mirror of
https://github.com/trezor/trezor-firmware.git
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42 lines
1.1 KiB
Python
Executable File
42 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python
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from __future__ import print_function
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import binascii
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import hashlib
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def H(x):
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return hashlib.sha256(x).digest()
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def compute_fingerprint(x, double):
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digest = H(H(x)) if double else H(x)
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return binascii.hexlify(digest).decode()
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if __name__ == "__main__":
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import argparse
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parser = argparse.ArgumentParser()
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parser.add_argument("file", type=argparse.FileType("rb"),
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help="input file")
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parser.add_argument("--offset", type=int, default=0,
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help="skip bytes at start of input")
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parser.add_argument("--max-size", type=int,
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help="maximum input file size")
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parser.add_argument("--double", action="store_true",
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help="use SHA-256d instead of SHA-256")
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args = parser.parse_args()
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data = args.file.read()
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size = len(data)
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fingerprint = compute_fingerprint(data[args.offset:], args.double)
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print("Filename :", args.file.name)
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print("Fingerprint :", fingerprint)
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print("Size : {} bytes (out of {} maximum)"
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.format(size, args.max_size))
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