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https://github.com/ghidraninja/game-and-watch-hacking.git
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33 lines
834 B
Python
Executable File
33 lines
834 B
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import sys
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parser = argparse.ArgumentParser(description='Extract XOR-key from flash dump & RAM dump.')
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parser = argparse.ArgumentParser()
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parser.add_argument('flash', nargs=1, type=argparse.FileType('rb'))
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parser.add_argument('ram_dump', nargs=1, type=argparse.FileType('rb'))
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parser.add_argument('xor_key', nargs=1, type=argparse.FileType('wb'))
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parser.add_argument('--length', '-l', type=int, default=40*1024)
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args = parser.parse_args()
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LEN=args.length
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ram_dump = args.ram_dump[0].read(LEN)
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# Start of ROM in flash
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args.flash[0].seek(0x1e60)
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flash = args.flash[0].read(LEN)
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def xor(b1, b2):
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result = bytearray()
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for b1, b2 in zip(b1, b2):
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result.append(b1 ^ b2)
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return result
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args.xor_key[0].write(xor(ram_dump, flash))
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print(f"XOR stream successfully written!")
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