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- def encrypt_key(key, nonce, data):
- """ use "key" and "nonce" to generate a one time key and en-/decrypt
- "data" with the one time key.
- Args
- key: encryption key
- nounce: exactly once used string (try a time-based UUID)
- data: the encrypted data
- Returns
- ciphertext: AES256 encrypted data
- """
- key = clean_string(key)
- key = SHA256d(key).digest()
- nonce_hash = SHA256d(nonce).digest()# assert 32 bytes key
- enc_key = aes(key, nonce_hash) # generate encryption key
- return aes(enc_key, data)
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