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comparison libtomcrypt/src/modes/ctr/ctr_getiv.c @ 285:1b9e69c058d2

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propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
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281:997e6f7dc01e 285:1b9e69c058d2
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 ctr_getiv.c
15 CTR implementation, get IV, Tom St Denis
16 */
17
18 #ifdef CTR
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 ctr The CTR state
25 @return CRYPT_OK if successful
26 */
27 int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr)
28 {
29 LTC_ARGCHK(IV != NULL);
30 LTC_ARGCHK(len != NULL);
31 LTC_ARGCHK(ctr != NULL);
32 if ((unsigned long)ctr->blocklen > *len) {
33 return CRYPT_BUFFER_OVERFLOW;
34 }
35 XMEMCPY(IV, ctr->ctr, ctr->blocklen);
36 *len = ctr->blocklen;
37
38 return CRYPT_OK;
39 }
40
41 #endif
42
43 /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_getiv.c,v $ */
44 /* $Revision: 1.3 $ */
45 /* $Date: 2005/05/05 14:35:59 $ */