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https://github.com/aljazceru/python-teos.git
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258 lines
7.5 KiB
Python
258 lines
7.5 KiB
Python
import os
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from binascii import unhexlify
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives.asymmetric import ec
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from cryptography.hazmat.primitives import serialization
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from coincurve import PrivateKey, PublicKey
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import common.cryptographer
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from common.blob import Blob
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from common.logger import Logger
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from common.cryptographer import Cryptographer
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from common.encrypted_blob import EncryptedBlob
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from test.common.unit.conftest import get_random_value_hex
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common.cryptographer.logger = Logger(actor="Cryptographer", log_name_prefix="")
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data = "6097cdf52309b1b2124efeed36bd34f46dc1c25ad23ac86f28380f746254f777"
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key = "b2e984a570f6f49bc38ace178e09147b0aa296cbb7c92eb01412f7e2d07b5659"
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encrypted_data = "8f31028097a8bf12a92e088caab5cf3fcddf0d35ed2b72c24b12269373efcdea04f9d2a820adafe830c20ff132d89810"
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WRONG_TYPES = [None, 2134, 14.56, str(), list(), dict()]
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def generate_keypair():
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sk = PrivateKey()
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pk = sk.public_key
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return sk, pk
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def test_check_data_key_format_wrong_data():
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data = get_random_value_hex(64)[:-1]
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key = get_random_value_hex(32)
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try:
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Cryptographer.check_data_key_format(data, key)
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assert False
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except ValueError as e:
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assert "Odd-length" in str(e)
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def test_check_data_key_format_wrong_key():
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data = get_random_value_hex(64)
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key = get_random_value_hex(33)
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try:
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Cryptographer.check_data_key_format(data, key)
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assert False
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except ValueError as e:
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assert "32-byte hex" in str(e)
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def test_check_data_key_format():
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data = get_random_value_hex(64)
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key = get_random_value_hex(32)
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assert Cryptographer.check_data_key_format(data, key) is True
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def test_encrypt_odd_length_data():
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blob = Blob(get_random_value_hex(64)[-1])
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key = get_random_value_hex(32)
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try:
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Cryptographer.encrypt(blob, key)
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assert False
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except ValueError:
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assert True
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def test_encrypt_wrong_key_size():
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blob = Blob(get_random_value_hex(64))
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key = get_random_value_hex(31)
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try:
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Cryptographer.encrypt(blob, key)
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assert False
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except ValueError:
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assert True
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def test_encrypt():
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blob = Blob(data)
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assert Cryptographer.encrypt(blob, key) == encrypted_data
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def test_decrypt_invalid_tag():
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random_key = get_random_value_hex(32)
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random_encrypted_data = get_random_value_hex(64)
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random_encrypted_blob = EncryptedBlob(random_encrypted_data)
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# Trying to decrypt random data should result in an InvalidTag exception. Our decrypt function
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# returns None
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hex_tx = Cryptographer.decrypt(random_encrypted_blob, random_key)
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assert hex_tx is None
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def test_decrypt_odd_length_data():
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random_key = get_random_value_hex(32)
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random_encrypted_data_odd = get_random_value_hex(64)[:-1]
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random_encrypted_blob_odd = EncryptedBlob(random_encrypted_data_odd)
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try:
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Cryptographer.decrypt(random_encrypted_blob_odd, random_key)
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assert False
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except ValueError:
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assert True
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def test_decrypt_wrong_key_size():
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random_key = get_random_value_hex(31)
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random_encrypted_data_odd = get_random_value_hex(64)
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random_encrypted_blob_odd = EncryptedBlob(random_encrypted_data_odd)
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try:
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Cryptographer.decrypt(random_encrypted_blob_odd, random_key)
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assert False
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except ValueError:
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assert True
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def test_decrypt():
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# Valid data should run with no InvalidTag and verify
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assert Cryptographer.decrypt(EncryptedBlob(encrypted_data), key) == data
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def test_load_key_file():
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dummy_sk = ec.generate_private_key(ec.SECP256K1, default_backend())
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dummy_sk_der = dummy_sk.private_bytes(
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encoding=serialization.Encoding.DER,
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format=serialization.PrivateFormat.TraditionalOpenSSL,
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encryption_algorithm=serialization.NoEncryption(),
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)
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# If file exists and has data in it, function should work.
