mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-27 00:28:10 +00:00
tools: split computation of signatures to keyctl, remove from binctl
This commit is contained in:
Pavol Rusnak
parent
383b5d7c89
commit
57f2eee5bf
86
tools/binctl
86
tools/binctl
@ -5,73 +5,10 @@ from __future__ import print_function
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import sys
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import struct
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import binascii
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import pyblake2
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from trezorlib import ed25519raw, ed25519cosi
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if sys.version_info.major < 3:
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input = raw_input
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def get_trezor(index):
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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) > index:
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return TrezorClient(devices[index])
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else:
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raise Exception('TREZOR with such index not found')
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def sign_data(seckeys, data):
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digest = pyblake2.blake2s(data).digest()
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if len(seckeys) == 1:
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sk = seckeys[0]
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pk = ed25519raw.publickey(sk)
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return ed25519raw.signature(digest, sk, pk)
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else:
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ctr = 0
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pubkeys = []
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nonces = []
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commits = []
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for i, sk in enumerate(seckeys):
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if sk == 'trezor':
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t = get_trezor(i)
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# FIXME: path below should change according to what is being signed
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commit = t.cosi_commit(t.expand_path("10018'/0'"), digest)
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pk = commit.pubkey
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r = None
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R = commit.commitment
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else:
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pk = ed25519raw.publickey(sk)
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r, R = ed25519cosi.get_nonce(sk, digest, ctr)
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pubkeys.append(pk)
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nonces.append(r)
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commits.append(R)
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global_pk = ed25519cosi.combine_keys(pubkeys)
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global_R = ed25519cosi.combine_keys(commits)
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sigs = []
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for i, sk in enumerate(seckeys):
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if sk == 'trezor':
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t = get_trezor(i)
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# FIXME: path below should change according to what is being signed
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signature = t.cosi_sign(t.expand_path("10018'/0'"), digest, global_R, global_pk)
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sig = signature.signature
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else:
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r = nonces[i]
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R = commits[i]
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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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sigs.append(sig)
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sig = ed25519cosi.combine_sig(global_R, sigs)
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ed25519raw.checkvalid(sig, digest, global_pk)
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return sig
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def format_sigmask(sigmask):
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bits = [str(b + 1) if sigmask & (1 << b) else '.' for b in range(8)]
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return '0x%02x = [%s]' % (sigmask, ' '.join(bits))
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@ -136,12 +73,12 @@ class BinImage(object):
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assert len(header) == self.hdrlen
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return header
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def sign(self, sigmask, seckeys):
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def sign(self, sigmask, signature):
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header = self.serialize_header(sig=False)
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data = header + self.code
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assert len(data) == self.hdrlen + self.codelen
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self.sigmask = sigmask
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self.sig = sign_data(seckeys, data)
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self.sig = signature
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def write(self, filename):
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with open(filename, 'wb') as f:
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@ -240,10 +177,7 @@ class VendorHeader(object):
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assert len(header) == self.hdrlen
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return header
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def sign(self, sigmask, seckeys):
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# check whether provided arguments match vsig_m/vsig_n
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if len(seckeys) != self.vsig_m:
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raise Exception('invalid number of signatures (vsig_m expected %d, got %d)' % (self.vsig_m, len(seckeys)))
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def sign(self, sigmask, signature):
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if sigmask >= (1 << self.vsig_n):
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raise Exception('signature index is higher than vsig_n (%d)' % self.vsig_n)
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if bin(sigmask).count('1') != self.vsig_m:
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@ -251,7 +185,7 @@ class VendorHeader(object):
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# sign
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header = self.serialize_header(sig=False)
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self.sigmask = sigmask
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self.sig = sign_data(seckeys, header)
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self.sig = signature
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def write(self, filename):
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with open(filename, 'wb') as f:
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@ -278,7 +212,7 @@ def binopen(filename):
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def main():
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if len(sys.argv) < 2:
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print('Usage: binctl file.bin [-s index seckey]')
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print('Usage: binctl file.bin [-s sigmask signature]')
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return 1
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fn = sys.argv[1]
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sign = len(sys.argv) > 2 and sys.argv[2] == '-s'
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@ -290,14 +224,8 @@ def main():
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sigmask |= 1 << (int(idx) - 1)
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else:
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sigmask = 1 << (int(sys.argv[3]) - 1)
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if ':' in sys.argv[4]:
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seckeys = sys.argv[4].split(':')
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for i in range(len(seckeys)):
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if seckeys[i] != 'trezor':
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seckeys[i] = binascii.unhexlify(seckeys[i])
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else:
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seckeys = [binascii.unhexlify(sys.argv[4])]
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b.sign(sigmask, seckeys)
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signature = binascii.unhexlify(sys.argv[4])
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b.sign(sigmask, signature)
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print()
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b.write(fn)
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b.print()
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109
tools/keyctl
Executable file
109
tools/keyctl
Executable file
@ -0,0 +1,109 @@
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#!/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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