diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/hazmat/primitives/symmetric-encryption.rst | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst index 2f390175..ef6f0871 100644 --- a/docs/hazmat/primitives/symmetric-encryption.rst +++ b/docs/hazmat/primitives/symmetric-encryption.rst @@ -12,9 +12,6 @@ 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 @@ -37,6 +34,8 @@ 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 + >>> backend = default_backend() >>> cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=backend) >>> encryptor = cipher.encryptor() >>> ct = encryptor.update(b"a secret message") + encryptor.finalize() @@ -230,8 +229,9 @@ Weak Ciphers .. doctest:: >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes + >>> from cryptography.hazmat.bindings import default_backend >>> algorithm = algorithms.ARC4(key) - >>> cipher = Cipher(algorithm, mode=None, backend=backend) + >>> cipher = Cipher(algorithm, mode=None, backend=default_backend()) >>> encryptor = cipher.encryptor() >>> ct = encryptor.update(b"a secret message") >>> decryptor = cipher.decryptor() @@ -356,7 +356,8 @@ Modes .. doctest:: >>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes - >>> cipher = Cipher(algorithms.AES(key), modes.GCM(iv), backend) + >>> from cryptography.hazmat.bindings 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") >>> ct = encryptor.update(b"a secret message") + encryptor.finalize() |