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Side by Side Diff: net/quic/crypto/cert_compressor.cc

Issue 266243004: Clang format slam. Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 7 months ago
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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "net/quic/crypto/cert_compressor.h" 5 #include "net/quic/crypto/cert_compressor.h"
6 6
7 #include "base/logging.h" 7 #include "base/logging.h"
8 #include "base/memory/scoped_ptr.h" 8 #include "base/memory/scoped_ptr.h"
9 #include "net/quic/quic_utils.h" 9 #include "net/quic/quic_utils.h"
10 #include "third_party/zlib/zlib.h" 10 #include "third_party/zlib/zlib.h"
11 11
12 using base::StringPiece; 12 using base::StringPiece;
13 using std::string; 13 using std::string;
14 using std::vector; 14 using std::vector;
15 15
16 namespace net { 16 namespace net {
17 17
18 namespace { 18 namespace {
19 19
20 // kCommonCertSubstrings contains ~1500 bytes of common certificate substrings 20 // kCommonCertSubstrings contains ~1500 bytes of common certificate substrings
21 // in order to help zlib. This was generated via a fairly dumb algorithm from 21 // in order to help zlib. This was generated via a fairly dumb algorithm from
22 // the Alexa Top 5000 set - we could probably do better. 22 // the Alexa Top 5000 set - we could probably do better.
23 static const unsigned char kCommonCertSubstrings[] = { 23 static const unsigned char kCommonCertSubstrings[] = {
24 0x04, 0x02, 0x30, 0x00, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x25, 0x04, 24 0x04, 0x02, 0x30, 0x00, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x25, 0x04,
25 0x16, 0x30, 0x14, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x03, 25 0x16, 0x30, 0x14, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x03,
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148 }; 148 };
149 149
150 // CertEntry represents a certificate in compressed form. Each entry is one of 150 // CertEntry represents a certificate in compressed form. Each entry is one of
151 // the three types enumerated in |Type|. 151 // the three types enumerated in |Type|.
152 struct CertEntry { 152 struct CertEntry {
153 public: 153 public:
154 enum Type { 154 enum Type {
155 // Type 0 is reserved to mean "end of list" in the wire format. 155 // Type 0 is reserved to mean "end of list" in the wire format.
156 156
157 // COMPRESSED means that the certificate is included in the trailing zlib 157 // COMPRESSED means that the certificate is included in the trailing zlib
(...skipping 21 matching lines...) Expand all
179 StringPiece client_common_set_hashes, 179 StringPiece client_common_set_hashes,
180 StringPiece client_cached_cert_hashes, 180 StringPiece client_cached_cert_hashes,
181 const CommonCertSets* common_sets) { 181 const CommonCertSets* common_sets) {
182 vector<CertEntry> entries; 182 vector<CertEntry> entries;
183 entries.reserve(certs.size()); 183 entries.reserve(certs.size());
184 184
185 const bool cached_valid = 185 const bool cached_valid =
186 client_cached_cert_hashes.size() % sizeof(uint64) == 0 && 186 client_cached_cert_hashes.size() % sizeof(uint64) == 0 &&
187 !client_cached_cert_hashes.empty(); 187 !client_cached_cert_hashes.empty();
188 188
189 for (vector<string>::const_iterator i = certs.begin(); 189 for (vector<string>::const_iterator i = certs.begin(); i != certs.end();
190 i != certs.end(); ++i) { 190 ++i) {
191 CertEntry entry; 191 CertEntry entry;
192 192
193 if (cached_valid) { 193 if (cached_valid) {
194 bool cached = false; 194 bool cached = false;
195 195
196 uint64 hash = QuicUtils::FNV1a_64_Hash(i->data(), i->size()); 196 uint64 hash = QuicUtils::FNV1a_64_Hash(i->data(), i->size());
197 // This assumes that the machine is little-endian. 197 // This assumes that the machine is little-endian.
