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
|
// Copyright 2005-2019 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#include "SSL.h"
#include "SSLLocks.h"
#include "Version.h"
void MumbleSSL::initialize() {
// Let Qt initialize its copy of OpenSSL, if it's different than
// Mumble's. (Initialization is a side-effect of calling
// QSslSocket::supportsSsl()).
QSslSocket::supportsSsl();
// Initialize our copy of OpenSSL.
SSL_library_init(); // Safe to discard return value, per OpenSSL man pages.
SSL_load_error_strings();
// Determine if a locking callback has not been set.
// This should be the case if there are multiple copies
// of OpensSSL in the address space. This is mostly due
// to Qt dynamically loading OpenSSL when it is not
// configured with -openssl-linked.
//
// If we detect that no locking callback is configured, we
// have to set it up ourselves to allow multi-threaded use
// of OpenSSL.
if (CRYPTO_get_locking_callback() == NULL) {
SSLLocks::initialize();
}
}
void MumbleSSL::destroy() {
SSLLocks::destroy();
}
QString MumbleSSL::defaultOpenSSLCipherString() {
return QLatin1String("EECDH+AESGCM:EDH+aRSA+AESGCM:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:AES256-SHA:AES128-SHA");
}
QList<QSslCipher> MumbleSSL::ciphersFromOpenSSLCipherString(QString cipherString) {
QList<QSslCipher> chosenCiphers;
SSL_CTX *ctx = NULL;
SSL *ssl = NULL;
const SSL_METHOD *meth = NULL;
int i = 0;
QByteArray csbuf = cipherString.toLatin1();
const char *ciphers = csbuf.constData();
meth = SSLv23_server_method();
if (meth == NULL) {
qWarning("MumbleSSL: unable to get SSL method");
goto out;
}
// We use const_cast to be compatible with OpenSSL 0.9.8.
ctx = SSL_CTX_new(const_cast<SSL_METHOD *>(meth));
if (ctx == NULL) {
qWarning("MumbleSSL: unable to allocate SSL_CTX");
goto out;
}
if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
qWarning("MumbleSSL: error parsing OpenSSL cipher string in ciphersFromOpenSSLCipherString");
goto out;
}
ssl = SSL_new(ctx);
if (ssl == NULL) {
qWarning("MumbleSSL: unable to create SSL object in ciphersFromOpenSSLCipherString");
goto out;
}
while (1) {
const char *name = SSL_get_cipher_list(ssl, i);
if (name == NULL) {
break;
}
#if QT_VERSION >= 0x050300
QSslCipher c = QSslCipher(QString::fromLatin1(name));
if (!c.isNull()) {
chosenCiphers << c;
}
#else
foreach (const QSslCipher &c, QSslSocket::supportedCiphers()) {
if (c.name() == QString::fromLatin1(name)) {
chosenCiphers << c;
}
}
#endif
++i;
}
out:
SSL_CTX_free(ctx);
SSL_free(ssl);
return chosenCiphers;
}
void MumbleSSL::addSystemCA() {
#if QT_VERSION < 0x040700 && !defined(NO_SYSTEM_CA_OVERRIDE)
#if defined(Q_OS_WIN)
QStringList qsl;
qsl << QLatin1String("Ca");
qsl << QLatin1String("Root");
qsl << QLatin1String("AuthRoot");
foreach(const QString &store, qsl) {
HCERTSTORE hCertStore;
PCCERT_CONTEXT pCertContext = NULL;
bool found = false;
hCertStore = CertOpenSystemStore(NULL, store.utf16());
if (! hCertStore) {
qWarning("SSL: Failed to open CA store %s", qPrintable(store));
continue;
}
while (pCertContext = CertEnumCertificatesInStore(hCertStore, pCertContext)) {
QByteArray qba(reinterpret_cast<const char *>(pCertContext->pbCertEncoded), pCertContext->cbCertEncoded);
QList<QSslCertificate> ql = QSslCertificate::fromData(qba, QSsl::Pem);
ql += QSslCertificate::fromData(qba, QSsl::Der);
if (! ql.isEmpty()) {
found = true;
QSslSocket::addDefaultCaCertificates(ql);
}
}
if (found)
qWarning("SSL: Added CA certificates from system store '%s'", qPrintable(store));
CertCloseStore(hCertStore, 0);
}
#elif defined(Q_OS_MAC)
CFArrayRef certs = NULL;
bool found = false;
if (SecTrustCopyAnchorCertificates(&certs) == noErr) {
int ncerts = CFArrayGetCount(certs);
for (int i = 0; i < ncerts; i++) {
CFDataRef data = NULL;
SecCertificateRef cert = reinterpret_cast<SecCertificateRef>(const_cast<void *>(CFArrayGetValueAtIndex(certs, i)));
