init III
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211
Perl OTRS/Kernel/cpan-lib/LWP/Protocol/https.pm
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211
Perl OTRS/Kernel/cpan-lib/LWP/Protocol/https.pm
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package LWP::Protocol::https;
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use strict;
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our $VERSION = "6.06";
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require LWP::Protocol::http;
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our @ISA = qw(LWP::Protocol::http);
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require Net::HTTPS;
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sub socket_type
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{
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return "https";
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}
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sub _extra_sock_opts
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{
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my $self = shift;
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my %ssl_opts = %{$self->{ua}{ssl_opts} || {}};
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if (delete $ssl_opts{verify_hostname}) {
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$ssl_opts{SSL_verify_mode} ||= 1;
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$ssl_opts{SSL_verifycn_scheme} = 'www';
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}
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else {
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$ssl_opts{SSL_verify_mode} = 0;
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}
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if ($ssl_opts{SSL_verify_mode}) {
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unless (exists $ssl_opts{SSL_ca_file} || exists $ssl_opts{SSL_ca_path}) {
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eval {
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require Mozilla::CA;
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};
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if ($@) {
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if ($@ =! /^Can't locate Mozilla\/CA\.pm/) {
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$@ = <<'EOT';
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Can't verify SSL peers without knowing which Certificate Authorities to trust
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This problem can be fixed by either setting the PERL_LWP_SSL_CA_FILE
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environment variable or by installing the Mozilla::CA module.
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To disable verification of SSL peers set the PERL_LWP_SSL_VERIFY_HOSTNAME
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environment variable to 0. If you do this you can't be sure that you
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communicate with the expected peer.
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EOT
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}
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die $@;
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}
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$ssl_opts{SSL_ca_file} = Mozilla::CA::SSL_ca_file();
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}
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}
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$self->{ssl_opts} = \%ssl_opts;
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return (%ssl_opts, $self->SUPER::_extra_sock_opts);
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}
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#------------------------------------------------------------
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# _cn_match($common_name, $san_name)
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# common_name: an IA5String
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# san_name: subjectAltName
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# initially we were only concerned with the dNSName
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# and the 'left-most' only wildcard as noted in
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# https://tools.ietf.org/html/rfc6125#section-6.4.3
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# this method does not match any wildcarding in the
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# domain name as listed in section-6.4.3.3
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#
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sub _cn_match {
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my( $me, $common_name, $san_name ) = @_;
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# /CN has a '*.' prefix
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# MUST be an FQDN -- fishing?
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return 0 if( $common_name =~ /^\*\./ );
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my $re = q{}; # empty string
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# turn a leading "*." into a regex
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if( $san_name =~ /^\*\./ ) {
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$san_name =~ s/\*//;
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$re = "[^.]+";
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}
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# quotemeta the rest and match anchored
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if( $common_name =~ /^$re\Q$san_name\E$/ ) {
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return 1;
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}
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return 0;
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}
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#-------------------------------------------------------
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# _in_san( cn, cert )
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# 'cn' of the form /CN=host_to_check ( "Common Name" form )
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# 'cert' any object that implements a peer_certificate('subjectAltNames') method
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# which will return an array of ( type-id, value ) pairings per
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# http://tools.ietf.org/html/rfc5280#section-4.2.1.6
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# if there is no subjectAltNames there is nothing more to do.
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# currently we have a _cn_match() that will allow for simple compare.
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sub _in_san
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{
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my($me, $cn, $cert) = @_;
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# we can return early if there are no SAN options.
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my @sans = $cert->peer_certificate('subjectAltNames');
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return unless scalar @sans;
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(my $common_name = $cn) =~ s/.*=//; # strip off the prefix.
