Question

谁能告诉我miastake在哪里？我现在不知道。

//获取查询Dic

+ (NSMutableDictionary *)keychainQueryDictionary:(NSString *)service
{
    return [NSMutableDictionary dictionaryWithObjectsAndKeys:
            (__bridge id)kSecClassGenericPassword,(__bridge id)kSecClass,
            service, (__bridge id)kSecAttrService,
            service, (__bridge id)kSecAttrAccount,
            (__bridge id)kSecAttrAccessibleAfterFirstUnlock,(__bridge id)kSecAttrAccessible,
            nil];
}

//这里我将一些数据保存到钥匙串

+ (OSStatus)saveData:(id)data service:(NSString *)serviceIdentify
{
    NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];

    SecItemDelete((__bridge CFDictionaryRef)keychainQuery);

    [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];

    return SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}

//删除操作

+ (OSStatus)deleteData:(NSString *)serviceIdentify
{
    NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
    return SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}

//这里我尝试更新keychian中的一个项目，但是我得到一个错误-50，但我不知道错误的参数在哪里

+ (OSStatus)updataData:(id)data service:(NSString *)serviceIdentify
{
    NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
    [keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
    [keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];

    CFDataRef keyData = NULL;
    OSStatus status = errSecNotAvailable;
    if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
        NSMutableDictionary *queryDict = nil;
        NSDictionary *ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
        queryDict = [NSMutableDictionary dictionaryWithDictionary:ret];
        [queryDict setObject:[keychainQuery objectForKey:(__bridge id)kSecClass] forKey:(__bridge id)kSecClass];

        NSMutableDictionary *attributesToUpdate = [self keychainQueryDictionary:serviceIdentify];
        [attributesToUpdate setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];

        status = SecItemUpdate((__bridge CFDictionaryRef)queryDict,(__bridge CFDictionaryRef)attributesToUpdate);
    }

    return status;
}

//读取操作

+ (id)loadData:(NSString *)serviceIdentify
{
    id ret = nil;
    NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
    [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)   {
        ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
    }
    return ret;
}

Answer 1

-50是errSecParam。我认为你已经为SecItemUpdate翻转了参数。第一个参数是搜索查询，以查找需要更新的匹配项。这可能应该通过调用keychainQueryDictionary方法来创建。第二个参数应该包含更改 - 在您的示例中，这是您正在执行的kSecValueData的新数据，但字典通常不包含任何搜索属性。在您的示例中，它看起来还包含所有搜索属性，这将导致errSecParam。

作为一个单独的点，还要注意，keychainQuery字典中不适用于更新的任何值也会导致errSecParam。如果存在这些值，则可以简单地将其删除，例如：

<IfModule mod_fcgid.c> 
FcgidConnectTimeout 43200 
FcgidBusyTimeout 43200 
FcgidIOTimeout 43200 
FcgidMaxRequestLen 335544320 
FcgidMaxRequestsPerProcess 20000 
</IfModule>

在模拟器中使用SecItemUpdate并获得错误-50

1 个答案: