package pac import ( "fmt" "gopkg.in/jcmturner/gokrb5.v5/mstypes" "gopkg.in/jcmturner/rpc.v0/ndr" ) // S4UDelegationInfo implements https://msdn.microsoft.com/en-us/library/cc237944.aspx type S4UDelegationInfo struct { S4U2proxyTarget mstypes.RPCUnicodeString // The name of the principal to whom the application can forward the ticket. TransitedListSize uint32 S4UTransitedServices []mstypes.RPCUnicodeString // List of all services that have been delegated through by this client and subsequent services or servers.. Size is value of TransitedListSize } // Unmarshal bytes into the S4UDelegationInfo struct func (k *S4UDelegationInfo) Unmarshal(b []byte) error { ch, _, p, err := ndr.ReadHeaders(&b) if err != nil { return fmt.Errorf("error parsing byte stream headers: %v", err) } e := &ch.Endianness //The next 4 bytes are an RPC unique pointer referent. We just skip these p += 4 k.S4U2proxyTarget, err = mstypes.ReadRPCUnicodeString(&b, &p, e) if err != nil { return err } k.TransitedListSize = ndr.ReadUint32(&b, &p, e) if k.TransitedListSize > 0 { ts := make([]mstypes.RPCUnicodeString, k.TransitedListSize, k.TransitedListSize) for i := range ts { ts[i], err = mstypes.ReadRPCUnicodeString(&b, &p, e) if err != nil { return err } } for i := range ts { ts[i].UnmarshalString(&b, &p, e) } k.S4UTransitedServices = ts } //Check that there is only zero padding left for _, v := range b[p:] { if v != 0 { return ndr.Malformed{EText: "non-zero padding left over at end of data stream"} } } return nil }