1 /* 2 * aes_gcm.h 3 * 4 * Header for AES Galois Counter Mode. 5 * 6 * John A. Foley 7 * Cisco Systems, Inc. 8 * 9 */ 10 /* 11 * 12 * Copyright (c) 2013-2017, Cisco Systems, Inc. 13 * All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 19 * Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 22 * Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials provided 25 * with the distribution. 26 * 27 * Neither the name of the Cisco Systems, Inc. nor the names of its 28 * contributors may be used to endorse or promote products derived 29 * from this software without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 42 * OF THE POSSIBILITY OF SUCH DAMAGE. 43 * 44 */ 45 46 #ifndef AES_GCM_H 47 #define AES_GCM_H 48 49 #include "cipher.h" 50 #include "srtp.h" 51 #include "datatypes.h" 52 53 #ifdef OPENSSL 54 55 #include <openssl/evp.h> 56 #include <openssl/aes.h> 57 58 typedef struct { 59 int key_size; 60 int tag_len; 61 EVP_CIPHER_CTX *ctx; 62 srtp_cipher_direction_t dir; 63 } srtp_aes_gcm_ctx_t; 64 65 #endif /* OPENSSL */ 66 67 #ifdef NSS 68 69 #include <nss.h> 70 #include <pk11pub.h> 71 72 #define MAX_AD_SIZE 2048 73 74 typedef struct { 75 int key_size; 76 int tag_size; 77 srtp_cipher_direction_t dir; 78 NSSInitContext *nss; 79 PK11SymKey *key; 80 uint8_t iv[12]; 81 uint8_t aad[MAX_AD_SIZE]; 82 int aad_size; 83 CK_GCM_PARAMS params; 84 uint8_t tag[16]; 85 } srtp_aes_gcm_ctx_t; 86 87 #endif /* NSS */ 88 89 #endif /* AES_GCM_H */ 90