Coverage Report

Created: 2020-05-23 13:54

/src/botan/src/lib/tls/tls_extensions.cpp
Line
Count
Source (jump to first uncovered line)
1
/*
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* TLS Extensions
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* (C) 2011,2012,2015,2016 Jack Lloyd
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*     2016 Juraj Somorovsky
5
*
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* Botan is released under the Simplified BSD License (see license.txt)
7
*/
8
9
#include <botan/tls_extensions.h>
10
#include <botan/internal/tls_reader.h>
11
#include <botan/tls_exceptn.h>
12
#include <botan/tls_policy.h>
13
14
namespace Botan {
15
16
namespace TLS {
17
18
namespace {
19
20
Extension* make_extension(TLS_Data_Reader& reader, uint16_t code, uint16_t size, Connection_Side from)
21
191k
   {
22
191k
   switch(code)
23
191k
      {
24
6.21k
      case TLSEXT_SERVER_NAME_INDICATION:
25
6.21k
         return new Server_Name_Indicator(reader, size);
26
0
27
0
#if defined(BOTAN_HAS_SRP6)
28
71
      case TLSEXT_SRP_IDENTIFIER:
29
71
         return new SRP_Identifier(reader, size);
30
0
#endif
31
0
32
18.7k
      case TLSEXT_SUPPORTED_GROUPS:
33
18.7k
         return new Supported_Groups(reader, size);
34
0
35
1.29k
      case TLSEXT_CERT_STATUS_REQUEST:
36
1.29k
         return new Certificate_Status_Request(reader, size, from);
37
0
38
1.72k
      case TLSEXT_EC_POINT_FORMATS:
39
1.72k
         return new Supported_Point_Formats(reader, size);
40
0
41
4.10k
      case TLSEXT_SAFE_RENEGOTIATION:
42
4.10k
         return new Renegotiation_Extension(reader, size);
43
0
44
2.75k
      case TLSEXT_SIGNATURE_ALGORITHMS:
45
2.75k
         return new Signature_Algorithms(reader, size);
46
0
47
126
      case TLSEXT_USE_SRTP:
48
126
          return new SRTP_Protection_Profiles(reader, size);
49
0
50
9.25k
      case TLSEXT_ALPN:
51
9.25k
         return new Application_Layer_Protocol_Notification(reader, size);
52
0
53
6.70k
      case TLSEXT_EXTENDED_MASTER_SECRET:
54
6.70k
         return new Extended_Master_Secret(reader, size);
55
0
56
2.99k
      case TLSEXT_ENCRYPT_THEN_MAC:
57
2.99k
         return new Encrypt_then_MAC(reader, size);
58
0
59
2.70k
      case TLSEXT_SESSION_TICKET:
60
2.70k
         return new Session_Ticket(reader, size);
61
0
62
128
      case TLSEXT_SUPPORTED_VERSIONS:
63
128
         return new Supported_Versions(reader, size, from);
64
134k
      }
65
134k
66
134k
   return new Unknown_Extension(static_cast<Handshake_Extension_Type>(code),
67
134k
                                reader, size);
68
134k
   }
69
70
}
71
72
void Extensions::deserialize(TLS_Data_Reader& reader, Connection_Side from)
73
35.9k
   {
74
35.9k
   if(reader.has_remaining())
75
34.6k
      {
76
34.6k
      const uint16_t all_extn_size = reader.get_uint16_t();
77
34.6k
78
34.6k
      if(reader.remaining_bytes() != all_extn_size)
79
141
         throw Decoding_Error("Bad extension size");
80
34.4k
81
226k
      while(reader.has_remaining())
82
191k
         {
83
191k
         const uint16_t extension_code = reader.get_uint16_t();
84
191k
         const uint16_t extension_size = reader.get_uint16_t();
85
191k
86
191k
         const auto type = static_cast<Handshake_Extension_Type>(extension_code);
87
191k
88
191k
         if(m_extensions.find(type) != m_extensions.end())
89
14
            throw TLS_Exception(TLS::Alert::DECODE_ERROR,
90
14
                                "Peer sent duplicated extensions");
91
191k
92
