# SPDX-License-Identifier: GPL-2.0-or-later
# This file is part of Scapy
# See https://scapy.net/ for more information
# Copyright (C) Gabriel Potter

"""
[MS-DRSR] Directory Replication Service (DRS) Remote Protocol
"""

import uuid
from dataclasses import dataclass

from scapy.packet import Packet
from scapy.fields import LEIntField, FlagsField, UUIDField, UTCTimeField
from scapy.volatile import RandShort

from scapy.asn1.asn1 import ASN1_OID
from scapy.layers.msrpce.raw.ms_drsr import UUID
from scapy.layers.msrpce.raw.ms_drsr import *  # noqa: F403,F401

# [MS-DRSR] sect 5.16.4 ATTRTYP-to-OID Conversion


@dataclass
class Prefix:
    prefixString: str
    prefixIndex: int


def MakeAttid(t, o):
    """
    MakeAttid per [MS-DRSR] sect 5.16.4
    """
    ToBinary = lambda x: bytes(ASN1_OID(x))

    lastValue = int(o.split(".")[-1])

    # "convert the dotted form of OID into a BER encoded binary"
    binaryOID = ToBinary(o)

    # "get the prefix of the OID"
    if lastValue < 128:
        oidPrefix = binaryOID[:-1]
    else:
        oidPrefix = binaryOID[:-2]

    lowerWord = lastValue % 16384
    if lastValue >= 16384:
        lowerWord += 32768
    try:
        upperWord = next(x.prefixIndex for x in t if x.prefixString == oidPrefix)
    except StopIteration:
        # AddPrefixTableEntry
        upperWord = int(RandShort())
        t.append(
            Prefix(
                prefixString=oidPrefix,
                prefixIndex=upperWord,
            )
        )

    return upperWord * 65536 + lowerWord


# [MS-DRSR] sect 5.39 DRS_EXTENSIONS_INT


class DRS_EXTENSIONS_INT(Packet):
    fields_desc = [
        FlagsField(
            "dwFlags",
            0,
            -32,
            {
                0x00000001: "BASE",
                0x00000002: "ASYNCREPL",
                0x00000004: "REMOVEAPI",
                0x00000008: "MOVEREQ_V2",
                0x00000010: "GETCHG_DEFLATE",
                0x00000020: "DCINFO_V1",
                0x00000040: "RESTORE_USN_OPTIMIZATION",
                0x00000080: "ADDENTRY",
                0x00000100: "KCC_EXECUTE",
                0x00000200: "ADDENTRY_V2",
                0x00000400: "LINKED_VALUE_REPLICATION",
                0x00000800: "DCINFO_V2",
                0x00001000: "INSTANCE_TYPE_NOT_REQ_ON_MOD",
                0x00002000: "CRYPTO_BIND",
                0x00004000: "GET_REPL_INFO",
                0x00008000: "STRONG_ENCRYPTION",
                0x00010000: "DCINFO_VFFFFFFFF",
                0x00020000: "TRANSITIVE_MEMBERSHIP",
                0x00040000: "ADD_SID_HISTORY",
                0x00080000: "POST_BETA3",
                0x00100000: "GETCHGREQ_V5",
                0x00200000: "GETMEMBERSHIPS2",
                0x00400000: "GETCHGREQ_V6",
                0x00800000: "NONDOMAIN_NCS",
                0x01000000: "GETCHGREQ_V8",
                0x02000000: "GETCHGREPLY_V5",
                0x04000000: "GETCHGREPLY_V6",
                0x08000000: "WHISTLER_BETA3",
                0x10000000: "W2K3_DEFLATE",
                0x20000000: "GETCHGREQ_V10",
                0x40000000: "R2",
                0x80000000: "R3",
            },
        ),
        UUIDField("SiteObjGuid", None, uuid_fmt=UUIDField.FORMAT_LE),
        LEIntField("Pid", 0),
        UTCTimeField("dwReplEpoch", None, fmt="<I"),
        FlagsField(
            "dwFlagsExt",
            0,
            -32,
            {
                0x00000001: "ADAM",
                0x00000002: "LH_BETA2",
                0x00000004: "RECYCLE_BIN",
                0x00000100: "GETCHGREPLY_V9",
                0x00000400: "RPC_CORRELATIONID_1",
            },
        ),
        UUIDField("ConfigObjGuid", None, uuid_fmt=UUIDField.FORMAT_LE),
        LEIntField("dwExtCaps", 0),
    ]


# [MS-DRSR] sect 5.138 NTDSAPI_CLIENT_GUID

NTDSAPI_CLIENT_GUID = UUID(uuid.UUID("{e24d201a-4fd6-11d1-a3da-0000f875ae0d}").bytes_le)