Modified lamdaemon.pl
Don't run ssh as wwwrun anymore. Is was unsecure because apache needed an authorized key to log in without password. ssh-connection is now done as user logged in as admin.
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katagia
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@ -1,4 +1,3 @@
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lamdaemon.pl is used to modify quota and homedirs
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on a remote or local host via ssh.
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If you want wo use it you have to set up many
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@ -7,39 +6,17 @@ thins to get it work.
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1. Set values in LDAP Account manager
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* Set the remote or local host in the configuration
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(e.g. 127.0.0.1)
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* Set the remote-path include filename of the script
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(/srv/www/htdocs/lam/lib/lamdaemon.pl)
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2. Set up ssh
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We have to connect to the remote host as the user
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your webserver is running. Because we can't enter
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the password for it we have to authenticate without
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entering a password
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* Switch to the user your webserver is running as
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(e.g. su wwwrun)
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* switch to homedir of the webserver user
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(e.g. cd ~)
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* create the ssh-keys, just press enter if you'll asked
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for a password
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(e.g. ssh-keygen -t dsa)
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* Check if the user your webserver is running as does
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also exists on remote-host
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* Copy the content of ~/.ssh/id_dsa.pub from the system
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LDAP Account manager into ~/.ssh/authorized_keys on the
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remote machine
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* Connect to the remote server via ssh $remotehost
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Answer the next question with yes if the remote key is
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valid. You should be asked for a password
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3. Set up sudo
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The perlskript has to run as root (very ugly I know but
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I haven't found any other solution). Therefor we need
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a wrapper, sudo.
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Edit /etc/sudoers and add the following line:
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$wwwrun All= NOPASSWD: $path
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$wwwrun is the user your webserer is running and $path
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$admin All= NOPASSWD: $path
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$admin is the adminuser from lam and $path
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is the path include the filename of lamdaemon.pl
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e.g. wwwrun All= NOPASSWD: /srv/www/htdocs/lam/lib/lamdaemon.pl
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e.g. $admin All= NOPASSWD: /srv/www/htdocs/lam/lib/lamdaemon.pl
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4. Set up perl
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We need some external perl-modules, Quota and Net::LDAP
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@ -47,6 +24,7 @@ thins to get it work.
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perl -MCPAN -e shell
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install Quota
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install Net::LDAP
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install Net:SSH
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Please answer all questions to describe your system
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Every additional needed module should be installed
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automaticly
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@ -487,7 +487,8 @@ function getquotas($type,$user='+') { // Whis function will return the quotas fr
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$towrite = $ldap_q[0].' '.$ldap_q[1].' '.$user.' quota get ';
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if ($type=='user') $towrite = $towrite.'u';
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else $towrite = $towrite.'g';
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exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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//exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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exec("perl ".$_SESSION['config']->scriptPath." $towrite", $vals, $status);
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$vals = explode(':', $vals[0]);
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for ($i=0; $i<sizeof($vals); $i++) {
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$vals2 = explode(',', $vals[$i]);
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@ -515,7 +516,8 @@ function setquotas($values,$type,$values_old=false) { // Whis function will set
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}
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$i++;
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}
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if ($i!=0) exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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if ($i!=0) exec($$_SESSION['config']->scriptPath." $towrite", $vals);
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//if ($i!=0) exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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}
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function remquotas($user, $type) { // Whis function will remove the quotas from the specified user.
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@ -523,20 +525,23 @@ function remquotas($user, $type) { // Whis function will remove the quotas from
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$towrite = $ldap_q[0].' '.$ldap_q[1].' '.$user.' quota set ';
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if ($type=='user') $towrite = $towrite.'u ';
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else $towrite = $towrite.'g ';
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exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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exec($_SESSION['config']->scriptPath." $towrite", $vals);
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//exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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}
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function addhomedir($user) { // Create Homedirectory
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$ldap_q = $_SESSION['ldap']->decrypt();
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$towrite = $ldap_q[0].' '.$ldap_q[1].' '.$user.' home add';
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exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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exec($_SESSION['config']->scriptPath." $towrite", $vals);
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//exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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}
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function remhomedir($user) { // Remove Homedirectory
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$ldap_q = $_SESSION['ldap']->decrypt();
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$towrite = $ldap_q[0].' '.$ldap_q[1].' '.$user.' home rem';
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exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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exec($_SESSION['config']->scriptPath." $towrite", $vals);
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//exec("/usr/bin/ssh ".$_SESSION['config']->scriptServer." sudo ".$_SESSION['config']->scriptPath." $towrite", $vals);
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}
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@ -21,16 +21,17 @@
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#
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#
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# LDAP Account Manager daemon to create and delete homedirecotries and quotas
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# Drop root Previleges
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($<, $>) = ($>, $<);
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######################################################
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# Configure-Options
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# change only variables starting from here
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# list of valid admins
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@admins = ('cn=Manager,dc=my-domain,dc=com');
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$server="127.0.0.1"; # IP or DNS of ldap-server
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$server_port='389'; # Port used from ldap
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$server_ldap="127.0.0.1"; # IP or DNS of ldap-server
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$server_ssh="127.0.0.1"; # IP or DNS of host to create homedirs, quota, ....
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$server_ssh_ident = "/var/lib/wwwrun/.ssh/id_dsa";
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$server_ssh_known = "/var/lib/wwwrun/.ssh/knownhosts";
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$server_ldap_port='389'; # Port used from ldap
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$server_tls='no'; # Use TLS?
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$server_tls_verify='require'; # none,optional or require a valid server certificated
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$server_tls_clientcert=''; # path to client certificate
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@ -90,14 +91,16 @@ sub get_fs { # Load mountpoints from mtab if enabled quotas
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# ***************** Check values
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#if ($debug == true) { print "Input values: @vals\n"; }
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if ($( == 0 ) {
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# Drop root Previleges
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($<, $>) = ($>, $<);
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foreach my $admin (@admins) { # Check if user is admin
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if ($admin eq $vals[0]) { $found=true; }
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}
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if ($found==true) {
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# Connect to ldap-server and check if password is valid.
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$ldap = Net::LDAP->new($server, port => $server_port, version => 3) or die ('Can\'t connect to ldapserver.');
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$ldap = Net::LDAP->new($server_ldap, port => $server_ldap_port, version => 3) or die ('Can\'t connect to ldapserver.');
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if ($server_tls eq 'yes') {
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$mesg = $ldap->start_tls(
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verify => $server_tls_verify,
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@ -213,3 +216,17 @@ if ($found==true) {
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}
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else { $return = "Invalid User"; }
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print "$return\n";
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}
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else {
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use Net::SSH::Perl;
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@username = split (',', $vals[0]);
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$username[0] =~ s/uid=//;
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my $ssh = Net::SSH::Perl->new($server_ssh, options=>[
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"IdentityFile $server_ssh_ident",
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"UserKnownHostsFile $server_ssh_known"
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]);
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$ssh->login($username[0], $vals[1]);
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#$path = "/srv/www/htdocs/lam/lib/lamdaemon.pl";
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($stdout, $stderr, $exit) = $ssh->cmd("sudo $0 @ARGV");
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print "$stdout";
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}
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