Fix tests that use non-public sslib module

Signed-off-by: Lukas Puehringer <[email protected]>

tests/test_repository_lib.py

@@ -52,6 +52,7 @@
 import tuf.repository_tool as repo_tool
 
 import securesystemslib
+import securesystemslib.rsa_keys
 import securesystemslib.interface
 import six
 
@@ -173,10 +174,10 @@ def test_import_ed25519_privatekey_from_file(self):
     # Invalid private key imported (contains unexpected keytype.)
     imported_ed25519_key['keytype'] = 'invalid_keytype'
 
-    # Use 'pyca_crypto_keys.py' to bypass the key format validation performed by
+    # Use 'rsa_keys.py' to bypass the key format validation performed by
     # 'keys.py'.
     salt, iterations, derived_key = \
-      securesystemslib.pyca_crypto_keys._generate_derived_key('pw')
+        securesystemslib.rsa_keys._generate_derived_key('pw')
 
     # Store the derived key info in a dictionary, the object expected
     # by the non-public _encrypt() routine.
@@ -185,8 +186,7 @@ def test_import_ed25519_privatekey_from_file(self):
 
     # Convert the key object to json string format and encrypt it with the
     # derived key.
-    encrypted_key = \
-      securesystemslib.pyca_crypto_keys._encrypt(
+    encrypted_key = securesystemslib.rsa_keys._encrypt(
           json.dumps(imported_ed25519_key), derived_key_information)
 
     with open(ed25519_keypath, 'wb') as file_object: