );
+    R( c, d, e, a, b, F4, K4,  1, 12 );
+    R( b, c, d, e, a, F4, K4,  3, 13 );
+    R( a, b, c, d, e, F4, K4,  8, 14 );
+    R( e, a, b, c, d, F4, K4, 11, 11 );
+    R( d, e, a, b, c, F4, K4,  6,  8 );
+    R( c, d, e, a, b, F4, K4, 15,  5 );
+    R( b, c, d, e, a, F4, K4, 13,  6 );
+
+    aa = a; bb = b; cc = c; dd = d; ee = e;
+
+    /* right lane */
+    a = hd->h0;
+    b = hd->h1;
+    c = hd->h2;
+    d = hd->h3;
+    e = hd->h4;
+    R( a, b, c, d, e, F4, KK0,	5,  8);
+    R( e, a, b, c, d, F4, KK0, 14,  9);
+    R( d, e, a, b, c, F4, KK0,	7,  9);
+    R( c, d, e, a, b, F4, KK0,	0, 11);
+    R( b, c, d, e, a, F4, KK0,	9, 13);
+    R( a, b, c, d, e, F4, KK0,	2, 15);
+    R( e, a, b, c, d, F4, KK0, 11, 15);
+    R( d, e, a, b, c, F4, KK0,	4,  5);
+    R( c, d, e, a, b, F4, KK0, 13,  7);
+    R( b, c, d, e, a, F4, KK0,	6,  7);
+    R( a, b, c, d, e, F4, KK0, 15,  8);
+    R( e, a, b, c, d, F4, KK0,	8, 11);
+    R( d, e, a, b, c, F4, KK0,	1, 14);
+    R( c, d, e, a, b, F4, KK0, 10, 14);
+    R( b, c, d, e, a, F4, KK0,	3, 12);
+    R( a, b, c, d, e, F4, KK0, 12,  6);
+    R( e, a, b, c, d, F3, KK1,	6,  9);
+    R( d, e, a, b, c, F3, KK1, 11, 13);
+    R( c, d, e, a, b, F3, KK1,	3, 15);
+    R( b, c, d, e, a, F3, KK1,	7,  7);
+    R( a, b, c, d, e, F3, KK1,	0, 12);
+    R( e, a, b, c, d, F3, KK1, 13,  8);
+    R( d, e, a, b, c, F3, KK1,	5,  9);
+    R( c, d, e, a, b, F3, KK1, 10, 11);
+    R( b, c, d, e, a, F3, KK1, 14,  7);
+    R( a, b, c, d, e, F3, KK1, 15,  7);
+    R( e, a, b, c, d, F3, KK1,	8, 12);
+    R( d, e, a, b, c, F3, KK1, 12,  7);
+    R( c, d, e, a, b, F3, KK1,	4,  6);
+    R( b, c, d, e, a, F3, KK1,	9, 15);
+    R( a, b, c, d, e, F3, KK1,	1, 13);
+    R( e, a, b, c, d, F3, KK1,	2, 11);
+    R( d, e, a, b, c, F2, KK2, 15,  9);
+    R( c, d, e, a, b, F2, KK2,	5,  7);
+    R( b, c, d, e, a, F2, KK2,	1, 15);
+    R( a, b, c, d, e, F2, KK2,	3, 11);
+    R( e, a, b, c, d, F2, KK2,	7,  8);
+    R( d, e, a, b, c, F2, KK2, 14,  6);
+    R( c, d, e, a, b, F2, KK2,	6,  6);
+    R( b, c, d, e, a, F2, KK2,	9, 14);
+    R( a, b, c, d, e, F2, KK2, 11, 12);
+    R( e, a, b, c, d, F2, KK2,	8, 13);
+    R( d, e, a, b, c, F2, KK2, 12,  5);
+    R( c, d, e, a, b, F2, KK2,	2, 14);
+    R( b, c, d, e, a, F2, KK2, 10, 13);
+    R( a, b, c, d, e, F2, KK2,	0, 13);
+    R( e, a, b, c, d, F2, KK2,	4,  7);
+    R( d, e, a, b, c, F2, KK2, 13,  5);
+    R( c, d, e, a, b, F1, KK3,	8, 15);
+    R( b, c, d, e, a, F1, KK3,	6,  5);
+    R( a, b, c, d, e, F1, KK3,	4,  8);
+    R( e, a, b, c, d, F1, KK3,	1, 11);
+    R( d, e, a, b, c, F1, KK3,	3, 14);
+    R( c, d, e, a, b, F1, KK3, 11, 14);
+    R( b, c, d, e, a, F1, KK3, 15,  6);
+    R( a, b, c, d, e, F1, KK3,	0, 14);
+    R( e, a, b, c, d, F1, KK3,	5,  6);
+    R( d, e, a, b, c, F1, KK3, 12,  9);
+    R( c, d, e, a, b, F1, KK3,	2, 12);
+    R( b, c, d, e, a, F1, KK3, 13,  9);
+    R( a, b, c, d, e, F1, KK3,	9, 12);
+    R( e, a, b, c, d, F1, KK3,	7,  5);
+    R( d, e, a, b, c, F1, KK3, 10, 15);
+    R( c, d, e, a, b, F1, KK3, 14,  8);
+    R( b, c, d, e, a, F0, KK4, 12,  8);
+    R( a, b, c, d, e, F0, KK4, 15,  5);
+    R( e, a, b, c, d, F0, KK4, 10, 12);
+    R( d, e, a, b, c, F0, KK4,	4,  9);
+    R( c, d, e, a, b, F0, KK4,	1, 12);
+    R( b, c, d, e, a, F0, KK4,	5,  5);
+    R( a, b, c, d, e, F0, KK4,	8, 14);
+    R( e, a, b, c, d, F0, KK4,	7,  6);
+    R( d, e, a, b, c, F0, KK4,	6,  8);
+    R( c, d, e, a, b, F0, KK4,	2, 13);
+    R( b, c, d, e, a, F0, KK4, 13,  6);
+    R( a, b, c, d, e, F0, KK4, 14,  5);
+    R( e, a, b, c, d, F0, KK4,	0, 15);
+    R( d, e, a, b, c, F0, KK4,	3, 13);
+    R( c, d, e, a, b, F0, KK4,	9, 11);
+    R( b, c, d, e, a, F0, KK4, 11, 11);
+
+
+    t	   = hd->h1 + d + cc;
+    hd->h1 = hd->h2 + e + dd;
+    hd->h2 = hd->h3 + a + ee;
+    hd->h3 = hd->h4 + b + aa;
+    hd->h4 = hd->h0 + c + bb;
+    hd->h0 = t;
+}
+
+
+/* Update the message digest with the contents
+ * of INBUF with length INLEN.
+ */
+static void
+rmd160_write( RMD160_CONTEXT *hd, byte *inbuf, size_t inlen)
+{
+    if( hd->count == 64 ) { /* flush the buffer */
+	transform( hd, hd->buf );
+	hd->count = 0;
+	hd->nblocks++;
+    }
+    if( !inbuf )
+	return;
+    if( hd->count ) {
+	for( ; inlen && hd->count < 64; inlen-- )
+	    hd->buf[hd->count++] = *inbuf++;
+	rmd160_write( hd, NULL, 0 );
+	if( !inlen )
+	    return;
+    }
+
+    while( inlen >= 64 ) {
+	transform( hd, inbuf );
+	hd->count = 0;
+	hd->nblocks++;
+	inlen -= 64;
+	inbuf += 64;
+    }
+    for( ; inlen && hd->count < 64; inlen-- )
+	hd->buf[hd->count++] = *inbuf++;
+}
+
+/* The routine terminates the computation
+ */
+
+static void
+rmd160_final( RMD160_CONTEXT *hd )
+{
+    u32 t, msb, lsb;
+    byte *p;
+
+    rmd160_write(hd, NULL, 0); /* flush */;
+
+    msb = 0;
+    t = hd->nblocks;
+    if( (lsb = t << 6) < t ) /* multiply by 64 to make a byte count */
+	msb++;
+    msb += t >> 26;
+    t = lsb;
+    if( (lsb = t + hd->count) < t ) /* add the count */
+	msb++;
+    t = lsb;
+    if( (lsb = t << 3) < t ) /* multiply by 8 to make a bit count */
+	msb++;
+    msb += t >> 29;
+
+    if( hd->count < 56 ) { /* enough room */
+	hd->buf[hd->count++] = 0x80; /* pad */
+	while( hd->count < 56 )
+	    hd->buf[hd->count++] = 0;  /* pad */
+    }
+    else { /* need one extra block */
+	hd->buf[hd->count++] = 0x80; /* pad character */
+	while( hd->count < 64 )
+	    hd->buf[hd->count++] = 0;
+	rmd160_write(hd, NULL, 0);  /* flush */;
+	memset(hd->buf, 0, 56 ); /* fill next block with zeroes */
+    }
+    /* append the 64 bit count */
+    hd->buf[56] = lsb	   ;
+    hd->buf[57] = lsb >>  8;
+    hd->buf[58] = lsb >> 16;
+    hd->buf[59] = lsb >> 24;
+    hd->buf[60] = msb	   ;
+    hd->buf[61] = msb >>  8;
+    hd->buf[62] = msb >> 16;
+    hd->buf[63] = msb >> 24;
+    transform( hd, hd->buf );
+
+    p = hd->buf;
+  #if BYTE_ORDER == BIG_ENDIAN
+    #define X(a) do { *p++ = hd->h##a	   ; *p++ = hd->h##a >> 8;	\
+		      *p++ = hd->h##a >> 16; *p++ = hd->h##a >> 24; } while(0)
+  #else /* little endian */
+    #define X(a) do { *(u32*)p = hd->h##a ; p += 4; } while(0)
+  #endif
+    X(0);
+    X(1);
+    X(2);
+    X(3);
+    X(4);
+  #undef X
+}
+
+/****************
+ * Shortcut functions which puts the hash value of the supplied buffer
+ * into outbuf which must have a size of 20 bytes.
+ */
+void
+__loDev_rmd160_hash_buffer( char *outbuf, const char *buffer, size_t length )
+{
+    RMD160_CONTEXT hd;
+
+    rmd160_init( &hd );
+    rmd160_write( &hd, (byte*)buffer, length );
+    rmd160_final( &hd );
+    memcpy( outbuf, hd.buf, 20 );
+}
diff -urN util-linux-2.29.2/libmount/src/rmd160.h util-linux-2.29.2-AES/libmount/src/rmd160.h
--- util-linux-2.29.2/libmount/src/rmd160.h	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/rmd160.h	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,9 @@
+#ifndef RMD160_H
+#define RMD160_H
+
+void
+__loDev_rmd160_hash_buffer( char *outbuf, const char *buffer, size_t length );
+
+#endif /*RMD160_H*/
+
+
diff -urN util-linux-2.29.2/libmount/src/sha512.c util-linux-2.29.2-AES/libmount/src/sha512.c
--- util-linux-2.29.2/libmount/src/sha512.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/sha512.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,432 @@
+/*
+ *  sha512.c
+ *
+ *  Written by Jari Ruusu, April 16 2001
+ *
+ *  Copyright 2001 by Jari Ruusu.
+ *  Redistribution of this file is permitted under the GNU Public License.
+ */
+
+#include <string.h>
+#include <sys/types.h>
+#include "sha512.h"
+
+/* Define one or more of these. If none is defined, you get all of them */
+#if !defined(SHA256_NEEDED)&&!defined(SHA512_NEEDED)&&!defined(SHA384_NEEDED)
+# define SHA256_NEEDED  1
+# define SHA512_NEEDED  1
+# define SHA384_NEEDED  1
+#endif
+
+#if defined(SHA256_NEEDED)
+static const u_int32_t sha256_hashInit[8] = {
+    0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c,
+    0x1f83d9ab, 0x5be0cd19
+};
+static const u_int32_t sha256_K[64] = {
+    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
+    0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
+    0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
+    0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
+    0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
+    0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
+    0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
+    0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
+    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+};
+#endif
+
+#if defined(SHA512_NEEDED)
+static const u_int64_t sha512_hashInit[8] = {
+    0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL,
+    0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
+    0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
+};
+#endif
+
+#if defined(SHA384_NEEDED)
+static const u_int64_t sha384_hashInit[8] = {
+    0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL, 0x9159015a3070dd17ULL,
+    0x152fecd8f70e5939ULL, 0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL,
+    0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL
+};
+#endif
+
+#if defined(SHA512_NEEDED) || defined(SHA384_NEEDED)
+static const u_int64_t sha512_K[80] = {
+    0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
+    0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
+    0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
+    0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+    0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
+    0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
+    0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
+    0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+    0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
+    0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
+    0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
+    0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+    0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
+    0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
+    0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
+    0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+    0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
+    0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
+    0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
+    0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+    0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
+    0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
+    0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
+    0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+    0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
+    0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
+    0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
+};
+#endif
+
+#define Ch(x,y,z)   (((x) & (y)) ^ ((~(x)) & (z)))
+#define Maj(x,y,z)  (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
+#define R(x,y)      ((y) >> (x))
+
+#if defined(SHA256_NEEDED)
+void __loDev_sha256_init(sha256_context *ctx)
+{
+    memcpy(&ctx->sha_H[0], &sha256_hashInit[0], sizeof(ctx->sha_H));
+    ctx->sha_blocks = 0;
+    ctx->sha_bufCnt = 0;
+}
+
+#define S(x,y)      (((y) >> (x)) | ((y) << (32 - (x))))
+#define uSig0(x)    ((S(2,(x))) ^ (S(13,(x))) ^ (S(22,(x))))
+#define uSig1(x)    ((S(6,(x))) ^ (S(11,(x))) ^ (S(25,(x))))
+#define lSig0(x)    ((S(7,(x))) ^ (S(18,(x))) ^ (R(3,(x))))
+#define lSig1(x)    ((S(17,(x))) ^ (S(19,(x))) ^ (R(10,(x))))
+
+static void sha256_transform(sha256_context *ctx, unsigned char *datap)
+{
+    register int    j;
+    u_int32_t       a, b, c, d, e, f, g, h;
+    u_int32_t       T1, T2, W[64], Wm2, Wm15;
+
+    /* read the data, big endian byte order */
+    j = 0;
+    do {
+        W[j] = (((u_int32_t)(datap[0]))<<24) | (((u_int32_t)(datap[1]))<<16) |
+               (((u_int32_t)(datap[2]))<<8 ) | ((u_int32_t)(datap[3]));
+        datap += 4;
+    } while(++j < 16);
+    
+    /* initialize variables a...h */
+    a = ctx->sha_H[0];
+    b = ctx->sha_H[1];
+    c = ctx->sha_H[2];
+    d = ctx->sha_H[3];
+    e = ctx->sha_H[4];
+    f = ctx->sha_H[5];
+    g = ctx->sha_H[6];
+    h = ctx->sha_H[7];
+
+    /* apply compression function */
+    j = 0;
+    do {
+        if(j >= 16) {
+            Wm2 = W[j - 2];
+            Wm15 = W[j - 15];
+            W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16];
+        }
+        T1 = h + uSig1(e) + Ch(e,f,g) + sha256_K[j] + W[j];
+        T2 = uSig0(a) + Maj(a,b,c);
+        h = g; g = f; f = e;
+        e = d + T1;
+        d = c; c = b; b = a;
+        a = T1 + T2;
+    } while(++j < 64);
+
+    /* compute intermediate hash value */
+    ctx->sha_H[0] += a;
+    ctx->sha_H[1] += b;
+    ctx->sha_H[2] += c;
+    ctx->sha_H[3] += d;
+    ctx->sha_H[4] += e;
+    ctx->sha_H[5] += f;
+    ctx->sha_H[6] += g;
+    ctx->sha_H[7] += h;
+
+    ctx->sha_blocks++;
+}
+
+void __loDev_sha256_write(sha256_context *ctx, unsigned char *datap, int length)
+{
+    while(length > 0) {
+        if(!ctx->sha_bufCnt) {
+            while(length >= (int) sizeof(ctx->sha_out)) {
+                sha256_transform(ctx, datap);
+                datap += sizeof(ctx->sha_out);
+                length -= sizeof(ctx->sha_out);
+            }
+            if(!length) return;
+        }
+        ctx->sha_out[ctx->sha_bufCnt] = *datap++;
+        length--;
+        if(++ctx->sha_bufCnt == sizeof(ctx->sha_out)) {
+            sha256_transform(ctx, &ctx->sha_out[0]);
+            ctx->sha_bufCnt = 0;
+        }
+    }
+}
+
+void __loDev_sha256_final(sha256_context *ctx)
+{
+    register int    j;
+    u_int64_t       bitLength;
+    u_int32_t       i;
+    unsigned char   padByte, *datap;
+
+    bitLength = (ctx->sha_blocks << 9) | (ctx->sha_bufCnt << 3);
+    padByte = 0x80;
+    __loDev_sha256_write(ctx, &padByte, 1);
+
+    /* pad extra space with zeroes */
+    padByte = 0;
+    while(ctx->sha_bufCnt != 56) {
+        __loDev_sha256_write(ctx, &padByte, 1);
+    }
+
+    /* write bit length, big endian byte order */
+    ctx->sha_out[56] = bitLength >> 56;
+    ctx->sha_out[57] = bitLength >> 48;
+    ctx->sha_out[58] = bitLength >> 40;
+    ctx->sha_out[59] = bitLength >> 32;
+    ctx->sha_out[60] = bitLength >> 24;
+    ctx->sha_out[61] = bitLength >> 16;
+    ctx->sha_out[62] = bitLength >> 8;
+    ctx->sha_out[63] = bitLength;
+    sha256_transform(ctx, &ctx->sha_out[0]);
+    
+    /* return results in ctx->sha_out[0...31] */
+    datap = &ctx->sha_out[0];
+    j = 0;
+    do {
+        i = ctx->sha_H[j];
+        datap[0] = i >> 24;
+        datap[1] = i >> 16;
+        datap[2] = i >> 8;
+        datap[3] = i;
+        datap += 4;
+    } while(++j < 8);
+
+    /* clear sensitive information */
+    memset(&ctx->sha_out[32], 0, sizeof(sha256_context) - 32);
+}
+
+void __loDev_sha256_hash_buffer(unsigned char *ib, int ile, unsigned char *ob, int ole)
+{
+    sha256_context ctx;
+
+    if(ole < 1) return;
+    memset(ob, 0, ole);
+    if(ole > 32) ole = 32;
+    __loDev_sha256_init(&ctx);
+    __loDev_sha256_write(&ctx, ib, ile);
+    __loDev_sha256_final(&ctx);
+    memcpy(ob, &ctx.sha_out[0], ole);
+    memset(&ctx, 0, sizeof(ctx));
+}
+
+#endif
+
+#if defined(SHA512_NEEDED)
+void __loDev_sha512_init(sha512_context *ctx)
+{
+    memcpy(&ctx->sha_H[0], &sha512_hashInit[0], sizeof(ctx->sha_H));
+    ctx->sha_blocks = 0;
+    ctx->sha_blocksMSB = 0;
+    ctx->sha_bufCnt = 0;
+}
+#endif
+
+#if defined(SHA512_NEEDED) || defined(SHA384_NEEDED)
+#undef S
+#undef uSig0
+#undef uSig1
+#undef lSig0
+#undef lSig1
+#define S(x,y)      (((y) >> (x)) | ((y) << (64 - (x))))
+#define uSig0(x)    ((S(28,(x))) ^ (S(34,(x))) ^ (S(39,(x))))
+#define uSig1(x)    ((S(14,(x))) ^ (S(18,(x))) ^ (S(41,(x))))
+#define lSig0(x)    ((S(1,(x))) ^ (S(8,(x))) ^ (R(7,(x))))
+#define lSig1(x)    ((S(19,(x))) ^ (S(61,(x))) ^ (R(6,(x))))
+
+static void sha512_transform(sha512_context *ctx, unsigned char *datap)
+{
+    register int    j;
+    u_int64_t       a, b, c, d, e, f, g, h;
+    u_int64_t       T1, T2, W[80], Wm2, Wm15;
+
+    /* read the data, big endian byte order */
+    j = 0;
+    do {
+        W[j] = (((u_int64_t)(datap[0]))<<56) | (((u_int64_t)(datap[1]))<<48) |
+               (((u_int64_t)(datap[2]))<<40) | (((u_int64_t)(datap[3]))<<32) |
+               (((u_int64_t)(datap[4]))<<24) | (((u_int64_t)(datap[5]))<<16) |
+               (((u_int64_t)(datap[6]))<<8 ) | ((u_int64_t)(datap[7]));
+        datap += 8;
+    } while(++j < 16);
+    
+    /* initialize variables a...h */
+    a = ctx->sha_H[0];
+    b = ctx->sha_H[1];
+    c = ctx->sha_H[2];
+    d = ctx->sha_H[3];
+    e = ctx->sha_H[4];
+    f = ctx->sha_H[5];
+    g = ctx->sha_H[6];
+    h = ctx->sha_H[7];
+
+    /* apply compression function */
+    j = 0;
+    do {
+        if(j >= 16) {
+            Wm2 = W[j - 2];
+            Wm15 = W[j - 15];
+            W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16];
+        }
+        T1 = h + uSig1(e) + Ch(e,f,g) + sha512_K[j] + W[j];
+        T2 = uSig0(a) + Maj(a,b,c);
+        h = g; g = f; f = e;
+        e = d + T1;
+        d = c; c = b; b = a;
+        a = T1 + T2;
+    } while(++j < 80);
+
+    /* compute intermediate hash value */
+    ctx->sha_H[0] += a;
+    ctx->sha_H[1] += b;
+    ctx->sha_H[2] += c;
+    ctx->sha_H[3] += d;
+    ctx->sha_H[4] += e;
+    ctx->sha_H[5] += f;
+    ctx->sha_H[6] += g;
+    ctx->sha_H[7] += h;
+
+    ctx->sha_blocks++;
+    if(!ctx->sha_blocks) ctx->sha_blocksMSB++;
+}
+
+void __loDev_sha512_write(sha512_context *ctx, unsigned char *datap, int length)
+{
+    while(length > 0) {
+        if(!ctx->sha_bufCnt) {
+            while(length >= (int) sizeof(ctx->sha_out)) {
+                sha512_transform(ctx, datap);
+                datap += sizeof(ctx->sha_out);
+                length -= sizeof(ctx->sha_out);
+            }
+            if(!length) return;
+        }
+        ctx->sha_out[ctx->sha_bufCnt] = *datap++;
+        length--;
+        if(++ctx->sha_bufCnt == sizeof(ctx->sha_out)) {
+            sha512_transform(ctx, &ctx->sha_out[0]);
+            ctx->sha_bufCnt = 0;
+        }
+    }
+}
+
+void __loDev_sha512_final(sha512_context *ctx)
+{
+    register int    j;
+    u_int64_t       bitLength, bitLengthMSB;
+    u_int64_t       i;
+    unsigned char   padByte, *datap;
+
+    bitLength = (ctx->sha_blocks << 10) | (ctx->sha_bufCnt << 3);
+    bitLengthMSB = (ctx->sha_blocksMSB << 10) | (ctx->sha_blocks >> 54);
+    padByte = 0x80;
+    __loDev_sha512_write(ctx, &padByte, 1);
+
+    /* pad extra space with zeroes */
+    padByte = 0;
+    while(ctx->sha_bufCnt != 112) {
+        __loDev_sha512_write(ctx, &padByte, 1);
+    }
+
+    /* write bit length, big endian byte order */
+    ctx->sha_out[112] = bitLengthMSB >> 56;
+    ctx->sha_out[113] = bitLengthMSB >> 48;
+    ctx->sha_out[114] = bitLengthMSB >> 40;
+    ctx->sha_out[115] = bitLengthMSB >> 32;
+    ctx->sha_out[116] = bitLengthMSB >> 24;
+    ctx->sha_out[117] = bitLengthMSB >> 16;
+    ctx->sha_out[118] = bitLengthMSB >> 8;
+    ctx->sha_out[119] = bitLengthMSB;
+    ctx->sha_out[120] = bitLength >> 56;
+    ctx->sha_out[121] = bitLength >> 48;
+    ctx->sha_out[122] = bitLength >> 40;
+    ctx->sha_out[123] = bitLength >> 32;
+    ctx->sha_out[124] = bitLength >> 24;
+    ctx->sha_out[125] = bitLength >> 16;
+    ctx->sha_out[126] = bitLength >> 8;
+    ctx->sha_out[127] = bitLength;
+    sha512_transform(ctx, &ctx->sha_out[0]);
+    
+    /* return results in ctx->sha_out[0...63] */
+    datap = &ctx->sha_out[0];
+    j = 0;
+    do {
+        i = ctx->sha_H[j];
+        datap[0] = i >> 56;
+        datap[1] = i >> 48;
+        datap[2] = i >> 40;
+        datap[3] = i >> 32;
+        datap[4] = i >> 24;
+        datap[5] = i >> 16;
+        datap[6] = i >> 8;
+        datap[7] = i;
+        datap += 8;
+    } while(++j < 8);
+
+    /* clear sensitive information */
+    memset(&ctx->sha_out[64], 0, sizeof(sha512_context) - 64);
+}
+
+void __loDev_sha512_hash_buffer(unsigned char *ib, int ile, unsigned char *ob, int ole)
+{
+    sha512_context ctx;
+
+    if(ole < 1) return;
+    memset(ob, 0, ole);
+    if(ole > 64) ole = 64;
+    __loDev_sha512_init(&ctx);
+    __loDev_sha512_write(&ctx, ib, ile);
+    __loDev_sha512_final(&ctx);
+    memcpy(ob, &ctx.sha_out[0], ole);
+    memset(&ctx, 0, sizeof(ctx));
+}
+#endif
+
+#if defined(SHA384_NEEDED)
+void __loDev_sha384_init(sha512_context *ctx)
+{
+    memcpy(&ctx->sha_H[0], &sha384_hashInit[0], sizeof(ctx->sha_H));
+    ctx->sha_blocks = 0;
+    ctx->sha_blocksMSB = 0;
+    ctx->sha_bufCnt = 0;
+}
+
+void __loDev_sha384_hash_buffer(unsigned char *ib, int ile, unsigned char *ob, int ole)
+{
+    sha512_context ctx;
+
+    if(ole < 1) return;
+    memset(ob, 0, ole);
+    if(ole > 48) ole = 48;
+    __loDev_sha384_init(&ctx);
+    __loDev_sha512_write(&ctx, ib, ile);
+    __loDev_sha512_final(&ctx);
+    memcpy(ob, &ctx.sha_out[0], ole);
+    memset(&ctx, 0, sizeof(ctx));
+}
+#endif
diff -urN util-linux-2.29.2/libmount/src/sha512.h util-linux-2.29.2-AES/libmount/src/sha512.h
--- util-linux-2.29.2/libmount/src/sha512.h	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/libmount/src/sha512.h	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,45 @@
+/*
+ *  sha512.h
+ *
+ *  Written by Jari Ruusu, April 16 2001
+ *
+ *  Copyright 2001 by Jari Ruusu.
+ *  Redistribution of this file is permitted under the GNU Public License.
+ */
+
+#include <sys/types.h>
+
+typedef struct {
+    unsigned char   sha_out[64];    /* results are here, bytes 0...31 */
+    u_int32_t       sha_H[8];
+    u_int64_t       sha_blocks;
+    int             sha_bufCnt;
+} sha256_context;
+
+typedef struct {
+    unsigned char   sha_out[128];   /* results are here, bytes 0...63 */
+    u_int64_t       sha_H[8];
+    u_int64_t       sha_blocks;
+    u_int64_t       sha_blocksMSB;
+    int             sha_bufCnt;
+} sha512_context;
+
+/* no sha384_context, use sha512_context */
+
+/* 256 bit hash, provides 128 bits of security against collision attacks */
+extern void __loDev_sha256_init(sha256_context *);
+extern void __loDev_sha256_write(sha256_context *, unsigned char *, int);
+extern void __loDev_sha256_final(sha256_context *);
+extern void __loDev_sha256_hash_buffer(unsigned char *, int, unsigned char *, int);
+
+/* 512 bit hash, provides 256 bits of security against collision attacks */
+extern void __loDev_sha512_init(sha512_context *);
+extern void __loDev_sha512_write(sha512_context *, unsigned char *, int);
+extern void __loDev_sha512_final(sha512_context *);
+extern void __loDev_sha512_hash_buffer(unsigned char *, int, unsigned char *, int);
+
+/* 384 bit hash, provides 192 bits of security against collision attacks */
+extern void __loDev_sha384_init(sha512_context *);
+/* no sha384_write(), use sha512_write() */
+/* no sha384_final(), use sha512_final(), result in ctx->sha_out[0...47]  */
+extern void __loDev_sha384_hash_buffer(unsigned char *, int, unsigned char *, int);
diff -urN util-linux-2.29.2/sys-utils/Makemodule.am util-linux-2.29.2-AES/sys-utils/Makemodule.am
--- util-linux-2.29.2/sys-utils/Makemodule.am	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/Makemodule.am	2017-03-10 17:02:59.000000000 +0200
@@ -194,7 +194,7 @@
 if BUILD_LOSETUP
 sbin_PROGRAMS += losetup
 dist_man_MANS += sys-utils/losetup.8
-losetup_SOURCES = sys-utils/losetup.c
+losetup_SOURCES = sys-utils/losetup1.c sys-utils/loop.c libmount/src/sha512.c libmount/src/rmd160.c libmount/src/aes.c
 losetup_LDADD = $(LDADD) libcommon.la libsmartcols.la
 losetup_CFLAGS = $(AM_CFLAGS) -I$(ul_libsmartcols_incdir)
 
