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1/*-
2 * Copyright 2005,2007,2009 Colin Percival
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/lib/libmd/sha256.h,v 1.2 2006/01/17 15:35:56 phk Exp $
27 */
28
29#ifndef _SHA256_H_
30#define _SHA256_H_
31
32typedef struct SHA256Context {
33 uint32_t state[8];
34 uint32_t count[2];
35 unsigned char buf[64];
36} SHA256_CTX;
37
38typedef struct HMAC_SHA256Context {
39 SHA256_CTX ictx;
40 SHA256_CTX octx;
41} HMAC_SHA256_CTX;
42
43void SHA256_Init(SHA256_CTX *);
44void SHA256_Update(SHA256_CTX *, const void *, size_t);
45void SHA256_Final(unsigned char[32], SHA256_CTX *);
46void HMAC__SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t);
47void HMAC__SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t);
48void HMAC__SHA256_Final(unsigned char[32], HMAC_SHA256_CTX *);
49
50/**
51 * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
52 * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and
53 * write the output to buf. The value dkLen must be at most 32 * (2^32 - 1).
54 */
55void PBKDF2_SHA256(const uint8_t *, size_t, const uint8_t *, size_t, uint64_t,
56 uint8_t *, size_t);
57
58#endif /* !_SHA256_H_ */