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me_unpack.py
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me_unpack.py
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#!/usr/bin/env python
# Intel ME ROM image dumper/extractor
# Copyright (c) 2012-2014 Igor Skochinsky
# Version 0.1 2012-10-10
# Version 0.2 2013-08-15
# Version 0.3 2014-10-06
#
# This software is provided 'as-is', without any express or implied
# warranty. In no event will the authors be held liable for any damages
# arising from the use of this software.
#
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
#
# 1. The origin of this software must not be misrepresented; you must not
# claim that you wrote the original software. If you use this software
# in a product, an acknowledgment in the product documentation would be
# appreciated but is not required.
#
# 2. Altered source versions must be plainly marked as such, and must not be
# misrepresented as being the original software.
#
# 3. This notice may not be removed or altered from any source
# distribution.
import ctypes
import struct
import sys
import os
import array
uint8_t = ctypes.c_ubyte
char = ctypes.c_char
uint32_t = ctypes.c_uint
uint64_t = ctypes.c_uint64
uint16_t = ctypes.c_ushort
def replace_bad(value, deletechars):
for c in deletechars:
value = value.replace(c,'_')
return value
def read_struct(li, struct):
s = struct()
slen = ctypes.sizeof(s)
bytes = li.read(slen)
fit = min(len(bytes), slen)
ctypes.memmove(ctypes.addressof(s), bytes, fit)
return s
def get_struct(str_, off, struct):
s = struct()
slen = ctypes.sizeof(s)
bytes = str_[off:off+slen]
fit = min(len(bytes), slen)
if fit < slen:
raise Exception("can't read struct: %d bytes available but %d required" % (fit, slen))
ctypes.memmove(ctypes.addressof(s), bytes, fit)
return s
def DwordAt(f, off):
return struct.unpack("<I", f[off:off+4])[0]
def hexdump(s):
if isinstance(s, str):
s = map(ord, s)
return " ".join("%02X" % v for v in s)
class MeModuleHeader1(ctypes.LittleEndianStructure):
_fields_ = [
("Tag", char*4), # $MME
("Guid", uint8_t*16), #
("MajorVersion", uint16_t), #
("MinorVersion", uint16_t), #
("HotfixVersion", uint16_t), #
("BuildVersion", uint16_t), #
("Name", char*16), #
("Hash", uint8_t*20), #
("Size", uint32_t), #
("Flags", uint32_t), #
("Unk48", uint32_t), #
("Unk4C", uint32_t), #
]
def __init__(self):
self.Offset = None
def comptype(self):
return COMP_TYPE_NOT_COMPRESSED
def print_flags(self):
print " Disable Hash: %d" % ((self.Flags>>0)&1)
print " Optional: %d" % ((self.Flags>>1)&1)
if self.Flags >> 2:
print " Unknown B2_31: %d" % ((self.Flags>>2))
def pprint(self):
print "Header tag: %s" % (self.Tag)
nm = self.Name.rstrip('\0')
print "Module name: %s" % (nm)
print "Guid: %s" % (hexdump(self.Guid))
print "Version: %d.%d.%d.%d" % (self.MajorVersion, self.MinorVersion, self.HotfixVersion, self.BuildVersion)
print "Hash: %s" % (hexdump(self.Hash))
print "Size: 0x%08X" % (self.Size)
if self.Offset != None:
print "(Offset): 0x%08X" % (self.Offset)
print "Flags: 0x%08X" % (self.Flags)
self.print_flags()
print "Unk48: 0x%08X" % (self.Unk48)
print "Unk4C: 0x%08X" % (self.Unk4C)
def print_map(self):
nm = self.Name.rstrip('\0').ljust(16, ' ')
base = self.ModBase
codestart = base
codeend = base + self.CodeSize
dataend = base + self.MemorySize
curoff = base
if codestart:
if curoff < codestart:
print "%08X %08X %s GAP" % (curoff, codestart, nm)
curoff = codestart
print "%08X %08X %s CODE" % (curoff, codeend, nm)
curoff = codeend
if curoff < dataend:
print "%08X %08X %s DATA" % (curoff, dataend, nm)
curoff = dataend
if curoff & 0xFFF:
gapend = (curoff + 0xFFF) & ~0xFFF
