(Delphi DLL) Generate a CSR with SAN (Subject Alternative Name) Extension

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

Note: This example requires Chilkat v9.5.0.84 or greater.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, FileAccess, PrivateKey, Rsa, Csr;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rsa: HCkRsa;
success: Boolean;
privKey: HCkPrivateKey;
csr: HCkCsr;
pemStr: PWideChar;
fac: HCkFileAccess;

begin
// Note: Requires Chilkat v9.5.0.84 or greater.

// 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..)
rsa := CkRsa_Create();

// Generate a random 2048-bit RSA key.
success := CkRsa_GenerateKey(rsa,2048);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRsa__lastErrorText(rsa));
    Exit;
  end;

// Get the private key
privKey := CkRsa_ExportPrivateKeyObj(rsa);

// Create the CSR object and set properties.
csr := CkCsr_Create();

// Specify the Common Name. 
CkCsr_putCommonName(csr,'mysubdomain.mydomain.com');

// Country Name (2 letter code)
CkCsr_putCountry(csr,'GB');

// State or Province Name (full name)
CkCsr_putState(csr,'Yorks');

// Locality Name (eg, city)
CkCsr_putLocality(csr,'York');

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

// Organizational Unit Name (eg, secion/division)
CkCsr_putCompanyDivision(csr,'IT');

// Email address
CkCsr_putEmailAddress(csr,'support@mydomain.com');

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

// Create the CSR using the private key.
pemStr := CkCsr__genCsrPem(csr,privKey);
if (CkCsr_getLastMethodSuccess(csr) <> True) then
  begin
    Memo1.Lines.Add(CkCsr__lastErrorText(csr));
    CkPrivateKey_Dispose(privKey);
    Exit;
  end;

// Save the private key and CSR to a files.
CkPrivateKey_SavePkcs8EncryptedPemFile(privKey,'password','qa_output/privKey1.pem');
CkPrivateKey_Dispose(privKey);

fac := CkFileAccess_Create();
CkFileAccess_WriteEntireTextFile(fac,'qa_output/csr1.pem',pemStr,'utf-8',False);

// Show the CSR.
Memo1.Lines.Add(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-----

CkRsa_Dispose(rsa);
CkCsr_Dispose(csr);
CkFileAccess_Dispose(fac);

end;