if (! cert)
continue;
if (SecKeychainItemExport(cert, kSecFormatX509Cert, kSecItemPemArmour, NULL, &data) == noErr) {
const char *ptr = reinterpret_cast<const char *>(CFDataGetBytePtr(data));
int len = CFDataGetLength(data);
QByteArray qba(ptr, len);
QList<QSslCertificate> ql = QSslCertificate::fromData(qba, QSsl::Pem);
if (! ql.isEmpty()) {
found = true;
QSslSocket::addDefaultCaCertificates(ql);
}
}
}
CFRelease(certs);
if (found)
qWarning("SSL: Added CA certificates from 'System Roots' store.");
}
#elif defined(Q_OS_UNIX)
QStringList qsl;
#ifdef SYSTEM_CA_DIR
QSslSocket::addDefaultCaCertificates(QLatin1String(MUMTEXT(SYSTEM_CA_DIR)));
#else
#ifdef SYSTEM_CA_BUNDLE
qsl << QLatin1String(MUMTEXT(SYSTEM_CA_BUNDLE));
#else
#ifdef __FreeBSD__
qsl << QLatin1String("/usr/local/share/certs/ca-root-nss.crt");
#else
qsl << QLatin1String("/etc/pki/tls/certs/ca-bundle.crt");
qsl << QLatin1String("/etc/ssl/certs/ca-certificates.crt");
#endif
#endif
foreach(const QString &filename, qsl) {
QFile f(filename);
if (f.exists() && f.open(QIODevice::ReadOnly)) {
QList<QSslCertificate> ql = QSslCertificate::fromDevice(&f, QSsl::Pem);
ql += QSslCertificate::fromDevice(&f, QSsl::Der);
if (! ql.isEmpty()) {
qWarning("SSL: Added CA certificates from '%s'", qPrintable(filename));
QSslSocket::addDefaultCaCertificates(ql);
}
}
}
#endif // SYSTEM_CA_DIR
#endif // Q_OS_UNIX
QSet<QByteArray> digests;
QList<QSslCertificate> ql;
foreach(const QSslCertificate &crt, QSslSocket::defaultCaCertificates()) {
QByteArray digest = crt.digest(QCryptographicHash::Sha1);
if (! digests.contains(digest) && crt.isValid()) {
ql << crt;
digests.insert(digest);
}
}
QSslSocket::setDefaultCaCertificates(ql);
#endif // NO_SYSTEM_CA_OVERRIDE
// Don't perform on-demand loading of root certificates
#if QT_VERSION >= 0x050500
QSslSocket::addDefaultCaCertificates(QSslConfiguration::systemCaCertificates());
#elif QT_VERSION >= 0x040800
QSslSocket::addDefaultCaCertificates(QSslSocket::systemCaCertificates());
#endif
#ifdef Q_OS_WIN
// Work around issue #1271.
// Skype's click-to-call feature creates an enormous
// amount of certificates in the Root CA store.
{
QSslConfiguration sslCfg = QSslConfiguration::defaultConfiguration();
QList<QSslCertificate> caList = sslCfg.caCertificates();
QList<QSslCertificate> filteredCaList;
foreach (QSslCertificate cert, caList) {
#if QT_VERSION >= 0x050000
QStringList orgs = cert.subjectInfo(QSslCertificate::Organization);
bool skip = false;
foreach (QString ou, orgs) {
if (ou.contains(QLatin1String("Skype"), Qt::CaseInsensitive)) {
skip = true;
break;
}
}
if (skip) {
continue;
}
#else
QString ou = cert.subjectInfo(QSslCertificate::Organization);
if (ou.contains(QLatin1String("Skype"), Qt::CaseInsensitive)) {
continue;
}
#endif
filteredCaList.append(cert);
}
sslCfg.setCaCertificates(filteredCaList);
QSslConfiguration::setDefaultConfiguration(sslCfg);
qWarning("SSL: CA certificate filter applied. Filtered size: %i, original size: %i", filteredCaList.size(), caList.size());
}
#endif
}
QString MumbleSSL::protocolToString(QSsl::SslProtocol protocol) {
switch(protocol) {
case QSsl::SslV3: return QLatin1String("SSL 3");
case QSsl::SslV2: return QLatin1String("SSL 2");
#if QT_VERSION >= 0x050000
case QSsl::TlsV1_0: return QLatin1String("TLS 1.0");
case QSsl::TlsV1_1: return QLatin1String("TLS 1.1");
case QSsl::TlsV1_2: return QLatin1String("TLS 1.2");
#if QT_VERSION >= 0x050C00
case QSsl::TlsV1_3: return QLatin1String("TLS 1.3");
#endif
#else
case QSsl::TlsV1: return QLatin1String("TLS 1.0");
#endif
case QSsl::AnyProtocol: return QLatin1String("AnyProtocol");
#if QT_VERSION >= 0x040800
case QSsl::TlsV1SslV3: return QLatin1String("TlsV1SslV3");
case QSsl::SecureProtocols: return QLatin1String("SecureProtocols");
#endif
default:
case QSsl::UnknownProtocol: return QLatin1String("UnknownProtocol");
}
}
|