diff options
Diffstat (limited to 'rc4.h')
| -rw-r--r-- | rc4.h | 62 |
1 files changed, 1 insertions, 61 deletions
@@ -20,70 +20,10 @@ char* rc4_getPassword(void); /** - * Precondition: keySchedule is an int array of size 256 and key is a valid string - * Postcondition: keySchedule values have been initialized by the RC4 key-scheduling algorithm. - * Performs the RC4 key exchange with keylength 256. Pseudocode example: - * for i from 0 to 255 - * S[i] := i - * endfor - * j := 0 - * for i from 0 to 255 - * j := (j + S[i] + key[i mod keylength]) mod 256 - swap values of S[i] and S[j] - * endfor - * - * @param keySchedule int array of size keylength - * @param key user given password - */ -void rc4_key_exchange(int keySchedule[KEY_SCHEDULE_LENGTH], char* key); - -/** - * Precondition: keySchedule is an int array of size 256 already initialized by the RC4 key-scheduling algorithm - * Performs the RC4 pseudo-random generation algorithm with keylength 256. Returns a string of length len with output - * frm this algorithm. Pseudocode example: - * i := 0 - * j := 0 - * while GeneratingOutput: - * i := (i + 1) mod 256 - * j := (j + S[i]) mod 256 - * swap values of S[i] and S[j] - * K := S[(S[i] + S[j]) mod 256] - * output K - * endwhile - * - * @param keySchedule int array of size keylength (already initialized) - * @param len size of portfolio in bytes - * @return string of size len that can be XOR'ed with message to be en/decoded - */ -char* rc4_prga(int keySchedule[KEY_SCHEDULE_LENGTH], size_t len); - -/** - * Precondition: output is a string containing the output of the RC4 pseudo-random generation algorithm. pString - * is a String object containing the portfolio. - * XOR's the each index of output by each index of the char* in pString and stores that in the index of output - * @param output string - * @param message portoflio String - */ -void rc4_execute(char* output, String* pString); - -/** * Returns an encoded string given a String object and password used to encode it. * @param pString The String to encode. * @param password the key used to encode - * @return encoded string - */ -char* rc4_encode_string(String* pString, char* password); - -/** - * Given input input_pString, returns an encrypted or decrypted version of it. If trying to encrypt a non-JSON - * formatted input_pString, abort. Similarly, if trying to decrypt a JSON-formatted input_pString, abort. password may - * be a string or NULL. If NULL, get a password from the user if encrypting, ask for the password again to confirm - * inputs are the same. If decrypting and the decrypted String is not JSON formatted, abort (wrong password). - * @param input_pString the String to encrypt/decrypt - * @param password the key or NULL - * @param option ENCRYPT or DECRYPT - * @return encrypted or decrypted String */ -String* rc4_get_crypted_string(String* input_pString, char* password, int option); +void rc4_encode_string(String* pString, char* password); #endif
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