RSA加密公钥？

发布于 2024-12-02 09:41:18 字数 75 浏览 2 评论 0原文

如何在 iOS 中从“模数”和“指数”创建 RSA 加密公钥？我已经从钥匙串创建了公钥。是否可以从字符串“模数”和“指数”值中获得？

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书间行客 2024-12-09 09:41:18

请在此处查看此答案

https://stackoverflow.com/a/10643894/584616

https://github.com/StCredZero/SCZ-BasicEncodingRules-iOS

SCZ-BasicEncodingRules-iOS

实现基本编码规则以启用将 RSA 密钥导入到 iOS
使用指数的钥匙串。代码针对带有 ARC 的 iOS 5。

假设您已经有一个模数和指数
RSA 公钥作为名为 pubKeyModData 的变量中的 NSData 和
pubKeyModData。然后以下代码将创建一个包含该 RSA 的 NSData
公钥，然后您可以将其插入 iOS 或 OS X 钥匙串中。

NSMutableArray *testArray = [[NSMutableArray alloc] init];
[testArray addObject:pubKeyModData];
[testArray addObject:pubKeyExpData];
NSData *testPubKey = [testArray berData];

这将允许您使用 Apple CryptoExercise 示例中 SecKeyWrapper 的 addPeerPublicKey:keyBits: 方法来存储密钥。或者，从底层API的角度来看，您可以使用SecItemAdd()。

NSString * peerName = @"Test Public Key";

NSData * peerTag = 
   [[NSData alloc] 
       initWithBytes:(const void *)[peerName UTF8String] 
       length:[peerName length]];

NSMutableDictionary * peerPublicKeyAttr = [[NSMutableDictionary alloc] init];

[peerPublicKeyAttr 
   setObject:(__bridge id)kSecClassKey 
   forKey:(__bridge id)kSecClass];
[peerPublicKeyAttr 
   setObject:(__bridge id)kSecAttrKeyTypeRSA 
   forKey:(__bridge id)kSecAttrKeyType];
[peerPublicKeyAttr 
   setObject:peerTag 
   forKey:(__bridge id)kSecAttrApplicationTag];
[peerPublicKeyAttr 
   setObject:testPubKey 
   forKey:(__bridge id)kSecValueData];
[peerPublicKeyAttr 
   setObject:[NSNumber numberWithBool:YES] 
   forKey:(__bridge id)kSecReturnPersistentRef];

sanityCheck = SecItemAdd((__bridge CFDictionaryRef) peerPublicKeyAttr, (CFTypeRef *)&persistPeer);

See this answer over here

https://stackoverflow.com/a/10643894/584616

https://github.com/StCredZero/SCZ-BasicEncodingRules-iOS

SCZ-BasicEncodingRules-iOS

Implementation of Basic Encoding Rules to enable import of RSA keys to iOS
KeyChain using exponent. Code targets iOS 5 with ARC.

Let's say you already have a modulus and exponent from
an RSA public key as an NSData in variables named pubKeyModData and
pubKeyModData. Then the following code will create an NSData containing that RSA
public key, which you can then insert into the iOS or OS X Keychain.

NSMutableArray *testArray = [[NSMutableArray alloc] init];
[testArray addObject:pubKeyModData];
[testArray addObject:pubKeyExpData];
NSData *testPubKey = [testArray berData];

This would allow you to store the key using the addPeerPublicKey:keyBits: method from SecKeyWrapper in the Apple CryptoExercise example. Or, from the perspective of the low-level API, you can use SecItemAdd().

NSString * peerName = @"Test Public Key";

NSData * peerTag = 
   [[NSData alloc] 
       initWithBytes:(const void *)[peerName UTF8String] 
       length:[peerName length]];

NSMutableDictionary * peerPublicKeyAttr = [[NSMutableDictionary alloc] init];

[peerPublicKeyAttr 
   setObject:(__bridge id)kSecClassKey 
   forKey:(__bridge id)kSecClass];
[peerPublicKeyAttr 
   setObject:(__bridge id)kSecAttrKeyTypeRSA 
   forKey:(__bridge id)kSecAttrKeyType];
[peerPublicKeyAttr 
   setObject:peerTag 
   forKey:(__bridge id)kSecAttrApplicationTag];
[peerPublicKeyAttr 
   setObject:testPubKey 
   forKey:(__bridge id)kSecValueData];
[peerPublicKeyAttr 
   setObject:[NSNumber numberWithBool:YES] 
   forKey:(__bridge id)kSecReturnPersistentRef];

sanityCheck = SecItemAdd((__bridge CFDictionaryRef) peerPublicKeyAttr, (CFTypeRef *)&persistPeer);

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