#!/usr/bin/perl -w
#
# Copyright (c) 2007, Cameron Rich
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the axTLS project nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#
# Demonstrate the use of the axTLS library in Perl with a set of
# command-line parameters similar to openssl. In fact, openssl clients
# should be able to communicate with axTLS servers and visa-versa.
#
# This code has various bits enabled depending on the configuration. To enable
# the most interesting version, compile with the 'full mode' enabled.
#
# To see what options you have, run the following:
# > [perl] axssl s_server -?
# > [perl] axssl s_client -?
#
# The axtls/axtlsp shared libraries must be in the same directory or be found
# by the OS. axtlsp.pm must be in this directory or be in @INC.
#
# Under Win32, ActivePerl was used (see
# http://www.activestate.com/Products/ActivePerl/?mp=1)
#
use axtlsp;
use IO::Socket;
# To get access to Win32 file descriptor stuff
my $is_win32 = 0;
if ($^O eq "MSWin32")
{
eval("use Win32API::File 0.08 qw( :ALL )");
$is_win32 = 1;
}
use strict;
#
# Win32 has some problems with socket handles
#
sub get_native_sock
{
my ($sock) = @_;
return $is_win32 ? FdGetOsFHandle($sock) : $sock;
}
# print version?
if ($#ARGV == 0 && $ARGV[0] eq "version")
{
printf("axssl.pl ".axtlsp::ssl_version()."\n");
exit 0;
}
#
# Main entry point. Doesn't do much except works out whether we are a client
# or a server.
#
print_options($#ARGV > -1 ? $ARGV[0] : "")
if ($#ARGV < 0 || ($ARGV[0] ne "s_server" && $ARGV[0] ne "s_client"));
# Cygwin/Win32 issue - flush our output continuously
select STDOUT;
local $|=1;
my $build_mode = axtlsp::ssl_get_config($axtlsp::SSL_BUILD_MODE);
$ARGV[0] eq "s_server" ? do_server($build_mode) : do_client($build_mode);
#
# Implement the SSL server logic.
#
sub do_server
{
my ($build_mode) = @_;
my $i = 1;
my $port = 4433;
my $options = $axtlsp::SSL_DISPLAY_CERTS;
my $quiet = 0;
my $password = undef;
my $private_key_file = undef;
my $cert_size = axtlsp::ssl_get_config($axtlsp::SSL_MAX_CERT_CFG_OFFSET);
my $ca_cert_size = axtlsp::ssl_get_config(
$axtlsp::SSL_MAX_CA_CERT_CFG_OFFSET);
my @cert;
my @ca_cert;
while ($i <= $#ARGV)
{
if ($ARGV[$i] eq "-accept")
{
print_server_options($build_mode, $ARGV[$i]) if $i >= $#ARGV;
$port = $ARGV[++$i];
}
elsif ($ARGV[$i] eq "-quiet")
{
$quiet = 1;
$options &= ~$axtlsp::SSL_DISPLAY_CERTS;
}
elsif ($build_mode >= $axtlsp::SSL_BUILD_SERVER_ONLY)
{
if ($ARGV[$i] eq "-cert")
{
print_server_options($build_mode, $ARGV[$i])
if $i >= $#ARGV || $#cert >= $cert_size-1;
push @cert, $ARGV[++$i];
}
elsif ($ARGV[$i] eq "-key")
{
print_server_options($build_mode, $ARGV[$i]) if $i >= $#ARGV;
$private_key_file = $ARGV[++$i];
$options |= $axtlsp::SSL_NO_DEFAULT_KEY;
}
elsif ($ARGV[$i] eq "-pass")
{
print_server_options($build_mode, $ARGV[$i]) if $i >= $#ARGV;
$password = $ARGV[++$i];
}
elsif ($build_mode >= $axtlsp::SSL_BUILD_ENABLE_VERIFICATION)
{
if ($ARGV[$i] eq "-verify")
{
$options |= $axtlsp::SSL_CLIENT_AUTHENTICATION;
}
elsif ($ARGV[$i] eq "-CAfile")
{
print_server_options($build_mode, $ARGV[$i])
if $i >= $#ARGV || $#ca_cert >= $ca_cert_size-1;
push @ca_cert, $ARGV[++$i];
}
elsif ($build_mode == $axtlsp::SSL_BUILD_FULL_MODE)
{
if ($ARGV[$i] eq "-debug")
{
$options |= $axtlsp::SSL_DISPLAY_BYTES;
}
elsif ($ARGV[$i] eq "-state")
{
$options |= $axtlsp::SSL_DISPLAY_STATES;
}
elsif ($ARGV[$i] eq "-show-rsa")
{
$options |= $axtlsp::SSL_DISPLAY_RSA;
}
else
{
print_server_options($build_mode, $ARGV[$i]);
}
}
else
{
print_server_options($build_mode, $ARGV[$i]);
}
}
else
{
print_server_options($build_mode, $ARGV[$i]);
}
}
else
{
print_server_options($build_mode, $ARGV[$i]);
}
$i++;
}
# Create socket for incoming connections
my $server_sock = IO::Socket::INET->new(Proto => 'tcp',
LocalPort => $port,
Listen => 1,
Reuse => 1) or die $!;