198 for (size_t i = 0; i < client_cached_cert_hashes.size(); 198 for (size_t i = 0; i < client_cached_cert_hashes.size();
199 i += sizeof(uint64)) { 199 i += sizeof(uint64)) {
200 uint64 cached_hash; 200 uint64 cached_hash;
201 memcpy(&cached_hash, client_cached_cert_hashes.data() + i, 201 memcpy(
202 sizeof(uint64)); 202 &cached_hash, client_cached_cert_hashes.data() + i, sizeof(uint64));
203 if (hash != cached_hash) { 203 if (hash != cached_hash) {
204 continue; 204 continue;
205 } 205 }
206 206
207 entry.type = CertEntry::CACHED; 207 entry.type = CertEntry::CACHED;
208 entry.hash = hash; 208 entry.hash = hash;
209 entries.push_back(entry); 209 entries.push_back(entry);
210 cached = true; 210 cached = true;
211 break; 211 break;
212 } 212 }
213 213
214 if (cached) { 214 if (cached) {
215 continue; 215 continue;
216 } 216 }
217 } 217 }
218 218
219 if (common_sets && common_sets->MatchCert(*i, client_common_set_hashes, 219 if (common_sets &&
220 &entry.set_hash, &entry.index)) { 220 common_sets->MatchCert(
221 *i, client_common_set_hashes, &entry.set_hash, &entry.index)) {
221 entry.type = CertEntry::COMMON; 222 entry.type = CertEntry::COMMON;
222 entries.push_back(entry); 223 entries.push_back(entry);
223 continue; 224 continue;
224 } 225 }
225 226
226 entry.type = CertEntry::COMPRESSED; 227 entry.type = CertEntry::COMPRESSED;
227 entries.push_back(entry); 228 entries.push_back(entry);
228 } 229 }
229 230
230 return entries; 231 return entries;
231 } 232 }
232 233
233 // CertEntriesSize returns the size, in bytes, of the serialised form of 234 // CertEntriesSize returns the size, in bytes, of the serialised form of
234 // |entries|. 235 // |entries|.
235 size_t CertEntriesSize(const vector<CertEntry>& entries) { 236 size_t CertEntriesSize(const vector<CertEntry>& entries) {
236 size_t entries_size = 0; 237 size_t entries_size = 0;
237 238
238 for (vector<CertEntry>::const_iterator i = entries.begin(); 239 for (vector<CertEntry>::const_iterator i = entries.begin();
239 i != entries.end(); ++i) { 240 i != entries.end();
241 ++i) {
240 entries_size++; 242 entries_size++;
241 switch (i->type) { 243 switch (i->type) {
242 case CertEntry::COMPRESSED: 244 case CertEntry::COMPRESSED:
243 break; 245 break;
244 case CertEntry::CACHED: 246 case CertEntry::CACHED:
245 entries_size += sizeof(uint64); 247 entries_size += sizeof(uint64);
246 break; 248 break;
247 case CertEntry::COMMON: 249 case CertEntry::COMMON:
248 entries_size += sizeof(uint64) + sizeof(uint32); 250 entries_size += sizeof(uint64) + sizeof(uint32);
249 break; 251 break;
250 } 252 }
251 } 253 }
252 254
253 entries_size++; // for end marker 255 entries_size++; // for end marker
254 256
255 return entries_size; 257 return entries_size;
256 } 258 }
257 259
258 // SerializeCertEntries serialises |entries| to |out|, which must have enough 260 // SerializeCertEntries serialises |entries| to |out|, which must have enough
259 // space to contain them. 261 // space to contain them.
260 void SerializeCertEntries(uint8* out, const vector<CertEntry>& entries) { 262 void SerializeCertEntries(uint8* out, const vector<CertEntry>& entries) {
261 for (vector<CertEntry>::const_iterator i = entries.begin(); 263 for (vector<CertEntry>::const_iterator i = entries.begin();
262 i != entries.end(); ++i) { 264 i != entries.end();
265 ++i) {
263 *out++ = i->type; 266 *out++ = i->type;
264 switch (i->type) { 267 switch (i->type) {
265 case CertEntry::COMPRESSED: 268 case CertEntry::COMPRESSED:
266 break; 269 break;
267 case CertEntry::CACHED: 270 case CertEntry::CACHED:
268 memcpy(out, &i->hash, sizeof(i->hash)); 271 memcpy(out, &i->hash, sizeof(i->hash));
269 out += sizeof(uint64); 272 out += sizeof(uint64);
270 break; 273 break;
271 case CertEntry::COMMON: 274 case CertEntry::COMMON:
272 // Assumes a little-endian machine. 275 // Assumes a little-endian machine.
(...skipping 41 matching lines...) Expand 10 before | Expand all | Expand 10 after
314 DCHECK_EQ(zlib_dict.size(), zlib_dict_size); 317 DCHECK_EQ(zlib_dict.size(), zlib_dict_size);
315 318
316 return zlib_dict; 319 return zlib_dict;
317 } 320 }
318 321
319 // HashCerts returns the FNV-1a hashes of |certs|. 322 // HashCerts returns the FNV-1a hashes of |certs|.
320 vector<uint64> HashCerts(const vector<string>& certs) { 323 vector<uint64> HashCerts(const vector<string>& certs) {
321 vector<uint64> ret; 324 vector<uint64> ret;
322 ret.reserve(certs.size()); 325 ret.reserve(certs.size());
323 326
324 for (vector<string>::const_iterator i = certs.begin(); 327 for (vector<string>::const_iterator i = certs.begin(); i != certs.end();
325 i != certs.end(); ++i) { 328 ++i) {
326 ret.push_back(QuicUtils::FNV1a_64_Hash(i->data(), i->size())); 329 ret.push_back(QuicUtils::FNV1a_64_Hash(i->data(), i->size()));
327 } 330 }
328 331
329 return ret; 332 return ret;
330 } 333 }
331 334
332 // ParseEntries parses the serialised form of a vector of CertEntries from 335 // ParseEntries parses the serialised form of a vector of CertEntries from
333 // |in_out| and writes them to |out_entries|. CACHED and COMMON entries are 336 // |in_out| and writes them to |out_entries|. CACHED and COMMON entries are
334 // resolved using |cached_certs| and |common_sets| and written to |out_certs|. 337 // resolved using |cached_certs| and |common_sets| and written to |out_certs|.
