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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2023 Stormshield
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _OSSL_AES_GCM_H_
#define _OSSL_AES_GCM_H_
#include <crypto/openssl/ossl_cipher.h>
#include <crypto/rijndael/rijndael.h>
struct ossl_gcm_context;
struct ossl_aes_gcm_ops {
void (*init)(struct ossl_gcm_context *ctx, const void *key,
size_t keylen);
void (*setiv)(struct ossl_gcm_context *ctx, const unsigned char *iv,
size_t ivlen);
int (*aad)(struct ossl_gcm_context *ctx, const unsigned char *aad,
size_t len);
int (*encrypt)(struct ossl_gcm_context *ctx, const unsigned char *in,
unsigned char *out, size_t len);
int (*decrypt)(struct ossl_gcm_context *ctx, const unsigned char *in,
unsigned char *out, size_t len);
int (*finish)(struct ossl_gcm_context *ctx, const unsigned char *tag,
size_t len);
void (*tag)(struct ossl_gcm_context *ctx, unsigned char *tag,
size_t len);
};
#ifndef __SIZEOF_INT128__
typedef struct { uint64_t v[2]; } __uint128_t;
#endif
struct ossl_gcm_context {
struct {
union {
uint64_t u[2];
uint32_t d[4];
uint8_t c[16];
} Yi, EKi, EK0, len, Xi, H;
__uint128_t Htable[16];
unsigned int mres, ares;
} gcm;
struct {
uint32_t ks[4 * (RIJNDAEL_MAXNR + 1)];
int rounds;
} aes_ks;
const struct ossl_aes_gcm_ops *ops;
};
#endif /* !_OSSL_AES_GCM_H_ */
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