2019-04-02 12:54:00 +02:00
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from builtins import bytes
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import pytest
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from olm import OlmSasError, Sas
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MESSAGE = "Test message"
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EXTRA_INFO = "extra_info"
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class TestClass(object):
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def test_sas_creation(self):
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sas = Sas()
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assert sas.pubkey
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def test_other_key_setting(self):
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sas_alice = Sas()
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sas_bob = Sas()
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assert not sas_alice.other_key_set
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sas_alice.set_their_pubkey(sas_bob.pubkey)
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assert sas_alice.other_key_set
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def test_bytes_generating(self):
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sas_alice = Sas()
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sas_bob = Sas(sas_alice.pubkey)
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assert sas_bob.other_key_set
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with pytest.raises(OlmSasError):
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sas_alice.generate_bytes(EXTRA_INFO, 5)
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sas_alice.set_their_pubkey(sas_bob.pubkey)
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with pytest.raises(ValueError):
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sas_alice.generate_bytes(EXTRA_INFO, 0)
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alice_bytes = sas_alice.generate_bytes(EXTRA_INFO, 5)
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bob_bytes = sas_bob.generate_bytes(EXTRA_INFO, 5)
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assert alice_bytes == bob_bytes
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def test_mac_generating(self):
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sas_alice = Sas()
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sas_bob = Sas()
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with pytest.raises(OlmSasError):
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sas_alice.calculate_mac(MESSAGE, EXTRA_INFO)
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sas_alice.set_their_pubkey(sas_bob.pubkey)
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sas_bob.set_their_pubkey(sas_alice.pubkey)
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alice_mac = sas_alice.calculate_mac(MESSAGE, EXTRA_INFO)
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bob_mac = sas_bob.calculate_mac(MESSAGE, EXTRA_INFO)
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assert alice_mac == bob_mac
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def test_cross_language_mac(self):
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"""Test MAC generating with a predefined key pair.
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This test imports a private and public key from the C test and checks
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if we are getting the same MAC that the C code calculated.
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"""
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alice_private = [
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0x77, 0x07, 0x6D, 0x0A, 0x73, 0x18, 0xA5, 0x7D,
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0x3C, 0x16, 0xC1, 0x72, 0x51, 0xB2, 0x66, 0x45,
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0xDF, 0x4C, 0x2F, 0x87, 0xEB, 0xC0, 0x99, 0x2A,
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0xB1, 0x77, 0xFB, 0xA5, 0x1D, 0xB9, 0x2C, 0x2A
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]
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bob_key = "3p7bfXt9wbTTW2HC7OQ1Nz+DQ8hbeGdNrfx+FG+IK08"
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message = "Hello world!"
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extra_info = "MAC"
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expected_mac = "2nSMTXM+TStTU3RUVTNSVVZUTlNWVlpVVGxOV1ZscFY"
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sas_alice = Sas()
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sas_alice._create_sas(bytes(alice_private), 32)
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sas_alice.set_their_pubkey(bob_key)
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alice_mac = sas_alice.calculate_mac(message, extra_info)
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assert alice_mac == expected_mac
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2019-04-09 10:57:36 +02:00
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def test_long_mac_generating(self):
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sas_alice = Sas()
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sas_bob = Sas()
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with pytest.raises(OlmSasError):
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sas_alice.calculate_mac_long_kdf(MESSAGE, EXTRA_INFO)
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sas_alice.set_their_pubkey(sas_bob.pubkey)
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sas_bob.set_their_pubkey(sas_alice.pubkey)
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alice_mac = sas_alice.calculate_mac_long_kdf(MESSAGE, EXTRA_INFO)
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bob_mac = sas_bob.calculate_mac_long_kdf(MESSAGE, EXTRA_INFO)
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bob_short_mac = sas_bob.calculate_mac(MESSAGE, EXTRA_INFO)
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assert alice_mac == bob_mac
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assert alice_mac != bob_short_mac
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