1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
* Ouroboros - Copyright (C) 2016 - 2024
*
* Hashing
*
* Dimitri Staessens <dimitri@ouroboros.rocks>
* Sander Vrijders <sander@ouroboros.rocks>
*
* This implementation is adapted and redistributed from the RHASH
* project
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., http://www.fsf.org/about/contact/.
*/
#if defined(__linux__) || defined(__CYGWIN__)
#define _DEFAULT_SOURCE
#endif
#include "config.h"
#include <ouroboros/hash.h>
#ifdef HAVE_LIBGCRYPT
#include <gcrypt.h>
#else
#include <ouroboros/crc32.h>
#include <ouroboros/md5.h>
#include <ouroboros/sha3.h>
#endif
#include <string.h>
#include <assert.h>
#include <stdbool.h>
#ifdef HAVE_LIBGCRYPT
int gcry_algo_tbl [] = {
/* DIR_HASH policies first */
GCRY_MD_SHA3_224,
GCRY_MD_SHA3_256,
GCRY_MD_SHA3_384,
GCRY_MD_SHA3_512,
/* Below for internal use only */
GCRY_MD_CRC32,
GCRY_MD_MD5,
};
#else
int hash_len_tbl [] = {
/* DIR_HASH policies first */
SHA3_224_HASH_LEN,
SHA3_256_HASH_LEN,
SHA3_384_HASH_LEN,
SHA3_512_HASH_LEN,
/* Below for internal use only */
CRC32_HASH_LEN,
MD5_HASH_LEN
};
#endif
uint16_t hash_len(enum hash_algo algo)
{
#ifdef HAVE_LIBGCRYPT
return (uint16_t) gcry_md_get_algo_dlen(gcry_algo_tbl[algo]);
#else
return hash_len_tbl[algo];
#endif
}
void mem_hash(enum hash_algo algo,
void * dst,
const uint8_t * buf,
size_t len)
{
#ifdef HAVE_LIBGCRYPT
gcry_md_hash_buffer(gcry_algo_tbl[algo], dst, buf, len);
#else
struct sha3_ctx sha3_ctx;
struct md5_ctx md5_ctx;
switch (algo) {
case HASH_CRC32:
memset(dst, 0, CRC32_HASH_LEN);
crc32((uint32_t *) dst, buf, len);
break;
case HASH_MD5:
rhash_md5_init(&md5_ctx);
rhash_md5_update(&md5_ctx, buf, len);
rhash_md5_final(&md5_ctx, (uint8_t *) dst);
break;
case HASH_SHA3_224:
rhash_sha3_224_init(&sha3_ctx);
rhash_sha3_update(&sha3_ctx, buf, len);
rhash_sha3_final(&sha3_ctx, (uint8_t *) dst);
break;
case HASH_SHA3_256:
rhash_sha3_256_init(&sha3_ctx);
rhash_sha3_update(&sha3_ctx, buf, len);
rhash_sha3_final(&sha3_ctx, (uint8_t *) dst);
break;
case HASH_SHA3_384:
rhash_sha3_384_init(&sha3_ctx);
rhash_sha3_update(&sha3_ctx, buf, len);
rhash_sha3_final(&sha3_ctx, (uint8_t *) dst);
break;
case HASH_SHA3_512:
rhash_sha3_512_init(&sha3_ctx);
rhash_sha3_update(&sha3_ctx, buf, len);
rhash_sha3_final(&sha3_ctx, (uint8_t *) dst);
break;
default:
assert(false);
break;
}
#endif
}
void str_hash(enum hash_algo algo,
void * dst,
const char * str)
{
return mem_hash(algo, dst, (const uint8_t *) str, strlen(str));
}
|
