X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=cgi-auth-flexible.pm;h=ea833489876417d7e70d5a748caa4796a2105267;hb=d2386faae2eaf1ba830fa2d2c52a3d7f1e5d4b84;hp=4ab430d5f989affb6b080e1efe8401dedd5e518b;hpb=6ca44cd905b9d2c8d83bc10d95428f3da8ed7e45;p=cgi-auth-flexible.git

diff --git a/cgi-auth-flexible.pm b/cgi-auth-flexible.pm
index 4ab430d..ea83348 100644
--- a/cgi-auth-flexible.pm
+++ b/cgi-auth-flexible.pm
@@ -47,6 +47,7 @@ use Digest;
 use Digest::HMAC;
 use Digest::SHA;
 use Data::Dumper;
+use File::Copy;
 
 #---------- public utilities ----------
 
@@ -173,6 +174,177 @@ sub gen_plain_login_link ($$) {
 	    '</a>');
 }
 
+sub gen_srcdump_link_html ($$$$) {
+    my ($c,$r,$anchor,$specval) = @_;
+    my %params = ($r->{S}{srcdump_param_name} => [ $specval ]);
+    return '<a href="'.escapeHTML($r->url_with_query_params(\%params)).'">'.
+	$anchor."</a>";
+}
+sub gen_plain_licence_link_html ($$) {
+    my ($c,$r) = @_;
+    gen_srcdump_link_html($c,$r, 'GNU Affero GPL', 'licence');
+}
+sub gen_plain_source_link_html ($$) {
+    my ($c,$r) = @_;
+    gen_srcdump_link_html($c,$r, 'Source available', 'source');
+}
+
+sub gen_plain_footer_html ($$) {
+    my ($c,$r) = @_;
+    return ('<hr><address>',
+	    ("Powered by Free / Libre / Open Source Software".
+	     " according to the ".$r->_ch('gen_licence_link_html')."."),
+	    $r->_ch('gen_source_link_html').".",
+	    '</address>');
+}
+
+#---------- licence and source code ----------
+
+sub srcdump_dump ($$$) {
+    my ($c,$r, $thing) = @_;
+    die if $thing =~ m/\W/ || $thing !~ m/\w/;
+    my $path = $r->_get_path('srcdump');
+    my $ctf = new IO::File "$path/$thing.ctype", 'r'
+	or die "$path/$thing.ctype $!";
+    my $ct = <$ctf>;
+    chomp $ct or die "$path/$thing ?";
+    $ctf->close or die "$path/$thing $!";
+    my $df = new IO::File "$path/$thing.data", 'r'
+	or die "$path/$thing.data $!";
+    $r->_ch('dump', $ct, $df);
+}
+
+sub dump_plain ($$$$) {
+    my ($c, $r, $ct, $df) = @_;
+    $r->_print($c->header('-type' => $ct));
+    my $buffer;
+    for (;;) {
+	my $got = read $df, $buffer, 65536;
+	die $! unless defined $got;
+	return if !$got;
+	$r->_print($buffer);
+    }
+}
+
+sub srcdump_process_dir ($$$$$$) {
+    my ($c, $v, $dumpdir, $incdir, $tarballcounter,
+	$needlicence, $dirsdone) = @_;
+    return () if $v->_ch('srcdump_system_dir', $incdir);
+    my $upwards = $incdir;
+    for (;;) {
+	$upwards =~ s#/+##;
+	last unless $upwards =~ m#[^/]#;
+	foreach my $try (@{ $v->{S}{srcdump_vcs_dirs} }) {
+	    if (!stat "$upwards/$try") {
+		$!==&ENOENT or die "check $upwards/$try $!";
+		next;
+	    }
+	    $try =~ m/\w+/ or die;
+	    return if $dirsdone->{$upwards}++;
+	    return $v->_ch(('srcdump_byvcs_'.lc $try),
+			   $dumpdir, $upwards, $tarballcounter);
+	}
+	$upwards =~ s#/*[^/]+##;
+    }
+    return $v->_ch('srcdump_novcs', $dumpdir, $incdir, $tarballcounter);
+}
+
+sub srcdump_novcs ($$$$$) {
+    my ($c, $v, $dumpdir, $dir, $tarballcounter) = @_;
+    my $script = 'find -type f -perm +004';
+    foreach my $excl (@{ $v->{S}{srcdump_excludes} }) {
+	$script .= " \\! -name '$excl'";
+    }
+    $script .= " -print0";
+    return srcdump_dir_cpio($c,$v,$dumpdir,$dir,$tarballcounter,$script);
+}
+
+sub srcdump_byvcs_git ($$$$$) {
+    my ($c, $v, $dumpdir, $dir, $tarballcounter) = @_;
+    return srcdump_dir_cpio($c,$v,$dumpdir,$dir,$tarballcounter,"
+                 git-ls-files -z;
+                 git-ls-files -z --others --exclude-from=.gitignore;
+                 find .git -print0
+                            ");
+}
+
+sub srcdump_dir_cpio ($$$$$) {
+    my ($c,$v,$dumpdir,$dir,$tarballcounter,$script) = @_;
+    my $outfile = "$dumpdir/$$tarballcounter.tar";
+    my $pid = fork();
+    defined $pid or die $!;
+    if (!$pid) {
+	open STDOUT, ">", $outfile or die "$outfile $!";
+	chdir $dir or die "chdir $dir: $!";
+	exec '/bin/bash','-ec','',"
+            set -o pipefail
+	    (
+	     $script
+	    ) | (
+	     cpio -Hustar -o --quiet -0 -R 1000:1000 || \
+             cpio -Hustar -o --quiet -0
+            )
+            ";
+	die $!;
+    }
+    $!=0; (waitpid $pid, 0) == $pid or die "$!";
+    die "$dir ($script) $outfile $?" if $?;
+    print STDERR
+	"CGI::Auth::Flexible srcdump_dir_cpio saved $dir into $outfile\n"
+	or die $!;
+    $$tarballcounter++;
+    return $outfile;
+}
+
+sub srcdump_dirscan_prepare ($$) {
+    my ($c, $v) = @_;
+    my $dumpdir = $v->_get_path('srcdump');
+    mkdir $dumpdir or $!==&EEXIST or die "mkdir $dumpdir $!";
+    my $lockf = new IO::File "$dumpdir/generate.lock", 'w+'
+	or die "$dumpdir/generate.lock $!";
+    flock $lockf, LOCK_EX or die "$dumpdir/generate.lock $!";
+    my $needlicence = "$dumpdir/licence.tmp";
+    unlink $needlicence or $!==&ENOENT or die "rm $needlicence $!";
+    if (defined $v->{S}{srcdump_licence_path}) {
+	copy($v->{S}{srcdump_licence_path}, $needlicence)
+	    or die "$v->{S}{srcdump_licence_path} $!";
+	$needlicence = undef;
+    }
+    my $srctarballcounter = 'aaa';
+    my %dirsdone;
+    my @srcfiles = ("$dumpdir/licence.data");
+    foreach my $incdir ($v->_ch('srcdump_includedirs')) {
+	if (defined $needlicence) {
+	    foreach my $try (@{ $v->{S}{srcdump_licence_files} }) {
+		last if copy("$incdir/$try", $needlicence);
+		$!==&ENOENT or die "copy $incdir/$try $!";
+	    }
+	}
+	push @srcfiles, $v->_ch('srcdump_process_dir', $dumpdir, $incdir,
+				\$srctarballcounter, \$needlicence, \%dirsdone);
+	$dirsdone{$incdir}++;
+    }
+    $!=0;
+    my $r = system qw(tar -zvvc -f), "$dumpdir/source.tmp", '--', @srcfiles;
+    die "tar $r $!" if $r;
+    die "licence file not found" unless defined $needlicence;
+    srcdump_install($c,$v, $dumpdir, 'licence', 'text/plain');
+    srcdump_install($c,$v, $dumpdir, 'source', 'application/octet-stream');
+    close $lockf or die $!;
+}
+
+sub srcdump_install ($$$$$) {
+    my ($c,$v, $dumpdir, $which, $ctype) = @_;
+    rename "$dumpdir/$which.tmp", "$dumpdir/$which.data"
+	or die "$dumpdir/$which.data $!";
+    my $ctf = new IO::File "$dumpdir/$which.tmp", 'w'
+	or die "$dumpdir/$which.tmp $!";
+    print $ctf $ctype, "\n" or die $!;
+    close $ctf or die $!;
+    rename "$dumpdir/$which.tmp", "$dumpdir/$which.ctype"
+	or die "$dumpdir/$which.ctype $!";
+}
+
 #---------- verifier object methods ----------
 
