#! /usr/bin/python3
# SPDX-License-Identifier: BSD-3-Clause
#
# Copyright (c) 2014, Dionach Ltd.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of Dionach Ltd nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# By BB
# based on MS-PST Microsoft specification for PST file format [MS-PST].pdf v2.1
#

import struct, datetime, math, os, sys, unicodedata, re, argparse, itertools, string, traceback
#import colorama
#import progressbar


class PSTException(Exception):
    pass


error_log_list = []

if sys.hexversion >= 0x03000000:
    def to_byte(x):
        return x

    def is_int(x):
        return isinstance(x, int)
else:
    to_byte = ord

    def is_int(x):
        return isinstance(x, (int, long))

##############################################################################################################################
#  _   _           _        ____        _        _                       ___   _ ____  ______    _
# | \ | | ___   __| | ___  |  _ \  __ _| |_ __ _| |__   __ _ ___  ___   / / \ | |  _ \| __ ) \  | |    __ _ _   _  ___ _ __
# |  \| |/ _ \ / _` |/ _ \ | | | |/ _` | __/ _` | '_ \ / _` / __|/ _ \ | ||  \| | | | |  _ \| | | |   / _` | | | |/ _ \ '__|
# | |\  | (_) | (_| |  __/ | |_| | (_| | || (_| | |_) | (_| \__ \  __/ | || |\  | |_| | |_) | | | |__| (_| | |_| |  __/ |
# |_| \_|\___/ \__,_|\___| |____/ \__,_|\__\__,_|_.__/ \__,_|___/\___| | ||_| \_|____/|____/| | |_____\__,_|\__, |\___|_|
#                                                                       \_\                /_/              |___/
##############################################################################################################################


class NID:

    NID_TYPE_HID = 0x00
    NID_TYPE_INTERNAL = 0x01
    NID_TYPE_NORMAL_FOLDER = 0x02
    NID_TYPE_SEARCH_FOLDER = 0x03
    NID_TYPE_NORMAL_MESSAGE = 0x04
    NID_TYPE_ATTACHMENT = 0x05
    NID_TYPE_SEARCH_UPDATE_QUEUE = 0x06
    NID_TYPE_SEARCH_CRITERIA_OBJECT = 0x07
    NID_TYPE_ASSOC_MESSAGE = 0x08
    NID_TYPE_CONTENTS_TABLE_INDEX = 0x0a
    NID_TYPE_RECEIVE_FOLDER_TABLE = 0x0b
    NID_TYPE_OUTGOING_QUEUE_TABLE = 0x0c
    NID_TYPE_HIERARCHY_TABLE = 0x0d
    NID_TYPE_CONTENTS_TABLE = 0x0e
    NID_TYPE_ASSOC_CONTENTS_TABLE = 0x0f
    NID_TYPE_SEARCH_CONTENTS_TABLE = 0x10
    NID_TYPE_ATTACHMENT_TABLE = 0x11
    NID_TYPE_RECIPIENT_TABLE = 0x12
    NID_TYPE_SEARCH_TABLE_INDEX = 0x13
    NID_TYPE_LTP = 0x1f

    NID_MESSAGE_STORE = 0x21
    NID_NAME_TO_ID_MAP = 0x61
    NID_NORMAL_FOLDER_TEMPLATE = 0xA1
    NID_SEARCH_FOLDER_TEMPLATE = 0xC1
    NID_ROOT_FOLDER = 0x122
    NID_SEARCH_MANAGEMENT_QUEUE = 0x1E1
    NID_SEARCH_ACTIVITY_LIST = 0x201
    NID_RESERVED1 = 0x241
    NID_SEARCH_DOMAIN_OBJECT = 0x261
    NID_SEARCH_GATHERER_QUEUE = 0x281
    NID_SEARCH_GATHERER_DESCRIPTOR = 0x2A1
    NID_RESERVED2 = 0x2E1
    NID_RESERVED3 = 0x301
    NID_SEARCH_GATHERER_FOLDER_QUEUE = 0x321

    def __init__(self, bytes_or_nid):

        if is_int(bytes_or_nid):
            self.nid = bytes_or_nid
        else:
            self.nid = struct.unpack('I', bytes_or_nid)[0]
        self.nidType = self.nid & 0x1f
        self.nidIndex = self.nid & 0xffffffe0
        self.is_hid = False
        self.is_nid = True

    def __repr__(self):

        return 'nid: %s, %s' % (hex(self.nid), hex(self.nidType))



class BID:

    def __init__(self, bytes):

        if len(bytes) == 4: # ansi
            self.bid = struct.unpack('I', bytes)[0]
        else: #unicode (8)
            self.bid = struct.unpack('Q', bytes)[0]
        if self.bid % 2 == 1: # A
            self.bid -= 1
        self.is_internal = (self.bid & 2 == 2) # B

    def __repr__(self):
        if self.is_internal:
            int_ext = 'I'
        else:
            int_ext = 'E'
        return 'bid: %s %s' % (self.bid, int_ext)



class BREF:

    def __init__(self, bytes):

        if len(bytes) == 8: # ansi
            self.bid, self.ib = struct.unpack('4sI', bytes)
        else: #unicode (16)
            self.bid, self.ib = struct.unpack('8sQ', bytes)
        self.bid = BID(self.bid)

    def __repr__(self):
        return '%s, ib: %s' % (self.bid, hex(self.ib))



class Page:

    PAGE_SIZE = 512
    ptypeBBT = 0x80
    ptypeNBT = 0x81
    ptypeFMap = 0x82
    ptypePMap = 0x83
    ptypeAMap = 0x84
    ptypeFPMap = 0x85
    ptypeDL = 0x86

    def __init__(self, bytes, is_ansi):

        # fixed 512 bytes
        if len(bytes) != Page.PAGE_SIZE:
            raise PSTException('Invalid Page size')
        if is_ansi:
            self.ptype, self.ptypeRepeat, self.wSig, self.bid, self.dwCRC = struct.unpack('BBHII', bytes[-12:])
        else: # unicode
            self.ptype, self.ptypeRepeat, self.wSig, self.dwCRC, self.bid = struct.unpack('BBHIQ', bytes[-16:])

        if self.ptype < Page.ptypeBBT or self.ptype > Page.ptypeDL:
            raise PSTException('Invalid Page Type %s ' % hex(self.ptype))
        if self.ptype != self.ptypeRepeat:
            raise PSTException('Page Type does not match Page Type Repeat %s!=%s ' % (hex(self.ptype), hex(self.ptypeRepeat)))

        if self.ptype in (Page.ptypeBBT, Page.ptypeNBT):
            if is_ansi:
                self.cEnt, self.cEntMax, self.cbEnt, self.cLevel = struct.unpack('BBBB', bytes[-16:-12])
                 # rgEntries 492 (cLevel>0) or 496 bytes (cLevel=0)
                entry_size = 12
            else: # unicode
                self.cEnt, self.cEntMax, self.cbEnt, self.cLevel = struct.unpack('BBBB', bytes[-24:-20])
                # rgEntries 488 bytes
                entry_size = 24
            if self.cLevel == 0:
                if self.ptype == Page.ptypeBBT:
                    entry_type = BBTENTRY
                else: # ptypeNBT
                    entry_type = NBTENTRY
                    entry_size = entry_size + entry_size//3
            else: # BTENTRY
                entry_type = BTENTRY

            self.rgEntries = []
            for i in range(self.cEnt): # self.cbEnt is size of each entry which may be different to entry_size
                self.rgEntries.append(entry_type(bytes[i*self.cbEnt:i*self.cbEnt+entry_size]))

    def __repr__(self):

        return 'PageType: %s, Entries: %s, Level: %s' % (hex(self.ptype), self.cEnt, self.cLevel)



class BTENTRY:

    def __init__(self, bytes):

        if len(bytes) == 12: # ansi
            self.btkey = struct.unpack('I',bytes[:4])[0]
            self.BREF = BREF(bytes[4:])
        else: # unicode 24
            self.btkey = struct.unpack('Q',bytes[:8])[0]
            self.BREF = BREF(bytes[8:])

    def __repr__(self):

        return '%s' % (self.BREF)



class BBTENTRY:

    def __init__(self, bytes):

        if len(bytes) == 12: #ansi
            self.BREF = BREF(bytes[:8])
            self.cb, self.cRef = struct.unpack('HH',bytes[8:12])
        else: # unicode (24)
            self.BREF = BREF(bytes[:16])
            self.cb, self.cRef = struct.unpack('HH',bytes[16:20])
        self.key = self.BREF.bid.bid

    def __repr__(self):

        return '%s, data size: %s' % (self.BREF, self.cb)



class NBTENTRY:

    def __init__(self, bytes):

        if len(bytes) == 16: #ansi
            self.nid, self.bidData, self.bidSub, self.nidParent = struct.unpack('4s4s4s4s',bytes)
        else: # unicode (32)
            self.nid, padding, self.bidData, self.bidSub, self.nidParent = struct.unpack('4s4s8s8s4s',bytes[:-4])
        self.nid = NID(self.nid)
        self.bidData = BID(self.bidData)
        self.bidSub = BID(self.bidSub)
        self.nidParent = NID(self.nidParent)
        self.key = self.nid.nid


    def __repr__(self):

        return '%s, bidData: %s, bidSub: %s' % (self.nid, self.bidData, self.bidSub)



class SLENTRY:

    def __init__(self, bytes):

        if len(bytes) == 12: #ansi
            self.nid, self.bidData, self.bidSub = struct.unpack('4s4s4s',bytes)
        else: # unicode 24
            self.nid, padding, self.bidData, self.bidSub = struct.unpack('4s4s8s8s',bytes)
        self.nid = NID(self.nid)
        self.bidData = BID(self.bidData)
        self.bidSub = BID(self.bidSub)


    def __repr__(self):

        return '%s %s sub%s' % (self.nid, self.bidData, self.bidSub)



class SIENTRY:

    def __init__(self, bytes):

        if len(bytes) == 8: #ansi
            self.nid, self.bid = struct.unpack('4s4s',bytes)
        else: # unicode 16
            self.nid, padding, self.bid = struct.unpack('4s4s8s',bytes)
        self.nid = NID(self.nid)
        self.bid = BID(self.bid)



class Block:

    # this has the first 512 entries removed, as decoding only uses from 512 onwards
    mpbbCryptFrom512 = (71, 241, 180, 230, 11, 106, 114, 72, 133, 78, 158, 235, 226, 248, 148, 83, 224, 187, 160, 2, 232, 90, 9, 171, 219, 227, 186, 198, 124, 195, 16, 221,
        57, 5, 150, 48, 245, 55, 96, 130, 140, 201, 19, 74, 107, 29, 243, 251, 143, 38, 151, 202, 145, 23, 1, 196, 50, 45, 110, 49, 149, 255, 217, 35,
        209, 0, 94, 121, 220, 68, 59, 26, 40, 197, 97, 87, 32, 144, 61, 131, 185, 67, 190, 103, 210, 70, 66, 118, 192, 109, 91, 126, 178, 15, 22, 41,
        60, 169, 3, 84, 13, 218, 93, 223, 246, 183, 199, 98, 205, 141, 6, 211, 105, 92, 134, 214, 20, 247, 165, 102, 117, 172, 177, 233, 69, 33, 112, 12,
        135, 159, 116, 164, 34, 76, 111, 191, 31, 86, 170, 46, 179, 120, 51, 80, 176, 163, 146, 188, 207, 25, 28, 167, 99, 203, 30, 77, 62, 75, 27, 155,
        79, 231, 240, 238, 173, 58, 181, 89, 4, 234, 64, 85, 37, 81, 229, 122, 137, 56, 104, 82, 123, 252, 39, 174, 215, 189, 250, 7, 244, 204, 142, 95,
        239, 53, 156, 132, 43, 21, 213, 119, 52, 73, 182, 18, 10, 127, 113, 136, 253, 157, 24, 65, 125, 147, 216, 88, 44, 206, 254, 36, 175, 222, 184, 54,
        200, 161, 128, 166, 153, 152, 168, 47, 14, 129, 101, 115, 228, 194, 162, 138, 212, 225, 17, 208, 8, 139, 42, 242, 237, 154, 100, 63, 193, 108, 249, 236)

    if sys.hexversion >= 0x03000000:
        decrypt_table = bytes.maketrans(bytearray(range(256)), bytearray(mpbbCryptFrom512))
    else:
        decrypt_table = string.maketrans(b''.join(map(chr, range(256))), b''.join(map(chr, mpbbCryptFrom512)))

    btypeData = 0
    btypeXBLOCK = 1
    btypeXXBLOCK = 2
    btypeSLBLOCK = 3
    btypeSIBLOCK = 4


    def __init__(self, bytes, offset, data_size, is_ansi, bid_check, bCryptMethod):

        self.is_ansi = is_ansi
        self.offset = offset # for debugging

        if self.is_ansi: # 12
            self.cb, self.wSig, self.bid, self.dwCRC = struct.unpack('HH4sI',bytes[-12:])
            bid_size = 4
            slentry_size = 12
            sientry_size = 8
            sl_si_entries_offset = 4 # [MS-PST] WRONG for SLBLOCK and SIBLOCK for ANSI: there is no 4 byte padding
        else: # unicode 16
            self.cb, self.wSig, self.dwCRC, self.bid = struct.unpack('HHI8s',bytes[-16:])
            bid_size = 8
            slentry_size = 24
            sientry_size = 16
            sl_si_entries_offset = 8
        self.bid = BID(self.bid)

        if self.bid.bid != bid_check.bid:
            raise PSTException('Block bid %s != ref bid %s' % (self.bid, bid_check))
        if data_size != self.cb:
            raise PSTException('BBT Entry data size %s != Block data size %s' % (data_size, self.cb) )

        if not self.bid.is_internal:

            self.block_type = Block.btypeData
            self.btype = 0
            self.cLevel = 0
            if bCryptMethod == 1: #NDB_CRYPT_PERMUTE
                self.data = bytes[:data_size].translate(Block.decrypt_table)
            else: # no data encoding
                self.data = bytes[:data_size] # data block

        else: # XBLOCK, XXBLOCK, SLBLOCK or SIBLOCK

            self.btype, self.cLevel, self.cEnt = struct.unpack('BBH',bytes[:4])

            if self.btype == 1: #XBLOCK, XXBLOCK
                self.lcbTotal = struct.unpack('I',bytes[4:8])[0]
                if self.cLevel == 1: #XBLOCK
                    self.block_type = Block.btypeXBLOCK
                elif self.cLevel == 2: #XXBLOCK
                    self.block_type = Block.btypeXXBLOCK
                else:
                    raise PSTException('Invalid Block Level %s' % self.cLevel)
                self.rgbid = []
                for i in range(self.cEnt):
                    self.rgbid.append(BID(bytes[8+i*bid_size:8+(i+1)*bid_size]))

            elif self.btype == 2: # SLBLOCK, SIBLOCK

                self.rgentries = []
                if self.cLevel == 0: #SLBLOCK
                    self.block_type = Block.btypeSLBLOCK
                    for i in range(self.cEnt):
                        self.rgentries.append(SLENTRY(bytes[sl_si_entries_offset + i*slentry_size:sl_si_entries_offset + (i+1)*slentry_size]))
                elif self.cLevel ==1: #SIBLOCK
                    self.block_type = Block.btypeSIBLOCK
                    for i in range(self.cEnt):
                        self.rgentries.append(SIENTRY(bytes[sl_si_entries_offset + i*sientry_size:sl_si_entries_offset + (i+1)*sientry_size]))
                else:
                    raise PSTException('Invalid Block Level %s' % self.cLevel)

            else:
                raise PSTException('Invalid Block Type %s' % self.btype)


    def __repr__(self):

        return 'Block %s %s %s' % (self.bid, self.btype, self.cLevel)



class NBD:
    """Node Database Layer"""

    def __init__(self, fd, header):

        self.fd = fd
        self.header = header
        self.nbt_entries = self.get_page_leaf_entries(NBTENTRY, self.header.root.BREFNBT.ib)
        self.bbt_entries = self.get_page_leaf_entries(BBTENTRY, self.header.root.BREFBBT.ib)


    def fetch_page(self, offset):

        self.fd.seek(offset)
        return Page(self.fd.read(Page.PAGE_SIZE), self.header.is_ansi)


    def fetch_block(self, bid):

        try:
            bbt_entry = self.bbt_entries[bid.bid]
        except KeyError:
            raise PSTException('Invalid BBTEntry: %s' % bid)
        offset = bbt_entry.BREF.ib
        data_size = bbt_entry.cb

        if self.header.is_ansi:
            block_trailer_size = 12
        else: # unicode
            block_trailer_size = 16
        # block size must align on 64 bytes
        size_diff = (data_size + block_trailer_size) % 64
        if size_diff == 0:
            block_size = data_size + block_trailer_size
        else:
            block_size = data_size + block_trailer_size + 64 - size_diff
        self.fd.seek(offset)
        return Block(self.fd.read(block_size), offset, data_size, self.header.is_ansi, bid, self.header.bCryptMethod)


    def fetch_all_block_data(self, bid):
        """returns list of block datas"""

        datas = []
        block = self.fetch_block(bid)
        if block.block_type == Block.btypeData:
            datas.append(block.data)
        elif block.block_type == Block.btypeXBLOCK:
            for xbid in block.rgbid:
                xblock = self.fetch_block(xbid)
                if xblock.block_type != Block.btypeData:
                    raise PSTException('Expecting data block, got block type %s' % xblock.block_type)
                datas.append(xblock.data)
        elif block.block_type == Block.btypeXXBLOCK:
            for xxbid in block.rgbid:
                xxblock = self.fetch_block(xxbid)
                if xxblock.block_type != Block.btypeXBLOCK:
                    raise PSTException('Expecting XBLOCK, got block type %s' % xxblock.block_type)
                datas.extend(self.fetch_all_block_data(xxbid))
        else:
            raise PSTException('Invalid block type (not data/XBLOCK/XXBLOCK), got %s' % block.block_type)
        return datas


    def fetch_subnodes(self, bid):
        """ get dictionary of subnode SLENTRYs for subnode bid"""

        subnodes = {}
        block = self.fetch_block(bid)
        if block.block_type == Block.btypeSLBLOCK:
            for slentry in block.rgentries:
                if slentry.nid in subnodes.keys():
                    raise PSTException('Duplicate subnode %s' % slentry.nid)
                subnodes[slentry.nid.nid] = slentry
        elif block.block_type == Block.btypeSIBLOCK:
            for sientry in block.rgentries:
                subnodes.update(self.fetch_subnodes(sientry.bid))
        else:
            raise PSTException('Invalid block type (not SLBLOCK/SIBLOCK), got %s' % block.block_type)
        return subnodes


    def get_page_leaf_entries(self, entry_type, page_offset):
        """ entry type is NBTENTRY or BBTENTRY"""

        leaf_entries = {}
        page = self.fetch_page(page_offset)
        for entry in page.rgEntries:
            if isinstance(entry, entry_type):
                if entry.key in leaf_entries.keys():
                    raise PSTException('Invalid Leaf Key %s' % entry)
                leaf_entries[entry.key] = entry
            elif isinstance(entry, BTENTRY):
                leaf_entries.update(self.get_page_leaf_entries(entry_type, entry.BREF.ib))
            else:
                raise PSTException('Invalid Entry Type')
        return leaf_entries



################################################################################################################################################################################
#  _     _     _           _____     _     _                               _   ____                            _   _              ___   _____ ______    _
# | |   (_)___| |_ ___    |_   _|_ _| |__ | | ___  ___      __ _ _ __   __| | |  _ \ _ __ ___  _ __   ___ _ __| |_(_) ___  ___   / / | |_   _|  _ \ \  | |    __ _ _   _  ___ _ __
# | |   | / __| __/ __|     | |/ _` | '_ \| |/ _ \/ __|    / _` | '_ \ / _` | | |_) | '__/ _ \| '_ \ / _ \ '__| __| |/ _ \/ __| | || |   | | | |_) | | | |   / _` | | | |/ _ \ '__|
# | |___| \__ \ |_\__ \_    | | (_| | |_) | |  __/\__ \_  | (_| | | | | (_| | |  __/| | | (_) | |_) |  __/ |  | |_| |  __/\__ \ | || |___| | |  __/| | | |__| (_| | |_| |  __/ |
# |_____|_|___/\__|___( )   |_|\__,_|_.__/|_|\___||___( )  \__,_|_| |_|\__,_| |_|   |_|  \___/| .__/ \___|_|   \__|_|\___||___/ | ||_____|_| |_|   | | |_____\__,_|\__, |\___|_|
#                     |/                              |/                                      |_|                                \_\              /_/              |___/
################################################################################################################################################################################


class HID:

    def __init__(self, bytes):

        # hidIndex cannot be zero, first 5 bits must be zero (hidType)
        self.hidIndex, self.hidBlockIndex = struct.unpack('HH', bytes)
        self.hidType = self.hidIndex & 0x1F
        self.hidIndex = (self.hidIndex >> 5) & 0x7FF
        self.is_hid = True
        self.is_nid = False



class HNPAGEMAP:

    def __init__(self, bytes):

        self.cAlloc, self.cFree = struct.unpack('HH', bytes[:4])
        self.rgibAlloc = []
        for i in range(self.cAlloc+1): # cAlloc+1 is next free
            self.rgibAlloc.append(struct.unpack('H', bytes[4+i*2:4+(i+1)*2])[0])



class HN:

    bTypeTC = 0x7C
    bTypeBTH = 0xB5
    bTypePC = 0xBC

    def __init__(self, nbt_entry, ltp, datas):
        """datas = list of data sections from blocks"""

        self.nbt_entry = nbt_entry
        self.datas = datas
        self.ltp = ltp
        self.hnpagemaps = []
        for i in range(len(datas)):
            bytes = datas[i]
            if i == 0: # HNHDR
                ibHnpm, self.bSig, self.bClientSig, self.hidUserRoot, self.rgbFillLevel = struct.unpack('HBB4sI', bytes[:12])
                self.hidUserRoot = HID(self.hidUserRoot)
                if self.bSig != 0xEC:
                    raise PSTException('Invalid HN Signature %s' % self.bSig)
            else: # HNPAGEHDR or HNBITMAPHDR
                ibHnpm = struct.unpack('H', bytes[:2])[0]
            self.hnpagemaps.append(HNPAGEMAP(bytes[ibHnpm:]))

        # subnode SLENTRYs
        self.subnodes = None
        if self.nbt_entry.bidSub.bid != 0:
            self.subnodes = self.ltp.nbd.fetch_subnodes(self.nbt_entry.bidSub)


    def get_hid_data(self, hid):

        start_offset = self.hnpagemaps[hid.hidBlockIndex].rgibAlloc[hid.hidIndex-1]
        end_offset = self.hnpagemaps[hid.hidBlockIndex].rgibAlloc[hid.hidIndex]
        return self.datas[hid.hidBlockIndex][start_offset:end_offset]


    def __repr__(self):

        return 'HN: %s, Blocks: %s' % (self.nbt_entry, len(self.datas))



class BTHData:

    def __init__(self, key, data):

        self.key = key
        self.data = data



class BTHIntermediate:

    def __init__(self, key, hidNextLevel, bIdxLevel):

        self.key = key
        self.hidNextLevel = hidNextLevel
        self.bIdxLevel = bIdxLevel



class BTH:

    def __init__(self, hn, bth_hid):
        """ hn = HN heapnode, bth_hid is hid of BTH header"""

        #BTHHEADER
        bth_header_bytes = hn.get_hid_data(bth_hid)
        self.bType, self.cbKey, self.cbEnt, self.bIdxLevels, self.hidRoot = struct.unpack('BBBB4s', bth_header_bytes)
        self.hidRoot = HID(self.hidRoot)
        if self.bType != HN.bTypeBTH:
            raise PSTException('Invalid BTH Type %s' % self.bType)
        self.bth_datas = []
        bth_working_stack = []
        if self.hidRoot != 0:
            bytes = hn.get_hid_data(self.hidRoot)
            bth_record_list = self.get_bth_records(bytes, self.bIdxLevels)
            if self.bIdxLevels == 0: # no intermediate levels
                self.bth_datas = bth_record_list
            else:
                bth_working_stack = bth_record_list
                while bth_working_stack:
                    bth_intermediate = bth_working_stack.pop()
                    bytes = hn.get_hid_data(bth_intermediate.hidNextLevel)
                    bth_record_list = self.get_bth_records(bytes, bth_intermediate.bIdxLevel - 1)
                    if bth_intermediate.bIdxLevel - 1 == 0: # leafs
                        self.bth_datas.extend(bth_record_list)
                    else:
                        bth_working_stack.extend(bth_record_list)


    def get_bth_records(self, bytes, bIdxLevel):

        bth_record_list = []
        if bIdxLevel == 0: # leaf
            record_size = self.cbKey + self.cbEnt
            records = len(bytes) // record_size
            for i in range(records):
                key, data = struct.unpack('%ss%ss' % (self.cbKey, self.cbEnt) , bytes[i*record_size:(i+1)*record_size])
                bth_record_list.append(BTHData(key, data))
        else: # intermediate
            record_size = self.cbKey + 4
            records = len(bytes) // record_size
            for i in range(records):
                key, hidNextLevel = struct.unpack('%ss4s' % self.cbKey , bytes[i*record_size:(i+1)*record_size])
                hidNextLevel = HID(hidNextLevel)
                bth_record_list.append(BTHIntermediate(key, hidNextLevel, bIdxLevel))
        return bth_record_list



class PCBTHData:

    def __init__(self, bth_data, hn):

        self.wPropId = struct.unpack('H', bth_data.key)[0]
        self.wPropType, self.dwValueHnid = struct.unpack('H4s', bth_data.data)
        ptype = hn.ltp.ptypes[self.wPropType]
        if not ptype.is_variable and not ptype.is_multi:
           if ptype.byte_count <= 4:
               self.value = ptype.value(self.dwValueHnid[:ptype.byte_count])
           else:
               self.hid = HID(self.dwValueHnid)
               self.value = ptype.value(hn.get_hid_data(self.hid))
        else:
            if NID(self.dwValueHnid).nidType == NID.NID_TYPE_HID:
                self.hid = HID(self.dwValueHnid)
                self.value = ptype.value(hn.get_hid_data(self.hid))
            else:
                self.subnode_nid = NID(self.dwValueHnid)
                if self.subnode_nid.nid in hn.subnodes.keys():
                    subnode_nid_bid = hn.subnodes[self.subnode_nid.nid].bidData
                else:
                    raise PSTException('Invalid NID subnode reference %s' % self.subnode_nid)
                datas = hn.ltp.nbd.fetch_all_block_data(subnode_nid_bid)
                self.value = ptype.value(b''.join(datas))

    def __repr__(self):

        return '%s (%s) = %s' % (hex(self.wPropId), hex(self.wPropType), repr(self.value))



class PTypeEnum:

    PtypInteger16 = 0x02
    PtypInteger32 = 0x03
    PtypFloating32 = 0x04
    PtypFloating64 = 0x05
    PtypCurrency = 0x06
    PtypFloatingTime = 0x07
    PtypErrorCode = 0x0A
    PtypBoolean = 0x0B
    PtypInteger64 = 0x14
    PtypString = 0x1F
    PtypString8 = 0x1E
    PtypTime = 0x40
    PtypGuid = 0x48
    PtypServerId = 0xFB
    PtypRestriction = 0xFD
    PtypRuleAction = 0xFE
    PtypBinary = 0x102
    PtypMultipleInteger16 = 0x1002
    PtypMultipleInteger32 = 0x1003
    PtypMultipleFloating32 = 0x1004
    PtypMultipleFloating64 = 0x1005
    PtypMultipleCurrency = 0x1006
    PtypMultipleFloatingTime = 0x1007
    PtypMultipleInteger64 = 0x1014
    PtypMultipleString = 0x101F
    PtypMultipleString8 = 0x101E
    PtypMultipleTime = 0x1040
    PtypMultipleGuid = 0x1048
    PtypMultipleBinary = 0x1102
    PtypUnspecified = 0x0
    PtypNull = 0x01
    PtypObject = 0x0D



class PType:

    def __init__(self, ptype, byte_count, is_variable, is_multi):

        self.ptype, self.byte_count, self.is_variable, self.is_multi = ptype, byte_count, is_variable, is_multi

    def value(self, bytes):

        if self.ptype ==  PTypeEnum.PtypInteger16:
            return struct.unpack('h', bytes)[0]
        elif self.ptype == PTypeEnum.PtypInteger32:
            return struct.unpack('i', bytes)[0]
        elif self.ptype == PTypeEnum.PtypFloating32:
            return struct.unpack('f', bytes)[0]
        elif self.ptype == PTypeEnum.PtypFloating64:
            return struct.unpack('d', bytes)[0]
        elif self.ptype == PTypeEnum.PtypCurrency:
            return None
#            raise PSTException('PtypCurrency value not implemented')
        elif self.ptype == PTypeEnum.PtypFloatingTime:
            return self.get_floating_time(bytes)
        elif self.ptype == PTypeEnum.PtypErrorCode:
            return struct.unpack('I', bytes)[0]
        elif self.ptype == PTypeEnum.PtypBoolean:
            return (struct.unpack('B', bytes)[0] != 0)
        elif self.ptype == PTypeEnum.PtypInteger64:
            return struct.unpack('q', bytes)[0]
        elif self.ptype == PTypeEnum.PtypString:
            try:
                return bytes.decode('utf-16-le') # unicode
            except UnicodeDecodeError:
                log_error(PSTException('String property not correctly utf-16-le encoded, ignoring errors'))
                return bytes.decode('utf-16-le', errors='ignore') # unicode
        elif self.ptype == PTypeEnum.PtypString8:
            return bytes
        elif self.ptype == PTypeEnum.PtypTime:
            return self.get_time(bytes)
        elif self.ptype == PTypeEnum.PtypGuid:
            return bytes
        elif self.ptype == PTypeEnum.PtypServerId:
            return None
#            raise PSTException('PtypServerId value not implemented')
        elif self.ptype == PTypeEnum.PtypRestriction:
            return None
#            raise PSTException('PtypRestriction value not implemented')
        elif self.ptype == PTypeEnum.PtypRuleAction:
            return None
#            raise PSTException('PtypRuleAction value not implemented')
        elif self.ptype == PTypeEnum.PtypBinary:
            #count = struct.unpack('H', bytes[:2])[0]
            return bytes
        elif self.ptype == PTypeEnum.PtypMultipleInteger16:
            count = len(bytes) // 2
            return [struct.unpack('h', bytes[i*2:(i+1)*2])[0] for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleInteger32:
            count = len(bytes) // 4
            return [struct.unpack('i', bytes[i*4:(i+1)*4])[0] for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleFloating32:
            count = len(bytes) // 4
            return [struct.unpack('f', bytes[i*4:(i+1)*4])[0] for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleFloating64:
            ccount = len(bytes) // 8
            return [struct.unpack('d', bytes[i*8:(i+1)*8])[0] for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleCurrency:
            return None
#            raise PSTException('PtypMultipleCurrency value not implemented')
        elif self.ptype == PTypeEnum.PtypMultipleFloatingTime:
            count = len(bytes) // 8
            return [self.get_floating_time(bytes[i*8:(i+1)*8]) for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleInteger64:
            count = len(bytes) // 8
            return [struct.unpack('q', bytes[i*8:(i+1)*8])[0] for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleString:
            ulCount, rgulDataOffsets = self.get_multi_value_offsets(bytes)
            s = []
            for i in range(ulCount):
                s.append(bytes[rgulDataOffsets[i]:rgulDataOffsets[i+1]].decode('utf-16-le'))
            return s
        elif self.ptype == PTypeEnum.PtypMultipleString8:
            ulCount, rgulDataOffsets = self.get_multi_value_offsets(bytes)
            datas = []
            for i in range(ulCount):
                datas.append(bytes[rgulDataOffsets[i]:rgulDataOffsets[i+1]])
            return datas
        elif self.ptype == PTypeEnum.PtypMultipleTime:
            count = len(bytes) // 8
            return [self.get_time(bytes[i*8:(i+1)*8]) for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleGuid:
            count = len(bytes) // 16
            return [bytes[i*16:(i+1)*16] for i in range(count)]
        elif self.ptype == PTypeEnum.PtypMultipleBinary:
            ulCount, rgulDataOffsets = self.get_multi_value_offsets(bytes)
            datas = []
            for i in range(ulCount):
                datas.append(bytes[rgulDataOffsets[i]:rgulDataOffsets[i+1]])
            return datas
        elif self.ptype == PTypeEnum.PtypUnspecified:
            return bytes
        elif self.ptype == PTypeEnum.PtypNull:
            return None
        elif self.ptype == PTypeEnum.PtypObject:
            return bytes[:4]
        else:
            raise PSTException('Invalid PTypeEnum for value %s ' % self.ptype)


    def get_floating_time(self, bytes):

        return struct.unpack('d', bytes)[0]


    def get_time(self, bytes):

        return struct.unpack('q', bytes)[0]


    def get_multi_value_offsets(self, bytes):

        ulCount = struct.unpack('I', bytes[:4])[0]
        rgulDataOffsets = [struct.unpack('I', bytes[(i+1)*4:(i+2)*4])[0] for i in range(ulCount)]
        rgulDataOffsets.append(len(bytes))
        return ulCount, rgulDataOffsets



class PropIdEnum:

    PidTagNameidBucketCount = 0x0001
    PidTagNameidStreamGuid = 0x0002
    PidTagNameidStreamEntry = 0x0003
    PidTagNameidStreamString = 0x0004
    PidTagNameidBucketBase = 0x1000
    PidTagItemTemporaryFlags = 0x1097
    PidTagPstBestBodyProptag = 0x661D
    PidTagPstIpmsubTreeDescendant = 0x6705
    PidTagPstSubTreeContainer = 0x6772
    PidTagLtpParentNid = 0x67F1
    PidTagLtpRowId = 0x67F2
    PidTagLtpRowVer = 0x67F3
    PidTagPstPassword = 0x67FF
    PidTagMapiFormComposeCommand = 0x682F
    PidTagRecordKey = 0x0FF9
    PidTagDisplayName = 0x3001
    PidTagIpmSubTreeEntryId = 0x35E0
    PidTagIpmWastebasketEntryId = 0x35E3
    PidTagFinderEntryId = 0x35E7
    PidTagContentCount = 0x3602
    PidTagContentUnreadCount = 0x3603
    PidTagSubfolders = 0x360A
    PidTagReplItemid = 0x0E30
    PidTagReplChangenum = 0x0E33
    PidTagReplVersionHistory = 0x0E34
    PidTagReplFlags = 0x0E38
    PidTagContainerClass = 0x3613
    PidTagPstHiddenCount = 0x6635
    PidTagPstHiddenUnread = 0x6636
    PidTagImportance = 0x0017
    PidTagMessageClassW = 0x001A
    PidTagSensitivity = 0x0036
    PidTagSubjectW = 0x0037
    PidTagClientSubmitTime = 0x0039
    PidTagSentRepresentingSearchKey = 0x003B
    PidTagSentRepresentingNameW = 0x0042
    PidTagMessageToMe = 0x0057
    PidTagMessageCcMe = 0x0058
    PidTagConversationTopicW = 0x0070
    PidTagConversationIndex = 0x0071
    PidTagDisplayCcW = 0x0E03
    PidTagDisplayToW = 0x0E04
    PidTagMessageDeliveryTime = 0x0E06
    PidTagMessageFlags = 0x0E07
    PidTagMessageSize = 0x0E08
    PidTagMessageStatus = 0x0E17
    PidTagReplCopiedfromVersionhistory = 0x0E3C
    PidTagReplCopiedfromItemid = 0x0E3D
    PidTagLastModificationTime = 0x3008
    PidTagSmtpAddress = 0x39FE
    PidTagSecureSubmitFlags = 0x65C6
    PidTagOfflineAddressBookName = 0x6800
    PidTagSendOutlookRecallReport = 0x6803
    PidTagOfflineAddressBookTruncatedProperties = 0x6805
    PidTagMapiFormComposeCommand = 0x682F
    PidTagViewDescriptorFlags = 0x7003
    PidTagViewDescriptorLinkTo = 0x7004
    PidTagViewDescriptorViewFolder = 0x7005
    PidTagViewDescriptorName = 0x7006
    PidTagViewDescriptorVersion = 0x7007
    PidTagCreationTime = 0x3007
    PidTagSearchKey = 0x300B
    PidTagRecipientType = 0x0c15
    PidTagResponsibility = 0x0E0F
    PidTagObjectType = 0x0FFE
    PidTagEntryID = 0x0FFF
    PidTagAddressType = 0x3002
    PidTagEmailAddress = 0x3003
    PidTagDisplayType = 0x3900
    PidTag7BitDisplayName = 0x39FF
    PidTagSendRichInfo = 0x3A40
    PidTagAttachmentSize = 0x0E20
    PidTagAttachFilename = 0x3704
    PidTagAttachMethod = 0x3705
    PidTagRenderingPosition = 0x370B
    PidTagSenderEntryId = 0x0C19
    PidTagSenderName = 0x0C1A
    PidTagSenderSearchKey = 0x0C1D
    PidTagSenderAddressType = 0x0C1E
    PidTagRead = 0x0E69
    PidTagHasAttachments = 0x0E1B
    PidTagBody = 0x1000
    PidTagRtfCompressed = 0x1009
    PidTagAttachDataBinary = 0x3701
    PidTagAttachDataObject = 0x3701
    PidTagOriginalDisplayTo = 0x0074
    PidTagTransportMessageHeaders = 0x007D
    PidTagSenderSmtpAddress = 0x5D01
    PidTagSentRepresentingSmtpAddress = 0x5D02
    PidTagReceivedBySmtpAddress = 0x5D07
    PidTagReceivedRepresentingSmtpAddress = 0x5D08
    PidTagAttachMimeTag = 0x370E
    PidTagAttachExtension = 0x3703
    PidTagAttachLongFilename = 0x3707



class PC: # Property Context

    def __init__(self, hn):

        self.hn = hn
        if hn.bClientSig != HN.bTypePC:
            raise PSTException('Invalid HN bClientSig, not bTypePC, is %s' % hn.bClientSig)
        self.bth = BTH(hn, hn.hidUserRoot)
        if self.bth.cbKey != 2:
            raise PSTException('Invalid PC BTH key size: %s' % self.bth.cbKey)
        if self.bth.cbEnt != 6:
            raise PSTException('Invalid PC BTH data size: %s' % self.bth.cbEnt)
        self.props = {}
        for bth_data in self.bth.bth_datas:
            pc_prop = PCBTHData(bth_data, hn)
            if pc_prop.wPropId in (PropIdEnum.PidTagFinderEntryId, PropIdEnum.PidTagIpmSubTreeEntryId, PropIdEnum.PidTagIpmWastebasketEntryId, PropIdEnum.PidTagEntryID):
                pc_prop.value = EntryID(pc_prop.value)
            self.props[pc_prop.wPropId] = pc_prop


    def getval(self, propid):

        if propid in self.props.keys():
            return self.props[propid].value
        else:
            return None


    def __repr__(self):

        s = 'PC %s\n' % self.hn
        s += '\n'.join(['Property %s' % self.props[wPropId] for wPropId in sorted(self.props.keys())])
        return s



class TCOLDESC:

    def __init__(self, bytes):

        #self.tag is 4 byte (self.wPropId, self.wPropType): where is documentation MS?
        self.wPropType, self.wPropId, self.ibData, self.cbData, self.iBit = struct.unpack('HHHBB', bytes)

    def __repr__(self):

        return 'Tag: %s/%s, Offset+Size: %s+%s' % (hex(self.wPropId), hex(self.wPropType), self.ibData, self.cbData)



class TCROWID:

    def __init__(self, bth_data):

        self.dwRowID = struct.unpack('I', bth_data.key)[0] # dwRowID
        self.nid = NID(bth_data.key) # for hierarchy TCs
        if len(bth_data.data) == 2: # ansi
            self.dwRowIndex = struct.unpack('H', bth_data.data)[0]
        else: # unicode (4)
            self.dwRowIndex = struct.unpack('I', bth_data.data)[0]



class TC: # Table Context

    TCI_4b = 0
    TCI_2b = 1
    TCI_1b = 2
    TCI_bm = 3

    def __init__(self, hn):

        self.hn = hn
        if hn.bClientSig != HN.bTypeTC:
            raise PSTException('Invalid HN bClientSig, not bTypeTC, is %s' % hn.bClientSig)
        tcinfo_bytes = hn.get_hid_data(hn.hidUserRoot)
        self.bType, self.cCols = struct.unpack('BB', tcinfo_bytes[:2])
        if self.bType != HN.bTypeTC:
            raise PSTException('Invalid TCINFO bType, not bTypeTC, is %s' % self.bType)
        self.rgib = struct.unpack('HHHH', tcinfo_bytes[2:10])
        self.hidRowIndex, self.hnidRows, self.hidIndex = struct.unpack('4s4s4s', tcinfo_bytes[10:22])
        self.hidRowIndex = HID(self.hidRowIndex)
        if NID(self.hnidRows).nidType == NID.NID_TYPE_HID:
            self.hnidRows = HID(self.hnidRows)
        else:
            self.hnidRows = NID(self.hnidRows)
        self.rgTCOLDESC = []
        for i in range(self.cCols):
            self.rgTCOLDESC.append(TCOLDESC(tcinfo_bytes[22+i*8:22+(i+1)*8]))

        self.setup_row_index()
        self.setup_row_matrix()


    def setup_row_index(self):

        self.RowIndex = {} # key is dwRowID, value is dwRowIndex
        if not (self.hnidRows.is_hid and self.hnidRows.hidIndex == 0):
            row_index_bth = BTH(self.hn, self.hidRowIndex)
            if row_index_bth.cbKey != 4:
                raise PSTException('Invalid TC RowIndex key size %s' % row_index_bth.cbKey)
            for bth_data in row_index_bth.bth_datas:
                tcrowid = TCROWID(bth_data)
                self.RowIndex[tcrowid.dwRowIndex] = tcrowid


    def setup_row_matrix(self):

        self.RowMatrix = {}
        if self.RowIndex:
            if self.hn.ltp.nbd.header.is_ansi:
                size_BlockTrailer = 12
            else: # unicode
                size_BlockTrailer = 16
            row_size = self.rgib[TC.TCI_bm]
            RowsPerBlock = int(math.floor((8192.0 - size_BlockTrailer) / row_size))
            if self.hnidRows.is_hid:
                row_matrix_datas = [self.hn.get_hid_data(self.hnidRows)] # block data list
            else:
                if self.hnidRows.nid in self.hn.subnodes.keys():
                    subnode_nid_bid = self.hn.subnodes[self.hnidRows.nid].bidData
                else:
                    raise PSTException('Row Matrix HNID not in Subnodes: %s' % self.hnidRows.nid)
                row_matrix_datas = self.hn.ltp.nbd.fetch_all_block_data(subnode_nid_bid)

            for irow in range(len(self.RowIndex)):
                BlockIndex = irow // RowsPerBlock
                RowIndex = irow % RowsPerBlock
                row_bytes = row_matrix_datas[BlockIndex][RowIndex * row_size:(RowIndex+1) * row_size]
                dwRowID = struct.unpack('I', row_bytes[:4])[0]
                rgbCEB = row_bytes[self.rgib[TC.TCI_1b]:]
                #row_datas = []
                rowvals = {}
                for tcoldesc in self.rgTCOLDESC:
                    is_fCEB = ((to_byte(rgbCEB[tcoldesc.iBit // 8]) & (1 << (7 - (tcoldesc.iBit % 8)))) != 0)
                    if is_fCEB:
                        data_bytes = row_bytes[tcoldesc.ibData:tcoldesc.ibData+tcoldesc.cbData]
                    else:
                        data_bytes = None
                    #row_datas.append(self.get_row_cell_value(data_bytes, tcoldesc))
                    if tcoldesc.wPropId in rowvals.keys():
                        raise PSTException('Property ID %s already in row data' % hex(tcoldesc.wPropId))
                    rowvals[tcoldesc.wPropId] = self.get_row_cell_value(data_bytes, tcoldesc)
                self.RowMatrix[dwRowID] = rowvals #row_datas


    def get_row_cell_value(self, data_bytes, tcoldesc):

        if data_bytes is None:
            return None
        else:
            ptype = self.hn.ltp.ptypes[tcoldesc.wPropType]

            if not ptype.is_variable and not ptype.is_multi:
               if ptype.byte_count <= 8:
                   return ptype.value(data_bytes)
               else:
                   hid = HID(data_bytes)
                   return ptype.value(self.hn.get_hid_data(hid))
            else:
                if NID(data_bytes).nidType == NID.NID_TYPE_HID:
                    hid = HID(data_bytes)
                    return ptype.value(self.hn.get_hid_data(hid))
                else:
                    subnode_nid = NID(data_bytes)
                    if subnode_nid.nid in self.hn.subnodes.keys():
                        subnode_nid_bid = self.hn.subnodes[subnode_nid.nid].bidData
                    else:
                        raise PSTException('Row Matrix Value HNID Subnode invalid: %s' % subnode_nid)
                    datas = self.hn.ltp.nbd.fetch_all_block_data(subnode_nid_bid)
                    return ptype.value(b''.join(datas))


    def get_row_ID(self, RowIndex):

        return self.RowIndex[RowIndex].dwRowID


    def getval(self, RowIndex, wPropId):

        dwRowID = self.get_row_ID(RowIndex)
        rowvals = self.RowMatrix[dwRowID]
        if wPropId in rowvals.keys():
            return rowvals[wPropId]
        else:
            return None


    def __repr__(self):

        s = 'TC Rows: %s, %s\n' % (len(self.RowIndex), self.hn)
        s += 'Columns: ' + ''.join([' %s' % tcoldesc for tcoldesc in self.rgTCOLDESC])
        s += '\nData:\n' + '\n'.join(['%s: %s' % (hex(dwRowID), rowvals) for dwRowID,rowvals in self.RowMatrix.items()])
        return s



class LTP:
    """LTP layer"""

    def __init__(self, nbd):

        self.nbd = nbd

        self.ptypes = {
            PTypeEnum.PtypInteger16:PType(PTypeEnum.PtypInteger16, 2, False, False),
            PTypeEnum.PtypInteger32:PType(PTypeEnum.PtypInteger32, 4, False, False),
            PTypeEnum.PtypFloating32:PType(PTypeEnum.PtypFloating32, 4, False, False),
            PTypeEnum.PtypFloating64:PType(PTypeEnum.PtypFloating64, 8, False, False),
            PTypeEnum.PtypCurrency:PType(PTypeEnum.PtypCurrency, 8, False, False),
            PTypeEnum.PtypFloatingTime:PType(PTypeEnum.PtypFloatingTime, 8, False, False),
            PTypeEnum.PtypErrorCode:PType(PTypeEnum.PtypErrorCode, 4, False, False),
            PTypeEnum.PtypBoolean:PType(PTypeEnum.PtypBoolean, 1, False, False),
            PTypeEnum.PtypInteger64:PType(PTypeEnum.PtypInteger64, 8, False, False),
            PTypeEnum.PtypString:PType(PTypeEnum.PtypString, 0, True, False),
            PTypeEnum.PtypString8:PType(PTypeEnum.PtypString8, 0, True, False),
            PTypeEnum.PtypTime:PType(PTypeEnum.PtypTime, 8, False, False),
            PTypeEnum.PtypGuid:PType(PTypeEnum.PtypGuid, 16, False, False),
            PTypeEnum.PtypServerId:PType(PTypeEnum.PtypServerId, 2, False, True),
            PTypeEnum.PtypRestriction:PType(PTypeEnum.PtypRestriction, 0, True, False),
            PTypeEnum.PtypRuleAction:PType(PTypeEnum.PtypRuleAction, 2, False, True),
            PTypeEnum.PtypBinary:PType(PTypeEnum.PtypBinary, 2, False, True),
            PTypeEnum.PtypMultipleInteger16:PType(PTypeEnum.PtypMultipleInteger16, 2, False, True),
            PTypeEnum.PtypMultipleInteger32:PType(PTypeEnum.PtypMultipleInteger32, 2, False, True),
            PTypeEnum.PtypMultipleFloating32:PType(PTypeEnum.PtypMultipleFloating32, 2, False, True),
            PTypeEnum.PtypMultipleFloating64:PType(PTypeEnum.PtypMultipleFloating64, 2, False, True),
            PTypeEnum.PtypMultipleCurrency:PType(PTypeEnum.PtypMultipleCurrency, 2, False, True),
            PTypeEnum.PtypMultipleFloatingTime:PType(PTypeEnum.PtypMultipleFloatingTime, 2, False, True),
            PTypeEnum.PtypMultipleInteger64:PType(PTypeEnum.PtypMultipleInteger64, 2, False, True),
            PTypeEnum.PtypMultipleString:PType(PTypeEnum.PtypMultipleString, 2, True, True),
            PTypeEnum.PtypMultipleString8:PType(PTypeEnum.PtypMultipleString8, 2, True, True),
            PTypeEnum.PtypMultipleTime:PType(PTypeEnum.PtypMultipleTime, 2, False, True),
            PTypeEnum.PtypMultipleGuid:PType(PTypeEnum.PtypMultipleGuid, 2, False, True),
            PTypeEnum.PtypMultipleBinary:PType(PTypeEnum.PtypMultipleBinary, 2, False, True),
            PTypeEnum.PtypUnspecified:PType(PTypeEnum.PtypUnspecified, 0, False, False),
            PTypeEnum.PtypNull:PType(PTypeEnum.PtypNull, 0, False, False),
            PTypeEnum.PtypObject:PType(PTypeEnum.PtypObject, 4, False, True)
        }


    def get_pc_by_nid(self, nid):

        nbt_entry = self.nbd.nbt_entries[nid.nid]
        datas = self.nbd.fetch_all_block_data(nbt_entry.bidData)
        hn = HN(nbt_entry, self, datas)
        return PC(hn)


    def get_pc_by_slentry(self, slentry):

        datas = self.nbd.fetch_all_block_data(slentry.bidData)
        hn = HN(slentry, self, datas)
        return PC(hn)


    def get_tc_by_nid(self, nid):

        nbt_entry = self.nbd.nbt_entries[nid.nid]
        datas = self.nbd.fetch_all_block_data(nbt_entry.bidData)
        hn = HN(nbt_entry, self, datas)
        return TC(hn)


    def get_tc_by_slentry(self, slentry):

        datas = self.nbd.fetch_all_block_data(slentry.bidData)
        hn = HN(slentry, self, datas)
        return TC(hn)


    def strip_SubjectPrefix(self, Subject):

        if Subject and ord(Subject[:1]) == 0x01:
            #prefix_length = ord(Subject[1:2])
            #return Subject[prefix_length+1:]
            return Subject[2:]
        else:
            return Subject



#############################################################################################################################
#  __  __                           _               _
# |  \/  | ___  ___ ___  __ _  __ _(_)_ __   __ _  | |    __ _ _   _  ___ _ __
# | |\/| |/ _ \/ __/ __|/ _` |/ _` | | '_ \ / _` | | |   / _` | | | |/ _ \ '__|
# | |  | |  __/\__ \__ \ (_| | (_| | | | | | (_| | | |__| (_| | |_| |  __/ |
# |_|  |_|\___||___/___/\__,_|\__, |_|_| |_|\__, | |_____\__,_|\__, |\___|_|
#                             |___/         |___/              |___/
#############################################################################################################################


class EntryID:

    def __init__(self, bytes):

        self.rgbFlags, self.uid, self.nid = struct.unpack('4s16s4s', bytes)
        self.nid = NID(self.nid)

    def __repr__(self):

        return 'EntryID %s' % self.nid



class SubFolder:

    def __init__(self, nid, name, parent_path):

        self.nid = nid
        self.name = name
        self.parent_path = parent_path

    def __repr__(self):

        return '%s (%s)' % (self.name, self.nid)



class SubMessage:

    def __init__(self, nid, SentRepresentingName, Subject, ClientSubmitTime):

        self.nid = nid
        self.SentRepresentingName = SentRepresentingName
        self.Subject = Subject
        self.ClientSubmitTime = ClientSubmitTime

    def __repr__(self):

        return '%s (%s)' % (self.Subject, self.nid)



class Folder:

    def __init__(self, nid, ltp, parent_path='', messaging=None):

        if nid.nidType != NID.NID_TYPE_NORMAL_FOLDER:
            raise PSTException('Invalid Folder NID Type: %s' % nid.nidType)
        self.pc = ltp.get_pc_by_nid(nid)
        self.DisplayName = self.pc.getval(PropIdEnum.PidTagDisplayName)
        self.path = parent_path+'/'+self.DisplayName.replace('/', '\\/')

        #print('FOLDER DEBUG', self.DisplayName, self.pc)

        # entryids in PST are stored as nids
        self.nid = nid
        if messaging:
            self.EntryId = 4*b'\x00' + messaging.store_record_key + struct.pack('I', nid.nid)

        self.ContentCount = self.pc.getval(PropIdEnum.PidTagContentCount)
        self.ContainerClass = self.pc.getval(PropIdEnum.PidTagContainerClass)
        self.HasSubfolders = self.pc.getval(PropIdEnum.PidTagSubfolders)

        nid_hierachy = NID(nid.nidIndex | NID.NID_TYPE_HIERARCHY_TABLE)
        nid_contents = NID(nid.nidIndex | NID.NID_TYPE_CONTENTS_TABLE)
        nid_fai = NID(nid.nidIndex | NID.NID_TYPE_ASSOC_CONTENTS_TABLE) # FAI = Folder Associated Information

        try:
            self.tc_hierachy = None
            self.subfolders = []
            self.tc_hierachy = ltp.get_tc_by_nid(nid_hierachy)
            self.subfolders = [SubFolder(self.tc_hierachy.RowIndex[RowIndex].nid, self.tc_hierachy.getval(RowIndex,PropIdEnum.PidTagDisplayName), self.path) for RowIndex in range(len(self.tc_hierachy.RowIndex))]
        except PSTException as e:
            log_error(e)

        try:
            self.tc_contents = None
            self.submessages = []
            self.tc_contents = ltp.get_tc_by_nid(nid_contents)
            self.submessages = [SubMessage(self.tc_contents.RowIndex[RowIndex].nid, \
                    self.tc_contents.getval(RowIndex,PropIdEnum.PidTagSentRepresentingNameW), ltp.strip_SubjectPrefix(self.tc_contents.getval(RowIndex,PropIdEnum.PidTagSubjectW)), \
                    self.tc_contents.getval(RowIndex,PropIdEnum.PidTagClientSubmitTime)) \
                    for RowIndex in range(len(self.tc_contents.RowIndex)) if RowIndex in self.tc_contents.RowIndex.keys()]
        except PSTException as e:
            log_error(e)

        try:
            self.tc_fai = None
            self.tc_fai = ltp.get_tc_by_nid(nid_fai)
        except PSTException as e:
            log_error(e)


    def __repr__(self):

        return 'Folder: %s, submessages: %s, subfolders: %s' % (self.DisplayName, len(self.submessages), self.subfolders)



class SubAttachment:

    def __init__(self, nid, AttachmentSize, AttachFilename, AttachLongFilename):

        self.nid, self.AttachmentSize, self.AttachFilename, self.AttachLongFilename = nid, AttachmentSize, AttachFilename, AttachLongFilename
        if self.AttachLongFilename:
            self.Filename = self.AttachLongFilename
        else:
            self.Filename = self.AttachFilename
        if self.Filename:
            self.Filename = os.path.basename(self.Filename)
        else:
            self.Filename = '[None]'

    def __repr__(self):

        return '%s (%s)' % (self.Filename, size_friendly(self.AttachmentSize))



class SubRecipient:

    def __init__(self, RecipientType, DisplayName, ObjectType, AddressType, EmailAddress, DisplayType, EntryID, SmtpAddress):

        self.RecipientType, self.DisplayName, self.ObjectType, self.AddressType, self.EmailAddress, self.DisplayType, self.EntryID, self.SmtpAddress = RecipientType, DisplayName, ObjectType, AddressType, EmailAddress, DisplayType, EntryID, SmtpAddress


    def __repr__(self):

        return '%s (%s)' % (self.DisplayName, self.EmailAddress)


class Message:

    mfRead = 0x01
    mfUnsent = 0x08
    mfUnmodified = 0x02
    mfHasAttach = 0x10
    mfFromMe = 0x20
    mfFAI = 0x40
    mfNotifyRead = 0x100
    mfNotifyUnread = 0x200
    mfInternet = 0x2000

    afByValue = 0x01
    afEmbeddedMessage = 0x05
    afStorage = 0x06


    def __init__(self, nid, ltp, nbd=None, parent_message=None, messaging=None):

        self.ltp = ltp

        if parent_message:
            subnode = parent_message.pc.hn.subnodes[nid]
            datas = nbd.fetch_all_block_data(subnode.bidData)
            hn = HN(subnode, ltp, datas)
            self.pc = PC(hn)
        else:
            if nid.nidType != NID.NID_TYPE_NORMAL_MESSAGE:
                raise PSTException('Invalid Message NID Type: %s' % nid_pc.nidType)
            self.pc = ltp.get_pc_by_nid(nid)

        # entryids in PST are stored as nids
        self.nid = nid
        if messaging:
            self.EntryId = 4*b'\x00' + messaging.store_record_key + struct.pack('I', nid.nid)

        self.MessageClass = self.pc.getval(PropIdEnum.PidTagMessageClassW)
        self.Subject = ltp.strip_SubjectPrefix(self.pc.getval(PropIdEnum.PidTagSubjectW))
        self.ClientSubmitTime = self.pc.getval(PropIdEnum.PidTagClientSubmitTime)
        self.SentRepresentingName = self.pc.getval(PropIdEnum.PidTagSentRepresentingNameW)
        self.SenderName = self.pc.getval(PropIdEnum.PidTagSenderName)
        self.SenderSmtpAddress = self.pc.getval(PropIdEnum.PidTagSenderSmtpAddress)
        self.MessageDeliveryTime = self.pc.getval(PropIdEnum.PidTagMessageDeliveryTime)
        self.MessageFlags = self.pc.getval(PropIdEnum.PidTagMessageFlags)
        self.MessageStatus = self.pc.getval(PropIdEnum.PidTagMessageStatus)
        self.HasAttachments  = (self.MessageFlags & Message.mfHasAttach == Message.mfHasAttach)
        self.MessageSize = self.pc.getval(PropIdEnum.PidTagMessageSize)
        self.Body = self.pc.getval(PropIdEnum.PidTagBody)
        self.Read = (self.MessageFlags & Message.mfRead == Message.mfRead)
        self.TransportMessageHeaders = self.pc.getval(PropIdEnum.PidTagTransportMessageHeaders)
        self.DisplayTo = self.pc.getval(PropIdEnum.PidTagDisplayToW)
        self.XOriginatingIP =  self.pc.getval(0x8028) # x-originating-ip

        self.tc_attachments = None
        self.tc_recipients = None
        if self.pc.hn.subnodes:
            for subnode in self.pc.hn.subnodes.values(): #SLENTRYs
                if subnode.nid.nidType == NID.NID_TYPE_ATTACHMENT_TABLE:
                    self.tc_attachments = self.ltp.get_tc_by_slentry(subnode)
                elif subnode.nid.nidType == NID.NID_TYPE_RECIPIENT_TABLE:
                    self.tc_recipients = ltp.get_tc_by_slentry(subnode)

        self.subattachments = []
        if self.tc_attachments:
            self.subattachments = [SubAttachment(self.tc_attachments.RowIndex[RowIndex].nid, self.tc_attachments.getval(RowIndex,PropIdEnum.PidTagAttachmentSize), \
                    self.tc_attachments.getval(RowIndex,PropIdEnum.PidTagAttachFilename), self.tc_attachments.getval(RowIndex,PropIdEnum.PidTagAttachLongFilename)) for RowIndex in range(len(self.tc_attachments.RowIndex))]

        self.subrecipients = []
        if self.tc_recipients:
            self.subrecipients = [SubRecipient(self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagRecipientType), self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagDisplayName), \
                    self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagObjectType), self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagAddressType), \
                    self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagEmailAddress), self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagDisplayType), self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagEntryID),
                    self.tc_recipients.getval(RowIndex,PropIdEnum.PidTagSmtpAddress)) for RowIndex in range(len(self.tc_recipients.RowIndex))]


    def get_attachment(self, subattachment):
        """ fetch attachment on demand, not when Message instanced"""

        return Attachment(self.ltp, self.pc.hn.subnodes[subattachment.nid.nid])


    def get_all_properties(self):

        return self.pc.__repr__()


    def __repr__(self):

        attachments = ', '.join(['%s' % subattachment for subattachment in self.subattachments])
        return 'Message: %s, From: %s, %s, Size: %s, Attachments: %s' % (repr(self.Subject), repr(self.SentRepresentingName), self.ClientSubmitTime, size_friendly(self.MessageSize), attachments)



class Attachment:

    def __init__(self, ltp, slentry):

        self.ltp = ltp
        self.slentry = slentry
        self.pc = self.ltp.get_pc_by_slentry(slentry)

        self.DisplayName = self.pc.getval(PropIdEnum.PidTagDisplayName)
        self.AttachMethod = self.pc.getval(PropIdEnum.PidTagAttachMethod)
        self.AttachmentSize = self.pc.getval(PropIdEnum.PidTagAttachmentSize)
        self.AttachFilename = self.pc.getval(PropIdEnum.PidTagAttachFilename) # 8.3 short name
        self.AttachLongFilename = self.pc.getval(PropIdEnum.PidTagAttachLongFilename)
        if self.AttachLongFilename:
            self.Filename = self.AttachLongFilename
        else:
            self.Filename = self.AttachFilename
        if self.Filename:
            self.Filename = os.path.basename(self.Filename)
        else:
            self.Filename = '[NoFilename_Method%s]' % self.AttachMethod

        if self.AttachMethod == Message.afByValue:
            self.data = self.pc.getval(PropIdEnum.PidTagAttachDataBinary)
        else:
            self.data = self.pc.getval(PropIdEnum.PidTagAttachDataObject)
            #raise PSTException('Unsupported Attachment Method %s' % self.AttachMethod)
        self.AttachMimeTag = self.pc.getval(PropIdEnum.PidTagAttachMimeTag)
        self.AttachExtension = self.pc.getval(PropIdEnum.PidTagAttachExtension)


    def get_all_properties(self):

        return self.pc.__repr__()



class NAMEID:

    def __init__(self, bytes):

        self.dwPropertyID, self.wGuid, self.wPropIdx  = struct.unpack('IHH', bytes)
        self.N = self.wGuid & 0x01
        self.wGuid = self.wGuid >> 1
        self.NPID = self.wPropIdx + 0x8000



class Messaging:
    """Messaging Layer"""

    def __init__(self, ltp):

        self.ltp = ltp
        self.set_message_store()
        try:
            self.set_name_to_id_map()
        except PSTException as e:
            log_error(e)


    def set_message_store(self):

        self.message_store = self.ltp.get_pc_by_nid(NID(NID.NID_MESSAGE_STORE))
        self.store_record_key = self.message_store.getval(PropIdEnum.PidTagRecordKey)

        if PropIdEnum.PidTagPstPassword in self.message_store.props.keys():
            self.PasswordCRC32Hash = struct.unpack('I', struct.pack('i', self.message_store.getval(PropIdEnum.PidTagPstPassword)))[0]
        else:
            self.PasswordCRC32Hash = None
        self.root_entryid = self.message_store.getval(PropIdEnum.PidTagIpmSubTreeEntryId)
        self.deleted_items_entryid = self.message_store.getval(PropIdEnum.PidTagIpmWastebasketEntryId)


    def set_name_to_id_map(self):

        self.nameid_entries = []
        self.pc_name_to_id_map = self.ltp.get_pc_by_nid(NID(NID.NID_NAME_TO_ID_MAP))

        nameid_entrystream = self.pc_name_to_id_map.getval(PropIdEnum.PidTagNameidStreamEntry)
        self.nameid_entries = [NAMEID(nameid_entrystream[i*8:(i+1)*8]) for i in range(len(nameid_entrystream)//8)]
        nameid_stringstream = self.pc_name_to_id_map.getval(PropIdEnum.PidTagNameidStreamString)
        nameid_guidstream = self.pc_name_to_id_map.getval(PropIdEnum.PidTagNameidStreamGuid)
        for nameid in self.nameid_entries:
            if nameid.N == 1:
                name_len = struct.unpack('I', nameid_stringstream[nameid.dwPropertyID:nameid.dwPropertyID+4])[0]
                nameid.name = nameid_stringstream[nameid.dwPropertyID+4:nameid.dwPropertyID+4+name_len].decode('utf-16-le') # unicode
            if nameid.wGuid == 0:
                nameid.guid = None
            elif nameid.wGuid == 1: # PS_MAPI
                nameid.guid = b'(\x03\x02\x00\x00\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x00F'
            elif nameid.wGuid == 2: # PS_PUBLIC_STRINGS
                nameid.guid = b')\x03\x02\x00\x00\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x00F'
            else:
                nameid.guid = nameid_guidstream[16*(nameid.wGuid-3):16*(nameid.wGuid-2)]


    def get_folder(self, entryid, parent_path=''):

        return Folder(entryid.nid, self.ltp, parent_path, self)


    def get_named_properties(self):

        return '\n'.join(['%s = %s' % (hex(nameid.NPID), repr(nameid.name)) for nameid in self.nameid_entries if nameid.N==1])


