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 (at) 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 */ 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
