From 0939fef502c4b97d1facc7972a54d5dfeba4ab71 Mon Sep 17 00:00:00 2001
From: John Lane <john@lane.uk.net>
Date: Fri, 26 Jun 2015 22:48:03 +0100
Subject: [PATCH 5/7] Cryptomount support for hyphens in UUID

---
 grub-core/disk/cryptodisk.c | 20 +++++++++++++++++---
 grub-core/disk/luks.c       | 26 ++++++++------------------
 include/grub/cryptodisk.h   |  2 ++
 3 files changed, 27 insertions(+), 21 deletions(-)

diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
index 7f656f75c..c442d3a34 100644
--- a/grub-core/disk/cryptodisk.c
+++ b/grub-core/disk/cryptodisk.c
@@ -114,6 +114,20 @@ gf_mul_be (grub_uint8_t *o, const grub_uint8_t *a, const grub_uint8_t *b)
     }
 }
 
+int
+grub_cryptodisk_uuidcmp(char *uuid_a, char *uuid_b)
+{
+  while ((*uuid_a != '\0') && (*uuid_b != '\0'))
+    {
+      while (*uuid_a == '-') uuid_a++;
+      while (*uuid_b == '-') uuid_b++;
+      if (grub_toupper(*uuid_a) != grub_toupper(*uuid_b)) break;
+      uuid_a++;
+      uuid_b++;
+    }
+  return (*uuid_a == '\0') && (*uuid_b == '\0');
+}
+
 static gcry_err_code_t
 grub_crypto_pcbc_decrypt (grub_crypto_cipher_handle_t cipher,
 			 void *out, void *in, grub_size_t size,
@@ -509,8 +523,8 @@ grub_cryptodisk_open (const char *name, grub_disk_t disk)
   if (grub_memcmp (name, "cryptouuid/", sizeof ("cryptouuid/") - 1) == 0)
     {
       for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
-	if (grub_strcasecmp (name + sizeof ("cryptouuid/") - 1, dev->uuid) == 0)
-	  break;
+        if (grub_cryptodisk_uuidcmp(name + sizeof ("cryptouuid/") - 1, dev->uuid))
+          break;
     }
   else
     {
@@ -742,7 +756,7 @@ grub_cryptodisk_get_by_uuid (const char *uuid)
 {
   grub_cryptodisk_t dev;
   for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
-    if (grub_strcasecmp (dev->uuid, uuid) == 0)
+    if (grub_cryptodisk_uuidcmp(dev->uuid, uuid))
       return dev;
   return NULL;
 }
diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
index 4ebe21b4e..80a760670 100644
--- a/grub-core/disk/luks.c
+++ b/grub-core/disk/luks.c
@@ -127,6 +109,14 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
   ciphermode[sizeof (header.cipherMode)] = 0;
   grub_memcpy (hashspec, header.hashSpec, sizeof (header.hashSpec));
   hashspec[sizeof (header.hashSpec)] = 0;
+  grub_memcpy (uuid, header.uuid, sizeof (header.uuid));
+  uuid[sizeof (header.uuid)] = 0;
+
+  if ( check_uuid && ! grub_cryptodisk_uuidcmp(check_uuid, uuid))
+    {
+      grub_dprintf ("luks", "%s != %s\n", uuid, check_uuid);
+      return NULL;
+    }
 
   newdev = grub_cryptodisk_create (disk, uuid, ciphername, ciphermode, hashspec);
 
diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
index bb25ab730..01c02696e 100644
--- a/include/grub/cryptodisk.h
+++ b/include/grub/cryptodisk.h
@@ -168,4 +168,6 @@ grub_cryptodisk_t grub_cryptodisk_get_by_source_disk (grub_disk_t disk);
 grub_cryptodisk_t grub_cryptodisk_create (grub_disk_t disk, char *uuid,
 				   char *ciphername, char *ciphermode, char *digest);
 
+int
+grub_cryptodisk_uuidcmp(char *uuid_a, char *uuid_b);
 #endif
-- 
2.16.2