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LDAPAccountManager/lam/lib/schema.inc

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<?php
/*
$Id$
Copyright (C) 2004 David Smith
modified to fit for LDAP Account Manager 2005 Roland Gruber
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* Classes and functions for fetching and parsing schema from an LDAP server.
*
* @package lib
* @author The phpLDAPadmin development team
* @author Roland Gruber
*/
/** To enable/disable session-based schema caching (1: enabled, 0: disabled). */
@define( 'SCHEMA_SESSION_CACHE_ENABLED', 1 );
/**
* Generic parent class for all schema items. A schema item is
* an ObjectClass, an AttributeBype, a MatchingRule, or a Syntax.
* All schema items have at least two things in common: An OID
* and a description. This class provides an implementation for
* these two data.
*/
class SchemaItem
{
/** The OID of this schema item. */
var $oid;
/** The description of this schema item. */
var $description;
/** Initialize class members to default values. */
function initVars()
{
$this->oid = null;
$this->description = null;
}
/** Default constructor. */
function SchemaItem()
{
$this->initVars();
}
function setOID( $new_oid )
{
$this->oid = $new_oid;
}
function setDescription( $new_desc )
{
$this->description = $new_desc;
}
function getOID()
{
return $this->oid;
}
function getDescription()
{
return $this->description;
}
}
/**
* Represents an LDAP objectClass
*/
class ObjectClass extends SchemaItem
{
/** This objectClass' name, ie "inetOrgPerson" */
var $name;
/** array of objectClass names from which this objectClass inherits */
var $sup_classes;
/** one of STRUCTURAL, ABSTRACT, or AUXILIARY */
var $type;
/** arrays of attribute names that this objectClass requires */
var $must_attrs;
/** arrays of attribute names that this objectClass allows, but does not require */
var $may_attrs;
/** boolean value indicating whether this objectClass is obsolete */
var $is_obsolete;
/** array of objectClasses which inherit from this one (must be set at runtime explicitly by the caller) */
var $children_objectclasses;
/** Initialize the class' member variables */
function initVars()
{
parent::initVars();
$this->oid = null;
$this->name = null;
$this->description = null;
$this->sup_classes = array();
$this->type = null;
$this->must_attrs = array();
$this->may_attrs = array();
$this->is_obsolete = false;
$this->children_objectclasses = array();
}
/**
* Creates a new ObjectClass object given a raw LDAP objectClass string.
*/
function ObjectClass( $raw_ldap_schema_string )
{
$this->initVars();
$class = $raw_ldap_schema_string;
$strings = preg_split ("/[\s,]+/", $class, -1,PREG_SPLIT_DELIM_CAPTURE);
for($i=0; $i<count($strings); $i++) {
switch($strings[$i]) {
case '(':
break;
case 'NAME':
if($strings[$i+1]!="(") {
do {
$i++;
if(strlen($this->name)==0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
} else {
$i++;
do {
$i++;
if(strlen($this->name) == 0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
} while(!preg_match("/\'$/s", $strings[$i]));
do {
$i++;
}while($strings[$i]!=")");
}
$this->name = preg_replace("/^\'/", "", $this->name);
$this->name = preg_replace("/\'$/", "", $this->name);
break;
case 'DESC':
do {
$i++;
if(strlen($this->description)==0)
$this->description=$this->description . $strings[$i];
else
$this->description=$this->description . " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
break;
case 'OBSOLETE':
$this->is_obsolete = TRUE;
break;
case 'SUP':
if($strings[$i+1]!="(") {
$i++;
array_push ($this->sup_classes, $strings[$i]);
}else{
$i++;
do {
$i++;
if($strings[$i]!="$")
array_push( $this->sup_classes, $strings[$i] );
}while($strings[$i+1]!=")");
}
break;
case 'ABSTRACT':
$this->type='abstract';
break;
case 'STRUCTURAL':
$this->type='structural';
break;
case 'AUXILIARY':
$this->type='auxiliary';
break;
case 'MUST':
if (preg_match("/^\(./",$strings[$i+1]))
{
$i++;
$attr = new ObjectClassAttribute(preg_replace("/^\(/","",$strings[$i]), $this->name);
array_push ($this->must_attrs, $attr);
}
elseif($strings[$i+1]!="(")
{
$i++;
$attr = new ObjectClassAttribute($strings[$i], $this->name);
array_push ($this->must_attrs, $attr);
}else{
$i++;
do {
$i++;
if($strings[$i]!="$")
{
$attr = new ObjectClassAttribute($strings[$i], $this->name);
array_push ($this->must_attrs, $attr);
}
}while($strings[$i+1]!=")");
}
sort($this->must_attrs);
break;
case 'MAY':
if (preg_match("/^\(./",$strings[$i+1]))
{
$i++;
$attr = new ObjectClassAttribute(preg_replace("/^\(/","",$strings[$i]), $this->name);
array_push ($this->may_attrs, $attr);
}
elseif($strings[$i+1]!="(")
{
$i++;
$attr = new ObjectClassAttribute($strings[$i], $this->name);
array_push ($this->may_attrs, $attr);
}else{
$i++;
do
{
$i++;
if($strings[$i]!="$")
{
$attr = new ObjectClassAttribute($strings[$i], $this->name);
array_push ($this->may_attrs, $attr);
}
}while($strings[$i+1]!=")");
}
sort($this->may_attrs);
break;
default:
if(preg_match ("/[\d\.]+/i",$strings[$i]) && $i == 1)
$this->oid = $strings[$i];
}
}
$this->description = preg_replace("/^\'/", "", $this->description);
$this->description = preg_replace("/\'$/", "", $this->description);
}
/**
* Gets an array of AttributeType objects that entries of this ObjectClass must define.
* This differs from getMustAttrNames in that it returns an array of AttributeType objects
*
* @param array $oclasses An array of ObjectClass objects to use when traversing
* the inheritance tree. This presents some what of a bootstrapping problem
* as we must fetch all objectClasses to determine through inheritance which
* attributes this objectClass requires.
* @return array The array of required AttributeType objects.
*
* @see getMustAttrNames
* @see getMayAttrs
* @see getMayAttrNames
*/
function getMustAttrs($oclasses = NULL)
{
$all_must_attrs = array();
$all_must_attrs = $this->must_attrs;
foreach( $this->sup_classes as $sup_class)
{
if( $oclasses != null
&& $sup_class != "top"
&& isset( $oclasses[ strtolower($sup_class) ] ) ) {
$sup_class = $oclasses[ strtolower($sup_class) ];
$sup_class_must_attrs = $sup_class->getMustAttrs( $oclasses );
$all_must_attrs = array_merge( $sup_class_must_attrs, $all_must_attrs );
}
}
ksort($all_must_attrs);
return $all_must_attrs;
}
/**
* Gets an array of AttributeType objects that entries of this ObjectClass may define.
* This differs from getMayAttrNames in that it returns an array of AttributeType objects
*
* @param array $oclasses An array of ObjectClass objects to use when traversing
* the inheritance tree. This presents some what of a bootstrapping problem
* as we must fetch all objectClasses to determine through inheritance which
* attributes this objectClass provides.
* @return array The array of allowed AttributeType objects.
*
* @see getMustAttrNames
* @see getMustAttrs
* @see getMayAttrNames
* @see AttributeType
*/
function getMayAttrs($oclasses = NULL)
{
$all_may_attrs = array();
$all_may_attrs = $this->may_attrs;
foreach( $this->sup_classes as $sup_class_name )
{
if( $oclasses != null
&& $sup_class_name != "top"
&& isset( $oclasses[ strtolower($sup_class_name) ] ) ) {
$sup_class = $oclasses[ strtolower($sup_class_name) ];
$sup_class_may_attrs = $sup_class->getMayAttrs( $oclasses );
$all_may_attrs = array_merge( $sup_class_may_attrs, $all_may_attrs );
}
}
ksort($all_may_attrs);
return $all_may_attrs;
}
/**
* Gets an array of attribute names (strings) that entries of this ObjectClass must define.
* This differs from getMustAttrs in that it returns an array of strings rather than
* array of AttributeType objects
*
* @param array $oclasses An array of ObjectClass objects to use when traversing
* the inheritance tree. This presents some what of a bootstrapping problem
* as we must fetch all objectClasses to determine through inheritance which
* attributes this objectClass provides.
* @return array The array of allowed attribute names (strings).
*
* @see getMustAttrs
* @see getMayAttrs
* @see getMayAttrNames
*/
function getMustAttrNames( $oclasses = null )
{
$attrs = $this->getMustAttrs( $oclasses );
$attr_names = array();
foreach( $attrs as $attr )
$attr_names[] = $attr->getName();
return $attr_names;
}
/**
* Gets an array of attribute names (strings) that entries of this ObjectClass must define.
* This differs from getMayAttrs in that it returns an array of strings rather than
* array of AttributeType objects
*
* @param array $oclasses An array of ObjectClass objects to use when traversing
* the inheritance tree. This presents some what of a bootstrapping problem
* as we must fetch all objectClasses to determine through inheritance which
* attributes this objectClass provides.
* @return array The array of allowed attribute names (strings).
*
* @see getMustAttrs
* @see getMayAttrs
* @see getMustAttrNames
*/
function getMayAttrNames( $oclasses = null )
{
$attrs = $this->getMayAttrs( $oclasses );
$attr_names = array();
foreach( $attrs as $attr )
$attr_names[] = $attr->getName();
return $attr_names;
}
/**
* Adds an objectClass to the list of objectClasses that inherit
* from this objectClass.
* @param String $object_class_name The name of the objectClass to add
* @return bool Returns true on success or false on failure (objectclass already existed for example)
*/
function addChildObjectClass( $object_class_name )
{
$object_class_name = trim( $object_class_name );
if( ! is_array( $this->children_objectclasses ) )
$this->children_objectclasses = array();
foreach( $this->children_objectclasses as $existing_objectclass )
if( 0 == strcasecmp( $object_class_name, $existing_objectclass ) )
return false;
$this->children_objectclasses[] = $object_class_name;
return true;
}
/**
* Returns the array of objectClass names which inherit from this objectClass.
* @return Array Names of objectClasses which inherit from this objectClass.
*/
function getChildObjectClasses()
{
return $this->children_objectclasses;
}
/**
* Gets the name of this objectClass (ie, "inetOrgPerson")
* @return string The name of the objectClass
*/
function getName()
{
return $this->name;
}
/**
* Gets the objectClass names from which this objectClass inherits.
*
* @return array An array of objectClass names (strings)
*/
function getSupClasses()
{
return $this->sup_classes;
}
/**
* Gets the type of this objectClass: STRUCTURAL, ABSTRACT, or AUXILIARY.
*/
function getType()
{
return $this->type;
}
/**
* Gets whether this objectClass is flagged as obsolete by the LDAP server.
*/
function getIsObsolete()
{
return $this->is_obsolete;
}
/**
* Adds the specified array of attributes to this objectClass' list of
* MUST attributes. The resulting array of must attributes will contain
* unique members.
*
* @param array $new_must_attrs An array of attribute names (strings) to add.
*/
function addMustAttrs( $new_must_attrs )
{
if( ! is_array( $new_must_attrs ) )
return;
if( 0 == count( $new_must_attrs ) )
return;
$this->must_attrs = array_values( array_unique( array_merge( $this->must_attrs, $new_must_attrs ) ) );
}
/**
* Behaves identically to addMustAttrs, but it operates on the MAY
* attributes of this objectClass.
*
* @param array $new_may_attrs An array of attribute names (strings) to add.
*/
function addMayAttrs( $new_may_attrs )
{
if( ! is_array( $new_may_attrs ) )
return;
if( 0 == count( $new_may_attrs ) )
return;
$this->may_attrs = array_values( array_unique( array_merge( $this->may_attrs, $new_may_attrs ) ) );
}
}
/**
* A simple class for representing AttributeTypes used only by the ObjectClass class.
* Users should never instantiate this class. It represents an attribute internal to
* an ObjectClass. If PHP supported inner-classes and variable permissions, this would
* be interior to class ObjectClass and flagged private. The reason this class is used
* and not the "real" class AttributeType is because this class supports the notion of
* a "source" objectClass, meaning that it keeps track of which objectClass originally
* specified it. This class is therefore used by the class ObjectClass to determine
* inheritance.
*/
class ObjectClassAttribute
{
/** This Attribute's name */
var $name;
/** This Attribute's root */
var $source;
/**
* Creates a new ObjectClassAttribute with specified name and source objectClass.
* @param string $name the name of the new attribute.
* @param string $source the name of the ObjectClass which
* specifies this attribute.
*/
function ObjectClassAttribute ($name, $source)
{
$this->name=$name;
$this->source=$source;
}
/** Gets this attribute's name */
function getName ()
{
return $this->name;
}
/** Gets the name of the ObjectClass which originally specified this attribute. */
function getSource ()
{
return $this->source;
}
}
/**
* Represents an LDAP AttributeType
*/
class AttributeType extends SchemaItem
{
/** The name of this attributeType */
var $name;
/** string: the description */
var $is_obsolete;
/** The attribute from which this attribute inherits (if any) */
var $sup_attribute;
/** The equality rule used */
var $equality;
/** The ordering of the attributeType */
var $ordering;
/** Boolean: supports substring matching? */
var $sub_str;
/** The full syntax string, ie 1.2.3.4{16} */
var $syntax;
/** boolean: is single valued only? */
var $is_single_value;
/** boolean: is collective? */
var $is_collective;
/** boolean: can use modify? */
var $is_no_user_modification;
/** The usage string set by the LDAP schema */
var $usage;
/** An array of alias attribute names, strings */
var $aliases;
/** The max number of characters this attribute can be */
var $max_length;
/** A string description of the syntax type (taken from the LDAPSyntaxes) */
var $type;
/** An array of objectClasses which use this attributeType (must be set by caller) */
var $used_in_object_classes;
/** A list of object class names that require this attribute type. */
var $required_by_object_classes = array();
/**
* Initialize the class' member variables
*/
function initVars()
{
parent::initVars();
$this->oid = null;
$this->name = null;
$this->description = null;
$this->is_obsolete = false;
$this->sup_attribute = null;
$this->equality = null;
$this->ordering = null;
$this->sub_str = null;
$this->syntax_oid = null;
$this->syntax = null;
$this->max_length = null;
$this->is_single_value= null;
$this->is_collective = false;
$this->is_no_user_modification = false;
$this->usage = null;
$this->aliases = array();
$this->type = null;
$this->used_in_object_classes = array();
$this->required_by_object_classes = array();
}
/**
* Creates a new AttributeType objcet from a raw LDAP AttributeType string.
*/
function AttributeType( $raw_ldap_attr_string )
{
$this->initVars();
$attr = $raw_ldap_attr_string;
$strings = preg_split ("/[\s,]+/", $attr, -1,PREG_SPLIT_DELIM_CAPTURE);
for($i=0; $i<count($strings); $i++) {
switch($strings[$i]) {
case '(':
break;
case 'NAME':
if($strings[$i+1]!="(") {
do {
$i++;
if(strlen($this->name)==0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
// this attribute has no aliases
$this->aliases = array();
} else {
$i++;
do {
$i++;
if(strlen($this->name) == 0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
} while(!preg_match("/\'$/s", $strings[$i]));
// add alias names for this attribute
while($strings[++$i]!=")") {
$alias = $strings[$i];
$alias = preg_replace("/^\'/", "", $alias );
$alias = preg_replace("/\'$/", "", $alias );
$this->aliases[] = $alias;
}
}
break;
case 'DESC':
do {
$i++;
if(strlen($this->description)==0)
$this->description=$this->description . $strings[$i];
else
$this->description=$this->description . " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
break;
case 'OBSOLETE':
$this->is_obsolete = TRUE;
break;
case 'SUP':
$i++;
$this->sup_attribute = $strings[$i];
break;
case 'EQUALITY':
$i++;
$this->equality = $strings[$i];
break;
case 'ORDERING':
$i++;
$this->ordering = $strings[$i];
break;
case 'SUBSTR':
$i++;
$this->sub_str = $strings[$i];
break;
case 'SYNTAX':
$i++;
$this->syntax = $strings[$i];
$this->syntax_oid = preg_replace( "/{\d+}$/", "", $this->syntax );
// does this SYNTAX string specify a max length (ie, 1.2.3.4{16})
if( preg_match( "/{(\d+)}$/", $this->syntax, $this->max_length ) )
$this->max_length = $this->max_length[1];
else
$this->max_length = null;
if($i < count($strings) - 1 && $strings[$i+1]=="{") {
do {
$i++;
$this->name .= " " . $strings[$i];
} while($strings[$i]!="}");
}
break;
case 'SINGLE-VALUE':
$this->is_single_value = TRUE;
break;
case 'COLLECTIVE':
$this->is_collective = TRUE;
break;
case 'NO-USER-MODIFICATION':
$this->is_no_user_modification = TRUE;
break;
case 'USAGE':
$i++;
$this->usage = $strings[$i];
break;
default:
if(preg_match ("/[\d\.]+/i",$strings[$i]) && $i == 1)
$this->oid = $strings[$i];
}
}
$this->name = preg_replace("/^\'/", "", $this->name);
$this->name = preg_replace("/\'$/", "", $this->name);
$this->description = preg_replace("/^\'/", "", $this->description);
$this->description = preg_replace("/\'$/", "", $this->description);
$this->syntax_oid = preg_replace("/^\'/", "", $this->syntax_oid );
$this->syntax_oid = preg_replace("/\'$/", "", $this->syntax_oid );
}
/**
* Gets this attribute's name
* @return string
*/
function getName()
{
return $this->name;
}
/**
* Gets whether this attribute has been flagged as obsolete by the LDAP server
* @return bool
*/
function getIsObsolete()
{
return $this->is_obsolete;
}
/**
* Gets this attribute's usage string as defined by the LDAP server
* @return string
*/
function getUsage()
{
return $this->usage;
}
/**
* Gets this attribute's parent attribute (if any). If this attribute does not
* inherit from another attribute, null is returned.
* @return string
*/
function getSupAttribute()
{
return $this->sup_attribute;
}
/**
* Gets this attribute's equality string
* @return string
*/
function getEquality()
{
return $this->equality;
}
/**
* Gets this attribute's ordering specification.
* @return string
*/
function getOrdering()
{
return $this->ordering;
}
/**
* Gets this attribute's substring matching specification
* @return string
*/
function getSubstr()
{
return $this->sub_str;
}
/**
* Gets the names of attributes that are an alias for this attribute (if any).
* @return array An array of names of attributes which alias this attribute or
* an empty array if no attribute aliases this object.
*/
function getAliases()
{
return $this->aliases;
}
/**
* Returns whether the specified attribute is an alias for this one (based on this attribute's alias list).
* @param string $attr_name The name of the attribute to check.
* @return bool True if the specified attribute is an alias for this one, or false otherwise.
*/
function isAliasFor( $attr_name )
{
foreach( $this->aliases as $alias_attr_name )
if( 0 == strcasecmp( $alias_attr_name, $attr_name ) )
return true;
return false;
}
/**
* Gets this attribute's raw syntax string (ie: "1.2.3.4{16}").
* @return string The raw syntax string
*/
function getSyntaxString()
{
return $this->syntax;
}
/**
* Gets this attribute's syntax OID. Differs from getSyntaxString() in that this
* function only returns the actual OID with any length specification removed.
* Ie, if the syntax string is "1.2.3.4{16}", this function only retruns
* "1.2.3.4".
* @return string The syntax OID string.
*/
function getSyntaxOID()
{
return $this->syntax_oid;
}
/**
* Gets this attribute's the maximum length. If no maximum is defined by the LDAP server, null is returned.
* @return int The maximum length (in characters) of this attribute or null if no maximum is specified.
*/
function getMaxLength()
{
return $this->max_length;
}
/**
* Gets whether this attribute is single-valued. If this attribute only supports single values, true
* is returned. If this attribute supports multiple values, false is returned.
* @return bool Returns true if this attribute is single-valued or false otherwise.
*/
function getIsSingleValue()
{
return $this->is_single_value;
}
/**
* Sets whether this attribute is single-valued.
* @param bool $is_single_value
*/
function setIsSingleValue( $is_single_value )
{
$this->is_single_value = $is_single_value;
}
/**
* Gets whether this attribute is collective.
* @return bool Returns true if this attribute is collective and false otherwise.
*/
function getIsCollective()
{
return $this->is_collective;
}
/**
* Gets whether this attribute is not modifiable by users.
* @return bool Returns true if this attribute is not modifiable by users.
*/
function getIsNoUserModification()
{
return $this->is_no_user_modification;
}
/**
* Gets this attribute's type
* @return string The attribute's type.
*/
function getType()
{
return $this->type;
}
/**
* Removes an attribute name from this attribute's alias array.
* @param string $remove_alias_name The name of the attribute to remove.
* @return bool true on success or false on failure (ie, if the specified
* attribute name is not found in this attribute's list of aliases)
*/
function removeAlias( $remove_alias_name )
{
foreach( $this->aliases as $i => $alias_name ) {
if( 0 == strcasecmp( $alias_name, $remove_alias_name ) ) {
unset( $this->aliases[ $i ] );
$this->aliases = array_values( $this->aliases );
return true;
}
}
return false;
}
/**
* Adds an attribute name to the alias array.
* @param string $new_alias_name The name of a new attribute to add to this attribute's list of aliases.
*/
function addAlias( $new_alias_name )
{
$this->aliases[] = $new_alias_name;
}
/**
* Sets this attriute's name.
* @param string $new_name The new name to give this attribute.
*/
function setName( $new_name )
{
$this->name = $new_name;
}
/**
* Sets this attriute's SUP attribute (ie, the attribute from which this attribute inherits).
* @param string $new_sup_attr The name of the new parent (SUP) attribute
*/
function setSupAttribute( $new_sup_attr )
{
$this->sup_attribute = $new_sup_attr;
}
/**
* Sets this attribute's list of aliases.
* @param array $new_aliases The array of alias names (strings)
*/
function setAliases( $new_aliases )
{
$this->aliases = $new_aliases;
}
/**
* Sets this attribute's type.