191k
         Extension* extn = make_extension(
93
191k
            reader, extension_code, extension_size, from);
94
191k
95
191k
         this->add(extn);
96
191k
         }
97
34.4k
      }
98
35.9k
   }
99
100
std::vector<uint8_t> Extensions::serialize(Connection_Side whoami) const
101
28.0k
   {
102
28.0k
   std::vector<uint8_t> buf(2); // 2 bytes for length field
103
28.0k
104
28.0k
   for(auto& extn : m_extensions)
105
74.5k
      {
106
74.5k
      if(extn.second->empty())
107
5.24k
         continue;
108
69.3k
109
69.3k
      const uint16_t extn_code = static_cast<uint16_t>(extn.second->type());
110
69.3k
111
69.3k
      const std::vector<uint8_t> extn_val = extn.second->serialize(whoami);
112
69.3k
113
69.3k
      buf.push_back(get_byte(0, extn_code));
114
69.3k
      buf.push_back(get_byte(1, extn_code));
115
69.3k
116
69.3k
      buf.push_back(get_byte(0, static_cast<uint16_t>(extn_val.size())));
117
69.3k
      buf.push_back(get_byte(1, static_cast<uint16_t>(extn_val.size())));
118
69.3k
119
69.3k
      buf += extn_val;
120
69.3k
      }
121
28.0k
122
28.0k
   const uint16_t extn_size = static_cast<uint16_t>(buf.size() - 2);
123
28.0k
124
28.0k
   buf[0] = get_byte(0, extn_size);
125
28.0k
   buf[1] = get_byte(1, extn_size);
126
28.0k
127
28.0k
   // avoid sending a completely empty extensions block
128
28.0k
   if(buf.size() == 2)
129
11.5k
      return std::vector<uint8_t>();
130
16.4k
131
16.4k
   return buf;
132
16.4k
   }
133
134
bool Extensions::remove_extension(Handshake_Extension_Type typ)
135
0
   {
136
0
   auto i = m_extensions.find(typ);
137
0
   if(i == m_extensions.end())
138
0
      return false;
139
0
   m_extensions.erase(i);
140
0
   return true;
141
0
   }
142
143
std::set<Handshake_Extension_Type> Extensions::extension_types() const
144
24.1k
   {
145
24.1k
   std::set<Handshake_Extension_Type> offers;
146
205k
   for(auto i = m_extensions.begin(); i != m_extensions.end(); ++i)
147
180k
      offers.insert(i->first);
148
24.1k
   return offers;
149
24.1k
   }
150
151
Unknown_Extension::Unknown_Extension(Handshake_Extension_Type type,
152
                                     TLS_Data_Reader& reader,
153
                                     uint16_t extension_size) :
154
   m_type(type),
155
   m_value(reader.get_fixed<uint8_t>(extension_size))
156
134k
   {
157
134k
   }
158
159
std::vector<uint8_t> Unknown_Extension::serialize(Connection_Side /*whoami*/) const
160
0
   {
161
0
   throw Invalid_State("Cannot encode an unknown TLS extension");
162
0
   }
163
164
Server_Name_Indicator::Server_Name_Indicator(TLS_Data_Reader& reader,
165
                                             uint16_t extension_size)
166
6.21k
   {
167
6.21k
   /*
168
6.21k
   * This is used by the server to confirm that it knew the name
169
6.21k
   */
170
6.21k
   if(extension_size == 0)
171
5.90k
      return;
172
315
173
315
   uint16_t name_bytes = reader.get_uint16_t();
174
315
175
315
   if(name_bytes + 2 != extension_size)
176
78
      throw Decoding_Error("Bad encoding of SNI extension");
177
237
178
1.10k
   while(name_bytes)
179
871
      {
180
871
      uint8_t name_type = reader.get_byte();
181
871
      name_bytes--;
182
871
183
871
      if(name_type == 0) // DNS
184
685
         {
185
685
         m_sni_host_name = reader.get_string(2, 1, 65535);
186
685
         name_bytes -= static_cast<uint16_t>(2 + m_sni_host_name.size());
187
685
         }
188
186
      else // some other unknown name type
189
186
         {
190
186
