Question

我在Java中有代码示例，我需要在C＃中使用相同的功能。是否有用于样本的类的替代方法？

import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.Signature;
import java.security.spec.X509EncodedKeySpec;
import javax.xml.bind.DatatypeConverter;

publicKey = publicKey.replaceAll("-----(BEGIN|END).*", "").trim();

X509EncodedKeySpec spec = new X509EncodedKeySpec(DatatypeConverter.parseBase64Binary(publicKey));
KeyFactory keyFactory = KeyFactory.getInstance("EC");
PublicKey pKey = keyFactory.generatePublic(spec);

Signature ecdsaSign = Signature.getInstance("SHA256withECDSA");
ecdsaSign.initVerify(pKey);
ecdsaSign.update(stringToVerify.getBytes("UTF-8"));

if (ecdsaSign.verify(new BigInteger(ECDSA, 16).toByteArray())) {
    // true
}

Answer 1

.NET（本身）中没有任何东西只能读取公钥结构。但是，如果您可以获得完整的证书，那么您可以在.NET 4.6.1中编写以下内容：

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;

namespace Demo
{
    public static class DemoClass
    {
        public static bool ECDsaSha256Verify(string pemCert, string data, byte[] signature)
        {
            using (var cert = new X509Certificate2(Encoding.ASCII.GetBytes(pemCert)))
            using (ECDsa ecdsa = cert.GetECDsaPublicKey())
            {
                if (ecdsa == null)
                {
                    throw new ArgumentException("Certificate does not have an ECDSA key.");
                }

                byte[] dataBytes = Encoding.UTF8.GetBytes(data);
                return ecdsa.VerifyData(dataBytes, signature, HashAlgorithmName.SHA256);
            }
        }
    }
}

我不确定你的BigInteger签名值来自哪里，所以我刚刚离开了一个字节数组。

C＃中的Java X509EncodedKeySpec

1 个答案: