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92 lines
2.4 KiB
Go
Vendored
92 lines
2.4 KiB
Go
Vendored
package ldap
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// This file contains the "Who Am I?" extended operation as specified in rfc 4532
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//
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// https://tools.ietf.org/html/rfc4532
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import (
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"errors"
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"fmt"
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ber "github.com/go-asn1-ber/asn1-ber"
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)
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type whoAmIRequest bool
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// WhoAmIResult is returned by the WhoAmI() call
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type WhoAmIResult struct {
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AuthzID string
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}
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func (r whoAmIRequest) encode() (*ber.Packet, error) {
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request := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationExtendedRequest, nil, "Who Am I? Extended Operation")
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request.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, ControlTypeWhoAmI, "Extended Request Name: Who Am I? OID"))
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return request, nil
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}
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// WhoAmI returns the authzId the server thinks we are, you may pass controls
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// like a Proxied Authorization control
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func (l *Conn) WhoAmI(controls []Control) (*WhoAmIResult, error) {
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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, l.nextMessageID(), "MessageID"))
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req := whoAmIRequest(true)
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encodedWhoAmIRequest, err := req.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(encodedWhoAmIRequest)
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if len(controls) != 0 {
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packet.AppendChild(encodeControls(controls))
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}
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l.Debug.PrintPacket(packet)
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msgCtx, 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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defer l.finishMessage(msgCtx)
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result := &WhoAmIResult{}
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l.Debug.Printf("%d: waiting for response", msgCtx.id)
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packetResponse, ok := <-msgCtx.responses
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if !ok {
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return nil, NewError(ErrorNetwork, errors.New("ldap: response 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", msgCtx.id, 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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if err := GetLDAPError(packet); err != nil {
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return nil, err
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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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result.AuthzID = ber.DecodeString(child.Data.Bytes())
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}
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}
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return result, nil
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}
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