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2007-10-11[CRYPTO] blkcipher: Added blkcipher_walk_virt_blockHerbert Xu1-10/+24
This patch adds the helper blkcipher_walk_virt_block which is similar to blkcipher_walk_virt but uses a supplied block size instead of the block size of the block cipher. This is useful for CTR where the block size is 1 but we still want to walk by the block size of the underlying cipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-10-11[CRYPTO] blkcipher: Increase kmalloc amount to aligned block sizeHerbert Xu1-1/+1
Now that the block size is no longer a multiple of the alignment, we need to increase the kmalloc amount in blkcipher_next_slow to use the aligned block size. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-10-11[CRYPTO] blkcipher: Remove alignment restriction on block sizeHerbert Xu1-5/+8
Previously we assumed for convenience that the block size is a multiple of the algorithm's required alignment. With the pending addition of CTR this will no longer be the case as the block size will be 1 due to it being a stream cipher. However, the alignment requirement will be that of the underlying implementation which will most likely be greater than 1. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-10-11[CRYPTO] blkcipher: Use max() in blkcipher_get_spot() to state the intentionIngo Oeser1-1/+1
Use max in blkcipher_get_spot() instead of open coding it. Signed-off-by: Ingo Oeser <ioe-lkml@rameria.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-10-11[CRYPTO] api: Add missing headers for setkey_unalignedHerbert Xu1-3/+3
This patch ensures that kernel.h and slab.h are included for the setkey_unaligned function. It also breaks a couple of long lines. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-10[CRYPTO] blkcipher: Fix inverted test in blkcipher_get_spotHerbert Xu1-1/+1
The previous patch had the conditional inverted. This patch fixes it so that we return the original position if it does not straddle a page. Thanks to Bob Gilligan for spotting this. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-09[CRYPTO] blkcipher: Fix handling of kmalloc page straddlingHerbert Xu1-4/+7
The function blkcipher_get_spot tries to return a buffer of the specified length that does not straddle a page. It has an off-by-one bug so it may advance a page unnecessarily. What's worse, one of its callers doesn't provide a buffer that's sufficiently long for this operation. This patch fixes both problems. Thanks to Bob Gilligan for diagnosing this problem and providing a fix. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-08-06[CRYPTO] api: fix writting into unallocated memory in setkey_alignedSebastian Siewior1-1/+1
setkey_unaligned() commited in ca7c39385ce1a7b44894a4b225a4608624e90730 overwrites unallocated memory in the following memset() because I used the wrong buffer length. Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-07-11[CRYPTO] api: Handle unaligned keys in setkeySebastian Siewior1-0/+25
setkey() in {cipher,blkcipher,ablkcipher,hash}.c does not respect the requested alignment by the algorithm. This patch fixes it. The extra memory is allocated by kmalloc() with GFP_ATOMIC flag. Signed-off-by: Sebastian Siewior <linux-crypto@ml.breakpoint.cc> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-05-02[CRYPTO] api: Add async block cipher interfaceHerbert Xu1-5/+65
This patch adds the frontend interface for asynchronous block ciphers. In addition to the usual block cipher parameters, there is a callback function pointer and a data pointer. The callback will be invoked only if the encrypt/decrypt handlers return -EINPROGRESS. In other words, if the return value of zero the completion handler (or the equivalent code) needs to be invoked by the caller. The request structure is allocated and freed by the caller. Its size is determined by calling crypto_ablkcipher_reqsize(). The helpers ablkcipher_request_alloc/ablkcipher_request_free can be used to manage the memory for a request. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-05-02[CRYPTO] api: Proc functions should be marked as unusedHerbert Xu1-1/+1
The proc functions were incorrectly marked as used rather than unused. They may be unused if proc is disabled. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-02-07[CRYPTO] api: Allow multiple frontends per backendHerbert Xu1-2/+3
This patch adds support for multiple frontend types for each backend algorithm by passing the type and mask through to the backend type init function. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-02-07[CRYPTO] all: Check for usage in hard IRQ contextHerbert Xu1-0/+4
Using blkcipher/hash crypto operations in hard IRQ context can lead to random memory corruption due to the reuse of kmap_atomic slots. Since crypto operations were never meant to be used in hard IRQ contexts, this patch checks for such usage and returns an error before kmap_atomic is performed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-12-13[PATCH] uml problems with linux/io.hAl Viro1-1/+0
Remove useless includes of linux/io.h, don't even try to build iomap_copy on uml (it doesn't have readb() et.al., so...) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-21[CRYPTO] cipher: Added block cipher typeHerbert Xu1-0/+405
This patch adds the new type of block ciphers. Unlike current cipher algorithms which operate on a single block at a time, block ciphers operate on an arbitrarily long linear area of data. As it is block-based, it will skip any data remaining at the end which cannot form a block. The block cipher has one major difference when compared to the existing block cipher implementation. The sg walking is now performed by the algorithm rather than the cipher mid-layer. This is needed for drivers that directly support sg lists. It also improves performance for all algorithms as it reduces the total number of indirect calls by one. In future the existing cipher algorithm will be converted to only have a single-block interface. This will be done after all existing users have switched over to the new block cipher type. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>