@@ -285,6 +285,8 @@
 
 swapon_SOURCES = \
 	sys-utils/swapon.c \
+	sys-utils/loop.c \
+	libmount/src/sha512.c \
 	sys-utils/swapon-common.c \
 	sys-utils/swapon-common.h \
 	lib/swapprober.c \
@@ -301,6 +303,7 @@
 
 swapoff_SOURCES = \
 	sys-utils/swapoff.c \
+	sys-utils/loop.c \
 	sys-utils/swapon-common.c \
 	sys-utils/swapon-common.h \
 	lib/swapprober.c \
diff -urN util-linux-2.29.2/sys-utils/loop.c util-linux-2.29.2-AES/sys-utils/loop.c
--- util-linux-2.29.2/sys-utils/loop.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/loop.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,221 @@
+/*
+ *  loop.c
+ *
+ *  Copyright 2003 by Jari Ruusu.
+ *  Redistribution of this file is permitted under the GNU GPL
+ */
+
+/* collection of loop helper functions used by losetup, mount and swapon */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <errno.h>
+#include "loop.h"
+
+static void convert_info_to_info64(struct loop_info *info, struct loop_info64 *info64)
+{
+	memset(info64, 0, sizeof(*info64));
+	info64->lo_number = info->lo_number;
+	info64->lo_device = info->lo_device;
+	info64->lo_inode = info->lo_inode;
+	info64->lo_rdevice = info->lo_rdevice;
+	info64->lo_offset = info->lo_offset;
+	info64->lo_encrypt_type = info->lo_encrypt_type;
+	info64->lo_encrypt_key_size = info->lo_encrypt_key_size;
+	info64->lo_flags = info->lo_flags;
+	info64->lo_init[0] = info->lo_init[0];
+	info64->lo_init[1] = info->lo_init[1];
+	info64->lo_sizelimit = 0;
+	if (info->lo_encrypt_type == 18) /* LO_CRYPT_CRYPTOAPI */
+		memcpy(info64->lo_crypt_name, info->lo_name, sizeof(info64->lo_crypt_name));
+	else
+		memcpy(info64->lo_file_name, info->lo_name, sizeof(info64->lo_file_name));
+	memcpy(info64->lo_encrypt_key, info->lo_encrypt_key, sizeof(info64->lo_encrypt_key));
+}
+
+static int convert_info64_to_info(struct loop_info64 *info64, struct loop_info *info)
+{
+	memset(info, 0, sizeof(*info));
+	info->lo_number = info64->lo_number;
+	info->lo_device = info64->lo_device;
+	info->lo_inode = info64->lo_inode;
+	info->lo_rdevice = info64->lo_rdevice;
+	info->lo_offset = info64->lo_offset;
+	info->lo_encrypt_type = info64->lo_encrypt_type;
+	info->lo_encrypt_key_size = info64->lo_encrypt_key_size;
+	info->lo_flags = info64->lo_flags;
+	info->lo_init[0] = info64->lo_init[0];
+	info->lo_init[1] = info64->lo_init[1];
+	if (info->lo_encrypt_type == 18) /* LO_CRYPT_CRYPTOAPI */
+		memcpy(info->lo_name, info64->lo_crypt_name, sizeof(info->lo_name));
+	else
+		memcpy(info->lo_name, info64->lo_file_name, sizeof(info->lo_name));
+	memcpy(info->lo_encrypt_key, info64->lo_encrypt_key, sizeof(info->lo_encrypt_key));
+
+	/* error in case values were truncated */
+	if (info->lo_device != info64->lo_device ||
+	    info->lo_rdevice != info64->lo_rdevice ||
+	    info->lo_inode != info64->lo_inode ||
+	    (u_int64_t) info->lo_offset != info64->lo_offset ||
+	    info64->lo_sizelimit) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	return 0;
+}
+
+int loop_set_status64_ioctl(int fd, struct loop_info64 *info64)
+{
+	struct loop_info info;
+	struct loop_info64 tmp;
+	int r;
+
+	/*
+	 * This ugly work around is needed because some
+	 * Red Hat kernels are using same ioctl code:
+	 *  	#define LOOP_CHANGE_FD 0x4C04
+	 * vs.
+	 *	#define LOOP_SET_STATUS64 0x4C04
+	 * that is used by modern loop driver.
+	 *
+	 * Attempt to detect presense of LOOP_GET_STATUS64
+	 * ioctl before issuing LOOP_SET_STATUS64 ioctl.
+	 * Red Hat kernels with above LOOP_CHANGE_FD damage
+	 * should return -1 and set errno to EINVAL.
+	 */
+	r = ioctl(fd, LOOP_GET_STATUS64, &tmp);
+	memset(&tmp, 0, sizeof(tmp));
+	if ((r == 0) || (errno != EINVAL)) {
+		r = ioctl(fd, LOOP_SET_STATUS64, info64);
+		if (!r)
+			return 0;
+	}
+	r = convert_info64_to_info(info64, &info);
+	if (!r)
+		r = ioctl(fd, LOOP_SET_STATUS, &info);
+
+	/* don't leave copies of encryption key on stack */
+	memset(&info, 0, sizeof(info));
+	return r;
+}
+
+int loop_get_status64_ioctl(int fd, struct loop_info64 *info64)
+{
+	struct loop_info info;
+	int r;
+
+	memset(info64, 0, sizeof(*info64));
+	r = ioctl(fd, LOOP_GET_STATUS64, info64);
+	if (!r)
+		return 0;
+	r = ioctl(fd, LOOP_GET_STATUS, &info);
+	if (!r)
+		convert_info_to_info64(&info, info64);
+
+	/* don't leave copies of encryption key on stack */
+	memset(&info, 0, sizeof(info));
+	return r;
+}
+
+/* returns: 1=unused 0=busy */
+int is_unused_loop_device(int fd)
+{
+	struct loop_info64 info64;
+	struct loop_info info;
+	int r;
+
+	r = ioctl(fd, LOOP_GET_STATUS64, &info64);
+	memset(&info64, 0, sizeof(info64));
+	if (!r)
+		return 0;
+	if (errno == ENXIO)
+		return 1;
+
+	r = ioctl(fd, LOOP_GET_STATUS, &info);
+	memset(&info, 0, sizeof(info));
+	if (!r)
+		return 0;
+	if (errno == ENXIO)
+		return 1;
+	if (errno == EOVERFLOW)
+		return 0;
+	return 1;
+}
+
+struct loop_crypt_type_struct loop_crypt_type_tbl[] = {
+	{  0, 0,  0, "no" },
+	{  0, 0,  0, "none" },
+	{  1, 0,  0, "xor" },
+	{  3, 1, 16, "twofish" },
+	{  4, 1, 16, "blowfish" },
+	{  7, 1, 16, "serpent" },
+	{  8, 1, 16, "mars" },
+	{ 11, 3, 16, "rc6" },
+	{ 12, 0, 21, "tripleDES" },
+	{ 12, 0, 24, "3des" },
+	{ 12, 0, 24, "des3_ede" },
+	{ 16, 1, 16, "AES" },
+	{ -1, 0,  0, NULL }
+};
+
+static char *getApiName(char *e, int *len)
+{
+	int x, y, z = 1, q = -1;
+	unsigned char *s;
+
+	*len = y = 0;
+	s = (unsigned char *)strdup(e);
+	if(!s)
+		return "";
+	x = strlen((char *)s);
+	while(x > 0) {
+		x--;
+		if(!isdigit(s[x]))
+			break;
+		y += (s[x] - '0') * z;
+		z *= 10;
+		q = x;
+	}
+	while(x >= 0) {
+		s[x] = tolower(s[x]);
+		if(s[x] == '-')
+			s[x] = 0;
+		x--;
+	}
+	if(y >= 40) {
+		if(q >= 0)
+			s[q] = 0;
+		*len = y;
+	}
+	return((char *)s);
+}
+
+int loop_crypt_type(const char *name, u_int32_t *kbyp, char **apiName)
+{
+	int i, k;
+
+	*apiName = getApiName((char *)name, &k);
+	if(k < 0)
+		k = 0;
+	if(k > 256)
+		k = 256;
+	for (i = 0; loop_crypt_type_tbl[i].id != -1; i++) {
+		if (!strcasecmp (*apiName , loop_crypt_type_tbl[i].name)) {
+			*kbyp = k ? k >> 3 : loop_crypt_type_tbl[i].keyBytes;
+			return loop_crypt_type_tbl[i].id;
+		}
+	}
+	*kbyp = 16; /* 128 bits */
+	return 18; /* LO_CRYPT_CRYPTOAPI */
+}
+
+int try_cryptoapi_loop_interface(int fd, struct loop_info64 *loopinfo, char *apiName)
+{
+	snprintf((char *)loopinfo->lo_crypt_name, sizeof(loopinfo->lo_crypt_name), "%s-cbc", apiName);
+	loopinfo->lo_crypt_name[LO_NAME_SIZE - 1] = 0;
+	loopinfo->lo_encrypt_type = 18; /* LO_CRYPT_CRYPTOAPI */
+	return(loop_set_status64_ioctl(fd, loopinfo));
+}
diff -urN util-linux-2.29.2/sys-utils/loop.h util-linux-2.29.2-AES/sys-utils/loop.h
--- util-linux-2.29.2/sys-utils/loop.h	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/loop.h	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,87 @@
+/*
+ *  loop.h
+ *
+ *  Copyright 2003 by Jari Ruusu.
+ *  Redistribution of this file is permitted under the GNU GPL
+ */
+
+#ifndef _LOOP_H
+#define _LOOP_H 1
+
+#include <sys/types.h>
+#include <linux/version.h>
+#include <linux/posix_types.h>
+
+#define LO_CRYPT_NONE   0
+#define LO_CRYPT_XOR    1
+#define LO_CRYPT_DES    2
+#define LO_CRYPT_CRYPTOAPI 18
+
+#define LOOP_SET_FD		0x4C00
+#define LOOP_CLR_FD		0x4C01
+#define LOOP_SET_STATUS		0x4C02
+#define LOOP_GET_STATUS		0x4C03
+#define LOOP_SET_STATUS64	0x4C04
+#define LOOP_GET_STATUS64	0x4C05
+#define LOOP_MULTI_KEY_SETUP 	0x4C4D
+#define LOOP_MULTI_KEY_SETUP_V3	0x4C4E
+#define LOOP_RECOMPUTE_DEV_SIZE 0x4C52
+
+#define LO_NAME_SIZE    64
+#define LO_KEY_SIZE     32
+
+struct loop_info {
+	int		lo_number;
+#if LINUX_VERSION_CODE >= 0x20600
+	__kernel_old_dev_t lo_device;
+#else
+	__kernel_dev_t	lo_device;
+#endif
+	unsigned long	lo_inode;
+#if LINUX_VERSION_CODE >= 0x20600
+	__kernel_old_dev_t lo_rdevice;
+#else
+	__kernel_dev_t	lo_rdevice;
+#endif
+	int		lo_offset;
+	int		lo_encrypt_type;
+	int		lo_encrypt_key_size;
+	int		lo_flags;
+	char		lo_name[LO_NAME_SIZE];
+	unsigned char	lo_encrypt_key[LO_KEY_SIZE];
+	unsigned long	lo_init[2];
+	char		reserved[4];
+};
+
+struct loop_info64 {
+	u_int64_t	lo_device; 		/* ioctl r/o */
+	u_int64_t	lo_inode; 		/* ioctl r/o */
+	u_int64_t	lo_rdevice; 		/* ioctl r/o */
+	u_int64_t	lo_offset;		/* bytes */
+	u_int64_t	lo_sizelimit;		/* bytes, 0 == max available */
+	u_int32_t	lo_number;		/* ioctl r/o */
+	u_int32_t	lo_encrypt_type;
+	u_int32_t	lo_encrypt_key_size; 	/* ioctl w/o */
+	u_int32_t	lo_flags;		/* ioctl r/o */
+	unsigned char	lo_file_name[LO_NAME_SIZE];
+	unsigned char	lo_crypt_name[LO_NAME_SIZE];
+	unsigned char	lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
+	u_int64_t	lo_init[2];
+};
+
+extern int loop_set_status64_ioctl(int, struct loop_info64 *);
+extern int loop_get_status64_ioctl(int, struct loop_info64 *);
+extern int is_unused_loop_device(int);
+
+struct loop_crypt_type_struct {
+	short int id;
+	unsigned char flags; /* bit0 = show keybits, bit1 = add '-' before keybits */
+	unsigned char keyBytes;
+	char *name;
+};
+
+extern struct loop_crypt_type_struct loop_crypt_type_tbl[];
+extern int loop_crypt_type(const char *, u_int32_t *, char **);
+extern int try_cryptoapi_loop_interface(int, struct loop_info64 *, char *);
+
+#endif
diff -urN util-linux-2.29.2/sys-utils/losetup.8 util-linux-2.29.2-AES/sys-utils/losetup.8
--- util-linux-2.29.2/sys-utils/losetup.8	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/losetup.8	2017-03-10 17:02:59.000000000 +0200
@@ -1,204 +1,200 @@
-.TH LOSETUP 8 "November 2015" "util-linux" "System Administration"
+.TH LOSETUP 8 "2012-09-24" "Linux" "MAINTENANCE COMMANDS"
 .SH NAME
 losetup \- set up and control loop devices
 .SH SYNOPSIS
 .ad l
-Get info:
-.sp
-.in +5
-.B losetup
-.I loopdev
-.sp
-.B losetup -l
-.RB [ \-a ]
-.sp
-.B losetup -j
-.I file
-.RB [ \-o
-.IR offset ]
-.sp
-.in -5
-Detach a loop device:
-.sp
-.in +5
-.B "losetup \-d"
-.IR loopdev ...
-.sp
-.in -5
-Detach all associated loop devices:
-.sp
-.in +5
-.B "losetup \-D"
-.sp
-.in -5
-Print the name of the first unused loop device:
-.sp
-.in +5
-.B "losetup \-f"
-.sp
-.in -5
-Set up a loop device:
-.sp
-.in +5
-.B losetup
-.RB [ \-o
-.IR offset ]
-.RB [ \-\-sizelimit
-.IR size ]
-.in +8
-.RB [ \-Pr ]
-.RB [ \-\-show ]  " \-f" | \fIloopdev\fP
-.I file
-.sp
-.in -13
-Resize a loop device:
-.sp
-.in +5
-.B "losetup \-c"
-.I loopdev
-.in -5
+.B losetup
+[options]
+.I loop_device
+file
+.br
+.B losetup -F
+[options]
+.I loop_device
+[file]
+.br
+.B losetup
+[
+.B \-d
+]
+.I loop_device
+.br
+.B losetup -a
+.br
+.B losetup -f
+.br
+.B losetup
+.B \-R
+.I loop_device
 .ad b
 .SH DESCRIPTION
 .B losetup
 is used to associate loop devices with regular files or block devices,
-to detach loop devices, and to query the status of a loop device.  If only the
-\fIloopdev\fP argument is given, the status of the corresponding loop
-device is shown.  If no option is given, all loop devices are shown.
-.sp
-Note that the old output format (i.e. \fBlosetup -a\fR) with comma-delimited
-strings is deprecated in favour of the \fB--list\fR output format.
-.sp
-It's possible to create more independent loop devices for the same backing
-file.
-.B This setup may be dangerous, can cause data loss, corruption and overwrites.
-Use \fB\-\-nooverlap\fR to avoid this problem.
-
+to detach loop devices and to query the status of a loop device. If only the
+\fIloop_device\fP argument is given, the status of the corresponding loop
+device is shown.
 .SH OPTIONS
-The \fIsize\fR and \fIoffset\fR
-arguments may be followed by the multiplicative suffixes KiB (=1024),
-MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is
-optional, e.g., "K" has the same meaning as "KiB") or the suffixes
-KB (=1000), MB (=1000*1000), and so on for GB, TB, PB, EB, ZB and YB.
-
-.TP
-.BR \-a , " \-\-all"
-Show the status of all loop devices.  Note that not all information is accessible
-for non-root users.  See also \fB\-\-list\fR.  The old output format (as printed
-without \fB--list)\fR is deprecated.
-.TP
-.BR \-c , " \-\-set\-capacity " \fIloopdev
-Force the loop driver to reread the size of the file associated with the
-specified loop device.
-.TP
-.BR \-d , " \-\-detach " \fIloopdev\fR...
-Detach the file or device associated with the specified loop device(s).
-.TP
-.BR \-D , " \-\-detach\-all"
-Detach all associated loop devices.
-.TP
-.BR \-\-direct\-io [ =on | off ]
-Enable or disable direct I/O for the backing file.  The optional argument
-can be either \fBon\fR or \fBoff\fR.  If the argument is omitted, it defaults
-to \fBon\fR.
-.TP
-.BR \-f , " \-\-find"
-Find the first unused loop device.  If a
-.I file
-argument is present, use the found device as loop device.
-Otherwise, just print its name.
-.TP
-.BR \-L , " \-\-nooverlap"
-Check for conflicts between loop devices to avoid situation when the same
-backing file is shared between more loop devices. If the file is already used
-by another device then re-use the device rather than a new one. The option
-makes sense only with \fB\-\-find\fP.
-.TP
-.BR \-j , " \-\-associated " \fIfile
-Show the status of all loop devices associated with the given
-.IR file .
-.TP
-.BR \-J , " \-\-json"
-Use JSON format for \fB\-\-list\fP output.
-.TP
-.BR \-l , " \-\-list"
-If a loop device or the \fB-a\fR option is specified, print the default columns
-for either the specified loop device or all loop devices; the default is to
-print info about all devices.  See also \fB\-\-output\fP, \fB\-\-noheadings\fP
-\fB\-\-json\fP and \fB\-\-raw\fP.
-.TP
-.BR \-n , " \-\-noheadings"
-Don't print headings for \fB\-\-list\fP output format.
-.TP
-.BR \-o , " \-\-offset " \fIoffset
-The data start is moved \fIoffset\fP bytes into the specified file or device.
-.TP
-.BR \-O , " \-\-output " \fIcolumns
-Specify the columns that are to be printed for the \fB\-\-list\fP output.
-.TP
-.BR \-P , " \-\-partscan"
-Force the kernel to scan the partition table on a newly created loop device.
-.IP "\fB\-\-raw\fP"
-Use the raw \fB\-\-list\fP output format.
-.TP
-.BR \-r , " \-\-read\-only"
-Set up a read-only loop device.
-.IP "\fB\-\-sizelimit \fIsize\fP"
-The data end is set to no more than \fIsize\fP bytes after the data start.
-.IP "\fB\-\-show\fP"
-Display the name of the assigned loop device if the
-.B \-f
-option and a
-.I file
-argument are present.
-.TP
-.BR \-v , " \-\-verbose"
+.IP \fB\-a\fP
+Show status of all loop devices.
+.IP "\fB\-C \fIitercountk\fP"
+Runs hashed passphrase through \fIitercountk\fP thousand iterations of AES-256
+before using it for loop encryption. This consumes lots of CPU cycles at
+loop setup/mount time but not thereafter. In combination with passphrase seed
+this slows down dictionary attacks. Iteration is not done in multi-key mode.
+.IP "\fB\-d\fP"
+Detach the file or device associated with the specified loop device.
+.IP "\fB\-e \fIencryption\fP"
+.RS
+Enable data encryption. Following encryption types are recognized:
+.IP \fBNONE\fP
+Use no encryption (default).
+.PD 0
+.IP \fBXOR\fP
+Use a simple XOR encryption.
+.IP "\fBAES128 AES\fP"
+Use 128 bit AES encryption. Passphrase is hashed with SHA-256 by default.
+.IP \fBAES192\fP
+Use 192 bit AES encryption. Passphrase is hashed with SHA-384 by default.
+.IP \fBAES256\fP
+Use 256 bit AES encryption. Passphrase is hashed with SHA-512 by default.
+
+.IP "\fBtwofish128 twofish160 twofish192 twofish256\fP"
+.IP "\fBblowfish128 blowfish160 blowfish192 blowfish256\fP"
+.IP "\fBserpent128 serpent192 serpent256 mars128 mars192\fP"
+.IP "\fBmars256 rc6-128 rc6-192 rc6-256 tripleDES\fP"
+These encryption types are available if they are enabled in kernel
+configuration or corresponding modules have been loaded to kernel.
+.PD
+.RE
+.IP "\fB\-f\fP"
+Find and show next unused loop device.
+.IP "\fB\-F\fP"
+Reads and uses mount options from /etc/fstab that match specified loop
+device, including offset= sizelimit= encryption= pseed= phash= loinit=
+gpgkey= gpghome= cleartextkey= itercountk= and looped to device/file name.
+loop= option in /etc/fstab must match specified loop device name. Command
+line options take precedence in case of conflict.
+.IP "\fB\-G \fIgpghome\fP"
+Set gpg home directory to \fIgpghome\fP, so that gpg uses public/private
+keys on \fIgpghome\fP directory. This is only used when gpgkey file needs to
+be decrypted using public/private keys. If gpgkey file is encrypted with
+symmetric cipher only, public/private keys are not required and this option
+has no effect.
+.IP "\fB\-H \fIphash\fP"
+Uses \fIphash\fP function to hash passphrase. Available hash functions are
+sha256, sha384, sha512 and rmd160. unhashed1 and unhashed2
+functions also exist for compatibility with some obsolete implementations.
+
+Hash function random does not ask for passphrase but sets up random keys and
+attempts to put loop to multi-key mode. When random/1777 hash type is used
+as mount option for mount program, mount program will create new file system
+on the loop device and construct initial permissions of file system root
+directory from octal digits that follow the slash character.
+
+WARNING! DO NOT USE RANDOM HASH TYPE ON PARTITION WITH EXISTING IMPORTANT
+DATA ON IT. RANDOM HASH TYPE WILL DESTROY YOUR DATA.
+.IP "\fB\-I \fIloinit\fP"
+Passes a numeric value of \fIloinit\fP as a parameter to cipher transfer
+function. Cipher transfer functions are free to interpret value as they
+want.
+.IP "\fB\-K \fIgpgkey\fP"
+Passphrase is piped to gpg so that gpg can decrypt file \fIgpgkey\fP which
+contains the real keys that are used to encrypt loop device. If decryption
+requires public/private keys and gpghome is not specified, all users use
+their own gpg public/private keys to decrypt \fIgpgkey\fP. Decrypted
+\fIgpgkey\fP should contain 1 or 64 or 65 keys, each key at least 20
+characters and separated by newline. If decrypted \fIgpgkey\fP contains 64
+or 65 keys, then loop device is put to multi-key mode. In multi-key mode
+first key is used for first sector, second key for second sector, and so on.
+65th key, if present, is used as additional input to MD5 IV computation.
+.IP "\fB\-o \fIoffset\fP"
+The data start is moved \fIoffset\fP bytes into the specified file or
+device. Normally offset is included in IV (initialization vector)
+computations. If offset is prefixed with @ character, then offset is not
+included in IV computations. @ prefix functionality may not be supported on
+some older kernels and/or loop drivers.
+.IP "\fB\-p \fIpasswdfd\fP"
+Read the passphrase from file descriptor \fIpasswdfd\fP instead of the
+terminal. If -K option is not being used (no gpg key file), then losetup
+attempts to read 65 keys from \fIpasswdfd\fP, each key at least 20
+characters and separated by newline. If losetup successfully reads 64 or 65
+keys, then loop device is put to multi-key mode. If losetup encounters
+end-of-file before 64 keys are read, then only first key is used in
+single-key mode.
+
+echo SecretPassphraseHere | losetup -p0 -K foo.gpg -e AES128 ...
+
+In above example, losetup reads passphrase from file descriptor 0 (stdin).
+.IP "\fB\-P \fIcleartextkey\fP"
+Read the passphrase from file \fIcleartextkey\fP instead of the
+terminal. If -K option is not being used (no gpg key file), then losetup
+attempts to read 65 keys from \fIcleartextkey\fP, each key at least 20
+characters and separated by newline. If losetup successfully reads 64 or 65
+keys, then loop device is put to multi-key mode. If losetup encounters
+end-of-file before 64 keys are read, then only first key is used in
+single-key mode. If both -p and -P options are used, then -p option takes
+precedence. These are equivalent:
+
+losetup -p3 -K foo.gpg -e AES128 ...   3<someFileName
+
+losetup -P someFileName -K foo.gpg -e AES128 ...
+
+In first line of above example, in addition to normal open file descriptors
+(0==stdin 1==stdout 2==stderr), shell opens the file and passes open file
+descriptor to started losetup program. In second line of above example,
+losetup opens the file itself.
+.IP "\fB\-r\fP"
+Read-only mode.
+.IP "\fB\-R\fP"
+Resize existing, already set up loop device, to new changed underlying
+device size. This option is for changing mounted live file system size on
+LVM volume. This functionality may not be supported on some older kernels
+and/or loop drivers.
+.IP "\fB\-s \fIsizelimit\fP"
+Size of loop device is limited to \fIsizelimit\fP bytes. If unspecified or
+set to zero, loop device size is set to maximum available (file size minus
+offset). This option may not be supported on some older kernels and/or loop
+drivers.
+.IP "\fB\-S \fIpseed\fP"
+Sets encryption passphrase seed \fIpseed\fP which is appended to user supplied
+passphrase before hashing. Using different seeds for different partitions
+makes dictionary attacks slower but does not prevent them if user supplied
+passphrase is guessable. Seed is not used in multi-key mode.
+.IP "\fB\-T\fP"
+Asks passphrase twice.
+.IP "\fB\-v\fP"
 Verbose mode.
-.TP
-.BR \-V , " \-\-version"
-Display version information and exit.
-.TP
-.BR \-h , " \-\-help"
-Display help text and exit.
-
-.SH ENCRYPTION
-.B Cryptoloop is no longer supported in favor of dm-crypt.
-.B For more details see cryptsetup(8).
-
 .SH RETURN VALUE
 .B losetup
-returns 0 on success, nonzero on failure.  When
+returns 0 on success, nonzero on failure. When
 .B losetup
 displays the status of a loop device, it returns 1 if the device
 is not configured and 2 if an error occurred which prevented
-determining the status of the device.
+.B losetup
+from determining the status of the device.
 