         reader.discard_next(name_bytes);
191
186
         name_bytes = 0;
192
186
         }
193
871
      }
194
237
   }
195
196
std::vector<uint8_t> Server_Name_Indicator::serialize(Connection_Side /*whoami*/) const
197
5.24k
   {
198
5.24k
   std::vector<uint8_t> buf;
199
5.24k
200
5.24k
   size_t name_len = m_sni_host_name.size();
201
5.24k
202
5.24k
   buf.push_back(get_byte(0, static_cast<uint16_t>(name_len+3)));
203
5.24k
   buf.push_back(get_byte(1, static_cast<uint16_t>(name_len+3)));
204
5.24k
   buf.push_back(0); // DNS
205
5.24k
206
5.24k
   buf.push_back(get_byte(0, static_cast<uint16_t>(name_len)));
207
5.24k
   buf.push_back(get_byte(1, static_cast<uint16_t>(name_len)));
208
5.24k
209
5.24k
   buf += std::make_pair(
210
5.24k
      cast_char_ptr_to_uint8(m_sni_host_name.data()),
211
5.24k
      m_sni_host_name.size());
212
5.24k
213
5.24k
   return buf;
214
5.24k
   }
215
216
#if defined(BOTAN_HAS_SRP6)
217
218
SRP_Identifier::SRP_Identifier(TLS_Data_Reader& reader,
219
                               uint16_t extension_size) : m_srp_identifier(reader.get_string(1, 1, 255))
220
71
   {
221
71
   if(m_srp_identifier.size() + 1 != extension_size)
222
33
      throw Decoding_Error("Bad encoding for SRP identifier extension");
223
71
   }
224
225
std::vector<uint8_t> SRP_Identifier::serialize(Connection_Side /*whoami*/) const
226
0
   {
227
0
   std::vector<uint8_t> buf;
228
0
229
0
   const uint8_t* srp_bytes = cast_char_ptr_to_uint8(m_srp_identifier.data());
230
0
   append_tls_length_value(buf, srp_bytes, m_srp_identifier.size(), 1);
231
0
232
0
   return buf;
233
0
   }
234
235
#endif
236
237
Renegotiation_Extension::Renegotiation_Extension(TLS_Data_Reader& reader,
238
                                                 uint16_t extension_size) : m_reneg_data(reader.get_range<uint8_t>(1, 0, 255))
239
4.10k
   {
240
4.10k
   if(m_reneg_data.size() + 1 != extension_size)
241
49
      throw Decoding_Error("Bad encoding for secure renegotiation extn");
242
4.10k
   }
243
244
std::vector<uint8_t> Renegotiation_Extension::serialize(Connection_Side /*whoami*/) const
245
10.1k
   {
246
10.1k
   std::vector<uint8_t> buf;
247
10.1k
   append_tls_length_value(buf, m_reneg_data, 1);
248
10.1k
   return buf;
249
10.1k
   }
250
251
Application_Layer_Protocol_Notification::Application_Layer_Protocol_Notification(TLS_Data_Reader& reader,
252
                                                                                 uint16_t extension_size)
253
9.25k
   {
254
9.25k
   if(extension_size == 0)
255
5.21k
      return; // empty extension
256
4.03k
257
4.03k
   const uint16_t name_bytes = reader.get_uint16_t();
258
4.03k
259
4.03k
   size_t bytes_remaining = extension_size - 2;
260
4.03k
261
4.03k
   if(name_bytes != bytes_remaining)
262
115
      throw Decoding_Error("Bad encoding of ALPN extension, bad length field");
263
3.92k
264
33.9k
   while(bytes_remaining)
265
30.0k
      {
266
30.0k
      const std::string p = reader.get_string(1, 0, 255);
267
30.0k
268
30.0k
      if(bytes_remaining < p.size() + 1)
269
3
         throw Decoding_Error("Bad encoding of ALPN, length field too long");
270
30.0k
271
30.0k
      if(p.empty())
272
88
         throw Decoding_Error("Empty ALPN protocol not allowed");
273
30.0k
274
30.0k
      bytes_remaining -= (p.size() + 1);
275
30.0k
276
30.0k
      m_protocols.push_back(p);
277
30.0k
      }
278
3.92k
   }
279
280
const std::string& Application_Layer_Protocol_Notification::single_protocol() const
281
0
   {
282
0