###########################################################################
# This is where the interesting stuff happens. Up until now we've
# just been setting up sockets etc. Now we do the SSL handshake.
###########################################################################
my $ssl_ctx = axtlsp::ssl_ctx_new($options, $axtlsp::SSL_DEFAULT_SVR_SESS);
die "Error: Server context is invalid" if not defined $ssl_ctx;
if (defined $private_key_file)
{
my $obj_type = $axtlsp::SSL_OBJ_RSA_KEY;
$obj_type = $axtlsp::SSL_OBJ_PKCS8 if $private_key_file =~ /.p8$/;
$obj_type = $axtlsp::SSL_OBJ_PKCS12 if $private_key_file =~ /.p12$/;
die "Private key '$private_key_file' is undefined." if
axtlsp::ssl_obj_load($ssl_ctx, $obj_type,
$private_key_file, $password);
}
foreach (@cert)
{
die "Certificate '$_' is undefined."
if axtlsp::ssl_obj_load($ssl_ctx, $axtlsp::SSL_OBJ_X509_CERT,
$_, undef) != $axtlsp::SSL_OK;
}
foreach (@ca_cert)
{
die "Certificate '$_' is undefined."
if axtlsp::ssl_obj_load($ssl_ctx, $axtlsp::SSL_OBJ_X509_CACERT,
$_, undef) != $axtlsp::SSL_OK;
}
for (;;)
{
printf("ACCEPT\n") if not $quiet;
my $client_sock = $server_sock->accept;
my $native_sock = get_native_sock($client_sock->fileno);
# This doesn't work in Win32 - need to get file descriptor from socket.
my $ssl = axtlsp::ssl_server_new($ssl_ctx, $native_sock);
# do the actual SSL handshake
my $res;
my $buf;
my $connected = 0;
while (1)
{
($res, $buf) = axtlsp::ssl_read($ssl, undef);
last if $res < $axtlsp::SSL_OK;
if ($res == $axtlsp::SSL_OK) # connection established and ok
{
if (axtlsp::ssl_handshake_status($ssl) == $axtlsp::SSL_OK)
{
if (!$quiet && !$connected)
{
display_session_id($ssl);
display_cipher($ssl);
}
$connected = 1;
}
}
if ($res > $axtlsp::SSL_OK)
{
printf($$buf);
}
elsif ($res < $axtlsp::SSL_OK)
{
axtlsp::ssl_display_error($res) if not $quiet;
last;
}
}
# client was disconnected or the handshake failed.
printf("CONNECTION CLOSED\n") if not $quiet;
axtlsp::ssl_free($ssl);
$client_sock->close;
}
axtlsp::ssl_ctx_free($ssl_ctx);
}
#
# Implement the SSL client logic.
#
sub do_client
{
my ($build_mode) = @_;
my $i = 1;
my $port = 4433;
my $options = $axtlsp::SSL_SERVER_VERIFY_LATER|$axtlsp::SSL_DISPLAY_CERTS;
my $private_key_file = undef;
my $reconnect = 0;
my $quiet = 0;
my $password = undef;
my @session_id;
my $host = "127.0.0.1";
my @cert;
my @ca_cert;
my $cert_size = axtlsp::ssl_get_config(
$axtlsp::SSL_MAX_CERT_CFG_OFFSET);
my $ca_cert_size = axtlsp::ssl_get_config(
$axtlsp::SSL_MAX_CA_CERT_CFG_OFFSET);
while ($i <= $#ARGV)
{
if ($ARGV[$i] eq "-connect")
{
print_client_options($build_mode, $ARGV[$i]) if $i >= $#ARGV;
($host, $port) = split(':', $ARGV[++$i]);
}
elsif ($ARGV[$i] eq "-cert")
{
print_client_options($build_mode, $ARGV[$i])
if $i >= $#ARGV || $#cert >= $cert_size-1;
push @cert, $ARGV[++$i];
}
elsif ($ARGV[$i] eq "-key")
{
print_client_options($build_mode, $ARGV[$i]) if $i >= $#ARGV;
$private_key_file = $ARGV[++$i];
$options |= $axtlsp::SSL_NO_DEFAULT_KEY;
}
elsif ($ARGV[$i] eq "-CAfile")
{
print_client_options($build_mode, $ARGV[$i])
if $i >= $#ARGV || $#ca_cert >= $ca_cert_size-1;
push @ca_cert, $ARGV[++$i];
}
elsif ($ARGV[$i] eq "-verify")
{
$options &= ~$axtlsp::SSL_SERVER_VERIFY_LATER;
}
elsif ($ARGV[$i] eq "-reconnect")
{
$reconnect = 4;
}
