Use mattermost v5 module (#1192)

vendor/github.com/mattermost/ldap/moddn.go

@@ -0,0 +1,85 @@
+// Package ldap - moddn.go contains ModifyDN functionality
+//
+// https://tools.ietf.org/html/rfc4511
+// ModifyDNRequest ::= [APPLICATION 12] SEQUENCE {
+//      entry           LDAPDN,
+//      newrdn          RelativeLDAPDN,
+//      deleteoldrdn    BOOLEAN,
+//      newSuperior     [0] LDAPDN OPTIONAL }
+//
+//
+package ldap
+
+import (
+	"log"
+
+	ber "github.com/go-asn1-ber/asn1-ber"
+)
+
+// ModifyDNRequest holds the request to modify a DN
+type ModifyDNRequest struct {
+	DN           string
+	NewRDN       string
+	DeleteOldRDN bool
+	NewSuperior  string
+}
+
+// NewModifyDNRequest creates a new request which can be passed to ModifyDN().
+//
+// To move an object in the tree, set the "newSup" to the new parent entry DN. Use an
+// empty string for just changing the object's RDN.
+//
+// For moving the object without renaming, the "rdn" must be the first
+// RDN of the given DN.
+//
+// A call like
+//   mdnReq := NewModifyDNRequest("uid=someone,dc=example,dc=org", "uid=newname", true, "")
+// will setup the request to just rename uid=someone,dc=example,dc=org to
+// uid=newname,dc=example,dc=org.
+func NewModifyDNRequest(dn string, rdn string, delOld bool, newSup string) *ModifyDNRequest {
+	return &ModifyDNRequest{
+		DN:           dn,
+		NewRDN:       rdn,
+		DeleteOldRDN: delOld,
+		NewSuperior:  newSup,
+	}
+}
+
+func (req *ModifyDNRequest) appendTo(envelope *ber.Packet) error {
+	pkt := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationModifyDNRequest, nil, "Modify DN Request")
+	pkt.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimitive, ber.TagOctetString, req.DN, "DN"))
+	pkt.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimitive, ber.TagOctetString, req.NewRDN, "New RDN"))
+	pkt.AppendChild(ber.NewBoolean(ber.ClassUniversal, ber.TypePrimitive, ber.TagBoolean, req.DeleteOldRDN, "Delete old RDN"))
+	if req.NewSuperior != "" {
+		pkt.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, req.NewSuperior, "New Superior"))
+	}
+
+	envelope.AppendChild(pkt)
+
+	return nil
+}
+
+// ModifyDN renames the given DN and optionally move to another base (when the "newSup" argument
+// to NewModifyDNRequest() is not "").
+func (l *Conn) ModifyDN(m *ModifyDNRequest) error {
+	msgCtx, err := l.doRequest(m)
+	if err != nil {
+		return err
+	}
+	defer l.finishMessage(msgCtx)
+
+	packet, err := l.readPacket(msgCtx)
+	if err != nil {
+		return err
+	}
+
+	if packet.Children[1].Tag == ApplicationModifyDNResponse {
+		err := GetLDAPError(packet)
+		if err != nil {
+			return err
+		}
+	} else {
+		log.Printf("Unexpected Response: %d", packet.Children[1].Tag)
+	}
+	return nil
+}