c# - rsacryptoserviceprovider.VerifyData 总是返回 false

Question

下面是我的 C# 程序，它验证来自使用 phpseclib 的 php 脚本的响应

static void Main(string[] args)
        {

            var payment =
                "VUQxMzE1MTg0OTk0MDM2MzIyMDJ8VDAwMDAxN0kxMFVEMTMxNTE4NDk5NDAzNjMyMjAyfDIwMTctMTAtMDd8MHxwYXltZW50IHN1Y2Nlc3NmdWx8MjAyNTQ=";
            var signature =
                "V0T9ZedZW8oB9uy4PazRIxWHvJ7rR+FVtnGjUy30mSKqgmEceZWE1aBvkQWeG4ERjAXHjsRge0D0MlHd9zvXjrLog+G5nWBHIu52O0srCd9d71JVztMQy8fV5oSnRPtlUpgdmn8QDnJ27XrbaHzNxnFyybTQhmbfxkT0oJ0MEOk=";

            var sigByte = Convert.FromBase64String(signature);
            var payBite = Convert.FromBase64String(payment);

            Verify(payBite, sigByte);
        }

        public static bool Verify(byte[] payment, byte[] signature)
        {
            var key = Resources.PublicKey;
            var cipher = Crypto.DecodeX509PublicKey(key);

            var res = cipher.VerifyData(payment, "SHA256", signature);
            return res;
        }

使用的公钥如下:

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDSiXzUuH9ePZgSLYrzZ0qhta25
HCb+WG48wIKUl+cQNC/Fl/KZG2cSwRXdo8KZLVWWO5qwzplfTWEylg4IqRA48rYY
f/b+Y7QhORKeAws4pttLZJBbh1mIbZ9HXfQ+zBjP+zfJZ1YjSFs2uZdwSt1itUcJ
/GQFct8GoUevNELG7wIDAQAB
-----END PUBLIC KEY-----

但验证方法似乎一直返回 false。知道为什么会这样。

相同的内容在供应商​​给我的 php 代码中有效

<?php
//load RSA library
include 'Crypt/RSA.php';
//initialize RSA
$rsa = new Crypt_RSA();
//decode & get POST parameters
$payment = base64_decode("VUQxMzE1MTg0OTk0MDM2MzIyMDJ8VDAwMDAxN0kxMFVEMTMxNTE4NDk5NDAzNjMyMjAyfDIwMTctMTAtMDd8MHxwYXltZW50IHN1Y2Nlc3NmdWx8MjAyNTQ=");
$signature = base64_decode("V0T9ZedZW8oB9uy4PazRIxWHvJ7rR+FVtnGjUy30mSKqgmEceZWE1aBvkQWeG4ERjAXHjsRge0D0MlHd9zvXjrLog+G5nWBHIu52O0srCd9d71JVztMQy8fV5oSnRPtlUpgdmn8QDnJ27XrbaHzNxnFyybTQhmbfxkT0oJ0MEOk=");

//load public key for signature matching
$publickey = "-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDSiXzUuH9ePZgSLYrzZ0qhta25
HCb+WG48wIKUl+cQNC/Fl/KZG2cSwRXdo8KZLVWWO5qwzplfTWEylg4IqRA48rYY
f/b+Y7QhORKeAws4pttLZJBbh1mIbZ9HXfQ+zBjP+zfJZ1YjSFs2uZdwSt1itUcJ
/GQFct8GoUevNELG7wIDAQAB
-----END PUBLIC KEY-----";
$rsa->loadKey($publickey);
//verify signature
$signature_status = $rsa->verify($payment, $signature);
//get payment response in segments
//payment format: order_id|order_refference_number|date_time_transaction|payment_gateway_used|status_code|comment;
$responseVariables = explode('|', $payment);       


    //display values
    echo $signature_status;

    echo '<br/>';
    var_dump($responseVariables);


?>  

知道我在这里做错了什么。我尝试在 C# 代码中传递“SHA512”、“MD5”，但仍然返回 false。

Answer 1

.NET 4.6+ 内置支持 PSS，但需要使用 RSACng 类(RSACryptoServiceProvider 基于的 CAPI 不提供它)。

public static bool Verify(byte[] payment, byte[] signature)
{
    var key = Resources.PublicKey;
    // Change the function this calls to return RSACng instead of RSACryptoServiceProvider.
    RSA cipher = Crypto.DecodeX509PublicKey(key);

    // or, failing being able to change it:
    RSA tmp = new RSACng();
    tmp.ImportParameters(cipher.ExportParameters(false));
    cipher = tmp;

    return cipher.VerifyData(
        payment,
        signature,
        HashAlgorithmName.SHA256,
        RSASignaturePadding.Pss);
 }