#############################################################################################################################
#  ____  ____ _____   _
# |  _ \/ ___|_   _| | |    __ _ _   _  ___ _ __
# | |_) \___ \ | |   | |   / _` | | | |/ _ \ '__|
# |  __/ ___) || |   | |__| (_| | |_| |  __/ |
# |_|   |____/ |_|   |_____\__,_|\__, |\___|_|
#                                |___/
#############################################################################################################################


class CRC:

    CrcTableOffset32 = (0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
                        0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
                        0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
                        0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
                        0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
                        0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
                        0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
                        0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
                        0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
                        0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
                        0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
                        0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
                        0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
                        0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
                        0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
                        0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
                        0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
                        0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
                        0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
                        0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
                        0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
                        0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
                        0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
                        0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
                        0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
                        0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
                        0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
                        0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
                        0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
                        0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
                        0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
                        0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D)

    CrcTableOffset40 = (0x00000000, 0x191B3141, 0x32366282, 0x2B2D53C3, 0x646CC504, 0x7D77F445, 0x565AA786, 0x4F4196C7,
                        0xC8D98A08, 0xD1C2BB49, 0xFAEFE88A, 0xE3F4D9CB, 0xACB54F0C, 0xB5AE7E4D, 0x9E832D8E, 0x87981CCF,
                        0x4AC21251, 0x53D92310, 0x78F470D3, 0x61EF4192, 0x2EAED755, 0x37B5E614, 0x1C98B5D7, 0x05838496,
                        0x821B9859, 0x9B00A918, 0xB02DFADB, 0xA936CB9A, 0xE6775D5D, 0xFF6C6C1C, 0xD4413FDF, 0xCD5A0E9E,
                        0x958424A2, 0x8C9F15E3, 0xA7B24620, 0xBEA97761, 0xF1E8E1A6, 0xE8F3D0E7, 0xC3DE8324, 0xDAC5B265,
                        0x5D5DAEAA, 0x44469FEB, 0x6F6BCC28, 0x7670FD69, 0x39316BAE, 0x202A5AEF, 0x0B07092C, 0x121C386D,
                        0xDF4636F3, 0xC65D07B2, 0xED705471, 0xF46B6530, 0xBB2AF3F7, 0xA231C2B6, 0x891C9175, 0x9007A034,
                        0x179FBCFB, 0x0E848DBA, 0x25A9DE79, 0x3CB2EF38, 0x73F379FF, 0x6AE848BE, 0x41C51B7D, 0x58DE2A3C,
                        0xF0794F05, 0xE9627E44, 0xC24F2D87, 0xDB541CC6, 0x94158A01, 0x8D0EBB40, 0xA623E883, 0xBF38D9C2,
                        0x38A0C50D, 0x21BBF44C, 0x0A96A78F, 0x138D96CE, 0x5CCC0009, 0x45D73148, 0x6EFA628B, 0x77E153CA,
                        0xBABB5D54, 0xA3A06C15, 0x888D3FD6, 0x91960E97, 0xDED79850, 0xC7CCA911, 0xECE1FAD2, 0xF5FACB93,
                        0x7262D75C, 0x6B79E61D, 0x4054B5DE, 0x594F849F, 0x160E1258, 0x0F152319, 0x243870DA, 0x3D23419B,
                        0x65FD6BA7, 0x7CE65AE6, 0x57CB0925, 0x4ED03864, 0x0191AEA3, 0x188A9FE2, 0x33A7CC21, 0x2ABCFD60,
                        0xAD24E1AF, 0xB43FD0EE, 0x9F12832D, 0x8609B26C, 0xC94824AB, 0xD05315EA, 0xFB7E4629, 0xE2657768,
                        0x2F3F79F6, 0x362448B7, 0x1D091B74, 0x04122A35, 0x4B53BCF2, 0x52488DB3, 0x7965DE70, 0x607EEF31,
                        0xE7E6F3FE, 0xFEFDC2BF, 0xD5D0917C, 0xCCCBA03D, 0x838A36FA, 0x9A9107BB, 0xB1BC5478, 0xA8A76539,
                        0x3B83984B, 0x2298A90A, 0x09B5FAC9, 0x10AECB88, 0x5FEF5D4F, 0x46F46C0E, 0x6DD93FCD, 0x74C20E8C,
                        0xF35A1243, 0xEA412302, 0xC16C70C1, 0xD8774180, 0x9736D747, 0x8E2DE606, 0xA500B5C5, 0xBC1B8484,
                        0x71418A1A, 0x685ABB5B, 0x4377E898, 0x5A6CD9D9, 0x152D4F1E, 0x0C367E5F, 0x271B2D9C, 0x3E001CDD,
                        0xB9980012, 0xA0833153, 0x8BAE6290, 0x92B553D1, 0xDDF4C516, 0xC4EFF457, 0xEFC2A794, 0xF6D996D5,
                        0xAE07BCE9, 0xB71C8DA8, 0x9C31DE6B, 0x852AEF2A, 0xCA6B79ED, 0xD37048AC, 0xF85D1B6F, 0xE1462A2E,
                        0x66DE36E1, 0x7FC507A0, 0x54E85463, 0x4DF36522, 0x02B2F3E5, 0x1BA9C2A4, 0x30849167, 0x299FA026,
                        0xE4C5AEB8, 0xFDDE9FF9, 0xD6F3CC3A, 0xCFE8FD7B, 0x80A96BBC, 0x99B25AFD, 0xB29F093E, 0xAB84387F,
                        0x2C1C24B0, 0x350715F1, 0x1E2A4632, 0x07317773, 0x4870E1B4, 0x516BD0F5, 0x7A468336, 0x635DB277,
                        0xCBFAD74E, 0xD2E1E60F, 0xF9CCB5CC, 0xE0D7848D, 0xAF96124A, 0xB68D230B, 0x9DA070C8, 0x84BB4189,
                        0x03235D46, 0x1A386C07, 0x31153FC4, 0x280E0E85, 0x674F9842, 0x7E54A903, 0x5579FAC0, 0x4C62CB81,
                        0x8138C51F, 0x9823F45E, 0xB30EA79D, 0xAA1596DC, 0xE554001B, 0xFC4F315A, 0xD7626299, 0xCE7953D8,
                        0x49E14F17, 0x50FA7E56, 0x7BD72D95, 0x62CC1CD4, 0x2D8D8A13, 0x3496BB52, 0x1FBBE891, 0x06A0D9D0,
                        0x5E7EF3EC, 0x4765C2AD, 0x6C48916E, 0x7553A02F, 0x3A1236E8, 0x230907A9, 0x0824546A, 0x113F652B,
                        0x96A779E4, 0x8FBC48A5, 0xA4911B66, 0xBD8A2A27, 0xF2CBBCE0, 0xEBD08DA1, 0xC0FDDE62, 0xD9E6EF23,
                        0x14BCE1BD, 0x0DA7D0FC, 0x268A833F, 0x3F91B27E, 0x70D024B9, 0x69CB15F8, 0x42E6463B, 0x5BFD777A,
                        0xDC656BB5, 0xC57E5AF4, 0xEE530937, 0xF7483876, 0xB809AEB1, 0xA1129FF0, 0x8A3FCC33, 0x9324FD72)

    CrcTableOffset48 = (0x00000000, 0x01C26A37, 0x0384D46E, 0x0246BE59, 0x0709A8DC, 0x06CBC2EB, 0x048D7CB2, 0x054F1685,
                        0x0E1351B8, 0x0FD13B8F, 0x0D9785D6, 0x0C55EFE1, 0x091AF964, 0x08D89353, 0x0A9E2D0A, 0x0B5C473D,
                        0x1C26A370, 0x1DE4C947, 0x1FA2771E, 0x1E601D29, 0x1B2F0BAC, 0x1AED619B, 0x18ABDFC2, 0x1969B5F5,
                        0x1235F2C8, 0x13F798FF, 0x11B126A6, 0x10734C91, 0x153C5A14, 0x14FE3023, 0x16B88E7A, 0x177AE44D,
                        0x384D46E0, 0x398F2CD7, 0x3BC9928E, 0x3A0BF8B9, 0x3F44EE3C, 0x3E86840B, 0x3CC03A52, 0x3D025065,
                        0x365E1758, 0x379C7D6F, 0x35DAC336, 0x3418A901, 0x3157BF84, 0x3095D5B3, 0x32D36BEA, 0x331101DD,
                        0x246BE590, 0x25A98FA7, 0x27EF31FE, 0x262D5BC9, 0x23624D4C, 0x22A0277B, 0x20E69922, 0x2124F315,
                        0x2A78B428, 0x2BBADE1F, 0x29FC6046, 0x283E0A71, 0x2D711CF4, 0x2CB376C3, 0x2EF5C89A, 0x2F37A2AD,
                        0x709A8DC0, 0x7158E7F7, 0x731E59AE, 0x72DC3399, 0x7793251C, 0x76514F2B, 0x7417F172, 0x75D59B45,
                        0x7E89DC78, 0x7F4BB64F, 0x7D0D0816, 0x7CCF6221, 0x798074A4, 0x78421E93, 0x7A04A0CA, 0x7BC6CAFD,
                        0x6CBC2EB0, 0x6D7E4487, 0x6F38FADE, 0x6EFA90E9, 0x6BB5866C, 0x6A77EC5B, 0x68315202, 0x69F33835,
                        0x62AF7F08, 0x636D153F, 0x612BAB66, 0x60E9C151, 0x65A6D7D4, 0x6464BDE3, 0x662203BA, 0x67E0698D,
                        0x48D7CB20, 0x4915A117, 0x4B531F4E, 0x4A917579, 0x4FDE63FC, 0x4E1C09CB, 0x4C5AB792, 0x4D98DDA5,
                        0x46C49A98, 0x4706F0AF, 0x45404EF6, 0x448224C1, 0x41CD3244, 0x400F5873, 0x4249E62A, 0x438B8C1D,
                        0x54F16850, 0x55330267, 0x5775BC3E, 0x56B7D609, 0x53F8C08C, 0x523AAABB, 0x507C14E2, 0x51BE7ED5,
                        0x5AE239E8, 0x5B2053DF, 0x5966ED86, 0x58A487B1, 0x5DEB9134, 0x5C29FB03, 0x5E6F455A, 0x5FAD2F6D,
                        0xE1351B80, 0xE0F771B7, 0xE2B1CFEE, 0xE373A5D9, 0xE63CB35C, 0xE7FED96B, 0xE5B86732, 0xE47A0D05,
                        0xEF264A38, 0xEEE4200F, 0xECA29E56, 0xED60F461, 0xE82FE2E4, 0xE9ED88D3, 0xEBAB368A, 0xEA695CBD,
                        0xFD13B8F0, 0xFCD1D2C7, 0xFE976C9E, 0xFF5506A9, 0xFA1A102C, 0xFBD87A1B, 0xF99EC442, 0xF85CAE75,
                        0xF300E948, 0xF2C2837F, 0xF0843D26, 0xF1465711, 0xF4094194, 0xF5CB2BA3, 0xF78D95FA, 0xF64FFFCD,
                        0xD9785D60, 0xD8BA3757, 0xDAFC890E, 0xDB3EE339, 0xDE71F5BC, 0xDFB39F8B, 0xDDF521D2, 0xDC374BE5,
                        0xD76B0CD8, 0xD6A966EF, 0xD4EFD8B6, 0xD52DB281, 0xD062A404, 0xD1A0CE33, 0xD3E6706A, 0xD2241A5D,
                        0xC55EFE10, 0xC49C9427, 0xC6DA2A7E, 0xC7184049, 0xC25756CC, 0xC3953CFB, 0xC1D382A2, 0xC011E895,
                        0xCB4DAFA8, 0xCA8FC59F, 0xC8C97BC6, 0xC90B11F1, 0xCC440774, 0xCD866D43, 0xCFC0D31A, 0xCE02B92D,
                        0x91AF9640, 0x906DFC77, 0x922B422E, 0x93E92819, 0x96A63E9C, 0x976454AB, 0x9522EAF2, 0x94E080C5,
                        0x9FBCC7F8, 0x9E7EADCF, 0x9C381396, 0x9DFA79A1, 0x98B56F24, 0x99770513, 0x9B31BB4A, 0x9AF3D17D,
                        0x8D893530, 0x8C4B5F07, 0x8E0DE15E, 0x8FCF8B69, 0x8A809DEC, 0x8B42F7DB, 0x89044982, 0x88C623B5,
                        0x839A6488, 0x82580EBF, 0x801EB0E6, 0x81DCDAD1, 0x8493CC54, 0x8551A663, 0x8717183A, 0x86D5720D,
                        0xA9E2D0A0, 0xA820BA97, 0xAA6604CE, 0xABA46EF9, 0xAEEB787C, 0xAF29124B, 0xAD6FAC12, 0xACADC625,
                        0xA7F18118, 0xA633EB2F, 0xA4755576, 0xA5B73F41, 0xA0F829C4, 0xA13A43F3, 0xA37CFDAA, 0xA2BE979D,
                        0xB5C473D0, 0xB40619E7, 0xB640A7BE, 0xB782CD89, 0xB2CDDB0C, 0xB30FB13B, 0xB1490F62, 0xB08B6555,
                        0xBBD72268, 0xBA15485F, 0xB853F606, 0xB9919C31, 0xBCDE8AB4, 0xBD1CE083, 0xBF5A5EDA, 0xBE9834ED)

