我很感激我能在这个问题上提供的任何建议,它一直让我发疯,我找不到任何文档。我目前正在尝试使用满足某些要求(RSA 2048、SHA256 等)的单声道安全 API 在 C# 中生成自签名根证书。我已经成功地生成了一个满足所有这些要求的证书,但只有一个。
我正在尝试添加一个 CertificatePoliciesExtension 这些扩展通常在 X509 证书中格式化如下
[4]: ObjectId: 2.5.29.32 Criticality=false
CertificatePolicies [
[CertificatePolicyId: [some policy oid]
[PolicyQualifierInfo:
[qualifierID: some qualifier oid
qualifier: some ascii encoded byte stream]]]]
我的代码如下:
private void GenerateRootCertMono(RSACryptoServiceProvider rsa, byte[] serialNumber, string password)
{
// default values
string subject = "CN= company name";
string issuer = "CN=company name";
DateTime notBefore = DateTime.Now;
DateTime notAfter = new DateTime(643445675990000000); // 12/31/2039 23:59:59Z
X509CertificateBuilder cb = new X509CertificateBuilder(3);
cb.SerialNumber = serialNumber;
cb.IssuerName = issuer;
cb.NotBefore = notBefore;
cb.NotAfter = notAfter;
cb.SubjectName = subject;
cb.SubjectPublicKey = rsa;
// extensions
BasicConstraintsExtension bce = new BasicConstraintsExtension();
bce.CertificateAuthority = true;
cb.Extensions.Add(bce);
KeyUsageExtension kue = new KeyUsageExtension();
kue.KeyUsage = KeyUsages.digitalSignature ;
KeyUsageExtension kue1 = new KeyUsageExtension();
kue1.KeyUsage = KeyUsages.keyCertSign;
//my failed attempt to generate a simple Certificate Policy Extension
**ASN1 a = new ASN1 ();
a.Add(ASN1Convert.FromOid("2.5.29.32"));
a.Add(ASN1Convert.FromOid("some oid"));
a.Add(new ASN1 (System.Text.Encoding.ASCII.GetBytes("some text")));
CertificatePoliciesExtension pce = new CertificatePoliciesExtension(a);
cb.Extensions.Add(pce);
cb.Extensions.Add(kue);
cb.Extensions.Add(kue1);
// signature
cb.Hash = "SHA256";
byte[] rawcert = cb.Sign(rsa);
X509Certificate2 pfx = new X509Certificate2(rawcert);
pfx.PrivateKey = rsa;
this.PFX = pfx.Export(X509ContentType.Pkcs12, password);
return;
}
我知道生成这些扩展是可能的,因为我在其他证书中看到过它们。有没有人有任何经验或建议?如果有人知道如何在 C# 中使用 MSCAPI 生成这些扩展,我对 API 也很灵活,例如这也是一个可接受的解决方案。预先感谢您的任何帮助。