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80a47a2c TK |
1 | /** |
2 | * \file sha2.h | |
3 | * | |
62d3e98d TK |
4 | * Copyright (C) 2006-2010, Brainspark B.V. |
5 | * | |
6 | * This file is part of PolarSSL (http://www.polarssl.org) | |
7 | * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> | |
80a47a2c | 8 | * |
62d3e98d | 9 | * All rights reserved. |
80a47a2c TK |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with this program; if not, write to the Free Software Foundation, Inc., | |
23 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
24 | */ | |
25 | ||
67932e54 | 26 | /* $Cambridge: exim/src/src/pdkim/sha2.h,v 1.3 2009/12/07 13:05:07 tom Exp $ */ |
80a47a2c TK |
27 | |
28 | #ifndef POLARSSL_SHA2_H | |
29 | #define POLARSSL_SHA2_H | |
30 | ||
31 | /** | |
32 | * \brief SHA-256 context structure | |
33 | */ | |
34 | #ifndef HAVE_SHA2_CONTEXT | |
35 | #define HAVE_SHA2_CONTEXT | |
36 | typedef struct sha2_context sha2_context; | |
37 | #endif | |
38 | ||
39 | struct sha2_context | |
40 | { | |
41 | unsigned long total[2]; /*!< number of bytes processed */ | |
42 | unsigned long state[8]; /*!< intermediate digest state */ | |
43 | unsigned char buffer[64]; /*!< data block being processed */ | |
44 | ||
45 | unsigned char ipad[64]; /*!< HMAC: inner padding */ | |
46 | unsigned char opad[64]; /*!< HMAC: outer padding */ | |
47 | int is224; /*!< 0 => SHA-256, else SHA-224 */ | |
48 | }; | |
49 | ||
50 | #ifdef __cplusplus | |
51 | extern "C" { | |
52 | #endif | |
53 | ||
54 | /** | |
55 | * \brief SHA-256 context setup | |
56 | * | |
57 | * \param ctx context to be initialized | |
58 | * \param is224 0 = use SHA256, 1 = use SHA224 | |
59 | */ | |
60 | void sha2_starts( sha2_context *ctx, int is224 ); | |
61 | ||
62 | /** | |
63 | * \brief SHA-256 process buffer | |
64 | * | |
65 | * \param ctx SHA-256 context | |
66 | * \param input buffer holding the data | |
67 | * \param ilen length of the input data | |
68 | */ | |
62d3e98d | 69 | void sha2_update( sha2_context *ctx, const unsigned char *input, int ilen ); |
80a47a2c TK |
70 | |
71 | /** | |
72 | * \brief SHA-256 final digest | |
73 | * | |
74 | * \param ctx SHA-256 context | |
75 | * \param output SHA-224/256 checksum result | |
76 | */ | |
77 | void sha2_finish( sha2_context *ctx, unsigned char output[32] ); | |
78 | ||
79 | /** | |
80 | * \brief Output = SHA-256( input buffer ) | |
81 | * | |
82 | * \param input buffer holding the data | |
83 | * \param ilen length of the input data | |
84 | * \param output SHA-224/256 checksum result | |
85 | * \param is224 0 = use SHA256, 1 = use SHA224 | |
86 | */ | |
62d3e98d | 87 | void sha2( const unsigned char *input, int ilen, |
80a47a2c TK |
88 | unsigned char output[32], int is224 ); |
89 | ||
90 | /** | |
91 | * \brief Output = SHA-256( file contents ) | |
92 | * | |
93 | * \param path input file name | |
94 | * \param output SHA-224/256 checksum result | |
95 | * \param is224 0 = use SHA256, 1 = use SHA224 | |
96 | * | |
97 | * \return 0 if successful, 1 if fopen failed, | |
98 | * or 2 if fread failed | |
99 | */ | |
62d3e98d | 100 | int sha2_file( const char *path, unsigned char output[32], int is224 ); |
80a47a2c TK |
101 | |
102 | /** | |
103 | * \brief SHA-256 HMAC context setup | |
104 | * | |
105 | * \param ctx HMAC context to be initialized | |
106 | * \param key HMAC secret key | |
107 | * \param keylen length of the HMAC key | |
108 | * \param is224 0 = use SHA256, 1 = use SHA224 | |
109 | */ | |
62d3e98d | 110 | void sha2_hmac_starts( sha2_context *ctx, const unsigned char *key, int keylen, |
80a47a2c TK |
111 | int is224 ); |
112 | ||
113 | /** | |
114 | * \brief SHA-256 HMAC process buffer | |
115 | * | |
116 | * \param ctx HMAC context | |
117 | * \param input buffer holding the data | |
118 | * \param ilen length of the input data | |
119 | */ | |
62d3e98d | 120 | void sha2_hmac_update( sha2_context *ctx, const unsigned char *input, int ilen ); |
80a47a2c TK |
121 | |
122 | /** | |
123 | * \brief SHA-256 HMAC final digest | |
124 | * | |
125 | * \param ctx HMAC context | |
126 | * \param output SHA-224/256 HMAC checksum result | |
127 | */ | |
128 | void sha2_hmac_finish( sha2_context *ctx, unsigned char output[32] ); | |
129 | ||
62d3e98d TK |
130 | /** |
131 | * \brief SHA-256 HMAC context reset | |
132 | * | |
133 | * \param ctx HMAC context to be reset | |
134 | */ | |
135 | void sha2_hmac_reset( sha2_context *ctx ); | |
136 | ||
80a47a2c TK |
137 | /** |
138 | * \brief Output = HMAC-SHA-256( hmac key, input buffer ) | |
139 | * | |
140 | * \param key HMAC secret key | |
141 | * \param keylen length of the HMAC key | |
142 | * \param input buffer holding the data | |
143 | * \param ilen length of the input data | |
144 | * \param output HMAC-SHA-224/256 result | |
145 | * \param is224 0 = use SHA256, 1 = use SHA224 | |
146 | */ | |
62d3e98d TK |
147 | void sha2_hmac( const unsigned char *key, int keylen, |
148 | const unsigned char *input, int ilen, | |
80a47a2c TK |
149 | unsigned char output[32], int is224 ); |
150 | ||
151 | #ifdef __cplusplus | |
152 | } | |
153 | #endif | |
154 | ||
155 | #endif /* sha2.h */ |