    CrcTableOffset56 = (0x00000000, 0xB8BC6765, 0xAA09C88B, 0x12B5AFEE, 0x8F629757, 0x37DEF032, 0x256B5FDC, 0x9DD738B9,
                        0xC5B428EF, 0x7D084F8A, 0x6FBDE064, 0xD7018701, 0x4AD6BFB8, 0xF26AD8DD, 0xE0DF7733, 0x58631056,
                        0x5019579F, 0xE8A530FA, 0xFA109F14, 0x42ACF871, 0xDF7BC0C8, 0x67C7A7AD, 0x75720843, 0xCDCE6F26,
                        0x95AD7F70, 0x2D111815, 0x3FA4B7FB, 0x8718D09E, 0x1ACFE827, 0xA2738F42, 0xB0C620AC, 0x087A47C9,
                        0xA032AF3E, 0x188EC85B, 0x0A3B67B5, 0xB28700D0, 0x2F503869, 0x97EC5F0C, 0x8559F0E2, 0x3DE59787,
                        0x658687D1, 0xDD3AE0B4, 0xCF8F4F5A, 0x7733283F, 0xEAE41086, 0x525877E3, 0x40EDD80D, 0xF851BF68,
                        0xF02BF8A1, 0x48979FC4, 0x5A22302A, 0xE29E574F, 0x7F496FF6, 0xC7F50893, 0xD540A77D, 0x6DFCC018,
                        0x359FD04E, 0x8D23B72B, 0x9F9618C5, 0x272A7FA0, 0xBAFD4719, 0x0241207C, 0x10F48F92, 0xA848E8F7,
                        0x9B14583D, 0x23A83F58, 0x311D90B6, 0x89A1F7D3, 0x1476CF6A, 0xACCAA80F, 0xBE7F07E1, 0x06C36084,
                        0x5EA070D2, 0xE61C17B7, 0xF4A9B859, 0x4C15DF3C, 0xD1C2E785, 0x697E80E0, 0x7BCB2F0E, 0xC377486B,
                        0xCB0D0FA2, 0x73B168C7, 0x6104C729, 0xD9B8A04C, 0x446F98F5, 0xFCD3FF90, 0xEE66507E, 0x56DA371B,
                        0x0EB9274D, 0xB6054028, 0xA4B0EFC6, 0x1C0C88A3, 0x81DBB01A, 0x3967D77F, 0x2BD27891, 0x936E1FF4,
                        0x3B26F703, 0x839A9066, 0x912F3F88, 0x299358ED, 0xB4446054, 0x0CF80731, 0x1E4DA8DF, 0xA6F1CFBA,
                        0xFE92DFEC, 0x462EB889, 0x549B1767, 0xEC277002, 0x71F048BB, 0xC94C2FDE, 0xDBF98030, 0x6345E755,
                        0x6B3FA09C, 0xD383C7F9, 0xC1366817, 0x798A0F72, 0xE45D37CB, 0x5CE150AE, 0x4E54FF40, 0xF6E89825,
                        0xAE8B8873, 0x1637EF16, 0x048240F8, 0xBC3E279D, 0x21E91F24, 0x99557841, 0x8BE0D7AF, 0x335CB0CA,
                        0xED59B63B, 0x55E5D15E, 0x47507EB0, 0xFFEC19D5, 0x623B216C, 0xDA874609, 0xC832E9E7, 0x708E8E82,
                        0x28ED9ED4, 0x9051F9B1, 0x82E4565F, 0x3A58313A, 0xA78F0983, 0x1F336EE6, 0x0D86C108, 0xB53AA66D,
                        0xBD40E1A4, 0x05FC86C1, 0x1749292F, 0xAFF54E4A, 0x322276F3, 0x8A9E1196, 0x982BBE78, 0x2097D91D,
                        0x78F4C94B, 0xC048AE2E, 0xD2FD01C0, 0x6A4166A5, 0xF7965E1C, 0x4F2A3979, 0x5D9F9697, 0xE523F1F2,
                        0x4D6B1905, 0xF5D77E60, 0xE762D18E, 0x5FDEB6EB, 0xC2098E52, 0x7AB5E937, 0x680046D9, 0xD0BC21BC,
                        0x88DF31EA, 0x3063568F, 0x22D6F961, 0x9A6A9E04, 0x07BDA6BD, 0xBF01C1D8, 0xADB46E36, 0x15080953,
                        0x1D724E9A, 0xA5CE29FF, 0xB77B8611, 0x0FC7E174, 0x9210D9CD, 0x2AACBEA8, 0x38191146, 0x80A57623,
                        0xD8C66675, 0x607A0110, 0x72CFAEFE, 0xCA73C99B, 0x57A4F122, 0xEF189647, 0xFDAD39A9, 0x45115ECC,
                        0x764DEE06, 0xCEF18963, 0xDC44268D, 0x64F841E8, 0xF92F7951, 0x41931E34, 0x5326B1DA, 0xEB9AD6BF,
                        0xB3F9C6E9, 0x0B45A18C, 0x19F00E62, 0xA14C6907, 0x3C9B51BE, 0x842736DB, 0x96929935, 0x2E2EFE50,
                        0x2654B999, 0x9EE8DEFC, 0x8C5D7112, 0x34E11677, 0xA9362ECE, 0x118A49AB, 0x033FE645, 0xBB838120,
                        0xE3E09176, 0x5B5CF613, 0x49E959FD, 0xF1553E98, 0x6C820621, 0xD43E6144, 0xC68BCEAA, 0x7E37A9CF,
                        0xD67F4138, 0x6EC3265D, 0x7C7689B3, 0xC4CAEED6, 0x591DD66F, 0xE1A1B10A, 0xF3141EE4, 0x4BA87981,
                        0x13CB69D7, 0xAB770EB2, 0xB9C2A15C, 0x017EC639, 0x9CA9FE80, 0x241599E5, 0x36A0360B, 0x8E1C516E,
                        0x866616A7, 0x3EDA71C2, 0x2C6FDE2C, 0x94D3B949, 0x090481F0, 0xB1B8E695, 0xA30D497B, 0x1BB12E1E,
                        0x43D23E48, 0xFB6E592D, 0xE9DBF6C3, 0x516791A6, 0xCCB0A91F, 0x740CCE7A, 0x66B96194, 0xDE0506F1)

    CrcTableOffset64 = (0x00000000, 0x3D6029B0, 0x7AC05360, 0x47A07AD0, 0xF580A6C0, 0xC8E08F70, 0x8F40F5A0, 0xB220DC10,
                        0x30704BC1, 0x0D106271, 0x4AB018A1, 0x77D03111, 0xC5F0ED01, 0xF890C4B1, 0xBF30BE61, 0x825097D1,
                        0x60E09782, 0x5D80BE32, 0x1A20C4E2, 0x2740ED52, 0x95603142, 0xA80018F2, 0xEFA06222, 0xD2C04B92,
                        0x5090DC43, 0x6DF0F5F3, 0x2A508F23, 0x1730A693, 0xA5107A83, 0x98705333, 0xDFD029E3, 0xE2B00053,
                        0xC1C12F04, 0xFCA106B4, 0xBB017C64, 0x866155D4, 0x344189C4, 0x0921A074, 0x4E81DAA4, 0x73E1F314,
                        0xF1B164C5, 0xCCD14D75, 0x8B7137A5, 0xB6111E15, 0x0431C205, 0x3951EBB5, 0x7EF19165, 0x4391B8D5,
                        0xA121B886, 0x9C419136, 0xDBE1EBE6, 0xE681C256, 0x54A11E46, 0x69C137F6, 0x2E614D26, 0x13016496,
                        0x9151F347, 0xAC31DAF7, 0xEB91A027, 0xD6F18997, 0x64D15587, 0x59B17C37, 0x1E1106E7, 0x23712F57,
                        0x58F35849, 0x659371F9, 0x22330B29, 0x1F532299, 0xAD73FE89, 0x9013D739, 0xD7B3ADE9, 0xEAD38459,
                        0x68831388, 0x55E33A38, 0x124340E8, 0x2F236958, 0x9D03B548, 0xA0639CF8, 0xE7C3E628, 0xDAA3CF98,
                        0x3813CFCB, 0x0573E67B, 0x42D39CAB, 0x7FB3B51B, 0xCD93690B, 0xF0F340BB, 0xB7533A6B, 0x8A3313DB,
                        0x0863840A, 0x3503ADBA, 0x72A3D76A, 0x4FC3FEDA, 0xFDE322CA, 0xC0830B7A, 0x872371AA, 0xBA43581A,
                        0x9932774D, 0xA4525EFD, 0xE3F2242D, 0xDE920D9D, 0x6CB2D18D, 0x51D2F83D, 0x167282ED, 0x2B12AB5D,
                        0xA9423C8C, 0x9422153C, 0xD3826FEC, 0xEEE2465C, 0x5CC29A4C, 0x61A2B3FC, 0x2602C92C, 0x1B62E09C,
                        0xF9D2E0CF, 0xC4B2C97F, 0x8312B3AF, 0xBE729A1F, 0x0C52460F, 0x31326FBF, 0x7692156F, 0x4BF23CDF,
                        0xC9A2AB0E, 0xF4C282BE, 0xB362F86E, 0x8E02D1DE, 0x3C220DCE, 0x0142247E, 0x46E25EAE, 0x7B82771E,
                        0xB1E6B092, 0x8C869922, 0xCB26E3F2, 0xF646CA42, 0x44661652, 0x79063FE2, 0x3EA64532, 0x03C66C82,
                        0x8196FB53, 0xBCF6D2E3, 0xFB56A833, 0xC6368183, 0x74165D93, 0x49767423, 0x0ED60EF3, 0x33B62743,
                        0xD1062710, 0xEC660EA0, 0xABC67470, 0x96A65DC0, 0x248681D0, 0x19E6A860, 0x5E46D2B0, 0x6326FB00,
                        0xE1766CD1, 0xDC164561, 0x9BB63FB1, 0xA6D61601, 0x14F6CA11, 0x2996E3A1, 0x6E369971, 0x5356B0C1,
                        0x70279F96, 0x4D47B626, 0x0AE7CCF6, 0x3787E546, 0x85A73956, 0xB8C710E6, 0xFF676A36, 0xC2074386,
                        0x4057D457, 0x7D37FDE7, 0x3A978737, 0x07F7AE87, 0xB5D77297, 0x88B75B27, 0xCF1721F7, 0xF2770847,
                        0x10C70814, 0x2DA721A4, 0x6A075B74, 0x576772C4, 0xE547AED4, 0xD8278764, 0x9F87FDB4, 0xA2E7D404,
                        0x20B743D5, 0x1DD76A65, 0x5A7710B5, 0x67173905, 0xD537E515, 0xE857CCA5, 0xAFF7B675, 0x92979FC5,
                        0xE915E8DB, 0xD475C16B, 0x93D5BBBB, 0xAEB5920B, 0x1C954E1B, 0x21F567AB, 0x66551D7B, 0x5B3534CB,
                        0xD965A31A, 0xE4058AAA, 0xA3A5F07A, 0x9EC5D9CA, 0x2CE505DA, 0x11852C6A, 0x562556BA, 0x6B457F0A,
                        0x89F57F59, 0xB49556E9, 0xF3352C39, 0xCE550589, 0x7C75D999, 0x4115F029, 0x06B58AF9, 0x3BD5A349,
                        0xB9853498, 0x84E51D28, 0xC34567F8, 0xFE254E48, 0x4C059258, 0x7165BBE8, 0x36C5C138, 0x0BA5E888,
                        0x28D4C7DF, 0x15B4EE6F, 0x521494BF, 0x6F74BD0F, 0xDD54611F, 0xE03448AF, 0xA794327F, 0x9AF41BCF,
                        0x18A48C1E, 0x25C4A5AE, 0x6264DF7E, 0x5F04F6CE, 0xED242ADE, 0xD044036E, 0x97E479BE, 0xAA84500E,
                        0x4834505D, 0x755479ED, 0x32F4033D, 0x0F942A8D, 0xBDB4F69D, 0x80D4DF2D, 0xC774A5FD, 0xFA148C4D,
                        0x78441B9C, 0x4524322C, 0x028448FC, 0x3FE4614C, 0x8DC4BD5C, 0xB0A494EC, 0xF704EE3C, 0xCA64C78C)

    CrcTableOffset72 = (0x00000000, 0xCB5CD3A5, 0x4DC8A10B, 0x869472AE, 0x9B914216, 0x50CD91B3, 0xD659E31D, 0x1D0530B8,
                        0xEC53826D, 0x270F51C8, 0xA19B2366, 0x6AC7F0C3, 0x77C2C07B, 0xBC9E13DE, 0x3A0A6170, 0xF156B2D5,
                        0x03D6029B, 0xC88AD13E, 0x4E1EA390, 0x85427035, 0x9847408D, 0x531B9328, 0xD58FE186, 0x1ED33223,
                        0xEF8580F6, 0x24D95353, 0xA24D21FD, 0x6911F258, 0x7414C2E0, 0xBF481145, 0x39DC63EB, 0xF280B04E,
                        0x07AC0536, 0xCCF0D693, 0x4A64A43D, 0x81387798, 0x9C3D4720, 0x57619485, 0xD1F5E62B, 0x1AA9358E,
                        0xEBFF875B, 0x20A354FE, 0xA6372650, 0x6D6BF5F5, 0x706EC54D, 0xBB3216E8, 0x3DA66446, 0xF6FAB7E3,
                        0x047A07AD, 0xCF26D408, 0x49B2A6A6, 0x82EE7503, 0x9FEB45BB, 0x54B7961E, 0xD223E4B0, 0x197F3715,
                        0xE82985C0, 0x23755665, 0xA5E124CB, 0x6EBDF76E, 0x73B8C7D6, 0xB8E41473, 0x3E7066DD, 0xF52CB578,
                        0x0F580A6C, 0xC404D9C9, 0x4290AB67, 0x89CC78C2, 0x94C9487A, 0x5F959BDF, 0xD901E971, 0x125D3AD4,
                        0xE30B8801, 0x28575BA4, 0xAEC3290A, 0x659FFAAF, 0x789ACA17, 0xB3C619B2, 0x35526B1C, 0xFE0EB8B9,
                        0x0C8E08F7, 0xC7D2DB52, 0x4146A9FC, 0x8A1A7A59, 0x971F4AE1, 0x5C439944, 0xDAD7EBEA, 0x118B384F,
                        0xE0DD8A9A, 0x2B81593F, 0xAD152B91, 0x6649F834, 0x7B4CC88C, 0xB0101B29, 0x36846987, 0xFDD8BA22,
                        0x08F40F5A, 0xC3A8DCFF, 0x453CAE51, 0x8E607DF4, 0x93654D4C, 0x58399EE9, 0xDEADEC47, 0x15F13FE2,
                        0xE4A78D37, 0x2FFB5E92, 0xA96F2C3C, 0x6233FF99, 0x7F36CF21, 0xB46A1C84, 0x32FE6E2A, 0xF9A2BD8F,
                        0x0B220DC1, 0xC07EDE64, 0x46EAACCA, 0x8DB67F6F, 0x90B34FD7, 0x5BEF9C72, 0xDD7BEEDC, 0x16273D79,
                        0xE7718FAC, 0x2C2D5C09, 0xAAB92EA7, 0x61E5FD02, 0x7CE0CDBA, 0xB7BC1E1F, 0x31286CB1, 0xFA74BF14,
                        0x1EB014D8, 0xD5ECC77D, 0x5378B5D3, 0x98246676, 0x852156CE, 0x4E7D856B, 0xC8E9F7C5, 0x03B52460,
                        0xF2E396B5, 0x39BF4510, 0xBF2B37BE, 0x7477E41B, 0x6972D4A3, 0xA22E0706, 0x24BA75A8, 0xEFE6A60D,
                        0x1D661643, 0xD63AC5E6, 0x50AEB748, 0x9BF264ED, 0x86F75455, 0x4DAB87F0, 0xCB3FF55E, 0x006326FB,
                        0xF135942E, 0x3A69478B, 0xBCFD3525, 0x77A1E680, 0x6AA4D638, 0xA1F8059D, 0x276C7733, 0xEC30A496,
                        0x191C11EE, 0xD240C24B, 0x54D4B0E5, 0x9F886340, 0x828D53F8, 0x49D1805D, 0xCF45F2F3, 0x04192156,
                        0xF54F9383, 0x3E134026, 0xB8873288, 0x73DBE12D, 0x6EDED195, 0xA5820230, 0x2316709E, 0xE84AA33B,
                        0x1ACA1375, 0xD196C0D0, 0x5702B27E, 0x9C5E61DB, 0x815B5163, 0x4A0782C6, 0xCC93F068, 0x07CF23CD,
                        0xF6999118, 0x3DC542BD, 0xBB513013, 0x700DE3B6, 0x6D08D30E, 0xA65400AB, 0x20C07205, 0xEB9CA1A0,
                        0x11E81EB4, 0xDAB4CD11, 0x5C20BFBF, 0x977C6C1A, 0x8A795CA2, 0x41258F07, 0xC7B1FDA9, 0x0CED2E0C,
                        0xFDBB9CD9, 0x36E74F7C, 0xB0733DD2, 0x7B2FEE77, 0x662ADECF, 0xAD760D6A, 0x2BE27FC4, 0xE0BEAC61,
                        0x123E1C2F, 0xD962CF8A, 0x5FF6BD24, 0x94AA6E81, 0x89AF5E39, 0x42F38D9C, 0xC467FF32, 0x0F3B2C97,
                        0xFE6D9E42, 0x35314DE7, 0xB3A53F49, 0x78F9ECEC, 0x65FCDC54, 0xAEA00FF1, 0x28347D5F, 0xE368AEFA,
                        0x16441B82, 0xDD18C827, 0x5B8CBA89, 0x90D0692C, 0x8DD55994, 0x46898A31, 0xC01DF89F, 0x0B412B3A,
                        0xFA1799EF, 0x314B4A4A, 0xB7DF38E4, 0x7C83EB41, 0x6186DBF9, 0xAADA085C, 0x2C4E7AF2, 0xE712A957,
                        0x15921919, 0xDECECABC, 0x585AB812, 0x93066BB7, 0x8E035B0F, 0x455F88AA, 0xC3CBFA04, 0x089729A1,
                        0xF9C19B74, 0x329D48D1, 0xB4093A7F, 0x7F55E9DA, 0x6250D962, 0xA90C0AC7, 0x2F987869, 0xE4C4ABCC)

