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// Copyright 2014 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.
//
// File contains Modify functionality
//
// https://tools.ietf.org/html/rfc4511
//
// ModifyRequest ::= [APPLICATION 6] SEQUENCE {
// object LDAPDN,
// changes SEQUENCE OF change SEQUENCE {
// operation ENUMERATED {
// add (0),
// delete (1),
// replace (2),
// ... },
// modification PartialAttribute } }
//
// PartialAttribute ::= SEQUENCE {
// type AttributeDescription,
// vals SET OF value AttributeValue }
//
// AttributeDescription ::= LDAPString
// -- Constrained to <attributedescription>
// -- [RFC4512]
//
// AttributeValue ::= OCTET STRING
//
package ldap
import (
"errors"
"log"
"gopkg.in/asn1-ber.v1"
)
const (
AddAttribute = 0
DeleteAttribute = 1
ReplaceAttribute = 2
)
type PartialAttribute struct {
attrType string
attrVals []string
}
func (p *PartialAttribute) encode() *ber.Packet {
seq := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "PartialAttribute")
seq.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimitive, ber.TagOctetString, p.attrType, "Type"))
set := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSet, nil, "AttributeValue")
for _, value := range p.attrVals {
set.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimitive, ber.TagOctetString, value, "Vals"))
}
seq.AppendChild(set)
return seq
}
type ModifyRequest struct {
dn string
addAttributes []PartialAttribute
deleteAttributes []PartialAttribute
replaceAttributes []PartialAttribute
}
func (m *ModifyRequest) Add(attrType string, attrVals []string) {
m.addAttributes = append(m.addAttributes, PartialAttribute{attrType: attrType, attrVals: attrVals})
}
func (m *ModifyRequest) Delete(attrType string, attrVals []string) {
m.deleteAttributes = append(m.deleteAttributes, PartialAttribute{attrType: attrType, attrVals: attrVals})
}
func (m *ModifyRequest) Replace(attrType string, attrVals []string) {
m.replaceAttributes = append(m.replaceAttributes, PartialAttribute{attrType: attrType, attrVals: attrVals})
}
func (m ModifyRequest) encode() *ber.Packet {
request := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationModifyRequest, nil, "Modify Request")
request.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimitive, ber.TagOctetString, m.dn, "DN"))
changes := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Changes")
for _, attribute := range m.addAttributes {
change := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Change")
change.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagEnumerated, uint64(AddAttribute), "Operation"))
change.AppendChild(attribute.encode())
changes.AppendChild(change)
}
for _, attribute := range m.deleteAttributes {
change := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Change")
change.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagEnumerated, uint64(DeleteAttribute), "Operation"))
change.AppendChild(attribute.encode())
changes.AppendChild(change)
}
for _, attribute := range m.replaceAttributes {
change := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Change")
change.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagEnumerated, uint64(ReplaceAttribute), "Operation"))
change.AppendChild(attribute.encode())
changes.AppendChild(change)
}
request.AppendChild(changes)
return request
}
func NewModifyRequest(
dn string,
) *ModifyRequest {
return &ModifyRequest{
dn: dn,
}
}
func (l *Conn) Modify(modifyRequest *ModifyRequest) error {
messageID := l.nextMessageID()
packet := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "LDAP Request")
packet.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, messageID, "MessageID"))
packet.AppendChild(modifyRequest.encode())
l.Debug.PrintPacket(packet)
channel, err := l.sendMessage(packet)
if err != nil {
return err
}
if channel == nil {
return NewError(ErrorNetwork, errors.New("ldap: could not send message"))
}
defer l.finishMessage(messageID)
l.Debug.Printf("%d: waiting for response", messageID)
packet = <-channel
l.Debug.Printf("%d: got response %p", messageID, packet)
if packet == nil {
return NewError(ErrorNetwork, errors.New("ldap: could not retrieve message"))
}
if l.Debug {
if err := addLDAPDescriptions(packet); err != nil {
return err
}
ber.PrintPacket(packet)
}
if packet.Children[1].Tag == ApplicationModifyResponse {
resultCode, resultDescription := getLDAPResultCode(packet)
if resultCode != 0 {
return NewError(resultCode, errors.New(resultDescription))
}
} else {
log.Printf("Unexpected Response: %d", packet.Children[1].Tag)
}
l.Debug.Printf("%d: returning", messageID)
return nil
}
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