   if(m_protocols.size() != 1)
283
0
      throw TLS_Exception(Alert::HANDSHAKE_FAILURE,
284
0
                          "Server sent " + std::to_string(m_protocols.size()) +
285
0
                          " protocols in ALPN extension response");
286
0
   return m_protocols[0];
287
0
   }
288
289
std::vector<uint8_t> Application_Layer_Protocol_Notification::serialize(Connection_Side /*whoami*/) const
290
5.13k
   {
291
5.13k
   std::vector<uint8_t> buf(2);
292
5.13k
293
5.13k
   for(auto&& p: m_protocols)
294
5.13k
      {
295
5.13k
      if(p.length() >= 256)
296
0
         throw TLS_Exception(Alert::INTERNAL_ERROR, "ALPN name too long");
297
5.13k
      if(p != "")
298
5.13k
         append_tls_length_value(buf,
299
5.13k
                                 cast_char_ptr_to_uint8(p.data()),
300
5.13k
                                 p.size(),
301
5.13k
                                 1);
302
5.13k
      }
303
5.13k
304
5.13k
   buf[0] = get_byte(0, static_cast<uint16_t>(buf.size()-2));
305
5.13k
   buf[1] = get_byte(1, static_cast<uint16_t>(buf.size()-2));
306
5.13k
307
5.13k
   return buf;
308
5.13k
   }
309
310
Supported_Groups::Supported_Groups(const std::vector<Group_Params>& groups) : m_groups(groups)
311
5.24k
   {
312
5.24k
   }
313
314
std::vector<Group_Params> Supported_Groups::ec_groups() const
315
39.8k
   {
316
39.8k
   std::vector<Group_Params> ec;
317
39.8k
   for(auto g : m_groups)
318
203k
      {
319
203k
      if(group_param_is_dh(g) == false)
320
155k
         ec.push_back(g);
321
203k
      }
322
39.8k
   return ec;
323
39.8k
   }
324
325
std::vector<Group_Params> Supported_Groups::dh_groups() const
326
1.82k
   {
327
1.82k
   std::vector<Group_Params> dh;
328
1.82k
   for(auto g : m_groups)
329
8.08k
      {
330
8.08k
      if(group_param_is_dh(g) == true)
331
3.03k
         dh.push_back(g);
332
8.08k
      }
333
1.82k
   return dh;
334
1.82k
   }
335
336
std::vector<uint8_t> Supported_Groups::serialize(Connection_Side /*whoami*/) const
337
5.24k
   {
338
5.24k
   std::vector<uint8_t> buf(2);
339
5.24k
340
5.24k
   for(auto g : m_groups)
341
62.8k
      {
342
62.8k
      const uint16_t id = static_cast<uint16_t>(g);
343
62.8k
344
62.8k
      if(id > 0)
345
62.8k
         {
346
62.8k
         buf.push_back(get_byte(0, id));
347
62.8k
         buf.push_back(get_byte(1, id));
348
62.8k
         }
349
62.8k
      }
350
5.24k
351
5.24k
   buf[0] = get_byte(0, static_cast<uint16_t>(buf.size()-2));
352
5.24k
   buf[1] = get_byte(1, static_cast<uint16_t>(buf.size()-2));
353
5.24k
354
5.24k
   return buf;
355
5.24k
   }
356
357
Supported_Groups::Supported_Groups(TLS_Data_Reader& reader,
358
                                   uint16_t extension_size)
359
18.7k
   {
360
18.7k
   const uint16_t len = reader.get_uint16_t();
361
18.7k
362
18.7k
   if(len + 2 != extension_size)
363
59
      throw Decoding_Error("Inconsistent length field in supported groups list");
364
18.6k
365
18.6k
   if(len % 2 == 1)
366
3
      throw Decoding_Error("Supported groups list of strange size");
367
18.6k
368
18.6k
   const size_t elems = len / 2;
369
18.6k
370
110k
   for(size_t i = 0; i != elems; ++i)
371
92.0k
      {
372
92.0k
      const uint16_t id = reader.get_uint16_t();
373
92.0k
      m_groups.push_back(static_cast<Group_Params>(id));
374
92.0k
      }
375
18.6k
   }
376
377
std::vector<uint8_t> Supported_Point_Formats::serialize(Connection_Side /*whoami*/) const
378
5.81k
   {
379
5.81k
   // if this extension is sent, it MUST include uncompressed (RFC 4492, section 5.1)
