* Parse svn log as xml for improved utf8 and security. Note that this makes

ikiwiki depend on XML::Simple. Patch by Faidon Liambotis.
master
joey 2006-07-02 02:18:31 +00:00
parent 25b35c3c74
commit 0bb605baf8
7 changed files with 84 additions and 70 deletions

View File

@ -33,6 +33,11 @@ sub cgi_recentchanges ($) { #{{{
unlockwiki();
# Force reading the template as utf-8, necessary if
# rcs_recentchanges returns true utf-8 strings.
open(TMPL, "<:utf8", "$config{templatedir}/recentchanges.tmpl");
my $template=HTML::Template->new(filehandle => *TMPL);
close(TMPL);
my $template=HTML::Template->new(
filename => "$config{templatedir}/recentchanges.tmpl"
);
@ -44,8 +49,7 @@ sub cgi_recentchanges ($) { #{{{
styleurl => styleurl(),
baseurl => "$config{url}/",
);
require Encode;
print $q->header(-charset=>'utf-8'), Encode::decode_utf8($template->output);
print $q->header(-charset=>'utf-8'), $template->output;
} #}}}
sub cgi_signin ($$) { #{{{

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@ -7,7 +7,6 @@ use IkiWiki;
package IkiWiki;
my $svn_log_infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
my $svn_webcommit=qr/^web commit by (\w+):?(.*)/;
sub svn_info ($$) { #{{{
@ -99,67 +98,64 @@ sub rcs_recentchanges ($) { #{{{
my $num=shift;
my @ret;
return unless -d "$config{srcdir}/.svn";
eval q{use CGI 'escapeHTML'};
eval q{use Date::Parse};
eval q{use Time::Duration};
eval q{use XML::Simple};
if (-d "$config{srcdir}/.svn") {
my $svn_url=svn_info("URL", $config{srcdir});
my $svn_url=svn_info("URL", $config{srcdir});
my $xml = XMLin(scalar `svn --xml -v log '$svn_url'`,
ForceArray => [ 'logentry', 'path' ],
GroupTags => { paths => 'path' },
KeyAttr => { path => 'content' },
);
foreach my $logentry (@{$xml->{logentry}}) {
my (@pages, @message);
my $div=qr/^--------------------+$/;
my $state='start';
my ($rev, $user, $when, @pages, @message);
foreach (`LANG=C svn log -v '$svn_url'`) {
chomp;
if ($state eq 'start' && /$div/) {
$state='header';
}
elsif ($state eq 'header' && /$svn_log_infoline/) {
$rev=$1;
$user=$2;
$when=concise(ago(time - str2time($3)));
}
elsif ($state eq 'header' && /^\s+[A-Z]+\s+\/\Q$config{svnpath}\E\/([^ ]+)(?:$|\s)/) {
my $file=$1;
my $diffurl=$config{diffurl};
$diffurl=~s/\[\[file\]\]/$file/g;
$diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
$diffurl=~s/\[\[r2\]\]/$rev/g;
push @pages, {
link => htmllink("", "", pagename($file), 1),
diffurl => $diffurl,
} if length $file;
}
elsif ($state eq 'header' && /^$/) {
$state='body';
}
elsif ($state eq 'body' && /$div/) {
my $committype="web";
if (defined $message[0] &&
$message[0]->{line}=~/$svn_webcommit/) {
$user="$1";
$message[0]->{line}=$2;
}
else {
$committype="svn";
}
push @ret, { rev => $rev,
user => htmllink("", "", $user, 1),
committype => $committype,
when => $when, message => [@message],
pages => [@pages],
} if @pages;
return @ret if @ret >= $num;
$state='header';
$rev=$user=$when=undef;
@pages=@message=();
}
elsif ($state eq 'body') {
push @message, {line => escapeHTML($_)},
}
my $rev = $logentry->{revision};
my $user = $logentry->{author};
my $date = $logentry->{date};
$date =~ s/T/ /;
$date =~ s/\.\d+Z$//;
my $when=concise(ago(time - str2time($date, 'UTC')));
foreach my $msgline (split(/\n/, $logentry->{msg})) {
push @message, { line => escapeHTML($msgline) };
}
my $committype="web";
if (defined $message[0] &&
$message[0]->{line}=~/$svn_webcommit/) {
$user="$1";
$message[0]->{line}=$2;
}
else {
$committype="svn";
}
foreach (keys %{$logentry->{paths}}) {
next unless /^\/\Q$config{svnpath}\E\/([^ ]+)(?:$|\s)/;
my $file=$1;
my $diffurl=$config{diffurl};
$diffurl=~s/\[\[file\]\]/$file/g;
$diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
$diffurl=~s/\[\[r2\]\]/$rev/g;
push @pages, {
link => htmllink("", "", pagename($file), 1),
diffurl => $diffurl,
} if length $file;
}
push @ret, { rev => $rev,
user => htmllink("", "", $user, 1),
committype => $committype,
when => $when,
message => [@message],
pages => [@pages],
} if @pages;
return @ret if @ret >= $num;
}
return @ret;
@ -230,6 +226,8 @@ sub rcs_notify () { #{{{
sub rcs_getctime ($) { #{{{
my $file=shift;
eval q{use Date::Parse};
my $svn_log_infoline=qr/^r\d+\s+\|\s+[^\s]+\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
my $child = open(SVNLOG, "-|");
if (! $child) {
@ -239,7 +237,7 @@ sub rcs_getctime ($) { #{{{
my $date;
while (<SVNLOG>) {
if (/$svn_log_infoline/) {
$date=$3;
$date=$1;
}
}
close SVNLOG || warn "svn log $file exited $?";

