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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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