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

Issue 15074007: Land Recent QUIC changes. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: fix for windows Created 7 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 #ifndef NET_QUIC_CRYPTO_CERT_COMPRESSOR_H_ 5 #ifndef NET_QUIC_CRYPTO_CERT_COMPRESSOR_H_
6 #define NET_QUIC_CRYPTO_CERT_COMPRESSOR_H_ 6 #define NET_QUIC_CRYPTO_CERT_COMPRESSOR_H_
7 7
8 #include <string> 8 #include <string>
9 #include <vector> 9 #include <vector>
10 10
11 #include "base/basictypes.h" 11 #include "base/basictypes.h"
12 #include "base/strings/string_piece.h" 12 #include "base/strings/string_piece.h"
13 #include "net/base/net_export.h" 13 #include "net/base/net_export.h"
14 #include "net/quic/crypto/common_cert_set.h" 14 #include "net/quic/crypto/common_cert_set.h"
15 #include "net/quic/crypto/crypto_protocol.h" 15 #include "net/quic/crypto/crypto_protocol.h"
16 16
17 namespace net { 17 namespace net {
18 18
19 // CertCompressor provides functions for compressing and decompressing 19 // CertCompressor provides functions for compressing and decompressing
20 // certificate chains using three techniquies: 20 // certificate chains using three techniquies:
21 // 1) The peer may provide a list of a 64-bit, FNV-1a hashes of certificates 21 // 1) The peer may provide a list of a 64-bit, FNV-1a hashes of certificates
22 // that they already have. In the event that one of them is to be 22 // that they already have. In the event that one of them is to be
23 // compressed, it can be replaced with just the hash. 23 // compressed, it can be replaced with just the hash.
24 // 2) The peer may provide a number of hashes that represent sets of 24 // 2) The peer may provide a number of hashes that represent sets of
25 // pre-shared certificates (CommonCertSets). If one of those certificates 25 // pre-shared certificates. If one of those certificates is to be
26 // is to be compressed, and it's known to the given CommonCertSets, then it 26 // compressed, and it's known to the given CommonCertSets, then it can be
27 // can be replaced with a set hash and certificate index. 27 // replaced with a set hash and certificate index.
28 // 3) Otherwise the certificates are compressed with zlib using a pre-shared 28 // 3) Otherwise the certificates are compressed with zlib using a pre-shared
29 // dictionary that consists of the certificates handled with the above 29 // dictionary that consists of the certificates handled with the above
30 // methods and a small chunk of common substrings. 30 // methods and a small chunk of common substrings.
31 class NET_EXPORT_PRIVATE CertCompressor { 31 class NET_EXPORT_PRIVATE CertCompressor {
32 public: 32 public:
33 // CompressChain compresses the certificates in |certs| and returns a 33 // CompressChain compresses the certificates in |certs| and returns a
34 // compressed representation. |common_set| contains the common certificate 34 // compressed representation. |common_sets| contains the common certificate
35 // sets known locally and |client_common_set_hashes| contains the hashes of 35 // sets known locally and |client_common_set_hashes| contains the hashes of
36 // the common sets known to the peer. |client_cached| contains 64-bit, FNV-1a 36 // the common sets known to the peer. |client_cached_cert_hashes| contains
37 // hashes of certificates that the peer already possesses. 37 // 64-bit, FNV-1a hashes of certificates that the peer already possesses.
38 static std::string CompressChain(const std::vector<std::string>& certs, 38 static std::string CompressChain(const std::vector<std::string>& certs,
39 base::StringPiece client_common_set_hashes, 39 base::StringPiece client_common_set_hashes,
40 base::StringPiece client_cached_cert_hashes, 40 base::StringPiece client_cached_cert_hashes,
41 const CommonCertSets* common_set); 41 const CommonCertSets* common_sets);
42 42
43 // DecompressChain decompresses the result of |CompressChain|, given in |in|, 43 // DecompressChain decompresses the result of |CompressChain|, given in |in|,
44 // into a series of certificates that are written to |out_certs|. 44 // into a series of certificates that are written to |out_certs|.
45 // |cached_certs| contains certificates that the peer may have omitted and 45 // |cached_certs| contains certificates that the peer may have omitted and
46 // |common_set| contains the common certificate sets known locally. 46 // |common_sets| contains the common certificate sets known locally.
47 static bool DecompressChain(base::StringPiece in, 47 static bool DecompressChain(base::StringPiece in,
48 const std::vector<std::string>& cached_certs, 48 const std::vector<std::string>& cached_certs,
49 const CommonCertSets* common_set, 49 const CommonCertSets* common_sets,
50 std::vector<std::string>* out_certs); 50 std::vector<std::string>* out_certs);
51 }; 51 };
52 52
53 } // namespace net 53 } // namespace net
54 54
55 #endif // NET_QUIC_CRYPTO_CERT_COMPRESSOR_H_ 55 #endif // NET_QUIC_CRYPTO_CERT_COMPRESSOR_H_
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