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trezor-firmware/tests/device_tests/misc/test_cosi.py
Martin Milata e7f2d3f6cc test(core): use internal model names
[no changelog]
2024-03-12 20:55:23 +00:00

160 lines
5.2 KiB
Python

# This file is part of the Trezor project.
#
# Copyright (C) 2012-2019 SatoshiLabs and contributors
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the License along with this library.
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
from hashlib import sha256
import pytest
from trezorlib import cosi
from trezorlib.debuglink import TrezorClientDebugLink as Client
from trezorlib.exceptions import TrezorFailure
from trezorlib.tools import H_, Address, parse_path
DIGEST = sha256(b"this is not a pipe").digest()
def test_cosi_pubkey(client: Client):
c0 = cosi.commit(client, parse_path("m/10018h/0h"))
c1 = cosi.commit(client, parse_path("m/10018h/1h"))
c2 = cosi.commit(client, parse_path("m/10018h/2h"))
assert c0.pubkey != c1.pubkey
assert c0.pubkey != c2.pubkey
assert c1.pubkey != c2.pubkey
def test_cosi_nonce(client: Client):
# The nonce/commitment must change after each signing.
c0 = cosi.commit(client, parse_path("m/10018h/0h"))
cosi.sign(client, parse_path("m/10018h/0h"), DIGEST, c0.commitment, c0.pubkey)
c1 = cosi.commit(client, parse_path("m/10018h/0h"))
assert c0.commitment != c1.commitment
def test_cosi_sign1(client: Client):
# Single party signature.
commit = cosi.commit(client, parse_path("m/10018h/0h"))
sig = cosi.sign(
client, parse_path("m/10018h/0h"), DIGEST, commit.commitment, commit.pubkey
)
signature = cosi.combine_sig(commit.commitment, [sig.signature])
cosi.verify_combined(signature, DIGEST, commit.pubkey)
def test_cosi_sign2(client: Client):
# Two party signature.
remote_commit = cosi.commit(client, parse_path("m/10018h/1h"))
local_privkey = sha256(b"private key").digest()[:32]
local_pubkey = cosi.pubkey_from_privkey(local_privkey)
local_nonce, local_commitment = cosi.get_nonce(local_privkey, DIGEST, 42)
global_pk = cosi.combine_keys([remote_commit.pubkey, local_pubkey])
global_R = cosi.combine_keys([remote_commit.commitment, local_commitment])
remote_sig = cosi.sign(
client, parse_path("m/10018h/1h"), DIGEST, global_R, global_pk
)
local_sig = cosi.sign_with_privkey(
DIGEST, local_privkey, global_pk, local_nonce, global_R
)
signature = cosi.combine_sig(global_R, [remote_sig.signature, local_sig])
cosi.verify_combined(signature, DIGEST, global_pk)
def test_cosi_sign3(client: Client):
# Three party signature.
remote_commit = cosi.commit(client, parse_path("m/10018h/2h"))
local_privkey1 = sha256(b"private key").digest()[:32]
local_pubkey1 = cosi.pubkey_from_privkey(local_privkey1)
local_nonce1, local_commitment1 = cosi.get_nonce(local_privkey1, DIGEST, 42)
local_privkey2 = sha256(b"private key").digest()[:32]
local_pubkey2 = cosi.pubkey_from_privkey(local_privkey2)
local_nonce2, local_commitment2 = cosi.get_nonce(local_privkey2, DIGEST, 42)
global_pk = cosi.combine_keys([remote_commit.pubkey, local_pubkey1, local_pubkey2])
global_R = cosi.combine_keys(
[remote_commit.commitment, local_commitment1, local_commitment2]
)
remote_sig = cosi.sign(
client, parse_path("m/10018h/2h"), DIGEST, global_R, global_pk
)
local_sig1 = cosi.sign_with_privkey(
DIGEST, local_privkey1, global_pk, local_nonce1, global_R
)
local_sig2 = cosi.sign_with_privkey(
DIGEST, local_privkey2, global_pk, local_nonce2, global_R
)
signature = cosi.combine_sig(
global_R, [remote_sig.signature, local_sig1, local_sig2]
)
cosi.verify_combined(signature, DIGEST, global_pk)
@pytest.mark.skip_t1b1
def test_cosi_different_key(client: Client):
with pytest.raises(TrezorFailure):
commit = cosi.commit(client, parse_path("m/10018h/0h"))
cosi.sign(
client, parse_path("m/10018h/1h"), DIGEST, commit.commitment, commit.pubkey
)
@pytest.mark.parametrize(
"model, image_type",
(
(b"T1B1", 0),
(b"T2T1", 0),
(b"T2B1", 0),
(b"T3W1", 0),
(b"\xfe\xfe\xfe\xfe", 0),
(b"\x00", 0),
(b"\x00", 3),
(b"dog", 0),
(b"42", 0),
(b"T2B1", 1),
(b"T2B1", 2),
(b"T2B1", 3),
),
)
@pytest.mark.skip_t1b1
def test_slip26_paths(client: Client, model: bytes, image_type: int):
slip26_model = int.from_bytes(model, "little")
path = Address([H_(10026), H_(slip26_model), H_(image_type), H_(0)])
commit = cosi.commit(client, path)
cosi.sign(client, path, DIGEST, commit.commitment, commit.pubkey)
@pytest.mark.parametrize(
"path",
(
"m/44h/0h/0h/0/0",
"m/44h/60h/0h/0/0",
"m/44h/60h/1h",
"m/84h/60h/1h/0",
"m/1",
"m/10018/0",
),
)
def test_invalid_path(client: Client, path: str) -> None:
with pytest.raises(TrezorFailure, match="DataError"):
cosi.commit(client, parse_path(path))