 .SH FILES
-.TP
-.I /dev/loop[0..N]
-loop block devices
-.TP
-.I /dev/loop-control
-loop control device
-
+.nf
+/dev/loop0,/dev/loop1,...   loop devices (major=7)
+.fi
 .SH EXAMPLE
 The following commands can be used as an example of using the loop device.
 .nf
-.IP
-# dd if=/dev/zero of=~/file.img bs=1MiB count=10
-# losetup --find --show ~/file.img
-/dev/loop0
-# mkfs -t ext2 /dev/loop0
-# mount /dev/loop0 /mnt
+
+dd if=/dev/zero of=/file bs=1k count=500
+head -c 3705 /dev/random | uuencode -m - | head -n 66 \\
+    | tail -n 65 | gpg --symmetric -a >/etc/fskey9.gpg
+losetup -e AES128 -K /etc/fskey9.gpg /dev/loop0 /file
+mkfs -t ext2 /dev/loop0
+mount -t ext2 /dev/loop0 /mnt
  ...
-# umount /dev/loop0
-# losetup --detach /dev/loop0
+umount /dev/loop0
+losetup -d /dev/loop0
 .fi
-.SH ENVIRONMENT
-.IP LOOPDEV_DEBUG=all
-enables debug output.
+.SH RESTRICTION
+XOR encryption is terribly weak.
 .SH AUTHORS
-Karel Zak <kzak@redhat.com>, based on the original version from
-Theodore Ts'o <tytso@athena.mit.edu>
-.SH AVAILABILITY
-The losetup command is part of the util-linux package and is available from
-ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
+.nf
+Original version: Theodore Ts'o <tytso@athena.mit.edu>
+AES support: Jari Ruusu
+.fi
diff -urN util-linux-2.29.2/sys-utils/losetup1.c util-linux-2.29.2-AES/sys-utils/losetup1.c
--- util-linux-2.29.2/sys-utils/losetup1.c	1970-01-01 02:00:00.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/losetup1.c	2017-03-10 17:02:59.000000000 +0200
@@ -0,0 +1,1281 @@
+/* Taken from Ted's losetup.c - Mitch <m.dsouza@mrc-apu.cam.ac.uk> */
+/* Added vfs mount options - aeb - 960223 */
+/* Removed lomount - aeb - 960224 */
+
+/*
+ * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ * 1999-03-21 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * - fixed strerr(errno) in gettext calls
+ * 2001-04-11 Jari Ruusu
+ * - added AES support
+ */
+
+#define LOOPMAJOR	7
+
+/*
+ * losetup.c - setup and control loop devices
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/sysmacros.h>
+#include <sys/wait.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <mntent.h>
+#include <locale.h>
+#include <sys/time.h>
+#include <sys/utsname.h>
+#include <signal.h>
+
+#include "loop.h"
+#include "nls.h"
+#include "../libmount/src/sha512.h"
+#include "../libmount/src/rmd160.h"
+#include "../libmount/src/aes.h"
+
+#if !defined(BLKGETSIZE64)
+# define BLKGETSIZE64 _IOR(0x12,114,size_t)
+#endif
+
+int verbose = 0;
+
+#if !defined(LOOP_PASSWORD_MIN_LENGTH)
+# define  LOOP_PASSWORD_MIN_LENGTH   20
+#endif
+
+char    *passFDnumber = (char *)0;
+char    *passAskTwice = (char *)0;
+char    *passSeedString = (char *)0;
+char    *passHashFuncName = (char *)0;
+char    *passIterThousands = (char *)0;
+char    *loInitValue = (char *)0;
+char    *gpgKeyFile = (char *)0;
+char    *gpgHomeDir = (char *)0;
+char    *clearTextKeyFile = (char *)0;
+char    *loopOffsetBytes = (char *)0;
+char    *loopSizeBytes = (char *)0;
+char    *loopEncryptionType = (char *)0;
+
+static int  multiKeyMode = 0;   /* 0=single-key 64=multi-key-v2 65=multi-key-v3 1000=any */
+static char *multiKeyPass[66];
+static char *loopFileName;
+
+static char *xstrdup(const char *s)
+{
+    char *t;
+    if(!s) return NULL;
+    t = strdup(s);
+    if(!t) {
+        fprintf(stderr, "not enough memory\n");
+        exit(2); /* EX_SYSERR */
+    }
+    return t;
+}
+
+static char *
+crypt_name (int id, int *flags) {
+	int i;
+
+	for (i = 0; loop_crypt_type_tbl[i].id != -1; i++)
+		if(id == loop_crypt_type_tbl[i].id) {
+			*flags = loop_crypt_type_tbl[i].flags;
+			return loop_crypt_type_tbl[i].name;
+		}
+	*flags = 0;
+	if(id == 18)
+		return "CryptoAPI";
+	return "undefined";
+}
+
+static int
+show_loop(char *device) {
+	struct loop_info64 loopinfo;
+	int fd;
+
+	if ((fd = open(device, O_RDONLY)) < 0) {
+		int errsv = errno;
+		fprintf(stderr, _("loop: can't open device %s: %s\n"),
+			device, strerror (errsv));
+		return 2;
+	}
+	if (loop_get_status64_ioctl(fd, &loopinfo) < 0) {
+		int errsv = errno;
+		close (fd);
+		fprintf(stderr, _("loop: can't get info on device %s: %s\n"),
+			device, strerror (errsv));
+		return 1;
+	}
+	close (fd);
+	loopinfo.lo_file_name[LO_NAME_SIZE-1] = 0;
+	loopinfo.lo_crypt_name[LO_NAME_SIZE-1] = 0;
+	printf("%s: [%04llx]:%llu (%s)", device, (unsigned long long)loopinfo.lo_device,
+		(unsigned long long)loopinfo.lo_inode, loopinfo.lo_file_name);
+	if (loopinfo.lo_offset) {
+		if ((long long)loopinfo.lo_offset < 0) {
+			printf(_(" offset=@%llu"), -((unsigned long long)loopinfo.lo_offset));
+		} else {
+			printf(_(" offset=%llu"), (unsigned long long)loopinfo.lo_offset);
+		}
+	}
+	if (loopinfo.lo_sizelimit)
+		printf(_(" sizelimit=%llu"), (unsigned long long)loopinfo.lo_sizelimit);
+	if (loopinfo.lo_encrypt_type) {
+		int flags;
+		char *s = crypt_name (loopinfo.lo_encrypt_type, &flags);
+
+		printf(_(" encryption=%s"), s);
+		/* type 18 == LO_CRYPT_CRYPTOAPI */
+		if (loopinfo.lo_encrypt_type == 18) {
+			printf("/%s", loopinfo.lo_crypt_name);
+		} else {
+			if(flags & 2)
+				printf("-");
+			if(flags & 1)
+				printf("%u", (unsigned int)loopinfo.lo_encrypt_key_size << 3);
+		}
+	}
+	switch(loopinfo.lo_flags & 0x180000) {
+	case 0x180000:
+		printf(_(" multi-key-v3"));
+		break;
+	case 0x100000:
+		printf(_(" multi-key-v2"));
+		break;
+	}
+	/* type 2 == LO_CRYPT_DES */
+	if (loopinfo.lo_init[0] && (loopinfo.lo_encrypt_type != 2))
+		printf(_(" loinit=%llu"), (unsigned long long)loopinfo.lo_init[0]);
+	if (loopinfo.lo_flags & 0x200000)
+		printf(_(" read-only"));
+	printf("\n");
+
+	return 0;
+}
+
+#define SIZE(a) (sizeof(a)/sizeof(a[0]))
+
+static char *
+find_unused_loop_device (void) {
+	/* Just creating a device, say in /tmp, is probably a bad idea -
+	   people might have problems with backup or so.
+	   So, we just try /dev/loop[0-7]. */
+	char dev[20];
+	char *loop_formats[] = { "/dev/loop%d", "/dev/loop/%d" };
+	int i, j, fd, somedev = 0, someloop = 0;
+	struct stat statbuf;
+
+	for (j = 0; j < (int)SIZE(loop_formats); j++) {
+	    for(i = 0; i < 256; i++) {
+		sprintf(dev, loop_formats[j], i);
+		if (stat (dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
+			somedev++;
+			fd = open (dev, O_RDONLY);
+			if (fd >= 0) {
+				if (is_unused_loop_device(fd) == 0)
+					someloop++;		/* in use */
+				else if (errno == ENXIO) {
+					close (fd);
+					return xstrdup(dev);/* probably free */
+				}
+				close (fd);
+			}
+			continue;/* continue trying as long as devices exist */
+		}
+		break;
+	    }
+	}
+
+	if (!somedev)
+		fprintf(stderr, _("Error: could not find any loop device\n"));
+	else if (!someloop)
+		fprintf(stderr, _("Error: could not open any loop device\n"));
+	else
+		fprintf(stderr, _("Error: could not find any free loop device\n"));
+	return 0;
+}
+
+static int rd_wr_retry(int fd, char *buf, int cnt, int w)
+{
+	int x, y, z;
+
+	x = 0;
+	while(x < cnt) {
+		y = cnt - x;
+		if(w) {
+			z = write(fd, buf + x, y);
+		} else {
+			z = read(fd, buf + x, y);
+			if (!z) return x;
+		}
+		if(z < 0) {
+			if ((errno == EAGAIN) || (errno == ENOMEM) || (errno == ERESTART) || (errno == EINTR)) {
+				continue;
+			}
+			return x;
+		}
+		x += z;
+	}
+	return x;
+}
+
+static char *get_FD_pass(int fd)
+{
+	char *p = NULL, *n;
+	int x = 0, y = 0;
+
+	do {
+		if(y >= (x - 1)) {
+			x += 128;
+			/* Must enforce some max limit here -- this code   */
+			/* runs as part of mount, and mount is setuid root */
+			/* and has used mlockall(MCL_CURRENT | MCL_FUTURE) */
+			if(x > (4*1024)) return(NULL);
+			n = malloc(x);
+			if(!n) return(NULL);
+			if(p) {
+				memcpy(n, p, y);
+				memset(p, 0, y);
+				free(p);
+			}
+			p = n;
+		}
+		if(rd_wr_retry(fd, p + y, 1, 0) != 1) break;
+		if((p[y] == '\n') || !p[y]) break;
+		y++;
+	} while(1);
+	if(p) p[y] = 0;
+	return p;
+}
+
+static unsigned long long mystrtoull(char *s, int acceptAT)
+{
+	unsigned long long v = 0;
+	int negative = 0;
+
+	while ((*s == ' ') || (*s == '\t'))
+		s++;
+	if (acceptAT && (*s == '@')) {
+		s++;
+		negative = 1;
+	}
+	if (*s == '0') {
+		s++;
+		if ((*s == 'x') || (*s == 'X')) {
+			s++;
+			sscanf(s, "%llx", &v);
+		} else {
+			sscanf(s, "%llo", &v);
+		}
+	} else {
+		sscanf(s, "%llu", &v);
+	}
+	return negative ? -v : v;
+}
+
+static void warnAboutBadKeyData(int x)
+{
+	if((x > 1) && (x != 64) && (x != 65)) {
+		fprintf(stderr, _("Warning: Unknown key data format - using it anyway\n"));
+	}
+}
+
+static int are_these_files_same(const char *name1, const char *name2)
+{
+	struct stat statbuf1;
+	struct stat statbuf2;
+
+	if(!name1 || !*name1 || !name2 || !*name2) return 0;
+	if(stat(name1, &statbuf1)) return 0;
+	if(stat(name2, &statbuf2)) return 0;
+	if(statbuf1.st_dev != statbuf2.st_dev) return 0;
+	if(statbuf1.st_ino != statbuf2.st_ino) return 0;
+	return 1;   /* are same */
+}
+
+static char *do_GPG_pipe(char *pass)
+{
+	int     x, pfdi[2], pfdo[2];
+	char    str[10], *a[16], *e[2], *h;
+	pid_t   gpid;
+	struct passwd *p;
+	void    *oldSigPipeHandler;
+
+	if((getuid() == 0) && gpgHomeDir && gpgHomeDir[0]) {
+		h = gpgHomeDir;
+	} else {
+		if(!(p = getpwuid(getuid()))) {
+			fprintf(stderr, _("Error: Unable to detect home directory for uid %d\n"), (int)getuid());
+			return NULL;
+		}
+		h = p->pw_dir;
+	}
+	if(!(e[0] = malloc(strlen(h) + 6))) {
+		nomem1:
+		fprintf(stderr, _("Error: Unable to allocate memory\n"));
+		return NULL;
+	}
+	sprintf(e[0], "HOME=%s", h);
+	e[1] = 0;
+
+	if(pipe(&pfdi[0])) {
+		nomem2:
+		free(e[0]);
+		goto nomem1;
+	}
+	if(pipe(&pfdo[0])) {
+		close(pfdi[0]);
+		close(pfdi[1]);
+		goto nomem2;
+	}
+
+	/*
+	 * When this code is run as part of losetup, normal read permissions
+	 * affect the open() below because losetup is not setuid-root.
+	 *
+	 * When this code is run as part of mount, only root can set
+	 * 'gpgKeyFile' and as such, only root can decide what file is opened
+	 * below. However, since mount is usually setuid-root all non-root
+	 * users can also open() the file too, but that file's contents are
+	 * only piped to gpg. This readable-for-all is intended behaviour,
+	 * and is very useful in situations where non-root users mount loop
+	 * devices with their own gpg private key, and yet don't have access
+	 * to the actual key used to encrypt loop device.
+	 */
+	if((x = open(gpgKeyFile, O_RDONLY)) == -1) {
+		fprintf(stderr, _("Error: unable to open %s for reading\n"), gpgKeyFile);
+		nomem3:
+		free(e[0]);
+		close(pfdo[0]);
+		close(pfdo[1]);
+		close(pfdi[0]);
+		close(pfdi[1]);
+		return NULL;
+	}
+
+	/*
+	 * If someone puts a gpg key file at beginning of device and
+	 * puts the real file system at some offset into the device,
+	 * this code extracts that gpg key file into a temp file so gpg
+	 * won't end up reading whole device when decrypting the key file.
+	 *
+	 * Example of encrypted cdrom mount with 8192 bytes reserved for gpg key file:
+	 * mount -t iso9660 /dev/cdrom /cdrom -o loop=/dev/loop0,encryption=AES128,gpgkey=/dev/cdrom,offset=8192
+	 *                  ^^^^^^^^^^                                                    ^^^^^^^^^^        ^^^^
+	 */
+	if(loopOffsetBytes && are_these_files_same(loopFileName, gpgKeyFile)) {
+		FILE *f;
+		char b[1024];
+		long long cnt;
+		int cnt2, cnt3;
+
+		cnt = mystrtoull(loopOffsetBytes, 1);
+		if(cnt < 0) cnt = -cnt;
+		if(cnt > (1024 * 1024)) cnt = 1024 * 1024; /* sanity check */
+		f = tmpfile();
+		if(!f) {
+			fprintf(stderr, _("Error: unable to create temp file\n"));
+			close(x);
+			goto nomem3;
+		}
+		while(cnt > 0) {
+			cnt2 = sizeof(b);
+			if(cnt < cnt2) cnt2 = cnt;
+			cnt3 = rd_wr_retry(x, b, cnt2, 0);
+			if(cnt3 && (fwrite(b, cnt3, 1, f) != 1)) {
+				tmpWrErr:
+				fprintf(stderr, _("Error: unable to write to temp file\n"));
+				fclose(f);
+				close(x);
+				goto nomem3;
+			}
+			if(cnt2 != cnt3) break;
+			cnt -= cnt3;
+		}
+		if(fflush(f)) goto tmpWrErr;
+		close(x);
+		x = dup(fileno(f));
+		fclose(f);
+		lseek(x, 0L, SEEK_SET);
+	}
+
+	sprintf(str, "%d", pfdi[0]);
+	if(!(gpid = fork())) {
+		dup2(x, 0);
+		dup2(pfdo[1], 1);
+		close(x);
+		close(pfdi[1]);
+		close(pfdo[0]);
+		close(pfdo[1]);
+		if((x = open("/dev/null", O_WRONLY)) >= 0) {
+			dup2(x, 2);
+			close(x);
+		}
+		x = 0;
+		a[x++] = "gpg";
+		if(gpgHomeDir && gpgHomeDir[0]) {
+			a[x++] = "--homedir";
+			a[x++] = gpgHomeDir;
+		}
+		a[x++] = "--no-options";
+		a[x++] = "--quiet";
+		a[x++] = "--batch";
