NAME
POE::Component::SSLify - Makes using SSL in the world of POE easy!
VERSION
This document describes v1.004 of POE::Component::SSLify - released March 08, 2011 as part of POE-Component-SSLify.
SYNOPSIS
# CLIENT-side usage
# Import the module
use POE::Component::SSLify qw( Client_SSLify );
# Create a normal SocketFactory wheel and connect to a SSL-enabled server
my $factory = POE::Wheel::SocketFactory->new;
# Time passes, SocketFactory gives you a socket when it connects in SuccessEvent
# Convert the socket into a SSL socket POE can communicate with
my $socket = shift;
eval { $socket = Client_SSLify( $socket ) };
if ( $@ ) {
# Unable to SSLify it...
}
# Now, hand it off to ReadWrite
my $rw = POE::Wheel::ReadWrite->new(
Handle => $socket,
# other options as usual
);
# --------------------------------------------------------------------------- #
# SERVER-side usage
# !!! Make sure you have a public key + certificate
# excellent howto: http://www.akadia.com/services/ssh_test_certificate.html
# Import the module
use POE::Component::SSLify qw( Server_SSLify SSLify_Options );
# Set the key + certificate file
eval { SSLify_Options( 'server.key', 'server.crt' ) };
if ( $@ ) {
# Unable to load key or certificate file...
}
# Create a normal SocketFactory wheel to listen for connections
my $factory = POE::Wheel::SocketFactory->new;
# Time passes, SocketFactory gives you a socket when it gets a connection in SuccessEvent
# Convert the socket into a SSL socket POE can communicate with
my $socket = shift;
eval { $socket = Server_SSLify( $socket ) };
if ( $@ ) {
# Unable to SSLify it...
}
# Now, hand it off to ReadWrite
my $rw = POE::Wheel::ReadWrite->new(
Handle => $socket,
# other options as usual
);
DESCRIPTION
This component represents the standard way to do SSL in POE.
FUNCTIONS
Client_SSLify
This function sslifies a client-side socket. You can pass several
options to it:
my $socket = shift;
$socket = Client_SSLify( $socket, $version, $options, $ctx, $callback );
$socket is the non-ssl socket you got from somewhere ( required )
$version is the SSL version you want to use
$options is the SSL options you want to use
$ctx is the custom SSL context you want to use
$callback is the callback hook on success/failure of sslification
# This is an example of the callback and you should pass it as Client_SSLify( $socket, ... , \&callback );
sub callback {
my( $socket, $status, $errval ) = @_;
# $socket is the original sslified socket in case you need to play with it
# $status is either 1 or 0; with 1 signifying success and 0 failure
# $errval will be defined if $status == 0; it's the numeric SSL error code
# check http://www.openssl.org/docs/ssl/SSL_get_error.html for the possible error values ( and import them from Net::SSLeay! )
# The return value from the callback is discarded
}
If $ctx is defined, SSLify will ignore $version and $options. Otherwise,
it will be created from the $version and $options parameters. If all of
them are undefined, it will follow the defaults in
"SSLify_ContextCreate".
BEWARE: If you passed in a CTX, SSLify will do Net::SSLeay::CTX_free(
$ctx ) when the socket is destroyed. This means you cannot reuse
contexts!
NOTE: The way to have a client socket with proper certificates set up
is:
my $socket = shift; # get the socket from somewhere
my $ctx = SSLify_ContextCreate( 'server.key', 'server.crt' );
$socket = Client_SSLify( $socket, undef, undef, $ctx );
NOTE: You can pass the callback anywhere in the arguments, we'll figure
it out for you! If you want to call a POE event, please look into the
postback/callback stuff in POE::Session.
# we got this from POE::Wheel::SocketFactory
sub event_SuccessEvent {
my $socket = $_[ARG0];
$socket = Client_SSLify( $socket, $_[SESSION]->callback( 'sslify_result' ) );
$_[HEAP]->{client} = POE::Wheel::ReadWrite->new(
Handle => $socket,
...
);
return;
}
# the callback event
sub event_sslify_result {
my ($creation_args, $called_args) = @_[ARG0, ARG1];
my( $socket, $status, $errval ) = @$called_args;
if ( $status ) {
print "Yay, SSLification worked!";
} else {
print "Aw, SSLification failed with error $errval";
}
}
Server_SSLify
This function sslifies a server-side socket. You can pass several
options to it:
my $socket = shift;
$socket = Server_SSLify( $socket, $ctx, $callback );
$socket is the non-ssl socket you got from somewhere ( required )
$ctx is the custom SSL context you want to use; overrides the global ctx set in SSLify_Options
$callback is the callback hook on success/failure of sslification
BEWARE: "SSLify_Options" must be called first if you aren't passing a
$ctx. If you want to set some options per-connection, do this:
my $socket = shift; # get the socket from somewhere
my $ctx = SSLify_ContextCreate();
# set various options on $ctx as desired
$socket = Server_SSLify( $socket, $ctx );
NOTE: You can use "SSLify_GetCTX" to modify the global, and avoid doing
this on every connection if the options are the same...