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with open("key_test_file", "wb") as f:
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f.write(dummy_sk_der)
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appt_data = Cryptographer.load_key_file("key_test_file")
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assert appt_data
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os.remove("key_test_file")
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# If file doesn't exist, function should return None
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assert Cryptographer.load_key_file("nonexistent_file") is None
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# If something that's not a file_path is passed as parameter the method should also return None
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assert Cryptographer.load_key_file(0) is None and Cryptographer.load_key_file(None) is None
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def test_load_private_key_der():
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# load_private_key_der expects a byte encoded data. Any other should fail and return None
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for wtype in WRONG_TYPES:
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assert Cryptographer.load_private_key_der(wtype) is None
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# On the other hand, any random formatter byte array would also fail (zeros for example)
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assert Cryptographer.load_private_key_der(bytes(32)) is None
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# A proper formatted key should load
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sk_der = generate_keypair()[0].to_der()
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assert Cryptographer.load_private_key_der(sk_der) is not None
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def test_sign():
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# Otherwise we should get a signature
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sk, _ = generate_keypair()
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message = b""
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assert Cryptographer.sign(message, sk) is not None
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assert isinstance(Cryptographer.sign(message, sk), str)
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def test_sign_ground_truth():
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# Generate a signature that has been verified by c-lightning.
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raw_sk = "24e9a981580d27d9277071a8381542e89a7c124868c4e862a13595dc75c6922f"
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sk = PrivateKey.from_hex(raw_sk)
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c_lightning_rpk = "0235293db86c6aaa74aff69ebacad8471d5242901ea9f6a0341a8dca331875e62c"
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message = b"Test message"
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sig = Cryptographer.sign(message, sk)
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rpk = Cryptographer.recover_pk(message, sig)
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assert Cryptographer.verify_rpk(PublicKey(unhexlify(c_lightning_rpk)), rpk)
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def test_sign_wrong_sk():
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# If a sk is not passed, sign will return None
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for wtype in WRONG_TYPES:
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assert Cryptographer.sign(b"", wtype) is None
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def test_recover_pk():
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sk, _ = generate_keypair()
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message = b"Test message"
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zbase32_sig = Cryptographer.sign(message, sk)
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rpk = Cryptographer.recover_pk(message, zbase32_sig)
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assert isinstance(rpk, PublicKey)
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def test_recover_pk_ground_truth():
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# Use a message a signature generated by c-lightning and see if we recover the proper key
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message = b"Test message"
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org_pk = "02b821c749295d5c24f6166ae77d8353eaa36fc4e47326670c6d2522cbd344bab9"
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zsig = "rbwewwyr4zem3w5t39fd1xyeamfzbmfgztwm4b613ybjtmoeod5kazaxqo3akn3ae75bqi3aqeds8cs6n43w4p58ft34itjnnb61bp54"
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rpk = Cryptographer.recover_pk(message, zsig)
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assert Cryptographer.verify_rpk(PublicKey(unhexlify(org_pk)), rpk)
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def test_recover_pk_wrong_inputs():
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str_message = "Test message"
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message = bytes(20)
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str_sig = "aaaaaaaa"
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sig = bytes(20)
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# Wrong input type
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assert Cryptographer.recover_pk(message, str_sig) is None
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assert Cryptographer.recover_pk(str_message, str_sig) is None
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assert Cryptographer.recover_pk(str_message, sig) is None
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assert Cryptographer.recover_pk(message, str_sig) is None
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# Wrong input size or format
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assert Cryptographer.recover_pk(message, sig) is None
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assert Cryptographer.recover_pk(message, bytes(104)) is None
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def test_verify_pk():
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sk, _ = generate_keypair()
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message = b"Test message"
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zbase32_sig = Cryptographer.sign(message, sk)
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rpk = Cryptographer.recover_pk(message, zbase32_sig)
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assert Cryptographer.verify_rpk(sk.public_key, rpk)
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def test_verify_pk_wrong():
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sk, _ = generate_keypair()
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sk2, _ = generate_keypair()
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message = b"Test message"
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zbase32_sig = Cryptographer.sign(message, sk)
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rpk = Cryptographer.recover_pk(message, zbase32_sig)
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assert not Cryptographer.verify_rpk(sk2.public_key, rpk)
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