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 #include <crypto/rijndael/rijndael.h> 32 33 struct ossl_gcm_context; 34 35 struct ossl_aes_gcm_ops { 36 void (*init)(struct ossl_gcm_context *ctx, const void *key, 37 size_t keylen); 38 void (*setiv)(struct ossl_gcm_context *ctx, const unsigned char *iv, 39 size_t ivlen); 40 int (*aad)(struct ossl_gcm_context *ctx, const unsigned char *aad, 41 size_t len); 42 int (*encrypt)(struct ossl_gcm_context *ctx, const unsigned char *in, 43 unsigned char *out, size_t len); 44 int (*decrypt)(struct ossl_gcm_context *ctx, const unsigned char *in, 45 unsigned char *out, size_t len); 46 int (*finish)(struct ossl_gcm_context *ctx, const unsigned char *tag, 47 size_t len); 48 void (*tag)(struct ossl_gcm_context *ctx, unsigned char *tag, 49 size_t len); 50 }; 51 52 #ifndef __SIZEOF_INT128__ 53 typedef struct { uint64_t v[2]; } __uint128_t; 54 #endif 55 56 struct ossl_gcm_context { 57 struct { 58 union { 59 uint64_t u[2]; 60 uint32_t d[4]; 61 uint8_t c[16]; 62 } Yi, EKi, EK0, len, Xi, H; 63 __uint128_t Htable[16]; 64 unsigned int mres, ares; 65 } gcm; 66 67 struct { 68 uint32_t ks[4 * (RIJNDAEL_MAXNR + 1)]; 69 int rounds; 70 } aes_ks; 71 72 const struct ossl_aes_gcm_ops *ops; 73 }; 74 75 #endif /* !_OSSL_AES_GCM_H_ */ 76