#!/usr/bin/perl -w

# sslecho.pl - Echo server using SSL

#

# Copyright (c) 1996,1998 Sampo Kellomaki <sampo@iki.fi>, All Rights Reserved.

# Date:   27.6.1996, 8.6.1998

# 7.12.2001, added more support for client side certificate testing --Sampo

# $Id: sslecho.pl,v 1.2 2001/12/08 17:43:14 sampo Exp $

#

# Usage: ./sslecho.pl *port* *cert.pem* *key.pem*

#

# This server always binds to localhost as this is all that is needed

# for tests.

die "Usage: ./sslecho.pl *port* *cert.pem* *key.pem*\n" unless $#ARGV == 2;

($port, $cert_pem, $key_pem) = @ARGV;

$our_ip = "\x7F\0\0\x01";

$trace = 2;

use Socket;

use Net::SSLeay qw(sslcat die_now die_if_ssl_error);

$Net::SSLeay::trace = 3; # Super verbose debugging

#

# Create the socket and open a connection

#

$our_serv_params = pack ('S n a4 x8', &AF_INET, $port, $our_ip);

socket (S, &AF_INET, &SOCK_STREAM, 0)  or die "socket: $!";

bind (S, $our_serv_params)             or die "bind:   $! (port=$port)";

listen (S, 5)                          or die "listen: $!";

#

# Prepare SSLeay

#

Net::SSLeay::load_error_strings();

Net::SSLeay::ERR_load_crypto_strings();

Net::SSLeay::SSLeay_add_ssl_algorithms();

Net::SSLeay::randomize();

print "sslecho: Creating SSL context...\n" if $trace>1;

$ctx = Net::SSLeay::CTX_new () or die_now("CTX_new ($ctx): $!\n");

print "sslecho: Setting cert and RSA key...\n" if $trace>1;

Net::SSLeay::CTX_set_cipher_list($ctx,'ALL');

Net::SSLeay::set_cert_and_key($ctx, $cert_pem, $key_pem) or die "key";

while (1) {

    print "sslecho $$: Accepting connections...\n" if $trace>1;

    ($addr = accept (NS, S)) or die "accept: $!";

    $old_out = select (NS); $| = 1; select ($old_out);  # Piping hot!

    if ($trace) {

	($af,$client_port,$client_ip) = unpack('S n a4 x8',$addr);

	@inetaddr = unpack('C4',$client_ip);

	print "$af connection from " . join ('.', @inetaddr)

	    . ":$client_port\n" if $trace;;

    }

    #

    # Do SSL negotiation stuff

    #

    print "sslecho: Creating SSL session (cxt=`$ctx')...\n" if $trace>1;

    $ssl = Net::SSLeay::new($ctx) or die_now("ssl new ($ssl): $!");

    print "sslecho: Setting fd (ctx $ctx, con $ssl)...\n" if $trace>1;

    Net::SSLeay::set_fd($ssl, fileno(NS));

    print "sslecho: Entering SSL negotiation phase...\n" if $trace>1;

    Net::SSLeay::accept($ssl);

    die_if_ssl_error("ssl_echo: ssl accept: ($!)");

    print "sslecho: Cipher `" . Net::SSLeay::get_cipher($ssl)

	. "'\n" if $trace;

    #

    # Connected. Exchange some data.

    #

    $got = Net::SSLeay::ssl_read_all($ssl) or die "$$: ssl read failed";

    print "sslecho $$: got " . length($got) . " bytes\n" if $trace==2;

    print "sslecho: Got `$got' (" . length ($got) . " chars)\n" if $trace>2;

    $got = uc $got;

    if ($got eq 'CLIENT-CERT-TEST') {

	$got .= Net::SSLeay::dump_peer_certificate($ssl) . "END CERT\n";

    }

    Net::SSLeay::ssl_write_all($ssl, $got) or die "$$: ssl write failed";

    $got = '';  # in case it was huge

    print "sslecho: Tearing down the connection.\n\n" if $trace>1;

    Net::SSLeay::free ($ssl);

    close NS;

}

Net::SSLeay::CTX_free ($ctx);

close S;

__END__