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* crypto: user - Fix lookup of algorithms with IV generatorSteffen Klassert2012-03-291-2/+2
| | | | | | | | | | | | We lookup algorithms with crypto_alg_mod_lookup() when instantiating via crypto_add_alg(). However, algorithms that are wrapped by an IV genearator (e.g. aead or genicv type algorithms) need special care. The userspace process hangs until it gets a timeout when we use crypto_alg_mod_lookup() to lookup these algorithms. So export the lookup functions for these algorithms and use them in crypto_add_alg(). Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: algapi - Fix build problem with NET disabledHerbert Xu2011-11-111-0/+14
| | | | | | | | The report functions use NLA_PUT so we need to ensure that NET is enabled. Reported-by: Luis Henriques <henrix@camandro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: Add userspace report for givcipher type algorithmsSteffen Klassert2011-10-211-0/+23
| | | | | Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: Add userspace report for ablkcipher type algorithmsSteffen Klassert2011-10-211-0/+25
| | | | | Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - remove redundant NULL checkDavidlohr Bueso2011-01-291-2/+1
| | | | | | Signed-off-by: Davidlohr Bueso <dave@gnu.org> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - avoid NULL dereferenceJiri Slaby2010-06-231-1/+1
| | | | | | | | | | Stanse found a potential NULL dereference in ablkcipher_next_slow. Even though kmalloc fails, its retval is dereferenced later. Return from that function properly earlier. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - Add ablkcipher_walk interfacesDavid S. Miller2010-05-191-0/+277
| | | | | | | | | | | | | | | | | | | | | | These are akin to the blkcipher_walk helpers. The main differences in the async variant are: 1) Only physical walking is supported. We can't hold on to kmap mappings across the async operation to support virtual ablkcipher_walk operations anyways. 2) Bounce buffers used for async more need to be persistent and freed at a later point in time when the async op completes. Therefore we maintain a list of writeback buffers and require that the ablkcipher_walk user call the 'complete' operation so we can copy the bounce buffers out to the real buffers and free up the bounce buffer chunks. These interfaces will be used by the new Niagara2 crypto driver. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ablkcipher - Fix checkpatch errorsRichard Hartmann2010-02-161-2/+2
| | | | | Signed-off-by: Richard Hartmann <richih.mailinglist@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: blkcipher - Do not use eseqiv on stream ciphersHerbert Xu2009-08-141-0/+6
| | | | | | | | | | | | Recently we switched to using eseqiv on SMP machines in preference over chainiv. However, eseqiv does not support stream ciphers so they should still default to chainiv. This patch applies the same check as done by eseqiv to weed out the stream ciphers. In particular, all algorithms where the IV size is not equal to the block size will now default to chainiv. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - Change default sync geniv on SMP to eseqivHerbert Xu2009-06-251-1/+19
| | | | | | | | | | | | | | | | | As it stands we use chainiv for sync algorithms and eseqiv for async algorithms. However, when there is more than one CPU chainiv forces all processing to be serialised which is usually not what you want. Also, the added overhead of eseqiv isn't that great. Therefore this patch changes the default sync geniv on SMP machines to eseqiv. For the odd situation where the overhead is unacceptable then chainiv is still available as an option. Note that on UP machines chainiv is still preferred over eseqiv for sync algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - Fix request for sync algorithmsHerbert Xu2009-06-251-1/+2
| | | | | | | | | | | When a sync givcipher algorithm is requested, if an async version of the same algorithm already exists, then we will loop forever without ever constructing the sync version based on a blkcipher. This is because we did not include the requested type/mask when getting a larval for the geniv algorithm that is to be constructed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: skcipher - Avoid infinite loop when cipher fails selftestHerbert Xu2009-02-181-0/+19
| | | | | | | | | | | | | | | When an skcipher constructed through crypto_givcipher_default fails its selftest, we'll loop forever trying to construct new skcipher objects but failing because it already exists. The crux of the issue is that once a givcipher fails the selftest, we'll ignore it on the next run through crypto_skcipher_lookup and attempt to construct a new givcipher. We should instead return an error to the caller if we find a givcipher that has failed the test. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Move chainiv/seqiv into crypto_blkcipher moduleHerbert Xu2008-02-231-3/+0
| | | | | | | | 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] api: Show async typeHerbert Xu2008-01-111-0/+4
| | | | | | | This patch adds an async field to /proc/crypto for ablkcipher and aead algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Create default givcipher instancesHerbert Xu2008-01-111-1/+157
| | | | | | | | | | | | | | | This patch makes crypto_alloc_ablkcipher/crypto_grab_skcipher always return algorithms that are capable of generating their own IVs through givencrypt and givdecrypt. Each algorithm may specify its default IV generator through the geniv field. For algorithms that do not set the geniv field, the blkcipher layer will pick a default. Currently it's chainiv for synchronous algorithms and eseqiv for asynchronous algorithms. Note that if these wrappers do not work on an algorithm then that algorithm must specify its own geniv or it can't be used at all. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Add skcipher_geniv_alloc/skcipher_geniv_freeHerbert Xu2008-01-111-1/+9
| | | | | | | | This patch creates the infrastructure to help the construction of givcipher templates that wrap around existing blkcipher/ablkcipher algorithms by adding an IV generator to them. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Added geniv fieldHerbert Xu2008-01-111-0/+2
| | | | | | | | This patch introduces the geniv field which indicates the default IV generator for each algorithm. It should point to a string that is not freed as long as the algorithm is registered. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Add givcrypt operations and givcipher typeHerbert Xu2008-01-111-0/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Different block cipher modes have different requirements for intialisation vectors. For example, CBC can use a simple randomly generated IV while modes such as CTR must use an IV generation mechanisms that give a stronger guarantee on the lack of collisions. Furthermore, disk encryption modes have their own IV generation algorithms. Up until now IV generation has been left to the users of the symmetric key cipher API. This is inconvenient as the number of block cipher modes increase because the user needs to be aware of which mode is supposed to be paired with which IV generation algorithm. Therefore it makes sense to integrate the IV generation into the crypto API. This patch takes the first step in that direction by creating two new ablkcipher operations, givencrypt and givdecrypt that generates an IV before performing the actual encryption or decryption. The operations are currently not exposed to the user. That will be done once the underlying functionality has actually been implemented. It also creates the underlying givcipher type. Algorithms that directly generate IVs would use it instead of ablkcipher. All other algorithms (including all existing ones) would generate a givcipher algorithm upon registration. This givcipher algorithm will be constructed from the geniv string that's stored in every algorithm. That string will locate a template which is instantiated by the blkcipher/ablkcipher algorithm in question to give a givcipher algorithm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] skcipher: Add crypto_grab_skcipher interfaceHerbert Xu2008-01-111-2/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Note: From now on the collective of ablkcipher/blkcipher/givcipher will be known as skcipher, i.e., symmetric key cipher. The name blkcipher has always been much of a misnomer since it supports stream ciphers too. This patch adds the function crypto_grab_skcipher as a new way of getting an ablkcipher spawn. The problem is that previously we did this in two steps, first getting the algorithm and then calling crypto_init_spawn. This meant that each spawn user had to be aware of what type and mask to use for these two steps. This is difficult and also presents a problem when the type/mask changes as they're about to be for IV generators. The new interface does both steps together just like crypto_alloc_ablkcipher. As a side-effect this also allows us to be stronger on type enforcement for spawns. For now this is only done for ablkcipher but it's trivial to extend for other types. This patch also moves the type/mask logic for skcipher into the helpers crypto_skcipher_type and crypto_skcipher_mask. Finally this patch introduces the function crypto_require_sync to determine whether the user is specifically requesting a sync algorithm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] ablkcipher: Remove queue pointer from common alg objectHerbert Xu2007-10-101-4/+0
| | | | | | | | Since not everyone needs a queue pointer and those who need it can always get it from the context anyway the queue pointer in the common alg object is redundant. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] api: Add missing headers for setkey_unalignedHerbert Xu2007-10-101-1/+4
| | | | | | | | 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>
* [CRYPTO] api: fix writting into unallocated memory in setkey_alignedSebastian Siewior2007-08-061-1/+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>
* [CRYPTO] api: Allow ablkcipher with no queuesSebastian Siewior2007-07-111-2/+4
| | | | | | | | | Evgeniy's hifn driver and probably mine don't use ablkcipher->queue at all. The show method of ablkcipher will access this field without checking if it is valid. Signed-off-by: Sebastian Siewior <linux-crypto@ml.breakpoint.cc> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] api: Handle unaligned keys in setkeySebastian Siewior2007-07-111-0/+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>
* [CRYPTO] api: Add async blkcipher typeHerbert Xu2007-05-021-0/+83
This patch adds the mid-level interface for asynchronous block ciphers. It also includes a generic queueing mechanism that can be used by other asynchronous crypto operations in future. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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