elsif ($ARGV[$i] eq "-quiet")
{
$quiet = 1;
$options &= ~$axtlsp::SSL_DISPLAY_CERTS;
}
elsif ($ARGV[$i] eq "-pass")
{
print_server_options($build_mode, $ARGV[$i]) if $i >= $#ARGV;
$password = $ARGV[++$i];
}
elsif ($build_mode == $axtlsp::SSL_BUILD_FULL_MODE)
{
if ($ARGV[$i] eq "-debug")
{
$options |= $axtlsp::SSL_DISPLAY_BYTES;
}
elsif ($ARGV[$i] eq "-state")
{
$options |= $axtlsp::SSL_DISPLAY_STATES;
}
elsif ($ARGV[$i] eq "-show-rsa")
{
$options |= $axtlsp::SSL_DISPLAY_RSA;
}
else # don't know what this is
{
print_client_options($build_mode, $ARGV[$i]);
}
}
else # don't know what this is
{
print_client_options($build_mode, $ARGV[$i]);
}
$i++;
}
my $client_sock = new IO::Socket::INET (
PeerAddr => $host, PeerPort => $port, Proto => 'tcp')
|| die ("no socket: $!");
my $ssl;
my $res;
my $native_sock = get_native_sock($client_sock->fileno);
printf("CONNECTED\n") if not $quiet;
###########################################################################
# This is where the interesting stuff happens. Up until now we've
# just been setting up sockets etc. Now we do the SSL handshake.
###########################################################################
my $ssl_ctx = axtlsp::ssl_ctx_new($options, $axtlsp::SSL_DEFAULT_CLNT_SESS);
die "Error: Client context is invalid" if not defined $ssl_ctx;
if (defined $private_key_file)
{
my $obj_type = $axtlsp::SSL_OBJ_RSA_KEY;
$obj_type = $axtlsp::SSL_OBJ_PKCS8 if $private_key_file =~ /.p8$/;
$obj_type = $axtlsp::SSL_OBJ_PKCS12 if $private_key_file =~ /.p12$/;
die "Private key '$private_key_file' is undefined." if
axtlsp::ssl_obj_load($ssl_ctx, $obj_type,
$private_key_file, $password);
}
foreach (@cert)
{
die "Certificate '$_' is undefined."
if axtlsp::ssl_obj_load($ssl_ctx, $axtlsp::SSL_OBJ_X509_CERT,
$_, undef) != $axtlsp::SSL_OK;
}
foreach (@ca_cert)
{
die "Certificate '$_' is undefined."
if axtlsp::ssl_obj_load($ssl_ctx, $axtlsp::SSL_OBJ_X509_CACERT,
$_, undef) != $axtlsp::SSL_OK;
}
# Try session resumption?
if ($reconnect)
{
my $session_id = undef;
my $sess_id_size = 0;
while ($reconnect--)
{
$ssl = axtlsp::ssl_client_new($ssl_ctx, $native_sock,
$session_id, $sess_id_size);
$res = axtlsp::ssl_handshake_status($ssl);
if ($res != $axtlsp::SSL_OK)
{
axtlsp::ssl_display_error($res) if !$quiet;
axtlsp::ssl_free($ssl);
exit 1;
}
display_session_id($ssl);
$session_id = axtlsp::ssl_get_session_id($ssl);
if ($reconnect)
{
axtlsp::ssl_free($ssl);
$client_sock->close;
$client_sock = new IO::Socket::INET (
PeerAddr => $host, PeerPort => $port, Proto => 'tcp')
|| die ("no socket: $!");
}
}
}
else
{
$ssl = axtlsp::ssl_client_new($ssl_ctx, $native_sock, undef, 0);
}
# check the return status
$res = axtlsp::ssl_handshake_status($ssl);
if ($res != $axtlsp::SSL_OK)
{
axtlsp::ssl_display_error($res) if not $quiet;
exit 1;
}
if (!$quiet)
{
my $common_name = axtlsp::ssl_get_cert_dn($ssl,
$axtlsp::SSL_X509_CERT_COMMON_NAME);
printf("Common Name:\t\t\t%s\n", $common_name) if defined $common_name;
display_session_id($ssl);
display_cipher($ssl);
}
while (<STDIN>)
{
my $cstring = pack("a*x", $_); # add null terminator
$res = axtlsp::ssl_write($ssl, \$cstring, length($cstring));
if ($res < $axtlsp::SSL_OK)
{
axtlsp::ssl_display_error($res) if not $quiet;
last;
}
}
axtlsp::ssl_ctx_free($ssl_ctx);
$client_sock->close;
