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 (at) gmail.com, http://libtomcrypt.com 10 */ 11 #include "tomcrypt.h" 12 13 /** 14 @file ecb_encrypt.c 15 ECB implementation, encrypt a block, Tom St Denis 16 */ 17 18 #ifdef LTC_ECB_MODE 19 20 /** 21 ECB encrypt 22 @param pt Plaintext 23 @param ct [out] Ciphertext 24 @param len The number of octets to process (must be multiple of the cipher block size) 25 @param ecb ECB state 26 @return CRYPT_OK if successful 27 */ 28 int ecb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_ECB *ecb) 29 { 30 int err; 31 LTC_ARGCHK(pt != NULL); 32 LTC_ARGCHK(ct != NULL); 33 LTC_ARGCHK(ecb != NULL); 34 if ((err = cipher_is_valid(ecb->cipher)) != CRYPT_OK) { 35 return err; 36 } 37 if (len % cipher_descriptor[ecb->cipher].block_length) { 38 return CRYPT_INVALID_ARG; 39 } 40 41 /* check for accel */ 42 if (cipher_descriptor[ecb->cipher].accel_ecb_encrypt != NULL) { 43 return cipher_descriptor[ecb->cipher].accel_ecb_encrypt(pt, ct, len / cipher_descriptor[ecb->cipher].block_length, &ecb->key); 44 } else { 45 while (len) { 46 if ((err = cipher_descriptor[ecb->cipher].ecb_encrypt(pt, ct, &ecb->key)) != CRYPT_OK) { 47 return err; 48 } 49 pt += cipher_descriptor[ecb->cipher].block_length; 50 ct += cipher_descriptor[ecb->cipher].block_length; 51 len -= cipher_descriptor[ecb->cipher].block_length; 52 } 53 } 54 return CRYPT_OK; 55 } 56 57 #endif 58 59 /* $Source: /cvs/libtom/libtomcrypt/src/modes/ecb/ecb_encrypt.c,v $ */ 60 /* $Revision: 1.9 $ */ 61 /* $Date: 2006/06/29 01:51:34 $ */ 62
