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Add SASL PLAIN authentication support (#92)

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Adds a new sasl mech 'plain' which converts all simple authentication
methods to SASL PLAIN.  NOTE: doesn't use auth_type 'sasl' as
credentials may come from login form, stored in cookies etc...
This commit is contained in:
sshambar 2020-02-19 14:12:39 -08:00 committed by GitHub
parent 4eb3737d31
commit 0fe1758572
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 26 additions and 9 deletions
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9
config/config.php.example
View File

@ -341,11 +341,16 @@ $servers->setValue('server','name','My LDAP Server');
/* Enable SASL authentication LDAP SASL authentication requires PHP 5.x
configured with --with-ldap-sasl=DIR. If this option is disabled (ie, set to
false), then all other sasl options are ignored. */
// $servers->setValue('login','auth_type','sasl');
# $servers->setValue('login','auth_type','sasl');
/* SASL auth mechanism */
/* SASL GSSAPI auth mechanism (requires auth_type of sasl) */
// $servers->setValue('sasl','mech','GSSAPI');
/* SASL PLAIN support... this mech converts simple binds to SASL
PLAIN binds using any auth_type (or other bind_id/pass) as credentials.
NOTE: auth_type must be simple auth compatible (ie not sasl) */
# $servers->setValue('sasl','mech','PLAIN');
/* SASL authentication realm name */
// $servers->setValue('sasl','realm','');
# $servers->setValue('sasl','realm','EXAMPLE.COM');

26
lib/ds_ldap.php
View File

@ -195,7 +195,7 @@ class ldap extends DS {
# If SASL has been configured for binding, then start it now.
if ($this->isSASLEnabled())
$bind['result'] = $this->startSASL($resource,$method);
$bind['result'] = $this->startSASL($resource,$method,$bind['id'],$bind['pass']);
# Normal bind...
else
@ -588,6 +588,8 @@ class ldap extends DS {
* Users may configure phpLDAPadmin to use SASL in config,php thus:
* <code>
* $servers->setValue('login','auth_type','sasl');
* OR
* $servers->setValue('sasl','mech','PLAIN');
* </code>
*
* @return boolean
@ -596,8 +598,11 @@ class ldap extends DS {
if (DEBUG_ENABLED && (($fargs=func_get_args())||$fargs='NOARGS'))
debug_log('Entered (%%)',17,0,__FILE__,__LINE__,__METHOD__,$fargs);
if ($this->getValue('login','auth_type') != 'sasl')
return false;
if (! in_array($this->getValue('login','auth_type'), array('sasl'))) {
// check if SASL mech uses login from other auth_types
if (! in_array(strtolower($this->getValue('sasl', 'mech')), array('plain')))
return false;
}
if (! function_exists('ldap_sasl_bind')) {
error(_('SASL has been enabled in your config, but your PHP install does not support SASL. SASL will be disabled.'),'warn');
@ -615,7 +620,7 @@ class ldap extends DS {
*
* @todo This has not been tested, please let the developers know if this function works as expected.
*/
private function startSASL($resource,$method) {
private function startSASL($resource,$method,$login,$pass) {
if (DEBUG_ENABLED && (($fargs=func_get_args())||$fargs='NOARGS'))
debug_log('Entered (%%)',17,0,__FILE__,__LINE__,__METHOD__,$fargs);
@ -625,8 +630,8 @@ class ldap extends DS {
if ($method == 'anon')
return false;
# At the moment, we have only implemented GSSAPI
if (! in_array(strtolower($this->getValue('sasl','mech')),array('gssapi'))) {
# At the moment, we have only implemented GSSAPI and PLAIN
if (! in_array(strtolower($this->getValue('sasl','mech')),array('gssapi','plain'))) {
system_message(array(
'title'=>_('SASL Method not implemented'),
'body'=>sprintf('<b>%s</b>: %s %s',_('Error'),$this->getValue('sasl','mech'),_('has not been implemented yet')),
@ -635,8 +640,15 @@ class ldap extends DS {
return false;
}
if (strtolower($this->getValue('sasl','mech')) == 'plain') {
return @ldap_sasl_bind($resource,NULL,$pass,'PLAIN',
$this->getValue('sasl','realm'),
$login,
$this->getValue('sasl','props'));
}
if (! isset($CACHE['login_dn']))
$CACHE['login_dn'] = is_null($this->getLogin($method)) ? $this->getLogin('user') : $this->getLogin($method);
$CACHE['login_dn'] = $login;
$CACHE['authz_id'] = '';