mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-25 07:28:20 +00:00
92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/* Declarations of functions and data types used for SHA1 sum
|
|
library functions.
|
|
Copyright (C) 2000-2001, 2003, 2005-2006, 2008-2012 Free Software
|
|
Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the
|
|
Free Software Foundation; either version 3, or (at your option) any
|
|
later version.
|
|
|
|
This program 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 a copy of the GNU General Public License
|
|
along with this program; if not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef SHA1_H
|
|
# define SHA1_H 1
|
|
|
|
# include <stdio.h>
|
|
# include <stdint.h>
|
|
|
|
# ifdef __cplusplus
|
|
extern "C" {
|
|
# endif
|
|
|
|
#define SHA1_DIGEST_SIZE 20
|
|
|
|
/* Structure to save state of computation between the single steps. */
|
|
struct sha1_ctx
|
|
{
|
|
uint32_t A;
|
|
uint32_t B;
|
|
uint32_t C;
|
|
uint32_t D;
|
|
uint32_t E;
|
|
|
|
uint32_t total[2];
|
|
uint32_t buflen;
|
|
uint32_t buffer[32];
|
|
};
|
|
|
|
|
|
/* 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. */
|
|
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. */
|
|
extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf);
|
|
|
|
|
|
/* Compute SHA1 message digest for bytes read from STREAM. The
|
|
resulting message digest number will be written into the 20 bytes
|
|
beginning at RESBLOCK. */
|
|
extern int sha1_stream (FILE *stream, void *resblock);
|
|
|
|
/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. 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. */
|
|
extern void *sha1_buffer (const char *buffer, size_t len, void *resblock);
|
|
|
|
# ifdef __cplusplus
|
|
}
|
|
# endif
|
|
|
|
#endif
|