Please look at "Client_SSLify" for more details on the callback hook.
SSLify_ContextCreate
Accepts some options, and returns a brand-new Net::SSLeay context object
( $ctx )
my $ctx = SSLify_ContextCreate( $key, $cert, $version, $options );
$key is the certificate key file
$cert is the certificate file
$version is the SSL version to use
$options is the SSL options to use
You can then call various Net::SSLeay methods on the context
my $mode = Net::SSLeay::CTX_get_mode( $ctx );
By default we don't use the SSL key + certificate files
By default we use the version: default. Known versions of the SSL
connection - look at <http://www.openssl.org/docs/ssl/SSL_CTX_new.html>
for more info.
* sslv2
* sslv3
* tlsv1
* sslv23
* default ( sslv23 )
By default we don't set any options - look at
<http://www.openssl.org/docs/ssl/SSL_CTX_set_options.html> for more
info.
SSLify_Options
Call this function to initialize the global server-side context object.
This will be the default context whenever you call "Server_SSLify"
without passing a custom context to it.
SSLify_Options( $key, $cert, $version, $options );
$key is the certificate key file ( required )
$cert is the certificate file ( required )
$version is the SSL version to use
$options is the SSL options to use
By default we use the version: default
By default we use the options: Net::SSLeay::OP_ALL
Please look at "SSLify_ContextCreate" for more info on the available
versions/options.
SSLify_GetCTX
Returns the actual Net::SSLeay context object in case you wanted to play
with it :)
If passed in a socket, it will return that socket's $ctx instead of the
global.
my $ctx = SSLify_GetCTX(); # get the one set via SSLify_Options
my $ctx = SSLify_GetCTX( $sslified_sock ); # get the one in the object
SSLify_GetCipher
Returns the cipher used by the SSLified socket
print "SSL Cipher is: " . SSLify_GetCipher( $sslified_sock ) . "\n";
NOTE: Doing this immediately after Client_SSLify or Server_SSLify will
result in "(NONE)" because the SSL handshake is not done yet. The socket
is nonblocking, so you will have to wait a little bit for it to get
ready.
apoc@blackhole:~/mygit/perl-poe-sslify/examples$ perl serverclient.pl
got connection from: 127.0.0.1 - commencing Server_SSLify()
SSLified: 127.0.0.1 cipher type: ((NONE))
Connected to server, commencing Client_SSLify()
SSLified the connection to the server
Connected to SSL server
Input: hola
got input from: 127.0.0.1 cipher type: (AES256-SHA) input: 'hola'
Got Reply: hola
Input: ^C
stopped at serverclient.pl line 126.
SSLify_GetSocket
Returns the actual socket used by the SSLified socket, useful for stuff
like getpeername()/getsockname()
print "Remote IP is: " . inet_ntoa( ( unpack_sockaddr_in( getpeername( SSLify_GetSocket( $sslified_sock ) ) ) )[1] ) . "\n";
SSLify_GetSSL
Returns the actual Net::SSLeay object so you can call methods on it
print Net::SSLeay::dump_peer_certificate( SSLify_GetSSL( $sslified_sock ) );
SSLify_GetStatus
Returns the status of the SSL negotiation/handshake/connection. See
<http://www.openssl.org/docs/ssl/SSL_connect.html#RETURN_VALUES> for
more info.
my $status = SSLify_GetStatus( $socket );
-1 = still in negotiation stage ( or error )
0 = internal SSL error, connection will be dead
1 = negotiation successful
NOTES
Socket methods doesn't work
The new socket this module gives you actually is tied socket magic, so
you cannot do stuff like getpeername() or getsockname(). The only way to
do it is to use "SSLify_GetSocket" and then operate on the socket it
returns.
Dying everywhere...
This module will die() if Net::SSLeay could not be loaded or it is not
the version we want. So, it is recommended that you check for errors and
not use SSL, like so:
eval { use POE::Component::SSLify };
if ( $@ ) {
$sslavailable = 0;
} else {
$sslavailable = 1;
}
# Make socket SSL!
if ( $sslavailable ) {
eval { $socket = POE::Component::SSLify::Client_SSLify( $socket ) };
if ( $@ ) {
# Unable to SSLify the socket...
}
}
$IGNORE_SSL_ERRORS
As of SSLify v1.003 you can override this variable to temporarily ignore
some SSL errors. This is useful if you are doing crazy things with the
underlying Net::SSLeay stuff and don't want to die. However, it won't
ignore all errors as some is still considered fatal. Here's an example:
{
local $POE::Component::SSLify::IGNORE_SSL_ERRORS=1;
my $ctx = SSLify_CreateContext(...);
#Some more stuff
}
OpenSSL functions
Theoretically you can do anything that Net::SSLeay exports from the
OpenSSL libs on the socket. However, I have not tested every possible
function against SSLify, so use them carefully!
