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use strict;
use Test;
BEGIN { plan tests => 26 }
use UNIVERSAL qw(isa);
use XML::LibXSLT;
use XML::LibXML 1.59;
use Data::Dumper;
use Devel::Peek;
my $parser = XML::LibXML->new();
print "# parser\n";
ok($parser);
my $xslt = XML::LibXSLT->new();
print "# xslt\n";
ok($xslt);
my $stylsheetstring = <<'EOT';
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl">
<xsl:template match="/">
<html>
<head><title>Know Your Dromedaries</title></head>
<body>
<h1><xsl:apply-templates/></h1>
<xsl:choose>
<xsl:when test="file">
<p>foo: <xsl:apply-templates select="document(file)/*" /></p>
</xsl:when>
<xsl:when test="write">
<exsl:document href="{write}">
<outfile><xsl:value-of select="write"/></outfile>
</exsl:document>
<p>wrote: <xsl:value-of select="write"/></p>
</xsl:when>
<xsl:otherwise>
No file given
</xsl:otherwise>
</xsl:choose>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
EOT
# We're using input callbacks so that we don't actually need real files while
# testing the security callbacks
my $icb = XML::LibXML::InputCallback->new();
ok($icb);
print "# registering input callbacks\n";
$icb->register_callbacks( [ \&match_cb, \&open_cb,
\&read_cb, \&close_cb ] );
$xslt->input_callbacks($icb);
my $scb = XML::LibXSLT::Security->new();
ok($scb);
print "# registering security callbacks\n";
$scb->register_callback( read_file => \&read_file );
$scb->register_callback( write_file => \&write_file );
$scb->register_callback( create_dir => \&create_dir );
$scb->register_callback( read_net => \&read_net );
$scb->register_callback( write_net => \&write_net );
$xslt->security_callbacks($scb);
my $stylesheet = $xslt->parse_stylesheet($parser->parse_string($stylsheetstring));
print "# stylesheet\n";
ok($stylesheet);
# test local read
# ---------------------------------------------------------------------------
# - test allowed
my $doc = $parser->parse_string('<file>allow.xml</file>');
my $results = $stylesheet->transform($doc);
print "# local read results\n";
ok($results);
my $output = $stylesheet->output_string($results);
#warn "output: $output\n";
print "# local read output\n";
ok($output =~ /foo: Text here/);
# - test denied
$doc = $parser->parse_string('<file>deny.xml</file>');
eval {
$results = $stylesheet->transform($doc);
};
print "# local read denied\n";
ok($@ =~ /read for deny\.xml refused/);
# test local write & create dir
# ---------------------------------------------------------------------------
# - test allowed (no create dir)
my $file = 't/allow.xml';
$doc = $parser->parse_string("<write>$file</write>");
$results = $stylesheet->transform($doc);
print "# local write (no create dir) results\n";
ok($results);
$output = $stylesheet->output_string($results);
#warn "output: $output\n";
print "# local write (no create dir) output\n";
ok($output =~ /wrote: \Q$file\E/);
print "# local write (no create dir) file exists\n";
ok(-s $file);
unlink $file;
# - test allowed (create dir)
$file = 't/newdir/allow.xml';
$doc = $parser->parse_string("<write>$file</write>");
$results = $stylesheet->transform($doc);
print "# local write (create dir) results\n";
ok($results);
$output = $stylesheet->output_string($results);
#warn "output: $output\n";
print "# local write (create dir) output\n";
ok($output =~ /wrote: \Q$file\E/);
print "# local write (create dir) file exists\n";
ok(-s $file);
unlink $file;
rmdir 't/newdir';
# - test denied (no create dir)
$file = 't/deny.xml';
$doc = $parser->parse_string("<write>$file</write>");
eval {
$results = $stylesheet->transform($doc);
};
print "# local write (no create dir) denied\n";
