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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
|
/****************************************************************************
**
** Copyright (C) 2014 Jeremy Lainé <jeremy.laine@m4x.org>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsslkey.h"
#include "qsslkey_p.h"
#include "qasn1element_p.h"
#include <QtCore/qdatastream.h>
#include <QtCore/qcryptographichash.h>
#include <QtCore/qrandom.h>
QT_USE_NAMESPACE
static const quint8 bits_table[256] = {
0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
};
// OIDs of named curves allowed in TLS as per RFCs 4492 and 7027,
// see also https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8
typedef QMap<QByteArray, int> OidLengthMap;
static OidLengthMap createOidMap()
{
OidLengthMap oids;
oids.insert(oids.cend(), QByteArrayLiteral("1.2.840.10045.3.1.1"), 192); // secp192r1 a.k.a prime192v1
oids.insert(oids.cend(), QByteArrayLiteral("1.2.840.10045.3.1.7"), 256); // secp256r1 a.k.a prime256v1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.1"), 193); // sect193r2
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.10"), 256); // secp256k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.16"), 283); // sect283k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.17"), 283); // sect283r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.26"), 233); // sect233k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.27"), 233); // sect233r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.3"), 239); // sect239k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.30"), 160); // secp160r2
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.31"), 192); // secp192k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.32"), 224); // secp224k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.33"), 224); // secp224r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.34"), 384); // secp384r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.35"), 521); // secp521r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.36"), 409); // sect409k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.37"), 409); // sect409r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.38"), 571); // sect571k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.39"), 571); // sect571r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.8"), 160); // secp160r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.132.0.9"), 160); // secp160k1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.36.3.3.2.8.1.1.11"), 384); // brainpoolP384r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.36.3.3.2.8.1.1.13"), 521); // brainpoolP512r1
oids.insert(oids.cend(), QByteArrayLiteral("1.3.36.3.3.2.8.1.1.7"), 256); // brainpoolP256r1
return oids;
}
Q_GLOBAL_STATIC_WITH_ARGS(OidLengthMap, oidLengthMap, (createOidMap()))
static int curveBits(const QByteArray &oid)
{
const int length = oidLengthMap->value(oid);
return length ? length : -1;
}
static int numberOfBits(const QByteArray &modulus)
{
int bits = modulus.size() * 8;
for (int i = 0; i < modulus.size(); ++i) {
quint8 b = modulus[i];
bits -= 8;
if (b != 0) {
bits += bits_table[b];
break;
}
}
return bits;
}
static QByteArray deriveKey(QSslKeyPrivate::Cipher cipher, const QByteArray &passPhrase, const QByteArray &iv)
{
QByteArray key;
QCryptographicHash hash(QCryptographicHash::Md5);
hash.addData(passPhrase);
hash.addData(iv);
switch (cipher) {
case QSslKeyPrivate::DesCbc:
key = hash.result().left(8);
break;
case QSslKeyPrivate::DesEde3Cbc:
key = hash.result();
hash.reset();
hash.addData(key);
hash.addData(passPhrase);
hash.addData(iv);
key += hash.result().left(8);
break;
case QSslKeyPrivate::Rc2Cbc:
key = hash.result();
break;
}
return key;
}
void QSslKeyPrivate::clear(bool deep)
{
Q_UNUSED(deep);
isNull = true;
derData.clear();
keyLength = -1;
}
void QSslKeyPrivate::decodeDer(const QByteArray &der, bool deepClear)
{
clear(deepClear);
if (der.isEmpty())
return;
QAsn1Element elem;
