diff options
| -rw-r--r-- | lib/Crypto/Util/Counter.py | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/Crypto/Util/Counter.py b/lib/Crypto/Util/Counter.py index 5a6fd77..eeff93c 100644 --- a/lib/Crypto/Util/Counter.py +++ b/lib/Crypto/Util/Counter.py @@ -43,12 +43,14 @@ An example of usage is the following: >>> from Crypto.Cipher import AES >>> from Crypto.Util import Counter + >>> from Crypto import Random >>> - >>> pt = b'X'*1000000 - >>> ctr = Counter.new(128) + >>> nonce = Random.get_random_bytes(8) + >>> ctr = Counter.new(64, nonce) >>> key = b'AES-128 symm key' + >>> plaintext = b'X'*1000000 >>> cipher = AES.new(key, AES.MODE_CTR, counter=ctr) - >>> ct = cipher.encrypt(pt) + >>> ciphertext = cipher.encrypt(plaintext) :undocumented: __package__ """ @@ -70,7 +72,7 @@ def new(nbits, prefix=b(""), suffix=b(""), initial_value=1, overflow=0, little_e Each call to the function returns the next counter block. Each counter block is made up by three parts:: - + prefix || counter value || postfix The counter value is incremented by 1 at each call. |