Commit Graph

100 Commits

Author SHA1 Message Date
Herbert Xu
500b3e3c3d crypto: ahash - Remove old_ahash_alg
Now that all ahash implementations have been converted to the new
ahash type, we can remove old_ahash_alg and its associated support.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 20:29:57 +08:00
Herbert Xu
4dc10c0142 crypto: crypto4xx - Switch to new style ahash
This patch changes crypto4xx to use the new style ahash type.
In particular, we now use ahash_alg to define ahash algorithms
instead of crypto_alg.

This is achieved by introducing a union that encapsulates the
new type and the existing crypto_alg structure.  They're told
apart through a u32 field containing the type value.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 20:21:46 +08:00
Herbert Xu
9cd899a32f crypto: cryptd - Switch to template create API
This patch changes cryptd to use the template->create function
instead of alloc in anticipation for the switch to new style
ahash algorithms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 18:45:45 +08:00
Herbert Xu
52861c7cd7 crypto: hash - Add helpers to free spawns
This patch adds the helpers crypto_drop_ahash and crypto_drop_shash
so that these spawns can be dropped without ugly casts.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 18:30:24 +08:00
Herbert Xu
01c2dece43 crypto: ahash - Add instance/spawn support
This patch adds support for creating ahash instances and using
ahash as spawns.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 15:54:09 +08:00
Herbert Xu
88056ec346 crypto: ahash - Convert to new style algorithms
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>
2009-07-14 15:54:07 +08:00
Herbert Xu
2ca33da1de crypto: api - Remove frontend argument from extsize/init_tfm
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>
2009-07-14 12:58:15 +08:00
Herbert Xu
fc00127fb6 crypto: ahash - Add crypto_ahash_set_reqsize
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>
2009-07-14 12:58:11 +08:00
Herbert Xu
7eddf95ec5 crypto: shash - Export async functions
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>
2009-07-14 12:58:08 +08:00
Herbert Xu
113adefc73 crypto: shash - Make descsize a run-time attribute
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>
2009-07-14 12:58:00 +08:00
Herbert Xu
aef73cfcb9 crypto: async - Use kzfree for requests
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>
2009-07-12 10:46:03 +08:00
Herbert Xu
9b2fda7b94 crypto: sha256_generic - Add export/import support
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>
2009-07-11 18:23:34 +08:00
Herbert Xu
e2a7ce4e18 crypto: sha1_generic - Add export/import support
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>
2009-07-11 18:23:33 +08:00
Herbert Xu
99d27e1c59 crypto: shash - Export/import hash state only
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>
2009-07-11 18:23:32 +08:00
Herbert Xu
ef5d590c9b crypto: shash - Add shash_instance_ctx
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>
2009-07-09 11:32:55 +08:00
Herbert Xu
0390e6aecf crypto: shash - Add __crypto_shash_cast
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>
2009-07-08 22:36:36 +08:00
Herbert Xu
cde6263fa9 crypto: shash - Add crypto_shash_ctx_aligned
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>
2009-07-08 22:32:07 +08:00
Herbert Xu
619a6ebd25 crypto: shash - Add shash_register_instance
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>
2009-07-08 19:00:38 +08:00
Herbert Xu
7d6f56400a crypto: shash - Add shash_attr_alg2 helper
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>
2009-07-08 18:58:30 +08:00
Herbert Xu
d06854f024 crypto: api - Add crypto_attr_alg2 helper
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>
2009-07-08 18:58:29 +08:00
Herbert Xu
942969992d crypto: shash - Add spawn support
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>
2009-07-08 18:58:29 +08:00
Herbert Xu
97eedce1a6 crypto: api - Add new style spawn support
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>
2009-07-08 18:57:10 +08:00
Herbert Xu
2e4fddd8e4 crypto: shash - Add shash_instance
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>
2009-07-08 18:57:10 +08:00
Herbert Xu
70ec7bb91a crypto: api - Add crypto_alloc_instance2
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>
2009-07-07 18:55:28 +08:00
Herbert Xu
f2ac72e826 crypto: api - Add new template create function
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>
2009-07-07 12:30:33 +08:00
Geert Uytterhoeven
bf68e65ec9 crypto: zlib - New zlib crypto module, using pcomp
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>
2009-03-04 15:16:19 +08:00
Geert Uytterhoeven
a1d2f09544 crypto: compress - Add pcomp interface
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>
2009-03-04 15:05:33 +08:00
Huang Ying
25c38d3fb9 crypto: api - Use dedicated workqueue for crypto subsystem
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>
2009-02-19 14:33:40 +08:00
Herbert Xu
9749598633 crypto: shash - Add crypto_shash_blocksize
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>
2009-02-18 16:48:06 +08:00
Huang Ying
1cac2cbc76 crypto: cryptd - Add support to access underlying blkcipher
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>
2009-02-18 16:48:05 +08:00
Huang Ying
109568e110 crypto: aes - Move key_length in struct crypto_aes_ctx to be the last field
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>
2009-02-18 16:48:04 +08:00
Herbert Xu
412e87ae5d crypto: shash - Fix tfm destruction
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>
2009-02-05 16:51:25 +11:00
Herbert Xu
0ee4a96902 crypto: aes - Precompute tables
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>
2008-12-25 11:05:13 +11:00
Herbert Xu
5f7082ed4f crypto: hash - Export shash through hash
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>
2008-12-25 11:01:33 +11:00
Herbert Xu
dec8b78606 crypto: hash - Add import/export interface
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>
2008-12-25 11:01:30 +11:00
Herbert Xu
7b5a080b3c crypto: hash - Add shash interface
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>
2008-12-25 11:01:26 +11:00
Herbert Xu
7b0bac64cd crypto: api - Rebirth of crypto_alloc_tfm
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>
2008-12-25 11:01:24 +11:00
Herbert Xu
4a7794860b crypto: api - Move type exit function into crypto_tfm
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>
2008-12-25 11:01:23 +11:00
Neil Horman
17f0f4a47d crypto: rng - RNG interface and implementation
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>
2008-08-29 15:50:04 +10:00
Herbert Xu
5be5e667a9 crypto: skcipher - Move IV generators into their own modules
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>
2008-08-29 15:50:00 +10:00
Herbert Xu
318e531392 crypto: hash - Add missing top-level functions
The top-level functions init/update/final were missing for ahash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-13 20:08:44 +10:00
Herbert Xu
18e33e6d5c crypto: hash - Move ahash functions into crypto/hash.h
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>
2008-07-10 20:35:18 +08:00
Herbert Xu
20036252fc crypto: hash - Added scatter list walking helper
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 20:35:18 +08:00
Loc Ho
004a403c2e [CRYPTO] hash: Add asynchronous hash support
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>
2008-07-10 20:35:13 +08:00
Herbert Xu
8ec970d856 [CRYPTO] api: Fix scatterwalk_sg_chain
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>
2008-05-01 18:22:28 +08:00
Sebastian Siewior
5427663f49 [CRYPTO] aes: Export generic setkey
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>
2008-04-21 10:19:34 +08:00
Herbert Xu
f13ba2f7d3 [CRYPTO] skcipher: Fix section mismatches
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>
2008-03-08 20:29:43 +08:00
Herbert Xu
76fc60a2e3 [CRYPTO] skcipher: Move chainiv/seqiv into crypto_blkcipher module
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>
2008-02-23 11:12:06 +08:00
Herbert Xu
1c5dfe6a95 [CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h
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 08:16:59 +11:00
Herbert Xu
e7cd2514ea [CRYPTO] chainiv: Avoid lock spinning where possible
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 08:16:55 +11:00