在我的应用程序中,我想要同步用户创建的配置。我希望使用iCloud来同步该配置,以便在所有设备上始终保持相同。但是,我使用钥匙串存储密码。
有没有办法也同步钥匙串数据?
有没有办法也同步钥匙串数据?
iCloud钥匙串是iOS 7.0.3和OS X Mavericks 10.9中的新功能。在使用SecItem API添加钥匙串项时,需要指定kSecAttrSynchronizable
属性。
以下是我为钥匙串制作的实用方法。kSecAttrSynchronizable 是使 iCloud 同步工作的关键。希望它们有所帮助。
Load item
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(__bridge id)kSecClassGenericPassword, (__bridge id)kSecClass,
service, (__bridge id)kSecAttrService,
service, (__bridge id)kSecAttrAccount,
service, (__bridge id)kSecAttrSynchronizable,
(__bridge id)kSecAttrAccessibleAfterFirstUnlock, (__bridge id)kSecAttrAccessible,
nil];
}
+ (void)save:(NSString *)service data:(id)data {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}
+ (void)remove:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}
+(NSString *)keychainItem:(NSString *)service{
id data = [self load:service];
if([data isKindOfClass:[NSString class]]){
return data;
}
return @"";
}
+ (id)load:(NSString *)service {
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
[keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
}
@catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@", service, e);
}
@finally {}
}
if (keyData) CFRelease(keyData);
return ret;
}