sha.h revision a6de77de1727d5c40fdfdf841f3e8d13e0fc0140 
1/* sha.h
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Redistribution and use in source and binary forms, with or without
6** modification, are permitted provided that the following conditions are met:
7**     * Redistributions of source code must retain the above copyright
8**       notice, this list of conditions and the following disclaimer.
9**     * Redistributions in binary form must reproduce the above copyright
10**       notice, this list of conditions and the following disclaimer in the
11**       documentation and/or other materials provided with the distribution.
12**     * Neither the name of Google Inc. nor the names of its contributors may
13**       be used to endorse or promote products derived from this software
14**       without specific prior written permission.
15**
16** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
17** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*/
27
28#ifndef _EMBEDDED_SHA_H_
29#define _EMBEDDED_SHA_H_
30
31#include <inttypes.h>
32#include <endian.h>
33
34#ifdef __cplusplus
35extern "C" {
36#endif
37
38typedef struct SHA_CTX {
39    uint64_t count;
40    uint32_t state[5];
41#if __BYTE_ORDER == __LITTLE_ENDIAN
42    union {
43        uint8_t b[64];
44        uint32_t w[16];
45    } buf;
46#else
47    uint8_t buf[64];
48#endif
49} SHA_CTX;
50
51void SHA_init(SHA_CTX* ctx);
52void SHA_update(SHA_CTX* ctx, const void* data, int len);
53const uint8_t* SHA_final(SHA_CTX* ctx);
54
55/* Convenience method. Returns digest parameter value. */
56const uint8_t* SHA(const void* data, int len, uint8_t* digest);
57
58#define SHA_DIGEST_SIZE 20
59
60#ifdef __cplusplus
61}
62#endif
63
64#endif
65