145 lines
4.7 KiB
Go
145 lines
4.7 KiB
Go
// This file contains the password modify extended operation as specified in rfc 3062
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//
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// https://tools.ietf.org/html/rfc3062
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//
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package ldap
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import (
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"errors"
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"fmt"
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"gopkg.in/asn1-ber.v1"
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)
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const (
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passwordModifyOID = "1.3.6.1.4.1.4203.1.11.1"
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)
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type PasswordModifyRequest struct {
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UserIdentity string
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OldPassword string
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NewPassword string
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}
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type PasswordModifyResult struct {
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GeneratedPassword string
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}
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func (r *PasswordModifyRequest) encode() (*ber.Packet, error) {
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request := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationExtendedRequest, nil, "Password Modify Extended Operation")
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request.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, passwordModifyOID, "Extended Request Name: Password Modify OID"))
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extendedRequestValue := ber.Encode(ber.ClassContext, ber.TypePrimitive, 1, nil, "Extended Request Value: Password Modify Request")
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passwordModifyRequestValue := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Password Modify Request")
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if r.UserIdentity != "" {
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passwordModifyRequestValue.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, r.UserIdentity, "User Identity"))
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}
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if r.OldPassword != "" {
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passwordModifyRequestValue.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 1, r.OldPassword, "Old Password"))
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}
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if r.NewPassword != "" {
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passwordModifyRequestValue.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 2, r.NewPassword, "New Password"))
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}
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extendedRequestValue.AppendChild(passwordModifyRequestValue)
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request.AppendChild(extendedRequestValue)
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return request, nil
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}
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// Create a new PasswordModifyRequest
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//
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// According to the RFC 3602:
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// userIdentity is a string representing the user associated with the request.
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// This string may or may not be an LDAPDN (RFC 2253).
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// If userIdentity is empty then the operation will act on the user associated
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// with the session.
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//
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// oldPassword is the current user's password, it can be empty or it can be
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// needed depending on the session user access rights (usually an administrator
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// can change a user's password without knowing the current one) and the
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// password policy (see pwdSafeModify password policy's attribute)
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//
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// newPassword is the desired user's password. If empty the server can return
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// an error or generate a new password that will be available in the
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// PasswordModifyResult.GeneratedPassword
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//
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func NewPasswordModifyRequest(userIdentity string, oldPassword string, newPassword string) *PasswordModifyRequest {
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return &PasswordModifyRequest{
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UserIdentity: userIdentity,
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OldPassword: oldPassword,
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NewPassword: newPassword,
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}
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}
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func (l *Conn) PasswordModify(passwordModifyRequest *PasswordModifyRequest) (*PasswordModifyResult, error) {
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messageID := l.nextMessageID()
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packet := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "LDAP Request")
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packet.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, messageID, "MessageID"))
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encodedPasswordModifyRequest, err := passwordModifyRequest.encode()
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if err != nil {
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return nil, err
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}
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packet.AppendChild(encodedPasswordModifyRequest)
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l.Debug.PrintPacket(packet)
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channel, err := l.sendMessage(packet)
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if err != nil {
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return nil, err
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}
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if channel == nil {
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return nil, NewError(ErrorNetwork, errors.New("ldap: could not send message"))
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}
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defer l.finishMessage(messageID)
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result := &PasswordModifyResult{}
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l.Debug.Printf("%d: waiting for response", messageID)
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packetResponse, ok := <-channel
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if !ok {
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return nil, NewError(ErrorNetwork, errors.New("ldap: channel closed"))
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}
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packet, err = packetResponse.ReadPacket()
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l.Debug.Printf("%d: got response %p", messageID, packet)
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if err != nil {
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return nil, err
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}
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if packet == nil {
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return nil, NewError(ErrorNetwork, errors.New("ldap: could not retrieve message"))
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}
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if l.Debug {
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if err := addLDAPDescriptions(packet); err != nil {
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return nil, err
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}
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ber.PrintPacket(packet)
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}
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if packet.Children[1].Tag == ApplicationExtendedResponse {
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resultCode, resultDescription := getLDAPResultCode(packet)
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if resultCode != 0 {
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return nil, NewError(resultCode, errors.New(resultDescription))
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}
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} else {
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return nil, NewError(ErrorUnexpectedResponse, fmt.Errorf("Unexpected Response: %d", packet.Children[1].Tag))
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}
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extendedResponse := packet.Children[1]
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for _, child := range extendedResponse.Children {
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if child.Tag == 11 {
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passwordModifyReponseValue := ber.DecodePacket(child.Data.Bytes())
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if len(passwordModifyReponseValue.Children) == 1 {
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if passwordModifyReponseValue.Children[0].Tag == 0 {
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result.GeneratedPassword = ber.DecodeString(passwordModifyReponseValue.Children[0].Data.Bytes())
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}
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}
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}
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}
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return result, nil
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}
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