crypto.py

# pip install pycryptodome
# pip install cryptography
from Crypto.Cipher import AES
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import padding


# Encrypt using AES-GCM and return just the ciphertext (Hint: https://pycryptodome.readthedocs.io/en/latest/src/cipher/modern.html#gcm-mode)
def encrypt(text, key, iv):
    pass

# Sign using the RSA signature (Hint: use the example in the documentation "https://cryptography.io/en/latest/hazmat/primitives/asymmetric/rsa/")
def sign(message, privatekey):
    pass

# Validate the above signature. Return True if valid and False if not
def validate(message, signature, publickey):
    pass


# In TLS, we will need to encrypt a series of messages with only slight changes between encryptions
# Create an array of length 10 where the ith value is encrypted with iv ^ i rather than iv
# But the text and key stay the same (feel free to use your encrypt function)
def special_encrypt(text, key, iv):
    pass