(Delphi ActiveX) SSH Authentication using an SSH Certificate

See more SSH Examples

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://www.chilkatsoft.com/understanding_ssh_certificates.asp

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
sbSshCert: TChilkatStringBuilder;
success: Integer;
sbPrivKey: TChilkatStringBuilder;
key: TChilkatSshKey;
ssh: TChilkatSsh;
hostname: WideString;
port: Integer;

begin
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

sbSshCert := TChilkatStringBuilder.Create(Self);
success := sbSshCert.LoadFile('qa_data/sshCert/user_ecdsa_key-cert.pub','utf-8');
if (success = 0) then
  begin
    Memo1.Lines.Add('Failed to load user_ecdsa_key-cert.pub');
    Exit;
  end;

sbPrivKey := TChilkatStringBuilder.Create(Self);
success := sbPrivKey.LoadFile('qa_data/sshKeys/user_ecdsa_key','utf-8');
if (success = 0) then
  begin
    Memo1.Lines.Add('Failed to load user_ecdsa_key');
    Exit;
  end;

key := TChilkatSshKey.Create(Self);
// Provide the password if the user_ecdsa_key is stored in an encrypted format.
key.Password := 'secret';
success := key.FromOpenSshPrivateKey(sbPrivKey.GetAsString());
if (success = 0) then
  begin
    Memo1.Lines.Add(key.LastErrorText);
    Exit;
  end;

// Indicate that the SSH certificate is to be used for authentication.
// The UseSshCertificate method was added in Chilkat v11.0.0
key.UseSshCertificate(sbSshCert.GetAsString());

ssh := TChilkatSsh.Create(Self);

hostname := 'ssh.example.com';
port := 22;
success := ssh.Connect(hostname,port);
if (success <> 1) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

success := ssh.AuthenticatePk('myLogin',key.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Public-Key Authentication using an SSH Certificate was Successful!');
end;