| // 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 lrw_decrypt.c |
| LRW_MODE implementation, Decrypt blocks, Tom St Denis |
| */ |
| |
| #ifdef LTC_LRW_MODE |
| |
| /** |
| LRW decrypt blocks |
| @param ct The ciphertext |
| @param pt [out] The plaintext |
| @param len The length in octets, must be a multiple of 16 |
| @param lrw The LRW state |
| */ |
| int lrw_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_LRW *lrw) |
| { |
| int err; |
| |
| LTC_ARGCHK(pt != NULL); |
| LTC_ARGCHK(ct != NULL); |
| LTC_ARGCHK(lrw != NULL); |
| |
| if ((err = cipher_is_valid(lrw->cipher)) != CRYPT_OK) { |
| return err; |
| } |
| |
| if (cipher_descriptor[lrw->cipher]->accel_lrw_decrypt != NULL) { |
| return cipher_descriptor[lrw->cipher]->accel_lrw_decrypt(ct, pt, len, lrw->IV, lrw->tweak, &lrw->key); |
| } |
| |
| return lrw_process(ct, pt, len, LRW_DECRYPT, lrw); |
| } |
| |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |