diff options
Diffstat (limited to 'docs/hazmat/primitives/symmetric-encryption.rst')
| -rw-r--r-- | docs/hazmat/primitives/symmetric-encryption.rst | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst index ef6f0871..f4d0457a 100644 --- a/docs/hazmat/primitives/symmetric-encryption.rst +++ b/docs/hazmat/primitives/symmetric-encryption.rst @@ -34,7 +34,7 @@ an "encrypt-then-MAC" formulation as `described by Colin Percival`_. .. doctest:: >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes - >>> from cryptography.hazmat.bindings import default_backend + >>> from cryptography.hazmat.backends import default_backend >>> backend = default_backend() >>> cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=backend) >>> encryptor = cipher.encryptor() @@ -51,7 +51,7 @@ an "encrypt-then-MAC" formulation as `described by Colin Percival`_. provider such as those described :ref:`below <symmetric-encryption-modes>`. :param backend: A - :class:`~cryptography.hazmat.bindings.interfaces.CipherBackend` + :class:`~cryptography.hazmat.backends.interfaces.CipherBackend` provider. .. method:: encryptor() @@ -229,7 +229,7 @@ Weak Ciphers .. doctest:: >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes - >>> from cryptography.hazmat.bindings import default_backend + >>> from cryptography.hazmat.backends import default_backend >>> algorithm = algorithms.ARC4(key) >>> cipher = Cipher(algorithm, mode=None, backend=default_backend()) >>> encryptor = cipher.encryptor() @@ -266,16 +266,18 @@ Modes A good construction looks like: - .. code-block:: pycon + .. doctest:: >>> import os + >>> from cryptography.hazmat.primitives.ciphers.modes import CBC >>> iv = os.urandom(16) >>> mode = CBC(iv) While the following is bad and will leak information: - .. code-block:: pycon + .. doctest:: + >>> from cryptography.hazmat.primitives.ciphers.modes import CBC >>> iv = "a" * 16 >>> mode = CBC(iv) @@ -356,7 +358,7 @@ Modes .. doctest:: >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes - >>> from cryptography.hazmat.bindings import default_backend + >>> from cryptography.hazmat.backends import default_backend >>> cipher = Cipher(algorithms.AES(key), modes.GCM(iv), backend=default_backend()) >>> encryptor = cipher.encryptor() >>> encryptor.authenticate_additional_data(b"authenticated but not encrypted payload") |