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*/
27int 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