iphone - 在 canAuthenticateAgainstProtectionSpace 中检查公钥

Question

有人要求我根据 canAuthenticateAgainstProtectionSpace 中的已知值检查公钥( NSURLConnection 的委托(delegate)回调)

这是我目前所拥有的:

- (BOOL)connection:(NSURLConnection *)connection 
        canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace 
    {
        SecKeyRef publicKey = SecTrustCopyPublicKey([protectionSpace serverTrust]);

        NSLog(@"%@",SecTrustCopyPublicKey([protectionSpace serverTrust])); 
        return YES;
}

如何将公钥与已知值进行比较？

NSLog 产生:<SecKeyRef: 0x687c000>这没什么用。

Answer 1

如果有人关心，解决方案是使用保存在 bundle 中的证书逐字节检查证书。

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace 
{
    SecTrustRef trust = [protectionSpace serverTrust];

    SecCertificateRef certificate = SecTrustGetCertificateAtIndex(trust, 0);

    NSData* ServerCertificateData = (NSData*) SecCertificateCopyData(certificate);

    // Check if the certificate returned from the server is identical to the saved certificate in
    // the main bundle
    BOOL areCertificatesEqual = ([ServerCertificateData 
                                  isEqualToData:[MyClass getCertificate]]);

    [ServerCertificateData release];

    if (!areCertificatesEqual) 
    {    
        NSLog(@"Bad Certificate, canceling request");
        [connection cancel];
    }

    // If the certificates are not equal we should not talk to the server;
    return areCertificatesEqual;
}