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/*
* aes_gcm.h
*
* Header for AES Galois Counter Mode.
*
* John A. Foley
* Cisco Systems, Inc.
*
*/
/*
*
* Copyright (c) 2013-2017, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT HOLDERS OR CONTRIBUTORS 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 AES_GCM_H
#define AES_GCM_H
#include "cipher.h"
#include "srtp.h"
#include "datatypes.h"
#ifdef OPENSSL
#include <openssl/evp.h>
#include <openssl/aes.h>
typedef struct {
int key_size;
int tag_len;
EVP_CIPHER_CTX *ctx;
srtp_cipher_direction_t dir;
} srtp_aes_gcm_ctx_t;
#endif /* OPENSSL */
#ifdef MBEDTLS
#define MAX_AD_SIZE 2048
#include <mbedtls/aes.h>
#include <mbedtls/gcm.h>
typedef struct {
int key_size;
int tag_len;
int aad_size;
int iv_len;
uint8_t iv[12];
uint8_t tag[16];
uint8_t aad[MAX_AD_SIZE];
mbedtls_gcm_context *ctx;
srtp_cipher_direction_t dir;
} srtp_aes_gcm_ctx_t;
#endif /* MBEDTLS */
#ifdef NSS
#define NSS_PKCS11_2_0_COMPAT 1
#include <nss.h>
#include <pk11pub.h>
#define MAX_AD_SIZE 2048
typedef struct {
int key_size;
int tag_size;
srtp_cipher_direction_t dir;
NSSInitContext *nss;
PK11SymKey *key;
uint8_t iv[12];
uint8_t aad[MAX_AD_SIZE];
int aad_size;
CK_GCM_PARAMS params;
uint8_t tag[16];
} srtp_aes_gcm_ctx_t;
#endif /* NSS */
#endif /* AES_GCM_H */
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