MetalMonday/me_cleaner
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add --truncate

Browse source
This commit is contained in:
Nicola Corna 2017-03-17 15:31:00 +01:00
parent 250b2ec123
commit 0ac4b4bfd4
1 changed files with 16 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
me_cleaner.py
View file

@ -299,6 +299,9 @@ if __name__ == "__main__":
"Read/Write permissions to the other regions on the "
"flash from the Intel Flash Descriptor (requires a "
"full dump)", action="store_true")
parser.add_argument("-t", "--truncate", help="truncate the empty part of "
"the firmware (requires a separated ME/TXE image)",
action="store_true")
parser.add_argument("-c", "--check", help="verify the integrity of the "
"fundamental parts of the firmware and exit",
action="store_true")
@ -310,15 +313,20 @@ if __name__ == "__main__":
if magic == b"$FPT":
print("ME/TXE image detected")
me_start = 0
f.seek(0, 2)
me_end = f.tell()
if args.descriptor:
sys.exit("-d requires a full dump")
me_start = 0
f.seek(0, 2)
me_end = f.tell()
elif magic == b"\x5a\xa5\xf0\x0f":
print("Full image detected")
if args.truncate:
sys.exit("-t requires a separated ME/TXE image")
f.seek(0x14)
flmap0, flmap1 = unpack("<II", f.read(8))
nr = flmap0 >> 24 & 0x7
@ -479,6 +487,11 @@ if __name__ == "__main__":
print("The ME region can be reduced up to:\n"
" {:08x}:{:08x} me"
.format(me_start, end_addr - 1))
elif args.truncate:
print("Truncating file at {:#x}..."
.format(end_addr))
f.truncate(end_addr)
else:
print("Found less modules than expected in the FTPR "
"partition; skipping modules removal")