mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2025-01-05 11:45:45 +00:00
e9551b12f8
On commonly used platform libcrypto uses architecture-specific assembly code, which is significantly faster than the C code we were using. See Pádraig Brady's note in <http://lists.gnu.org/archive/html/bug-gnulib/2013-12/msg00000.html>. Merge from gnulib, incorporating: 2013-12-07 md5, sha1, sha256, sha512: add gl_SET_CRYPTO_CHECK_DEFAULT 2013-12-07 md5, sha1, sha256, sha512: add 'auto', and set-default method 2013-12-04 include_next: minimize code duplication 2013-12-03 md5, sha1, sha256, sha512: support mandating use of openssl 2013-12-02 md5, sha1, sha256, sha512: use openssl routines if available * configure.ac (--without-all): Set with_openssl_default too. Use gl_SET_CRYPTO_CHECK_DEFAULT to default to 'auto'. (HAVE_LIB_CRYPTO): New var. Say whether Emacs is configured to use a crypto library. * lib/gl_openssl.h, m4/absolute-header.m4, m4/gl-openssl.m4: New files, copied from gnulib. * lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate. * lib/md5.c, lib/md5.h, lib/sha1.c, lib/sha1.h: * lib/sha256.c, lib/sha256.h, lib/sha512.c, lib/sha512.h: * m4/include_next.m4, m4/md5.m4, m4/sha1.m4, m4/sha256.m4, m4/sha512.m4: Update from gnulib. * src/Makefile.in (LIB_CRYPTO): New macro. (LIBES): Use it.
104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/* Declarations of functions and data types used for SHA256 and SHA224 sum
|
|
library functions.
|
|
Copyright (C) 2005-2006, 2008-2013 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 of the License, 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 SHA256_H
|
|
# define SHA256_H 1
|
|
|
|
# include <stdio.h>
|
|
# include <stdint.h>
|
|
|
|
# if HAVE_OPENSSL_SHA256
|
|
# include <openssl/sha.h>
|
|
# endif
|
|
|
|
# ifdef __cplusplus
|
|
extern "C" {
|
|
# endif
|
|
|
|
enum { SHA224_DIGEST_SIZE = 224 / 8 };
|
|
enum { SHA256_DIGEST_SIZE = 256 / 8 };
|
|
|
|
# if HAVE_OPENSSL_SHA256
|
|
# define GL_OPENSSL_NAME 224
|
|
# include "gl_openssl.h"
|
|
# define GL_OPENSSL_NAME 256
|
|
# include "gl_openssl.h"
|
|
# else
|
|
/* Structure to save state of computation between the single steps. */
|
|
struct sha256_ctx
|
|
{
|
|
uint32_t state[8];
|
|
|
|
uint32_t total[2];
|
|
size_t buflen;
|
|
uint32_t buffer[32];
|
|
};
|
|
|
|
/* Initialize structure containing state of computation. */
|
|
extern void sha256_init_ctx (struct sha256_ctx *ctx);
|
|
extern void sha224_init_ctx (struct sha256_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 sha256_process_block (const void *buffer, size_t len,
|
|
struct sha256_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 sha256_process_bytes (const void *buffer, size_t len,
|
|
struct sha256_ctx *ctx);
|
|
|
|
/* Process the remaining bytes in the buffer and put result from CTX
|
|
in first 32 (28) 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 *sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf);
|
|
extern void *sha224_finish_ctx (struct sha256_ctx *ctx, void *resbuf);
|
|
|
|
|
|
/* Put result from CTX in first 32 (28) 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 *sha256_read_ctx (const struct sha256_ctx *ctx, void *resbuf);
|
|
extern void *sha224_read_ctx (const struct sha256_ctx *ctx, void *resbuf);
|
|
|
|
|
|
/* Compute SHA256 (SHA224) 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 *sha256_buffer (const char *buffer, size_t len, void *resblock);
|
|
extern void *sha224_buffer (const char *buffer, size_t len, void *resblock);
|
|
|
|
# endif
|
|
/* Compute SHA256 (SHA224) message digest for bytes read from STREAM. The
|
|
resulting message digest number will be written into the 32 (28) bytes
|
|
beginning at RESBLOCK. */
|
|
extern int sha256_stream (FILE *stream, void *resblock);
|
|
extern int sha224_stream (FILE *stream, void *resblock);
|
|
|
|
|
|
# ifdef __cplusplus
|
|
}
|
|
# endif
|
|
|
|
#endif
|