mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-28 09:08:07 +00:00
110 lines
3.3 KiB
Python
Executable File
110 lines
3.3 KiB
Python
Executable File
#!/usr/bin/env python3
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import binascii
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import click
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import pyblake2
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from trezorlib import ed25519raw, ed25519cosi
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indexmap = {
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'bootloader': 0,
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'vendorheader': 1,
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'firmware': 2,
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}
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def get_trezor():
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from trezorlib.client import TrezorClient
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from trezorlib.transport_hid import HidTransport
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devices = HidTransport.enumerate()
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if len(devices) > 0:
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return TrezorClient(devices[0])
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else:
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raise Exception('No TREZOR found')
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@click.group()
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def cli():
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pass
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@cli.command(help='')
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@click.argument('index', type=click.Choice(indexmap.keys()))
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@click.argument('filename')
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@click.argument('seckey', required=False)
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def commit(index, filename, seckey):
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index = indexmap[index]
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data = open(filename, 'rb').read()
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digest = pyblake2.blake2s(data).digest()
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ctr = 0
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if seckey:
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sk = binascii.unhexlify(seckey)
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pk = ed25519raw.publickey(sk)
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_, R = ed25519cosi.get_nonce(sk, digest, ctr)
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else:
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t = get_trezor()
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commit = t.cosi_commit(t.expand_path("10018'/%d'" % index), digest)
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pk = commit.pubkey
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R = commit.commitment
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print('%s+%s' % (binascii.hexlify(pk).decode(), binascii.hexlify(R).decode()))
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@cli.command(help='')
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@click.argument('commits', nargs=-1)
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def global_commit(commits):
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if len(commits) < 1:
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raise Exception('Need to provide at least one commit')
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pk, R = [], []
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for c in commits:
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a, b = c.split('+')
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pk.append(binascii.unhexlify(a))
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R.append(binascii.unhexlify(b))
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global_pk = ed25519cosi.combine_keys(pk)
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global_R = ed25519cosi.combine_keys(R)
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print('%s+%s' % (binascii.hexlify(global_pk).decode(), binascii.hexlify(global_R).decode()))
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@cli.command(help='')
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@click.argument('index', type=click.Choice(indexmap.keys()))
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@click.argument('filename')
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@click.argument('global_commit')
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@click.argument('seckey', required=False)
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def sign(index, filename, global_commit, seckey):
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index = indexmap[index]
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data = open(filename, 'rb').read()
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digest = pyblake2.blake2s(data).digest()
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global_pk, global_R = [binascii.unhexlify(x) for x in global_commit.split('+')]
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ctr = 0
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if seckey:
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sk = binascii.unhexlify(seckey)
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r, _ = ed25519cosi.get_nonce(sk, digest, ctr)
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h = ed25519raw.H(sk)
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b = ed25519raw.b
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a = 2 ** (b - 2) + sum(2 ** i * ed25519raw.bit(h, i) for i in range(3, b - 2))
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S = (r + ed25519raw.Hint(global_R + global_pk + digest) * a) % ed25519raw.l
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sig = ed25519raw.encodeint(S)
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else:
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t = get_trezor()
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signature = t.cosi_sign(t.expand_path("10018'/%d'" % index), digest, global_R, global_pk)
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sig = signature.signature
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print(binascii.hexlify(sig).decode())
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@cli.command(help='')
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@click.argument('filename')
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@click.argument('global_commit')
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@click.argument('signatures', nargs=-1)
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def global_sign(filename, global_commit, signatures):
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data = open(filename, 'rb').read()
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digest = pyblake2.blake2s(data).digest()
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global_pk, global_R = [binascii.unhexlify(x) for x in global_commit.split('+')]
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signatures = [binascii.unhexlify(x) for x in signatures]
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sig = ed25519cosi.combine_sig(global_R, signatures)
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ed25519raw.checkvalid(sig, digest, global_pk)
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print(binascii.hexlify(sig).decode())
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if __name__ == '__main__':
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cli()
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