Delphi DLL

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

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var
success: Boolean;
ssh: HCkSsh;
sshPort: Integer;
password: PWideChar;
privKey: HCkSshKey;
keyStr: PWideChar;

begin
success := False;

//  Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
//  BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
//  password, and the 3rd is an SshKey private key.

ssh := CkSsh_Create();

//  Connect to the SSH server.  Port 22 is the usual SSH port.
sshPort := 22;
success := CkSsh_Connect(ssh,'ssh.example.com',sshPort);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh));
    Exit;
  end;

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
password := 'mySshPassword';

//  Load the SSH private key.  LoadText reads the file's text, which is then imported.
privKey := CkSshKey_Create();
keyStr := CkSshKey__loadText(privKey,'qa_data/id_rsa');
if (CkSshKey_getLastMethodSuccess(privKey) = False) then
  begin
    Memo1.Lines.Add(CkSshKey__lastErrorText(privKey));
    Exit;
  end;
success := CkSshKey_FromOpenSshPrivateKey(privKey,keyStr);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSshKey__lastErrorText(privKey));
    Exit;
  end;

success := CkSsh_AuthenticatePwPk(ssh,'mySshLogin',password,privKey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSsh__lastErrorText(ssh));
    Exit;
  end;
Memo1.Lines.Add('Authenticated with password and private key.');

CkSsh_Disconnect(ssh);

CkSsh_Dispose(ssh);
CkSshKey_Dispose(privKey);