1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis 2 * 3 * LibTomCrypt is a library that provides various cryptographic 4 * algorithms in a highly modular and flexible manner. 5 * 6 * The library is free for all purposes without any express 7 * guarantee it works. 8 * 9 * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com 10 */ 11 #include "tomcrypt.h" 12 13 /** 14 @file ctr_decrypt.c 15 CTR implementation, decrypt data, Tom St Denis 16 */ 17 18 #ifdef LTC_CTR_MODE 19 20 /** 21 CTR decrypt 22 @param ct Ciphertext 23 @param pt [out] Plaintext 24 @param len Length of ciphertext (octets) 25 @param ctr CTR state 26 @return CRYPT_OK if successful 27 */ ctr_decrypt(const unsigned char * ct,unsigned char * pt,unsigned long len,symmetric_CTR * ctr)28 int ctr_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CTR *ctr) 29 { 30 LTC_ARGCHK(pt != NULL); 31 LTC_ARGCHK(ct != NULL); 32 LTC_ARGCHK(ctr != NULL); 33 34 return ctr_encrypt(ct, pt, len, ctr); 35 } 36 37 #endif 38 39 40 /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_decrypt.c,v $ */ 41 /* $Revision: 1.5 $ */ 42 /* $Date: 2006/06/29 01:46:46 $ */ 43