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 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*/
28int 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