Mercurial > dropbear

comparison src/modes/cfb/cfb_setiv.c @ 192:9cc34777b479 libtomcrypt

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
propagate from branch 'au.asn.ucc.matt.ltc-orig' (head 9ba8f01f44320e9cb9f19881105ae84f84a43ea9) to branch 'au.asn.ucc.matt.dropbear.ltc' (head dbf51c569bc34956ad948e4cc87a0eeb2170b768)
author Matt Johnston <matt@ucc.asn.au>
date Sun, 08 May 2005 06:36:47 +0000
parents 1c15b283127b
children 39d5d58461d6
comparison
equal deleted inserted replaced
164:cd1143579f00 192:9cc34777b479
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