/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/ is in python3-crypto 2.6.1-8ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/__init__.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/common.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_AES.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_ARC2.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_ARC4.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_Blowfish.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_CAST.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_DES.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_DES3.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_XOR.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_pkcs1_15.py
/usr/lib/python3/dist-packages/Crypto/SelfTest/Cipher/test_pkcs1_oaep.py