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 lrw_getiv.c
15 LRW_MODE implementation, Retrieve the current IV, Tom St Denis
16 */
17
18 #ifdef LTC_LRW_MODE
19
20 /**
21 Get the IV for LRW
22 @param IV [out] The IV, must be 16 octets
23 @param len Length ... must be at least 16 :-)
24 @param lrw The LRW state to read
25 @return CRYPT_OK if successful
26 */
lrw_getiv(unsigned char * IV,unsigned long * len,symmetric_LRW * lrw)27 int lrw_getiv(unsigned char *IV, unsigned long *len, symmetric_LRW *lrw)
28 {
29 LTC_ARGCHK(IV != NULL);
30 LTC_ARGCHK(len != NULL);
31 LTC_ARGCHK(lrw != NULL);
32 if (*len < 16) {
33 *len = 16;
34 return CRYPT_BUFFER_OVERFLOW;
35 }
36
37 XMEMCPY(IV, lrw->IV, 16);
38 *len = 16;
39 return CRYPT_OK;
40 }
41
42 #endif
43 /* $Source: /cvs/libtom/libtomcrypt/src/modes/lrw/lrw_getiv.c,v $ */
44 /* $Revision: 1.9 $ */
45 /* $Date: 2006/06/29 01:53:13 $ */
46