使用KeyChainItemWrapper在KeyChain中存储密钥 [英] Storing keys in KeyChain with KeyChainItemWrapper

问题描述

我正在使用Apple的示例代码提供的KeyChainItemWrapper类将身份验证令牌保存到钥匙串。

I'm using KeyChainItemWrapper class, provided by Apple's Sample Code to save the authentication token to the keychain.

KeychainItemWrapper *keychain = [[KeychainItemWrapper alloc] initWithIdentifier"JetTaxiApp_AuthToken" accessGroup:nil];  

但是当我试图将值设置为keychain时，会引发奇怪的异常

But when I'm trying to set the value to keychain, an odd exception is raised

[_authenticationTokenKeychain setObject:authenticationToken forKey: @"auth_token"];

由于未捕获的异常而终止应用
'NSInternalInconsistencyException'，原因：'无法添加钥匙串
项。'

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Couldn't add the Keychain Item.'

钥匙串尚不存在（目前这个电话）
什么可能导致这个例外？

The keychain doesn't exist yet (at the moment of this call) What can cause this exception?

推荐答案

你需要使用标准键，所以这里你的 @auth_token不正确。

You need to use standard keys, so here your @"auth_token" is incorrect.

可用于此目的的密钥每个键的可能值都列在Keychain Services Constants部分。

The keys that can be used for this purpose and the possible values for each key are listed in the "Keychain Services Constants" section.

source，包含有效常量列表：< a href =http://developer.apple.com/library/ios/#documentation/Security/Reference/keychainservices/Reference/reference.html\"rel =noreferrer>钥匙串服务参考

source, with list of valid constants: Keychain Services Reference

例如，您可以使用：

[_ authenticationTok enKeychain setObject：authenticationToken forKey：（__ bridge NSString *）kSecValueData];

[_authenticationTokenKeychain setObject:authenticationToken forKey: (__bridge NSString *)kSecValueData];

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