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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 (
"fmt"
"github.com/tmfkams/asn1-ber"
)
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() *ber.Packet {
packet := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Control")
packet.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, c.ControlType, "Control Type ("+ControlTypeMap[c.ControlType]+")"))
if c.Criticality {
packet.AppendChild(ber.NewBoolean(ber.ClassUniversal, ber.TypePrimative, ber.TagBoolean, c.Criticality, "Criticality"))
}
packet.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimative, ber.TagOctetString, c.ControlValue, "Control Value"))
return packet
}
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() *ber.Packet {
packet := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Control")
packet.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)
packet.AppendChild(p2)
return packet
}
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(packet *ber.Packet) Control {
ControlType := packet.Children[0].Value.(string)
Criticality := false
packet.Children[0].Description = "Control Type (" + ControlTypeMap[ControlType] + ")"
value := packet.Children[1]
if len(packet.Children) == 3 {
value = packet.Children[2]
packet.Children[1].Description = "Criticality"
Criticality = packet.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 {
packet := ber.Encode(ber.ClassContext, ber.TypeConstructed, 0, nil, "Controls")
for _, control := range Controls {
packet.AppendChild(control.Encode())
}
return packet
}
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