(Delphi ActiveX) SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

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
success: Integer;
json: TChilkatJsonObject;
crypt: TChilkatCrypt2;
ssLogin: TChilkatSecureString;
ssPassword: TChilkatSecureString;
sftp: TChilkatSFtp;

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

// Imagine we've previously saved our encrypted login and password within a JSON config file
// that contains this:

// {
//   "ssh_login": "2+qylFfC56Ck7OQQt/U2/w==",
//   "ssh_password": "5neIq9Jmn0E3p71N6Yc8TA=="
// }

json := TChilkatJsonObject.Create(Self);
json.LoadFile('qa_data/passwords/ssh.json');

crypt := TChilkatCrypt2.Create(Self);

// These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
crypt.CryptAlgorithm := 'aes';
crypt.CipherMode := 'cbc';
crypt.KeyLength := 128;
crypt.SetEncodedKey('000102030405060708090A0B0C0D0E0F','hex');
crypt.SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');
crypt.EncodingMode := 'base64';

ssLogin := TChilkatSecureString.Create(Self);
ssPassword := TChilkatSecureString.Create(Self);

// Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
// a randomly generated session key.)
crypt.DecryptSecureENC(json.StringOf('ssh_login'),ssLogin.ControlInterface);
crypt.DecryptSecureENC(json.StringOf('ssh_password'),ssPassword.ControlInterface);

sftp := TChilkatSFtp.Create(Self);

success := sftp.Connect('MY-SSH-SERVER-DOMAIN-OR-IP',22);
if (success <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

// Authenticate using secure strings
success := sftp.AuthenticateSecPw(ssLogin.ControlInterface,ssPassword.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('SFTP Authentication successful.');

sftp.Disconnect();
end;