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Add nonce and initial_value parameters to CTR mode

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Legrandin 2015-12-20 21:27:21 +01:00
parent 6fc0c734a2
commit c74b718aa6
13 changed files with 210 additions and 71 deletions
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10
lib/Crypto/Cipher/AES.py
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@ -172,7 +172,8 @@ def new(key, mode, *args, **kwargs):
For all other modes, it must be 16 bytes long.
nonce : byte string
(*Only* `MODE_CCM`, `MODE_EAX`, `MODE_GCM`, `MODE_SIV`, `MODE_OCB`).
(*Only* `MODE_CCM`, `MODE_EAX`, `MODE_GCM`, `MODE_SIV`, `MODE_OCB`,
`MODE_CTR`).
A mandatory value that must never be reused for any other encryption.
@ -184,10 +185,10 @@ def new(key, mode, *args, **kwargs):
For `MODE_OCB`, its length must be in the range ``[1..15]``.
It is recommended to use 15 bytes.
For `MODE_CTR`, its length must be in the range ``[0..15]``.
For the other modes, there are no restrictions on its length,
but it is recommended to use at least 16 bytes.
counter : object
(*Only* `MODE_CTR`). An object created by `Crypto.Util.Counter`.
segment_size : integer
(*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext
are segmented in.
@ -204,6 +205,9 @@ def new(key, mode, *args, **kwargs):
assoc_len : integer
(*Only* `MODE_CCM`). Length of the associated data.
If not specified, all data is internally buffered.
initial_value : integer
(*Only* `MODE_CTR`). The initial value for the counter within
the counter block. By default it is 0.
use_aesni : boolean
Use AES-NI if available.