+		a[x++] = "--no-tty";
+		a[x++] = "--passphrase-fd";
+		a[x++] = str;
+		a[x++] = "--decrypt";
+		a[x] = 0;
+		if(setgid(getgid())) exit(1);
+		if(setuid(getuid())) exit(1);
+		for(x = 3; x < 1024; x++) {
+			if(x == pfdi[0]) continue;
+			close(x);
+		}
+		execve("/bin/gpg", &a[0], &e[0]);
+		execve("/usr/bin/gpg", &a[0], &e[0]);
+		execve("/usr/local/bin/gpg", &a[0], &e[0]);
+		exit(1);
+	}
+	free(e[0]);
+	close(x);
+	close(pfdi[0]);
+	close(pfdo[1]);
+	if(gpid == -1) {
+		close(pfdi[1]);
+		close(pfdo[0]);
+		goto nomem1;
+	}
+
+	x = strlen(pass);
+
+	/* ignore possible SIGPIPE signal while writing to gpg */
+	oldSigPipeHandler = signal(SIGPIPE, SIG_IGN);
+	rd_wr_retry(pfdi[1], pass, x, 1);
+	rd_wr_retry(pfdi[1], "\n", 1, 1);
+	if(oldSigPipeHandler != SIG_ERR) signal(SIGPIPE, oldSigPipeHandler);
+
+	close(pfdi[1]);
+	memset(pass, 0, x);
+	x = 0;
+	while(x < 66) {
+		multiKeyPass[x] = get_FD_pass(pfdo[0]);
+		if(!multiKeyPass[x]) {
+			/* mem alloc failed - abort */
+			multiKeyPass[0] = 0;
+			break;
+		}
+		if(strlen(multiKeyPass[x]) < LOOP_PASSWORD_MIN_LENGTH) break;
+		x++;
+	}
+	warnAboutBadKeyData(x);
+	if(x >= 65)
+		multiKeyMode = 65;
+	if(x == 64)
+		multiKeyMode = 64;
+	close(pfdo[0]);
+	waitpid(gpid, &x, 0);
+	if(!multiKeyPass[0]) goto nomem1;
+	return multiKeyPass[0];
+}
+
+static char *sGetPass(int minLen, int warnLen)
+{
+	char *p, *s, *seed;
+	int i, ask2, close_i_fd = 0;
+
+	if(!passFDnumber) {
+		if(clearTextKeyFile) {
+			if((i = open(clearTextKeyFile, O_RDONLY)) == -1) {
+				fprintf(stderr, _("Error: unable to open %s for reading\n"), clearTextKeyFile);
+				return NULL;
+			}
+			close_i_fd = 1;
+			goto contReadFrom_i;
+		}
+		p = getpass(_("Password: "));
+		ask2 = passAskTwice ? 1 : 0;
+	} else {
+		i = atoi(passFDnumber);
+		contReadFrom_i:
+		if(gpgKeyFile && gpgKeyFile[0]) {
+			p = get_FD_pass(i);
+			if(close_i_fd) close(i);
+		} else {
+			int x = 0;
+			while(x < 66) {
+				multiKeyPass[x] = get_FD_pass(i);
+				if(!multiKeyPass[x]) goto nomem;
+				if(strlen(multiKeyPass[x]) < LOOP_PASSWORD_MIN_LENGTH) break;
+				x++;
+			}
+			if(close_i_fd) close(i);
+			warnAboutBadKeyData(x);
+			if(x >= 65) {
+				multiKeyMode = 65;
+				return multiKeyPass[0];
+			}
+			if(x == 64) {
+				multiKeyMode = 64;
+				return multiKeyPass[0];
+			}
+			p = multiKeyPass[0];
+		}
+		ask2 = 0;
+	}
+	if(!p) goto nomem;
+	if(gpgKeyFile && gpgKeyFile[0]) {
+		if(ask2) {
+			i = strlen(p);
+			s = malloc(i + 1);
+			if(!s) goto nomem;
+			strcpy(s, p);
+			p = getpass(_("Retype password: "));
+			if(!p) goto nomem;
+			if(strcmp(s, p)) goto compareErr;
+			memset(s, 0, i);
+			free(s);
+			ask2 = 0;
+		}
+		p = do_GPG_pipe(p);
+		if(!p) return(NULL);
+		if(!p[0]) {
+			fprintf(stderr, _("Error: gpg key file decryption failed\n"));
+			return(NULL);
+		}
+		if(multiKeyMode) return(p);
+	}
+	i = strlen(p);
+	if(i < minLen) {
+		fprintf(stderr, _("Error: Password must be at least %d characters.\n"), minLen);
+		return(NULL);
+	}
+	seed = passSeedString;
+	if(!seed) seed = "";
+	s = malloc(i + strlen(seed) + 1);
+	if(!s) {
+		nomem:
+		fprintf(stderr, _("Error: Unable to allocate memory\n"));
+		return(NULL);
+	}
+	strcpy(s, p);
+	memset(p, 0, i);
+	if(ask2) {
+		p = getpass(_("Retype password: "));
+		if(!p) goto nomem;
+		if(strcmp(s, p)) {
+			compareErr:
+			fprintf(stderr, _("Error: Passwords are not identical\n"));
+			return(NULL);
+		}
+		memset(p, 0, i);
+	}
+	if(i < warnLen) {
+		fprintf(stderr, _("WARNING - Please use longer password (%d or more characters)\n"), LOOP_PASSWORD_MIN_LENGTH);
+	}
+	strcat(s, seed);
+	return(s);
+}
+
+/* this is for compatibility with historic loop-AES version */
+static void unhashed1_key_setup(unsigned char *keyStr, int ile, unsigned char *keyBuf, int bufSize)
+{
+	register int    x, y, z, cnt = ile;
+	unsigned char   *kp;
+
+	memset(keyBuf, 0, bufSize);
+	kp = keyStr;
+	for(x = 0; x < (bufSize * 8); x += 6) {
+		y = *kp++;
+		if(--cnt <= 0) {
+			kp = keyStr;
+			cnt = ile;
+		}
+		if((y >= '0') && (y <= '9')) y -= '0';
+		else if((y >= 'A') && (y <= 'Z')) y -= ('A' - 10);
+		else if((y >= 'a') && (y <= 'z')) y -= ('a' - 36);
+		else if((y == '.') || (y == '/')) y += (62 - '.');
+		else y &= 63;
+		z = x >> 3;
+		if(z < bufSize) {
+			keyBuf[z] |= y << (x & 7);
+		}
+		z++;
+		if(z < bufSize) {
+			keyBuf[z] |= y >> (8 - (x & 7));
+		}
+	}
+}
+
+/* this is for compatibility with mainline mount */
+static void unhashed2_key_setup(unsigned char *keyStr, int ile, unsigned char *keyBuf, int bufSize)
+{
+	memset(keyBuf, 0, bufSize);
+	strncpy((char *)keyBuf, (char *)keyStr, bufSize - 1);
+	keyBuf[bufSize - 1] = 0;
+}
+
+static void rmd160HashTwiceWithA(unsigned char *ib, int ile, unsigned char *ob, int ole)
+{
+	char tmpBuf[20 + 20];
+	char pwdCopy[130];
+
+	if(ole < 1) return;
+	memset(ob, 0, ole);
+	if(ole > 40) ole = 40;
+	__loDev_rmd160_hash_buffer(&tmpBuf[0], (char *)ib, ile);
+	pwdCopy[0] = 'A';
+	if(ile > (int)sizeof(pwdCopy) - 1) ile = sizeof(pwdCopy) - 1;
+	memcpy(pwdCopy + 1, ib, ile);
+	__loDev_rmd160_hash_buffer(&tmpBuf[20], pwdCopy, ile + 1);
+	memcpy(ob, tmpBuf, ole);
+	memset(tmpBuf, 0, sizeof(tmpBuf));
+	memset(pwdCopy, 0, sizeof(pwdCopy));
+}
+
+extern long long llseek(int, long long, int);
+
+static long long xx_lseek(int fd, long long offset, int whence)
+{
+	if(sizeof(off_t) >= 8) {
+		return lseek(fd, offset, whence);
+	} else {
+		return llseek(fd, offset, whence);
+	}
+}
+
+static int loop_create_random_keys(char *partition, long long offset, long long sizelimit, int loopro, unsigned char *k)
+{
+	int x, y, fd;
+	sha512_context s;
+	unsigned char b[4096];
+
+	if(loopro) {
+		fprintf(stderr, _("Error: read-only device %s\n"), partition);
+		return 1;
+	}
+
+	/*
+	 * Compute SHA-512 over first 40 KB of old fs data. SHA-512 hash
+	 * output is then used as entropy for new fs encryption key.
+	 */
+	if((fd = open(partition, O_RDWR)) == -1) {
+		seekFailed:
+		fprintf(stderr, _("Error: unable to open/seek device %s\n"), partition);
+		return 1;
+	}
+	if(offset < 0) offset = -offset;
+	if(xx_lseek(fd, offset, SEEK_SET) == -1) {
+		close(fd);
+		goto seekFailed;
+	}
+	__loDev_sha512_init(&s);
+	for(x = 1; x <= 10; x++) {
+		if((sizelimit > 0) && ((long long)(sizeof(b) * x) > sizelimit)) break;
+		if(rd_wr_retry(fd, (char *) &b[0], sizeof(b), 0) != sizeof(b)) break;
+		__loDev_sha512_write(&s, &b[0], sizeof(b));
+	}
+	__loDev_sha512_final(&s);
+
+	/*
+	 * Overwrite 40 KB of old fs data 20 times so that recovering
+	 * SHA-512 output beyond this point is difficult and expensive.
+	 */
+	for(y = 0; y < 20; y++) {
+		int z;
+		struct {
+			struct timeval tv;
+			unsigned char h[64];
+			int x,y,z;
+		} j;
+		if(xx_lseek(fd, offset, SEEK_SET) == -1) break;
+		memcpy(&j.h[0], &s.sha_out[0], 64);
+		gettimeofday(&j.tv, NULL);
+		j.y = y;
+		for(x = 1; x <= 10; x++) {
+			j.x = x;
+			for(z = 0; z < (int)sizeof(b); z += 64) {
+				j.z = z;
+				__loDev_sha512_hash_buffer((unsigned char *)&j, sizeof(j), &b[z], 64);
+			}
+			if((sizelimit > 0) && ((long long)(sizeof(b) * x) > sizelimit)) break;
+			if(rd_wr_retry(fd, (char *) &b[0], sizeof(b), 1) != sizeof(b)) break;
+		}
+		memset(&j, 0, sizeof(j));
+		if(fsync(fd)) break;
+	}
+	close(fd);
+
+	/*
+	 * Use all 512 bits of hash output
+	 */
+	memcpy(&b[0], &s.sha_out[0], 64);
+	memset(&s, 0, sizeof(s));
+
+	/*
+	 * Read 32 bytes of random entropy from kernel's random
+	 * number generator. This code may be executed early on startup
+	 * scripts and amount of random entropy may be non-existent.
+	 * SHA-512 of old fs data is used as workaround for missing
+	 * entropy in kernel's random number generator.
+	 */
+	if((fd = open("/dev/urandom", O_RDONLY)) == -1) {
+		fprintf(stderr, _("Error: unable to open /dev/urandom\n"));
+		return 1;
+	}
+	rd_wr_retry(fd, (char *) &b[64], 32, 0);
+
+	/* generate multi-key hashes */
+	x = 0;
+	while(x < 65) {
+		rd_wr_retry(fd, (char *) &b[64+32], 16, 0);
+		__loDev_sha512_hash_buffer(&b[0], 64+32+16, k, 32);
+		k += 32;
+		x++;
+	}
+
+	close(fd);
+	memset(&b[0], 0, sizeof(b));
+	return 0;
+}
+
+static int
+set_loop(const char *device, const char *file, int *loopro, int busyRetVal) {
+	struct loop_info64 loopinfo;
+	int fd, ffd, mode, i, errRetVal = 1;
+	char *pass, *apiName = NULL;
+	void (*hashFunc)(unsigned char *, int, unsigned char *, int);
+	unsigned char multiKeyBits[65][32];
+	int minPassLen = LOOP_PASSWORD_MIN_LENGTH;
+
+	sync();
+	loopFileName = (char *)file;
+	multiKeyMode = 0;
+	mode = (*loopro ? O_RDONLY : O_RDWR);
+	if ((ffd = open(file, mode)) < 0) {
+		if (!*loopro && errno == EROFS)
+			ffd = open(file, mode = O_RDONLY);
+		if (ffd < 0) {
+			perror(file);
+			return 1;
+		}
+	}
+	if ((fd = open(device, mode)) < 0) {
+		perror (device);
+		goto close_ffd_return1;
+	}
+	*loopro = (mode == O_RDONLY);
+
+	if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
+		if(errno == EBUSY)
+			errRetVal = busyRetVal;
+		if((errRetVal != 2) || verbose)
+			perror("ioctl: LOOP_SET_FD");
+keyclean_close_fd_ffd_return1:
+		memset(loopinfo.lo_encrypt_key, 0, sizeof(loopinfo.lo_encrypt_key));
+		memset(&multiKeyBits[0][0], 0, sizeof(multiKeyBits));
+		close (fd);
+close_ffd_return1:
+		close (ffd);
+		return errRetVal;
+	}
+
+	memset (&loopinfo, 0, sizeof (loopinfo));
+	strncpy ((char *)loopinfo.lo_file_name, file, LO_NAME_SIZE - 1);
+	loopinfo.lo_file_name[LO_NAME_SIZE - 1] = 0;
+	if (loopEncryptionType)
+		loopinfo.lo_encrypt_type = loop_crypt_type (loopEncryptionType, &loopinfo.lo_encrypt_key_size, &apiName);
+	if (loopOffsetBytes)
+		loopinfo.lo_offset = mystrtoull(loopOffsetBytes, 1);
+	if (loopSizeBytes)
+		loopinfo.lo_sizelimit = mystrtoull(loopSizeBytes, 0);
+
+#ifdef MCL_FUTURE
+	/*
+	 * Oh-oh, sensitive data coming up. Better lock into memory to prevent
+	 * passwd etc being swapped out and left somewhere on disk.
+	 */
+
+	if(loopinfo.lo_encrypt_type && mlockall(MCL_CURRENT | MCL_FUTURE)) {
+		perror("memlock");
+		ioctl (fd, LOOP_CLR_FD, 0);
+		fprintf(stderr, _("Couldn't lock into memory, exiting.\n"));
+		exit(1);
+	}
+#endif
+
+	switch (loopinfo.lo_encrypt_type) {
+	case LO_CRYPT_NONE:
+		loopinfo.lo_encrypt_key_size = 0;
+		break;
+	case LO_CRYPT_XOR:
+		pass = sGetPass (1, 0);
+		if(!pass) goto loop_clr_fd_out;
+		strncpy ((char *)loopinfo.lo_encrypt_key, pass, LO_KEY_SIZE - 1);
+		loopinfo.lo_encrypt_key[LO_KEY_SIZE - 1] = 0;
+		loopinfo.lo_encrypt_key_size = strlen((char*)loopinfo.lo_encrypt_key);
+		break;
+	case 3:   /* LO_CRYPT_FISH2 */
+	case 4:   /* LO_CRYPT_BLOW */
+	case 7:   /* LO_CRYPT_SERPENT */
+	case 8:   /* LO_CRYPT_MARS */
+	case 11:  /* LO_CRYPT_RC6 */
+	case 12:  /* LO_CRYPT_DES_EDE3 */
+	case 16:  /* LO_CRYPT_AES */
+	case 18:  /* LO_CRYPT_CRYPTOAPI */
+		/* set default hash function */
+		hashFunc = __loDev_sha256_hash_buffer;
+		if(loopinfo.lo_encrypt_key_size == 24) hashFunc = __loDev_sha384_hash_buffer;
+		if(loopinfo.lo_encrypt_key_size == 32) hashFunc = __loDev_sha512_hash_buffer;
+		/* possibly override default hash function */
+		if(passHashFuncName) {
+			if(!strcasecmp(passHashFuncName, "sha256")) {
+				hashFunc = __loDev_sha256_hash_buffer;
+			} else if(!strcasecmp(passHashFuncName, "sha384")) {
+				hashFunc = __loDev_sha384_hash_buffer;
+			} else if(!strcasecmp(passHashFuncName, "sha512")) {
+				hashFunc = __loDev_sha512_hash_buffer;
+			} else if(!strcasecmp(passHashFuncName, "rmd160")) {
+				hashFunc = rmd160HashTwiceWithA;
+				minPassLen = 1;
+			} else if(!strcasecmp(passHashFuncName, "unhashed1")) {
+				hashFunc = unhashed1_key_setup;
+			} else if(!strcasecmp(passHashFuncName, "unhashed2")) {
+				hashFunc = unhashed2_key_setup;
+				minPassLen = 1;
+			} else if(!strncasecmp(passHashFuncName, "random", 6) && ((passHashFuncName[6] == 0) || (passHashFuncName[6] == '/'))) {
+				/* random hash type sets up 65 random keys */
+				/* WARNING! DO NOT USE RANDOM HASH TYPE ON PARTITION WITH EXISTING */
+				/* IMPORTANT DATA ON IT. RANDOM HASH TYPE WILL DESTROY YOUR DATA.  */
+				if(loop_create_random_keys((char*)file, loopinfo.lo_offset, loopinfo.lo_sizelimit, *loopro, &multiKeyBits[0][0])) {
+					goto loop_clr_fd_out;
+				}
+				memcpy(&loopinfo.lo_encrypt_key[0], &multiKeyBits[0][0], sizeof(loopinfo.lo_encrypt_key));
+				multiKeyMode = 1000;
+				break; /* out of switch(loopinfo.lo_encrypt_type) */
+			}
+		}
+		pass = sGetPass (minPassLen, LOOP_PASSWORD_MIN_LENGTH);
+		if(!pass) goto loop_clr_fd_out;
+		i = strlen(pass);
