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device_tests: add a compat test for cosi, checking interoperability between Trezor and local implementation

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This commit is contained in:
matejcik 2018-05-28 17:41:52 +02:00
parent 8410151810
commit 5191fd09be
1 changed files with 19 additions and 0 deletions
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19
trezorlib/tests/device_tests/test_cosi.py
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@ -78,3 +78,22 @@ class TestCosi(TrezorTest):
sig = cosi.combine_sig(global_R, [sig0.signature, sig1.signature, sig2.signature])
cosi.verify(sig, digest, global_pk)
def test_cosi_compat(self):
self.setup_mnemonic_pin_passphrase()
digest = sha256(b'this is not a pipe').digest()
remote_commit = self.client.cosi_commit(parse_path("10018'/0'"), digest)
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 = self.client.cosi_sign(parse_path("10018'/0'"), digest, global_R, global_pk)
local_sig = cosi.sign_with_privkey(digest, local_privkey, global_pk, local_nonce, global_R)
sig = cosi.combine_sig(global_R, [remote_sig.signature, local_sig])
cosi.verify(sig, digest, global_pk)