| // SPDX-License-Identifier: BSD-2-Clause |
| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| */ |
| #include "tomcrypt_private.h" |
| |
| /** |
| @file cbc_getiv.c |
| CBC implementation, get IV, Tom St Denis |
| */ |
| |
| #ifdef LTC_CBC_MODE |
| |
| /** |
| Get the current initialization vector |
| @param IV [out] The destination of the initialization vector |
| @param len [in/out] The max size and resulting size of the initialization vector |
| @param cbc The CBC state |
| @return CRYPT_OK if successful |
| */ |
| int cbc_getiv(unsigned char *IV, unsigned long *len, const symmetric_CBC *cbc) |
| { |
| LTC_ARGCHK(IV != NULL); |
| LTC_ARGCHK(len != NULL); |
| LTC_ARGCHK(cbc != NULL); |
| if ((unsigned long)cbc->blocklen > *len) { |
| *len = cbc->blocklen; |
| return CRYPT_BUFFER_OVERFLOW; |
| } |
| XMEMCPY(IV, cbc->IV, cbc->blocklen); |
| *len = cbc->blocklen; |
| |
| return CRYPT_OK; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |