Finds xbe sections in an hdd image using the section hashes

xbebrutehash.py

import sys
import hashlib

def brutehash(path, start, end, size, secthash):
    with open(path, 'rb') as fp:
        fp.seek(start)
        blocksize = 0x1000 # PAGE_SIZE
        seed = size.to_bytes(4, byteorder='little')
        for block in range(start, end, blocksize):
            fp.seek(block)
            data = fp.read(size)
            ctx = hashlib.sha1()
            ctx.update(seed)
            ctx.update(data)
            digest = ctx.digest()
            if secthash != digest:
                print(f"Nope at {block:X} ({secthash} != {digest})")
            else:
                print(f"Found at {block:X} ({secthash} == {digest})")
                return

if __name__ == "__main__":
    print(len(sys.argv))
    if (len(sys.argv) != 6):
        print(f"Usage: {sys.argv[0]} <image path> <start offset> <end offset> <size in hex> <section hash>")
        quit()
    imagepath = sys.argv[1]
    start = int(sys.argv[2],16)
    end = int(sys.argv[3],16)
    size = int(sys.argv[4],16)
    secthash = bytes.fromhex(sys.argv[5])
    print(f"Start: {start}")
    print(f"End: {end}")
    print(f"Size: {size}")
    print(f"SectHash: {secthash}")
    brutehash(imagepath, start, end, size, secthash)