* @param string $new_type The new type.
*/
function setType( $new_type )
{
$this->type = $new_type;
}
/**
* Adds an objectClass name to this attribute's list of "used in" objectClasses,
* that is the list of objectClasses which provide this attribute.
* @param string $object_class_name The name of the objectClass to add.
*/
function addUsedInObjectClass( $object_class_name )
{
foreach( $this->used_in_object_classes as $used_in_object_class )
if( 0 == strcasecmp( $used_in_object_class, $object_class_name ) )
return false;
$this->used_in_object_classes[] = $object_class_name;
return true;
}
/**
* Gets the list of "used in" objectClasses, that is the list of objectClasses
* which provide this attribute.
* @return array An array of names of objectclasses (strings) which provide this attribute
*/
function getUsedInObjectClasses()
{
return $this->used_in_object_classes;
}
/**
* Adds an objectClass name to this attribute's list of "required by" objectClasses,
* that is the list of objectClasses which must have this attribute.
* @param string $object_class_name The name of the objectClass to add.
*/
function addRequiredByObjectClass( $object_class_name )
{
foreach( $this->required_by_object_classes as $required_by_object_class )
if( 0 == strcasecmp( $required_by_object_class, $object_class_name ) )
return false;
$this->required_by_object_classes[] = $object_class_name;
return true;
}
/**
* Gets the list of "required by" objectClasses, that is the list of objectClasses
* which provide must have attribute.
* @return array An array of names of objectclasses (strings) which provide this attribute
*/
function getRequiredByObjectClasses()
{
return $this->required_by_object_classes;
}
}
/**
* Represents an LDAP Syntax
*/
class Syntax extends SchemaItem
{
/** Initializes the class' member variables */
function initVars()
{
parent::initVars();
$this->oid = null;
$this->description = null;
}
/**
* Creates a new Syntax object from a raw LDAP syntax string.
*/
function Syntax( $raw_ldap_syntax_string )
{
$this->initVars();
$class = $raw_ldap_syntax_string;
$strings = preg_split ("/[\s,]+/", $class, -1,PREG_SPLIT_DELIM_CAPTURE);
for($i=0; $i<count($strings); $i++) {
switch($strings[$i]) {
case '(':
break;
case 'DESC':
do {
$i++;
if(strlen($this->description)==0)
$this->description=$this->description . $strings[$i];
else
$this->description=$this->description . " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
break;
default:
if(preg_match ("/[\d\.]+/i",$strings[$i]) && $i == 1)
$this->oid = $strings[$i];
}
}
$this->description = preg_replace("/^\'/", "", $this->description);
$this->description = preg_replace("/\'$/", "", $this->description);
}
}
/**
* Represents an LDAP MatchingRule
*/
class MatchingRule extends SchemaItem
{
/** This rule's name */
var $name;
/** This rule's syntax OID */
var $syntax;
/** Boolean value indicating whether this MatchingRule is obsolete */
var $is_obsolete;
/** An array of attribute names who use this MatchingRule */
var $used_by_attrs;
/** Initialize the class' member variables */
function initVars()
{
parent::initVars();
$this->oid = null;
$this->name = null;
$this->description = null;
$this->is_obsolete = false;
$this->syntax = null;
$this->used_by_attrs = array();
}
/**
* Creates a new MatchingRule object from a raw LDAP MatchingRule string.
*/
function MatchingRule( $raw_ldap_matching_rule_string )
{
$this->initVars();
$strings = preg_split ("/[\s,]+/", $raw_ldap_matching_rule_string, -1,PREG_SPLIT_DELIM_CAPTURE);
for($i=0; $i<count($strings); $i++) {
switch($strings[$i]) {
case '(':
break;
case 'NAME':
if($strings[$i+1]!="(") {
do {
$i++;
if(strlen($this->name)==0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
} else {
$i++;
do {
$i++;
if(strlen($this->name) == 0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
} while(!preg_match("/\'$/s", $strings[$i]));
do {
$i++;
}while($strings[$i]!=")");
}
$this->name = preg_replace("/^\'/", "", $this->name);
$this->name = preg_replace("/\'$/", "", $this->name);
break;
case 'DESC':
do {
$i++;
if(strlen($this->description)==0)
$this->description=$this->description . $strings[$i];
else
$this->description=$this->description . " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
break;
case 'OBSOLETE':
$this->is_obsolete = TRUE;
break;
case 'SYNTAX':
$this->syntax = $strings[++$i];
break;
default:
if(preg_match ("/[\d\.]+/i",$strings[$i]) && $i == 1)
$this->oid = $strings[$i];
}
}
$this->description = preg_replace("/^\'/", "", $this->description);
$this->description = preg_replace("/\'$/", "", $this->description);
}
/**
* Sets the list of used_by_attrs to the array specified by $attrs;
* @param array $attrs The array of attribute names (strings) which use this MatchingRule
*/
function setUsedByAttrs( $attrs )
{
$this->used_by_attrs = $attrs;
}
/**
* Adds an attribute name to the list of attributes who use this MatchingRule
* @return true if the attribute was added and false otherwise (already in the list)
*/
function addUsedByAttr( $new_attr_name )
{
foreach( $this->used_by_attrs as $attr_name )
if( 0 == strcasecmp( $attr_name, $new_attr_name ) )
return false;
$this->used_by_attrs[] = $new_attr_name;
return true;
}
/**
* Gets this MatchingRule's name.
* @return string The name.
*/
function getName()
{
return $this->name;
}
/**
* Gets whether this MatchingRule is flagged as obsolete by the LDAP server.
* @return bool True if this MatchingRule is obsolete and false otherwise.
*/
function getIsObsolete()
{
return $this->is_obsolete;
}
/**
* Gets an array of attribute names (strings) which use this MatchingRule
* @return array The array of attribute names (strings).
*/
function getUsedByAttrs()
{
return $this->used_by_attrs;
}
}
/**
* Represents an LDAP schema matchingRuleUse entry
*/
class MatchingRuleUse extends SchemaItem
{
/** The name of the MathingRule this applies to */
var $name;
/** An array of attributeType names who make use of the mathingRule
* identified by $this->oid and $this->name */
var $used_by_attrs;
/** Initialize the class' member variables */
function initVars()
{
parent::initVars();
$this->oid = null;
$this->name = null;
$this->used_by_attrs = array();
}
function MatchingRuleUse( $raw_matching_rule_use_string )
{
$this->initVars();
$strings = preg_split ("/[\s,]+/", $raw_matching_rule_use_string, -1,PREG_SPLIT_DELIM_CAPTURE);
for($i=0; $i<count($strings); $i++) {
switch($strings[$i]) {
case '(':
break;
case 'NAME':
if($strings[$i+1]!="(") {
do {
$i++;
if( ! isset( $this->name ) || strlen( $this->name ) ==0 )
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
}while(!preg_match("/\'$/s", $strings[$i]));
} else {
$i++;
do {
$i++;
if(strlen($this->name) == 0)
$this->name = $strings[$i];
else
$this->name .= " " . $strings[$i];
} while(!preg_match("/\'$/s", $strings[$i]));
do {
$i++;
}while($strings[$i]!=")");
}
$this->name = preg_replace("/^\'/", "", $this->name);
$this->name = preg_replace("/\'$/", "", $this->name);
break;
case 'APPLIES':
if($strings[$i+1]!="(") {
// has a single attribute name
$i++;
$this->used_by_attrs = array( $strings[$i] );
//echo "Adding single: " . $strings[$i] . "<br />";
} else {
// has multiple attribute names
$i++;
while($strings[$i]!=")") {
$i++;
$new_attr = $strings[$i];
$new_attr = preg_replace("/^\'/", "", $new_attr );
$new_attr = preg_replace("/\'$/", "", $new_attr );
$this->used_by_attrs[] = $new_attr;
//echo "Adding $new_attr<br />";
$i++;
}
}
break;
default:
if(preg_match ("/[\d\.]+/i",$strings[$i]) && $i == 1)
$this->oid = $strings[$i];
}
}
sort( $this->used_by_attrs );
}
/**
* Gets this MatchingRuleUse's name
* @return string The name
*/
function getName()
{
return $this->name;
}
/**
* Gets an array of attribute names (strings) which use this MatchingRuleUse object.
