(Perl) SFTP Authentication using X.509 Certificates

See more SFTP Examples

Demonstrates how to authenticate with an SSH/SFTP server using an certificate's private key.

Note: See X.509v3 Certificates for SSH Authentication for more information.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$sftp = chilkat::CkSFtp->new();

$hostname = "sftp.example.com";
$port = 22;
$success = $sftp->Connect($hostname,$port);
if ($success != 1) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

# Load the cert + private key from a .pfx.
# Note: Chilkat provides methods for loading certs and private keys from many sources, including smart cards and USB tokens (HSM's)
$cert = chilkat::CkCert->new();
$success = $cert->LoadPfxFile("qa_data/pfx/example.pfx","pfx_password");
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

# Get the cert's private key (as PEM) to be used for SSH authentication.
# (The public key is installed on the server.)
$privKeyPem = $cert->getPrivateKeyPem();
if ($cert->get_LastMethodSuccess() == 0) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$key = chilkat::CkSshKey->new();

# Load a private key from a PEM string:
$success = $key->FromOpenSshPrivateKey($privKeyPem);
if ($success != 1) {
    print $key->lastErrorText() . "\r\n";
    exit;
}

# Authenticate with the SSH server.
$success = $sftp->AuthenticatePk("myLogin",$key);
if ($success != 1) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

print "Public-Key Authentication Successful!" . "\r\n";