Net::SSLeay::renegotiate
This function has been tested ( it's in "t/2_renegotiate.t" ) but it
doesn't work on FreeBSD! I tracked it down to this security advisory:
<http://security.freebsd.org/advisories/FreeBSD-SA-09:15.ssl.asc> which
explains it in detail. The test will skip this function if it detects
that you're on a broken system. However, if you have the updated OpenSSL
library that fixes this you can use it.
NOTE: Calling this means the callback function you passed in
"Client_SSLify" or "Server_SSLify" will not fire! If you need this
please let me know and we can come up with a way to make it work.
Upgrading a non-ssl socket to SSL
You can have a normal plaintext socket, and convert it to SSL anytime.
Just keep in mind that the client and the server must agree to sslify at
the same time, or they will be waiting on each other forever! See
"t/3_upgrade.t" for an example of how this works.
Downgrading a SSL socket to non-ssl
As of now this is unsupported. If you need this feature please let us
know and we'll work on it together!
MSWin32 is not supported
This module doesn't work on MSWin32 platforms at all ( XP, Vista, 7, etc
) because of some weird underlying fd issues. Since I'm not a windows
developer, I'm unable to fix this. However, it seems like Cygwin on
MSWin32 works just fine! Please help me fix this if you can, thanks!
EXPORT
Stuffs all of the functions in @EXPORT_OK so you have to request them
directly.
SEE ALSO
Please see those modules/websites for more information related to this
module.
* POE
* Net::SSLeay
SUPPORT
Perldoc
You can find documentation for this module with the perldoc command.
perldoc POE::Component::SSLify
Websites
The following websites have more information about this module, and may
be of help to you. As always, in addition to those websites please use
your favorite search engine to discover more resources.
* Search CPAN
<http://search.cpan.org/dist/POE-Component-SSLify>
* RT: CPAN's Bug Tracker
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=POE-Component-SSLify>
* AnnoCPAN: Annotated CPAN documentation
<http://annocpan.org/dist/POE-Component-SSLify>
* CPAN Ratings
<http://cpanratings.perl.org/d/POE-Component-SSLify>
* CPAN Forum
<http://cpanforum.com/dist/POE-Component-SSLify>
* CPANTS Kwalitee
<http://cpants.perl.org/dist/overview/POE-Component-SSLify>
* CPAN Testers Results
<http://cpantesters.org/distro/P/POE-Component-SSLify.html>
* CPAN Testers Matrix
<http://matrix.cpantesters.org/?dist=POE-Component-SSLify>
Email
You can email the author of this module at "APOCAL at cpan.org" asking
for help with any problems you have.
Internet Relay Chat
You can get live help by using IRC ( Internet Relay Chat ). If you don't
know what IRC is, please read this excellent guide:
<http://en.wikipedia.org/wiki/Internet_Relay_Chat>. Please be courteous
and patient when talking to us, as we might be busy or sleeping! You can
join those networks/channels and get help:
* irc.perl.org
You can connect to the server at 'irc.perl.org' and join this
channel: #perl-help then talk to this person for help: Apocalypse.
* irc.freenode.net
You can connect to the server at 'irc.freenode.net' and join this
channel: #perl then talk to this person for help: Apocal.
* irc.efnet.org
You can connect to the server at 'irc.efnet.org' and join this
channel: #perl then talk to this person for help: Ap0cal.
Bugs / Feature Requests
Please report any bugs or feature requests by email to
"bug-poe-component-sslify at rt.cpan.org", or through the web interface
at
<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=POE-Component-SSLify>.
You will be automatically notified of any progress on the request by the
system.
Source Code
The code is open to the world, and available for you to hack on. Please
feel free to browse it and play with it, or whatever. If you want to
contribute patches, please send me a diff or prod me to pull from your
repository :)
<http://github.com/apocalypse/perl-poe-sslify>
git clone git://github.com/apocalypse/perl-poe-sslify.git
AUTHOR
Apocalypse <APOCAL@cpan.org>
ACKNOWLEDGEMENTS
Original code is entirely Rocco Caputo ( Creator of POE ) -> I simply
packaged up the code into something everyone could use and accepted the burden
of maintaining it :)
From the PoCo::Client::HTTP code =]
# This code should probably become a POE::Kernel method,
# seeing as it's rather baroque and potentially useful in a number
# of places.
ASCENT also helped a lot with the nonblocking mode, without his hard
work this module would still be stuck in the stone age :)
A lot of people helped add various features/functions - please look at
the changelog for more detail.
COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Apocalypse.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
The full text of the license can be found in the LICENSE file included
with this distribution.
DISCLAIMER OF WARRANTY
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
NECESSARY SERVICING, REPAIR, OR CORRECTION.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE
TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
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