Question

我被要求根据canAuthenticateAgainstProtectionSpace中的已知值检查公钥（代理回调NSURLConnection）

这是我到目前为止所做的：

- (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>，它没有用处。

Answer 1

如果有人关心，解决方案是使用保存在捆绑包上的证书检查证书字节是否为字节。

- (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;
}

Answer 2

请注意，SecCertificateCopyData以“DER”形式，可分辨编码规则返回证书。因此，您需要将证书合并到您的应用程序中，而不是作为pem或任何格式。要使用openssl将证书转换为DER，请使用以下命令：openssl x509 -in server.crt -out server.der -outform DER

检查canAuthenticateAgainstProtectionSpace中的公钥

2 个答案: