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"""
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Common tools that may be used by many
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@author: Christoph J. Scherr <software@cscherr.de>
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@license: MIT
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@source: https://git.cscherr.de/PlexSheep/plexcryptool/src/branch/master/plexcryptool/trash-hash.py
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"""
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from math import floor
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def byte_xor(ba0: bytearray, ba1: bytearray) -> bytearray:
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"""
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helper function for bytewise xor
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"""
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ba2: bytearray = bytearray(0)
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for (b0, b1) in zip(ba0, ba1):
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ba2.append((b0 ^ b1))
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#print("xored:\n%s" % ba2.hex())
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return ba2
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def calc_byte_len(n: int) -> int:
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"""
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helper function to calculate the length in bytes
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"""
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len = n.bit_length() / 8
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if len > floor(len):
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return 1 + floor(len)
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else:
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return floor(len)
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0976f89569d94414fed4f7714cd85c840dbf338781926f5d1f6284688c97eaeef7f42b3d844c70468cfb960092235855da5d5c66107dfee4204c1a78512ee00306da957a856a085affe40b2ab32fc90a8c8e059feea9a83e753618aeae04884aa1658afe59a69c30ec5c014a5da06ff484143ca1ea884b44a3f92d063db8503f
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@ -79,7 +79,7 @@ def mgf1(seed: bytearray, length: int, hash_func=hashlib.sha256) -> bytearray:
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# 4.Output the leading l octets of T as the octet string mask.
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return bytearray(T[:length])
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def byte_xor(ba0: bytearray, ba1: bytearray):
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def byte_xor(ba0: bytearray, ba1: bytearray) -> bytearray:
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"""
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helper function for bytewise xor
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"""
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@ -203,7 +203,8 @@ def main():
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else:
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ha = bytearray(0)
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if args.message:
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m = bytearray.fromhex(args.message)
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m = bytearray(str.encode(args.message))
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print("msg: %s" % m.hex())
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else:
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m = bytearray.fromhex("466f6f62617220313233343536373839")
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if args.seed:
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