+		if(hashFunc == unhashed1_key_setup) {
+			/* this is for compatibility with historic loop-AES version */
+			loopinfo.lo_encrypt_key_size = 16;             /* 128 bits */
+			if(i >= 32) loopinfo.lo_encrypt_key_size = 24; /* 192 bits */
+			if(i >= 43) loopinfo.lo_encrypt_key_size = 32; /* 256 bits */
+		}
+		(*hashFunc)((unsigned char *)pass, i, &loopinfo.lo_encrypt_key[0], sizeof(loopinfo.lo_encrypt_key));
+		if(multiKeyMode) {
+			int r = 0, t;
+			while(r < multiKeyMode) {
+				t = strlen(multiKeyPass[r]);
+				(*hashFunc)((unsigned char *)multiKeyPass[r], t, &multiKeyBits[r][0], 32);
+				memset(multiKeyPass[r], 0, t);
+				/*
+				 * MultiKeyMode uses md5 IV. One key mode uses sector IV. Sector IV
+				 * and md5 IV v2 and v3 are all computed differently. This first key
+				 * byte XOR with 0x55/0xF4 is needed to cause complete decrypt failure
+				 * in cases where data is encrypted with one type of IV and decrypted
+				 * with another type IV. If identical key was used but only IV was
+				 * computed differently, only first plaintext block of 512 byte CBC
+				 * chain would decrypt incorrectly and rest would decrypt correctly.
+				 * Partially correct decryption is dangerous. Decrypting all blocks
+				 * incorrectly is safer because file system mount will simply fail.
+				 */
+				if(multiKeyMode == 65) {
+					multiKeyBits[r][0] ^= 0xF4; /* version 3 */
+				} else {
+					multiKeyBits[r][0] ^= 0x55; /* version 2 */
+				}
+				r++;
+			}
+		} else if(passIterThousands) {
+			aes_context ctx;
+			unsigned long iter = 0;
+			unsigned char tempkey[32];
+			/*
+			 * Set up AES-256 encryption key using same password and hash function
+			 * as before but with password bit 0 flipped before hashing. That key
+			 * is then used to encrypt actual loop key 'itercountk' thousand times.
+			 */
+			pass[0] ^= 1;
+			(*hashFunc)((unsigned char *)pass, i, &tempkey[0], 32);
+			__loDev_aes_set_key(&ctx, &tempkey[0], 32, 0);
+			sscanf(passIterThousands, "%lu", &iter);
+			iter *= 1000;
+			while(iter > 0) {
+				/* encrypt both 128bit blocks with AES-256 */
+				__loDev_aes_encrypt(&ctx, &loopinfo.lo_encrypt_key[ 0], &loopinfo.lo_encrypt_key[ 0]);
+				__loDev_aes_encrypt(&ctx, &loopinfo.lo_encrypt_key[16], &loopinfo.lo_encrypt_key[16]);
+				/* exchange upper half of first block with lower half of second block */
+				memcpy(&tempkey[0], &loopinfo.lo_encrypt_key[8], 8);
+				memcpy(&loopinfo.lo_encrypt_key[8], &loopinfo.lo_encrypt_key[16], 8);
+				memcpy(&loopinfo.lo_encrypt_key[16], &tempkey[0], 8);
+				iter--;
+			}
+			memset(&ctx, 0, sizeof(ctx));
+			memset(&tempkey[0], 0, sizeof(tempkey));
+		}
+		memset(pass, 0, i);   /* erase original password */
+		break;
+	default:
+		fprintf (stderr, _("Error: don't know how to get key for encryption system %d\n"), loopinfo.lo_encrypt_type);
+		goto loop_clr_fd_out;
+	}
+
+	if(loInitValue) {
+		/* cipher modules are free to do whatever they want with this value */
+		i = 0;
+		sscanf(loInitValue, "%d", &i);
+		loopinfo.lo_init[0] = i;
+	}
+
+	/* type 18 == LO_CRYPT_CRYPTOAPI */
+	if ((loopinfo.lo_encrypt_type == 18) || (loop_set_status64_ioctl(fd, &loopinfo) < 0)) {
+		/* direct cipher interface failed - try CryptoAPI interface now */
+		if(!apiName || (try_cryptoapi_loop_interface(fd, &loopinfo, apiName) < 0)) {
+			fprintf(stderr, _("ioctl: LOOP_SET_STATUS: %s, requested cipher or key length (%d bits) not supported by kernel\n"), strerror(errno), loopinfo.lo_encrypt_key_size << 3);
+			loop_clr_fd_out:
+			(void) ioctl (fd, LOOP_CLR_FD, 0);
+			goto keyclean_close_fd_ffd_return1;
+		}
+	}
+	if(multiKeyMode >= 65) {
+		if(ioctl(fd, LOOP_MULTI_KEY_SETUP_V3, &multiKeyBits[0][0]) < 0) {
+			if(multiKeyMode == 1000) goto try_v2_setup;
+			perror("ioctl: LOOP_MULTI_KEY_SETUP_V3");
+			goto loop_clr_fd_out;
+		}
+	} else if(multiKeyMode == 64) {
+		try_v2_setup:
+		if((ioctl(fd, LOOP_MULTI_KEY_SETUP, &multiKeyBits[0][0]) < 0) && (multiKeyMode != 1000)) {
+			perror("ioctl: LOOP_MULTI_KEY_SETUP");
+			goto loop_clr_fd_out;
+		}
+	}
+
+	memset(loopinfo.lo_encrypt_key, 0, sizeof(loopinfo.lo_encrypt_key));
+	memset(&multiKeyBits[0][0], 0, sizeof(multiKeyBits));
+	close (fd);
+	close (ffd);
+
+	if (verbose > 1)
+		printf(_("set_loop(%s,%s): success\n"), device, file);
+	return 0;
+}
+
+#include <getopt.h>
+#include <stdarg.h>
+
+static char *progname;
+
+static void
+usage(void) {
+	fprintf(stderr, _("usage:\n\
+  %s [options] loop_device file        # setup\n\
+  %s -F [options] loop_device [file]   # setup, read /etc/fstab\n\
+  %s loop_device                       # give info\n\
+  %s -a                                # give info of all loops\n\
+  %s -f                                # show next free loop device\n\
+  %s -d loop_device                    # delete\n\
+  %s -R loop_device                    # resize\n\
+options:  -e encryption  -o offset  -s sizelimit  -p passwdfd  -T  -S pseed\n\
+          -H phash  -I loinit  -K gpgkey  -G gpghome  -C itercountk  -v  -r\n\
+          -P cleartextkey\n"),
+		progname, progname, progname, progname, progname, progname, progname);
+	exit(1);
+}
+
+static void
+show_all_loops(void)
+{
+	char dev[20];
+	char *lfmt[] = { "/dev/loop%d", "/dev/loop/%d" };
+	int i, j, fd, x;
+	struct stat statbuf;
+
+	for(i = 0; i < 256; i++) {
+		for(j = (sizeof(lfmt) / sizeof(lfmt[0])) - 1; j >= 0; j--) {
+			sprintf(dev, lfmt[j], i);
+			if(stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
+				fd = open(dev, O_RDONLY);
+				if(fd >= 0) {
+					x = is_unused_loop_device(fd);
+					close(fd);
+					if(x == 0) {
+						show_loop(dev);
+						j = 0;
+					}
+				}
+			}
+		}
+	}
+}
+
+static int
+read_options_from_fstab(char *loopToFind, char **partitionPtr)
+{
+	FILE *f;
+	struct mntent *m;
+	int y, foundMatch = 0;
+	char *opt, *fr1, *fr2;
+	struct options {
+		char *name;	/* name of /etc/fstab option */
+		char **dest;	/* destination where it is written to */
+		char *line;	/* temp */
+	};
+	struct options tbl[] = {
+		{ "device/file name ",	partitionPtr },	/* must be index 0 */
+		{ "loop=",		&loopToFind },	/* must be index 1 */
+		{ "offset=",		&loopOffsetBytes },
+		{ "sizelimit=",		&loopSizeBytes },
+		{ "encryption=",	&loopEncryptionType },
+		{ "pseed=",		&passSeedString },
+		{ "phash=",		&passHashFuncName },
+		{ "loinit=",		&loInitValue },
+		{ "gpgkey=",		&gpgKeyFile },
+		{ "gpghome=",		&gpgHomeDir },
+		{ "cleartextkey=",	&clearTextKeyFile },
+		{ "itercountk=",	&passIterThousands },
+	};
+	struct options *p;
+
+	if (!(f = setmntent("/etc/fstab", "r"))) {
+		fprintf(stderr, _("Error: unable to open /etc/fstab for reading\n"));
+		return 0;
+	}
+	while ((m = getmntent(f)) != NULL) {
+		tbl[0].line = fr1 = xstrdup(m->mnt_fsname);
+		p = &tbl[1];
+		do {
+			p->line = NULL;
+		} while (++p < &tbl[sizeof(tbl) / sizeof(struct options)]);
+		opt = fr2 = xstrdup(m->mnt_opts);
+		for (opt = strtok(opt, ","); opt != NULL; opt = strtok(NULL, ",")) {
+			p = &tbl[1];
+			do {
+				y = strlen(p->name);
+				if (!strncmp(opt, p->name, y))
+					p->line = opt + y;
+			} while (++p < &tbl[sizeof(tbl) / sizeof(struct options)]);
+		}
+		if (tbl[1].line && !strcmp(loopToFind, tbl[1].line)) {
+			if (++foundMatch > 1) {
+				fprintf(stderr, _("Error: multiple loop=%s options found in /etc/fstab\n"), loopToFind);
+				endmntent(f);
+				return 0;
+			}
+			p = &tbl[0];
+			do {
+				if (!*p->dest && p->line) {
+					*p->dest = p->line;
+					if (verbose)
+						printf(_("using %s%s from /etc/fstab\n"), p->name, p->line);
+				}
+			} while (++p < &tbl[sizeof(tbl) / sizeof(struct options)]);
+			fr1 = fr2 = NULL;
+		}
+		if(fr1) free(fr1);
+		if(fr2) free(fr2);
+	}
+	endmntent(f);
+	if (foundMatch == 0) {
+		fprintf(stderr, _("Error: loop=%s option not found in /etc/fstab\n"), loopToFind);
+	}
+	return foundMatch;
+}
+
+static int
+recompute_loop_dev_size(char *device)
+{
+	int fd, err1 = 0, err2, err3;
+	long long oldBytes = -1, newBytes = -1;
+
+	fd = open(device, O_RDONLY);
+	if(fd < 0) {
+		perror(device);
+		return 1;
+	}
+	if(verbose) {
+		err1 = ioctl(fd, BLKGETSIZE64, &oldBytes);
+	}
+	err2 = ioctl(fd, LOOP_RECOMPUTE_DEV_SIZE, 0);
+	if(err2) {
+		perror(device);
+		goto done1;
+	}
+	if(verbose) {
+		err3 = ioctl(fd, BLKGETSIZE64, &newBytes);
+		if(!err1 && (oldBytes >= 0)) {
+			printf("%s: old size %lld bytes\n", device, oldBytes);
+		}
+		if(!err3 && (newBytes >= 0)) {
+			printf("%s: new size %lld bytes\n", device, newBytes);
+		}
+	}
+done1:
+	close(fd);
+	return err2;
+}
+
+static int 
+del_loop (const char *device) {
+	int fd;
+
+	sync();
+	if ((fd = open (device, O_RDONLY)) < 0) {
+		int errsv = errno;
+		fprintf(stderr, _("loop: can't delete device %s: %s\n"),
+			device, strerror (errsv));
+		return 1;
+	}
+	if (ioctl (fd, LOOP_CLR_FD, 0) < 0) {
+		perror ("ioctl: LOOP_CLR_FD");
+		return 1;
+	}
+	close (fd);
+	if (verbose > 1)
+		printf(_("del_loop(%s): success\n"), device);
+	return 0;
+}
+
+int
+main(int argc, char **argv) {
+	char *partitionName = NULL;
+	char *device = NULL;
+	int delete,find,c,option_a=0,option_F=0,option_R=0,setup_o=0;
+	int res = 0;
+	int ro = 0;
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+
+	delete = find = 0;
+	progname = argv[0];
+	while ((c = getopt(argc,argv,"aC:de:fFG:H:I:K:o:p:P:rRs:S:Tv")) != -1) {
+		switch (c) {
+		case 'a':		/* show status of all loops */
+			option_a = 1;
+			break;
+		case 'C':
+			passIterThousands = optarg;
+			setup_o = 1;
+			break;
+		case 'd':
+			delete = 1;
+			break;
+		case 'e':
+			loopEncryptionType = optarg;
+			setup_o = 1;
+			break;
+		case 'f':		/* find free loop */
+			find = 1;
+			break;
+		case 'F':		/* read loop related options from /etc/fstab */
+			option_F = 1;
+			setup_o = 1;
+			break;
+		case 'G':               /* GnuPG home dir */
+			gpgHomeDir = optarg;
+			setup_o = 1;
+			break;
+		case 'H':               /* passphrase hash function name */
+			passHashFuncName = optarg;
+			setup_o = 1;
+			break;
+		case 'I':               /* lo_init[0] value (in string form)  */
+			loInitValue = optarg;
+			setup_o = 1;
+			break;
+		case 'K':               /* GnuPG key file name */
+			gpgKeyFile = optarg;
+			setup_o = 1;
+			break;
+		case 'o':
+			loopOffsetBytes = optarg;
+			setup_o = 1;
+			break;
+		case 'p':               /* read passphrase from given fd */
+			passFDnumber = optarg;
+			setup_o = 1;
+			break;
+		case 'P':               /* read passphrase from given file */
+			clearTextKeyFile = optarg;
+			setup_o = 1;
+			break;
+		case 'r':               /* read-only */
+			ro = 1;
+			setup_o = 1;
+			break;
+		case 'R':               /* recompute loop dev size */
+			option_R = 1;
+			break;
+		case 's':
+			loopSizeBytes = optarg;
+			setup_o = 1;
+			break;
+		case 'S':               /* optional seed for passphrase */
+			passSeedString = optarg;
+			setup_o = 1;
+			break;
+		case 'T':               /* ask passphrase _twice_ */
+			passAskTwice = "T";
+			setup_o = 1;
+			break;
+		case 'v':
+			verbose++;
+			break;
+		default:
+			usage();
+		}
+	}
+	if (option_a + delete + option_R + setup_o + find > 1) usage();
+	if (option_a) {
+		/* show all loops */
+		if (argc != optind) usage();
+		show_all_loops();
+		res = 0;
+	} else if (find) {
+		if (argc != optind)
+			usage();
+		device = find_unused_loop_device();
+		if (device == NULL)
+			return -1;
+		if (verbose)
+			printf("Loop device is %s\n", device);
+		printf("%s\n", device);
+		res = 0;
+	} else if (delete) {
+		/* delete loop */
+		if (argc != optind+1) usage();
+		res = del_loop(argv[optind]);
+	} else if (option_R) {
+		/* resize existing loop */
+		if (argc != optind+1) usage();
+		res = recompute_loop_dev_size(argv[optind]);
+	} else if ((argc == optind+1) && !setup_o) {
+		/* show one loop */
+		res = show_loop(argv[optind]);
+	} else {
+		/* set up new loop */
+		if ((argc < optind+1) || ((argc == optind+1) && !option_F) || (argc > optind+2))
+			usage();
+		if (argc > optind+1)
+			partitionName = argv[optind+1];
+		if (option_F && (read_options_from_fstab(argv[optind], &partitionName) != 1))
+			exit(1);
+		res = set_loop(argv[optind],partitionName,&ro, 1);
+	}
+	return res;
+}
diff -urN util-linux-2.29.2/sys-utils/mount.8 util-linux-2.29.2-AES/sys-utils/mount.8
--- util-linux-2.29.2/sys-utils/mount.8	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/mount.8	2017-03-10 17:02:59.000000000 +0200
@@ -649,6 +649,11 @@
 sections.
 .RE
 
