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https://github.com/Atmosphere-NX/Atmosphere.git
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35 lines
1 KiB
Python
35 lines
1 KiB
Python
#!/usr/bin/env python
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import sys, lz4, hashlib
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from struct import unpack as up, pack as pk
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def lz4_compress(data):
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try:
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import lz4.block as block
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except ImportError:
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block = lz4.LZ4_compress
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return block.compress(data, 'high_compression', store_size=False)
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def read_file(fn):
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with open(fn, 'rb') as f:
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return f.read()
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def get_overlay(program, i):
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return program[0x2B000 + 0x14000 * i:0x2B000 + 0x14000 * (i+1)]
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def main(argc, argv):
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if argc != 3:
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print('Usage: %s in out' % argv[0])
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return 1
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data = read_file(argv[1])
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erista_mtc = get_overlay(data, 1)
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mariko_mtc = get_overlay(data, 2)
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erista_hsh = hashlib.sha256(erista_mtc[:-4]).digest()[:4]
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mariko_hsh = hashlib.sha256(mariko_mtc[:-4]).digest()[:4]
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fusee_program = lz4_compress(data[:0x2B000 - 8] + erista_hsh + mariko_hsh + get_overlay(data, 0)[:0x11000])
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with open(argv[2], 'wb') as f:
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f.write(fusee_program)
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return 0
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if __name__ == '__main__':
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sys.exit(main(len(sys.argv), sys.argv))
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