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
132
133
134
|
// Copyright (C) 2010-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015-2020 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ 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 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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 GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include "local.h"
// for older/broken versions of gnutls_hmac_init headers
namespace ucommon {
class __LOCAL __multicode
{
public:
int code;
inline operator HMAC_ID()
{return (HMAC_ID)code;}
inline operator MD_ID()
{return (MD_ID)code;}
};
void HMAC::release(void)
{
if(context) {
gnutls_hmac_deinit((HMAC_CTX)context, buffer);
context = NULL;
}
bufsize = 0;
textbuf[0] = 0;
hmacid = 0;
}
int __context::map_hmac(const char *type)
{
if(eq_case(type, "sha") || eq_case(type, "sha1") || eq_case(type, "sha160"))
return GNUTLS_MAC_SHA1;
else if(eq_case(type, "sha256"))
return GNUTLS_MAC_SHA256;
else if(eq_case(type, "sha224"))
return GNUTLS_MAC_SHA224;
else if(eq_case(type, "sha384"))
return GNUTLS_MAC_SHA384;
else if(eq_case(type, "sha512"))
return GNUTLS_MAC_SHA512;
else if(eq_case(type, "md5"))
return GNUTLS_MAC_MD5;
else if(eq_case(type, "md2"))
return GNUTLS_MAC_MD2;
else if(eq_case(type, "rmd160"))
return GNUTLS_MAC_RMD160;
else
return 0;
}
void HMAC::set(const char *digest, const secure::keybytes& key)
{
secure::init();
release();
size_t len = key.size() / 8;
if(!len)
return;
hmacid = __context::map_hmac(digest);
__multicode id;
id.code = hmacid;
if(hmacid)
gnutls_hmac_init((HMAC_CTX *)&context, id, *key, len);
}
bool HMAC::has(const char *type)
{
HMAC_ID id = (HMAC_ID)__context::map_hmac(type);
if(!id || (gnutls_hmac_get_len(id) < 1))
return false;
return true;
}
bool HMAC::put(const void *address, size_t size)
{
if(!context || hmacid == 0)
return false;
gnutls_hmac((HMAC_CTX)context, address, size);
return true;
}
const uint8_t *HMAC::get(void)
{
unsigned count = 0;
unsigned size = 0;
if(bufsize)
return buffer;
if(!context || hmacid == 0)
return NULL;
size = gnutls_hmac_get_len((HMAC_ID)hmacid);
release();
bufsize = size;
while(count < bufsize) {
snprintf(textbuf + (count * 2), 3, "%2.2x",
buffer[count]);
++count;
}
return buffer;
}
} // namespace ucommon
|
