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1Key
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import base64 | |
import getpass | |
from cryptography.fernet import Fernet | |
BLOCK_SIZE = 32 | |
# the character used for padding--with a block cipher such as AES, the value | |
# you encrypt must be a multiple of BLOCK_SIZE in length. This character is | |
# used to ensure that your value is always a multiple of BLOCK_SIZE | |
PADDING = b'{' | |
# one-liner to sufficiently pad the text to be encrypted | |
pad = lambda s: s + (BLOCK_SIZE - len(s) % BLOCK_SIZE) * PADDING | |
class Cipher(object): | |
def __init__(self, key): | |
self.bs = 32 | |
self.key = pad(key) | |
self.cipher = Fernet(base64.urlsafe_b64encode(self.key)) | |
def encrypt(self, raw): | |
return self.cipher.encrypt(raw) | |
def decrypt(self, raw): | |
return self.cipher.decrypt(raw) | |
def test(self, raw): | |
print("result: ", self.encrypt(raw)) | |
assert self.encrypt(raw), self.decrypt(raw) | |
if __name__ == '__main__': | |
#key = getpass.getpass("Key:") | |
key = "This is a key" | |
cipher = Cipher(bytes(key, "utf-8")) | |
cipher.test(b"This is a test") |
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cryptography==2.3.1 |
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