| /* Declaration of functions and data types used for SHA1 sum computing |
| library functions. |
| Copyright (C) 2008 Red Hat, Inc. |
| This file is part of elfutils. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2008. |
| |
| This file is free software; you can redistribute it and/or modify |
| it under the terms of either |
| |
| * the GNU Lesser General Public License as published by the Free |
| Software Foundation; either version 3 of the License, or (at |
| your option) any later version |
| |
| or |
| |
| * the GNU General Public License as published by the Free |
| Software Foundation; either version 2 of the License, or (at |
| your option) any later version |
| |
| or both in parallel, as here. |
| |
| elfutils is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received copies of the GNU General Public License and |
| the GNU Lesser General Public License along with this program. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SHA1_H |
| #define _SHA1_H 1 |
| |
| #include <limits.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| |
| #define SHA1_DIGEST_SIZE 20 |
| #define SHA1_BLOCK_SIZE 64 |
| |
| typedef uint32_t sha1_uint32; |
| typedef uintptr_t sha1_uintptr; |
| |
| /* Structure to save state of computation between the single steps. */ |
| struct sha1_ctx |
| { |
| sha1_uint32 A; |
| sha1_uint32 B; |
| sha1_uint32 C; |
| sha1_uint32 D; |
| sha1_uint32 E; |
| |
| sha1_uint32 total[2]; |
| sha1_uint32 buflen; |
| char buffer[128] __attribute__ ((__aligned__ (__alignof__ (sha1_uint32)))); |
| }; |
| |
| /* Initialize structure containing state of computation. */ |
| extern void sha1_init_ctx (struct sha1_ctx *ctx); |
| |
| /* Starting with the result of former calls of this function (or the |
| initialization function update the context for the next LEN bytes |
| starting at BUFFER. |
| It is necessary that LEN is a multiple of 64!!! */ |
| extern void sha1_process_block (const void *buffer, size_t len, |
| struct sha1_ctx *ctx); |
| |
| /* Starting with the result of former calls of this function (or the |
| initialization function update the context for the next LEN bytes |
| starting at BUFFER. |
| It is NOT required that LEN is a multiple of 64. */ |
| extern void sha1_process_bytes (const void *buffer, size_t len, |
| struct sha1_ctx *ctx); |
| |
| /* Process the remaining bytes in the buffer and put result from CTX |
| in first 20 bytes following RESBUF. The result is always in little |
| endian byte order, so that a byte-wise output yields to the wanted |
| ASCII representation of the message digest. |
| |
| IMPORTANT: On some systems it is required that RESBUF is correctly |
| aligned for a 32 bits value. */ |
| extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); |
| |
| |
| /* Put result from CTX in first 20 bytes following RESBUF. The result is |
| always in little endian byte order, so that a byte-wise output yields |
| to the wanted ASCII representation of the message digest. |
| |
| IMPORTANT: On some systems it is required that RESBUF is correctly |
| aligned for a 32 bits value. */ |
| extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf); |
| |
| #endif /* sha1.h */ |