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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This package provides LDAP client functions.
package ldap
import (
"github.com/mmitton/asn1-ber"
"fmt"
)
const (
ControlTypePaging = "1.2.840.113556.1.4.319"
)
var ControlTypeMap = map[ string ] string {
ControlTypePaging : "Paging",
}
type Control interface {
GetControlType() string
Encode() *ber.Packet
String() string
}
type ControlString struct {
ControlType string
Criticality bool
ControlValue string
}
func (c *ControlString) GetControlType() string {
return c.ControlType
}
func (c *ControlString) Encode() (p *ber.Packet) {
p = ber.Encode( ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Control" )
p.AppendChild( ber.NewString( ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, c.ControlType, "Control Type (" + ControlTypeMap[ c.ControlType ] + ")" ) )
if c.Criticality {
p.AppendChild( ber.NewBoolean( ber.ClassUniversal, ber.TypePrimative, ber.TagBoolean, c.Criticality, "Criticality" ) )
}
p.AppendChild( ber.NewString( ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, c.ControlValue, "Control Value" ) )
return
}
func (c *ControlString) String() string {
return fmt.Sprintf( "Control Type: %s (%q) Criticality: %s Control Value: %s", ControlTypeMap[ c.ControlType ], c.ControlType, c.Criticality, c.ControlValue )
}
type ControlPaging struct {
PagingSize uint32
Cookie []byte
}
func (c *ControlPaging) GetControlType() string {
return ControlTypePaging
}
func (c *ControlPaging) Encode() (p *ber.Packet) {
p = ber.Encode( ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Control" )
p.AppendChild( ber.NewString( ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, ControlTypePaging, "Control Type (" + ControlTypeMap[ ControlTypePaging ] + ")" ) )
p2 := ber.Encode( ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, nil, "Control Value (Paging)" )
seq := ber.Encode( ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Search Control Value" )
seq.AppendChild( ber.NewInteger( ber.ClassUniversal, ber.TypePrimative, ber.TagInteger, uint64(c.PagingSize), "Paging Size" ) )
cookie := ber.Encode( ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, nil, "Cookie" )
cookie.Value = c.Cookie
cookie.Data.Write( c.Cookie )
seq.AppendChild( cookie )
p2.AppendChild( seq )
p.AppendChild( p2 )
return
}
func (c *ControlPaging) String() string {
return fmt.Sprintf(
"Control Type: %s (%q) Criticality: %s PagingSize: %d Cookie: %q",
ControlTypeMap[ ControlTypePaging ],
ControlTypePaging,
false,
c.PagingSize,
c.Cookie )
}
func (c *ControlPaging) SetCookie( Cookie []byte ) {
c.Cookie = Cookie
}
func FindControl( Controls []Control, ControlType string ) Control {
for _, c := range Controls {
if c.GetControlType() == ControlType {
return c
}
}
return nil
}
func DecodeControl( p *ber.Packet ) Control {
ControlType := p.Children[ 0 ].Value.(string)
Criticality := false
p.Children[ 0 ].Description = "Control Type (" + ControlTypeMap[ ControlType ] + ")"
value := p.Children[ 1 ]
if len( p.Children ) == 3 {
value = p.Children[ 2 ]
p.Children[ 1 ].Description = "Criticality"
Criticality = p.Children[ 1 ].Value.(bool)
}
value.Description = "Control Value"
switch ControlType {
case ControlTypePaging:
value.Description += " (Paging)"
c := new( ControlPaging )
if value.Value != nil {
value_children := ber.DecodePacket( value.Data.Bytes() )
value.Data.Truncate( 0 )
value.Value = nil
value.AppendChild( value_children )
}
value = value.Children[ 0 ]
value.Description = "Search Control Value"
value.Children[ 0 ].Description = "Paging Size"
value.Children[ 1 ].Description = "Cookie"
c.PagingSize = uint32( value.Children[ 0 ].Value.(uint64) )
c.Cookie = value.Children[ 1 ].Data.Bytes()
value.Children[ 1 ].Value = c.Cookie
return c
}
c := new( ControlString )
c.ControlType = ControlType
c.Criticality = Criticality
c.ControlValue = value.Value.(string)
return c
}
func NewControlString( ControlType string, Criticality bool, ControlValue string ) *ControlString {
return &ControlString{
ControlType: ControlType,
Criticality: Criticality,
ControlValue: ControlValue,
}
}
func NewControlPaging( PagingSize uint32 ) *ControlPaging {
return &ControlPaging{ PagingSize: PagingSize }
}
func encodeControls( Controls []Control ) *ber.Packet {
p := ber.Encode( ber.ClassContext, ber.TypeConstructed, 0, nil, "Controls" )
for _, control := range Controls {
p.AppendChild( control.Encode() )
}
return p
}
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