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1 office 1 /*
2 * FIPS-180-2 compliant SHA-2 implementation (only sha256 so far)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  
18 */
19  
20 #ifndef _SHA2_H
21 #define _SHA2_H
22  
23 #include "ws_symbol_export.h"
24  
25 #define SHA256_DIGEST_LEN 32
26 #define SHA256_BLOCK_SIZE 64
27  
28 typedef struct
29 {
30 guint64 total;
31 guint32 state[8];
32 guint8 buffer[SHA256_BLOCK_SIZE];
33 }
34 sha256_context;
35  
36 WS_DLL_PUBLIC
37 void sha256_starts( sha256_context *ctx );
38 WS_DLL_PUBLIC
39 void sha256_update( sha256_context *ctx, const guint8 *input, guint32 length );
40 WS_DLL_PUBLIC
41 void sha256_finish( sha256_context *ctx, guint8 digest[SHA256_DIGEST_LEN] );
42  
43  
44 typedef struct {
45 sha256_context ctx;
46 guint8 k_opad[SHA256_BLOCK_SIZE];
47 }
48 sha256_hmac_context;
49  
50 WS_DLL_PUBLIC
51 void sha256_hmac_starts( sha256_hmac_context *hctx, const guint8 *key, guint32 keylen );
52 WS_DLL_PUBLIC
53 void sha256_hmac_update( sha256_hmac_context *hctx, const guint8 *buf, guint32 buflen );
54 WS_DLL_PUBLIC
55 void sha256_hmac_finish( sha256_hmac_context *hctx, guint8 digest[SHA256_DIGEST_LEN] );
56 WS_DLL_PUBLIC
57 void sha256_hmac( const guint8 *key, guint32 keylen, const guint8 *buf, guint32 buflen,
58 guint8 digest[SHA256_DIGEST_LEN] );
59  
60  
61  
62 #endif /* _SHA2_H */
63  
64 /*
65 * Editor modelines - http://www.wireshark.org/tools/modelines.html
66 *
67 * Local variables:
68 * c-basic-offset: 4
69 * tab-width: 8
70 * indent-tabs-mode: nil
71 * End:
72 *
73 * vi: set shiftwidth=4 tabstop=8 expandtab:
74 * :indentSize=4:tabSize=8:noTabs=true:
75 */