1/*
2 * Copyright (c) 2011-12 Apple Inc. All Rights Reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24/*
25 * Copyright (c) 2005 Kungliga Tekniska Högskolan
26 * (Royal Institute of Technology, Stockholm, Sweden).
27 * All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 *
33 * 1. Redistributions of source code must retain the above copyright
34 *    notice, this list of conditions and the following disclaimer.
35 *
36 * 2. Redistributions in binary form must reproduce the above copyright
37 *    notice, this list of conditions and the following disclaimer in the
38 *    documentation and/or other materials provided with the distribution.
39 *
40 * 3. Neither the name of the Institute nor the names of its contributors
41 *    may be used to endorse or promote products derived from this software
42 *    without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 * SUCH DAMAGE.
55 */
56
57#ifndef _OSSL_HMAC_H_
58#define _OSSL_HMAC_H_    1
59
60#include "ossl-evp.h"
61
62/* symbol renaming */
63#define HMAC_CTX_init		ossl_HMAC_CTX_init
64#define HMAC_CTX_cleanup	ossl_HMAC_CTX_cleanup
65#define HMAC_cleanup		ossl_HMAC_CTX_cleanup
66#define HMAC_size		ossl_HMAC_size
67#define HMAC_Init		ossl_HMAC_Init
68#define HMAC_Init_ex		ossl_HMAC_Init_ex
69#define HMAC_Update		ossl_HMAC_Update
70#define HMAC_Final		ossl_HMAC_Final
71#define HMAC			ossl_HMAC
72
73/*
74 *
75 */
76
77#define HMAC_MAX_MD_CBLOCK    128	/* assumes SHA512 is the largest */
78
79typedef struct ossl_HMAC_CTX   HMAC_CTX;
80
81struct ossl_HMAC_CTX {
82	const EVP_MD *	md;
83	EVP_MD_CTX	md_ctx;
84	EVP_MD_CTX	i_ctx;
85	EVP_MD_CTX	o_ctx;
86	unsigned int	key_length;
87	unsigned char	key[HMAC_MAX_MD_CBLOCK];
88};
89
90
91void HMAC_CTX_init(HMAC_CTX *);
92void HMAC_CTX_cleanup(HMAC_CTX *ctx);
93
94size_t HMAC_size(const HMAC_CTX *ctx);
95
96void HMAC_Init(HMAC_CTX *, const void *, size_t, const EVP_MD *);
97void HMAC_Init_ex(HMAC_CTX *, const void *, size_t, const EVP_MD *, ENGINE *);
98void HMAC_Update(HMAC_CTX *ctx, const void *data, size_t len);
99void HMAC_Final(HMAC_CTX *ctx, void *md, unsigned int *len);
100
101void *HMAC(const EVP_MD *evp_md, const void *key, size_t key_len,
102	    const void *data, size_t n, void *md, unsigned int *md_len);
103
104#endif /* _OSSL_HMAC_H_ */
105