Perl

SSH Authenticate with a SecureString Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticateSecPwPk method, which performs the same combined password/private-key authentication as AuthenticatePwPk but receives the username and password as SecureString objects. The third argument is the 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: This is the SecureString form of multi-factor SSH authentication: the password is held encrypted in memory and combined with a private key for servers that require both. It is the most protective option when a deployment mandates two-factor SSH and you also want to minimize plaintext credential exposure in the process.

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Perl

use chilkat();

$success = 0;

#  Demonstrates the Ssh.AuthenticateSecPwPk method, which authenticates using SecureString login
#  and password objects together with a private key.  The 1st argument is the username, the 2nd
#  is the password, and the 3rd is an SshKey private key.

$ssh = chilkat::CkSsh->new();

#  Connect to the SSH server.  Port 22 is the usual SSH port.
$sshPort = 22;
$success = $ssh->Connect("ssh.example.com",$sshPort);
if ($success == 0) {
    print $ssh->lastErrorText() . "\r\n";
    exit;
}

#  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 = chilkat::CkSshKey->new();
$keyStr = $privKey->loadText("qa_data/id_rsa");
if ($privKey->get_LastMethodSuccess() == 0) {
    print $privKey->lastErrorText() . "\r\n";
    exit;
}

$success = $privKey->FromOpenSshPrivateKey($keyStr);
if ($success == 0) {
    print $privKey->lastErrorText() . "\r\n";
    exit;
}

#  Place the login and password into SecureString objects.
$secureLogin = chilkat::CkSecureString->new();
$secureLogin->Append("mySshLogin");
$securePassword = chilkat::CkSecureString->new();
$securePassword->Append($password);

$success = $ssh->AuthenticateSecPwPk($secureLogin,$securePassword,$privKey);
if ($success == 0) {
    print $ssh->lastErrorText() . "\r\n";
    exit;
}

print "Authenticated." . "\r\n";

$ssh->Disconnect();