mirror of
https://github.com/trezor/trezor-firmware.git
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111 lines
3.9 KiB
Python
111 lines
3.9 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2019 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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from hashlib import sha256
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import pytest
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from trezorlib import cosi
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from trezorlib.debuglink import TrezorClientDebugLink as Client
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from trezorlib.tools import parse_path
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pytestmark = pytest.mark.skip_t2
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DIGEST = sha256(b"this is not a pipe").digest()
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def test_cosi_pubkey(client: Client):
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c0 = cosi.commit(client, parse_path("m/10018h/0h"))
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c1 = cosi.commit(client, parse_path("m/10018h/1h"))
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c2 = cosi.commit(client, parse_path("m/10018h/2h"))
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assert c0.pubkey != c1.pubkey
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assert c0.pubkey != c2.pubkey
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assert c1.pubkey != c2.pubkey
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def test_cosi_nonce(client: Client):
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# The nonce/commitment must change after each signing.
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c0 = cosi.commit(client, parse_path("m/10018h/0h"))
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cosi.sign(client, parse_path("m/10018h/0h"), DIGEST, c0.commitment, c0.pubkey)
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c1 = cosi.commit(client, parse_path("m/10018h/0h"))
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assert c0.commitment != c1.commitment
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def test_cosi_sign1(client: Client):
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# Single party signature.
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commit = cosi.commit(client, parse_path("m/10018h/0h"))
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sig = cosi.sign(
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client, parse_path("m/10018h/0h"), DIGEST, commit.commitment, commit.pubkey
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)
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signature = cosi.combine_sig(commit.commitment, [sig.signature])
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cosi.verify_combined(signature, DIGEST, commit.pubkey)
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def test_cosi_sign2(client: Client):
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# Two party signature.
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remote_commit = cosi.commit(client, parse_path("m/10018h/1h"))
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local_privkey = sha256(b"private key").digest()[:32]
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local_pubkey = cosi.pubkey_from_privkey(local_privkey)
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local_nonce, local_commitment = cosi.get_nonce(local_privkey, DIGEST, 42)
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global_pk = cosi.combine_keys([remote_commit.pubkey, local_pubkey])
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global_R = cosi.combine_keys([remote_commit.commitment, local_commitment])
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remote_sig = cosi.sign(
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client, parse_path("m/10018h/1h"), DIGEST, global_R, global_pk
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)
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local_sig = cosi.sign_with_privkey(
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DIGEST, local_privkey, global_pk, local_nonce, global_R
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)
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signature = cosi.combine_sig(global_R, [remote_sig.signature, local_sig])
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cosi.verify_combined(signature, DIGEST, global_pk)
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def test_cosi_sign3(client: Client):
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# Three party signature.
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remote_commit = cosi.commit(client, parse_path("m/10018h/2h"))
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local_privkey1 = sha256(b"private key").digest()[:32]
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local_pubkey1 = cosi.pubkey_from_privkey(local_privkey1)
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local_nonce1, local_commitment1 = cosi.get_nonce(local_privkey1, DIGEST, 42)
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local_privkey2 = sha256(b"private key").digest()[:32]
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local_pubkey2 = cosi.pubkey_from_privkey(local_privkey2)
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local_nonce2, local_commitment2 = cosi.get_nonce(local_privkey2, DIGEST, 42)
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global_pk = cosi.combine_keys([remote_commit.pubkey, local_pubkey1, local_pubkey2])
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global_R = cosi.combine_keys(
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[remote_commit.commitment, local_commitment1, local_commitment2]
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)
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remote_sig = cosi.sign(
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client, parse_path("m/10018h/2h"), DIGEST, global_R, global_pk
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)
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local_sig1 = cosi.sign_with_privkey(
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DIGEST, local_privkey1, global_pk, local_nonce1, global_R
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)
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local_sig2 = cosi.sign_with_privkey(
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DIGEST, local_privkey2, global_pk, local_nonce2, global_R
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)
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signature = cosi.combine_sig(
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global_R, [remote_sig.signature, local_sig1, local_sig2]
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)
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cosi.verify_combined(signature, DIGEST, global_pk)
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