if (!elem.read(der) || elem.type() != QAsn1Element::SequenceType)
return;
if (type == QSsl::PublicKey) {
// key info
QDataStream keyStream(elem.value());
if (!elem.read(keyStream) || elem.type() != QAsn1Element::SequenceType)
return;
const QVector<QAsn1Element> infoItems = elem.toVector();
if (infoItems.size() < 2 || infoItems[0].type() != QAsn1Element::ObjectIdentifierType)
return;
if (algorithm == QSsl::Rsa) {
if (infoItems[0].toObjectId() != RSA_ENCRYPTION_OID)
return;
// key data
if (!elem.read(keyStream) || elem.type() != QAsn1Element::BitStringType || elem.value().isEmpty())
return;
if (!elem.read(elem.value().mid(1)) || elem.type() != QAsn1Element::SequenceType)
return;
if (!elem.read(elem.value()) || elem.type() != QAsn1Element::IntegerType)
return;
keyLength = numberOfBits(elem.value());
} else if (algorithm == QSsl::Dsa) {
if (infoItems[0].toObjectId() != DSA_ENCRYPTION_OID)
return;
if (infoItems[1].type() != QAsn1Element::SequenceType)
return;
// key params
const QVector<QAsn1Element> params = infoItems[1].toVector();
if (params.isEmpty() || params[0].type() != QAsn1Element::IntegerType)
return;
keyLength = numberOfBits(params[0].value());
} else if (algorithm == QSsl::Ec) {
if (infoItems[0].toObjectId() != EC_ENCRYPTION_OID)
return;
if (infoItems[1].type() != QAsn1Element::ObjectIdentifierType)
return;
keyLength = curveBits(infoItems[1].toObjectId());
}
} else {
const QVector<QAsn1Element> items = elem.toVector();
if (items.isEmpty())
return;
// version
if (items[0].type() != QAsn1Element::IntegerType)
return;
const QByteArray versionHex = items[0].value().toHex();
if (algorithm == QSsl::Rsa) {
if (versionHex != "00")
return;
if (items.size() != 9 || items[1].type() != QAsn1Element::IntegerType)
return;
keyLength = numberOfBits(items[1].value());
} else if (algorithm == QSsl::Dsa) {
if (versionHex != "00")
return;
if (items.size() != 6 || items[1].type() != QAsn1Element::IntegerType)
return;
keyLength = numberOfBits(items[1].value());
} else if (algorithm == QSsl::Ec) {
if (versionHex != "01")
return;
if (items.size() != 4
|| items[1].type() != QAsn1Element::OctetStringType
|| items[2].type() != QAsn1Element::Context0Type
|| items[3].type() != QAsn1Element::Context1Type)
return;
QAsn1Element oidElem;
if (!oidElem.read(items[2].value())
|| oidElem.type() != QAsn1Element::ObjectIdentifierType)
return;
keyLength = curveBits(oidElem.toObjectId());
}
}
derData = der;
isNull = false;
}
void QSslKeyPrivate::decodePem(const QByteArray &pem, const QByteArray &passPhrase,
bool deepClear)
{
QMap<QByteArray, QByteArray> headers;
QByteArray data = derFromPem(pem, &headers);
if (headers.value("Proc-Type") == "4,ENCRYPTED") {
const QList<QByteArray> dekInfo = headers.value("DEK-Info").split(',');
if (dekInfo.size() != 2) {
clear(deepClear);
return;
}
Cipher cipher;
if (dekInfo.first() == "DES-CBC") {
cipher = DesCbc;
} else if (dekInfo.first() == "DES-EDE3-CBC") {
cipher = DesEde3Cbc;
} else if (dekInfo.first() == "RC2-CBC") {
cipher = Rc2Cbc;
} else {
clear(deepClear);
return;
}
const QByteArray iv = QByteArray::fromHex(dekInfo.last());
const QByteArray key = deriveKey(cipher, passPhrase, iv);
data = decrypt(cipher, data, key, iv);
}
decodeDer(data, deepClear);
}
int QSslKeyPrivate::length() const
{
return keyLength;
}
QByteArray QSslKeyPrivate::toPem(const QByteArray &passPhrase) const
{
QByteArray data;
QMap<QByteArray, QByteArray> headers;
if (type == QSsl::PrivateKey && !passPhrase.isEmpty()) {
// ### use a cryptographically secure random number generator
quint64 random = QRandomGenerator::generate64();
QByteArray iv = QByteArray::fromRawData(reinterpret_cast<const char *>(&random), sizeof(random));
Cipher cipher = DesEde3Cbc;
const QByteArray key = deriveKey(cipher, passPhrase, iv);
data = encrypt(cipher, derData, key, iv);
headers.insert("Proc-Type", "4,ENCRYPTED");
headers.insert("DEK-Info", "DES-EDE3-CBC," + iv.toHex());
} else {
data = derData;
}
return pemFromDer(data, headers);
}
Qt::HANDLE QSslKeyPrivate::handle() const
{
return opaque;
}
|