4
debian/changelog vendored
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@ -6,8 +6,10 @@ ikiwiki (1.8) UNRELEASED; urgency=low
about changes to rss feeds.
* Honor LC_CTIME when formatting a time for display. Thanks, Faidon
Liambotis.
* Parse svn log as xml for improved utf8 and security. Note that this makes
ikiwiki depend on XML::Simple. Patch by Faidon Liambotis.
-- Joey Hess <joeyh@debian.org> Sat, 1 Jul 2006 20:28:26 -0400
-- Joey Hess <joeyh@debian.org> Sat, 1 Jul 2006 20:41:55 -0400
ikiwiki (1.7) unstable; urgency=low

2
debian/control vendored
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@ -8,7 +8,7 @@ Standards-Version: 3.7.2
Package: ikiwiki
Architecture: all
Depends: ${perl:Depends}, markdown, libtimedate-perl, libhtml-template-perl, libhtml-scrubber-perl, libcgi-formbuilder-perl (>= 3.02.02), libtime-duration-perl, libcgi-session-perl, libmail-sendmail-perl, gcc | c-compiler, libc6-dev | libc-dev
Depends: ${perl:Depends}, libxml-simple-perl, markdown, libtimedate-perl, libhtml-template-perl, libhtml-scrubber-perl, libcgi-formbuilder-perl (>= 3.02.02), libtime-duration-perl, libcgi-session-perl, libmail-sendmail-perl, gcc | c-compiler, libc6-dev | libc-dev
Recommends: subversion | git-core, hyperestraier
Suggests: viewcvs, librpc-xml-perl
Description: a wiki compiler

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@ -7,3 +7,5 @@ have that locale.
Seems that the right fix for this is to use svn log --xml, which is
always utf-8 and come up with a parser for that. Also fixes the spoofing
issue in [[security]].
[[bugs/done]]

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@ -3,7 +3,8 @@ The easiest way to install ikiwiki is using the Debian package.
Ikiwiki requires [[MarkDown]] be installed, and also uses the following
perl modules if available: `CGI::Session` `CGI::FormBuilder` (version
3.02.02 or newer) `HTML::Template` `Mail::SendMail` `Time::Duration`
`Date::Parse` (libtimedate-perl), `HTML::Scrubber`, `RPC::XML`
`Date::Parse` (libtimedate-perl), `HTML::Scrubber`, `RPC::XML`,
`XML::Simple`
If you want to install from the tarball, you should make sure that the required perl modules are installed, then run:

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@ -12,17 +12,16 @@ to be kept in mind.
_(The list of things to fix.)_
## svn commit logs
## commit spoofing
Anyone with svn commit access can forge "web commit from foo" and make it
appear on [[RecentChanges]] like foo committed. One way to avoid this would
be to limit web commits to those done by a certian user.
Anyone with direct commit access can forge "web commit from foo" and
make it appear on [[RecentChanges]] like foo committed. One way to avoid
this would be to limit web commits to those done by a certian user.
It's actually possible to force a whole series of svn commits to appear to
have come just before yours, by forging svn log output. This could be
guarded against by using svn log --xml.
## other stuff to look at
ikiwiki escapes any html in svn commit logs to prevent other mischief.
I need to audit the git backend a bit, and have been meaning to
see if any CRLF injection type things can be done.
----
@ -227,3 +226,11 @@ only render a file with that extension.
ikiwiki supports protecting users from their own broken browsers via the
[[plugins/htmlscrubber]] plugin, which is enabled by default.
## svn commit logs
It's was possible to force a whole series of svn commits to appear to
have come just before yours, by forging svn log output. This was
guarded against by using svn log --xml.
ikiwiki escapes any html in svn commit logs to prevent other mischief.