iOS是否生成RSA非随机密钥对？

我希望每次应用相同的种子时都生成相同的非对称密钥对

我使用iOS RSA加密练习生成RSA非对称密钥对。 我每次也用同样的种子。（公共和私有标签） 但是，每次生成密钥时，我都会收到不同的密钥

- (void)generateKeyPair:(NSUInteger)keySize {
    OSStatus sanityCheck = noErr;
    publicKeyRef = NULL;
    privateKeyRef = NULL;

    LOGGING_FACILITY1( keySize == 512 || keySize == 1024 || keySize == 2048, @"%d is an invalid and unsupported key size.", keySize );

    // First delete current keys.
    [self deleteAsymmetricKeys];

    // Container dictionaries.
    NSMutableDictionary * privateKeyAttr = [[NSMutableDictionary alloc] init];
    NSMutableDictionary * publicKeyAttr = [[NSMutableDictionary alloc] init];
    NSMutableDictionary * keyPairAttr = [[NSMutableDictionary alloc] init];

    // Set top level dictionary for the keypair.
    [keyPairAttr setObject:(id)kSecAttrKeyTypeRSA forKey:(id)kSecAttrKeyType];
    [keyPairAttr setObject:[NSNumber numberWithUnsignedInteger:keySize] forKey:(id)kSecAttrKeySizeInBits];

    // Set the private key dictionary.
    [privateKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecAttrIsPermanent];
    [privateKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecAttrCanEncrypt];
    [privateKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecAttrCanDecrypt];

     [privateKeyAttr setObject:privateTag forKey:(id)kSecAttrApplicationTag];
    // See SecKey.h to set other flag values.

    // Set the public key dictionary.
    [publicKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecAttrIsPermanent];
    [publicKeyAttr setObject:publicTag forKey:(id)kSecAttrApplicationTag];
    // See SecKey.h to set other flag values.

    // Set attributes to top level dictionary.
    [keyPairAttr setObject:privateKeyAttr forKey:(id)kSecPrivateKeyAttrs];
    [keyPairAttr setObject:publicKeyAttr forKey:(id)kSecPublicKeyAttrs];

    // SecKeyGeneratePair returns the SecKeyRefs just for educational purposes.
    sanityCheck = SecKeyGeneratePair((CFDictionaryRef)keyPairAttr, &publicKeyRef, &privateKeyRef);
    LOGGING_FACILITY( sanityCheck == noErr && publicKeyRef != NULL && privateKeyRef != NULL, @"Something really bad went wrong with generating the key pair." );


    NSLog(@"getPublicKeyBits: %@", [self getPublicKeyBits]);

    NSLog(@"getPublicKeyExp: %@", [self getPublicKeyExp]);
    NSLog(@"getPublicKeyMod: %@", [self getPublicKeyMod]);


   // NSLog(@"keyPairAttr: %@" , keyPairAttr);
    [privateKeyAttr release];
    [publicKeyAttr release];
    [keyPairAttr release];
}

您正在设置的“公共和私有标记”只是标识符，如果您将密钥对存储在密钥链中，您可以稍后使用

SecItemCopyMatching

搜索这些标识符

不幸的是，您无法使用

SecKeyGeneratePair

或

SecKeyGeneratePairAsync

为非对称密钥对设置“种子”值。您将始终获得“随机生成”的密钥对

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如果您必须这样做，您必须查看提供该功能的其他库。

您能为iOS推荐任何库吗。Thanks@user2524377，我建议您先看看OpenSSL。难道您不能将私钥存储在密钥链中，然后从密钥链（如果存在）中检索它吗？能够生成相同的私钥两次似乎很奇怪。如果您可以随意生成相同的密钥，那么它就不是非常私有的。