Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Declaration of functions and data types used for SHA1 sum computing |
| 2 | library functions. |
| 3 | Copyright (C) 2008 Red Hat, Inc. |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 4 | This file is part of elfutils. |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 5 | Written by Ulrich Drepper <drepper@redhat.com>, 2008. |
| 6 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 7 | This file is free software; you can redistribute it and/or modify |
| 8 | it under the terms of either |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 9 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 10 | * the GNU Lesser General Public License as published by the Free |
| 11 | Software Foundation; either version 3 of the License, or (at |
| 12 | your option) any later version |
| 13 | |
| 14 | or |
| 15 | |
| 16 | * the GNU General Public License as published by the Free |
| 17 | Software Foundation; either version 2 of the License, or (at |
| 18 | your option) any later version |
| 19 | |
| 20 | or both in parallel, as here. |
| 21 | |
| 22 | elfutils is distributed in the hope that it will be useful, but |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 23 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 25 | General Public License for more details. |
| 26 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 27 | You should have received copies of the GNU General Public License and |
| 28 | the GNU Lesser General Public License along with this program. If |
| 29 | not, see <http://www.gnu.org/licenses/>. */ |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 30 | |
| 31 | #ifndef _SHA1_H |
| 32 | #define _SHA1_H 1 |
| 33 | |
| 34 | #include <limits.h> |
| 35 | #include <stdint.h> |
| 36 | #include <stdio.h> |
| 37 | |
| 38 | #define SHA1_DIGEST_SIZE 20 |
| 39 | #define SHA1_BLOCK_SIZE 64 |
| 40 | |
| 41 | typedef uint32_t sha1_uint32; |
| 42 | typedef uintptr_t sha1_uintptr; |
| 43 | |
| 44 | /* Structure to save state of computation between the single steps. */ |
| 45 | struct sha1_ctx |
| 46 | { |
| 47 | sha1_uint32 A; |
| 48 | sha1_uint32 B; |
| 49 | sha1_uint32 C; |
| 50 | sha1_uint32 D; |
| 51 | sha1_uint32 E; |
| 52 | |
| 53 | sha1_uint32 total[2]; |
| 54 | sha1_uint32 buflen; |
| 55 | char buffer[128] __attribute__ ((__aligned__ (__alignof__ (sha1_uint32)))); |
| 56 | }; |
| 57 | |
| 58 | /* Initialize structure containing state of computation. */ |
| 59 | extern void sha1_init_ctx (struct sha1_ctx *ctx); |
| 60 | |
| 61 | /* Starting with the result of former calls of this function (or the |
| 62 | initialization function update the context for the next LEN bytes |
| 63 | starting at BUFFER. |
| 64 | It is necessary that LEN is a multiple of 64!!! */ |
| 65 | extern void sha1_process_block (const void *buffer, size_t len, |
| 66 | struct sha1_ctx *ctx); |
| 67 | |
| 68 | /* Starting with the result of former calls of this function (or the |
| 69 | initialization function update the context for the next LEN bytes |
| 70 | starting at BUFFER. |
| 71 | It is NOT required that LEN is a multiple of 64. */ |
| 72 | extern void sha1_process_bytes (const void *buffer, size_t len, |
| 73 | struct sha1_ctx *ctx); |
| 74 | |
| 75 | /* Process the remaining bytes in the buffer and put result from CTX |
| 76 | in first 20 bytes following RESBUF. The result is always in little |
| 77 | endian byte order, so that a byte-wise output yields to the wanted |
| 78 | ASCII representation of the message digest. |
| 79 | |
| 80 | IMPORTANT: On some systems it is required that RESBUF is correctly |
| 81 | aligned for a 32 bits value. */ |
| 82 | extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); |
| 83 | |
| 84 | |
| 85 | /* Put result from CTX in first 20 bytes following RESBUF. The result is |
| 86 | always in little endian byte order, so that a byte-wise output yields |
| 87 | to the wanted ASCII representation of the message digest. |
| 88 | |
| 89 | IMPORTANT: On some systems it is required that RESBUF is correctly |
| 90 | aligned for a 32 bits value. */ |
| 91 | extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf); |
| 92 | |
| 93 | #endif /* sha1.h */ |