为什么SecItemAdd返回我-50(无效参数) [英] Why SecItemAdd return me -50 (invalid params)
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问题描述
我想在钥匙串中存储值"MyKeyValue",我这样做:
I want to store in the keychain the value "MyKeyValue" and I do like this :
NSData* key = [@"MyKeyValue" dataUsingEncoding:NSUTF8StringEncoding];
NSData* tag = [@"com.example.MyKey" dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary* addquery = @{ (id)kSecValueRef: key,
(id)kSecClass: (id)kSecClassKey,
(id)kSecAttrApplicationTag: tag,
};
OSStatus status = SecItemAdd((__bridge CFDictionaryRef)addquery, NULL);
但是失败,错误为-50(无效的参数) 我做错了什么?
but this failed with error -50 (Invalid params) What i did wrong ?
我想在钥匙串中存储一个字符串,如果用户卸载并重新安装我的应用程序,则可以检索该字符串.
I would like to store in the keychain a string that can be retrieved if the user uninstall and reinstall my app.
推荐答案
由于kSecValueRef
,因此发生了错误,按照Apple的准则kSecValueRef
接受可以通过SecKeyRef
生成的加密密钥,请在下面找到,
The error is occurring because of kSecValueRef
, as per Apple's guideline kSecValueRef
accepts a cryptographic key which can be generated through SecKeyRef
, Please find below,
NSData* tag = [@"com.example.keys.mykey" dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary* attributes =
@{ (id)kSecAttrKeyType: (id)kSecAttrKeyTypeRSA,
(id)kSecAttrKeySizeInBits: @2048,
(id)kSecPrivateKeyAttrs:
@{ (id)kSecAttrIsPermanent: @YES,
(id)kSecAttrApplicationTag: tag,
},
};
CFErrorRef error = NULL;
SecKeyRef privateKey = SecKeyCreateRandomKey((__bridge CFDictionaryRef)attributes,
&error);
SecKeyRef publicKey = SecKeyCopyPublicKey(privateKey);
NSDictionary* addquery = @{ (id)kSecValueRef: (__bridge id)publicKey,
(id)kSecClass: (id)kSecClassKey,
(id)kSecAttrApplicationTag: tag,
};
OSStatus status = SecItemAdd((__bridge CFDictionaryRef)addquery, NULL);
有关更多信息,请参考在钥匙串中存储钥匙
For more info please refer Storing Keys in the Keychain
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