Dart Requires Chilkat v11.0.0+

Generate a CSR with SAN (Subject Alternative Name) Extension

See more CSR Examples

Demonstrates how to generate a private key and a Certificate Signing Request (CSR) that includes the SAN extension. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // First generate an RSA private key.
  // (It is also possible to create CSRs based on ECDSA private keys..)
  final rsa = CkRsa();

  // Generate a random 2048-bit RSA key.
  final privKey = CkPrivateKey();
  try {
    rsa.genKey(2048, privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Create the CSR object and set properties.
  final csr = CkCsr();

  // Specify the Common Name. 
  csr.commonName = 'mysubdomain.mydomain.com';

  // Country Name (2 letter code)
  csr.country = 'GB';

  // State or Province Name (full name)
  csr.state = 'Yorks';

  // Locality Name (eg, city)
  csr.locality = 'York';

  // Organization Name (eg, company)
  csr.company = 'Internet Widgits Pty Ltd';

  // Organizational Unit Name (eg, secion/division)
  csr.companyDivision = 'IT';

  // Email address
  csr.emailAddress = 'support@mydomain.com';

  // Add Subject Alternative Names
  // (The AddSan method is added in Chilkat v9.5.0.84)
  // Call AddSan for each alternative name.
  csr.addSan('dnsName', 'mydomain.com');
  csr.addSan('dnsName', 'mysubdomain.mydomain.com');
  csr.addSan('ipAddress', '192.168.0.123');

  // Create the CSR using the private key.
  final String pemStr;
  try {
    pemStr = csr.genCsrPem(privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Save the private key and CSR to a files.
  privKey.savePkcs8EncryptedPemFile('password', 'qa_output/privKey1.pem');

  final fac = CkFileAccess();
  fac.writeEntireTextFile('qa_output/csr1.pem', pemStr, 'utf-8', false);

  // Show the CSR.
  print(pemStr);

  // Sample output:

  // 	-----BEGIN CERTIFICATE REQUEST-----
  // 	MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
  // 	bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
  // 	HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxCzAJBgNVBAsMAklUMSMw
  // 	IQYJKoZIhvcNAQkBFhRzdXBwb3J0QG15ZG9tYWluLmNvbTCCASIwDQYJKoZIhvcN
  // 	AQEBBQADggEPADCCAQoCggEBALnQ0un/wF8whk+gPuiAlf3qvx14jgAOV6Erm6EB
  // 	H7WACPCpnKcm/8KP+7uoPiwRQaENhMeCgf45vcivl2p6aAn/spLXyEkXyw2d8wFb
  // 	YYAGRkiz4Xf7ASJiKuwcOtORz+sSDzgtdfokHfXU1cYeFE2yQhSdLUY5fMn425+g
  // 	KoEEsRSjSDe6AKru4+4iGNrLKd8pB9IA5/jOE139IkWlB9r5fEPD5bUTsgqXk9eb
  // 	68O0gc712V2eZK07N24lDmFC4bIMTD4csDWocR5hFHXj7NX7c8sOBDcpEb9mPIk4
  // 	elxubnhkfnjhOi4J3lDHcT/0ALnbLhf9LnaiKqs+5VcVZvECAwEAAaAAMA0GCSqG
  // 	SIb3DQEBBQUAA4IBAQC0AETLIcP3foh5nbu2hVFS8uCUNZ5hEIR1eXmYZmZoBQq2
  // 	26ZAoT4CZwixlggC+n7WvAXJ5Pzxpl4wLV4loTiQzaKPX1w0ERo5ZRwLy0n56oG2
  // 	6QG+WTViT1C8rlgtVwkCFNOXr0kSSRs8FdaPllqKxK1hxYSL7zwNpumsk39F2cDt
  // 	vhcekvH0V3BuGrQFm3dKN/0azW6GOod9+Vq4VzSyOe3kp15oxLBsZOFOu/REujcw
  // 	Tzu2jt1asQKUm60CZ9wNHpYepR0Ww40uP1slbehEaFDa6V8b60/tlHHmBbJ4/fy5
  // 	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
  // 	-----END CERTIFICATE REQUEST-----
}