CGI::Application::Plugin::ProtectCSRF - Plug-in protected from CSRF
1.01
use Your::App; use base qw(CGI::Application); use CGI::Application::Plugin::Session; # require!! use CGI::Application::Plugin::ProtectCSRF; sub input_form : PublishCSRFID { my $self = shift; do_something(); } sub finish : ProtectCSRF { my $self = shift; $self->clear_csrf_id; do_something(); }
CGI::Application::Plugin::ProtectCSRF is C::A::P protected from CSRF.
When CSRF is detected, Forbidden is returned and processing is interrupted.
PublishCSRFID is action publishes CSRF ticket. CSRF ticket is published when I define it as an attribute of runmode method publishing CSRF ticket, and it is saved in session. If there is form tag in HTML to display after the processing end, as for runmode method to publish, CSRF ticket is set automatically by hidden field
# publish CSRF ticket sub input_form : PublishCSRFID { my $self = shift; return <<HTML; <form action="foo" method="post"> <input type="text" name="name"> <input type="submit" value="submit!"> <input type="hidden" name="rm" value="finish"> </form> HTML } # display html source <form action="foo" method="post"> <input type="hidden" name="_csrf_id" value="random string" /> <- insert hidden field <input type="text" name="name"> <input type="submit" value="submit!"> <input type="hidden" name="rm" value="finish"> </form>
ProtectCSRF is action to protect from CSRF Attack. If session CSRF ticket does not accord with query CSRF ticket, application consideres it to be CSRF attack and refuse to access it. Carry out the processing that you want to perform after having carried out clear_csrf_id method when access it, and it was admitted.
sub finish : ProtectCSRF { my $self = shift; $self->clear_csrf_id; # require! There is not a meaning unless I do it do_something(); # The processing that you want to perform (DB processing etc) }
Get ticket for protect CSRF
Example:
sub input_form : PublishCSRFID { my $self = shift; my $csrf_id = $self->csrf_id; do_something(); }
Initialize ProtectCSRF
Option:
csrf_error_status : CSRF error status code (default: 200) csrf_error_mode : CSRF error runmode name (default: _csrf_error) csrf_error_tmpl : CSRF error display html. scalarref or filepath or filehandle (default: $CSRF_ERROR_TMPL - scalarref) csrf_error_tmpl_param : CSRF error display html parameter (for HTML::Template) csrf_id : CSRF ticket name (default: _csrf_id) csrf_post_only : CSRF protect runmode request method check(default:0 1:POST Only)
sub cgiapp_init { my $self = shift; $self->tmpl_path("/path/to/template"); $self->protect_csrf_config( csrf_error_status => 403, # change forbidden csrf_error_tmpl => "csrf_error.tmpl", csrf_error_tmpl_param => { TITLE => "CSRF ERROR", MESSAGE => "your access is csrf!"}, csrf_id => "ticket_id", csrf_post_only => 1 ); } # csrf_error.tmpl <html><head><title><TMPL_VAR NAME=TITLE ESCAPE=HTML></title></head> <body> <h1>CSRF Error</h1> <span style="color: red"><TMPL_VAR NAME=MESSAGE ESCAPE=HTML></span> </body> </html>
Clear csrfid. It is preferable to make it execute after processing ends.
Example :
sub cgiapp_init { my $self = shift; $self->protect_csrf_config; } sub input { my $self = shift; do_something(). # input form display.. } sub confirm : PublishCSRFID { my $self = shift; do_something(). # publish csrf_id and input check and confirm display.. } sub complete : ProtectCSRF { my $self = shift; $self->clear_csrf_id(1); # clear csrf_id for CSRF protect do_something(); # DB insert etc.. }
prerun callback
postrun callback
It has only the protection function of basic CSRF,and mount other security checks in the application, please.
Attribute::Handlers Carp CGI::Application CGI::Application::Plugin::Session Digest::SHA1 Exporter HTML::TokeParser
Akira Horimoto <kurt0027@gmail.com>
Copyright (C) 2006 - 2008 Akira Horimoto
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install CGI::Application::Plugin::ProtectCSRF, copy and paste the appropriate command in to your terminal.
cpanm
cpanm CGI::Application::Plugin::ProtectCSRF
CPAN shell
perl -MCPAN -e shell install CGI::Application::Plugin::ProtectCSRF
For more information on module installation, please visit the detailed CPAN module installation guide.