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. |
| 4 | This file is part of Red Hat elfutils. |
| 5 | Written by Ulrich Drepper <drepper@redhat.com>, 2008. |
| 6 | |
| 7 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by the |
| 9 | Free Software Foundation; version 2 of the License. |
| 10 | |
| 11 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License along |
| 17 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 18 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 19 | |
| 20 | Red Hat elfutils is an included package of the Open Invention Network. |
| 21 | An included package of the Open Invention Network is a package for which |
| 22 | Open Invention Network licensees cross-license their patents. No patent |
| 23 | license is granted, either expressly or impliedly, by designation as an |
| 24 | included package. Should you wish to participate in the Open Invention |
| 25 | Network licensing program, please visit www.openinventionnetwork.com |
| 26 | <http://www.openinventionnetwork.com>. */ |
| 27 | |
| 28 | #ifndef _SHA1_H |
| 29 | #define _SHA1_H 1 |
| 30 | |
| 31 | #include <limits.h> |
| 32 | #include <stdint.h> |
| 33 | #include <stdio.h> |
| 34 | |
| 35 | #define SHA1_DIGEST_SIZE 20 |
| 36 | #define SHA1_BLOCK_SIZE 64 |
| 37 | |
| 38 | typedef uint32_t sha1_uint32; |
| 39 | typedef uintptr_t sha1_uintptr; |
| 40 | |
| 41 | /* Structure to save state of computation between the single steps. */ |
| 42 | struct sha1_ctx |
| 43 | { |
| 44 | sha1_uint32 A; |
| 45 | sha1_uint32 B; |
| 46 | sha1_uint32 C; |
| 47 | sha1_uint32 D; |
| 48 | sha1_uint32 E; |
| 49 | |
| 50 | sha1_uint32 total[2]; |
| 51 | sha1_uint32 buflen; |
| 52 | char buffer[128] __attribute__ ((__aligned__ (__alignof__ (sha1_uint32)))); |
| 53 | }; |
| 54 | |
| 55 | /* Initialize structure containing state of computation. */ |
| 56 | extern void sha1_init_ctx (struct sha1_ctx *ctx); |
| 57 | |
| 58 | /* Starting with the result of former calls of this function (or the |
| 59 | initialization function update the context for the next LEN bytes |
| 60 | starting at BUFFER. |
| 61 | It is necessary that LEN is a multiple of 64!!! */ |
| 62 | extern void sha1_process_block (const void *buffer, size_t len, |
| 63 | struct sha1_ctx *ctx); |
| 64 | |
| 65 | /* Starting with the result of former calls of this function (or the |
| 66 | initialization function update the context for the next LEN bytes |
| 67 | starting at BUFFER. |
| 68 | It is NOT required that LEN is a multiple of 64. */ |
| 69 | extern void sha1_process_bytes (const void *buffer, size_t len, |
| 70 | struct sha1_ctx *ctx); |
| 71 | |
| 72 | /* Process the remaining bytes in the buffer and put result from CTX |
| 73 | in first 20 bytes following RESBUF. The result is always in little |
| 74 | endian byte order, so that a byte-wise output yields to the wanted |
| 75 | ASCII representation of the message digest. |
| 76 | |
| 77 | IMPORTANT: On some systems it is required that RESBUF is correctly |
| 78 | aligned for a 32 bits value. */ |
| 79 | extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); |
| 80 | |
| 81 | |
| 82 | /* Put result from CTX in first 20 bytes following RESBUF. The result is |
| 83 | always in little endian byte order, so that a byte-wise output yields |
| 84 | to the wanted ASCII representation of the message digest. |
| 85 | |
| 86 | IMPORTANT: On some systems it is required that RESBUF is correctly |
| 87 | aligned for a 32 bits value. */ |
| 88 | extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf); |
| 89 | |
| 90 | #endif /* sha1.h */ |