380
5.81k
   if(m_prefers_compressed)
381
0
      {
382
0
      return std::vector<uint8_t>{2, ANSIX962_COMPRESSED_PRIME, UNCOMPRESSED};
383
0
      }
384
5.81k
   else
385
5.81k
      {
386
5.81k
      return std::vector<uint8_t>{1, UNCOMPRESSED};
387
5.81k
      }
388
5.81k
   }
389
390
Supported_Point_Formats::Supported_Point_Formats(TLS_Data_Reader& reader,
391
                                                 uint16_t extension_size)
392
1.72k
   {
393
1.72k
   uint8_t len = reader.get_byte();
394
1.72k
395
1.72k
   if(len + 1 != extension_size)
396
60
      throw Decoding_Error("Inconsistent length field in supported point formats list");
397
1.66k
398
4.42k
   for(size_t i = 0; i != len; ++i)
399
3.52k
      {
400
3.52k
      uint8_t format = reader.get_byte();
401
3.52k
402
3.52k
      if(static_cast<ECPointFormat>(format) == UNCOMPRESSED)
403
638
         {
404
638
         m_prefers_compressed = false;
405
638
         reader.discard_next(len-i-1);
406
638
         return;
407
638
         }
408
2.88k
      else if(static_cast<ECPointFormat>(format) == ANSIX962_COMPRESSED_PRIME)
409
125
         {
410
125
         m_prefers_compressed = true;
411
125
         reader.discard_next(len-i-1);
412
125
         return;
413
125
         }
414
3.52k
415
3.52k
      // ignore ANSIX962_COMPRESSED_CHAR2, we don't support these curves
416
3.52k
      }
417
1.66k
   }
418
419
std::vector<uint8_t> Signature_Algorithms::serialize(Connection_Side /*whoami*/) const
420
5.24k
   {
421
5.24k
   BOTAN_ASSERT(m_schemes.size() < 256, "Too many signature schemes");
422
5.24k
423
5.24k
   std::vector<uint8_t> buf;
424
5.24k
425
5.24k
   const uint16_t len = static_cast<uint16_t>(m_schemes.size() * 2);
426
5.24k
427
5.24k
   buf.push_back(get_byte(0, len));
428
5.24k
   buf.push_back(get_byte(1, len));
429
5.24k
430
5.24k
   for(Signature_Scheme scheme : m_schemes)
431
47.1k
      {
432
47.1k
      const uint16_t scheme_code = static_cast<uint16_t>(scheme);
433
47.1k
434
47.1k
      buf.push_back(get_byte(0, scheme_code));
435
47.1k
      buf.push_back(get_byte(1, scheme_code));
436
47.1k
      }
437
5.24k
438
5.24k
   return buf;
439
5.24k
   }
440
441
Signature_Algorithms::Signature_Algorithms(TLS_Data_Reader& reader,
442
                                           uint16_t extension_size)
443
2.75k
   {
444
2.75k
   uint16_t len = reader.get_uint16_t();
445
2.75k
446
2.75k
   if(len + 2 != extension_size || len % 2 == 1 || len == 0)
447
73
      {
448
73
      throw Decoding_Error("Bad encoding on signature algorithms extension");
449
73
      }
450
2.68k
451
44.8k
   while(len)
452
42.1k
      {
453
42.1k
      const uint16_t scheme_code = reader.get_uint16_t();
454
42.1k
      m_schemes.push_back(static_cast<Signature_Scheme>(scheme_code));
455
42.1k
      len -= 2;
456
42.1k
      }
457
2.68k
   }
458
459
Session_Ticket::Session_Ticket(TLS_Data_Reader& reader,
460
                               uint16_t extension_size) : m_ticket(reader.get_elem<uint8_t, std::vector<uint8_t>>(extension_size))
461
2.70k
   {}
462
463
SRTP_Protection_Profiles::SRTP_Protection_Profiles(TLS_Data_Reader& reader,
464
                                                   uint16_t extension_size) : m_pp(reader.get_range<uint16_t>(2, 0, 65535))
465
126
   {
466
126
   const std::vector<uint8_t> mki = reader.get_range<uint8_t>(1, 0, 255);
467
126
468
126
   if(m_pp.size() * 2 + mki.size() + 3 != extension_size)
469
74
      throw Decoding_Error("Bad encoding for SRTP protection extension");
