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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2018-09-20 14:18:39 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-09-28 12:46:26 +0800 |
| commit | e497c51896b3babfb14a36e497fd36a15f56cfa4 (patch) | |
| tree | f8f77c55ceea579c373c7b08c15ebfdbb714771e /crypto/Kconfig | |
| parent | 95ba597367ddc26c1062c7ee9697c9aee53d04d0 (diff) | |
| download | linux-e497c51896b3babfb14a36e497fd36a15f56cfa4.tar.bz2 | |
crypto: ofb - add output feedback mode
Add a generic version of output feedback mode. We already have support of
several hardware based transformations of this mode and the needed test
vectors but we somehow missed adding a generic software one. Fix this now.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 4ef95b0b25a3..63ef279322d2 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -456,6 +456,18 @@ config CRYPTO_LRW The first 128, 192 or 256 bits in the key are used for AES and the rest is used to tie each cipher block to its logical position. +config CRYPTO_OFB + tristate "OFB support" + select CRYPTO_BLKCIPHER + select CRYPTO_MANAGER + help + OFB: the Output Feedback mode makes a block cipher into a synchronous + stream cipher. It generates keystream blocks, which are then XORed + with the plaintext blocks to get the ciphertext. Flipping a bit in the + ciphertext produces a flipped bit in the plaintext at the same + location. This property allows many error correcting codes to function + normally even when applied before encryption. + config CRYPTO_PCBC tristate "PCBC support" select CRYPTO_BLKCIPHER |