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 * SPDX-License-Identifier: LGPL-2.1
11 * The SHA-1 standard was published by NIST in 1993.
13 * http://www.itl.nist.gov/fipspubs/fip180-1.htm
22 #define SHA1_SUM_POS -0x20
23 #define SHA1_SUM_LEN 20
26 * \brief SHA-1 context structure
30 unsigned long total[2]; /*!< number of bytes processed */
31 unsigned long state[5]; /*!< intermediate digest state */
32 unsigned char buffer[64]; /*!< data block being processed */
37 * \brief SHA-1 context setup
39 * \param ctx SHA-1 context to be initialized
41 void sha1_starts( sha1_context *ctx );
44 * \brief SHA-1 process buffer
46 * \param ctx SHA-1 context
47 * \param input buffer holding the data
48 * \param ilen length of the input data
50 void sha1_update(sha1_context *ctx, const unsigned char *input,
54 * \brief SHA-1 final digest
56 * \param ctx SHA-1 context
57 * \param output SHA-1 checksum result
59 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
62 * \brief Output = SHA-1( input buffer )
64 * \param input buffer holding the data
65 * \param ilen length of the input data
66 * \param output SHA-1 checksum result
68 void sha1_csum(const unsigned char *input, unsigned int ilen,
69 unsigned char *output);
72 * \brief Output = SHA-1( input buffer ), with watchdog triggering
74 * \param input buffer holding the data
75 * \param ilen length of the input data
76 * \param output SHA-1 checksum result
77 * \param chunk_sz watchdog triggering period (in bytes of input processed)
79 void sha1_csum_wd(const unsigned char *input, unsigned int ilen,
80 unsigned char *output, unsigned int chunk_sz);
83 * \brief Output = HMAC-SHA-1( input buffer, hmac key )
85 * \param key HMAC secret key
86 * \param keylen length of the HMAC key
87 * \param input buffer holding the data
88 * \param ilen length of the input data
89 * \param output HMAC-SHA-1 result
91 void sha1_hmac(const unsigned char *key, int keylen,
92 const unsigned char *input, unsigned int ilen,
93 unsigned char *output);
96 * \brief Checkup routine
98 * \return 0 if successful, or 1 if the test failed
100 int sha1_self_test( void );