2 * SHA-1 Hash Function (FIPS 180-1, RFC 3174)
4 * (c) 2008 Martin Mares <mj@ucw.cz>
6 * Based on the code from libgcrypt-1.2.3, which was:
8 * Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
10 * This software may be freely distributed and used according to the terms
11 * of the GNU Lesser General Public License.
18 * Internal SHA1 state.
19 * You should use it just as an opaque handle only.
28 void sha1_init(sha1_context *hd); /** Initialize new algorithm run in the @hd context. **/
30 * Push another @inlen bytes of data pointed to by @inbuf onto the
31 * SHA1 hash currently in @hd. You can call this any times you want on
32 * the same hash (and you do not need to reinitialize it by
33 * sha1_init()). It has the same effect as concatenating all the data
34 * together and passing them at once.
36 void sha1_update(sha1_context *hd, const byte *inbuf, uns inlen);
38 * No more sha1_update() calls will be done. This terminates the hash
39 * and returns a pointer to it.
41 * Note that the pointer points into data in the @hd context. If it ceases
42 * to exist, the pointer becomes invalid.
44 * To convert the hash to its usual hexadecimal representation, see
45 * <<string:mem_to_hex()>>.
47 byte *sha1_final(sha1_context *hd);
50 * A convenience one-shot function for SHA1 hash.
51 * It is equivalent to this snippet of code:
55 * sha1_update(&hd, buffer, length);
56 * memcpy(outbuf, sha1_final(&hd), 20);
58 void sha1_hash_buffer(byte *outbuf, const byte *buffer, uns length);
61 * SHA1 HMAC message authentication. If you provide @key and @data,
62 * the result will be stored in @outbuf.
64 void sha1_hmac(byte *outbuf, const byte *key, uns keylen, const byte *data, uns datalen);
66 #define SHA1_SIZE 20 /** Size of the SHA1 hash in its binary representation **/
67 #define SHA1_HEX_SIZE 41 /** Buffer length for a string containing SHA1 in hexadecimal format. **/
68 #define SHA1_BLOCK_SIZE 64 /** SHA1 splits input to blocks of this size. **/