411 lines
11 KiB
Perl
411 lines
11 KiB
Perl
package Apache::Authn::Redmine;
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=head1 Apache::Authn::Redmine
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Redmine - a mod_perl module to authenticate webdav subversion users
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against redmine database
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=head1 SYNOPSIS
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This module allow anonymous users to browse public project and
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registred users to browse and commit their project. Authentication is
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done against the redmine database or the LDAP configured in redmine.
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This method is far simpler than the one with pam_* and works with all
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database without an hassle but you need to have apache/mod_perl on the
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svn server.
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=head1 INSTALLATION
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For this to automagically work, you need to have a recent reposman.rb
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(after r860) and if you already use reposman, read the last section to
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migrate.
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Sorry ruby users but you need some perl modules, at least mod_perl2,
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DBI and DBD::mysql (or the DBD driver for you database as it should
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work on allmost all databases).
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On debian/ubuntu you must do :
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aptitude install libapache-dbi-perl libapache2-mod-perl2 libdbd-mysql-perl
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If your Redmine users use LDAP authentication, you will also need
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Authen::Simple::LDAP (and IO::Socket::SSL if LDAPS is used):
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aptitude install libauthen-simple-ldap-perl libio-socket-ssl-perl
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=head1 CONFIGURATION
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## This module has to be in your perl path
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## eg: /usr/lib/perl5/Apache/Authn/Redmine.pm
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PerlLoadModule Apache::Authn::Redmine
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<Location /svn>
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DAV svn
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SVNParentPath "/var/svn"
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AuthType Basic
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AuthName redmine
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Require valid-user
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PerlAccessHandler Apache::Authn::Redmine::access_handler
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PerlAuthenHandler Apache::Authn::Redmine::authen_handler
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## for mysql
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RedmineDSN "DBI:mysql:database=databasename;host=my.db.server"
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## for postgres
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# RedmineDSN "DBI:Pg:dbname=databasename;host=my.db.server"
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RedmineDbUser "redmine"
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RedmineDbPass "password"
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## Optional where clause (fulltext search would be slow and
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## database dependant).
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# RedmineDbWhereClause "and members.role_id IN (1,2)"
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## Optional credentials cache size
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# RedmineCacheCredsMax 50
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</Location>
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To be able to browse repository inside redmine, you must add something
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like that :
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<Location /svn-private>
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DAV svn
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SVNParentPath "/var/svn"
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Order deny,allow
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Deny from all
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# only allow reading orders
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<Limit GET PROPFIND OPTIONS REPORT>
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Allow from redmine.server.ip
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</Limit>
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</Location>
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and you will have to use this reposman.rb command line to create repository :
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reposman.rb --redmine my.redmine.server --svn-dir /var/svn --owner www-data -u http://svn.server/svn-private/
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=head1 MIGRATION FROM OLDER RELEASES
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If you use an older reposman.rb (r860 or before), you need to change
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rights on repositories to allow the apache user to read and write
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S<them :>
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sudo chown -R www-data /var/svn/*
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sudo chmod -R u+w /var/svn/*
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And you need to upgrade at least reposman.rb (after r860).
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=cut
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use strict;
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use warnings FATAL => 'all', NONFATAL => 'redefine';
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use DBI;
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use Digest::SHA1;
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# optional module for LDAP authentication
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my $CanUseLDAPAuth = eval("use Authen::Simple::LDAP; 1");
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use Apache2::Module;
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use Apache2::Access;
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use Apache2::ServerRec qw();
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use Apache2::RequestRec qw();
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use Apache2::RequestUtil qw();
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use Apache2::Const qw(:common :override :cmd_how);
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use APR::Pool ();
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use APR::Table ();
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# use Apache2::Directive qw();
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my @directives = (
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{
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name => 'RedmineDSN',
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req_override => OR_AUTHCFG,
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args_how => TAKE1,
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errmsg => 'Dsn in format used by Perl DBI. eg: "DBI:Pg:dbname=databasename;host=my.db.server"',
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},
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{
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name => 'RedmineDbUser',
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req_override => OR_AUTHCFG,
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args_how => TAKE1,
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},
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{
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name => 'RedmineDbPass',
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req_override => OR_AUTHCFG,
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args_how => TAKE1,
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},
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{
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name => 'RedmineDbWhereClause',
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req_override => OR_AUTHCFG,
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args_how => TAKE1,
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},
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{
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name => 'RedmineCacheCredsMax',
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req_override => OR_AUTHCFG,
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args_how => TAKE1,
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errmsg => 'RedmineCacheCredsMax must be decimal number',
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},
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);
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sub RedmineDSN {
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my ($self, $parms, $arg) = @_;
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$self->{RedmineDSN} = $arg;
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my $query = "SELECT
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hashed_password, salt, auth_source_id, permissions
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FROM members, projects, users, roles, member_roles
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WHERE
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projects.id=members.project_id
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AND member_roles.member_id=members.id
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AND users.id=members.user_id
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AND roles.id=member_roles.role_id
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AND users.status=1
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AND login=?
