1/* Declaration of functions and data types used for SHA512 sum computing
2 library functions.
3 Copyright (C) 2007-2019 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#ifndef _SHA512_H
21#define _SHA512_H 1
22
23#include <limits.h>
24#include <stdint.h>
25#include <stdio.h>
26#include <endian.h>
27#include <bits/wordsize.h>
28
29
30/* Structure to save state of computation between the single steps. */
31struct sha512_ctx
32{
33 uint64_t H[8];
34
35 union
36 {
37#if defined __GNUC__ && __WORDSIZE == 64
38# define USE_TOTAL128
39 unsigned int total128 __attribute__ ((__mode__ (TI)));
40#endif
41#define TOTAL128_low (1 - (BYTE_ORDER == LITTLE_ENDIAN))
42#define TOTAL128_high (BYTE_ORDER == LITTLE_ENDIAN)
43 uint64_t total[2];
44 };
45 uint64_t buflen;
46 union
47 {
48 char buffer[256];
49 uint64_t buffer64[32];
50 };
51};
52
53/* Initialize structure containing state of computation.
54 (FIPS 180-2: 5.3.3) */
55extern void __sha512_init_ctx (struct sha512_ctx *ctx) __THROW;
56
57/* Starting with the result of former calls of this function (or the
58 initialization function update the context for the next LEN bytes
59 starting at BUFFER.
60 It is NOT required that LEN is a multiple of 128. */
61extern void __sha512_process_bytes (const void *buffer, size_t len,
62 struct sha512_ctx *ctx) __THROW;
63
64/* Process the remaining bytes in the buffer and put result from CTX
65 in first 64 bytes following RESBUF.
66
67 IMPORTANT: On some systems it is required that RESBUF is correctly
68 aligned for a 64 bits value. */
69extern void *__sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf)
70 __THROW;
71
72#endif /* sha512.h */
73