Secure FTP with Client Certificate

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one.

Chilkat Module for Perl 5.8.*

Chilkat Module for Perl 5.10.*

use chilkat;

$ftp = new chilkat::CkFtp2();

#  Any string unlocks the component for the 1st 30-days.
$success = $ftp->UnlockComponent("Anything for 30-day trial");
if ($success != 1) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

#  You may use this account for testing.
#  This account allows for directory listings and files
#  to be downloaded.  However, file uploads are not allowed.
$ftp->put_Hostname("ftp.secureftp-test.com");
$ftp->put_Username("test");
$ftp->put_Password("test");

#  Establish an explicit secure channel after connection
#  on the standard FTP port 21.
$ftp->put_AuthTls(1);

#  The Ssl property is for establishing an implicit SSL connection
#  on port 990.  Do not set it.
$ftp->put_Ssl(0);

#  Load a certificate from a .pfx
#  A PFX may contain several certs, including the certificates
#  in a chain of authority.
$certStore = new chilkat::CkCertStore();

$password = "***";
#  Load the certs from a PFX into an in-memory certificate store:
$success = $certStore->LoadPfxFile("chilkat.pfx",$password);
if ($success != 1) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

#  Find the exact cert we'll use:

$cert = $certStore->FindCertBySubject("Chilkat Software, Inc.");
if ($cert eq null ) {
    print "Certificate not found!" . "\r\n";
    exit;
}

#  Use this certificate for our secure (SSL/TLS) connection:
$ftp->SetSslClientCert($cert);

#  Connect and login to the FTP server.  The connection is
#  made secure because of the AuthTls setting.
$success = $ftp->Connect();
if ($success != 1) {
    print $ftp->lastErrorText() . "\n";
    exit;
}
else {
    #  LastErrorText contains information even when
    #  successful. This allows you to visually verify
    #  that the secure connection actually occurred.
    print $ftp->lastErrorText() . "\r\n";
}

print "Secure FTP Channel Established!" . "\n";

#  Do whatever you're doing to do ...
#  upload files, download files, etc...

$ftp->Disconnect();

#  The LastErrorText provides a detailed log of the
#  SSL connection for both success and failed connections.
#  Here is an example of a successful connection.
#  The client certificate is logged as "ClientCertDN":

#  ChilkatLog:
#    Connect:
#      DllDate: Aug 15 2007
#      Hostname: ftp.secureftp-test.com
#      Port: 21
#      IdleTimeoutMs: 60000
#      ConnectTimeout: 60
#      HeartbeatMs: 0
#      initialStatus: 220
#      initialResponse: 220 FileZilla Server version 0.9.23 beta
#      converting to secure connection...
#      ClientCertDN: C=US, S=Illinois, L=Wheaton, O="Chilkat Software, Inc.", OU=Secure Application Development, CN="Chilkat Software, Inc."
#      SSL Server Certificate not verified.
#      ConnectionInfo:
#        protocol: TLS1
#        cipher: RC4
#        cipherStrength: 128
#        hash: MD5
#        hashStrength: 128
#        keyExchange: RSA
#        keyExchangeStrength: 1024
#      Secure Channel Established.
#      successfully converted to secure connection...
#      Features: 211-Features:
#   MDTM
#   REST STREAM
#   SIZE
#   MLST type*;size*;modify*;
#   MLSD
#   AUTH SSL
#   AUTH TLS
#   UTF8
#   CLNT
#   MFMT
#  211 End
#      Directory listings are utf-8
#      Logging in...
#      Username: test
#      Login successful.
#      Connect successful