(Delphi ActiveX) Generate DSA SSH Key

Generates a DSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY).

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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
key: TChilkatSshKey;
success: Integer;
numBits: Integer;
exportedKey: WideString;
exportEncrypted: Integer;

begin
key := TChilkatSshKey.Create(Self);

// numBits should be a minimum of 1024 and
// a multiple of 64.  Typical values are
// 1024 or 2048. 
numBits := 2048;
success := key.GenerateDsaKey(numBits);
if (success <> 1) then
  begin
    Memo1.Lines.Add('Invalid numBits passed to DSA key generation method.');
    Exit;
  end;

// Note: Generating a public/private key pair is CPU intensive
// and may take a short amount of time (more than few seconds,
// but less than a minute).

// Export the DSA private key to OpenSSH, PuTTY, and XML and save. 
exportEncrypted := 0;
exportedKey := key.ToOpenSshPrivateKey(exportEncrypted);
// Chilkat provides a SaveText method for convenience...
success := key.SaveText(exportedKey,'privkey_openssh_unencrypted.pem');

// Export with encryption to OpenSSH private key format:
key.Password := 'secret';
exportEncrypted := 1;
exportedKey := key.ToOpenSshPrivateKey(exportEncrypted);
success := key.SaveText(exportedKey,'privkey_openssh_encrypted.pem');

// Export the DSA private key to unencrypted PuTTY format:
exportEncrypted := 0;
exportedKey := key.ToPuttyPrivateKey(exportEncrypted);
success := key.SaveText(exportedKey,'privkey_putty_unencrypted.ppk');

// Export the DSA private key to encrypted PuTTY format:
key.Password := 'secret';
exportEncrypted := 1;
exportedKey := key.ToPuttyPrivateKey(exportEncrypted);
success := key.SaveText(exportedKey,'privkey_putty_encrypted.ppk');

// Export private key to XML:
exportedKey := key.ToXml();
success := key.SaveText(exportedKey,'privkey.xml');

// ----------------------------------------------------
// Now for the public key....
// ----------------------------------------------------

// The Secure Shell (SSH) Public Key File Format
// is documented in RFC 4716.
exportedKey := key.ToRfc4716PublicKey();
success := key.SaveText(exportedKey,'pubkey_rfc4716.pub');

// OpenSSH has a separate public-key file format, which 
// is also supported by Chilkat SshKey:
exportedKey := key.ToOpenSshPublicKey();
success := key.SaveText(exportedKey,'pubkey_openSsh.pub');

Memo1.Lines.Add('Finished.');
end;