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Check md5sum in fixbaserom before trying to decompress (#1240)

This commit is contained in:
Derek Hensley 2023-05-11 09:49:02 -07:00 committed by GitHub
parent 67dc6879bb
commit d796187c01
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1 changed files with 8 additions and 0 deletions
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8
tools/fixbaserom.py
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@ -122,6 +122,7 @@ def decompress_rom(dmadata_addr, dmadata):
# re-calculate crc # re-calculate crc
return update_crc(decompressed) return update_crc(decompressed)
correct_compressed_str_hash = "2a0a8acb61538235bc1094d297fb6556"
correct_str_hash = "f46493eaa0628827dbd6ad3ecd8d65d6" correct_str_hash = "f46493eaa0628827dbd6ad3ecd8d65d6"
def get_str_hash(byte_array): def get_str_hash(byte_array):
@ -179,6 +180,13 @@ elif fileContent[0] == 0x37:
print("Byte swapping done.") print("Byte swapping done.")
# Check to see if the ROM is a compressed "vanilla" ROM
compressed_str_hash = get_str_hash(bytearray(fileContent))
if compressed_str_hash != correct_compressed_str_hash:
print("Error: Expected a hash of " + correct_compressed_str_hash + " but got " + compressed_str_hash + ". " +
"The baserom has probably been tampered, find a new one")
sys.exit(1)
# Decompress # Decompress
FILE_TABLE_OFFSET = 0x1A500 # 0x1C110 for JP1.0, 0x1C050 for JP1.1, 0x24F60 for debug FILE_TABLE_OFFSET = 0x1A500 # 0x1C110 for JP1.0, 0x1C050 for JP1.1, 0x24F60 for debug
if any([b != 0 for b in fileContent[FILE_TABLE_OFFSET + 0x9C:FILE_TABLE_OFFSET + 0x9C + 0x4]]): if any([b != 0 for b in fileContent[FILE_TABLE_OFFSET + 0x9C:FILE_TABLE_OFFSET + 0x9C + 0x4]]):