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
|
using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Digests;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Crypto.Tls
{
public abstract class DefaultTlsClient
: TlsClient
{
protected TlsCipherFactory cipherFactory;
protected TlsClientContext context;
protected CompressionMethod selectedCompressionMethod;
protected CipherSuite selectedCipherSuite;
public DefaultTlsClient()
: this(new DefaultTlsCipherFactory())
{
}
public DefaultTlsClient(TlsCipherFactory cipherFactory)
{
this.cipherFactory = cipherFactory;
}
public virtual void Init(TlsClientContext context)
{
this.context = context;
}
public virtual CipherSuite[] GetCipherSuites()
{
return new CipherSuite[] {
CipherSuite.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
};
}
public virtual CompressionMethod[] GetCompressionMethods()
{
/*
* To offer DEFLATE compression, override this method:
* return new CompressionMethod[] { CompressionMethod.DEFLATE, CompressionMethod.NULL };
*/
return new CompressionMethod[] { CompressionMethod.NULL };
}
public virtual IDictionary GetClientExtensions()
{
return null;
}
public virtual void NotifySessionID(byte[] sessionID)
{
// Currently ignored
}
public virtual void NotifySelectedCipherSuite(CipherSuite selectedCipherSuite)
{
this.selectedCipherSuite = selectedCipherSuite;
}
public virtual void NotifySelectedCompressionMethod(CompressionMethod selectedCompressionMethod)
{
this.selectedCompressionMethod = selectedCompressionMethod;
}
public virtual void NotifySecureRenegotiation(bool secureRenegotiation)
{
if (!secureRenegotiation)
{
/*
* RFC 5746 3.4.
* If the extension is not present, the server does not support
* secure renegotiation; set secure_renegotiation flag to FALSE.
* In this case, some clients may want to terminate the handshake
* instead of continuing; see Section 4.1 for discussion.
*/
// throw new TlsFatalAlert(AlertDescription.handshake_failure);
}
}
public virtual void ProcessServerExtensions(IDictionary serverExtensions)
{
}
public virtual TlsKeyExchange GetKeyExchange()
{
switch (selectedCipherSuite)
{
case CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA:
return CreateRsaKeyExchange();
case CipherSuite.TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DH_DSS_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DH_DSS_WITH_AES_256_CBC_SHA:
return CreateDHKeyExchange(KeyExchangeAlgorithm.DH_DSS);
case CipherSuite.TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DH_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DH_RSA_WITH_AES_256_CBC_SHA:
return CreateDHKeyExchange(KeyExchangeAlgorithm.DH_RSA);
case CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA:
return CreateDheKeyExchange(KeyExchangeAlgorithm.DHE_DSS);
case CipherSuite.TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
return CreateDheKeyExchange(KeyExchangeAlgorithm.DHE_RSA);
case CipherSuite.TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA:
return CreateECDHKeyExchange(KeyExchangeAlgorithm.ECDH_ECDSA);
case CipherSuite.TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
return CreateECDheKeyExchange(KeyExchangeAlgorithm.ECDHE_ECDSA);
case CipherSuite.TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDH_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDH_RSA_WITH_AES_256_CBC_SHA:
return CreateECDHKeyExchange(KeyExchangeAlgorithm.ECDH_RSA);
case CipherSuite.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
return CreateECDheKeyExchange(KeyExchangeAlgorithm.ECDHE_RSA);
default:
/*
* Note: internal error here; the TlsProtocolHandler verifies that the
* server-selected cipher suite was in the list of client-offered cipher
* suites, so if we now can't produce an implementation, we shouldn't have
* offered it!
*/
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
public abstract TlsAuthentication GetAuthentication();
public virtual TlsCompression GetCompression()
{
switch (selectedCompressionMethod)
{
case CompressionMethod.NULL:
return new TlsNullCompression();
case CompressionMethod.DEFLATE:
return new TlsDeflateCompression();
default:
/*
* Note: internal error here; the TlsProtocolHandler verifies that the
* server-selected compression method was in the list of client-offered compression
* methods, so if we now can't produce an implementation, we shouldn't have
* offered it!
*/
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
public virtual TlsCipher GetCipher()
{
switch (selectedCipherSuite)
{
case CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:
return cipherFactory.CreateCipher(context, EncryptionAlgorithm.cls_3DES_EDE_CBC, DigestAlgorithm.SHA);
case CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DH_DSS_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DH_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDH_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
return cipherFactory.CreateCipher(context, EncryptionAlgorithm.AES_128_CBC, DigestAlgorithm.SHA);
case CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_DH_DSS_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_DH_RSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_ECDH_RSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
return cipherFactory.CreateCipher(context, EncryptionAlgorithm.AES_256_CBC, DigestAlgorithm.SHA);
default:
/*
* Note: internal error here; the TlsProtocolHandler verifies that the
* server-selected cipher suite was in the list of client-offered cipher
* suites, so if we now can't produce an implementation, we shouldn't have
* offered it!
*/
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
protected virtual TlsKeyExchange CreateDHKeyExchange(KeyExchangeAlgorithm keyExchange)
{
return new TlsDHKeyExchange(context, keyExchange);
}
protected virtual TlsKeyExchange CreateDheKeyExchange(KeyExchangeAlgorithm keyExchange)
{
return new TlsDheKeyExchange(context, keyExchange);
}
protected virtual TlsKeyExchange CreateECDHKeyExchange(KeyExchangeAlgorithm keyExchange)
{
return new TlsECDHKeyExchange(context, keyExchange);
}
protected virtual TlsKeyExchange CreateECDheKeyExchange(KeyExchangeAlgorithm keyExchange)
{
return new TlsECDheKeyExchange(context, keyExchange);
}
protected virtual TlsKeyExchange CreateRsaKeyExchange()
{
return new TlsRsaKeyExchange(context);
}
}
}
|