335 // |in_out| is updated to contain the trailing data. 338 // |in_out| is updated to contain the trailing data.
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422 DEFLATE, 425 DEFLATE,
423 }; 426 };
424 427
425 explicit ScopedZLib(Type type) : z_(NULL), type_(type) {} 428 explicit ScopedZLib(Type type) : z_(NULL), type_(type) {}
426 429
427 void reset(z_stream* z) { 430 void reset(z_stream* z) {
428 Clear(); 431 Clear();
429 z_ = z; 432 z_ = z;
430 } 433 }
431 434
432 ~ScopedZLib() { 435 ~ScopedZLib() { Clear(); }
433 Clear();
434 }
435 436
436 private: 437 private:
437 void Clear() { 438 void Clear() {
438 if (!z_) { 439 if (!z_) {
439 return; 440 return;
440 } 441 }
441 442
442 if (type_ == DEFLATE) { 443 if (type_ == DEFLATE) {
443 deflateEnd(z_); 444 deflateEnd(z_);
444 } else { 445 } else {
445 inflateEnd(z_); 446 inflateEnd(z_);
446 } 447 }
447 z_ = NULL; 448 z_ = NULL;
448 } 449 }
449 450
450 z_stream* z_; 451 z_stream* z_;
451 const Type type_; 452 const Type type_;
452 }; 453 };
453 454
454 } // anonymous namespace 455 } // anonymous namespace
455 456
456
457 // static 457 // static
458 string CertCompressor::CompressChain(const vector<string>& certs, 458 string CertCompressor::CompressChain(const vector<string>& certs,
459 StringPiece client_common_set_hashes, 459 StringPiece client_common_set_hashes,
460 StringPiece client_cached_cert_hashes, 460 StringPiece client_cached_cert_hashes,
461 const CommonCertSets* common_sets) { 461 const CommonCertSets* common_sets) {
462 const vector<CertEntry> entries = MatchCerts( 462 const vector<CertEntry> entries = MatchCerts(
463 certs, client_common_set_hashes, client_cached_cert_hashes, common_sets); 463 certs, client_common_set_hashes, client_cached_cert_hashes, common_sets);
464 DCHECK_EQ(entries.size(), certs.size()); 464 DCHECK_EQ(entries.size(), certs.size());
465 465
466 size_t uncompressed_size = 0; 466 size_t uncompressed_size = 0;
(...skipping 11 matching lines...) Expand all
478 memset(&z, 0, sizeof(z)); 478 memset(&z, 0, sizeof(z));
479 int rv = deflateInit(&z, Z_DEFAULT_COMPRESSION); 479 int rv = deflateInit(&z, Z_DEFAULT_COMPRESSION);
480 DCHECK_EQ(Z_OK, rv); 480 DCHECK_EQ(Z_OK, rv);
481 if (rv != Z_OK) { 481 if (rv != Z_OK) {
482 return ""; 482 return "";
483 } 483 }
484 scoped_z.reset(&z); 484 scoped_z.reset(&z);
485 485
486 string zlib_dict = ZlibDictForEntries(entries, certs); 486 string zlib_dict = ZlibDictForEntries(entries, certs);
487 487
488 rv = deflateSetDictionary(&z, reinterpret_cast<const uint8*>(&zlib_dict[0]), 488 rv = deflateSetDictionary(
489 zlib_dict.size()); 489 &z, reinterpret_cast<const uint8*>(&zlib_dict[0]), zlib_dict.size());
490 DCHECK_EQ(Z_OK, rv); 490 DCHECK_EQ(Z_OK, rv);
491 if (rv != Z_OK) { 491 if (rv != Z_OK) {
492 return ""; 492 return "";
493 } 493 }
494 494
495 compressed_size = deflateBound(&z, uncompressed_size); 495 compressed_size = deflateBound(&z, uncompressed_size);
496 } 496 }
497 497
498 const size_t entries_size = CertEntriesSize(entries); 498 const size_t entries_size = CertEntriesSize(entries);
499 499
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637 } 637 }
638 638
639 if (!uncompressed.empty()) { 639 if (!uncompressed.empty()) {
640 return false; 640 return false;
641 } 641 }
642 642
643 return true; 643 return true;
644 } 644 }
645 645
646 } // namespace net 646 } // namespace net
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