[英]Keychain access code leaking
这是泄漏:
这是我的代码:
+(NSString *)getSecureValueForKey:(NSString *)key {
// Retrieve a value from the keychain
NSDictionary *result;
NSArray *keys = [[[NSArray alloc] initWithObjects: (NSString *) kSecClass, kSecAttrAccount, kSecReturnAttributes, nil] autorelease];
NSArray *objects = [[[NSArray alloc] initWithObjects: (NSString *) kSecClassGenericPassword, key, kCFBooleanTrue, nil] autorelease];
NSDictionary *query = [[NSDictionary alloc] initWithObjects: objects forKeys: keys];
// Check if the value was found
OSStatus status = SecItemCopyMatching((CFDictionaryRef) query, (CFTypeRef *) &result);
[query release];
if (status != noErr) {
// Value not found
return nil;
} else {
// Value was found so return it
NSString *value = (NSString *) [result objectForKey: (NSString *) kSecAttrGeneric];
return value;
[result release];
}
}
+(BOOL)storeSecureValue:(NSString *)value forKey:(NSString *)key {
// Get the existing value for the key
NSString *existingValue = [self getSecureValueForKey:key];
// Check if a value already exists for this key
OSStatus status;
if (existingValue) {
// Value already exists, so update it
NSArray *keys = [[[NSArray alloc] initWithObjects: (NSString *) kSecClass, kSecAttrAccount, nil] autorelease];
NSArray *objects = [[[NSArray alloc] initWithObjects: (NSString *) kSecClassGenericPassword, key, nil] autorelease];
NSDictionary *query = [[[NSDictionary alloc] initWithObjects: objects forKeys: keys] autorelease];
status = SecItemUpdate((CFDictionaryRef) query, (CFDictionaryRef) [NSDictionary dictionaryWithObject:value forKey: (NSString *) kSecAttrGeneric]);
} else {
// Value does not exist, so add it
NSArray *keys = [[[NSArray alloc] initWithObjects: (NSString *) kSecClass, kSecAttrAccount, kSecAttrGeneric, nil] autorelease];
NSArray *objects = [[[NSArray alloc] initWithObjects: (NSString *) kSecClassGenericPassword, key, value, nil] autorelease];
NSDictionary *query = [[[NSDictionary alloc] initWithObjects: objects forKeys: keys] autorelease];
status = SecItemAdd((CFDictionaryRef) query, NULL);
}
// Check if the value was stored
if (status != noErr) {
// Value was not stored
return false;
} else {
// Value was stored
return true;
}
}
你能帮我解决吗? 每当我访问或将数据存储在钥匙串中时,就会发生泄漏。 我已经有很多时间没有使用ARC编程了,而且我无法追踪这种泄漏!
谢谢!
创建query
后释放keys
和objects
,返回value
之前释放result
,实际上释放在存储安全值方法期间创建的新对象。
此时,您可以选择了解内存管理的实际工作方式,或者仅打开ARC并让它为您处理大部分事务。
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