print "%08X %08X %s GAP" % (curoff, gapend, nm)
curoff = gapend
class MeModuleFileHeader1(ctypes.LittleEndianStructure):
_fields_ = [
("Tag", char*4), # $MOD
("Unk04", uint32_t), #
("Unk08", uint32_t), #
("MajorVersion", uint16_t), #
("MinorVersion", uint16_t), #
("HotfixVersion", uint16_t), #
("BuildVersion", uint16_t), #
("Unk14", uint32_t), #
("CompressedSize", uint32_t), #
("UncompressedSize", uint32_t), #
("LoadAddress", uint32_t), #
("MappedSize", uint32_t), #
("EntryRVA", uint32_t), #
("Unk2C", uint32_t), #
("Name", char*16), #
("Guid", uint8_t*16), #
]
def pprint(self):
print "Module tag: %s" % (self.Tag)
nm = self.Name.rstrip('\0')
print "Module name: %s" % (nm)
print "Guid: %s" % (hexdump(self.Guid))
print "Version: %d.%d.%d.%d" % (self.MajorVersion, self.MinorVersion, self.HotfixVersion, self.BuildVersion)
print "Unk04: 0x%08X" % (self.Unk04)
print "Unk08: 0x%08X" % (self.Unk08)
print "Unk14: 0x%08X" % (self.Unk14)
print "Compressed size: 0x%08X" % (self.CompressedSize)
print "Uncompressed size: 0x%08X" % (self.UncompressedSize)
print "Mapped address: 0x%08X" % (self.LoadAddress)
print "Mapped size: 0x%08X" % (self.MappedSize)
print "Entrypoint RVA: 0x%08X (VA=%08X)" % (self.EntryRVA, self.EntryRVA+self.LoadAddress)
print "Unk2C: 0x%08X" % (self.Unk2C)
MeModulePowerTypes = ["POWER_TYPE_RESERVED", "POWER_TYPE_M0_ONLY", "POWER_TYPE_M3_ONLY", "POWER_TYPE_LIVE"]
MeCompressionTypes = ["COMP_TYPE_NOT_COMPRESSED", "COMP_TYPE_HUFFMAN", "COMP_TYPE_LZMA", "<unknown>"]
COMP_TYPE_NOT_COMPRESSED = 0
COMP_TYPE_HUFFMAN = 1
COMP_TYPE_LZMA = 2
MeModuleTypes = ["DEFAULT", "PRE_ME_KERNEL", "VENOM_TPM", "APPS_QST_DT", "APPS_AMT", "TEST"]
MeApiTypes = ["API_TYPE_DATA", "API_TYPE_ROMAPI", "API_TYPE_KERNEL", "<unknown>"]
class MeModuleHeader2(ctypes.LittleEndianStructure):
_fields_ = [
("Tag", char*4), # $MME
("Name", char*16), # 4
("Hash", uint8_t*32), # 0x14
("ModBase", uint32_t), # 0x34
("Offset", uint32_t), # 0x38 From the start of manifest
("CodeSize", uint32_t), # 0x3C
("Size", uint32_t), # 0x40
("MemorySize", uint32_t), # 0x44
("PreUmaSize", uint32_t), # 0x48
("EntryPoint", uint32_t), # 0x4C
("Flags", uint32_t), # 0x50
("Unk54", uint32_t), #
("Unk58", uint32_t), #
("Unk5C", uint32_t), #
]
def comptype(self):
return (self.Flags>>4)&7
def print_flags(self):
print " LoadState: %d" % ((self.Flags>>0)&1)
powtype = (self.Flags>>1)&3
print " Power Type: %s (%d)" % (MeModulePowerTypes[powtype], powtype)
print " UMA Dependency: %d" % ((self.Flags>>3)&1)
comptype = (self.Flags>>4)&7
print " Compression: %s (%d)" % (MeCompressionTypes[comptype], comptype)
modstage = (self.Flags>>7)&0xF
if modstage < len(MeModuleTypes):
smtype = MeModuleTypes[modstage]
else:
smtype = "STAGE %X" % modstage
print " Load Stage: %s (%d)" % (smtype, modstage)
apitype = (self.Flags>>11)&7
print " API Type: %s (%d)" % (MeApiTypes[apitype], apitype)
print " Load: %d" % ((self.Flags>>14)&1)
print " Initialize: %d" % ((self.Flags>>15)&1)
print " Privileged: %d" % ((self.Flags>>16)&1)
print " Alias1 Pages (RAPI): %d" % ((self.Flags>>17)&7)
print " Alias2 Pages (KAPI): %d" % ((self.Flags>>20)&3)
print " Pre-UMA Load: %d" % ((self.Flags>>22)&1)
if self.Flags >> 23:
print " Unknown B23_31: %d" % ((self.Flags>>23))
def pprint(self):
print "Header tag: %s" % (self.Tag)
nm = self.Name.rstrip('\0')
print "Module name: %s" % (nm)
print "Hash: %s" % (hexdump(self.Hash))
print "Module base: 0x%08X" % (self.ModBase)
print "Offset: 0x%08X" % (self.Offset)
print "Code size: 0x%08X" % (self.CodeSize)
print "Data length: 0x%08X" % (self.Size)
print "Memory size: 0x%08X" % (self.MemorySize)
print "Pre-UMA size: 0x%08X" % (self.PreUmaSize)
print "Entry point: 0x%08X" % (self.EntryPoint)
print "Flags: 0x%08X" % (self.Flags)
self.print_flags()
print "Unk54: 0x%08X" % (self.Unk54)
print "Unk58: 0x%08X" % (self.Unk58)
print "Unk5C: 0x%08X" % (self.Unk5C)
def print_map(self):
nm = self.Name.rstrip('\0').ljust(16, ' ')
base = self.ModBase
rapi1 = ((self.Flags>>17)&7)
rapi2 = ((self.Flags>>20)&3)
codestart = base + (rapi1+rapi2) * 0x1000
codeend = base + self.CodeSize
dataend = base + self.MemorySize
curoff = base
if rapi1:
rapi1end = curoff + rapi1 * 0x1000
print "%08X %08X %s RAPI" % (curoff, rapi1end, nm)
curoff = rapi1end
if rapi2:
rapi2end = curoff + rapi2 * 0x1000
print "%08X %08X %s KAPI" % (curoff, rapi2end, nm)
curoff = rapi2end
if self.PreUmaSize == 0:
codestart = base
if codestart:
if curoff < codestart:
print "%08X %08X %s GAP" % (curoff, codestart, nm)
curoff = codestart
print "%08X %08X %s CODE" % (curoff, codeend, nm)
curoff = codeend
if curoff < dataend:
print "%08X %08X %s DATA" % (curoff, dataend, nm)
curoff = dataend
if curoff & 0xFFF:
gapend = (curoff + 0xFFF) & ~0xFFF
print "%08X %08X %s GAP" % (curoff, gapend, nm)
curoff = gapend
def extract_code_mods(nm, f, soff):
try:
os.mkdir(nm)
except:
pass
os.chdir(nm)
print " extracting CODE partition %s" % (nm)
if f[soff:soff+4]=='$CPD':
s= CPDHeader
else:
s= MeManifestHeader
manif = get_struct(f, soff, s)
manif.parse_mods(f, soff)
manif.pprint()
manif.extract(f, soff)
os.chdir("..")
def decomp_lzma(compdata):
if os.name == "posix":
import subprocess
elif os.name == "nt":
import subprocess, _subprocess
else:
import subprocess, _subprocess
if os.name == "nt":
# hide the console window
si = subprocess.STARTUPINFO()
si.dwFlags |= _subprocess.STARTF_USESHOWWINDOW
if in_ida:
basedir = idaapi.idadir("loaders")
else:
basedir = os.path.dirname(__file__)
path = os.path.join(basedir, "lzma")
print "using decompressor at '%s'" % path
try:
process = subprocess.Popen([path, "d", "-si", "-so"], startupinfo=si, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output, errout = process.communicate(compdata)
retcode = process.poll()
except IOError as e:
print "error %d running lzma!\nstderr output:\n%s" % (e.errno, errout)
return None
except OSError as e:
print "Error running lzma.exe (error %d: %s)" % (e.errno, e.strerror)
return None
except:
print "Error running lzma.exe"
return None
if retcode:
return None
return output
class MeManifestHeader(ctypes.LittleEndianStructure):
_fields_ = [
("ModuleType", uint16_t), # 00
("ModuleSubType", uint16_t), # 02
("HeaderLen", uint32_t), # 04 in dwords
("HeaderVersion", uint32_t), # 08
("Flags", uint32_t), # 0C 0x80000000 = Debug
("ModuleVendor", uint32_t), # 10
("Date", uint32_t), # 14 BCD yyyy.mm.dd
("Size", uint32_t), # 18 in dwords
("Tag", char*4), # 1C $MAN or $MN2
("NumModules", uint32_t), # 20
("MajorVersion", uint16_t), # 24
("MinorVersion", uint16_t), # 26
("HotfixVersion", uint16_t), # 28
("BuildVersion", uint16_t), # 2A
("Unknown1", uint32_t*19), # 2C
("KeySize", uint32_t), # 78
("ScratchSize", uint32_t), # 7C
("RsaPubKey", uint32_t*64), # 80
("RsaPubExp", uint32_t), # 180
("RsaSig", uint32_t*64), # 184
("PartitionName", char*12), # 284
# 290
]
def parse_mods(self, f, offset):
self.modules = []
self.updparts = []
orig_off = offset
offset += self.HeaderLen*4
offset += 12
if self.Tag == '$MN2':
self.cpu = "ARCompact"
htype = MeModuleHeader2
hdrlen = ctypes.sizeof(htype)
if self.NumModules > 1:
# check for TXE
if f[offset+hdrlen:offset+hdrlen+4] != '$MME':
hdrlen = 0x80
if f[offset+hdrlen:offset+hdrlen+4] == '$MME':
print "TXE firmware detected"
self.cpu = "SPARC"
else:
raise Exception("Could not determine module header length!")
udc_fmt = "<4s32s16sII"
udc_len = 0x3C
elif self.Tag == '$MAN':
self.cpu = "ARC"
htype = MeModuleHeader1
hdrlen = ctypes.sizeof(htype)
udc_fmt = "<4s20s16sII"
udc_len = 0x30
else:
print ("Don't know how to parse modules for manifest tag %s!" % self.Tag)
self.huff_start =0
self.huff_end =0
return
raise Exception("Don't know how to parse modules for manifest tag %s!" % self.Tag)
modmap = {}
self.huff_start = 0
for i in range(self.NumModules):
mod = get_struct(f, offset, htype)
if not mod.Tag in ['$MME', '$MDL']:
raise Exception("Bad module tag (%s) at offset %08X!" % (mod.Tag, offset))
nm = mod.Name.rstrip('\0')
modmap[nm] = mod
self.modules.append(mod)
if mod.comptype() == COMP_TYPE_HUFFMAN:
if self.huff_start and self.huff_start != mod.Offset:
print "Warning: inconsistent start offset for Huffman modules!"
self.huff_start = mod.Offset
offset += hdrlen
self.partition_end = None
hdr_end = orig_off + self.Size*4
while offset < hdr_end:
# print "tags %08X" % offset
hdr = f[offset:offset+8]
if hdr == '\xFF' * 8:
offset += hdrlen
continue
if len(hdr) < 8 or hdr[0] != '$':
break
tag, elen = hdr[:4], struct.unpack("<I", hdr[4:])[0]
if elen == 0:
break
print "Tag: %s, data length: %08X (0x%08X bytes)" % (tag, elen, elen*4)
if tag == '$UDC':
subtag, hash, subname, suboff, size = struct.unpack(udc_fmt, f[offset+8:offset+8+udc_len])
suboff += offset
print "Update code part: %s, %s, offset %08X, size %08X" % (subtag, subname.rstrip('\0'), suboff, size)
self.updparts.append((subtag, suboff, size))
elif tag == '$GLT':
suboff, size = struct.unpack("<II", f[offset+8:offset+16])
print "GLUT part: offset +%08X, size %08X" % (suboff, size)
self.updparts.append(('GLUT', offset+suboff, size))
elif elen == 3:
val = struct.unpack("<I", f[offset+8:offset+12])[0]
print "%s: %08X" % (tag[1:], val)
elif elen == 4:
vals = struct.unpack("<II", f[offset+8:offset+16])
print "%s: %08X %08X" % (tag[1:], vals[0], vals[1])
else:
vals = array.array("I", f[offset+8:offset+elen*4])
print "%s: %s" % (tag[1:], " ".join("%08X" % v for v in vals))
if tag == '$MCP':
self.partition_end = vals[0] + vals[1]
offset += elen*4
offset = hdr_end
while True:
print "mods %08X" % offset
if f[offset:offset+4] != '$MOD':
break
mfhdr = get_struct(f, offset, MeModuleFileHeader1)
mfhdr.pprint()
nm = mfhdr.Name.rstrip('\0')
mod = modmap[nm]
# copy some fields needed by other code
mod.Offset = offset - orig_off
mod.UncompressedSize = mfhdr.UncompressedSize
mod.ModBase = mfhdr.LoadAddress
mod.CodeSize = mfhdr.UncompressedSize
mod.MemorySize = mfhdr.MappedSize
mod.PreUmaSize = mod.MemorySize
mod.EntryPoint = mod.ModBase + mfhdr.EntryRVA
offset += mod.Size
# check for huffman LUT
offset = self.huff_start
if f[offset+1:offset+4] == 'LUT':
cnt, unk8, unkc, complen = struct.unpack("<IIII", f[offset+4:offset+20])
self.huff_end = offset + 0x40 + 4*cnt + complen
else:
self.huff_start = 0xFFFFFFFF
self.huff_end = 0xFFFFFFFF
def print_mods(self):
pname = self.PartitionName.rstrip('\0')
print "------%s------" % pname
for i, mod in enumerate(self.modules):
if i: print "--"
mod.print_map()
print "------End-------\n"
for subtag, soff, subsize in self.updparts:
if subtag != 'GLUT':
manif = get_struct(f, soff, MeManifestHeader)
manif.parse_mods(f, soff)
manif.print_mods()
def _get_mod_data(self, f, offset, imod):
huff_end = self.huff_end
nhuffs = 0
for mod in self.modules:
if mod.comptype() != COMP_TYPE_HUFFMAN:
huff_end = min(huff_end, mod.Offset)
else:
nhuffs += 1
mod = self.modules[imod]
nm = mod.Name.rstrip('\0')
islast = (imod == len(self.modules)-1)
if mod.Offset in [0xFFFFFFFF, 0] or (mod.Size in [0xFFFFFFFF, 0] and not islast and mod.comptype() != COMP_TYPE_HUFFMAN):
return None
else:
soff = offset + mod.Offset
size = mod.Size
data = f[soff:soff+size]
if mod.comptype() == COMP_TYPE_LZMA:
ext = "lzma"
if data.startswith("\x36\x00\x40\x00\x00") and data[0xE:0x11] == '\x00\x00\x00':
# delete the extra zeroes so the stream can be decompressed
data = data[:0xE] + data[0x11:]
ud = decomp_lzma(data)
if ud:
data = ud
ext = "bin"
elif mod.comptype() == COMP_TYPE_HUFFMAN:
ext = "huff"
if nhuffs != 1:
nm = self.PartitionName
size = huff_end - mod.Offset
else:
ext = "bin"
if self.Tag == '$MAN':
ext = "mod"
moff = soff+0x50
if f[moff:moff+5] == '\x5D\x00\x00\x80\x00':
data = f[moff:moff+5] + struct.pack("<Q", mod.UncompressedSize) + f[moff+5:moff+mod.Size-0x50]
# file("%s_comp.lzma" % nm, "wb").write(data)
ud = decomp_lzma(data)
if ud:
data = f[soff:soff+0x50] + ud
ext = "bin"
return (data, ext)
def extract(self, f, offset):
huff_end = self.huff_end
nhuffs = 0
for mod in self.modules:
if mod.comptype() != COMP_TYPE_HUFFMAN:
huff_end = min(huff_end, mod.Offset)
else:
print "Huffman module: %r %08X/%08X" % (mod.Name.rstrip('\0'), mod.ModBase, mod.CodeSize)
nhuffs += 1
for imod, mod in enumerate(self.modules):
mod = self.modules[imod]
nm = mod.Name.rstrip('\0')
islast = (imod == len(self.modules)-1)
# print "Module: %r %08X/%08X" % (nm, mod.ModBase, mod.CodeSize),
print "Module: %r" % (nm),
r = self._get_mod_data(f, offset, imod)
if r:
data, ext = r
if ext == "huff" and nhuffs != 1:
nm = self.PartitionName
if ext!= "bin":
fname = "%s_mod.%s" % (nm, ext)
else:
fname = nm
print " => %s" % (fname)
open(fname, "wb").write(data)
for subtag, soff, subsize in self.updparts:
fname = "%s_udc.bin" % subtag
print "Update part: %r %08X/%08X" % (subtag, soff, subsize),
print " => %s" % (fname)
open(fname, "wb").write(f[soff:soff+subsize])
if subtag != 'GLUT':
extract_code_mods(subtag, f, soff)
def pprint(self):
print "Module Type: %d, Subtype: %d" % (self.ModuleType, self.ModuleSubType)
print "Header Length: 0x%02X (0x%X bytes)" % (self.HeaderLen, self.HeaderLen*4)
print "Header Version: %d.%d" % (self.HeaderVersion>>16, self.HeaderVersion&0xFFFF)
print "Flags: 0x%08X" % (self.Flags),
print " [%s signed] [%s flag]" % (["production","debug"][(self.Flags>>31)&1], ["production","pre-production"][(self.Flags>>30)&1])
print "Module Vendor: 0x%04X" % (self.ModuleVendor)
print "Date: %08X" % (self.Date)
print "Total Manifest Size: 0x%02X (0x%X bytes)" % (self.Size, self.Size*4)
print "Tag: %s" % (self.Tag)
print "Number of modules: %d" % (self.NumModules)
print "Version: %d.%d.%d.%d" % (self.MajorVersion, self.MinorVersion, self.HotfixVersion, self.BuildVersion)
print "Unknown data 1: %s" % ([n for n in self.Unknown1])
print "Key size: 0x%02X (0x%X bytes)" % (self.KeySize, self.KeySize*4)
print "Scratch size: 0x%02X (0x%X bytes)" % (self.ScratchSize, self.ScratchSize*4)
print "RSA Public Key: [skipped]"
print "RSA Public Exponent: %d" % (self.RsaPubExp)
print "RSA Signature: [skipped]"
pname = self.PartitionName.rstrip('\0')
if not pname:
pname = "(none)"
print "Partition name: %s" % (pname)
print "---Modules---"
for mod in self.modules:
mod.pprint()
print
print "------End-------"
class CPDEntry(ctypes.LittleEndianStructure):
_fields_ = [
("Name", char*12), # 00
("Offset", uint32_t), # 04
("Size", uint32_t), # 08
("Flags", uint32_t), #0C
# 10
]
def comptype(self):
nm = self.Name.rstrip('\0')
typ = self.Offset>>24
self.ModBase =0
self.CodeSize =0
if nm[-4:-3]=='.': return COMP_TYPE_NOT_COMPRESSED
if typ==2: return COMP_TYPE_HUFFMAN
elif typ==0: return COMP_TYPE_LZMA
else: return COMP_TYPE_NOT_COMPRESSED
def pprint(self):
nm = self.Name.rstrip('\0')
print "Module name: %s" % (nm)
typ = self.Offset>>28
print "Offset: %08X" % (self.Offset & 0xFFFFFF)
print "Compress flag: %08X" % ((self.Offset >>25) &1)
print "Size: %08X" % (self.Size)
print "comp type:%d" %self.comptype()
print "Flags: %08X"% (self.Flags)
class CPDHeader(ctypes.LittleEndianStructure):
_fields_ = [
("Tag", char*4), # 00 $CPD
("NumModules", uint32_t), # 04
("HeaderVersion",uint8_t), # 08
("EntryVersion", uint8_t), # 09
("HeaderLength", uint8_t), # 0A
("Checksum", uint8_t), # 0B
("PartitionName", char*4), #0C
# 10
]
def parse_mods(self, f, offset):
self.modules = []
self.updparts = []
orig_off = offset
offset += 0x10
if self.Tag == '$MN2':
self.cpu = "ARCompact"
htype = MeModuleHeader2
hdrlen = ctypes.sizeof(htype)
udc_fmt = "<4s32s16sII"
udc_len = 0x3C
elif self.Tag == '$MAN':
self.cpu = "ARC"
htype = MeModuleHeader1
hdrlen = ctypes.sizeof(htype)
udc_fmt = "<4s20s16sII"
udc_len = 0x30
elif self.Tag == '$CPD':
self.cpu = "metapc"
htype = CPDEntry
hdrlen = ctypes.sizeof(htype)
udc_fmt = "<4s20s16sII"
udc_len = 0x30
else:
print ("Don't know how to parse modules for manifest tag %r!" % self.Tag)
self.huff_start =0
self.huff_end =0
return
raise Exception("Don't know how to parse modules for manifest tag %s!" % self.Tag)
modmap = {}
self.huff_start = 0
for i in range(self.NumModules):
mod = get_struct(f, offset, htype)
nm = mod.Name.rstrip('\0')
modmap[nm] = mod
self.modules.append(mod)
if mod.comptype() == COMP_TYPE_HUFFMAN:
if self.huff_start and self.huff_start != mod.Offset:
print "Warning: inconsistent start offset for Huffman modules!"
self.huff_start = mod.Offset
offset += hdrlen
self.partition_end = None
hdr_end = offset
while offset < hdr_end:
# print "tags %08X" % offset
hdr = f[offset:offset+8]
if hdr == '\xFF' * 8:
offset += hdrlen
continue
if len(hdr) < 8 or hdr[0] != '$':
break
tag, elen = hdr[:4], struct.unpack("<I", hdr[4:])[0]
if elen == 0:
break
print "Tag: %s, data length: %08X (0x%08X bytes)" % (tag, elen, elen*4)
if tag == '$UDC':
subtag, hash, subname, suboff, size = struct.unpack(udc_fmt, f[offset+8:offset+8+udc_len])
suboff += offset
print "Update code part: %s, %s, offset %08X, size %08X" % (subtag, subname.rstrip('\0'), suboff, size)
self.updparts.append((subtag, suboff, size))
elif tag == '$GLT':
suboff, size = struct.unpack("<II", f[offset+8:offset+16])
print "GLUT part: offset +%08X, size %08X" % (suboff, size)
self.updparts.append(('GLUT', offset+suboff, size))
elif elen == 3:
val = struct.unpack("<I", f[offset+8:offset+12])[0]
print "%s: %08X" % (tag[1:], val)
elif elen == 4:
vals = struct.unpack("<II", f[offset+8:offset+16])
print "%s: %08X %08X" % (tag[1:], vals[0], vals[1])
else:
vals = array.array("I", f[offset+8:offset+elen*4])
print "%s: %s" % (tag[1:], " ".join("%08X" % v for v in vals))
if tag == '$MCP':
self.partition_end = vals[0] + vals[1]
offset += elen*4
offset = hdr_end
while True:
print "mods %08X" % offset
if f[offset:offset+4] != '$MOD':
break
mfhdr = get_struct(f, offset, MeModuleFileHeader1)
mfhdr.pprint()
nm = mfhdr.Name.rstrip('\0')
mod = modmap[nm]
# copy some fields needed by other code
mod.Offset = offset - orig_off
mod.UncompressedSize = mfhdr.UncompressedSize
mod.ModBase = mfhdr.LoadAddress
mod.CodeSize = mfhdr.UncompressedSize
mod.MemorySize = mfhdr.MappedSize
mod.PreUmaSize = mod.MemorySize
mod.EntryPoint = mod.ModBase + mfhdr.EntryRVA
offset += mod.Size
# check for huffman LUT
offset = self.huff_start
if f[offset+1:offset+4] == 'LUT':
cnt, unk8, unkc, complen = struct.unpack("<IIII", f[offset+4:offset+20])