+.IP "\fB\-p, \-\-pass\-fd \fInum\fP"
+In case of a loop mount with encryption, read the passphrase from
+file descriptor
+.I num
+instead of from the terminal.
 .TP
 .BR \-R , " \-\-rbind"
 Remount a subtree and all possible submounts somewhere else (so that its
@@ -2922,13 +2927,19 @@
 .B "mount \-t ext3 /tmp/disk.img /mnt"
 .sp
 .RE
-This type of mount knows about three options, namely
-.BR loop ", " offset " and " sizelimit ,
+This type of mount knows about 11 options, namely
+.BR loop ", " offset ", " sizelimit ", " encryption ", " pseed ", " phash ", " loinit ", " gpgkey ", " gpghome ", " cleartextkey " and " itercountk
 that are really options to
 .BR \%losetup (8).
 (These options can be used in addition to those specific
 to the filesystem type.)
 
+If the mount requires a passphrase, you will be prompted for one unless you
+specify a file descriptor to read from instead with the
+.BR \-p
+command line option, or specify a file name with
+.BR cleartextkey
+mount option.
 Since Linux 2.6.25 auto-destruction of loop devices is supported,
 meaning that any loop device allocated by
 .B mount
diff -urN util-linux-2.29.2/sys-utils/mount.c util-linux-2.29.2-AES/sys-utils/mount.c
--- util-linux-2.29.2/sys-utils/mount.c	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/mount.c	2017-03-10 17:02:59.000000000 +0200
@@ -36,6 +36,7 @@
 #include "c.h"
 #include "env.h"
 #include "strutils.h"
+#include "xgetpass.h"
 #include "exitcodes.h"
 #include "xalloc.h"
 #include "closestream.h"
@@ -51,6 +52,7 @@
  *  --options-source-force				MNT_OMODE_FORCE
  */
 
