3 * based from http://xyssl.org/code/source/sha1/
4 * FIPS-180-1 compliant SHA-1 implementation
6 * Copyright (C) 2003-2006 Christophe Devine
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License, version 2.1 as published by the Free Software Foundation.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
23 * The SHA-1 standard was published by NIST in 1993.
25 * http://www.itl.nist.gov/fipspubs/fip180-1.htm
34 #define SHA1_SUM_POS -0x20
35 #define SHA1_SUM_LEN 20
38 * \brief SHA-1 context structure
42 unsigned long total[2]; /*!< number of bytes processed */
43 unsigned long state[5]; /*!< intermediate digest state */
44 unsigned char buffer[64]; /*!< data block being processed */
49 * \brief SHA-1 context setup
51 * \param ctx SHA-1 context to be initialized
53 void sha1_starts( sha1_context *ctx );
56 * \brief SHA-1 process buffer
58 * \param ctx SHA-1 context
59 * \param input buffer holding the data
60 * \param ilen length of the input data
62 void sha1_update( sha1_context *ctx, unsigned char *input, int ilen );
65 * \brief SHA-1 final digest
67 * \param ctx SHA-1 context
68 * \param output SHA-1 checksum result
70 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
73 * \brief Output = SHA-1( input buffer )
75 * \param input buffer holding the data
76 * \param ilen length of the input data
77 * \param output SHA-1 checksum result
79 void sha1_csum( unsigned char *input, int ilen,
80 unsigned char output[20] );
83 * \brief Output = SHA-1( input buffer ), with watchdog triggering
85 * \param input buffer holding the data
86 * \param ilen length of the input data
87 * \param output SHA-1 checksum result
88 * \param chunk_sz watchdog triggering period (in bytes of input processed)
90 void sha1_csum_wd (unsigned char *input, int ilen,
91 unsigned char output[20], unsigned int chunk_sz);
94 * \brief Output = SHA-1( file contents )
96 * \param path input file name
97 * \param output SHA-1 checksum result
98 * \return 0 if successful, or 1 if fopen failed
100 int sha1_file( char *path, unsigned char output[20] );
103 * \brief Output = HMAC-SHA-1( input buffer, hmac key )
105 * \param key HMAC secret key
106 * \param keylen length of the HMAC key
107 * \param input buffer holding the data
108 * \param ilen length of the input data
109 * \param output HMAC-SHA-1 result
111 void sha1_hmac( unsigned char *key, int keylen,
112 unsigned char *input, int ilen,
113 unsigned char output[20] );
116 * \brief Checkup routine
118 * \return 0 if successful, or 1 if the test failed
120 int sha1_self_test( void );