* @return array The array of attribute names (strings).
*/
function getUsedByAttrs()
{
return $this->used_by_attrs;
}
}
/**
* Helper for _get_raw_schema() which fetches the DN of the schema object
* in an LDAP server based on a DN. Entries should set the subSchemaSubEntry
* attribute pointing to the DN of the server schema. You can specify the
* DN whose subSchemaSubEntry you wish to retrieve of specify an empty string
* to fetch the subScehamSubEntry from the Root DSE.
*
* @param string $dn The DN (may be null) which houses the subschemaSubEntry attribute which
* this function can use to determine the schema entry's DN.
* @param bool $debug Switch to true to see some nice and copious output. :)
*
* @return string The DN of the entry which houses this LDAP server's schema.
*/
function _get_schema_dn($dn, $debug=false )
{
if( $debug ) echo "<pre>";
$ds = $_SESSION['ldap']->server;
$search = @ldap_read( $ds, $dn, 'objectClass=*', array( 'subschemaSubentry' ) );
if( $debug ) { echo "Search result (ldap_read): "; var_dump( $search ); echo "\n"; }
if( ! $search ) {
if( $debug ) echo "_get_schema_dn() returning false. (search val is false)\n";
return false;
}
if( @ldap_count_entries( $ds, $search ) == 0 ) {
if( $debug ) echo "_get_schema_dn() returning false (ldap_count_entries() == 0).\n";
return false;
}
$entries = @ldap_get_entries( $ds, $search );
if( $debug ) { echo "Entries (ldap_get_entries): "; var_dump( $entries ); echo "\n"; }
if( ! $entries || ! is_array( $entries ) ) {
if( $debug ) echo "_get_schema_dn() returning false (Bad entries val, false or not array).\n";
return false;
}
$entry = isset( $entries[0] ) ? $entries[0] : false;
if( ! $entry ) {
if( $debug ) echo "_get_schema_dn() returning false (entry val is false)\n";
return false;
}
$sub_schema_sub_entry = isset( $entry[0] ) ? $entry[0] : false;
if( ! $sub_schema_sub_entry ) {
if( $debug ) echo "_get_schema_dn() returning false (sub_schema_sub_entry val is false)\n";
return false;
}
$schema_dn = isset( $entry[ $sub_schema_sub_entry ][0] ) ?
$entry[ $sub_schema_sub_entry ][0] :
false;
if( $debug ) echo "_get_schema_dn() returning: \"" . $schema_dn . "\"\n";
return $schema_dn;
}
/**
* Fetches the raw schema array for the subschemaSubentry of the server. Note,
* this function has grown many hairs to accomodate more LDAP servers. It is
* needfully complicated as it now supports many popular LDAP servers that
* don't necessarily expose their schema "the right way".
*
* @param $schema_to_fetch - A string indicating which type of schema to
* fetch. Five valid values: 'objectclasses', 'attributetypes',
* 'ldapsyntaxes', 'matchingruleuse', or 'matchingrules'.
* Case insensitive.
* @param $dn (optional) This paremeter is the DN of the entry whose schema you
* would like to fetch. Entries have the option of specifying
* their own subschemaSubentry that points to the DN of the system
* schema entry which applies to this attribute. If unspecified,
* this will try to retrieve the schema from the RootDSE subschemaSubentry.
* Failing that, we use some commonly known schema DNs. Default
* value is the Root DSE DN (zero-length string)
* @return an array of strings of this form:
* Array (
* [0] => "( 1.3.6.1.4.1.7165.1.2.2.4 NAME 'gidPool' DESC 'Pool ...
* [1] => "( 1.3.6.1.4.1.7165.2.2.3 NAME 'sambaAccount' DESC 'Sa ...
* etc.
*/
function _get_raw_schema($schema_to_fetch, $dn='' )
{
// Swith to true to enable verbose output of schema fetching progress
$debug = false;
$ds = $_SESSION['ldap']->server;
// error checking
$schema_to_fetch = strtolower( $schema_to_fetch );
$valid_schema_to_fetch = array( 'objectclasses', 'attributetypes', 'ldapsyntaxes',
'matchingrules', 'matchingruleuse' );
if( ! in_array( $schema_to_fetch, $valid_schema_to_fetch ) )
// This error message is not localized as only developers should ever see it
echo( "Bad parameter provided to function to _get_raw_schema(). '"
. htmlspecialchars( $schema_to_fetch ) . "' is
not valid for the schema_to_fetch parameter." );
// Try to get the schema DN from the specified entry.
$schema_dn = _get_schema_dn($dn, $debug );
// Do we need to try again with the Root DSE?
if( ! $schema_dn )
$schema_dn = _get_schema_dn('', $debug );
// Store the eventual schema retrieval in $schema_search
$schema_search = null;
if( $schema_dn ) {
if( $debug ) { echo "Found the schema DN: "; var_dump( $schema_dn ); echo "\n"; }
$schema_search = @ldap_read( $ds, $schema_dn, '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0,
LDAP_DEREF_ALWAYS );
// Were we not able to fetch the schema from the $schema_dn?
$schema_entries = @ldap_get_entries( $ds, $schema_search );
if( $schema_search === false ||
0 == @ldap_count_entries( $ds, $schema_search ) ||
! isset( $schema_entries[0][$schema_to_fetch] ) ) {
if( $debug ) echo "Did not find the schema with (objectClass=*). Attempting with (objetClass=subschema)\n";
// Try again with a different filter (some servers require (objectClass=subschema) like M-Vault)
$schema_search = @ldap_read( $ds, $schema_dn, '(objectClass=subschema)',
array( $schema_to_fetch ), 0, 0, 0,
LDAP_DEREF_ALWAYS );
$schema_entries = @ldap_get_entries( $ds, $schema_search );
// Still didn't get it?
if( $schema_search === false ||
0 == @ldap_count_entries( $ds, $schema_search ) ||
! isset( $schema_entries[0][$schema_to_fetch] ) ) {
if( $debug ) echo "Did not find the schema at DN: $schema_dn (with objectClass=* nor objectClass=subschema).\n";
unset( $schema_entries );
unset( $schema_dn );
$schema_search = null;
} else {
if( $debug ) echo "Found the schema at DN: $schema_dn (with objectClass=subschema).\n";
}
} else {
if( $debug ) echo "Found the schema at DN: $schema_dn (with objectClass=*).\n";
}
}
// Second chance: If the DN or Root DSE didn't give us the subschemaSubentry, ie $schema_search
// is still null, use some common subSchemaSubentry DNs as a work-around.
if( $debug && $schema_search == null )
echo "Attempting work-arounds for 'broken' LDAP servers...\n";
// cn=subschema for OpenLDAP
if( $schema_search == null ) {
if( $debug ) echo "Attempting with cn=subschema (OpenLDAP)...\n";
// try with the standard DN
$schema_search = @ldap_read($ds, 'cn=subschema', '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0, LDAP_DEREF_ALWAYS );
}
// cn=schema for Novell eDirectory
if( $schema_search == null ) {
if( $debug ) echo "Attempting with cn=schema (Novell)...\n";
// try again, with a different schema DN
$schema_search = @ldap_read($ds, 'cn=schema', '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0, LDAP_DEREF_ALWAYS );
}
// cn=schema,cn=configuration,dc=example,dc=com for ActiveDirectory
if( $schema_search == null ) {
// try again, with a different schema DN
global $servers;
$base_dn = isset( $servers[ 'base' ] ) ?