+static int passfd = -1;
 static int readwrite;
 
 static int mk_exit_code(struct libmnt_context *cxt, int rc);
@@ -103,6 +105,32 @@
 	return 1;
 }
 
+static char *encrypt_pass_get(struct libmnt_context *cxt)
+{
+	if (!cxt)
+		return 0;
+
+#ifdef MCL_FUTURE
+	if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
+		warn(_("couldn't lock into memory"));
+		return NULL;
+	}
+#endif
+	return xgetpass(passfd, _("Password: "));
+}
+
+static void encrypt_pass_release(struct libmnt_context *cxt
+			__attribute__((__unused__)), char *pwd)
+{
+	char *p = pwd;
+
+	while (p && *p)
+		*p++ = '\0';
+
+	free(pwd);
+	munlockall();
+}
+
 /*
  * Replace control chars with '?' to be compatible with coreutils. For more
  * robust solution use findmnt(1) where we use \x?? hex encoding.
@@ -759,6 +787,7 @@
 	fprintf(out, _(
 	" -o, --options <list>    comma-separated list of mount options\n"
 	" -O, --test-opts <list>  limit the set of filesystems (use with -a)\n"
+	" -p, --pass-fd <num>     read the passphrase from file descriptor\n"
 	" -r, --read-only         mount the filesystem read-only (same as -o ro)\n"
 	" -t, --types <list>      limit the set of filesystem types\n"));
 	fprintf(out, _(
@@ -888,7 +917,7 @@
 
 	mnt_context_set_tables_errcb(cxt, table_parser_errcb);
 
-	while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:rRsU:vVwt:T:",
+	while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:p:rRsU:vVwt:T:",
 					longopts, NULL)) != -1) {
 
 		/* only few options are allowed for non-root users */
@@ -943,6 +972,10 @@
 			if (mnt_context_set_options_pattern(cxt, optarg))
 				err(MOUNT_EX_SYSERR, _("failed to set options pattern"));
 			break;
+		case 'p':
+                        passfd = strtou32_or_err(optarg,
+                        		_("invalid passphrase file descriptor"));
+			break;
 		case 'L':
 			xasprintf(&srcbuf, "LABEL=\"%s\"", optarg);
 			mnt_context_disable_swapmatch(cxt, 1);
@@ -1058,6 +1091,8 @@
 	else if (types)
 		mnt_context_set_fstype(cxt, types);
 