ok($@ =~ /write for \Q$file\E refused/);
ok(!-e $file);
# - test denied (create dir)
$file = 't/baddir/allow.xml';
$doc = $parser->parse_string("<write>$file</write>");
eval {
$results = $stylesheet->transform($doc);
};
print "# local write (create dir) denied\n";
ok($@ =~ /creation for \Q$file\E refused/);
ok(!-e $file);
# test net read
# ---------------------------------------------------------------------------
# - test allowed
$doc = $parser->parse_string('<file>http://localhost/allow.xml</file>');
$results = $stylesheet->transform($doc);
print "# net read results\n";
ok($results);
$output = $stylesheet->output_string($results);
#warn "output: $output\n";
print "# net read output\n";
ok($output =~ /foo: Text here/);
# - test denied
$doc = $parser->parse_string('<file>http://localhost/deny.xml</file>');
eval {
$results = $stylesheet->transform($doc);
};
print "# net read denied\n";
ok($@ =~ m|read for http://localhost/deny\.xml refused|);
# test net write
# ---------------------------------------------------------------------------
# - test allowed
$file = 'http://localhost/allow.xml';
$doc = $parser->parse_string("<write>$file</write>");
eval {
$results = $stylesheet->transform($doc);
};
print "# net write allowed\n";
ok($@ =~ /unable to save to \Q$file\E/);
# - test denied
$file = 'http://localhost/deny.xml';
$doc = $parser->parse_string("<write>$file</write>");
eval {
$results = $stylesheet->transform($doc);
};
print "# net write denied\n";
ok($@ =~ /write for \Q$file\E refused/);
# test a dying security callback (and resetting the callback object through
# the stylesheet interface).
# ---------------------------------------------------------------------------
my $scb2 = XML::LibXSLT::Security->new();
$scb2->register_callback( read_file => \&read_file_die );
$stylesheet->security_callbacks($scb2);
# check if transform throws an exception
$doc = $parser->parse_string('<file>allow.xml</file>');
print "# dying callback test\n";
eval {
$stylesheet->transform($doc);
};
ok($@ =~ /Test die from security callback/);
#
# Security preference callbacks
#
sub read_file {
my ($tctxt, $value) = @_;
print "# security read_file: $value\n";
if ($value eq 'allow.xml') {
print "# transform context\n";
ok( isa($tctxt, "XML::LibXSLT::TransformContext") );
print "# stylesheet from transform context\n";
ok( isa($tctxt->stylesheet, "XML::LibXSLT::StylesheetWrapper") );
return 1;
}
else {
return 0;
}
}
sub read_file_die {
my ($tctxt, $value) = @_;
print "# security read_file_die: $value\n";
die "Test die from security callback";
}
sub write_file {
my ($tctxt, $value) = @_;
print "# security write_file: $value\n";
if ($value =~ /allow\.xml|newdir|baddir/) {
return 1;
}
else {
return 0;
}
}
sub create_dir {
my ($tctxt, $value) = @_;
print "# security create_dir: $value\n";
if ($value =~ /newdir/) {
return 1;
}
else {
return 0;
}
}
sub read_net {
my ($tctxt, $value) = @_;
print "# security read_net: $value\n";
if ($value =~ /allow\.xml/) {
return 1;
}
else {
return 0;
}
}
sub write_net {
my ($tctxt, $value) = @_;
print "# security write_net: $value\n";
if ($value =~ /allow\.xml/) {
return 1;
}
else {
return 0;
}
}
#
# input callback functions (used so we don't have to have an actual file)
#
sub match_cb {
my $uri = shift;
print "# input match_cb: $uri\n";
if ($uri =~ /(allow|deny)\.xml/) {
return 1;
}
return 0;
}
sub open_cb {
my $uri = shift;
print "# input open_cb: $uri\n";
my $str ="<foo>Text here</foo>";
return \$str;
}
sub close_cb {
print "# input close_cb\n";
}
sub read_cb {
print "# input read_cb\n";
return substr(${$_[0]}, 0, $_[1], "");
}
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