self.huff_end = offset + 0x40 + 4*cnt + complen
else:
self.huff_start = 0xFFFFFFFF
self.huff_end = 0xFFFFFFFF
def print_mods(self):
pname = self.PartitionName.rstrip('\0')
print "------%s------" % pname
for i, mod in enumerate(self.modules):
if i: print "--"
mod.print_map()
print "------End-------\n"
for subtag, soff, subsize in self.updparts:
if subtag != 'GLUT':
manif = get_struct(f, soff, MeManifestHeader)
manif.parse_mods(f, soff)
manif.print_mods()
def _get_mod_data(self, f, offset, imod):
huff_end = self.huff_end
nhuffs = 0
for mod in self.modules:
if mod.comptype() != COMP_TYPE_HUFFMAN:
huff_end = min(huff_end, mod.Offset)
else:
nhuffs += 1
mod = self.modules[imod]
nm = mod.Name.rstrip('\0')
islast = (imod == len(self.modules)-1)
if mod.Offset in [0xFFFFFFFF, 0] or (mod.Size in [0xFFFFFFFF, 0] and not islast and mod.comptype() != COMP_TYPE_HUFFMAN):
return None
else:
if self.Tag == '$CPD':
soff = offset + mod.Offset & 0xFFFFFF
else:
soff = offset + mod.Offset
size = mod.Size
data = f[soff:soff+size]
if mod.comptype() == COMP_TYPE_LZMA and nm[-4:-3] !='.':
ext = "lzma"
if data.startswith("\x36\x00\x40\x00\x00") and data[0xE:0x11] == '\x00\x00\x00':
# delete the extra zeroes so the stream can be decompressed
data = data[:0xE] + data[0x11:]
ud = decomp_lzma(data)
if ud:
data = ud
ext = "bin"
elif mod.comptype() == COMP_TYPE_HUFFMAN:
ext = "huff"
if nhuffs != 1:
nm = self.PartitionName
size = huff_end - mod.Offset
else:
ext = "bin"
if self.Tag == '$MAN':
ext = "mod"
moff = soff+0x50
if f[moff:moff+5] == '\x5D\x00\x00\x80\x00':
data = f[moff:moff+5] + struct.pack("<Q", mod.UncompressedSize) + f[moff+5:moff+mod.Size-0x50]
# file("%s_comp.lzma" % nm, "wb").write(data)
ud = decomp_lzma(data)
if ud:
data = f[soff:soff+0x50] + ud
ext = "bin"
return (data, ext)
def extract(self, f, offset):
huff_end = self.huff_end
nhuffs = 0
for mod in self.modules:
if mod.comptype() != COMP_TYPE_HUFFMAN:
huff_end = min(huff_end, mod.Offset)
else:
print "Huffman module: %r %08X/%08X" % (mod.Name.rstrip('\0'), mod.ModBase, mod.CodeSize)
nhuffs += 1
for imod, mod in enumerate(self.modules):
mod = self.modules[imod]
nm = mod.Name.rstrip('\0')
islast = (imod == len(self.modules)-1)
# print "Module: %r %08X/%08X" % (nm, mod.ModBase, mod.CodeSize),
print "Module: %r" % (nm),
r = self._get_mod_data(f, offset, imod)
if r:
data, ext = r
if ext == "huff" and nhuffs != 1:
nm = self.PartitionName
if ext != "bin":
fname = "%s_mod.%s" % (nm, ext)
else:
fname = nm
print " => %s" % (fname)
open(fname, "wb").write(data)
for subtag, soff, subsize in self.updparts:
fname = "%s_udc.bin" % subtag
print "Update part: %r %08X/%08X" % (subtag, soff, subsize),
print " => %s" % (fname)
open(fname, "wb").write(f[soff:soff+subsize])
if subtag != 'GLUT':
extract_code_mods(subtag, f, soff)
def pprint(self):
print "Tag: %s" % (self.Tag)
print "Number of modules: %d" % (self.NumModules)
print "Header Version: %0X" % (self.HeaderVersion)
print "Entry Version: %02X" % (self.EntryVersion)
print "Header Length: %02X" % (self.HeaderLength)
print "Checksum: %02X" % (self.Checksum)
pname = self.PartitionName.rstrip('\0')
if not pname:
pname = "(none)"
print "Partition name: %s" % (pname)
print "---Modules---"
for mod in self.modules:
mod.pprint()
print
print "------End-------"
PartTypes = ["Code", "BlockIo", "Nvram", "Generic", "Effs", "Rom"]
PT_CODE = 0
PT_BLOCKIO = 1
PT_NVRAM = 2
PT_GENERIC = 3
PT_EFFS = 4
PT_ROM = 5
class MeFptEntry(ctypes.LittleEndianStructure):
_fields_ = [
("Name", char*4), # 00 partition name
("Owner", char*4), # 04 partition owner?
