mirror of
https://github.com/trezor/trezor-firmware.git
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23 lines
729 B
Python
23 lines
729 B
Python
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#!/usr/bin/env python3
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import sys
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from hashlib import sha256
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import ecdsa
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# arg 1 - hex digest of firmware header with zeroed sigslots
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# arg 2 - public key (compressed or uncompressed)
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# arg 3 - signature 64 bytes in hex
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digest = bytes.fromhex(sys.argv[1])
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assert len(digest) == 32
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public_key = bytes.fromhex(sys.argv[2])
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sig = bytes.fromhex(sys.argv[3])
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assert len(sig) == 64
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# 0x18 - coin info, 0x20 - length of digest following
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prefix = b"\x18Bitcoin Signed Message:\n\x20"
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message_predigest = prefix + digest
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message = sha256(message_predigest).digest()
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vk = ecdsa.VerifyingKey.from_string(public_key, curve=ecdsa.SECP256k1, hashfunc=sha256)
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result = vk.verify(sig, message)
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print("Signature verification result", result)
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