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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 BASE_GUID_H_ | 5 #ifndef BASE_GUID_H_ |
6 #define BASE_GUID_H_ | 6 #define BASE_GUID_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
11 | 11 |
12 #include "base/base_export.h" | 12 #include "base/base_export.h" |
| 13 #include "base/strings/string_piece.h" |
13 #include "build/build_config.h" | 14 #include "build/build_config.h" |
14 | 15 |
15 namespace base { | 16 namespace base { |
16 | 17 |
17 // Generate a 128-bit random GUID of the form: "%08X-%04X-%04X-%04X-%012llX". | 18 // Generate a 128-bit (pseudo) random GUID in the form of version 4 as described |
| 19 // in RFC 4122, section 4.4. |
| 20 // The format of GUID version 4 must be xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, |
| 21 // where y is one of [8, 9, A, B]. |
| 22 // The hexadecimal values "a" through "f" are output as lower case characters. |
18 // If GUID generation fails an empty string is returned. | 23 // If GUID generation fails an empty string is returned. |
19 // The POSIX implementation uses pseudo random number generation to create | |
20 // the GUID. The Windows implementation uses system services. | |
21 BASE_EXPORT std::string GenerateGUID(); | 24 BASE_EXPORT std::string GenerateGUID(); |
22 | 25 |
23 // Returns true if the input string conforms to the GUID format. | 26 // Returns true if the input string conforms to the version 4 GUID format. |
24 BASE_EXPORT bool IsValidGUID(const std::string& guid); | 27 // Note that this does NOT check if the hexadecimal values "a" through "f" |
| 28 // are in lower case characters, as Version 4 RFC says onput they're |
| 29 // case insensitive. (Use IsValidGUIDOutputString for checking if the |
| 30 // given string is valid output string) |
| 31 BASE_EXPORT bool IsValidGUID(const base::StringPiece& guid); |
25 | 32 |
26 #if defined(OS_POSIX) | 33 // Returns true if the input string is valid version 4 GUID output string. |
| 34 // This also checks if the hexadecimal values "a" through "f" are in lower |
| 35 // case characters. |
| 36 BASE_EXPORT bool IsValidGUIDOutputString(const base::StringPiece& guid); |
| 37 |
27 // For unit testing purposes only. Do not use outside of tests. | 38 // For unit testing purposes only. Do not use outside of tests. |
28 BASE_EXPORT std::string RandomDataToGUIDString(const uint64_t bytes[2]); | 39 BASE_EXPORT std::string RandomDataToGUIDString(const uint64_t bytes[2]); |
29 #endif | |
30 | 40 |
31 } // namespace base | 41 } // namespace base |
32 | 42 |
33 #endif // BASE_GUID_H_ | 43 #endif // BASE_GUID_H_ |
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