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# get the ( type-id, value ) pairwise
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# currently only the basic CN to san_name check
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while( my ( $type_id, $value ) = splice( @sans, 0, 2 ) ) {
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return 'ok' if $me->_cn_match($common_name,$value);
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}
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return;
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}
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sub _check_sock
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{
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my($self, $req, $sock) = @_;
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my $check = $req->header("If-SSL-Cert-Subject");
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if (defined $check) {
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my $cert = $sock->get_peer_certificate ||
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die "Missing SSL certificate";
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my $subject = $cert->subject_name;
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unless ( $subject =~ /$check/ ) {
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my $ok = $self->_in_san( $check, $cert);
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die "Bad SSL certificate subject: '$subject' !~ /$check/"
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unless $ok;
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}
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$req->remove_header("If-SSL-Cert-Subject"); # don't pass it on
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}
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}
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sub _get_sock_info
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{
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my $self = shift;
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$self->SUPER::_get_sock_info(@_);
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my($res, $sock) = @_;
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$res->header("Client-SSL-Cipher" => $sock->get_cipher);
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my $cert = $sock->get_peer_certificate;
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if ($cert) {
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$res->header("Client-SSL-Cert-Subject" => $cert->subject_name);
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$res->header("Client-SSL-Cert-Issuer" => $cert->issuer_name);
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}
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if (!$self->{ssl_opts}{SSL_verify_mode}) {
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$res->push_header("Client-SSL-Warning" => "Peer certificate not verified");
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}
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elsif (!$self->{ssl_opts}{SSL_verifycn_scheme}) {
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$res->push_header("Client-SSL-Warning" => "Peer hostname match with certificate not verified");
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}
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$res->header("Client-SSL-Socket-Class" => $Net::HTTPS::SSL_SOCKET_CLASS);
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}
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# upgrade plain socket to SSL, used for CONNECT tunnel when proxying https
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# will only work if the underlying socket class of Net::HTTPS is
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# IO::Socket::SSL, but code will only be called in this case
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if ( $Net::HTTPS::SSL_SOCKET_CLASS->can('start_SSL')) {
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*_upgrade_sock = sub {
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my ($self,$sock,$url) = @_;
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$sock = LWP::Protocol::https::Socket->start_SSL( $sock,
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SSL_verifycn_name => $url->host,
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$self->_extra_sock_opts,
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);
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$@ = LWP::Protocol::https::Socket->errstr if ! $sock;
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return $sock;
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}
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}
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#-----------------------------------------------------------
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package LWP::Protocol::https::Socket;
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our @ISA = qw(Net::HTTPS LWP::Protocol::http::SocketMethods);
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1;
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__END__
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=head1 NAME
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LWP::Protocol::https - Provide https support for LWP::UserAgent
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=head1 SYNOPSIS
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use LWP::UserAgent;
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$ua = LWP::UserAgent->new(ssl_opts => { verify_hostname => 1 });
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$res = $ua->get("https://www.example.com");
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=head1 DESCRIPTION
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The LWP::Protocol::https module provides support for using https schemed
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URLs with LWP. This module is a plug-in to the LWP protocol handling, so
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you don't use it directly. Once the module is installed LWP is able
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to access sites using HTTP over SSL/TLS.
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If hostname verification is requested by LWP::UserAgent's C<ssl_opts>, and
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neither C<SSL_ca_file> nor C<SSL_ca_path> is set, then C<SSL_ca_file> is
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implied to be the one provided by Mozilla::CA. If the Mozilla::CA module
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isn't available SSL requests will fail. Either install this module, set up an
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alternative C<SSL_ca_file> or disable hostname verification.
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This module used to be bundled with the libwww-perl, but it was unbundled in
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v6.02 in order to be able to declare its dependencies properly for the CPAN
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tool-chain. Applications that need https support can just declare their
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dependency on LWP::Protocol::https and will no longer need to know what
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underlying modules to install.
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=head1 SEE ALSO
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L<IO::Socket::SSL>, L<Crypt::SSLeay>, L<Mozilla::CA>
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=head1 COPYRIGHT
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Copyright 1997-2011 Gisle Aas.
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This library is free software; you can redistribute it and/or
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modify it under the same terms as Perl itself.
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