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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 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 COMPONENTS_CRX_FILE_CRX_FILE_H_ | 5 #ifndef COMPONENTS_CRX_FILE_CRX_FILE_H_ |
6 #define COMPONENTS_CRX_FILE_CRX_FILE_H_ | 6 #define COMPONENTS_CRX_FILE_CRX_FILE_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
| 11 #include <stddef.h> |
| 12 #include <stdint.h> |
11 #include <sys/types.h> | 13 #include <sys/types.h> |
12 #include "base/basictypes.h" | |
13 #include "base/memory/scoped_ptr.h" | 14 #include "base/memory/scoped_ptr.h" |
14 | 15 |
15 namespace base { | 16 namespace base { |
16 class FilePath; | 17 class FilePath; |
17 } | 18 } |
18 | 19 |
19 namespace crx_file { | 20 namespace crx_file { |
20 | 21 |
21 // CRX files have a header that includes a magic key, version number, and | 22 // CRX files have a header that includes a magic key, version number, and |
22 // some signature sizing information. Use CrxFile object to validate whether | 23 // some signature sizing information. Use CrxFile object to validate whether |
23 // the header is valid or not. | 24 // the header is valid or not. |
24 class CrxFile { | 25 class CrxFile { |
25 public: | 26 public: |
26 // The size of the magic character sequence at the beginning of each crx | 27 // The size of the magic character sequence at the beginning of each crx |
27 // file, in bytes. This should be a multiple of 4. | 28 // file, in bytes. This should be a multiple of 4. |
28 static const size_t kCrxFileHeaderMagicSize = 4; | 29 static const size_t kCrxFileHeaderMagicSize = 4; |
29 | 30 |
30 // This header is the first data at the beginning of an extension. Its | 31 // This header is the first data at the beginning of an extension. Its |
31 // contents are purposely 32-bit aligned so that it can just be slurped into | 32 // contents are purposely 32-bit aligned so that it can just be slurped into |
32 // a struct without manual parsing. | 33 // a struct without manual parsing. |
33 struct Header { | 34 struct Header { |
34 char magic[kCrxFileHeaderMagicSize]; | 35 char magic[kCrxFileHeaderMagicSize]; |
35 uint32 version; | 36 uint32_t version; |
36 uint32 key_size; // The size of the public key, in bytes. | 37 uint32_t key_size; // The size of the public key, in bytes. |
37 uint32 signature_size; // The size of the signature, in bytes. | 38 uint32_t signature_size; // The size of the signature, in bytes. |
38 // An ASN.1-encoded PublicKeyInfo structure follows. | 39 // An ASN.1-encoded PublicKeyInfo structure follows. |
39 // The signature follows. | 40 // The signature follows. |
40 }; | 41 }; |
41 | 42 |
42 enum Error { | 43 enum Error { |
43 kWrongMagic, | 44 kWrongMagic, |
44 kInvalidVersion, | 45 kInvalidVersion, |
45 kInvalidKeyTooLarge, | 46 kInvalidKeyTooLarge, |
46 kInvalidKeyTooSmall, | 47 kInvalidKeyTooSmall, |
47 kInvalidSignatureTooLarge, | 48 kInvalidSignatureTooLarge, |
48 kInvalidSignatureTooSmall, | 49 kInvalidSignatureTooSmall, |
49 }; | 50 }; |
50 | 51 |
51 // Construct a new CRX file header object with bytes of a header | 52 // Construct a new CRX file header object with bytes of a header |
52 // read from a CRX file. If a null scoped_ptr is returned, |error| | 53 // read from a CRX file. If a null scoped_ptr is returned, |error| |
53 // contains an error code with additional information. | 54 // contains an error code with additional information. |
54 static scoped_ptr<CrxFile> Parse(const Header& header, Error* error); | 55 static scoped_ptr<CrxFile> Parse(const Header& header, Error* error); |
55 | 56 |
56 // Construct a new header for the given key and signature sizes. | 57 // Construct a new header for the given key and signature sizes. |
57 // Returns a null scoped_ptr if erroneous values of |key_size| and/or | 58 // Returns a null scoped_ptr if erroneous values of |key_size| and/or |
58 // |signature_size| are provided. |error| contains an error code with | 59 // |signature_size| are provided. |error| contains an error code with |
59 // additional information. | 60 // additional information. |
60 // Use this constructor and then .header() to obtain the Header | 61 // Use this constructor and then .header() to obtain the Header |
61 // for writing out to a CRX file. | 62 // for writing out to a CRX file. |
62 static scoped_ptr<CrxFile> Create(const uint32 key_size, | 63 static scoped_ptr<CrxFile> Create(const uint32_t key_size, |
63 const uint32 signature_size, | 64 const uint32_t signature_size, |
64 Error* error); | 65 Error* error); |
65 | 66 |
66 // Returns the header structure for writing out to a CRX file. | 67 // Returns the header structure for writing out to a CRX file. |
67 const Header& header() const { return header_; } | 68 const Header& header() const { return header_; } |
68 | 69 |
69 // Checks a valid |header| to determine whether or not the CRX represents a | 70 // Checks a valid |header| to determine whether or not the CRX represents a |
70 // differential CRX. | 71 // differential CRX. |
71 static bool HeaderIsDelta(const Header& header); | 72 static bool HeaderIsDelta(const Header& header); |
72 | 73 |
73 enum class ValidateError { | 74 enum class ValidateError { |
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108 explicit CrxFile(const Header& header); | 109 explicit CrxFile(const Header& header); |
109 | 110 |
110 // Checks the |header| for validity and returns true if the values are valid. | 111 // Checks the |header| for validity and returns true if the values are valid. |
111 // If false is returned, more detailed error code is returned in |error|. | 112 // If false is returned, more detailed error code is returned in |error|. |
112 static bool HeaderIsValid(const Header& header, Error* error); | 113 static bool HeaderIsValid(const Header& header, Error* error); |
113 }; | 114 }; |
114 | 115 |
115 } // namespace crx_file | 116 } // namespace crx_file |
116 | 117 |
117 #endif // COMPONENTS_CRX_FILE_CRX_FILE_H_ | 118 #endif // COMPONENTS_CRX_FILE_CRX_FILE_H_ |
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