我们正在尝试使用C#和BouncyCastle库以编程方式生成X509证书(包括私钥)。我们尝试使用this sample by Felix Kollmann中的部分代码,但证书的私钥部分返回null。编码和单元测试情况如下:是否可以使用C#编程生成X509证书?
using System;
using System.Collections;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Prng;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.X509;
namespace MyApp
{
public class CertificateGenerator
{
/// <summary>
///
/// </summary>
/// <remarks>Based on <see cref="http://www.fkollmann.de/v2/post/Creating-certificates-using-BouncyCastle.aspx"/></remarks>
/// <param name="subjectName"></param>
/// <returns></returns>
public static byte[] GenerateCertificate(string subjectName)
{
var kpgen = new RsaKeyPairGenerator();
kpgen.Init(new KeyGenerationParameters(new SecureRandom(new CryptoApiRandomGenerator()), 1024));
var kp = kpgen.GenerateKeyPair();
var gen = new X509V3CertificateGenerator();
var certName = new X509Name("CN=" + subjectName);
var serialNo = BigInteger.ProbablePrime(120, new Random());
gen.SetSerialNumber(serialNo);
gen.SetSubjectDN(certName);
gen.SetIssuerDN(certName);
gen.SetNotAfter(DateTime.Now.AddYears(100));
gen.SetNotBefore(DateTime.Now.Subtract(new TimeSpan(7, 0, 0, 0)));
gen.SetSignatureAlgorithm("MD5WithRSA");
gen.SetPublicKey(kp.Public);
gen.AddExtension(
X509Extensions.AuthorityKeyIdentifier.Id,
false,
new AuthorityKeyIdentifier(
SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(kp.Public),
new GeneralNames(new GeneralName(certName)),
serialNo));
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(kp.Private);
return DotNetUtilities.ToX509Certificate(newCert).Export(System.Security.Cryptography.X509Certificates.X509ContentType.Pkcs12, "password");
}
}
}
单元测试:
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace MyApp
{
[TestClass]
public class CertificateGeneratorTests
{
[TestMethod]
public void GenerateCertificate_Test_ValidCertificate()
{
// Arrange
string subjectName = "test";
// Act
byte[] actual = CertificateGenerator.GenerateCertificate(subjectName);
// Assert
var cert = new X509Certificate2(actual, "password");
Assert.AreEqual("CN=" + subjectName, cert.Subject);
Assert.IsInstanceOfType(cert.PrivateKey, typeof(RSACryptoServiceProvider));
}
}
}
+1,很不错的解释。你看过PKCS#12规范吗?它是* BRUTAL *!我认为PKCS#12可以做任何事情;你不需要私钥。通常,PKCS#12用于保存私钥和相关证书,但还有其他可能性。 – 2010-09-22 22:46:21
为步骤3提供的链接似乎已关闭。值得庆幸的是,archive.org仍然包含以下内容:http://web.archive.org/web/20100504192226/http://www.fkollmann.de/v2/post/Creating-certificates-using-BouncyCastle。aspx – Kyle 2012-04-25 17:12:11
@Zenox,随时编辑我的答案并将其替换,这应该给你几点。 – Bruno 2012-04-25 17:18:07