}
#
# We've had some sort of command-line error. Print out the basic options.
#
sub print_options
{
my ($option) = @_;
printf("axssl: Error: '%s' is an invalid command.\n", $option);
printf("usage: axssl [s_server|s_client|version] [args ...]\n");
exit 1;
}
#
# We've had some sort of command-line error. Print out the server options.
#
sub print_server_options
{
my ($build_mode, $option) = @_;
my $cert_size = axtlsp::ssl_get_config($axtlsp::SSL_MAX_CERT_CFG_OFFSET);
my $ca_cert_size = axtlsp::ssl_get_config(
$axtlsp::SSL_MAX_CA_CERT_CFG_OFFSET);
printf("unknown option %s\n", $option);
printf("usage: s_server [args ...]\n");
printf(" -accept arg\t- port to accept on (default is 4433)\n");
printf(" -quiet\t\t- No server output\n");
if ($build_mode >= $axtlsp::SSL_BUILD_SERVER_ONLY)
{
printf(" -cert arg\t- certificate file to add (in addition to default)".
" to chain -\n".
"\t\t Can repeat up to %d times\n", $cert_size);
printf(" -key arg\t- Private key file to use - default DER format\n");
printf(" -pass\t\t- private key file pass phrase source\n");
}
if ($build_mode >= $axtlsp::SSL_BUILD_ENABLE_VERIFICATION)
{
printf(" -verify\t- turn on peer certificate verification\n");
printf(" -CAfile arg\t- Certificate authority - default DER format\n");
printf("\t\t Can repeat up to %d times\n", $ca_cert_size);
}
if ($build_mode == $axtlsp::SSL_BUILD_FULL_MODE)
{
printf(" -debug\t\t- Print more output\n");
printf(" -state\t\t- Show state messages\n");
printf(" -show-rsa\t- Show RSA state\n");
}
exit 1;
}
#
# We've had some sort of command-line error. Print out the client options.
#
sub print_client_options
{
my ($build_mode, $option) = @_;
my $cert_size = axtlsp::ssl_get_config($axtlsp::SSL_MAX_CERT_CFG_OFFSET);
my $ca_cert_size = axtlsp::ssl_get_config(
$axtlsp::SSL_MAX_CA_CERT_CFG_OFFSET);
printf("unknown option %s\n", $option);
if ($build_mode >= $axtlsp::SSL_BUILD_ENABLE_CLIENT)
{
printf("usage: s_client [args ...]\n");
printf(" -connect host:port - who to connect to (default ".
"is localhost:4433)\n");
printf(" -verify\t- turn on peer certificate verification\n");
printf(" -cert arg\t- certificate file to use - default DER format\n");
printf(" -key arg\t- Private key file to use - default DER format\n");
printf("\t\t Can repeat up to %d times\n", $cert_size);
printf(" -CAfile arg\t- Certificate authority - default DER format\n");
printf("\t\t Can repeat up to %d times\n", $ca_cert_size);
printf(" -quiet\t\t- No client output\n");
printf(" -pass\t\t- private key file pass phrase source\n");
printf(" -reconnect\t- Drop and re-make the connection ".
"with the same Session-ID\n");
if ($build_mode == $axtlsp::SSL_BUILD_FULL_MODE)
{
printf(" -debug\t\t- Print more output\n");
printf(" -state\t\t- Show state messages\n");
printf(" -show-rsa\t- Show RSA state\n");
}
}
else
{
printf("Change configuration to allow this feature\n");
}
exit 1;
}
#
# Display what cipher we are using
#
sub display_cipher
{
my ($ssl) = @_;
printf("CIPHER is ");
my $cipher_id = axtlsp::ssl_get_cipher_id($ssl);
if ($cipher_id == $axtlsp::SSL_AES128_SHA)
{
printf("AES128-SHA");
}
elsif ($cipher_id == $axtlsp::SSL_AES256_SHA)
{
printf("AES256-SHA");
}
elsif ($axtlsp::SSL_RC4_128_SHA)
{
printf("RC4-SHA");
}
elsif ($axtlsp::SSL_RC4_128_MD5)
{
printf("RC4-MD5");
}
else
{
printf("Unknown - %d", $cipher_id);
}
printf("\n");
}
#
# Display what session id we have.
#
sub display_session_id
{
my ($ssl) = @_;
my $session_id = axtlsp::ssl_get_session_id($ssl);
if (length($$session_id) > 0)
{
printf("-----BEGIN SSL SESSION PARAMETERS-----\n");
printf(unpack("H*", $$session_id));
printf("\n-----END SSL SESSION PARAMETERS-----\n");
}
}
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