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sha1.h
1 /**
2  * /@code
3  *
4  * \file sha1.h
5  *
6  * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
7  *
8  * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
9  *
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  *
16  * * Redistributions of source code must retain the above copyright
17  * notice, this list of conditions and the following disclaimer.
18  * * Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions and the following disclaimer in the
20  * documentation and/or other materials provided with the distribution.
21  * * Neither the names of PolarSSL or XySSL nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
28  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
31  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  *
37  * /@endcode
38  */
39 
40 #include "ppp_opts.h"
41 #if PPP_INCLUDED_POLARSSL_SHA1
42 
43 #ifndef PPP_INCLUDED_POLARSSL_SHA1_H
44 #define PPP_INCLUDED_POLARSSL_SHA1_H
45 
46 /**
47  * \brief SHA-1 context structure
48  */
49 typedef struct
50 {
51  unsigned long total[2]; /*!< number of bytes processed */
52  unsigned long state[5]; /*!< intermediate digest state */
53  unsigned char buffer[64]; /*!< data block being processed */
54 }
55 sha1_context;
56 
57 #ifdef __cplusplus
58 extern "C" {
59 #endif
60 
61 /**
62  * \brief SHA-1 context setup
63  *
64  * \param ctx context to be initialized
65  */
66 void sha1_starts( sha1_context *ctx );
67 
68 /**
69  * \brief SHA-1 process buffer
70  *
71  * \param ctx SHA-1 context
72  * \param input buffer holding the data
73  * \param ilen length of the input data
74  */
75 void sha1_update( sha1_context *ctx, const unsigned char *input, int ilen );
76 
77 /**
78  * \brief SHA-1 final digest
79  *
80  * \param ctx SHA-1 context
81  * \param output SHA-1 checksum result
82  */
83 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
84 
85 /**
86  * \brief Output = SHA-1( input buffer )
87  *
88  * \param input buffer holding the data
89  * \param ilen length of the input data
90  * \param output SHA-1 checksum result
91  */
92 void sha1( unsigned char *input, int ilen, unsigned char output[20] );
93 
94 #ifdef __cplusplus
95 }
96 #endif
97 
98 #endif /* PPP_INCLUDED_POLARSSL_SHA1_H */
99 
100 #endif /* PPP_INCLUDED_POLARSSL_SHA1 */
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