470
52
471
52
   if(!mki.empty())
472
3
      throw Decoding_Error("Unhandled non-empty MKI for SRTP protection extension");
473
52
   }
474
475
std::vector<uint8_t> SRTP_Protection_Profiles::serialize(Connection_Side /*whoami*/) const
476
0
   {
477
0
   std::vector<uint8_t> buf;
478
0
479
0
   const uint16_t pp_len = static_cast<uint16_t>(m_pp.size() * 2);
480
0
   buf.push_back(get_byte(0, pp_len));
481
0
   buf.push_back(get_byte(1, pp_len));
482
0
483
0
   for(uint16_t pp : m_pp)
484
0
      {
485
0
      buf.push_back(get_byte(0, pp));
486
0
      buf.push_back(get_byte(1, pp));
487
0
      }
488
0
489
0
   buf.push_back(0); // srtp_mki, always empty here
490
0
491
0
   return buf;
492
0
   }
493
494
Extended_Master_Secret::Extended_Master_Secret(TLS_Data_Reader&,
495
                                               uint16_t extension_size)
496
6.70k
   {
497
6.70k
   if(extension_size != 0)
498
44
      throw Decoding_Error("Invalid extended_master_secret extension");
499
6.70k
   }
500
501
std::vector<uint8_t> Extended_Master_Secret::serialize(Connection_Side /*whoami*/) const
502
9.55k
   {
503
9.55k
   return std::vector<uint8_t>();
504
9.55k
   }
505
506
Encrypt_then_MAC::Encrypt_then_MAC(TLS_Data_Reader&,
507
                                   uint16_t extension_size)
508
2.99k
   {
509
2.99k
   if(extension_size != 0)
510
41
      throw Decoding_Error("Invalid encrypt_then_mac extension");
511
2.99k
   }
512
513
std::vector<uint8_t> Encrypt_then_MAC::serialize(Connection_Side /*whoami*/) const
514
5.53k
   {
515
5.53k
   return std::vector<uint8_t>();
516
5.53k
   }
517
518
std::vector<uint8_t> Certificate_Status_Request::serialize(Connection_Side whoami) const
519
6.16k
   {
520
6.16k
   std::vector<uint8_t> buf;
521
6.16k
522
6.16k
   if(whoami == Connection_Side::SERVER)
523
923
      return buf; // server reply is empty
524
5.24k
525
5.24k
   /*
526
5.24k
   opaque ResponderID<1..2^16-1>;
527
5.24k
   opaque Extensions<0..2^16-1>;
528
5.24k
529
5.24k
   CertificateStatusType status_type = ocsp(1)
530
5.24k
   ResponderID responder_id_list<0..2^16-1>
531
5.24k
   Extensions  request_extensions;
532
5.24k
   */
533
5.24k
534
5.24k
   buf.push_back(1); // CertificateStatusType ocsp
535
5.24k
536
5.24k
   buf.push_back(0);
537
5.24k
   buf.push_back(0);
538
5.24k
   buf.push_back(0);
539
5.24k
   buf.push_back(0);
540
5.24k
541
5.24k
   return buf;
542
5.24k
   }
543
544
Certificate_Status_Request::Certificate_Status_Request(TLS_Data_Reader& reader,
545
                                                       uint16_t extension_size,
546
                                                       Connection_Side from)
547
1.29k
   {
548
1.29k
   if(from == Connection_Side::SERVER)
549
223
      {
550
223
      if(extension_size != 0)
551
14
         throw Decoding_Error("Server sent non-empty Certificate_Status_Request extension");
552
1.06k
      }
553
1.06k
   else if(extension_size > 0)
554
127
      {
555
127
      const uint8_t type = reader.get_byte();
556
127
      if(type == 1)
557
12
         {
558
12
         const size_t len_resp_id_list = reader.get_uint16_t();
559
12
         m_ocsp_names = reader.get_fixed<uint8_t>(len_resp_id_list);
560
12
         const size_t len_requ_ext = reader.get_uint16_t();
561
12
         m_extension_bytes = reader.get_fixed<uint8_t>(len_requ_ext);
562
12
         }
563
115
      else
564
115
         {
565
115
         reader.discard_next(extension_size - 1);
566
115
         }