$servers[ 'base' ] :
null;
if( $debug ) echo "Attempting with cn=schema,cn=configuration,$base_dn (ActiveDirectory)...\n";
if( $base_dn != null )
$schema_search = @ldap_read($ds, 'cn=schema,cn=configuration,' . $base_dn, '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0, LDAP_DEREF_ALWAYS );
}
// cn=Schema,ou=Admin,dc=example,dc=com for SiteServer
if( $schema_search == null ) {
// try again, with a different schema DN
global $servers;
$base_dn = isset( $servers[ 'base' ] ) ?
$servers[ 'base' ] :
null;
if( $debug ) echo "Attempting with cn=Schema,ou=Admin,$base_dn (ActiveDirectory)...\n";
if( $base_dn != null )
$schema_search = @ldap_read($ds, 'cn=Schema,ou=Admin,' . $base_dn, '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0, LDAP_DEREF_ALWAYS );
}
// Attempt to pull schema from Root DSE with scope "base"
if( $schema_search == null ) {
// try again, with a different schema DN
if( $debug ) echo "Attempting to pull schema from Root DSE with scope \"base\"...\n";
if( $base_dn != null )
$schema_search = @ldap_read($ds, '', '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0, LDAP_DEREF_ALWAYS );
$schema_entries = @ldap_get_entries( $ds, $schema_search );
if( ! isset( $schema_entries[0][$schema_to_fetch] ) )
$schema_search = null;
}
// Attempt to pull schema from Root DSE with scope "one" (work-around for Isode M-Vault X.500/LDAP)
if( $schema_search == null ) {
// try again, with a different schema DN
if( $debug ) echo "Attempting to pull schema from Root DSE with scope \"one\"...\n";
if( $base_dn != null )
$schema_search = @ldap_list($ds, '', '(objectClass=*)',
array( $schema_to_fetch ), 0, 0, 0, LDAP_DEREF_ALWAYS );
$schema_entries = @ldap_get_entries( $ds, $schema_search );
if( ! isset( $schema_entries[0][$schema_to_fetch] ) )
$schema_search = null;
}
// Shall we just give up?
if( $schema_search == null ) {
if( $debug ) echo "Returning false since schema_search came back null</pre>\n";
set_schema_cache_unavailable();
return false;
}
// Did we get something unrecognizable?
if( 'resource' != gettype( $schema_search ) ) {
if( $debug ) echo "Returning false since schema_esarch is not of type 'resource'. Dumping schema search:\n";
if( $debug ) var_dump( $schema_search );
if( $debug ) echo "</pre>";
set_schema_cache_unavailable();
return false;
}
$schema = @ldap_get_entries( $ds, $schema_search );
if( $schema == false ) {
if( $debug ) echo "Returning false since ldap_get_entries() returned false.</pre>\n";
set_schema_cache_unavailable();
return false;
}
if( ! isset( $schema[0][$schema_to_fetch] ) ) {
if( $debug ) echo "Returning false since '$schema_to_fetch' isn't in the schema array. Showing schema array:\n";
if( $debug ) var_dump( $schema );
if( $debug ) echo "</pre>";
set_schema_cache_unavailable();
return false;
}
// Make a nice array of this form:
// Array (
// [0] => "( 1.3.6.1.4.1.7165.1.2.2.4 NAME 'gidPool' DESC 'Pool ...
// [1] => "( 1.3.6.1.4.1.7165.2.2.3 NAME 'sambaAccount' DESC 'Sa ...
// etc.
$schema = $schema[0][$schema_to_fetch];
unset( $schema['count'] );
if( $debug ) echo "</pre>";
return $schema;
}
/**
* Gets an associative array of ObjectClass objects for the specified
* server. Each array entry's key is the name of the objectClass
* in lower-case and the value is an ObjectClass object.
*
* @param string $dn (optional) It is easier to fetch schema if a DN is provided
* which defines the subschemaSubEntry attribute (all entries should).
*
* @return array An array of ObjectClass objects.
*
* @see ObjectClass
* @see get_schema_objectclass
*/
function get_schema_objectclasses($dn=null, $use_cache=true )
{
if( $use_cache && cached_schema_available('objectclasses' ) ) {
return get_cached_schema('objectclasses' );
}
$raw_oclasses = _get_raw_schema('objectclasses', $dn );
if( ! $raw_oclasses )
return false;
// build the array of objectClasses
$object_classes = array();
foreach( $raw_oclasses as $class_string ) {
if( $class_string == null || 0 == strlen( $class_string ) )
continue;
$object_class = new ObjectClass( $class_string );
$name = $object_class->getName();
$key = strtolower( $name );
$object_classes[ $key ] = $object_class;
}
ksort( $object_classes );
// cache the schema to prevent multiple schema fetches from LDAP server
set_cached_schema('objectclasses', $object_classes );
return( $object_classes );
}
/**
* Gets a single ObjectClass object specified by name.
*
* @param string $oclass_name The name of the objectClass to fetch.
* @param string $dn (optional) It is easier to fetch schema if a DN is provided
* which defines the subschemaSubEntry attribute (all entries should).
*
* @return ObjectClass The specified ObjectClass object or false on error.
*
* @see ObjectClass
* @see get_schema_objectclasses
*/
function get_schema_objectclass($oclass_name, $dn=null, $use_cache=true )
{
$oclass_name = strtolower( $oclass_name );
$oclasses = get_schema_objectclasses($dn, $use_cache );
if( ! $oclasses )
return false;
if( isset( $oclasses[ $oclass_name ] ) )
return $oclasses[ $oclass_name ];
else
return false;
}
/**
* Gets a single AttributeType object specified by name.
*
* @param string $oclass_name The name of the AttributeType to fetch.
* @param string $dn (optional) It is easier to fetch schema if a DN is provided
* which defines the subschemaSubEntry attribute (all entries should).
*
* @return AttributeType The specified AttributeType object or false on error.
*
* @see AttributeType
* @see get_schema_attributes
*/
function get_schema_attribute($attr_name, $dn=null, $use_cache=true )
{
$attr_name = real_attr_name( $attr_name );
$schema_attrs = get_schema_attributes($dn, $use_cache );
$attr_name = strtolower( $attr_name );
$schema_attr = isset( $schema_attrs[ $attr_name ] ) ?
$schema_attrs[ $attr_name ] :
false;
return $schema_attr;
}
/**
* Gets an associative array of AttributeType objects for the specified
* server. Each array entry's key is the name of the attributeType
* in lower-case and the value is an AttributeType object.
*
* @param string $dn (optional) It is easier to fetch schema if a DN is provided
* which defines the subschemaSubEntry attribute (all entries should).
*
* @return array An array of AttributeType objects.
