diff options
Diffstat (limited to 'docs/hazmat/primitives/symmetric-encryption.rst')
| -rw-r--r-- | docs/hazmat/primitives/symmetric-encryption.rst | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst index eef359d6..42d2090c 100644 --- a/docs/hazmat/primitives/symmetric-encryption.rst +++ b/docs/hazmat/primitives/symmetric-encryption.rst @@ -12,6 +12,9 @@ Symmetric Encryption key = binascii.unhexlify(b"0" * 32) iv = binascii.unhexlify(b"0" * 32) + from cryptography.hazmat.bindings import default_backend + backend = default_backend() + Symmetric encryption is a way to encrypt (hide the plaintext value) material where the sender and receiver both use the same key. Note that symmetric @@ -22,7 +25,7 @@ For this reason it is *strongly* recommended to combine encryption with a message authentication code, such as :doc:`HMAC </hazmat/primitives/hmac>`, in an "encrypt-then-MAC" formulation as `described by Colin Percival`_. -.. class:: Cipher(algorithm, mode) +.. class:: Cipher(algorithm, mode, backend) Cipher objects combine an algorithm (such as :class:`~cryptography.hazmat.primitives.ciphers.algorithms.AES`) with a @@ -33,8 +36,8 @@ an "encrypt-then-MAC" formulation as `described by Colin Percival`_. .. doctest:: - >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes - >>> cipher = Cipher(algorithms.AES(key), modes.CBC(iv)) + >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, mode + >>> cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend) >>> encryptor = cipher.encryptor() >>> ct = encryptor.update(b"a secret message") + encryptor.finalize() >>> decryptor = cipher.decryptor() |