Provided by: libpoe-component-sslify-perl_1.008-1_all 
NAME
POE::Component::SSLify - Makes using SSL in the world of POE easy!
VERSION
This document describes v1.008 of POE::Component::SSLify - released May 04, 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_client.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
<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!
LOAD_SSL_ENGINES
OpenSSL supports loading ENGINEs to accelerate the crypto algorithms. SSLify v1.004
automatically loaded the engines, but there was some problems on certain platforms that
caused coredumps. A big shout-out to BinGOs and CPANTesters for catching this! It's now
disabled in v1.007 and you would need to explicitly enable it.
sub POE::Component::SSLify::LOAD_SSL_ENGINES () { 1 }
use POE::Component::SSLify qw( Client::SSLify );
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
The default CPAN search engine, useful to view POD in HTML format.
http://search.cpan.org/dist/POE-Component-SSLify <http://search.cpan.org/dist/POE-
Component-SSLify>
• RT: CPAN's Bug Tracker
The RT ( Request Tracker ) website is the default bug/issue tracking system for CPAN.
http://rt.cpan.org/NoAuth/Bugs.html?Dist=POE-Component-SSLify
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=POE-Component-SSLify>
• AnnoCPAN
The AnnoCPAN is a website that allows community annonations of Perl module
documentation.
http://annocpan.org/dist/POE-Component-SSLify <http://annocpan.org/dist/POE-Component-
SSLify>
• CPAN Ratings
The CPAN Ratings is a website that allows community ratings and reviews of Perl
modules.
http://cpanratings.perl.org/d/POE-Component-SSLify <http://cpanratings.perl.org/d/POE-
Component-SSLify>
• CPAN Forum
The CPAN Forum is a web forum for discussing Perl modules.
http://cpanforum.com/dist/POE-Component-SSLify <http://cpanforum.com/dist/POE-
Component-SSLify>
• CPANTS
The CPANTS is a website that analyzes the Kwalitee ( code metrics ) of a distribution.
http://cpants.perl.org/dist/overview/POE-Component-SSLify
<http://cpants.perl.org/dist/overview/POE-Component-SSLify>
• CPAN Testers
The CPAN Testers is a network of smokers who run automated tests on uploaded CPAN
distributions.
http://www.cpantesters.org/distro/P/POE-Component-SSLify
<http://www.cpantesters.org/distro/P/POE-Component-SSLify>
• CPAN Testers Matrix
The CPAN Testers Matrix is a website that provides a visual way to determine what
Perls/platforms PASSed for a distribution.
http://matrix.cpantesters.org/?dist=POE-Component-SSLify
<http://matrix.cpantesters.org/?dist=POE-Component-SSLify>
• CPAN Testers Dependencies
The CPAN Testers Dependencies is a website that shows a chart of the test results of
all dependencies for a distribution.
<http://deps.cpantesters.org/?module=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
<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 <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 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.