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| author | Donald Stufft <donald@stufft.io> | 2013-09-10 20:24:20 -0700 |
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| committer | Donald Stufft <donald@stufft.io> | 2013-09-10 20:24:20 -0700 |
| commit | 9287c2344c6c91ad838a251d3b6fde2a6ea88b56 (patch) | |
| tree | ee0d0161e0b8856385e0762653f610b2f36bc851 /docs | |
| parent | a672bbe6226648c68cdb628b5b7d67f2e8270698 (diff) | |
| parent | c507412ec09e6fa502fbd8587824901e1cf9a935 (diff) | |
| download | cryptography-9287c2344c6c91ad838a251d3b6fde2a6ea88b56.tar.gz cryptography-9287c2344c6c91ad838a251d3b6fde2a6ea88b56.tar.bz2 cryptography-9287c2344c6c91ad838a251d3b6fde2a6ea88b56.zip | |
Merge pull request #57 from reaperhulk/ofb-support
Output feedback mode support + test vectors (aes)
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/primitives/symmetric-encryption.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/primitives/symmetric-encryption.rst b/docs/primitives/symmetric-encryption.rst index f028c755..c4f78a79 100644 --- a/docs/primitives/symmetric-encryption.rst +++ b/docs/primitives/symmetric-encryption.rst @@ -68,6 +68,17 @@ Modes reuse an ``initialization_vector`` with a given ``key``. +.. class:: cryptography.primitives.block.modes.OFB(nonce) + + OFB (Output Feedback) is a mode of operation for block ciphers. It + transforms a block cipher into a stream cipher. + + :param bytes nonce: Must be random bytes. They do not need to be kept + secret (they can be included in a transmitted message). + Must be the same number of bytes as the ``block_size`` + of the cipher. Reuse of a ``nonce`` with a given + ``key`` can allow recovery of the original plaintext. + Insecure Modes -------------- |