library functions.
Copyright (C) 2000, 2001, 2003, 2005, 2006, 2008
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 2, 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, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef SHA1_H
# define SHA1_H 1
#include <stdio.h>
#if defined HAVE_LIMITS_H || _LIBC
# include <limits.h>
#endif
#include "ansidecl.h"
to determine an unsigned integral type that is 32 bits wide. An
alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
doing that would require that the configure script compile and *run*
the resulting executable. Locally running cross-compiled executables
is usually not possible. */
#ifdef _LIBC
# include <sys/types.h>
typedef u_int32_t sha1_uint32;
typedef uintptr_t sha1_uintptr;
#else
# define INT_MAX_32_BITS 2147483647
This should be valid for all systems GNU cares about because
that doesn't include 16-bit systems, and only modern systems
(that certainly have <limits.h>) have 64+-bit integral types. */
# ifndef INT_MAX
# define INT_MAX INT_MAX_32_BITS
# endif
# if INT_MAX == INT_MAX_32_BITS
typedef unsigned int sha1_uint32;
# else
# if SHRT_MAX == INT_MAX_32_BITS
typedef unsigned short sha1_uint32;
# else
# if LONG_MAX == INT_MAX_32_BITS
typedef unsigned long sha1_uint32;
# else
Using #error is not portable enough. */
"Cannot determine unsigned 32-bit data type."
# endif
# endif
# endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
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;
sha1_uint32 buffer[32];
};
extern void sha1_init_ctx (struct sha1_ctx *ctx);
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);
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);
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 be correctly
aligned for a 32 bits value. */
extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf);
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);
resulting message digest number will be written into the 20 bytes
beginning at RESBLOCK. */
extern int sha1_stream (FILE *stream, void *resblock);
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
