升级ios9后RSA加密SecItemAdd出问题的解决方法

升级ios9后RSA加密SecItemAdd出问题的解决方法！

问题描述(csdn上的网友)：

ret = SecItemAdd((__bridge CFDictionaryRef) publicKeyDict, (CFTypeRef*)&pubKeyRef);
在iOS8系统下下面的上面这句代码没问题，ret = 0，pubKeyRef的值是：
po pubKeyRef


在ios9下，这句返回值ret = 0，但是pubKeyRef得到的值为空。------摘录至：http://bbs.csdn.net/topics/391833626

问题描述:(苹果官方论坛上面网友的描述)：

Christianto Aug 20, 2015 9:04 PM

Hi Guys,

Recenlty I have been testing my code in iOS 9 with Xcode 7 Beta 5. In my app, I am using + (SecKeyRef) addPeerPublicKey:(NSString *) peerName withPublicKey:(NSData *) publicKey method to generate public key from exponent and modulus. It turns out that SecKeyRef generate is always nil in iOS 9 but works well in iOS 8. Is it bug for the Xcode 7 Beta 5 or There are several changing that i need to do in order to make it works in iOS 9?

Please help.

Thanks.

Best Regards,

Chris  摘录至：https://forums.developer.apple.com/thread/15129

解决办法：

原文链接：http://stackoverflow.com/questions/32096304/ios-9-secitemcopymatching-returns-successful-status-code-but-key-is-nil

up vote 1 down vote

The bug occurs due to malformed public key referhttps://forums.developer.apple.com/thread/15129 If you use Basic Encoding Rules library here's the solution. To fix your public key you need to insert nil byte before modulus data.https://github.com/StCredZero/SCZ-BasicEncodingRules-iOS/issues/6#issuecomment-136601437 P.S. For me fix was as simple as: const char fixByte = 0; NSMutableData * fixedModule = [NSMutableData dataWithBytes:&fixByte length:1]; [fixedModule appendData:modulusData]; share improve this answer

其他有用的参考资料：https://github.com/StCredZero/SCZ-BasicEncodingRules-iOS/issues/6#issuecomment-136601437

http://bbs.csdn.net/topics/391833626?page=1#post-400541458