def test_cli_sign_writes_correct_signature_to_stdout(self):
keypair = lamp.generate_keys()
msg = 'hey'
priv_name = 'test_priv.key'
sig_name = 'test_sign.txt'
expected_sig = lamp.sign_message(keypair.priv, msg)
lamp.export_key(keypair.priv, priv_name)
with patch('sys.stdout', new=StringIO()) as fake_out:
lamp.cli(['sign', '--priv', priv_name, '--msg', msg])
self.assertEqual(lamp.str_to_sig(fake_out.getvalue()),
expected_sig)
def test_cli_verify_signature_with_inline_msg(self):
keypair = lamp.generate_keys()
msg = 'hey'
pub_name = 'test_pub.key'
sig_name = 'test_sign.txt'
sig = lamp.sign_message(keypair.priv, msg)
lamp.export_key(keypair.pub, pub_name)
with open(sig_name, 'w') as f:
f.write(''.join(sig).strip())
with patch('sys.stdout', new=StringIO()) as fake_out:
lamp.cli(
['verify', '--pub', pub_name, '--msg', msg, '--sig', sig_name])
self.assertEqual(fake_out.getvalue().strip(), 'valid')
def test_signature_is_256_blocks_long(self):
msg = 'test message'
signature = lamp.sign_message(self.priv, msg)
self.assertEqual(len(signature), 256)
def test_verify_signature_fails_on_different_fails(self):
msg = 'test message'
signature = lamp.sign_message(self.priv, msg)
different_pub = lamp.generate_keys().pub
self.assertFalse(lamp.verify_signature(different_pub, msg, signature))
def test_verify_signature_succeeds_on_same_key(self):
msg = 'test message'
signature = lamp.sign_message(self.priv, msg)
self.assertTrue(lamp.verify_signature(self.pub, msg, signature))
def test_verify_signature_fails_on_different_message(self):
msg = 'a'
different_msg = 'b'
signature = lamp.sign_message(self.priv, msg)
self.assertFalse(
lamp.verify_signature(self.pub, different_msg, signature))