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import binascii | |
import hashlib | |
import json | |
from cryptography.hazmat.backends import default_backend | |
from cryptography.hazmat.primitives.ciphers import algorithms, Cipher, modes | |
from django.conf import settings | |
from pinecast.helpers import gravatar | |
def get_canny_token(req): | |
if not req.user: | |
return None | |
user_data = { | |
'avatarURL': gravatar(req.user.email), | |
'email': req.user.email, | |
'id': req.user.id, | |
'name': req.user.email, | |
} | |
plaintext = json.dumps(user_data) | |
dig = hashlib.md5(settings.CANNY_SSO_KEY.encode('utf-8')).digest() | |
cipher = Cipher(algorithms.AES(dig), modes.ECB(), backend=default_backend()) | |
encryptor = cipher.encryptor() | |
padding_required = 16 - len(plaintext) % 16 | |
encoded = plaintext.encode('utf-8') + padding_required * bytes([padding_required]) | |
ciphertext = encryptor.update(encoded) + encryptor.finalize() | |
return binascii.hexlify(ciphertext).decode('utf-8') |
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