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
|
/*
* Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 or (at your option)
* version 3 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "CryptoHash.h"
#include <gcrypt.h>
#include "crypto/Crypto.h"
class CryptoHashPrivate
{
public:
gcry_md_hd_t ctx;
int hashLen;
};
CryptoHash::CryptoHash(Algorithm algo, bool hmac)
: d_ptr(new CryptoHashPrivate())
{
Q_D(CryptoHash);
Q_ASSERT(Crypto::initalized());
int algoGcrypt = -1;
unsigned int flagsGcrypt = GCRY_MD_FLAG_SECURE;
switch (algo) {
case CryptoHash::Sha256:
algoGcrypt = GCRY_MD_SHA256;
break;
case CryptoHash::Sha512:
algoGcrypt = GCRY_MD_SHA512;
break;
default:
Q_ASSERT(false);
break;
}
if (hmac) {
flagsGcrypt |= GCRY_MD_FLAG_HMAC;
}
gcry_error_t error = gcry_md_open(&d->ctx, algoGcrypt, flagsGcrypt);
if (error != GPG_ERR_NO_ERROR) {
qWarning("Gcrypt error (ctor): %s", gcry_strerror(error));
qWarning("Gcrypt error (ctor): %s", gcry_strsource(error));
}
Q_ASSERT(error == 0); // TODO: error handling
d->hashLen = gcry_md_get_algo_dlen(algoGcrypt);
}
CryptoHash::~CryptoHash()
{
Q_D(CryptoHash);
gcry_md_close(d->ctx);
delete d_ptr;
}
void CryptoHash::addData(const QByteArray& data)
{
Q_D(CryptoHash);
if (data.isEmpty()) {
return;
}
gcry_md_write(d->ctx, data.constData(), static_cast<size_t>(data.size()));
}
void CryptoHash::setKey(const QByteArray& data)
{
Q_D(CryptoHash);
gcry_error_t error = gcry_md_setkey(d->ctx, data.constData(), static_cast<size_t>(data.size()));
if (error) {
qWarning("Gcrypt error (setKey): %s", gcry_strerror(error));
qWarning("Gcrypt error (setKey): %s", gcry_strsource(error));
}
Q_ASSERT(error == 0);
}
void CryptoHash::reset()
{
Q_D(CryptoHash);
gcry_md_reset(d->ctx);
}
QByteArray CryptoHash::result() const
{
Q_D(const CryptoHash);
const auto result = reinterpret_cast<const char*>(gcry_md_read(d->ctx, 0));
return QByteArray(result, d->hashLen);
}
QByteArray CryptoHash::hash(const QByteArray& data, Algorithm algo)
{
// replace with gcry_md_hash_buffer()?
CryptoHash cryptoHash(algo);
cryptoHash.addData(data);
return cryptoHash.result();
}
QByteArray CryptoHash::hmac(const QByteArray& data, const QByteArray& key, Algorithm algo)
{
// replace with gcry_md_hash_buffer()?
CryptoHash cryptoHash(algo, true);
cryptoHash.setKey(key);
cryptoHash.addData(data);
return cryptoHash.result();
}
|
