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/* * Copyright 2019 Google * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
#import "FIRInstanceIDKeychain.h"
#import "FIRInstanceIDLogger.h"
NSString *const kFIRInstanceIDKeychainErrorDomain = @"com.google.iid";
@interface FIRInstanceIDKeychain () { dispatch_queue_t _keychainOperationQueue; }
@end
@implementation FIRInstanceIDKeychain
+ (instancetype)sharedInstance { static FIRInstanceIDKeychain *sharedInstance; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[FIRInstanceIDKeychain alloc] init]; }); return sharedInstance; }
- (instancetype)init { self = [super init]; if (self) { _keychainOperationQueue = dispatch_queue_create("com.google.FirebaseInstanceID.Keychain", DISPATCH_QUEUE_SERIAL); } return self; }
- (CFTypeRef)itemWithQuery:(NSDictionary *)keychainQuery { __block SecKeyRef keyRef = NULL; dispatch_sync(_keychainOperationQueue, ^{ OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyRef);
if (status != noErr) { if (keyRef) { CFRelease(keyRef); } FIRInstanceIDLoggerDebug(kFIRInstanceIDKeychainReadItemError, @"Info is not found in Keychain. OSStatus: %d. Keychain query: %@", (int)status, keychainQuery); } }); return keyRef; }
- (void)removeItemWithQuery:(NSDictionary *)keychainQuery handler:(void (^)(NSError *error))handler { dispatch_async(_keychainOperationQueue, ^{ OSStatus status = SecItemDelete((__bridge CFDictionaryRef)keychainQuery); if (status != noErr) { FIRInstanceIDLoggerDebug( kFIRInstanceIDKeychainDeleteItemError, @"Couldn't delete item from Keychain OSStatus: %d with the keychain query %@", (int)status, keychainQuery); }
if (handler) { NSError *error; // When item is not found, it should NOT be considered as an error. The operation should // continue. if (status != noErr && status != errSecItemNotFound) { error = [NSError errorWithDomain:kFIRInstanceIDKeychainErrorDomain code:status userInfo:nil]; } dispatch_async(dispatch_get_main_queue(), ^{ handler(error); }); } }); }
- (void)addItemWithQuery:(NSDictionary *)keychainQuery handler:(void (^)(NSError *))handler { dispatch_async(_keychainOperationQueue, ^{ OSStatus status = SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
if (handler) { NSError *error; if (status != noErr) { FIRInstanceIDLoggerWarning(kFIRInstanceIDKeychainAddItemError, @"Couldn't add item to Keychain OSStatus: %d", (int)status); error = [NSError errorWithDomain:kFIRInstanceIDKeychainErrorDomain code:status userInfo:nil]; } dispatch_async(dispatch_get_main_queue(), ^{ handler(error); }); } }); }
@end
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