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comparison libtomcrypt/src/modes/cfb/cfb_setiv.c @ 330:5488db2e9e4e

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merge of 332f709a4cb39cde4cedab7c3be89e05f3023067 and ca4ca78b82c5d430c69ce01bf794e8886ce81431
author Matt Johnston <matt@ucc.asn.au>
date Sat, 10 Jun 2006 16:39:40 +0000
parents 1b9e69c058d2
children 0cbe8f6dbf9e
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329:8ed0dce45126 330:5488db2e9e4e
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, [email protected], http://libtomcrypt.org
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file cfb_setiv.c
15 CFB implementation, set IV, Tom St Denis
16 */
17 #ifdef CFB
18
19 /**
20 Set an initial vector
21 @param IV The initial vector
22 @param len The length of the vector (in octets)
23 @param cfb The CFB state
24 @return CRYPT_OK if successful
25 */
26 int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb)
27 {
28 int err;
29
30 LTC_ARGCHK(IV != NULL);
31 LTC_ARGCHK(cfb != NULL);
32
33 if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
34 return err;
35 }
36
37 if (len != (unsigned long)cfb->blocklen) {
38 return CRYPT_INVALID_ARG;
39 }
40
41 /* force next block */
42 cfb->padlen = 0;
43 cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key);
44
45 return CRYPT_OK;
46 }
47
48 #endif
49
50
51 /* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_setiv.c,v $ */
52 /* $Revision: 1.3 $ */
53 /* $Date: 2005/05/05 14:35:59 $ */