| // 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. |
| */ |
| |
| /** |
| @file gcm_reset.c |
| GCM implementation, reset a used state so it can accept IV data, by Tom St Denis |
| */ |
| #include "tomcrypt_private.h" |
| |
| #ifdef LTC_GCM_MODE |
| |
| /** |
| Reset a GCM state to as if you just called gcm_init(). This saves the initialization time. |
| @param gcm The GCM state to reset |
| @return CRYPT_OK on success |
| */ |
| int gcm_reset(gcm_state *gcm) |
| { |
| LTC_ARGCHK(gcm != NULL); |
| |
| zeromem(gcm->buf, sizeof(gcm->buf)); |
| zeromem(gcm->X, sizeof(gcm->X)); |
| gcm->mode = LTC_GCM_MODE_IV; |
| gcm->ivmode = 0; |
| gcm->buflen = 0; |
| gcm->totlen = 0; |
| gcm->pttotlen = 0; |
| |
| return CRYPT_OK; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |