Perl

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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Perl

use chilkat();

$success = 0;

#  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 = chilkat::CkSFtp->new();

#  Step 1: Connect the SSH transport.  Port 22 is the usual port.
$port = 22;
$success = $sftp->Connect("sftp.example.com",$port);
if ($success == 0) {
    print $sftp->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();
$keyText = $privKey->loadText("qa_data/id_rsa");
if ($privKey->get_LastMethodSuccess() == 0) {
    print $privKey->lastErrorText() . "\r\n";
    exit;
}

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

$success = $sftp->AuthenticatePwPk("mySshLogin",$password,$privKey);
if ($success == 0) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

#  Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
#  file or directory operations.
$success = $sftp->InitializeSftp();
if ($success == 0) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

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

$sftp->Disconnect();