 sub new_verifier {
@@ -183,6 +355,7 @@ sub new_verifier {
 	    assocdb_dbh => undef, # must have AutoCommit=0, RaiseError=1
 	    assocdb_path => 'caf-assocs.db',
 	    keys_path => 'caf-keys',
+	    srcdump_path => 'caf-srcdump',
 	    assocdb_dsn => undef,
 	    assocdb_user => '',
 	    assocdb_password => '',
@@ -197,6 +370,7 @@ sub new_verifier {
 	    dummy_param_name_prefix => 'caf__',
 	    cookie_name => "caf_assocsecret",
 	    password_param_name => 'password',
+	    srcdump_param_name => 'caf_srcdump',
 	    username_param_names => [qw(username)],
 	    form_entry_size => 60,
 	    logout_param_names => [qw(caf_logout)],
@@ -221,10 +395,28 @@ sub new_verifier {
 	    get_cookie_domain => \&get_cookie_domain,
 	    encrypted_only => 1,
 	    gen_start_html => sub { $_[0]->start_html($_[2]); },
+	    gen_footer_html => \&gen_plain_footer_html,
+	    gen_licence_link_html => \&gen_plain_licence_link_html,
+	    gen_source_link_html => \&gen_plain_source_link_html,
 	    gen_end_html => sub { $_[0]->end_html(); },
 	    gen_login_form => \&gen_plain_login_form,
 	    gen_login_link => \&gen_plain_login_link,
 	    gen_postmainpage_form => \&gen_postmainpage_form,
+	    srcdump_dump => \&srcdump_dump,
+	    srcdump_prepare => \&srcdump_dirscan_prepare,
+	    srcdump_licence_path => undef,
+	    srcdump_licence_files => [qw(AGPLv3 CGI/Auth/Flexible/AGPLv3)],
+	    srcdump_includedirs => sub { return @INC; },
+	    srcdump_system_dir => sub { $_[2] =~ m#^/etc/|^/usr/(?!local/)#; },
+	    srcdump_process_dir => \&srcdump_process_dir,
+	    srcdump_vcs_dirs => [qw(.git .hg .svn CVS)],
+	    srcdump_byvcs_git => \&srcdump_byvcs_git,
+	    srcdump_byvcs_hg => \&srcdump_byvcs_hg,
+	    srcdump_byvcs_svn => \&srcdump_byvcs_svn,
+	    srcdump_byvcs_cvs => \&srcdump_byvcs_cvs,
+	    srcdump_novcs => \&srcdump_novcs,
+	    srcdump_excludes => [qw(*~ *.bak *.tmp), '#*#'],
+	    dump => \&dump_plain,
 	    gettext => sub { gettext($_[2]); },
 	    print => sub { print $_[2] or die $!; },
             debug => sub { }, # like print; msgs contain trailing \n
@@ -238,6 +430,7 @@ sub new_verifier {
     }
     bless $verifier, $class;
     $verifier->_dbopen();
+    $verifier->_ch('srcdump_prepare');
     return $verifier;
 }
 
