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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_BROWSER_NET_PACKED_CT_EV_WHITELIST_H_ | |
6 #define CHROME_BROWSER_NET_PACKED_CT_EV_WHITELIST_H_ | |
7 | |
8 #include <stdint.h> | |
9 | |
10 #include <string> | |
11 #include <vector> | |
12 | |
13 #include "base/gtest_prod_util.h" | |
14 #include "base/memory/ref_counted.h" | |
Ryan Sleevi
2014/10/21 22:50:26
Unusued?
Eran Messeri
2014/10/22 10:53:26
Done.
| |
15 #include "base/strings/string_piece.h" | |
Ryan Sleevi
2014/10/21 22:50:25
Unused?
Eran Messeri
2014/10/22 10:53:27
Done.
| |
16 #include "net/cert/ct_ev_whitelist.h" | |
17 | |
18 namespace base { | |
19 class FilePath; | |
20 } | |
21 | |
22 // An implementation of the EVCertsWhitelist that gets its data packed using | |
23 // Golomb coding to encode the difference between subsequent hash values. | |
24 // Format of the packed list: | |
25 // * First 8 bytes: First hash | |
26 // * Repeating Golomb-coded number which is the numberic difference of the | |
Ryan Sleevi
2014/10/21 22:50:25
s/numeric/
Eran Messeri
2014/10/22 10:53:26
Done.
| |
27 // previous hash value from this one | |
28 // | |
29 // The resulting, unpacked list is a sorted list of hash values that can be | |
30 // efficiently searched. | |
31 class PackedEVCertsWhitelist : public net::ct::EVCertsWhitelist { | |
32 public: | |
33 // Unpacks the given |compressed_whitelist|. See the class documentation | |
34 // for description of the |compressed_whitelist| format. | |
35 explicit PackedEVCertsWhitelist(const std::string& compressed_whitelist); | |
36 | |
37 // Returns true if the |certificate_hash| appears in the EV certificate hashes | |
38 // whitelist. Must not be called if IsValid for this instance returned false. | |
39 virtual bool ContainsCertificateHash( | |
40 const std::string& certificate_hash) const override; | |
41 | |
42 // Returns true if the EV certificate hashes whitelist provided in the c'tor | |
43 // was valid, false otherwise. | |
44 virtual bool IsValid() const override; | |
Ryan Sleevi
2014/10/21 22:50:25
latest Chromium style is you can drop the "virtual
Eran Messeri
2014/10/22 10:53:26
Done.
| |
45 | |
46 protected: | |
47 virtual ~PackedEVCertsWhitelist(); | |
Ryan Sleevi
2014/10/21 22:50:25
latest Chromium style is
~PackedEVCertsWhitelist(
Eran Messeri
2014/10/22 10:53:26
Done.
| |
48 FRIEND_TEST_ALL_PREFIXES(PackedEVCertsWhitelistTest, | |
49 UncompressFailsForTooShortList); | |
50 FRIEND_TEST_ALL_PREFIXES(PackedEVCertsWhitelistTest, | |
51 UncompressFailsForTruncatedList); | |
52 FRIEND_TEST_ALL_PREFIXES(PackedEVCertsWhitelistTest, | |
53 UncompressFailsForInvalidValuesInList); | |
54 FRIEND_TEST_ALL_PREFIXES(PackedEVCertsWhitelistTest, | |
55 UncompressesWhitelistCorrectly); | |
Ryan Sleevi
2014/10/21 22:50:25
These can / should all be private friends, not pro
Eran Messeri
2014/10/22 10:53:27
Done.
| |
56 | |
57 private: | |
58 // Given a Golomb-coded list of hashes in |compressed_whitelist|, unpack into | |
59 // |uncompressed_list|. Returns true if the format of the compressed whitelist | |
60 // is valid, false otherwise. | |
61 static bool UncompressEVWhitelist( | |
62 const std::string& compressed_whitelist, | |
63 std::vector<std::string>* uncompressed_list); | |
64 | |
65 bool is_whitelist_valid_; | |
66 // The whitelist is an array containing certificate hashes (truncated | |
67 // to a fixed size of 8 bytes), sorted. | |
68 // Binary search is used to locate hashes in the the array. | |
69 // Benchmarking bsearch vs std::set (with 120K entries, doing 1.2M lookups) | |
70 // shows that bsearch is about twice as fast as std::set lookups (and std::set | |
71 // has additional memory overhead). | |
72 char* whitelist_; | |
73 uint32_t whitelist_size_; | |
Ryan Sleevi
2014/10/21 22:50:25
DISALLOW_COPY_AND_ASSIGN
Eran Messeri
2014/10/22 10:53:27
Done.
| |
74 }; | |
75 | |
76 // Sets the EV certificate hashes whitelist from |compressed_whitelist_file| | |
77 // in |ssl_config_service|, after uncompressing it. | |
78 // If the data in |compressed_whitelist_file| is not a valid compressed | |
79 // whitelist, does nothing. | |
80 // As this function performs file operations, it should be called from a | |
81 // blocking pool worker or a file worker. | |
82 // To set the new whitelist, this function dispatches a task to the IO thread. | |
83 void SetEVWhitelistFromFile(const base::FilePath& compressed_whitelist_file); | |
84 | |
85 #endif // CHROME_BROWSER_NET_PACKED_CT_EV_WHITELIST_H_ | |
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