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bb270f0 75e148e bb270f0 75e148e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | import hashlib
from cryptography.fernet import Fernet
from dotenv import load_dotenv
import os
load_dotenv()
FERNET_KEY = os.getenv("FERNET_KEY")
fernet = Fernet(FERNET_KEY)
def hash_string(input_string: str) -> str:
"""Returns a SHA-256 hash of the input string (lowercase)"""
return hashlib.sha256(input_string.lower().encode()).hexdigest()
def encode_symm_crypt_key(input_string: str) -> str:
"""Encodes a string into a symmetric encryption key using Fernet"""
return fernet.encrypt(input_string.encode()).decode()
def decode_symm_crypt_key(encoded_string: str) -> str:
"""Decodes a symmetric encryption key using Fernet"""
return fernet.decrypt(encoded_string.encode()).decode()
def encode_multiple_strings_sck(strings: list) -> list:
"""Encodes a list of strings into symmetric encryption keys"""
return [encode_symm_crypt_key(s) for s in strings]
def decode_multiple_strings_sck(encoded_strings: list) -> list:
"""Decodes a list of symmetric encryption keys back into strings"""
return [decode_symm_crypt_key(s) for s in encoded_strings]
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