    CrcTableOffset80 = (0x00000000, 0xA6770BB4, 0x979F1129, 0x31E81A9D, 0xF44F2413, 0x52382FA7, 0x63D0353A, 0xC5A73E8E,
                        0x33EF4E67, 0x959845D3, 0xA4705F4E, 0x020754FA, 0xC7A06A74, 0x61D761C0, 0x503F7B5D, 0xF64870E9,
                        0x67DE9CCE, 0xC1A9977A, 0xF0418DE7, 0x56368653, 0x9391B8DD, 0x35E6B369, 0x040EA9F4, 0xA279A240,
                        0x5431D2A9, 0xF246D91D, 0xC3AEC380, 0x65D9C834, 0xA07EF6BA, 0x0609FD0E, 0x37E1E793, 0x9196EC27,
                        0xCFBD399C, 0x69CA3228, 0x582228B5, 0xFE552301, 0x3BF21D8F, 0x9D85163B, 0xAC6D0CA6, 0x0A1A0712,
                        0xFC5277FB, 0x5A257C4F, 0x6BCD66D2, 0xCDBA6D66, 0x081D53E8, 0xAE6A585C, 0x9F8242C1, 0x39F54975,
                        0xA863A552, 0x0E14AEE6, 0x3FFCB47B, 0x998BBFCF, 0x5C2C8141, 0xFA5B8AF5, 0xCBB39068, 0x6DC49BDC,
                        0x9B8CEB35, 0x3DFBE081, 0x0C13FA1C, 0xAA64F1A8, 0x6FC3CF26, 0xC9B4C492, 0xF85CDE0F, 0x5E2BD5BB,
                        0x440B7579, 0xE27C7ECD, 0xD3946450, 0x75E36FE4, 0xB044516A, 0x16335ADE, 0x27DB4043, 0x81AC4BF7,
                        0x77E43B1E, 0xD19330AA, 0xE07B2A37, 0x460C2183, 0x83AB1F0D, 0x25DC14B9, 0x14340E24, 0xB2430590,
                        0x23D5E9B7, 0x85A2E203, 0xB44AF89E, 0x123DF32A, 0xD79ACDA4, 0x71EDC610, 0x4005DC8D, 0xE672D739,
                        0x103AA7D0, 0xB64DAC64, 0x87A5B6F9, 0x21D2BD4D, 0xE47583C3, 0x42028877, 0x73EA92EA, 0xD59D995E,
                        0x8BB64CE5, 0x2DC14751, 0x1C295DCC, 0xBA5E5678, 0x7FF968F6, 0xD98E6342, 0xE86679DF, 0x4E11726B,
                        0xB8590282, 0x1E2E0936, 0x2FC613AB, 0x89B1181F, 0x4C162691, 0xEA612D25, 0xDB8937B8, 0x7DFE3C0C,
                        0xEC68D02B, 0x4A1FDB9F, 0x7BF7C102, 0xDD80CAB6, 0x1827F438, 0xBE50FF8C, 0x8FB8E511, 0x29CFEEA5,
                        0xDF879E4C, 0x79F095F8, 0x48188F65, 0xEE6F84D1, 0x2BC8BA5F, 0x8DBFB1EB, 0xBC57AB76, 0x1A20A0C2,
                        0x8816EAF2, 0x2E61E146, 0x1F89FBDB, 0xB9FEF06F, 0x7C59CEE1, 0xDA2EC555, 0xEBC6DFC8, 0x4DB1D47C,
                        0xBBF9A495, 0x1D8EAF21, 0x2C66B5BC, 0x8A11BE08, 0x4FB68086, 0xE9C18B32, 0xD82991AF, 0x7E5E9A1B,
                        0xEFC8763C, 0x49BF7D88, 0x78576715, 0xDE206CA1, 0x1B87522F, 0xBDF0599B, 0x8C184306, 0x2A6F48B2,
                        0xDC27385B, 0x7A5033EF, 0x4BB82972, 0xEDCF22C6, 0x28681C48, 0x8E1F17FC, 0xBFF70D61, 0x198006D5,
                        0x47ABD36E, 0xE1DCD8DA, 0xD034C247, 0x7643C9F3, 0xB3E4F77D, 0x1593FCC9, 0x247BE654, 0x820CEDE0,
                        0x74449D09, 0xD23396BD, 0xE3DB8C20, 0x45AC8794, 0x800BB91A, 0x267CB2AE, 0x1794A833, 0xB1E3A387,
                        0x20754FA0, 0x86024414, 0xB7EA5E89, 0x119D553D, 0xD43A6BB3, 0x724D6007, 0x43A57A9A, 0xE5D2712E,
                        0x139A01C7, 0xB5ED0A73, 0x840510EE, 0x22721B5A, 0xE7D525D4, 0x41A22E60, 0x704A34FD, 0xD63D3F49,
                        0xCC1D9F8B, 0x6A6A943F, 0x5B828EA2, 0xFDF58516, 0x3852BB98, 0x9E25B02C, 0xAFCDAAB1, 0x09BAA105,
                        0xFFF2D1EC, 0x5985DA58, 0x686DC0C5, 0xCE1ACB71, 0x0BBDF5FF, 0xADCAFE4B, 0x9C22E4D6, 0x3A55EF62,
                        0xABC30345, 0x0DB408F1, 0x3C5C126C, 0x9A2B19D8, 0x5F8C2756, 0xF9FB2CE2, 0xC813367F, 0x6E643DCB,
                        0x982C4D22, 0x3E5B4696, 0x0FB35C0B, 0xA9C457BF, 0x6C636931, 0xCA146285, 0xFBFC7818, 0x5D8B73AC,
                        0x03A0A617, 0xA5D7ADA3, 0x943FB73E, 0x3248BC8A, 0xF7EF8204, 0x519889B0, 0x6070932D, 0xC6079899,
                        0x304FE870, 0x9638E3C4, 0xA7D0F959, 0x01A7F2ED, 0xC400CC63, 0x6277C7D7, 0x539FDD4A, 0xF5E8D6FE,
                        0x647E3AD9, 0xC209316D, 0xF3E12BF0, 0x55962044, 0x90311ECA, 0x3646157E, 0x07AE0FE3, 0xA1D90457,
                        0x579174BE, 0xF1E67F0A, 0xC00E6597, 0x66796E23, 0xA3DE50AD, 0x05A95B19, 0x34414184, 0x92364A30)

    CrcTableOffset88 = (0x00000000, 0xCCAA009E, 0x4225077D, 0x8E8F07E3, 0x844A0EFA, 0x48E00E64, 0xC66F0987, 0x0AC50919,
                        0xD3E51BB5, 0x1F4F1B2B, 0x91C01CC8, 0x5D6A1C56, 0x57AF154F, 0x9B0515D1, 0x158A1232, 0xD92012AC,
                        0x7CBB312B, 0xB01131B5, 0x3E9E3656, 0xF23436C8, 0xF8F13FD1, 0x345B3F4F, 0xBAD438AC, 0x767E3832,
                        0xAF5E2A9E, 0x63F42A00, 0xED7B2DE3, 0x21D12D7D, 0x2B142464, 0xE7BE24FA, 0x69312319, 0xA59B2387,
                        0xF9766256, 0x35DC62C8, 0xBB53652B, 0x77F965B5, 0x7D3C6CAC, 0xB1966C32, 0x3F196BD1, 0xF3B36B4F,
                        0x2A9379E3, 0xE639797D, 0x68B67E9E, 0xA41C7E00, 0xAED97719, 0x62737787, 0xECFC7064, 0x205670FA,
                        0x85CD537D, 0x496753E3, 0xC7E85400, 0x0B42549E, 0x01875D87, 0xCD2D5D19, 0x43A25AFA, 0x8F085A64,
                        0x562848C8, 0x9A824856, 0x140D4FB5, 0xD8A74F2B, 0xD2624632, 0x1EC846AC, 0x9047414F, 0x5CED41D1,
                        0x299DC2ED, 0xE537C273, 0x6BB8C590, 0xA712C50E, 0xADD7CC17, 0x617DCC89, 0xEFF2CB6A, 0x2358CBF4,
                        0xFA78D958, 0x36D2D9C6, 0xB85DDE25, 0x74F7DEBB, 0x7E32D7A2, 0xB298D73C, 0x3C17D0DF, 0xF0BDD041,
                        0x5526F3C6, 0x998CF358, 0x1703F4BB, 0xDBA9F425, 0xD16CFD3C, 0x1DC6FDA2, 0x9349FA41, 0x5FE3FADF,
                        0x86C3E873, 0x4A69E8ED, 0xC4E6EF0E, 0x084CEF90, 0x0289E689, 0xCE23E617, 0x40ACE1F4, 0x8C06E16A,
                        0xD0EBA0BB, 0x1C41A025, 0x92CEA7C6, 0x5E64A758, 0x54A1AE41, 0x980BAEDF, 0x1684A93C, 0xDA2EA9A2,
                        0x030EBB0E, 0xCFA4BB90, 0x412BBC73, 0x8D81BCED, 0x8744B5F4, 0x4BEEB56A, 0xC561B289, 0x09CBB217,
                        0xAC509190, 0x60FA910E, 0xEE7596ED, 0x22DF9673, 0x281A9F6A, 0xE4B09FF4, 0x6A3F9817, 0xA6959889,
                        0x7FB58A25, 0xB31F8ABB, 0x3D908D58, 0xF13A8DC6, 0xFBFF84DF, 0x37558441, 0xB9DA83A2, 0x7570833C,
                        0x533B85DA, 0x9F918544, 0x111E82A7, 0xDDB48239, 0xD7718B20, 0x1BDB8BBE, 0x95548C5D, 0x59FE8CC3,
                        0x80DE9E6F, 0x4C749EF1, 0xC2FB9912, 0x0E51998C, 0x04949095, 0xC83E900B, 0x46B197E8, 0x8A1B9776,
                        0x2F80B4F1, 0xE32AB46F, 0x6DA5B38C, 0xA10FB312, 0xABCABA0B, 0x6760BA95, 0xE9EFBD76, 0x2545BDE8,
                        0xFC65AF44, 0x30CFAFDA, 0xBE40A839, 0x72EAA8A7, 0x782FA1BE, 0xB485A120, 0x3A0AA6C3, 0xF6A0A65D,
                        0xAA4DE78C, 0x66E7E712, 0xE868E0F1, 0x24C2E06F, 0x2E07E976, 0xE2ADE9E8, 0x6C22EE0B, 0xA088EE95,
                        0x79A8FC39, 0xB502FCA7, 0x3B8DFB44, 0xF727FBDA, 0xFDE2F2C3, 0x3148F25D, 0xBFC7F5BE, 0x736DF520,
                        0xD6F6D6A7, 0x1A5CD639, 0x94D3D1DA, 0x5879D144, 0x52BCD85D, 0x9E16D8C3, 0x1099DF20, 0xDC33DFBE,
                        0x0513CD12, 0xC9B9CD8C, 0x4736CA6F, 0x8B9CCAF1, 0x8159C3E8, 0x4DF3C376, 0xC37CC495, 0x0FD6C40B,
                        0x7AA64737, 0xB60C47A9, 0x3883404A, 0xF42940D4, 0xFEEC49CD, 0x32464953, 0xBCC94EB0, 0x70634E2E,
                        0xA9435C82, 0x65E95C1C, 0xEB665BFF, 0x27CC5B61, 0x2D095278, 0xE1A352E6, 0x6F2C5505, 0xA386559B,
                        0x061D761C, 0xCAB77682, 0x44387161, 0x889271FF, 0x825778E6, 0x4EFD7878, 0xC0727F9B, 0x0CD87F05,
                        0xD5F86DA9, 0x19526D37, 0x97DD6AD4, 0x5B776A4A, 0x51B26353, 0x9D1863CD, 0x1397642E, 0xDF3D64B0,
                        0x83D02561, 0x4F7A25FF, 0xC1F5221C, 0x0D5F2282, 0x079A2B9B, 0xCB302B05, 0x45BF2CE6, 0x89152C78,
                        0x50353ED4, 0x9C9F3E4A, 0x121039A9, 0xDEBA3937, 0xD47F302E, 0x18D530B0, 0x965A3753, 0x5AF037CD,
                        0xFF6B144A, 0x33C114D4, 0xBD4E1337, 0x71E413A9, 0x7B211AB0, 0xB78B1A2E, 0x39041DCD, 0xF5AE1D53,
                        0x2C8E0FFF, 0xE0240F61, 0x6EAB0882, 0xA201081C, 0xA8C40105, 0x646E019B, 0xEAE10678, 0x264B06E6)

    @staticmethod
    def ComputeCRC(pv):
        """ from [MS-PST]. dwCRC is zero. pv is bytes to CRC. cbLength is length of pv """

        dwCRC = 0
        cbLength = len(pv)
        if cbLength < 4:
            cbRunningLength = 0
        else:
            cbRunningLength = (cbLength//8)*8
        cbEndUnalignedBytes = cbLength - cbRunningLength

        index = 0
        for i in range(1, (cbRunningLength//8) + 1):
            dwCRC ^= struct.unpack('I',pv[index:index+4])[0]
            dwCRC = CRC.CrcTableOffset88[dwCRC & 0x000000FF] ^ CRC.CrcTableOffset80[(dwCRC >> 8) & 0x000000FF] ^ CRC.CrcTableOffset72[(dwCRC >> 16) & 0x000000FF] ^ CRC.CrcTableOffset64[(dwCRC >> 24) & 0x000000FF]
            index += 4

            dw2nd32 = struct.unpack('I',pv[index:index+4])[0]
            dwCRC = dwCRC ^ CRC.CrcTableOffset56[dw2nd32 & 0x000000FF] ^ CRC.CrcTableOffset48[(dw2nd32 >> 8) & 0x000000FF] ^ CRC.CrcTableOffset40[(dw2nd32 >> 16) & 0x000000FF] ^ CRC.CrcTableOffset32[(dw2nd32 >> 24) & 0x000000FF]
            index += 4

        for i in range(1, cbEndUnalignedBytes + 1):
            dwCRC = CRC.CrcTableOffset32[(dwCRC ^ struct.unpack('B',pv[index:index+1])[0]) & 0x000000FF] ^ (dwCRC >> 8)
            index += 1

        return dwCRC


class FieldSize:
    BYTE = 1
    WORD = 2
    DWORD = 4
    ANSIDWORD = 8


class Header:

    def __init__(self, fd):

