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comparison libtomcrypt/src/modes/cfb/cfb_getiv.c @ 389:5ff8218bcee9

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propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 2af95f00ebd5bb7a28b3817db1218442c935388e) to branch 'au.asn.ucc.matt.dropbear' (head ecd779509ef23a8cdf64888904fc9b31d78aa933)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 03:14:55 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
comparison
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388:fb54020f78e1 389:5ff8218bcee9
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.com
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file cfb_getiv.c
15 CFB implementation, get IV, Tom St Denis
16 */
17
18 #ifdef LTC_CFB_MODE
19
20 /**
21 Get the current initial vector
22 @param IV [out] The destination of the initial vector
23 @param len [in/out] The max size and resulting size of the initial vector
24 @param cfb The CFB state
25 @return CRYPT_OK if successful
26 */
27 int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb)
28 {
29 LTC_ARGCHK(IV != NULL);
30 LTC_ARGCHK(len != NULL);
31 LTC_ARGCHK(cfb != NULL);
32 if ((unsigned long)cfb->blocklen > *len) {
33 *len = cfb->blocklen;
34 return CRYPT_BUFFER_OVERFLOW;
35 }
36 XMEMCPY(IV, cfb->IV, cfb->blocklen);
37 *len = cfb->blocklen;
38
39 return CRYPT_OK;
40 }
41
42 #endif
43
44 /* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_getiv.c,v $ */
45 /* $Revision: 1.6 $ */
46 /* $Date: 2006/06/29 01:51:34 $ */