Package list libpoe-component-sslify-perl / upstream/1.005
upstream/1.005

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NAME
    POE::Component::SSLify - Makes using SSL in the world of POE easy!

VERSION
      This document describes v1.005 of POE::Component::SSLify - released March 10, 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
    SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
    DAMAGES.