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Side by Side Diff: net/base/hash_value.h

Issue 11274032: Separate http_security_headers from transport_security_state (Closed) Base URL: https://src.chromium.org/chrome/trunk/src/
Patch Set: Created 8 years, 1 month ago
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1 // Copyright (c) 2012 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 NET_BASE_HASH_VALUE_H_
6 #define NET_BASE_HASH_VALUE_H_
7
8 #include <string.h>
9
10 #include <string>
11 #include <vector>
12
13 #include "base/basictypes.h"
14 #include "build/build_config.h"
15
16 namespace net {
17
18 struct SHA1HashValue {
19 bool Equals(const SHA1HashValue& other) const {
20 return memcmp(data, other.data, sizeof(data)) == 0;
21 }
22
23 unsigned char data[20];
24 };
25
26 struct SHA256HashValue {
27 bool Equals(const SHA256HashValue& other) const {
28 return memcmp(data, other.data, sizeof(data)) == 0;
29 }
30
31 unsigned char data[32];
32 };
33
34 enum HashValueTag {
35 HASH_VALUE_SHA1,
36 HASH_VALUE_SHA256,
37
38 // This must always be last.
39 HASH_VALUE_TAGS_COUNT
40 };
41
42 class HashValue {
43 public:
44 explicit HashValue(HashValueTag tag) : tag(tag) {}
45 HashValue() : tag(HASH_VALUE_SHA1) {}
46
47 bool Equals(const HashValue& other) const;
48
49 // Parse/write in this format: "sha1/Guzek9lMwR3KeIS8wwS9gBvVtIg="
50 // i.e. <hash-name>"/"<base64-hash-value>
51 // This format is used for:
52 // - net_internals display/setting public-key pins
53 // - logging public-key pins
54 // - serializing public-key pins
55 //
56 // FromString() parse errors SHALL return false, and MAY leave the
57 // HashValue containing incorrect data
58 // ToString() errors (ie unknown tag) returns "unknown/"<base64>
59 // (but ToString() errors should not occur!)
60 bool FromString(const std::string& input);
61 std::string ToString() const;
62
63 size_t size() const;
64 unsigned char* data();
65 const unsigned char* data() const;
66
67 HashValueTag tag;
68
69 private:
70 union {
71 SHA1HashValue sha1;
72 SHA256HashValue sha256;
73 } fingerprint;
74 };
75
76 typedef std::vector<HashValue> HashValueVector;
77
78
79 class SHA1HashValueLessThan {
80 public:
81 bool operator()(const SHA1HashValue& lhs,
82 const SHA1HashValue& rhs) const {
83 return memcmp(lhs.data, rhs.data, sizeof(lhs.data)) < 0;
84 }
85 };
86
87 class SHA256HashValueLessThan {
88 public:
89 bool operator()(const SHA256HashValue& lhs,
90 const SHA256HashValue& rhs) const {
91 return memcmp(lhs.data, rhs.data, sizeof(lhs.data)) < 0;
92 }
93 };
94
95 class HashValuesEqual {
96 public:
97 explicit HashValuesEqual(const HashValue& fingerprint) :
98 fingerprint_(fingerprint) {}
99
100 bool operator()(const HashValue& other) const {
101 return fingerprint_.Equals(other);
102 }
103
104 const HashValue& fingerprint_;
105 };
106
107
108 // IsSHA1HashInSortedArray returns true iff |hash| is in |array|, a sorted
109 // array of SHA1 hashes.
110 bool IsSHA1HashInSortedArray(const SHA1HashValue& hash,
111 const uint8* array,
112 size_t array_byte_len);
113
114 } // namespace net
115
116 #endif // NET_BASE_HASH_VALUE_H_
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