*/
function get_schema_attributes($dn = null, $use_cache=true )
{
if( $use_cache && cached_schema_available('attributetypes' ) ) {
return get_cached_schema('attributetypes' );
}
$raw_attrs = _get_raw_schema('attributeTypes', $dn );
if( ! $raw_attrs )
return false;
// build the array of attribueTypes
$syntaxes = get_schema_syntaxes($dn );
$attrs = array();
/**
* bug 856832: create two arrays - one indexed by name (the standard
* $attrs array above) and one indexed by oid (the new $attrs_oid array
* below). This will help for directory servers, like IBM's, that use OIDs
* in their attribute definitions of SUP, etc
*/
$attrs_oid = array();
foreach( $raw_attrs as $attr_string ) {
if( $attr_string == null || 0 == strlen( $attr_string ) )
continue;
$attr = new AttributeType( $attr_string );
if( isset( $syntaxes[ $attr->getSyntaxOID() ] ) ) {
$syntax = $syntaxes[ $attr->getSyntaxOID() ];
$attr->setType( $syntax->getDescription() );
}
$name = $attr->getName();
$key = strtolower( $name );
$attrs[ $key ] = $attr;
/**
* bug 856832: create an entry in the $attrs_oid array too. This
* will be a ref to the $attrs entry for maintenance and performance
* reasons
*/
$oid = $attr->getOID();
$attrs_oid[ $oid ] = &$attrs[ $key ];
}
add_aliases_to_attrs( $attrs );
/**
* bug 856832: pass the $attrs_oid array as a second (new) parameter
* to add_sup_to_attrs. This will allow lookups by either name or oid.
*/
add_sup_to_attrs( $attrs, $attrs_oid );
ksort( $attrs );
// Add the used in and required_by values.
$schema_object_classes = get_schema_objectclasses();
if ( ! is_array ( $schema_object_classes ) )
return array ();
foreach( $schema_object_classes as $object_class ) {
$must_attrs = $object_class->getMustAttrNames($schema_object_classes);
$may_attrs = $object_class->getMayAttrNames($schema_object_classes);
$oclass_attrs = array_unique( array_merge( $must_attrs, $may_attrs ) );
// Add Used In.
foreach( $oclass_attrs as $attr_name ) {
if( isset( $attrs[ strtolower( $attr_name ) ] ) ) {
$attrs[ strtolower( $attr_name ) ]->addUsedInObjectClass(
$object_class->getName() );
} else {
//echo "Warning, attr not set: $attr_name<br />";
}
}
// Add Required By.
foreach( $must_attrs as $attr_name ) {
if( isset( $attrs[ strtolower( $attr_name ) ] ) ) {
$attrs[ strtolower( $attr_name ) ]->addRequiredByObjectClass(
$object_class->getName() );
} else {
//echo "Warning, attr not set: $attr_name<br />";
}
}
}
// cache the schema to prevent multiple schema fetches from LDAP server
set_cached_schema('attributetypes', $attrs );
return( $attrs );
}
/**
* For each attribute that has multiple names, this function adds unique entries to
* the attrs array for those names. Ie, attributeType has name 'gn' and 'givenName'.
* This function will create a unique entry for 'gn' and 'givenName'.
*/
function add_aliases_to_attrs( &$attrs )
{
// go back and add data from aliased attributeTypes
foreach( $attrs as $name => $attr ) {
$aliases = $attr->getAliases();
if( is_array( $aliases ) && count( $aliases ) > 0 ) {
// foreach of the attribute's aliases, create a new entry in the attrs array
// with its name set to the alias name, and all other data copied
foreach( $aliases as $alias_attr_name ) {
$new_attr = $attr;
$new_attr->setName( $alias_attr_name );
$new_attr->addAlias( $attr->getName() );
$new_attr->removeAlias( $alias_attr_name );
$new_attr_key = strtolower( $alias_attr_name );
$attrs[ $new_attr_key ] = $new_attr;
}
}
}
}
/**
* Adds inherited values to each attributeType specified by the SUP directive.
* Supports infinite levels of inheritance.
* Bug 856832: require a second paramter that has all attributes indexed by OID
*/
function add_sup_to_attrs( &$attrs, &$attrs_oid )
{
$debug = false;
if( $debug ) echo "<pre>";
if( $debug ) print_r( $attrs );
// go back and add any inherited descriptions from parent attributes (ie, cn inherits name)
foreach( $attrs as $key => $attr ) {
if( $debug ) echo "Analyzing inheritance for attribute '" . $attr->getName() . "'\n";
$sup_attr_name = $attr->getSupAttribute();
$sup_attr = null;
// Does this attribute have any inheritance happening here?
if( null != trim( $sup_attr_name ) ) {
// This loop really should traverse infinite levels of inheritance (SUP) for attributeTypes,
// but just in case we get carried away, stop at 100. This shouldn't happen, but for
// some weird reason, we have had someone report that it has happened. Oh well.
$i = 0;
while( $i++ < 100 /** 100 == INFINITY ;) */ ) {
if( $debug ) echo "Top of loop.\n";
/**
* Bug 856832: check if sup is indexed by OID. If it is,
* replace the OID with the appropriate name. Then reset
* $sup_attr_name to the name instead of the OID. This will
* make all the remaining code in this function work as
* expected.
*/
if( isset( $attrs_oid[$sup_attr_name] ) ) {
$attr->setSupAttribute( $attrs_oid[$sup_attr_name]->getName() );
$sup_attr_name = $attr->getSupAttribute();
}
if( ! isset( $attrs[ strtolower( $sup_attr_name ) ] ) ){
echo( "Schema error: attributeType '" . $attr->getName() . "' inherits from
'" . $sup_attr_name . "', but attributeType '" . $sup_attr_name . "' does not
exist." );
return;
}
if( $debug ) echo " sup_attr_name: $sup_attr_name\n";
$sup_attr = $attrs[ strtolower( $sup_attr_name ) ];
if( $debug ) echo " Sup attr: " . $sup_attr->getName() . "\n";
$sup_attr_name = $sup_attr->getSupAttribute();
if( $debug ) echo " Does the sup attr itself have a sup attr?\n";
// Does this superior attributeType not have a superior attributeType?
if( null == $sup_attr_name || strlen( trim( $sup_attr_name ) ) == 0 ) {
// Since this attribute's superior attribute does not have another superior
// attribute, clone its properties for this attribute. Then, replace
// those cloned values with those that can be explicitly set by the child
// attribute attr). Save those few properties which the child can set here:
if( $debug ) echo " nope, this is the end of the inheritance chain after $i iterations.\n";
$tmp_name = $attr->getName();
$tmp_oid = $attr->getOID();
$tmp_sup = $attr->getSupAttribute();
$tmp_aliases = $attr->getAliases();
$tmp_single_val = $attr->getIsSingleValue();
if( $debug ) {
echo " populating values into attribute from sup attribute:\n";
echo "Before: ";
print_r( $attr );
}
// clone the SUP attributeType and populate those values
// that were set by the child attributeType
$attr = $sup_attr;
$attr->setOID( $tmp_oid );
$attr->setName( $tmp_name );
$attr->setSupAttribute( $tmp_sup);
$attr->setAliases( $tmp_aliases );
if( $debug ) {
echo "After (name, sup_attr, and aliases should not have changed!: ";
print_r( $attr );
}
// only overwrite the SINGLE-VALUE property if the child explicitly sets it
// (note: All LDAP attributes default to multi-value if not explicitly set SINGLE-VALUE)
if( true == $tmp_single_val )
$attr->setIsSingleValue( true );
// replace this attribute in the attrs array now that we have populated
// new values therein
$attrs[$key] = $attr;
// very important: break out after we are done with this attribute
$sup_attr_name = null;
$sup_attr = null;
break;
} else {
// do nothing, move on down the chain of inheritance...
if( $debug ) echo " yup, march down the inheritance chain (iteration $i).\n";
if( $debug ) { echo " The sup attr is: "; var_dump( $sup_attr_name ); echo "\n"; }
}
}
}
}
if( $debug ) echo "</pre>\n";
}
/**
* Returns an array of MatchingRule objects for the specified server.