@@ -365,10 +558,15 @@ sub _debug ($@) {
 }
 
 sub _get_path ($$) {
-    my ($v,$keybase) = @_;
-    my $leaf = $v->{S}{"${keybase}_path"};
-    my $dir = $v->{S}{dir};
+    my ($r,$keybase) = @_;
+    my $leaf = $r->{S}{"${keybase}_path"};
+    return $r->_absify_path($leaf);
+}
+
+sub _absify_path ($$) {
+    my ($v,$leaf) = @_;
     return $leaf if $leaf =~ m,^/,;
+    my $dir = $v->{S}{dir};
     die "relying on cwd by default ?!  set dir" unless defined $dir;
     return "$dir/$leaf";
 }
@@ -504,9 +702,18 @@ my @ca = (-name => $r->{S}{cookie_name},
 sub _check_divert_core ($) {
     my ($r) = @_;
 
+    my $srcdump = $r->_rp('srcdump_param_name');
+    if ($srcdump) {
+	die if $srcdump =~ m/\W/;
+	return ({ Kind => 'SRCDUMP-'.uc $srcdump,
+		  Message => undef,
+		  CookieSecret => undef,
+		  Params => { } });
+    }
+
     my $cooks = $r->_ch('get_cookie');
 
-    if (!$r->_ch('check_https')) {
+    if ($r->{S}{encrypted_only} && !$r->_ch('check_https')) {
         return ({ Kind => 'REDIRECT-HTTPS',
                   Message => $r->_gt("Redirecting to secure server..."),
                   CookieSecret => undef,
@@ -536,8 +743,8 @@ sub _check_divert_core ($) {
     }
     if ($r->_ch('is_loggedout')) {
 	die unless $meth eq 'GET';
-	die unless $cookt;
-	die unless $parmt;
+	die if $cookt eq 'y';
+	die if $parmt;
 	return ({ Kind => 'SMALLPAGE-LOGGEDOUT',
 		  Message => $r->_gt("You have been logged out."),
 		  CookieSecret => '',
@@ -783,6 +990,11 @@ sub check_ok ($) {
     my $params = $divert->{Params};
     my $cookie = $r->construct_cookie($cookiesecret);
 
+    if ($kind =~ m/^SRCDUMP-(\w+)$/) {
+	$r->_ch('srcdump_dump', (lc $1));
+	return 0;
+    }
+
     if ($kind =~ m/^REDIRECT-/) {
 	# for redirects, we honour stored NextParams and SetCookie,
 	# as we would for non-divert
@@ -828,8 +1040,9 @@ sub check_ok ($) {
 
     $r->_print($r->{Cgi}->header($r->_cgi_header_args($cookie)),
 	       $r->_ch('gen_start_html',$title),
-	       (join "\n", @body),
-	       $r->_ch('gen_end_html'));
+	       (join "\n", (@body,
+		            $r->_ch('gen_footer_html'),
+			    $r->_ch('gen_end_html'))));
     return 0;
 }