mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 05:28:40 +00:00
42 lines
1.1 KiB
Plaintext
42 lines
1.1 KiB
Plaintext
|
#!/usr/bin/env python
|
||
|
|
from __future__ import print_function
|
||
|
|
|
||
|
|
import binascii
|
||
|
|
import hashlib
|
||
|
|
|
||
|
|
|
||
|
|
def H(x):
|
||
|
|
return hashlib.sha256(x).digest()
|
||
|
|
|
||
|
|
|
||
|
|
def compute_fingerprint(x, double):
|
||
|
|
digest = H(H(x)) if double else H(x)
|
||
|
|
return binascii.hexlify(digest).decode()
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
import argparse
|
||
|
|
|
||
|
|
parser = argparse.ArgumentParser()
|
||
|
|
|
||
|
|
parser.add_argument("file", type=argparse.FileType("rb"),
|
||
|
|
help="input file")
|
||
|
|
parser.add_argument("--offset", type=int, default=0,
|
||
|
|
help="skip bytes at start of input")
|
||
|
|
parser.add_argument("--max-size", type=int,
|
||
|
|
help="maximum input file size")
|
||
|
|
parser.add_argument("--double", action="store_true",
|
||
|
|
help="use SHA-256d instead of SHA-256")
|
||
|
|
|
||
|
|
args = parser.parse_args()
|
||
|
|
|
||
|
|
data = args.file.read()
|
||
|
|
size = len(data)
|
||
|
|
fingerprint = compute_fingerprint(data[args.offset:], args.double)
|
||
|
|
|
||
|
|
print("Filename :", args.file.name)
|
||
|
|
print("Fingerprint :", fingerprint)
|
||
|
|
|
||
|
|
print("Size : {} bytes (out of {} maximum)"
|
||
|
|
.format(size, args.max_size))
|