* The key of each entry is the OID of the matching rule.
*/
function get_schema_matching_rules($dn=null, $use_cache=true )
{
if( $use_cache && cached_schema_available('matchingrules' ) ) {
return get_cached_schema('matchingrules' );
}
// build the array of MatchingRule objects
$raw_matching_rules = _get_raw_schema('matchingRules', $dn );
if( ! $raw_matching_rules )
return false;
$rules = array();
foreach( $raw_matching_rules as $rule_string ) {
if( $rule_string == null || 0 == strlen( $rule_string ) )
continue;
$rule = new MatchingRule( $rule_string );
$key = strtolower( $rule->getName() );
$rules[ $key ] = $rule;
}
ksort( $rules );
// For each MatchingRuleUse entry, add the attributes who use it to the
// MatchingRule in the $rules array.
$raw_matching_rule_use = _get_raw_schema('matchingRuleUse' );
if( $raw_matching_rule_use != false ) {
foreach( $raw_matching_rule_use as $rule_use_string ) {
if( $rule_use_string == null || 0 == strlen( $rule_use_string ) )
continue;
$rule_use = new MatchingRuleUse( $rule_use_string );
$key = strtolower( $rule_use->getName() );
if( isset( $rules[ $key ] ) )
$rules[ $key ]->setUsedByAttrs( $rule_use->getUsedByAttrs() );
}
} else {
// No MatchingRuleUse entry in the subschema, so brute-forcing
// the reverse-map for the "$rule->getUsedByAttrs()" data.
$attrs = get_schema_attributes($dn );
if( is_array( $attrs ) )
foreach( $attrs as $attr ) {
$rule_key = strtolower( $attr->getEquality() );
if( isset( $rules[ $rule_key ] ) )
$rules[ $rule_key ]->addUsedByAttr( $attr->getName() );
}
}
// cache the schema to prevent multiple schema fetches from LDAP server
set_cached_schema('matchingrules', $rules );
return $rules;
}
/**
* Returns an array of Syntax objects that this LDAP server uses mapped to
* their descriptions. The key of each entry is the OID of the Syntax.
*/
function get_schema_syntaxes($dn=null, $use_cache=true )
{
if( $use_cache && cached_schema_available('ldapsyntaxes' ) ) {
return get_cached_schema('ldapsyntaxes' );
}
$raw_syntaxes = _get_raw_schema('ldapSyntaxes', $dn );
if( ! $raw_syntaxes )
return false;
// build the array of attributes
$syntaxes = array();
foreach( $raw_syntaxes as $syntax_string ) {
$syntax = new Syntax( $syntax_string );
$key = strtolower( trim( $syntax->getOID() ) );
if( ! $key ) continue;
$syntaxes[$key] = $syntax;
}
ksort( $syntaxes );
// cache the schema to prevent multiple schema fetches from LDAP server
set_cached_schema('ldapsyntaxes', $syntaxes );
return $syntaxes;
}
// --------------------------------------------------------------------
// Schema caching functions
// --------------------------------------------------------------------
/**
* Returns true if the schema for $schema_type has been cached and
* is availble. $schema_type may be one of (lowercase) the following:
* objectclasses
* attributetypes
* ldapsyntaxes
* matchingrules
* matchingruleuse
* Note that _get_raw_schema() takes a similar parameter.
*/
function cached_schema_available($schema_type )
{
// Check config to make sure session-based caching is enabled.
if( ! SCHEMA_SESSION_CACHE_ENABLED )
return false;
// Static memory cache available?
// (note: this memory cache buys us a 20% speed improvement over strictly
// checking the session, ie 0.05 to 0.04 secs)
$schema_type = strtolower( $schema_type );
static $cache_avail;
if( isset( $cache_avail[ $schema_type ] ) ) {
return true;
}
// Session cache available?
if( isset( $_SESSION[ 'schema' ][ $schema_type ] ) ) {
$cache_avail[ $schema_type ] = true;
return true;
} elseif ( isset( $_SESSION[ 'schema' ][ 'unavailable'] ) ) {
return true;
} else {
return false;
}
}
/**
* Returns the cached array of schemaitem objects for the specified
* $schema_type. For list of valid $schema_type values, see above
* schema_cache_available(). Note that internally, this function
* utilizes a two-layer cache, one in memory using a static variable
* for multiple calls within the same page load, and one in a session
* for multiple calls within the same user session (spanning multiple
* page loads).
*
* Returns an array of SchemaItem objects on success or false on failure.
*/
function get_cached_schema($schema_type )
{
// Check config to make sure session-based caching is enabled.
if( ! SCHEMA_SESSION_CACHE_ENABLED )
return false;
static $cache;
$schema_type = strtolower( $schema_type );
if( isset( $cache[ $schema_type ] ) ) {
//echo "Getting memory-cached schema for \"$schema_type\"...<br />\n";
return $cache[ $schema_type ];
}
//echo "Getting session-cached schema for \"$schema_type\"...<br />\n";
if( cached_schema_available($schema_type ) && array_key_exists ( $schema_type, $_SESSION[ 'schema' ] ) ) {
$schema = $_SESSION[ 'schema' ][ $schema_type ];
$cache[ $schema_type ] = $schema;
return $schema;
} else {
return false;
}
}
/**
* Caches the specified $schema_type.
* $schema_items should be an array of SchemaItem instances (ie,
* an array of ObjectClass, AttributeType, LDAPSyntax, MatchingRuleUse,
* or MatchingRule objects.
*
* Returns true on success of false on failure.
*/
function set_cached_schema($schema_type, $schema_items )
{
// Check config to make sure session-based caching is enabled.
if( ! SCHEMA_SESSION_CACHE_ENABLED )
return false;
//echo "Setting cached schema for \"$schema_type\"...<br />\n";
// Sanity check. The schema must be in the form of an array
if( ! is_array( $schema_items ) ) {
die( "While attempting to cache schema, passed a non-array for \$schema_items!" );
}
// Make sure we are being passed a valid array of schema_items
foreach( $schema_items as $schema_item ) {
if( ! is_subclass_of( $schema_item, 'SchemaItem' ) &&
! 0 == strcasecmp( 'SchemaItem', get_class( $schema_item ) ) ) {
die( "While attempting to cache schema, one of the schema items passed is not a true SchemaItem instance!" );
}
}
$schema_type = strtolower( $schema_type );
$_SESSION[ 'schema' ][ $schema_type ] = $schema_items;
return true;
}
/**
* Sets the schema entry for the server_id to be "unavailable" so that we realize
* that we tried to get the schema but could not, so quit trying next time to
* fetch it from the server.
*/
function set_schema_cache_unavailable()
{
if( ! SCHEMA_SESSION_CACHE_ENABLED )
return false;
$_SESSION['schema']['unavailable'] = true;
return true;
}
?>
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