567
127
      }
568
1.29k
   }
569
570
Certificate_Status_Request::Certificate_Status_Request(const std::vector<uint8_t>& ocsp_responder_ids,
571
                                                       const std::vector<std::vector<uint8_t>>& ocsp_key_ids) :
572
   m_ocsp_names(ocsp_responder_ids),
573
   m_ocsp_keys(ocsp_key_ids)
574
5.24k
   {
575
5.24k
   }
576
577
std::vector<uint8_t> Supported_Versions::serialize(Connection_Side whoami) const
578
5.24k
   {
579
5.24k
   std::vector<uint8_t> buf;
580
5.24k
581
5.24k
   if(whoami == Connection_Side::SERVER)
582
0
      {
583
0
      BOTAN_ASSERT_NOMSG(m_versions.size() == 1);
584
0
      buf.push_back(m_versions[0].major_version());
585
0
      buf.push_back(m_versions[0].minor_version());
586
0
      }
587
5.24k
   else
588
5.24k
      {
589
5.24k
      BOTAN_ASSERT_NOMSG(m_versions.size() >= 1);
590
5.24k
      const uint8_t len = static_cast<uint8_t>(m_versions.size() * 2);
591
5.24k
592
5.24k
      buf.push_back(len);
593
5.24k
594
5.24k
      for(Protocol_Version version : m_versions)
595
5.24k
         {
596
5.24k
         buf.push_back(get_byte(0, version.major_version()));
597
5.24k
         buf.push_back(get_byte(1, version.minor_version()));
598
5.24k
         }
599
5.24k
      }
600
5.24k
601
5.24k
   return buf;
602
5.24k
   }
603
604
Supported_Versions::Supported_Versions(Protocol_Version offer, const Policy& policy)
605
5.24k
   {
606
5.24k
   if(offer.is_datagram_protocol())
607
0
      {
608
0
      if(offer >= Protocol_Version::DTLS_V12 && policy.allow_dtls12())
609
0
         m_versions.push_back(Protocol_Version::DTLS_V12);
610
0
#if defined(BOTAN_HAS_TLS_V10)
611
0
      if(offer >= Protocol_Version::DTLS_V10 && policy.allow_dtls10())
612
0
         m_versions.push_back(Protocol_Version::DTLS_V10);
613
0
#endif
614
0
      }
615
5.24k
   else
616
5.24k
      {
617
5.24k
      if(offer >= Protocol_Version::TLS_V12 && policy.allow_tls12())
618
5.24k
         m_versions.push_back(Protocol_Version::TLS_V12);
619
5.24k
#if defined(BOTAN_HAS_TLS_V10)
620
5.24k
      if(offer >= Protocol_Version::TLS_V11 && policy.allow_tls11())
621
0
         m_versions.push_back(Protocol_Version::TLS_V11);
622
5.24k
      if(offer >= Protocol_Version::TLS_V10 && policy.allow_tls10())
623
0
         m_versions.push_back(Protocol_Version::TLS_V10);
624
5.24k
#endif
625
5.24k
      }
626
5.24k
   }
627
628
Supported_Versions::Supported_Versions(TLS_Data_Reader& reader,
629
                                       uint16_t extension_size,
630
                                       Connection_Side from)
631
128
   {
632
128
   if(from == Connection_Side::SERVER)
633
28
      {
634
28
      if(extension_size != 2)
635
14
         throw Decoding_Error("Server sent invalid supported_versions extension");
636
14
      m_versions.push_back(Protocol_Version(reader.get_uint16_t()));
637
14
      }
638
100
   else
639
100
      {
640
100
      auto versions = reader.get_range<uint16_t>(1, 1, 127);
641
100
642
100
      for(auto v : versions)
643
3.98k
         m_versions.push_back(Protocol_Version(v));
644
100
645
100
      if(extension_size != 1+2*versions.size())
646
73
         throw Decoding_Error("Client sent invalid supported_versions extension");
647
100
      }
648
128
   }
649
650
bool Supported_Versions::supports(Protocol_Version version) const
651
0
   {
652
0
   for(auto v : m_versions)
653
0
      if(version == v)
654
0
         return true;
655
0
   return false;
656
0
   }
657
658
}
659
660
}