BouncyCastle私钥到X509Certificate2私钥

本文关键字：私钥 X509Certificate2 BouncyCastle | 更新日期: 2023-09-27 17:57:51

我使用BouncyCastle 创建证书

        var keypairgen = new RsaKeyPairGenerator();
        keypairgen.Init(new KeyGenerationParameters(new SecureRandom(new CryptoApiRandomGenerator()), 1024));
        var keypair = keypairgen.GenerateKeyPair();
        var gen = new X509V3CertificateGenerator();
        var CN = new X509Name("CN=" + certName);
        var SN = BigInteger.ProbablePrime(120, new Random());
        gen.SetSerialNumber(SN);
        gen.SetSubjectDN(CN);
        gen.SetIssuerDN(CN);
        gen.SetNotAfter(DateTime.Now.AddYears(1));
        gen.SetNotBefore(DateTime.Now.Subtract(new TimeSpan(7,0,0,0)));
        gen.SetSignatureAlgorithm("MD5WithRSA");
        gen.SetPublicKey(keypair.Public);
        gen.AddExtension( 
            X509Extensions.AuthorityKeyIdentifier.Id, 
            false, 
            new AuthorityKeyIdentifier( 
                SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(keypair.Public), 
                new GeneralNames(new GeneralName(CN)), 
                SN 
            )); 
        gen.AddExtension( 
            X509Extensions.ExtendedKeyUsage.Id, 
            false, 
            new ExtendedKeyUsage(new ArrayList() 
            { 
                new DerObjectIdentifier("1.3.6.1.5.5.7.3.1") 
            }));
        var newCert = gen.Generate(keypair.Private);

到此结束

X509Certificate2 certificate = new X509Certificate2(DotNetUtilities.ToX509Certificate((Org.BouncyCastle.X509.X509Certificate)newCert));

现在，由于我的任务告诉我要将Certificate和PrivateKey都存储在X509Certificate2对象中，所以我需要一种转换密钥对的方法。私人进入X509证书2.私人。有什么想法吗？

谢谢。

BouncyCastle私钥到X509Certificate2私钥

请详细说明，这是创建X509Certificate2证书后要添加的完整代码：

RSA rsaPriv = DotNetUtilities.ToRSA(keypair.Private as RsaPrivateCrtKeyParameters);
certificate.PrivateKey = rsaPriv;

（当然，这可以优化为一行。）

如果您查看这个问题中的链接，您应该能够使用类似于DotNetUtilities.ToRSA(...)的东西，并将其返回值放入X509Certificate2的PrivateKey中。

对于任何试图将X509Certificate2导出到PKCS12并保留私钥的人。这就是我必须做的：

        // Convert BouncyCastle X509 Certificate to .NET's X509Certificate
        var cert = DotNetUtilities.ToX509Certificate(certificate);
        var certBytes = cert.Export(X509ContentType.Pkcs12, "password");
        // Convert X509Certificate to X509Certificate2
        var cert2 = new X509Certificate2(certBytes, "password");
        // Convert BouncyCastle Private Key to RSA
        var rsaPriv = DotNetUtilities.ToRSA(issuerKeyPair.Private as RsaPrivateCrtKeyParameters);
        // Setup RSACryptoServiceProvider with "KeyContainerName" set
        var csp = new CspParameters();
        csp.KeyContainerName = "KeyContainer";
        var rsaPrivate = new RSACryptoServiceProvider(csp);
        // Import private key from BouncyCastle's rsa
        rsaPrivate.ImportParameters(rsaPriv.ExportParameters(true));
        // Set private key on our X509Certificate2
        cert2.PrivateKey = rsaPrivate;
        // Export Certificate with private key
        File.WriteAllBytes(@"C:'Temp'cert.pfx", cert2.Export(X509ContentType.Pkcs12, "password"));

我想分享我的方法：

pfx到System.Security.Cryptography.X509Certificates.X509Certificate2。

        public static X509Certificate2 OpenCertificate(string pfxPath, string contrasenia)
    {
        System.Security.Cryptography.X509Certificates.X509Certificate2 x509 = default(System.Security.Cryptography.X509Certificates.X509Certificate2);
        MemoryStream ms = new MemoryStream(File.ReadAllBytes(pfxPath));
        Org.BouncyCastle.Pkcs.Pkcs12Store st = new Org.BouncyCastle.Pkcs.Pkcs12Store(ms, contrasenia.ToCharArray());
        var alias = st.Aliases.Cast<string>().FirstOrDefault(p => st.IsCertificateEntry(p));
        Org.BouncyCastle.Pkcs.X509CertificateEntry keyEntryX = st.GetCertificate(alias);
        x509 = new System.Security.Cryptography.X509Certificates.X509Certificate2(DotNetUtilities.ToX509Certificate(keyEntryX.Certificate));
        alias = st.Aliases.Cast<string>().FirstOrDefault(p => st.IsKeyEntry(p));
        Org.BouncyCastle.Pkcs.AsymmetricKeyEntry keyEntry = st.GetKey(alias);
        System.Security.Cryptography.RSACryptoServiceProvider intermediateProvider = (System.Security.Cryptography.RSACryptoServiceProvider)Org.BouncyCastle.Security.DotNetUtilities.ToRSA((Org.BouncyCastle.Crypto.Parameters.RsaPrivateCrtKeyParameters)keyEntry.Key);
        x509.PrivateKey = intermediateProvider;
        return x509;
    }
相关文章：