        # common ansi/unicode fields
        fd.seek(0)
        self.dwMagic = fd.read(FieldSize.DWORD)
        self.dwCRCPartial = fd.read(FieldSize.DWORD) # ignore
        self.wMagicClient = fd.read(FieldSize.WORD)

        try:
            self.wVer, self.wVerClient, self.bPlatformCreate, self.bPlatformAccess = struct.unpack('HHBB',fd.read(FieldSize.WORD+FieldSize.WORD+FieldSize.BYTE+FieldSize.BYTE))
        except struct.error:
            self.validPST = False
            return

        self.dwReserved1 = fd.read(FieldSize.DWORD) # ignore
        self.dwReserved2 = fd.read(FieldSize.DWORD) # ignore

        self.validPST = (self.dwMagic == b'!BDN' and self.wMagicClient == b'SM')
        if not self.validPST:
            return
        self.is_ansi = (self.wVer in (14, 15))
        self.is_unicode = (self.wVer == 23)
        if not (self.is_ansi or self.is_unicode):
            self.validPST = False
            return

        if self.is_ansi:
            self.bidNextB = BID(fd.read(FieldSize.DWORD))
            self.bidNextP = BID(fd.read(FieldSize.DWORD))
            self.dwUnique = fd.read(FieldSize.DWORD)
            self.rgnid = struct.unpack('IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII', fd.read(128))
            self.root = Root(fd.read(40), True)
            self.rgbFM = fd.read(128) # unused
            self.rgbFP = fd.read(128) # unused
            self.bSentinel, self.bCryptMethod = struct.unpack('BB', fd.read(FieldSize.BYTE+FieldSize.BYTE))
            self.rgbReserved = fd.read(FieldSize.WORD) # unused
            self.ullReserved = fd.read(8) # unused
            self.dwReserved = fd.read(FieldSize.DWORD) # unused
            self.rgbReserved2 = fd.read(3) # unused
            self.bReserved = fd.read(1) # unused
            self.rgbReserved3 = fd.read(32) # unused

        if self.is_unicode:
            self.bidUnused = fd.read(FieldSize.ANSIDWORD) # unused
            self.bidNextP = BID(fd.read(FieldSize.ANSIDWORD))
            #self.bidNextB = fd.read(FieldSize.ANSIDWORD) # the spec is wrong, example in appendix is correct
            self.dwUnique = fd.read(FieldSize.DWORD) # ignore
            self.rgnid = struct.unpack('IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII', fd.read(128))
            self.qwUnused = fd.read(FieldSize.ANSIDWORD) # unused
            self.root = Root(fd.read(72), False)
            self.dwAlign = fd.read(FieldSize.DWORD) # unused
            self.rgbFM = fd.read(128) # unused
            self.rgbFP = fd.read(128) # unused
            self.bSentinel, self.bCryptMethod = struct.unpack('BB', fd.read(FieldSize.BYTE+FieldSize.BYTE))
            self.rgbReserved = fd.read(FieldSize.WORD) # unused
            self.bidNextB = BID(fd.read(FieldSize.ANSIDWORD)) # repeated from above in spec
            self.dwCRCFull = fd.read(FieldSize.DWORD) # ignored
            self.rgbReserved2 = fd.read(3) # unused
            self.bReserved = fd.read(1) # unused
            self.rgbReserved3 = fd.read(32) # unused



class Root:

    def __init__(self, bytes, is_ansi):

        if is_ansi: # 40
            self.ibFileEof, self.ibAMapLast, self.cbAMapFree, self.cbPMapFree, self.BREFNBT, self.BREFBBT, self.fAMapValid = \
                struct.unpack('IIII8s8sB', bytes[4:-3])
        else: #unicode #72
            self.ibFileEof, self.ibAMapLast, self.cbAMapFree, self.cbPMapFree, self.BREFNBT, self.BREFBBT, self.fAMapValid = \
                struct.unpack('QQQQ16s16sB', bytes[4:-3])
        self.BREFNBT = BREF(self.BREFNBT)
        self.BREFBBT = BREF(self.BREFBBT)



class PST:

    def __init__(self, pst_file):

        self.fd = open(pst_file,'rb')
        self.header = Header(self.fd)
        if not self.header.validPST:
            raise PSTException('PST file is not a valid PST')

        if self.header.bCryptMethod not in (0,1): # unencoded or NDB_CRYPT_PERMUTE
            raise PSTException('Unsupported encoding/crypt method %s' % self.header.bCryptMethod)

        self.nbd = NBD(self.fd, self.header)
        self.ltp = LTP(self.nbd)
        self.messaging = Messaging(self.ltp)


    def close(self):

        self.fd.close()


    def folder_generator(self):

        root_folder = self.messaging.get_folder(self.messaging.root_entryid, '')
        subfolder_stack = root_folder.subfolders
        yield root_folder

        #Deleted Items should also be in root folder, so don't need to get this one
        #bin_folder = self.messaging.get_folder(self.messaging.deleted_items_entryid, '')
        #subfolder_stack.extend(bin_folder.subfolders)
        #yield bin_folder

        while subfolder_stack:
            subfolder = subfolder_stack.pop()
            try:
                folder = Folder(subfolder.nid, self.ltp, subfolder.parent_path, self.messaging)
                subfolder_stack.extend(folder.subfolders)
                yield folder
            except PSTException as e:
                log_error(e)


    def message_generator(self, folder):

        try:
            for submessage in folder.submessages:
                try:
                    message = Message(submessage.nid, self.ltp, messaging=self.messaging)
                    yield message
                except PSTException as e:
                    log_error(e)
        except GeneratorExit:
            pass
        finally:
            pass


    def export_all_attachments(self, path='', progressbar = None, total_attachments = 0, overwrite=True):
        """dumps all attachments in the PST to a path"""

        attachments_completed = 0
        for folder in self.folder_generator():
            for message in self.message_generator(folder):
                if message.HasAttachments:
                    for subattachment in message.subattachments:
                        attachment = message.get_attachment(subattachment)
                        if len(attachment.data) !=0:
                            filepath = os.path.join(path, attachment.Filename)
                            if overwrite:
                                if os.path.exists(filepath):
                                    os.remove(filepath)
                            else:
                                filepath = get_unused_filename(filepath)
                            write_file(filepath, attachment.data, 'wb')
                        attachments_completed += 1
                        if progressbar:
                            progressbar.update(attachments_completed * 100.0 / total_attachments)


    def export_all_messages(self, path='', progressbar = None, total_messages = 0):

        messages_completed = 0
        for folder in self.folder_generator():
            filepath = get_unused_filename(os.path.join(path, get_safe_filename(folder.path.replace('\\','_'))+'.txt'))
            msg_txt = u''
            for message in self.message_generator(folder):
                msg_txt += u'Subject: %s\nFrom: %s (%s)\n' % (message.Subject, message.SenderName, message.SenderSmtpAddress)
                msg_txt += u'To: %s\n' % ('; '.join([u'%s (%s)' % (subrecipient.DisplayName, subrecipient.EmailAddress) for subrecipient in message.subrecipients]))
                msg_txt += u'Sent: %s\nDelivered: %s\n' % (message.ClientSubmitTime, message.MessageDeliveryTime)
                msg_txt += u'MessageClass: %s\n' % (message.MessageClass)
                if message.HasAttachments:
                    msg_txt += u'Attachments: %s\n' % (u', '.join([subattachment.__repr__() for subattachment in message.subattachments]))
                msg_txt += u'\n%s\n\n\n' % message.Body
            if msg_txt:
                write_file(filepath, unicode2ascii(msg_txt), 'w')
                messages_completed += 1
                if progressbar:
                    progressbar.update(messages_completed * 100.0 / total_messages)


    def get_total_message_count(self):

        total_message_count = 0
        for folder in self.folder_generator():
            total_message_count += len(folder.submessages)
        return total_message_count


    def get_total_attachment_count(self):

        total_attachment_count = 0
        for folder in self.folder_generator():
            for message in self.message_generator(folder):
                if message.HasAttachments:
                    total_attachment_count += len(message.subattachments)
        return total_attachment_count


    def get_pst_status(self):

        status = u'Valid PST: %s, Unicode: %s, CryptMethod: %s, Name: %s, Password: %s' % (self.header.validPST, self.header.is_unicode, self.header.bCryptMethod, self.messaging.message_store.getval(PropIdEnum.PidTagDisplayName), self.messaging.PasswordCRC32Hash)
        return status


    @staticmethod
    def bruteforce(charset, maxlength):

        return (''.join(candidate) for candidate in itertools.chain.from_iterable(itertools.product(charset, repeat=i) for i in range(1, maxlength + 1)))


    @staticmethod
    def crack_password(crc, dictionary_file=''):
        """either does a dictionary attack against the PST password CRC hash, or does a brute force of up to 4 chars"""

        if dictionary_file:
            dic_entries = read_file(dictionary_file).split('\n')
            for password_check in dic_entries:
                crc_check = CRC.ComputeCRC(password_check.strip())
                if crc == crc_check:
                    return password_check
        else: # brute force
            charset = string.ascii_lowercase + string.digits
            for password_length in range(1,5):
                for password_check in PST.bruteforce(charset, password_length):
                    crc_check = CRC.ComputeCRC(password_check)
                    if crc == crc_check:
                        return password_check
        return ''


###################################################################################################################################
#  _   _ _   _ _ _ _           _____                 _   _
# | | | | |_(_) (_) |_ _   _  |  ___|   _ _ __   ___| |_(_) ___  _ __  ___
# | | | | __| | | | __| | | | | |_ | | | | '_ \ / __| __| |/ _ \| '_ \/ __|
# | |_| | |_| | | | |_| |_| | |  _|| |_| | | | | (__| |_| | (_) | | | \__ \
#  \___/ \__|_|_|_|\__|\__, | |_|   \__,_|_| |_|\___|\__|_|\___/|_| |_|___/
#                      |___/
###################################################################################################################################



def hex(i):

    return '0x%x' % i



def size_friendly(size):

    if size < 1024:
        return '%sB' % (size)
    elif size < 1024*1024:
        return '%sKB' % (size//1024)
    elif size < 1024*1024*1024:
        return '%sMB' % (size//(1024*1024))
    else:
        return '%sGB' % (size//(1024*1024*1024))


def unicode2ascii(unicode_str):

    return unicodedata.normalize('NFKD', unicode_str).encode('ascii','ignore')


def write_file(fn, s, write_mode='w'):

    f = open(fn,write_mode)
    f.write(s)
    f.close()


def read_file(fn, open_mode="r"):
    f = open(fn, open_mode)
    s = f.read()
    f.close()
    return s


def get_unused_filename(filepath):
    """ adds numbered suffix to filepath if filename already exists"""

    if os.path.exists(filepath):
        suffix = 1
        while os.path.exists('%s-%s%s' % (os.path.splitext(filepath)[0], suffix, os.path.splitext(filepath)[1])):
            suffix += 1
        filepath = '%s-%s%s' % (os.path.splitext(filepath)[0], suffix, os.path.splitext(filepath)[1])
    return filepath


def get_safe_filename(filename):

    return re.sub(r'[/\\;,><&\*:%=\+@!#\^\(\)|\?]', '', filename)


def set_log(log, stats):
    global LOG, STATS
    LOG, STATS = log, stats

def log_error(e):
    global error_log_list
    error_log_list.append(str(e))
    LOG.error(str(e))
    LOG.error(traceback.format_exc())
    STATS['errors'] += 1
#    sys.stderr.write(e.message+'\n')



###############################################################################################################################
#
#  _____         _     _____                 _   _
# |_   _|__  ___| |_  |  ___|   _ _ __   ___| |_(_) ___  _ __  ___
#   | |/ _ \/ __| __| | |_ | | | | '_ \ / __| __| |/ _ \| '_ \/ __|
#   | |  __/\__ \ |_  |  _|| |_| | | | | (__| |_| | (_) | | | \__ \
#   |_|\___||___/\__| |_|   \__,_|_| |_|\___|\__|_|\___/|_| |_|___/
#
###############################################################################################################################



def test_status_pst(pst_filepath):

    pst = PST(pst_filepath)
    print(unicode2ascii(pst.get_pst_status()))
    print('Total Messages: %s' % pst.get_total_message_count())
    print('Total Attachments: %s' % pst.get_total_attachment_count())
    pst.close()


def get_simple_progressbar(title):

        pbar_widgets = [title, progressbar.Percentage(), ' ', progressbar.Bar(marker = progressbar.RotatingMarker()), ' ', progressbar.ETA()]
        pbar = progressbar.ProgressBar(widgets = pbar_widgets).start()
        return pbar


def test_dump_pst(pst_filepath, output_path):
    """ dump out all PST email attachments and emails (into text files) to output_path folder"""

    pst = PST(pst_filepath)
    print(pst.get_pst_status())

    pbar = get_simple_progressbar('Messages: ')
    total_messages = pst.get_total_message_count()
    pst.export_all_messages(output_path, pbar, total_messages)
    pbar.finish()

    pbar = get_simple_progressbar('Attachments: ')
    total_attachments = pst.get_total_attachment_count()
    pst.export_all_attachments(output_path, pbar, total_attachments)
    pbar.finish()

    pst.close()


def test_folder_psts(psts_folder):

    global error_log_list

    s = ''
    for pst_filepath in [os.path.join(psts_folder, filename) for filename in os.listdir(psts_folder) if os.path.isfile(os.path.join(psts_folder, filename)) and os.path.splitext(filename.lower())[1] == '.pst']:
        try:
            s += 'Opening %s\n' % pst_filepath
            error_log_list = []
            pst = PST(pst_filepath)
            status = unicode2ascii(pst.get_pst_status())
            print(status)
            password = ''
            if pst.messaging.PasswordCRC32Hash:
                password = pst.crack_password(pst.messaging.PasswordCRC32Hash)
                if password:
                    password = ' (%s)' % password
            s += status + password + '\n'
            pst.close()
            s += '\n'.join(error_log_list)
            s += '\n\n\n'
        except Exception as e:
            s += 'ERROR: %s\n' % e

    write_file(os.path.join(psts_folder, 'psts_test.txt'), s)



###################################################################################################################################
#  __  __       _
# |  \/  | __ _(_)_ __
# | |\/| |/ _` | | '_ \
# | |  | | (_| | | | | |
# |_|  |_|\__,_|_|_| |_|
#
###################################################################################################################################


if __name__=="__main__":

    input_pst_file = ''
    output_folder = 'dump'

    arg_parser = argparse.ArgumentParser(prog='pst', description='PST: parses PST files. Can dump emails and attachments.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    arg_parser.add_argument('-i', dest='input_pst_file', default=input_pst_file, help='input PST file to dump')
    arg_parser.add_argument('-o', dest='output_folder', default=output_folder, help='output folder')
    arg_parser.add_argument('-t', dest='debug', help=argparse.SUPPRESS, action='store_true', default=False) # hidden argument

    args = arg_parser.parse_args()

    if not args.debug:

        input_pst_file = args.input_pst_file
        output_folder = args.output_folder

        if not os.path.exists(input_pst_file):
            print('Input PST file does not exist')
            sys.exit(1)

        if not os.path.exists(output_folder):
            print('Output folder does not exist')
            sys.exit(1)

        test_dump_pst(input_pst_file,output_folder)

    else: # debug

        pass
        #test_folder = 'D:\\'
        #test_status_pst(test_folder+'sample.pst')
        #test_dump_pst(test_folder+'sample.pst', test_folder+'dump')
        #test_folder_psts(test_folder)
