private static X509Certificate createCertificate(
AsymmetricCipherKeyPair pair,
string country,
string organization,
string locality,
string state,
string emailAddress,
string commonName,
BigInteger serialNumber,
AsymmetricCipherKeyPair signer)
{
Hashtable attrs = new Hashtable();
attrs.Add(X509Name.C, country); // Country
attrs.Add(X509Name.O, organization); // Organization
attrs.Add(X509Name.L, locality); // Locality
attrs.Add(X509Name.ST, state); // State/Province
attrs.Add(X509Name.EmailAddress, emailAddress);
attrs.Add(X509Name.CN, commonName); // Common Name
// Create a certificate
X509V3CertificateGenerator certGen = new X509V3CertificateGenerator();
certGen.setSerialNumber(serialNumber);
certGen.setIssuerDN(new X509Name(attrs));
certGen.setNotBefore(DateTime.Today.Subtract(new TimeSpan(1, 0, 0, 0)));
certGen.setNotAfter(DateTime.Today.AddDays(365));
certGen.setSubjectDN(new X509Name(attrs));
certGen.setPublicKey(pair.getPublic());
certGen.setSignatureAlgorithm("SHA1WithRSAEncryption");
return(certGen.generateX509Certificate(signer.getPrivate()));
}
private X509Certificate generateCertificate(String country,
String organization, String locality, String stateOrProvince,
String emailAddress, String commonName, RSAKeyParameters privateKey,
RSAKeyParameters publicKey)
{
string dateString = DateTime.Now.ToString("yyyyMMddHHmmssfff", DateTimeFormatInfo.InvariantInfo);
BigInteger serialNumber = new BigInteger(dateString);
DateTime notBefore = DateTime.Today.AddDays(-1);
DateTime notAfter = DateTime.Today.AddDays(730);
Hashtable attrs = new Hashtable();
attrs.Add(X509Name.C, country); // Country
attrs.Add(X509Name.O, organization); // Organization
attrs.Add(X509Name.L, locality); // Locality
attrs.Add(X509Name.ST, stateOrProvince); // State/Province
attrs.Add(X509Name.EmailAddress, emailAddress);
attrs.Add(X509Name.CN, commonName); // Common Name
// Create a certificate
X509V3CertificateGenerator certGen = new X509V3CertificateGenerator();
certGen.setSerialNumber(serialNumber);
certGen.setIssuerDN(new X509Name(attrs));
certGen.setNotBefore(notBefore);
certGen.setNotAfter(notAfter);
certGen.setSubjectDN(new X509Name(attrs));
certGen.setPublicKey(publicKey);
certGen.setSignatureAlgorithm("SHA256WithRSAEncryption");
X509Certificate certificate = certGen
.generateX509Certificate(privateKey);
return(certificate);
}