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* crypto: eseqiv - Fix IV generation for sync algorithmsSteffen Klassert2009-04-151-1/+2
| | | | | | | | | | | | If crypto_ablkcipher_encrypt() returns synchronous, eseqiv_complete2() is called even if req->giv is already the pointer to the generated IV. The generated IV is overwritten with some random data in this case. This patch fixes this by calling eseqiv_complete2() just if the generated IV has to be copied to req->giv. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - Use RNG interface instead of get_random_bytesHerbert Xu2008-08-291-4/+21
| | | | | | | This patch makes the IV generators use the new RNG interface so that the user can pick an RNG other than the default get_random_bytes. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - Move IV generators into their own modulesHerbert Xu2008-08-291-2/+8
| | | | | | | | This patch moves the default IV generators into their own modules in order to break a dependency loop between cryptomgr, rng, and blkcipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] eseqiv: Fix off-by-one encryptionHerbert Xu2008-05-011-1/+2
| | | | | | | | | | | After attaching the IV to the head during encryption, eseqiv does not increase the encryption length by that amount. As such the last block of the actual plain text will be left unencrypted. Fortunately the only user of this code hifn currently crashes so this shouldn't affect anyone :) Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Fix section mismatchesHerbert Xu2008-03-081-2/+0
| | | | | | | | The previous patch to move chainiv and eseqiv into blkcipher created a section mismatch for the chainiv exit function which was also called from __init. This patch removes the __exit marking on it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Move chainiv/seqiv into crypto_blkcipher moduleHerbert Xu2008-02-231-8/+4
| | | | | | | | For compatibility with dm-crypt initramfs setups it is useful to merge chainiv/seqiv into the crypto_blkcipher module. Since they're required by most algorithms anyway this is an acceptable trade-off. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] eseqiv: Add Encrypted Sequence Number IV GeneratorHerbert Xu2008-01-111-0/+264
This generator generates an IV based on a sequence number by xoring it with a salt and then encrypting it with the same key as used to encrypt the plain text. This algorithm requires that the block size be equal to the IV size. It is mainly useful for CBC. It has one noteworthy property that for IPsec the IV happens to lie just before the plain text so the IV generation simply increases the number of encrypted blocks by one. Therefore the cost of this generator is entirely dependent on the speed of the underlying cipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>