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AND identifier=? ";
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$self->{RedmineQuery} = trim($query);
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}
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sub RedmineDbUser { set_val('RedmineDbUser', @_); }
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sub RedmineDbPass { set_val('RedmineDbPass', @_); }
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sub RedmineDbWhereClause {
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my ($self, $parms, $arg) = @_;
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$self->{RedmineQuery} = trim($self->{RedmineQuery}.($arg ? $arg : "")." ");
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}
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sub RedmineCacheCredsMax {
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my ($self, $parms, $arg) = @_;
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if ($arg) {
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$self->{RedmineCachePool} = APR::Pool->new;
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$self->{RedmineCacheCreds} = APR::Table::make($self->{RedmineCachePool}, $arg);
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$self->{RedmineCacheCredsCount} = 0;
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$self->{RedmineCacheCredsMax} = $arg;
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}
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}
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sub trim {
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my $string = shift;
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$string =~ s/\s{2,}/ /g;
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return $string;
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}
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sub set_val {
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my ($key, $self, $parms, $arg) = @_;
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$self->{$key} = $arg;
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}
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Apache2::Module::add(__PACKAGE__, \@directives);
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my %read_only_methods = map { $_ => 1 } qw/GET PROPFIND REPORT OPTIONS/;
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sub access_handler {
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my $r = shift;
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unless ($r->some_auth_required) {
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$r->log_reason("No authentication has been configured");
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return FORBIDDEN;
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}
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my $method = $r->method;
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return OK unless defined $read_only_methods{$method};
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my $project_id = get_project_identifier($r);
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$r->set_handlers(PerlAuthenHandler => [\&OK])
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if is_public_project($project_id, $r) && anonymous_role_allows_browse_repository($r);
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return OK
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}
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sub authen_handler {
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my $r = shift;
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my ($res, $redmine_pass) = $r->get_basic_auth_pw();
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return $res unless $res == OK;
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if (is_member($r->user, $redmine_pass, $r)) {
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return OK;
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} else {
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$r->note_auth_failure();
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return AUTH_REQUIRED;
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}
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}
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# check if authentication is forced
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sub is_authentication_forced {
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my $r = shift;
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my $dbh = connect_database($r);
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my $sth = $dbh->prepare(
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"SELECT value FROM settings where settings.name = 'login_required';"
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);
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$sth->execute();
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my $ret = 0;
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if (my @row = $sth->fetchrow_array) {
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if ($row[0] eq "1" || $row[0] eq "t") {
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$ret = 1;
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}
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}
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$sth->finish();
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undef $sth;
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$dbh->disconnect();
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undef $dbh;
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$ret;
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}
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sub is_public_project {
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my $project_id = shift;
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my $r = shift;
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if (is_authentication_forced($r)) {
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return 0;
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}
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my $dbh = connect_database($r);
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my $sth = $dbh->prepare(
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"SELECT is_public FROM projects WHERE projects.identifier = ?;"
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);
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$sth->execute($project_id);
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my $ret = 0;
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if (my @row = $sth->fetchrow_array) {
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if ($row[0] eq "1" || $row[0] eq "t") {
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$ret = 1;
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}
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}
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$sth->finish();
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undef $sth;
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$dbh->disconnect();
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undef $dbh;
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$ret;
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}
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sub anonymous_role_allows_browse_repository {
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my $r = shift;
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my $dbh = connect_database($r);
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my $sth = $dbh->prepare(
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"SELECT permissions FROM roles WHERE builtin = 2;"
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);
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$sth->execute();
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my $ret = 0;
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if (my @row = $sth->fetchrow_array) {
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if ($row[0] =~ /:browse_repository/) {
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$ret = 1;
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}
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}
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$sth->finish();
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undef $sth;
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$dbh->disconnect();
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undef $dbh;
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$ret;
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}
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# perhaps we should use repository right (other read right) to check public access.
