1/*
2 * Copyright (c) 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
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 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/* $Id$ */
35
36#ifndef HEIM_HMAC_H
37#define HEIM_HMAC_H 1
38
39#include <hcrypto/evp.h>
40
41/* symbol renaming */
42#define HMAC_CTX_init hc_HMAC_CTX_init
43#define HMAC_CTX_cleanup hc_HMAC_CTX_cleanup
44#define HMAC_size hc_HMAC_size
45#define HMAC_Init_ex hc_HMAC_Init_ex
46#define HMAC_Update hc_HMAC_Update
47#define HMAC_Final hc_HMAC_Final
48#define HMAC hc_HMAC
49
50/*
51 *
52 */
53
54#define HMAC_MAX_MD_CBLOCK	64
55
56typedef struct hc_HMAC_CTX HMAC_CTX;
57
58struct hc_HMAC_CTX {
59    const EVP_MD *md;
60    ENGINE *engine;
61    EVP_MD_CTX *ctx;
62    size_t key_length;
63    void *opad;
64    void *ipad;
65    void *buf;
66};
67
68
69void	HMAC_CTX_init(HMAC_CTX *);
70void	HMAC_CTX_cleanup(HMAC_CTX *ctx);
71
72size_t	HMAC_size(const HMAC_CTX *ctx);
73
74void	HMAC_Init_ex(HMAC_CTX *, const void *, size_t,
75		     const EVP_MD *, ENGINE *);
76void	HMAC_Update(HMAC_CTX *ctx, const void *data, size_t len);
77void	HMAC_Final(HMAC_CTX *ctx, void *md, unsigned int *len);
78
79void *	HMAC(const EVP_MD *evp_md, const void *key, size_t key_len,
80	     const void *data, size_t n, void *md, unsigned int *md_len);
81
82#endif /* HEIM_HMAC_H */
83