70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* Declaration of functions and data types used for SHA256 sum computing
|
|
library functions.
|
|
Copyright (C) 2007-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library 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.
|
|
|
|
The GNU C Library 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 the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SHA256_H
|
|
#define _SHA256_H 1
|
|
|
|
#include <limits.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <endian.h>
|
|
|
|
|
|
/* Structure to save state of computation between the single steps. */
|
|
struct sha256_ctx
|
|
{
|
|
uint32_t H[8];
|
|
|
|
union
|
|
{
|
|
uint64_t total64;
|
|
#define TOTAL64_low (1 - (BYTE_ORDER == LITTLE_ENDIAN))
|
|
#define TOTAL64_high (BYTE_ORDER == LITTLE_ENDIAN)
|
|
uint32_t total[2];
|
|
};
|
|
uint32_t buflen;
|
|
union
|
|
{
|
|
char buffer[128];
|
|
uint32_t buffer32[32];
|
|
uint64_t buffer64[16];
|
|
};
|
|
};
|
|
|
|
/* Initialize structure containing state of computation.
|
|
(FIPS 180-2: 5.3.2) */
|
|
extern void __sha256_init_ctx (struct sha256_ctx *ctx) __THROW;
|
|
|
|
/* 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) __THROW;
|
|
|
|
/* Process the remaining bytes in the buffer and put result from CTX
|
|
in first 32 bytes following RESBUF.
|
|
|
|
IMPORTANT: On some systems it is required that RESBUF is correctly
|
|
aligned for a 32 bits value. */
|
|
extern void *__sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf)
|
|
__THROW;
|
|
|
|
#endif /* sha256.h */
|