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# it could be faster BUT it doesn't work for the moment.
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# sub is_public_project_by_file {
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# my $project_id = shift;
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# my $r = shift;
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# my $tree = Apache2::Directive::conftree();
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# my $node = $tree->lookup('Location', $r->location);
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# my $hash = $node->as_hash;
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# my $svnparentpath = $hash->{SVNParentPath};
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# my $repos_path = $svnparentpath . "/" . $project_id;
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# return 1 if (stat($repos_path))[2] & 00007;
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# }
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sub is_member {
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my $redmine_user = shift;
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my $redmine_pass = shift;
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my $r = shift;
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my $dbh = connect_database($r);
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my $project_id = get_project_identifier($r);
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my $pass_digest = Digest::SHA1::sha1_hex($redmine_pass);
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my $cfg = Apache2::Module::get_config(__PACKAGE__, $r->server, $r->per_dir_config);
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my $usrprojpass;
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if ($cfg->{RedmineCacheCredsMax}) {
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$usrprojpass = $cfg->{RedmineCacheCreds}->get($redmine_user.":".$project_id);
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return 1 if (defined $usrprojpass and ($usrprojpass eq $pass_digest));
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}
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my $query = $cfg->{RedmineQuery};
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my $sth = $dbh->prepare($query);
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$sth->execute($redmine_user, $project_id);
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my $ret;
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while (my ($hashed_password, $salt, $auth_source_id, $permissions) = $sth->fetchrow_array) {
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unless ($auth_source_id) {
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my $method = $r->method;
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my $salted_password = Digest::SHA1::sha1_hex($salt.$pass_digest);
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if ($hashed_password eq $salted_password && ((defined $read_only_methods{$method} && $permissions =~ /:browse_repository/) || $permissions =~ /:commit_access/) ) {
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$ret = 1;
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last;
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}
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} elsif ($CanUseLDAPAuth) {
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my $sthldap = $dbh->prepare(
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"SELECT host,port,tls,account,account_password,base_dn,attr_login from auth_sources WHERE id = ?;"
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);
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$sthldap->execute($auth_source_id);
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while (my @rowldap = $sthldap->fetchrow_array) {
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my $ldap = Authen::Simple::LDAP->new(
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host => ($rowldap[2] eq "1" || $rowldap[2] eq "t") ? "ldaps://$rowldap[0]:$rowldap[1]" : $rowldap[0],
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port => $rowldap[1],
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basedn => $rowldap[5],
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binddn => $rowldap[3] ? $rowldap[3] : "",
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bindpw => $rowldap[4] ? $rowldap[4] : "",
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filter => "(".$rowldap[6]."=%s)"
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);
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my $method = $r->method;
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$ret = 1 if ($ldap->authenticate($redmine_user, $redmine_pass) && ((defined $read_only_methods{$method} && $permissions =~ /:browse_repository/) || $permissions =~ /:commit_access/));
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}
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$sthldap->finish();
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undef $sthldap;
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}
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}
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$sth->finish();
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undef $sth;
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$dbh->disconnect();
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undef $dbh;
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if ($cfg->{RedmineCacheCredsMax} and $ret) {
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if (defined $usrprojpass) {
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$cfg->{RedmineCacheCreds}->set($redmine_user.":".$project_id, $pass_digest);
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} else {
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if ($cfg->{RedmineCacheCredsCount} < $cfg->{RedmineCacheCredsMax}) {
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$cfg->{RedmineCacheCreds}->set($redmine_user.":".$project_id, $pass_digest);
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$cfg->{RedmineCacheCredsCount}++;
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} else {
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$cfg->{RedmineCacheCreds}->clear();
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$cfg->{RedmineCacheCredsCount} = 0;
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}
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}
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}
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$ret;
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}
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sub get_project_identifier {
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my $r = shift;
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my $location = $r->location;
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my ($identifier) = $r->uri =~ m{$location/*([^/]+)};
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$identifier;
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}
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sub connect_database {
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my $r = shift;
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my $cfg = Apache2::Module::get_config(__PACKAGE__, $r->server, $r->per_dir_config);
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return DBI->connect($cfg->{RedmineDSN}, $cfg->{RedmineDbUser}, $cfg->{RedmineDbPass});
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}
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1;
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