mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-12 09:28:24 +00:00
125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/* Declarations of functions and data types used for SHA512 and SHA384 sum
|
|
library functions.
|
|
Copyright (C) 2005-2006, 2008-2022 Free Software Foundation, Inc.
|
|
|
|
This file is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation; either version 2.1 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This file 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 Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef SHA512_H
|
|
# define SHA512_H 1
|
|
|
|
# include <stdio.h>
|
|
# include "u64.h"
|
|
|
|
# if HAVE_OPENSSL_SHA512
|
|
# ifndef OPENSSL_API_COMPAT
|
|
# define OPENSSL_API_COMPAT 0x10101000L /* FIXME: Use OpenSSL 1.1+ API. */
|
|
# endif
|
|
# include <openssl/sha.h>
|
|
# endif
|
|
|
|
# ifdef __cplusplus
|
|
extern "C" {
|
|
# endif
|
|
|
|
enum { SHA384_DIGEST_SIZE = 384 / 8 };
|
|
enum { SHA512_DIGEST_SIZE = 512 / 8 };
|
|
|
|
# if HAVE_OPENSSL_SHA512
|
|
# define GL_OPENSSL_NAME 384
|
|
# include "gl_openssl.h"
|
|
# define GL_OPENSSL_NAME 512
|
|
# include "gl_openssl.h"
|
|
# else
|
|
/* Structure to save state of computation between the single steps. */
|
|
struct sha512_ctx
|
|
{
|
|
u64 state[8];
|
|
|
|
u64 total[2];
|
|
size_t buflen; /* ≥ 0, ≤ 256 */
|
|
u64 buffer[32]; /* 256 bytes; the first buflen bytes are in use */
|
|
};
|
|
|
|
/* Initialize structure containing state of computation. */
|
|
extern void sha512_init_ctx (struct sha512_ctx *ctx);
|
|
extern void sha384_init_ctx (struct sha512_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 128!!! */
|
|
extern void sha512_process_block (const void *buffer, size_t len,
|
|
struct sha512_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 128. */
|
|
extern void sha512_process_bytes (const void *buffer, size_t len,
|
|
struct sha512_ctx *ctx);
|
|
|
|
/* Process the remaining bytes in the buffer and put result from CTX
|
|
in first 64 (48) 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 *sha512_finish_ctx (struct sha512_ctx *ctx, void *restrict resbuf);
|
|
extern void *sha384_finish_ctx (struct sha512_ctx *ctx, void *restrict resbuf);
|
|
|
|
|
|
/* Put result from CTX in first 64 (48) 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 *sha512_read_ctx (const struct sha512_ctx *ctx,
|
|
void *restrict resbuf);
|
|
extern void *sha384_read_ctx (const struct sha512_ctx *ctx,
|
|
void *restrict resbuf);
|
|
|
|
|
|
/* Compute SHA512 (SHA384) 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 *sha512_buffer (const char *buffer, size_t len,
|
|
void *restrict resblock);
|
|
extern void *sha384_buffer (const char *buffer, size_t len,
|
|
void *restrict resblock);
|
|
|
|
# endif
|
|
|
|
/* Compute SHA512 (SHA384) message digest for bytes read from STREAM.
|
|
STREAM is an open file stream. Regular files are handled more efficiently.
|
|
The contents of STREAM from its current position to its end will be read.
|
|
The case that the last operation on STREAM was an 'ungetc' is not supported.
|
|
The resulting message digest number will be written into the 64 (48) bytes
|
|
beginning at RESBLOCK. */
|
|
extern int sha512_stream (FILE *stream, void *resblock);
|
|
extern int sha384_stream (FILE *stream, void *resblock);
|
|
|
|
|
|
# ifdef __cplusplus
|
|
}
|
|
# endif
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Hey Emacs!
|
|
* Local Variables:
|
|
* coding: utf-8
|
|
* End:
|
|
*/
|