PHP

SFTP Authenticate with Password and Private Key

Demonstrates the Chilkat SFtp.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The arguments are the username, the password, and 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 deployments mandate two-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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Chilkat2 PHP

<?php

use Chilkat2\SFtp;
use Chilkat2\SshKey;

// Demonstrates the SFtp.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.

$sftp = new SFtp();

// Step 1: Connect the SSH transport.  Port 22 is the usual port.
$port = 22;
try {
    $sftp->Connect('sftp.example.com', $port);

    // 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 = new SshKey();
    $keyText = $privKey->LoadText('qa_data/id_rsa');

    $privKey->FromOpenSshPrivateKey($keyText);

    $sftp->AuthenticatePwPk('mySshLogin', $password, $privKey);

    // Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
    // file or directory operations.
    $sftp->InitializeSftp();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Authenticated with a password and a private key.\n";

$sftp->Disconnect();