1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2023 Stormshield 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _OSSL_AES_GCM_H_ 28 #define _OSSL_AES_GCM_H_ 29 30 #include <crypto/openssl/ossl_cipher.h> 31 32 struct ossl_gcm_context; 33 34 struct ossl_aes_gcm_ops { 35 void (*init)(struct ossl_gcm_context *ctx, const void *key, 36 size_t keylen); 37 void (*setiv)(struct ossl_gcm_context *ctx, const unsigned char *iv, 38 size_t ivlen); 39 int (*aad)(struct ossl_gcm_context *ctx, const unsigned char *aad, 40 size_t len); 41 int (*encrypt)(struct ossl_gcm_context *ctx, const unsigned char *in, 42 unsigned char *out, size_t len); 43 int (*decrypt)(struct ossl_gcm_context *ctx, const unsigned char *in, 44 unsigned char *out, size_t len); 45 int (*finish)(struct ossl_gcm_context *ctx, const unsigned char *tag, 46 size_t len); 47 void (*tag)(struct ossl_gcm_context *ctx, unsigned char *tag, 48 size_t len); 49 }; 50 51 #ifndef __SIZEOF_INT128__ 52 typedef struct { uint64_t v[2]; } __uint128_t; 53 #endif 54 55 struct ossl_gcm_context { 56 struct { 57 union { 58 uint64_t u[2]; 59 uint32_t d[4]; 60 uint8_t c[16]; 61 } Yi, EKi, EK0, len, Xi, H; 62 __uint128_t Htable[16]; 63 unsigned int mres, ares; 64 } gcm; 65 66 struct ossl_aes_keysched aes_ks; 67 68 const struct ossl_aes_gcm_ops *ops; 69 }; 70 71 #endif /* !_OSSL_AES_GCM_H_ */ 72