Dibbler - a portable DHCPv6  1.0.2RC1
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sha512.h
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1 /* Declarations of functions and data types used for SHA512 and SHA384 sum
2  library functions.
3  Copyright (C) 2005, 2006 Free Software Foundation, Inc.
4 
5  This program is free software; you can redistribute it and/or modify it
6  under the terms of the GNU General Public License as published by the
7  Free Software Foundation; either version 2, or (at your option) any
8  later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program; if not, write to the Free Software Foundation,
17  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 
19 /* This file is taken from coreutils-6.2 (lib/sha512.h) and adapted for dibbler
20  * by Michal Kowalczuk <michal@kowalczuk.eu> */
21 
22 #ifndef SHA512_H
23 # define SHA512_H 1
24 
25 # include <stdio.h>
26 # include <stdint.h>
27 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
32 #define SHA384_BLOCKSIZE 128
33 #define SHA384_DIGESTSIZE 48
34 #define SHA512_BLOCKSIZE 128
35 #define SHA512_DIGESTSIZE 64
36 
37 /* Structure to save state of computation between the single steps. */
38 struct sha512_ctx
39 {
40  uint64_t state[8];
41 
42  uint64_t total[2];
43  uint64_t buflen;
44  uint64_t buffer[32];
45 };
46 
47 
48 /* Initialize structure containing state of computation. */
49 extern void sha512_init_ctx (struct sha512_ctx *ctx);
50 extern void sha384_init_ctx (struct sha512_ctx *ctx);
51 
52 /* Starting with the result of former calls of this function (or the
53  initialization function update the context for the next LEN bytes
54  starting at BUFFER.
55  It is necessary that LEN is a multiple of 128!!! */
56 extern void sha512_process_block (const void *buffer, size_t len,
57  struct sha512_ctx *ctx);
58 
59 /* Starting with the result of former calls of this function (or the
60  initialization function update the context for the next LEN bytes
61  starting at BUFFER.
62  It is NOT required that LEN is a multiple of 128. */
63 extern void sha512_process_bytes (const void *buffer, size_t len,
64  struct sha512_ctx *ctx);
65 
66 /* Process the remaining bytes in the buffer and put result from CTX
67  in first 64 (48) bytes following RESBUF. The result is always in little
68  endian byte order, so that a byte-wise output yields to the wanted
69  ASCII representation of the message digest.
70 
71  IMPORTANT: On some systems it is required that RESBUF be correctly
72  aligned for a 64 bits value. */
73 extern void *sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf);
74 extern void *sha384_finish_ctx (struct sha512_ctx *ctx, void *resbuf);
75 
76 
77 /* Put result from CTX in first 64 (48) bytes following RESBUF. The result is
78  always in little endian byte order, so that a byte-wise output yields
79  to the wanted ASCII representation of the message digest.
80 
81  IMPORTANT: On some systems it is required that RESBUF is correctly
82  aligned for a 32 bits value. */
83 extern void *sha512_read_ctx (const struct sha512_ctx *ctx, void *resbuf);
84 extern void *sha384_read_ctx (const struct sha512_ctx *ctx, void *resbuf);
85 
86 # define rol64(x,n) ( ((x) << (n)) | ((x) >> (64-(n))) )
87 
88 #ifdef __cplusplus
89 }
90 #endif
91 
92 #endif
93