Add more contrains to load_keys and updates unit tests

apps/cli/teos_cli.py

@@ -39,24 +39,39 @@ def load_keys(teos_pk_path, cli_sk_path, cli_pk_path):
         encoded key if all keys can be loaded. ``None`` otherwise.
     """
 
-    teos_pk_der = Cryptographer.load_key_file(teos_pk_path)
-    teos_pk = PublicKey(teos_pk_der)
-
-    if teos_pk is None:
+    if teos_pk_path is None:
         logger.error("TEOS's public key file not found. Please check your settings")
         return None
 
+    if cli_sk_path is None:
+        logger.error("Client's private key file not found. Please check your settings")
+        return None
+
+    if cli_pk_path is None:
+        logger.error("Client's public key file not found. Please check your settings")
+        return None
+
+    try:
+        teos_pk_der = Cryptographer.load_key_file(teos_pk_path)
+        teos_pk = PublicKey(teos_pk_der)
+
+    except ValueError:
+        logger.error("TEOS public key is invalid or cannot be parsed")
+        return None
+
     cli_sk_der = Cryptographer.load_key_file(cli_sk_path)
     cli_sk = Cryptographer.load_private_key_der(cli_sk_der)
 
     if cli_sk is None:
-        logger.error("Client's private key file not found. Please check your settings")
+        logger.error("Client private key is invalid or cannot be parsed")
         return None
 
-    cli_pk_der = Cryptographer.load_key_file(cli_pk_path)
+    try:
+        cli_pk_der = Cryptographer.load_key_file(cli_pk_path)
+        PublicKey(cli_pk_der)
 
-    if cli_pk_der is None:
-        logger.error("Client's public key file not found. Please check your settings")
+    except ValueError:
+        logger.error("Client public key is invalid or cannot be parsed")
         return None
 
     return teos_pk, cli_sk, cli_pk_der

test/apps/cli/unit/test_teos_cli.py

@@ -52,8 +52,7 @@ dummy_appointment = Appointment.from_dict(dummy_appointment_full)
 
 
 def load_dummy_keys(*args):
-    # return dummy_pk, dummy_sk, dummy_pk_der
-    return dummy_pk
+    return dummy_pk, dummy_sk, dummy_pk.format(compressed=True)
 
 
 def get_dummy_signature(*args):
@@ -64,30 +63,39 @@ def get_bad_signature(*args):
     return Cryptographer.sign(dummy_appointment.serialize(), another_sk)
 
 
-# def test_load_keys():
-#     # Let's first create a private key and public key files
-#     private_key_file_path = "sk_test_file"
-#     public_key_file_path = "pk_test_file"
-#     with open(private_key_file_path, "wb") as f:
-#         f.write(dummy_sk.to_der())
-#     with open(public_key_file_path, "wb") as f:
-#         f.write(dummy_pk_der)
-#
-#     # Now we can test the function passing the using this files (we'll use the same pk for both)
-#     r = teos_cli.load_keys(public_key_file_path, private_key_file_path, public_key_file_path)
-#     assert isinstance(r, tuple)
-#     assert len(r) == 3
-#
-#     # If any param does not match we should get None as result
-#     assert teos_cli.load_keys(None, private_key_file_path, public_key_file_path) is None
-#     assert teos_cli.load_keys(public_key_file_path, None, public_key_file_path) is None
-#     assert teos_cli.load_keys(public_key_file_path, private_key_file_path, None) is None
-#
-#     # The same should happen if we pass a public key where a private should be, for instance
-#     assert teos_cli.load_keys(private_key_file_path, public_key_file_path, private_key_file_path) is None
-#
-#     os.remove(private_key_file_path)
-#     os.remove(public_key_file_path)
+def test_load_keys():
+    # Let's first create a private key and public key files
+    private_key_file_path = "sk_test_file"
+    public_key_file_path = "pk_test_file"
+    empty_file_path = "empty_file"
+    with open(private_key_file_path, "wb") as f:
+        f.write(dummy_sk.to_der())
+    with open(public_key_file_path, "wb") as f:
+        f.write(dummy_pk.format(compressed=True))
+    with open(empty_file_path, "wb") as f:
+        pass
+
+    # Now we can test the function passing the using this files (we'll use the same pk for both)
+    r = teos_cli.load_keys(public_key_file_path, private_key_file_path, public_key_file_path)
+    assert isinstance(r, tuple)
+    assert len(r) == 3
+
+    # If any param does not match we should get None as result
+    assert teos_cli.load_keys(None, private_key_file_path, public_key_file_path) is None
+    assert teos_cli.load_keys(public_key_file_path, None, public_key_file_path) is None
+    assert teos_cli.load_keys(public_key_file_path, private_key_file_path, None) is None
+
+    # The same should happen if we pass a public key where a private should be, for instance
+    assert teos_cli.load_keys(private_key_file_path, public_key_file_path, private_key_file_path) is None
+
+    # Same if any of the files is empty
+    assert teos_cli.load_keys(empty_file_path, private_key_file_path, public_key_file_path) is None
+    assert teos_cli.load_keys(public_key_file_path, empty_file_path, public_key_file_path) is None
+    assert teos_cli.load_keys(public_key_file_path, private_key_file_path, empty_file_path) is None
+
+    os.remove(private_key_file_path)
+    os.remove(public_key_file_path)
+    os.remove(empty_file_path)
 
 
 # TODO: 90-add-more-add-appointment-tests