Delphi DLL

SSH HSM Public Key Authentication

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Demonstrates how to authenticate with an SSH server using public key authentication using an HSM (USB token or smartcard). Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, SshKey, Pkcs11, Ssh, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
pkcs11: HCkPkcs11;
pin: PWideChar;
userType: Integer;
json: HCkJsonObject;
priv_handle: Cardinal;
pub_handle: Cardinal;
key: HCkSshKey;
keyType: PWideChar;
ssh: HCkSsh;

begin
success := False;

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

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, MacOs, and other supported operating systems.

pkcs11 := CkPkcs11_Create();

// This would be a path to a .dylib on MacOS, or a path to a .so shared lib on Linux.
CkPkcs11_putSharedLibPath(pkcs11,'C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll');
pin := '0000';
userType := 1;

// Establish a PKCS11 logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
success := CkPkcs11_QuickSession(pkcs11,userType,pin);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPkcs11__lastErrorText(pkcs11));
    Exit;
  end;

// Set PKCS11 attributes to find our desired private key object.
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'class','private_key');
CkJsonObject_UpdateString(json,'label','MySshKey');

// Get the PKCS11 handle to the private key located on the HSM.
priv_handle := CkPkcs11_FindObject(pkcs11,json);

// Get the PKCS11 handle to the corresponding public key located on the HSM.
CkJsonObject_UpdateString(json,'class','public_key');

pub_handle := CkPkcs11_FindObject(pkcs11,json);

key := CkSshKey_Create();
// The key type can be "rsa" or "ec"
keyType := 'rsa';
success := CkSshKey_UsePkcs11(key,pkcs11,priv_handle,pub_handle,keyType);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSshKey__lastErrorText(key));
    Exit;
  end;

ssh := CkSsh_Create();

success := CkSsh_Connect(ssh,'example.com',22);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh));
    Exit;
  end;

// Authenticate with the SSH server using the login and
// HSM private key.  (The corresponding public key should've 
// been installed on the SSH server beforehand.)
success := CkSsh_AuthenticatePk(ssh,'myLogin',key);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh));
    Exit;
  end;

Memo1.Lines.Add('Public-Key Authentication Successful!');

CkPkcs11_Dispose(pkcs11);
CkJsonObject_Dispose(json);
CkSshKey_Dispose(key);
CkSsh_Dispose(ssh);

end;