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2009-07-14crypto: ahash - Add instance/spawn supportHerbert Xu1-0/+51
This patch adds support for creating ahash instances and using ahash as spawns. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14crypto: ahash - Convert to new style algorithmsHerbert Xu2-34/+86
This patch converts crypto_ahash to the new style. The old ahash algorithm type is retained until the existing ahash implementations are also converted. All ahash users will automatically get the new crypto_ahash type. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14crypto: api - Remove frontend argument from extsize/init_tfmHerbert Xu1-4/+2
As the extsize and init_tfm functions belong to the frontend the frontend argument is superfluous. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14crypto: ahash - Add crypto_ahash_set_reqsizeHerbert Xu1-0/+6
This patch adds the helper crypto_ahash_set_reqsize so that implementations do not directly access the crypto_ahash structure. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14crypto: shash - Export async functionsHerbert Xu1-0/+3
This patch exports the async functions so that they can be reused by cryptd when it switches over to using shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14crypto: shash - Make descsize a run-time attributeHerbert Xu2-2/+3
This patch changes descsize to a run-time attribute so that implementations can change it in their init functions. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-12crypto: async - Use kzfree for requestsHerbert Xu1-1/+1
This patch changes the kfree call to kzfree for async requests. As the request may contain sensitive data it needs to be zeroed before it can be reallocated by others. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-11crypto: sha256_generic - Add export/import supportHerbert Xu1-0/+6
This patch adds export/import support to sha256_generic. The exported type is defined by struct sha256_state, which is basically the entire descriptor state of sha256_generic. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-11crypto: sha1_generic - Add export/import supportHerbert Xu1-0/+8
This patch adds export/import support to sha1_generic. The exported type is defined by struct sha1_state, which is basically the entire descriptor state of sha1_generic. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-11crypto: shash - Export/import hash state onlyHerbert Xu1-4/+14
This patch replaces the full descriptor export with an export of the partial hash state. This allows the use of a consistent export format across all implementations of a given algorithm. This is useful because a number of cases require the use of the partial hash state, e.g., PadLock can use the SHA1 hash state to get around the fact that it can only hash contiguous data chunks. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-09crypto: shash - Add shash_instance_ctxHerbert Xu1-0/+5
This patch adds the helper shash_instance_ctx which is the shash analogue of crypto_instance_ctx. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: shash - Add __crypto_shash_castHerbert Xu1-0/+5
This patch adds __crypto_shash_cast which turns a crypto_tfm into crypto_shash. It's analogous to the other __crypto_*_cast functions. It hasn't been needed until now since no existing shash algorithms have had an init function. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: shash - Add crypto_shash_ctx_alignedHerbert Xu1-0/+5
This patch adds crypto_shash_ctx_aligned which will be needed by hmac after its conversion to shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: shash - Add shash_register_instanceHerbert Xu1-1/+2
This patch adds shash_register_instance so that shash instances can be registered without bypassing the shash checks applied to normal algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: shash - Add shash_attr_alg2 helperHerbert Xu1-0/+2
This patch adds the helper shash_attr_alg2 which locates a shash algorithm based on the information in the given attribute. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: api - Add crypto_attr_alg2 helperHerbert Xu1-1/+10
This patch adds the helper crypto_attr_alg2 which is similar to crypto_attr_alg but takes an extra frontend argument. This is intended to be used by new style algorithm types such as shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: shash - Add spawn supportHerbert Xu1-0/+14
This patch adds the functions needed to create and use shash spawns, i.e., to use shash algorithms in a template. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: api - Add new style spawn supportHerbert Xu1-0/+6
This patch modifies the spawn infrastructure to support new style algorithms like shash. In particular, this means storing the frontend type in the spawn and using crypto_create_tfm to allocate the tfm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-08crypto: shash - Add shash_instanceHerbert Xu1-0/+26
This patch adds shash_instance and the associated alloc/free functions. This is meant to be an instance that with a shash algorithm under it. Note that the instance itself doesn't have to be shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-07crypto: api - Add crypto_alloc_instance2Herbert Xu1-0/+2
This patch adds a new argument to crypto_alloc_instance which sets aside some space before the instance for use by algorithms such as shash that place type-specific data before crypto_alg. For compatibility the function has been renamed so that existing users aren't affected. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-07crypto: api - Add new template create functionHerbert Xu1-0/+1
This patch introduces the template->create function intended to replace the existing alloc function. The intention is for create to handle the registration directly, whereas currently the caller of alloc has to handle the registration. This allows type-specific code to be run prior to registration. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-03-04crypto: zlib - New zlib crypto module, using pcompGeert Uytterhoeven1-0/+20
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-03-04crypto: compress - Add pcomp interfaceGeert Uytterhoeven2-0/+153
The current "comp" crypto interface supports one-shot (de)compression only, i.e. the whole data buffer to be (de)compressed must be passed at once, and the whole (de)compressed data buffer will be received at once. In several use-cases (e.g. compressed file systems that store files in big compressed blocks), this workflow is not suitable. Furthermore, the "comp" type doesn't provide for the configuration of (de)compression parameters, and always allocates workspace memory for both compression and decompression, which may waste memory. To solve this, add a "pcomp" partial (de)compression interface that provides the following operations: - crypto_compress_{init,update,final}() for compression, - crypto_decompress_{init,update,final}() for decompression, - crypto_{,de}compress_setup(), to configure (de)compression parameters (incl. allocating workspace memory). The (de)compression methods take a struct comp_request, which was mimicked after the z_stream object in zlib, and contains buffer pointer and length pairs for input and output. The setup methods take an opaque parameter pointer and length pair. Parameters are supposed to be encoded using netlink attributes, whose meanings depend on the actual (name of the) (de)compression algorithm. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-19crypto: api - Use dedicated workqueue for crypto subsystemHuang Ying1-0/+7
Use dedicated workqueue for crypto subsystem A dedicated workqueue named kcrypto_wq is created to be used by crypto subsystem. The system shared keventd_wq is not suitable for encryption/decryption, because of potential starvation problem. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18crypto: shash - Add crypto_shash_blocksizeHerbert Xu1-0/+5
This function is needed by algorithms that don't know their own block size, e.g., in s390 where the code is common between multiple versions of SHA. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18crypto: cryptd - Add support to access underlying blkcipherHuang Ying1-0/+27
cryptd_alloc_ablkcipher() will allocate a cryptd-ed ablkcipher for specified algorithm name. The new allocated one is guaranteed to be cryptd-ed ablkcipher, so the blkcipher underlying can be gotten via cryptd_ablkcipher_child(). Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18crypto: aes - Move key_length in struct crypto_aes_ctx to be the last fieldHuang Ying1-1/+5
The Intel AES-NI AES acceleration instructions need key_enc, key_dec in struct crypto_aes_ctx to be 16 byte aligned, it make this easier to move key_length to be the last one. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-05crypto: shash - Fix tfm destructionHerbert Xu1-1/+1
We were freeing an offset into the slab object instead of the start. This patch fixes it by calling crypto_destroy_tfm which allows the correct address to be given. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25crypto: aes - Precompute tablesHerbert Xu1-4/+4
The tables used by the various AES algorithms are currently computed at run-time. This has created an init ordering problem because some AES algorithms may be registered before the tables have been initialised. This patch gets around this whole thing by precomputing the tables. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25crypto: hash - Export shash through hashHerbert Xu2-0/+8
This patch allows shash algorithms to be used through the old hash interface. This is a transitional measure so we can convert the underlying algorithms to shash before converting the users across. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25crypto: hash - Add import/export interfaceHerbert Xu2-5/+21
It is often useful to save the partial state of a hash function so that it can be used as a base for two or more computations. The most prominent example is HMAC where all hashes start from a base determined by the key. Having an import/export interface means that we only have to compute that base once rather than for each message. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25crypto: hash - Add shash interfaceHerbert Xu2-0/+112
The shash interface replaces the current synchronous hash interface. It improves over hash in two ways. Firstly shash is reentrant, meaning that the same tfm may be used by two threads simultaneously as all hashing state is stored in a local descriptor. The other enhancement is that shash no longer takes scatter list entries. This is because shash is specifically designed for synchronous algorithms and as such scatter lists are unnecessary. All existing hash users will be converted to shash once the algorithms have been completely converted. There is also a new finup function that combines update with final. This will be extended to ahash once the algorithm conversion is done. This is also the first time that an algorithm type has their own registration function. Existing algorithm types will be converted to this way in due course. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25crypto: api - Rebirth of crypto_alloc_tfmHerbert Xu1-0/+10
This patch reintroduces a completely revamped crypto_alloc_tfm. The biggest change is that we now take two crypto_type objects when allocating a tfm, a frontend and a backend. In fact this simply formalises what we've been doing behind the API's back. For example, as it stands crypto_alloc_ahash may use an actual ahash algorithm or a crypto_hash algorithm. Putting this in the API allows us to do this much more cleanly. The existing types will be converted across gradually. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25crypto: api - Move type exit function into crypto_tfmHerbert Xu1-1/+0
The type exit function needs to undo any allocations done by the type init function. However, the type init function may differ depending on the upper-level type of the transform (e.g., a crypto_blkcipher instantiated as a crypto_ablkcipher). So we need to move the exit function out of the lower-level structure and into crypto_tfm itself. As it stands this is a no-op since nobody uses exit functions at all. However, all cases where a lower-level type is instantiated as a different upper-level type (such as blkcipher as ablkcipher) will be converted such that they allocate the underlying transform and use that instead of casting (e.g., crypto_ablkcipher casted into crypto_blkcipher). That will need to use a different exit function depending on the upper-level type. This patch also allows the type init/exit functions to call (or not) cra_init/cra_exit instead of always calling them from the top level. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29crypto: rng - RNG interface and implementationNeil Horman2-0/+101
This patch adds a random number generator interface as well as a cryptographic pseudo-random number generator based on AES. It is meant to be used in cases where a deterministic CPRNG is required. One of the first applications will be as an input in the IPsec IV generation process. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29crypto: skcipher - Move IV generators into their own modulesHerbert Xu1-6/+0
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>
2008-08-13crypto: hash - Add missing top-level functionsHerbert Xu1-0/+18
The top-level functions init/update/final were missing for ahash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10crypto: hash - Move ahash functions into crypto/hash.hHerbert Xu3-36/+191
All new crypto interfaces should go into individual files as much as possible in order to ensure that crypto.h does not collapse under its own weight. This patch moves the ahash code into crypto/hash.h and crypto/internal/hash.h respectively. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10crypto: hash - Added scatter list walking helperHerbert Xu1-0/+41
This patch adds the walking helpers for hash algorithms akin to those of block ciphers. This is a necessary step before we can reimplement existing hash algorithms using the new ahash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10[CRYPTO] hash: Add asynchronous hash supportLoc Ho1-0/+36
This patch adds asynchronous hash and digest support. Signed-off-by: Loc Ho <lho@amcc.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-05-01[CRYPTO] api: Fix scatterwalk_sg_chainHerbert Xu1-0/+4
When I backed out of using the generic sg chaining (as it isn't currently portable) and introduced scatterwalk_sg_chain/scatterwalk_sg_next I left out the sg_is_last check in the latter. This causes it to potentially dereference beyond the end of the sg array. As most uses of scatterwalk_sg_next are bound by an overall length, this only affected the chaining code in authenc and eseqiv. Thanks to Patrick McHardy for identifying this problem. This patch also clears the "last" bit on the head of the chained list as it's no longer last. This also went missing in scatterwalk_sg_chain and is present in sg_chain. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-04-21[CRYPTO] aes: Export generic setkeySebastian Siewior1-2/+6
The key expansion routine could be get little more generic, become a kernel doc entry and then get exported. Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc> Tested-by: Stefan Hellermann <stefan@the2masters.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-03-08[CRYPTO] skcipher: Fix section mismatchesHerbert Xu1-1/+1
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>
2008-02-23[CRYPTO] skcipher: Move chainiv/seqiv into crypto_blkcipher moduleHerbert Xu1-0/+6
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>
2008-01-11[CRYPTO] api: Include sched.h for cond_resched in scatterwalk.hHerbert Xu1-0/+1
As Andrew Morton correctly points out, we need to explicitly include sched.h as we use the function cond_resched in crypto/scatterwalk.h. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11[CRYPTO] chainiv: Avoid lock spinning where possibleHerbert Xu1-0/+13
This patch makes chainiv avoid spinning by postponing requests on lock contention if the user allows the use of asynchronous algorithms. If a synchronous algorithm is requested then we behave as before. This should improve IPsec performance on SMP when two CPUs attempt to transmit over the same SA. Currently one of them will spin doing nothing waiting for the other CPU to finish its encryption. This patch makes it postpone the request and get on with other work. If only one CPU is transmitting for a given SA, then we will process the request synchronously as before. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11[CRYPTO] null: Add null blkcipher algorithmHerbert Xu1-0/+5
This patch adds a null blkcipher algorithm called ecb(cipher_null) for backwards compatibility. Previously the null algorithm when used by IPsec copied the data byte by byte. This new algorithm optimises that to a straight memcpy which lets us better measure inherent overheads in our IPsec code. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11[CRYPTO] aead: Create default givcipher instancesHerbert Xu1-0/+3
This patch makes crypto_alloc_aead always return algorithms that is capable of generating their own IVs through givencrypt and givdecrypt. All existing AEAD algorithms already do. New ones must either supply their own or specify a generic IV generator with the geniv field. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11[CRYPTO] aead: Add aead_geniv_alloc/aead_geniv_freeHerbert Xu1-0/+77
This patch creates the infrastructure to help the construction of IV generator templates that wrap around AEAD algorithms by adding an IV generator to them. This is useful for AEAD algorithms with no built-in IV generator or to replace their built-in generator. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11[CRYPTO] aead: Add top-level givencrypt/givdecrypt callsHerbert Xu1-0/+67
This patch finally makes the givencrypt/givdecrypt operations available to users by adding crypto_aead_givencrypt and crypto_aead_givdecrypt. A suite of helpers to allocate and fill in the request is also available. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>