# This file is part of the TREZOR project. # # Copyright (C) 2012-2016 Marek Palatinus # Copyright (C) 2012-2016 Pavol Rusnak # # This library is free software: you can redistribute it and/or modify # it under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # 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 GNU Lesser General Public License # along with this library. If not, see . from . import common import pytest import hashlib from trezorlib import ed25519raw, ed25519cosi @pytest.mark.skip_t2 class TestCosi(common.TrezorTest): def test_cosi_commit(self): self.setup_mnemonic_pin_passphrase() digest = hashlib.sha256(b'this is a message').digest() c0 = self.client.cosi_commit(self.client.expand_path("10018'/0'"), digest) c1 = self.client.cosi_commit(self.client.expand_path("10018'/1'"), digest) c2 = self.client.cosi_commit(self.client.expand_path("10018'/2'"), digest) assert c0.pubkey != c1.pubkey assert c0.pubkey != c2.pubkey assert c1.pubkey != c2.pubkey assert c0.commitment != c1.commitment assert c0.commitment != c2.commitment assert c1.commitment != c2.commitment digestb = hashlib.sha256(b'this is a different message').digest() c0b = self.client.cosi_commit(self.client.expand_path("10018'/0'"), digestb) c1b = self.client.cosi_commit(self.client.expand_path("10018'/1'"), digestb) c2b = self.client.cosi_commit(self.client.expand_path("10018'/2'"), digestb) assert c0.pubkey == c0b.pubkey assert c1.pubkey == c1b.pubkey assert c2.pubkey == c2b.pubkey assert c0.commitment != c0b.commitment assert c1.commitment != c1b.commitment assert c2.commitment != c2b.commitment def test_cosi_sign(self): self.setup_mnemonic_pin_passphrase() digest = hashlib.sha256(b'this is a message').digest() c0 = self.client.cosi_commit(self.client.expand_path("10018'/0'"), digest) c1 = self.client.cosi_commit(self.client.expand_path("10018'/1'"), digest) c2 = self.client.cosi_commit(self.client.expand_path("10018'/2'"), digest) global_pk = ed25519cosi.combine_keys([c0.pubkey, c1.pubkey, c2.pubkey]) global_R = ed25519cosi.combine_keys([c0.commitment, c1.commitment, c2.commitment]) sig0 = self.client.cosi_sign(self.client.expand_path("10018'/0'"), digest, global_R, global_pk) sig1 = self.client.cosi_sign(self.client.expand_path("10018'/1'"), digest, global_R, global_pk) sig2 = self.client.cosi_sign(self.client.expand_path("10018'/2'"), digest, global_R, global_pk) sig = ed25519cosi.combine_sig(global_R, [sig0.signature, sig1.signature, sig2.signature]) ed25519raw.checkvalid(sig, digest, global_pk)