+	mnt_context_set_passwd_cb(cxt, encrypt_pass_get, encrypt_pass_release);
+
 	if (all) {
 		/*
 		 * A) Mount all
diff -urN util-linux-2.29.2/sys-utils/swapoff.c util-linux-2.29.2-AES/sys-utils/swapoff.c
--- util-linux-2.29.2/sys-utils/swapoff.c	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/swapoff.c	2017-03-10 17:02:59.000000000 +0200
@@ -1,4 +1,9 @@
 #include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
 #include <errno.h>
 #include <getopt.h>
 
@@ -7,6 +12,7 @@
 #endif
 
 #include "nls.h"
+#include "loop.h"
 #include "c.h"
 #include "xalloc.h"
 #include "closestream.h"
@@ -144,6 +150,45 @@
 	exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
 }
 
+static void
+shutdown_encrypted_swap(char *loop)
+{
+	int fd;
+	struct stat statbuf;
+	struct loop_info64 loopinfo;
+	unsigned char b[32];
+	FILE *f;
+	size_t ignoreThis = 0;
+
+	if(stat(loop, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
+		if((fd = open(loop, O_RDWR)) >= 0) {
+			if(!loop_get_status64_ioctl(fd, &loopinfo)) {
+				/*
+				 * Read 32 bytes of random data from kernel's random
+				 * number generator and write that to loop device.
+				 * This preserves some of kernel's random entropy
+				 * to next activation of encrypted swap on this
+				 * partition.
+				 */
+				if((f = fopen("/dev/urandom", "r")) != NULL) {
+					ignoreThis += fread(&b[0], 32, 1, f);
+					fclose(f);
+					ignoreThis += write(fd, &b[0], 32);
+					fsync(fd);
+				}
+			}
+			close(fd);
+		}
+		sync();
+		if((fd = open(loop, O_RDONLY)) >= 0) {
+			if(!loop_get_status64_ioctl(fd, &loopinfo)) {
+				ioctl(fd, LOOP_CLR_FD, 0);
+			}
+			close(fd);
+		}
+	}
+}
+
 static int swapoff_all(void)
 {
 	int status = 0;
@@ -174,8 +219,30 @@
 	mnt_reset_iter(itr, MNT_ITER_FORWARD);
 
 	while (tb && mnt_table_find_next_fs(tb, itr, match_swap, NULL, &fs) == 0) {
-		if (!is_active_swap(mnt_fs_get_source(fs)))
-			do_swapoff(mnt_fs_get_source(fs), QUIET, !CANONIC);
+		char *special;
+		char *loop = NULL, *encryption = NULL;
+		char *val = NULL;
+		size_t len = 0;
+
+		special = (char *) mnt_fs_get_source(fs);
+		if(!special) continue;
+		if(mnt_fs_get_option(fs, "loop", &val, &len) == 0 && val && len)
+			loop = strndup(val, len);
+		if(mnt_fs_get_option(fs, "encryption", &val, &len) == 0 && val && len)
+			encryption = strndup(val, len);
+		if (loop && encryption) {
+			if (!is_active_swap(loop)) {	/* do this only if it was not in /proc/swaps */
+				do_swapoff(loop, QUIET, !CANONIC);
+			}
+			shutdown_encrypted_swap(loop);
+			goto do_free;
+		}
+		if (!is_active_swap(special)) {		/* do this only if it was not in /proc/swaps */
+			do_swapoff(special, QUIET, !CANONIC);
+		}
+		do_free:
+		if(loop) free(loop);
+		if(encryption) free(encryption);
 	}
 
 	mnt_free_iter(itr);
diff -urN util-linux-2.29.2/sys-utils/swapon.8 util-linux-2.29.2-AES/sys-utils/swapon.8
--- util-linux-2.29.2/sys-utils/swapon.8	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/swapon.8	2017-03-10 17:02:59.000000000 +0200
@@ -69,6 +69,22 @@
 .I /proc/swaps
 or
 .IR /etc/fstab ).
+.PP
+If
+.I loop=/dev/loop?
+and
+.I encryption=AES128
+options are present in
+.I /etc/fstab
+then
+.BR "swapon -a"
+will set up loop devices using random keys, run
+.BR "mkswap"
+on them, and enable encrypted swap on specified loop devices. Encrypted loop
+devices are set up with page size offset so that unencrypted swap signatures
+on first page of swap devices are not touched.
+.BR "swapoff -a"
+will tear down such loop devices.
 
 .SH OPTIONS
 .TP
diff -urN util-linux-2.29.2/sys-utils/swapon.c util-linux-2.29.2-AES/sys-utils/swapon.c
--- util-linux-2.29.2/sys-utils/swapon.c	2017-02-22 12:16:55.000000000 +0200
+++ util-linux-2.29.2-AES/sys-utils/swapon.c	2017-03-10 17:02:59.000000000 +0200
@@ -8,6 +8,8 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
 #include <fcntl.h>
 #include <stdint.h>
 #include <ctype.h>
@@ -16,6 +18,8 @@
 
 #include "c.h"
 #include "nls.h"
+#include "loop.h"
+#include "../libmount/src/sha512.h"
 #include "bitops.h"
 #include "blkdev.h"
 #include "pathnames.h"
@@ -718,6 +722,227 @@
 }
 
 
+static int
+prepare_encrypted_swap(char *partition, char *loop, char *encryption)
+{
+	int x, y, fd, ffd;
+	int page_size;
+	sha512_context s;
+	unsigned char b[4096], multiKeyBits[65][32];
+	char *a[10], *apiName;
+	struct loop_info64 loopinfo;
+	FILE *f;
+	size_t ignoreThis = 0;
+
+	/*
+	 * Some sanity checks
+	 */
+	if(strlen(partition) < 1) {
+		fprintf(stderr, _("swapon: invalid swap device name\n"));
+		return 0;
+	}
+	if(strlen(loop) < 1) {
+		fprintf(stderr, _("swapon: invalid loop device name\n"));
+		return 0;
+	}
+	if(strlen(encryption) < 1) {
+		fprintf(stderr, _("swapon: invalid encryption type\n"));
+		return 0;
+	}
+
+	/*
+	 * Abort if loop device does not exist or is already in use
+	 */
+	sync();
+	if((fd = open(loop, O_RDWR)) == -1) {
+		fprintf(stderr, _("swapon: unable to open loop device %s\n"), loop);
+		return 0;
+	}
+	if(is_unused_loop_device(fd) == 0) {
+		fprintf(stderr, _("swapon: loop device %s already in use\n"), loop);
+		goto errout0;
+	}
+
+	/*
+	 * Compute SHA-512 over first 40 KB of old swap data. This data
+	 * is mostly unknown data encrypted using unknown key. SHA-512 hash
+	 * output is then used as entropy for new swap encryption key.
+	 */
+	if(!(f = fopen(partition, "r+"))) {
+		fprintf(stderr, _("swapon: unable to open swap device %s\n"), partition);
+		goto errout0;
+	}
+	page_size = getpagesize();
+	fseek(f, (long)page_size, SEEK_SET);
+	__loDev_sha512_init(&s);
+	for(x = 0; x < 10; x++) {
+		if(fread(&b[0], sizeof(b), 1, f) != 1) break;
+		__loDev_sha512_write(&s, &b[0], sizeof(b));
+	}
+	__loDev_sha512_final(&s);
+
+	/*
+	 * Overwrite 40 KB of old swap data 20 times so that recovering
+	 * SHA-512 output beyond this point is difficult and expensive.
+	 */
+	for(y = 0; y < 20; y++) {
+		int z;
+		struct {
+			struct timeval tv;
+			unsigned char h[64];
+			int x,y,z;
+		} j;
+		if(fseek(f, (long)page_size, SEEK_SET)) break;
+		memcpy(&j.h[0], &s.sha_out[0], 64);
+		gettimeofday(&j.tv, NULL);
+		j.y = y;
+		for(x = 0; x < 10; x++) {
+			j.x = x;
+			for(z = 0; z < (int) sizeof(b); z += 64) {
+				j.z = z;
+				__loDev_sha512_hash_buffer((unsigned char *)&j, sizeof(j), &b[z], 64);
+			}
+			if(fwrite(&b[0], sizeof(b), 1, f) != 1) break;
+		}
+		memset(&j, 0, sizeof(j));
+		if(fflush(f)) break;
+		if(fsync(fileno(f))) break;
+	}
+	fclose(f);
+
+	/*
+	 * Use all 512 bits of hash output
+	 */
+	memcpy(&b[0], &s.sha_out[0], 64);
+	memset(&s, 0, sizeof(s));
+
+	/*
+	 * Read 32 bytes of random entropy from kernel's random
+	 * number generator. This code may be executed early on startup
+	 * scripts and amount of random entropy may be non-existent.
+	 * SHA-512 of old swap data is used as workaround for missing
+	 * entropy in kernel's random number generator.
+	 */
+	if(!(f = fopen("/dev/urandom", "r"))) {
+		fprintf(stderr, _("swapon: unable to open /dev/urandom\n"));
+		goto errout0;
+	}
+	ignoreThis += fread(&b[64], 32, 1, f);
+
+	/*
+	 * Set up struct loop_info64
+	 */
+	if((ffd = open(partition, O_RDWR)) < 0) {
+		fprintf(stderr, _("swapon: unable to open swap device %s\n"), partition);
+		goto errout1;
+	}
+	memset(&loopinfo, 0, sizeof(loopinfo));
+	strncpy((char *)loopinfo.lo_file_name, partition, LO_NAME_SIZE - 1);
+	loopinfo.lo_file_name[LO_NAME_SIZE - 1] = 0;
+	loopinfo.lo_encrypt_type = loop_crypt_type(encryption, &loopinfo.lo_encrypt_key_size, &apiName);
+	if(loopinfo.lo_encrypt_type <= 1) {
+		fprintf(stderr, _("swapon: unsupported swap encryption type %s\n"), encryption);
+errout2:
+		close(ffd);
+errout1:
+		fclose(f);
+errout0:
+		close(fd);
+		memset(&loopinfo.lo_encrypt_key[0], 0, sizeof(loopinfo.lo_encrypt_key));
+		memset(&multiKeyBits[0][0], 0, sizeof(multiKeyBits));
+		return 0;
+	}
+	loopinfo.lo_offset = page_size;
+	/* single-key hash */
+	__loDev_sha512_hash_buffer(&b[0], 64+32, &loopinfo.lo_encrypt_key[0], sizeof(loopinfo.lo_encrypt_key));
+	/* multi-key hash */
+	x = 0;
+	while(x < 65) {
+		ignoreThis += fread(&b[64+32], 16, 1, f);
+		__loDev_sha512_hash_buffer(&b[0], 64+32+16, &multiKeyBits[x][0], 32);
+		x++;
+	}	
+
+	/*
+	 * Try to set up single-key loop
+	 */
+	if(ioctl(fd, LOOP_SET_FD, ffd) < 0) {
+		fprintf(stderr, _("swapon: LOOP_SET_FD failed\n"));
+		goto errout2;
+	}
+	if ((loopinfo.lo_encrypt_type == 18) || (loop_set_status64_ioctl(fd, &loopinfo) < 0)) {
+		if(try_cryptoapi_loop_interface(fd, &loopinfo, apiName) < 0) {
+			fprintf(stderr, _("swapon: LOOP_SET_STATUS failed\n"));
+			ioctl(fd, LOOP_CLR_FD, 0);
+			goto errout2;
+		}
+	}
+
+	/*
+	 * Try to put loop to multi-key v3 or v2 mode.
+	 * If this fails, then let it operate in single-key mode.
+	 */
+	if(ioctl(fd, LOOP_MULTI_KEY_SETUP_V3, &multiKeyBits[0][0]) < 0) {
+		ioctl(fd, LOOP_MULTI_KEY_SETUP, &multiKeyBits[0][0]);
+	}
+
+	/*
+	 * Loop is now set up. Clean up the keys.
+	 */
+	memset(&loopinfo.lo_encrypt_key[0], 0, sizeof(loopinfo.lo_encrypt_key));
+	memset(&multiKeyBits[0][0], 0, sizeof(multiKeyBits));
+	close(ffd);
+	fclose(f);
+	close(fd);
+
+	/*
+	 * Write 40 KB of zeroes to loop device. That same data is written
+	 * to underlying partition in encrypted form. This is done to guarantee
+	 * that next time encrypted swap is initialized, the SHA-512 hash will
+	 * be different. And, if encrypted swap data writes over this data, that's
+	 * even better.
+	 */
+	if(!(f = fopen(loop, "r+"))) {
+		fprintf(stderr, _("swapon: unable to open loop device %s\n"), loop);
+		return 0;
+	}
+	memset(&b[0], 0, sizeof(b));
+	for(x = 0; x < 10; x++) {
+		if(fwrite(&b[0], sizeof(b), 1, f) != 1) break;
+	}
+	fflush(f);
+	fsync(fileno(f));
+	fclose(f);
+	sync();
+
+	/*
+	 * Run mkswap on loop device so that kernel understands it as swap.
+	 * Redirect stderr to /dev/null and ignore exit value.
+	 */
+	if(!(x = fork())) {
+		if((x = open("/dev/null", O_WRONLY)) >= 0) {
+			dup2(x, 2);
+			close(x);
+		}
+		a[0] = "mkswap";
+		a[1] = loop;
+		a[2] = 0;
+		execvp(a[0], &a[0]);
+		execv("/sbin/mkswap", &a[0]);
+		/* error to stdout, stderr is directed to /dev/null */
+		printf(_("swapon: unable to execute mkswap\n"));
+		exit(1);
+	}
+	if(x == -1) {
+		fprintf(stderr, _("swapon: fork failed\n"));
+		return 0;
+	}
+	waitpid(x, &y, 0);
+	sync();
+
+	return 1;
+}
+
 static int swapon_all(struct swapon_ctl *ctl)
 {
 	struct libmnt_table *tb = get_fstab();
@@ -735,6 +960,9 @@
 	while (mnt_table_find_next_fs(tb, itr, match_swap, NULL, &fs) == 0) {
 		/* defaults */
 		const char *opts;
+		char *loop = NULL, *encryption = NULL;
+		char *val = NULL;
+		size_t len = 0;
 		const char *device;
 		struct swap_prop prop;		/* per device setting */
 
@@ -743,6 +971,10 @@
 				warnx(_("%s: noauto option -- ignored"), mnt_fs_get_source(fs));
 			continue;
 		}
+		if(mnt_fs_get_option(fs, "loop", &val, &len) == 0 && val && len)
+			loop = strndup(val, len);
+		if(mnt_fs_get_option(fs, "encryption", &val, &len) == 0 && val && len)
+			encryption = strndup(val, len);
 
 		/* default setting */
 		prop = ctl->props;
@@ -757,23 +989,38 @@
 		if (!device) {
 			if (!prop.no_fail)
 				status |= cannot_find(mnt_fs_get_source(fs));
-			continue;
+			goto do_free;
+		}
+
+		if (loop && encryption) {
+			if (!is_active_swap(loop) && (!prop.no_fail || !access(device, R_OK))) {
+				if(!prepare_encrypted_swap((char*)device, loop, encryption)) {
+					status |= -1;
+					goto do_free;
+				}
+				status |= do_swapon(ctl, &prop, loop, TRUE);
+			}
+			goto do_free;
 		}
 
 		if (is_active_swap(device)) {
 			if (ctl->verbose)
 				warnx(_("%s: already active -- ignored"), device);
-			continue;
+			goto do_free;
 		}
 
 		if (prop.no_fail && access(device, R_OK) != 0) {
 			if (ctl->verbose)
 				warnx(_("%s: inaccessible -- ignored"), device);
-			continue;
+			goto do_free;
 		}
 
 		/* swapon */
 		status |= do_swapon(ctl, &prop, device, TRUE);
+
+		do_free:
+		if(loop) free(loop);
+		if(encryption) free(encryption);
 	}
 
 	mnt_free_iter(itr);