Perl Requires Chilkat v11.0.0+

Accept TLS Connection with Client Authentication

See more Socket/SSL/TLS Examples

Demonstrates how to accept a TLS connection requiring client authentication. This is the case where the TLS client sends a certificate. It is also known as "Two-Way SSL". Perl

use chilkat();

$success = 0;

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

$listenSslSocket = chilkat::CkSocket->new();

#  An SSL/TLS server needs a digital certificate.  This example loads it from a PFX file.
#  Note: This is the server's certificate.

$cert = chilkat::CkCert->new();
#  The 1st argument is the file path, the 2nd arg is the 
#  PFX file's password:
$success = $cert->LoadPfxFile("chilkat.pfx","test");
if ($success == 0) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

#  To accept client client certificates in the TLS handshake,
#  we must indicate a list of acceptable client certificate root CA DN's
#  that are allowed.  (DN is an acronym for Distinguished Name.)
#  Call AddSslAcceptableClientCaDn once for each acceptable CA DN.
#  Here are a few examples so you can see the general format of a DN.
$listenSslSocket->AddSslAcceptableClientCaDn("C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root");
$listenSslSocket->AddSslAcceptableClientCaDn("O=Digital Signature Trust Co., CN=DST Root CA X3");

#  Use the certificate:
$success = $listenSslSocket->InitSslServer($cert);
if ($success == 0) {
    print $listenSslSocket->lastErrorText() . "\r\n";
    exit;
}

#  Bind and listen on a port:
$myPort = 8123;
#  Allow for a max of 5 queued connect requests.
$backLog = 5;
$success = $listenSslSocket->BindAndListen($myPort,$backLog);
if ($success == 0) {
    print $listenSslSocket->lastErrorText() . "\r\n";
    exit;
}

#  If accepting an SSL/TLS connection, the SSL handshake is part of the connection
#  establishment process. This involves a few back-and-forth messages between the 
#  client and server to establish algorithms and a shared key to create the secure 
#  channel. The sending and receiving of these messages are governed by the 
#  MaxReadIdleMs and MaxSendIdleMs properties. If these properties are set to 0 
#  (and this is the default unless changed by your application), then the 
#  AcceptNext can hang indefinitely during the SSL handshake process. 
#  Make sure these properties are set to appropriate values before calling AcceptNext.

#  Set a 10 second max for waiting to read/write.  This is for the SSL/TLS handshake establishment.
$listenSslSocket->put_MaxReadIdleMs(10000);
$listenSslSocket->put_MaxSendIdleMs(10000);

#  Accept a single client connection and establish the secure SSL/TLS channel:
$maxWaitMillisec = 20000;
$clientSock = chilkat::CkSocket->new();
$success = $listenSslSocket->AcceptNext($maxWaitMillisec,$clientSock);
if ($success == 0) {
    print $listenSslSocket->lastErrorText() . "\r\n";
    exit;
}

#  The client (in this example) is going to send a "Hello Server! -EOM-" 
#  message.  Read it:
$receivedMsg = $clientSock->receiveUntilMatch("-EOM-");
if ($clientSock->get_LastMethodSuccess() == 0) {
    print $clientSock->lastErrorText() . "\r\n";
    exit;
}

print $receivedMsg . "\r\n";

#  Send a "Hello Client! -EOM-" message:
$success = $clientSock->SendString("Hello Client! -EOM-");
if ($success == 0) {
    print $clientSock->lastErrorText() . "\r\n";
    exit;
}

#  Close the connection with the client
#  Wait a max of 20 seconds (20000 millsec)
$success = $clientSock->Close(20000);