("Offset", uint32_t), # 08 from the start of FPT, or 0
("Size", uint32_t), # 0C
("TokensOnStart", uint32_t), # 10
("MaxTokens", uint32_t), # 14
("ScratchSectors", uint32_t), # 18
("Flags", uint32_t), # 1C
]
#def __init__(self, f, offset):
#self.sig1, self.Owner, self.Offset, self.Size = struct.unpack("<4s4sII", f[offset:offset+0x10])
#self.TokensOnStart, self.MaxTokens, self.ScratchSectors, self.Flags = struct.unpack("<IIII", f[offset+0x10:offset+0x20])
def ptype(self):
return self.Flags & 0x7F
def print_flags(self):
pt = self.ptype()
if pt < len(PartTypes):
stype = "%d (%s)" % (pt, PartTypes[pt])
else:
stype = "%d" % pt
print " Type: %s" % stype
print " DirectAccess: %d" % ((self.Flags>>7)&1)
print " Read: %d" % ((self.Flags>>8)&1)
print " Write: %d" % ((self.Flags>>9)&1)
print " Execute: %d" % ((self.Flags>>10)&1)
print " Logical: %d" % ((self.Flags>>11)&1)
print " WOPDisable: %d" % ((self.Flags>>12)&1)
print " ExclBlockUse: %d" % ((self.Flags>>13)&1)
def pprint(self):
print "Partition: %r" % self.Name
print "Owner: %s" % [repr(self.Owner), "(none)"][self.Owner == '\xFF\xFF\xFF\xFF']
print "Offset/size: %08X/%08X" % (self.Offset, self.Size)
print "TokensOnStart: %08X" % (self.TokensOnStart)
print "MaxTokens: %08X" % (self.MaxTokens)
print "ScratchSectors: %08X" % (self.ScratchSectors)
print "Flags: %04X" % self.Flags
self.print_flags()
class MeFptTable:
def __init__(self, f, offset):
hdr = f[offset:offset+0x30]
if hdr[0x10:0x14] == '$FPT':
self.rombjump = hdr[:0x10]
base = offset + 0x10
elif hdr[0:4] == '$FPT':
base = offset
self.rombjump = None
else:
raise Exception("FPT format not recognized")
num_entries = DwordAt(f, base+4)
self.BCDVer, self.FPTEntryType, self.HeaderLen, self.Checksum = struct.unpack("<BBBB", f[base+8:base+12])
self.FlashCycleLifetime, self.FlashCycleLimit, self.UMASize = struct.unpack("<HHI", f[base+12:base+20])
x = struct.unpack("<I4H", f[base+20:base+32])
self.Flags, self.ExtraVer = x[0], x[1:5]
offset = base + 0x20
self.parts = []
for i in range(num_entries):
part = get_struct(f, offset, MeFptEntry) #MeFptEntry(f, offset)
offset += 0x20
self.parts.append(part)
def extract(self, f, offset):
for ipart in range(len(self.parts)):
part = self.parts[ipart]
print "Partition: %r %08X/%08X" % (part.Name, part.Offset, part.Size),
islast = (ipart == len(self.parts)-1)
if part.Offset in [0xFFFFFFFF, 0] or (part.Size in [0xFFFFFFFF, 0] and not islast):
print " (skipping)"
else:
nm = part.Name.rstrip('\0')
soff = offset + part.Offset
fname = "%s_part.bin" % (part.Name)
fname = replace_bad(fname, map(chr, range(128, 256) + range(0, 32)))
print " => %s" % (fname)
open(fname, "wb").write(f[soff:soff+part.Size])
if part.ptype() == PT_CODE:
extract_code_mods(nm, f, soff)
def find_part(self, name):
for part in self.parts:
if part.Name == name:
return part
return None
def pprint(self):
print "===ME Flash Partition Table==="
print "NumEntries: %d" % len(self.parts)
print "Version: %d.%d" % (self.BCDVer >> 4, self.BCDVer & 0xF)
print "EntryType: %02X" % (self.FPTEntryType)
print "HeaderLen: %02X" % (self.HeaderLen)
print "Checksum: %02X" % (self.Checksum)
print "FlashCycleLifetime: %d" % (self.FlashCycleLifetime)
print "FlashCycleLimit: %d" % (self.FlashCycleLimit)
print "UMASize: %d" % self.UMASize
print "Flags: %08X" % self.Flags
print " EFFS present: %d" % (self.Flags&1)
print " ME Layout Type: %d" % ((self.Flags>>1)&0xFF)
print "Extra ver: %d.%d.%d.%d" % (self.ExtraVer)
if self.rombjump:
print "ROM Bypass instruction: %s" % hexdump(self.rombjump)
print "---Partitions---"
for part in self.parts:
part.pprint()
print
print "------End-------"
region_names = ["Descriptor", "BIOS", "ME", "GbE", "PDR", "Region 5", "Region 6", "Region 7" ]
region_fnames =["Flash Descriptor", "BIOS Region", "ME Region", "GbE Region", "PDR Region", "Region 5", "Region 6", "Region 7" ]
def print_flreg(val, name):
print "%s region:" % name
lim = ((val >> 4) & 0xFFF000)
base = (val << 12) & 0xFFF000
if lim == 0 and base == 0xFFF000:
print " [unused]"
return None
lim |= 0xFFF
print " %08X - %08X (0x%08X bytes)" % (base, lim, lim - base + 1)
return (base, lim)
def parse_descr(f, offset, extract):
mapoff = offset
if f[offset+0x10:offset+0x14] == "\x5A\xA5\xF0\x0F":
mapoff = offset + 0x10
elif f[offset:offset+0x4] != "\x5A\xA5\xF0\x0F":
return -1
print "Flash Descriptor found at %08X" % offset
FLMAP0, FLMAP1, FLMAP2 = struct.unpack("<III", f[mapoff+4:mapoff+0x10])
nr = (FLMAP0 >> 24) & 0x7