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 CHROME_BROWSER_MAC_KEYCHAIN_REAUTHORIZE_H_ 6 #define CHROME_BROWSER_MAC_KEYCHAIN_REAUTHORIZE_H_ 7 8 #ifdef __OBJC__ 9 @class NSString; 10 #else 11 class NSString; 12 #endif 13 14 namespace chrome { 15 16 // Reauthorizes all Keychain items that can be found in a standard Keychain 17 // search, as long as they are accessible and can be decrypted. This operates 18 // by scanning the requirement strings for each application in each ACL in 19 // each accessible Keychain item. If any requirement string matches a list of 20 // strings to perform reauthorization for, the matching application in the ACL 21 // will be replaced with this application, using this application's designated 22 // requirement as the requirement string. Keychain items that are reauthorized 23 // are made effective by deleting the original item and storing the new one 24 // with its revised access policy in the Keychain. This circuitous method is 25 // used because applications don't generally have permission to modify access 26 // control policies on existing Keychain items (even when they are able to 27 // decrypt those items), but any application can remove a Keychain item. 28 void KeychainReauthorize(); 29 30 // Calls KeychainReauthorize, but only if it's determined that it's necessary. 31 // pref_key is looked up in the system's standard user defaults (preferences) 32 // and if its integer value is less than max_tries, KeychainReauthorize is 33 // attempted. Before the attempt, the preference is incremented, allowing a 34 // finite number of incomplete attempts at performing the KeychainReauthorize 35 // operation. When the step completes successfully, the preference is set to 36 // max_tries to prevent further attempts, and the preference name with the 37 // word "Success" appended is also stored with a boolean value of YES, 38 // disambiguating between the cases where the step completed successfully and 39 // the step completed unsuccessfully while reaching the maximum number of 40 // tries. 41 // 42 // The system's standard user defaults for the application are used 43 // (~/Library/Preferences/com.google.Chrome.plist, 44 // com.google.Chrome.canary.plist, etc.) instead of Chrome preferences because 45 // Keychain access is tied more closely to the bundle identifier and signed 46 // product than it is to any specific profile (--user-data-dir). 47 void KeychainReauthorizeIfNeeded(NSString* pref_key, int max_tries); 48 49 } // namespace chrome 50 51 #endif // CHROME_BROWSER_MAC_KEYCHAIN_REAUTHORIZE_H_ 52
