| // 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 ofb_setiv.c |
| OFB implementation, set IV, Tom St Denis |
| */ |
| |
| #ifdef LTC_OFB_MODE |
| |
| /** |
| Set an initialization vector |
| @param IV The initialization vector |
| @param len The length of the vector (in octets) |
| @param ofb The OFB state |
| @return CRYPT_OK if successful |
| */ |
| int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb) |
| { |
| int err; |
| |
| LTC_ARGCHK(IV != NULL); |
| LTC_ARGCHK(ofb != NULL); |
| |
| if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) { |
| return err; |
| } |
| |
| if (len != (unsigned long)ofb->blocklen) { |
| return CRYPT_INVALID_ARG; |
| } |
| |
| /* force next block */ |
| ofb->padlen = 0; |
| return cipher_descriptor[ofb->cipher]->ecb_encrypt(IV, ofb->IV, &ofb->key); |
| } |
| |
| #endif |
| |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |