| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: sha.h,v 1.1 2000/05/21 11:28:30 mdw Exp $ |
| 4 | * |
| 5 | * Implementation of the SHA-1 hash function |
| 6 | * |
| 7 | * (c) 1999 Straylight/Edgeware |
| 8 | * (c) 2000 Mark Wooding |
| 9 | */ |
| 10 | |
| 11 | /*----- Licensing notice --------------------------------------------------* |
| 12 | * |
| 13 | * Copyright (c) 2000 Mark Wooding |
| 14 | * All rights reserved. |
| 15 | * |
| 16 | * Redistribution and use in source and binary forms, with or without |
| 17 | * modification, are permitted provided that the following conditions are |
| 18 | * met: |
| 19 | * |
| 20 | * 1. Redistributions of source code must retain the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer. |
| 22 | * |
| 23 | * 2, Redistributions in binary form must reproduce the above copyright |
| 24 | * notice, this list of conditions and the following disclaimer in the |
| 25 | * documentation and/or other materials provided with the distribution. |
| 26 | * |
| 27 | * 3. The name of the authors may not be used to endorse or promote |
| 28 | * products derived from this software without specific prior written |
| 29 | * permission. |
| 30 | * |
| 31 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 32 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 33 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 34 | * NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| 35 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 36 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 37 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 40 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGE. |
| 42 | * |
| 43 | * Instead of accepting the above terms, you may redistribute and/or modify |
| 44 | * this software under the terms of either the GNU General Public License, |
| 45 | * or the GNU Library General Public License, published by the Free |
| 46 | * Software Foundation; either version 2 of the License, or (at your |
| 47 | * option) any later version. |
| 48 | */ |
| 49 | |
| 50 | #ifndef SHA_H |
| 51 | #define SHA_H |
| 52 | |
| 53 | #ifdef __cplusplus |
| 54 | extern "C" { |
| 55 | #endif |
| 56 | |
| 57 | /*----- Magic numbers -----------------------------------------------------*/ |
| 58 | |
| 59 | #define SHA_BUFSZ 64 |
| 60 | #define SHA_HASHSZ 20 |
| 61 | |
| 62 | /*----- Data structures ---------------------------------------------------*/ |
| 63 | |
| 64 | typedef struct sha_ctx { |
| 65 | uint32 a, b, c, d, e; /* Chaining variables */ |
| 66 | uint32 nl, nh; /* Byte count so far */ |
| 67 | int off; /* Offset into buffer */ |
| 68 | octet buf[SHA_BUFSZ]; /* Accumulation buffer */ |
| 69 | } sha_ctx; |
| 70 | |
| 71 | /*----- Functions provided ------------------------------------------------*/ |
| 72 | |
| 73 | /* --- @sha_compress@ --- * |
| 74 | * |
| 75 | * Arguments: @sha_ctx *ctx@ = pointer to context block |
| 76 | * @const void *sbuf@ = pointer to buffer of appropriate size |
| 77 | * |
| 78 | * Returns: --- |
| 79 | * |
| 80 | * Use: SHA compression function. |
| 81 | */ |
| 82 | |
| 83 | extern void sha_compress(sha_ctx */*ctx*/, const void */*sbuf*/); |
| 84 | |
| 85 | /* --- @sha_init@ --- * |
| 86 | * |
| 87 | * Arguments: @sha_ctx *ctx@ = pointer to context block to initialize |
| 88 | * |
| 89 | * Returns: --- |
| 90 | * |
| 91 | * Use: Initializes a context block ready for hashing. |
| 92 | */ |
| 93 | |
| 94 | extern void sha_init(sha_ctx *ctx); |
| 95 | |
| 96 | /* --- @sha_hash@ --- * |
| 97 | * |
| 98 | * Arguments: @sha_ctx *ctx@ = pointer to context block |
| 99 | * @const void *buf@ = buffer of data to hash |
| 100 | * @size_t sz@ = size of buffer to hash |
| 101 | * |
| 102 | * Returns: --- |
| 103 | * |
| 104 | * Use: Hashes a buffer of data. The buffer may be of any size and |
| 105 | * alignment. |
| 106 | */ |
| 107 | |
| 108 | extern void sha_hash(sha_ctx */*ctx*/, const void */*buf*/, size_t /*sz*/); |
| 109 | |
| 110 | /* --- @sha_done@ --- * |
| 111 | * |
| 112 | * Arguments: @sha_ctx *ctx@ = pointer to context block |
| 113 | * @void *hash@ = pointer to output buffer |
| 114 | * |
| 115 | * Returns: --- |
| 116 | * |
| 117 | * Use: Returns the hash of the data read so far. |
| 118 | */ |
| 119 | |
| 120 | extern void sha_done(sha_ctx */*ctx*/, void */*hash*/); |
| 121 | |
| 122 | /*----- That's all, folks -------------------------------------------------*/ |
| 123 | |
| 124 | #ifdef __cplusplus |
| 125 | } |
| 126 | #endif |
| 127 | |
| 128 | #endif |