Commit Graph

74009 Commits

Author SHA1 Message Date
Herbert Xu aedb30dc49 [CRYPTO] aead: Allow algorithms with no givcrypt support
Some algorithms always require manual IV construction.  For instance,
the generic CCM algorithm requires the first byte of the IV to be manually
constructed.  Such algorithms are always used by other algorithms equipped
with their own IV generators and do not need IV generation per se.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:50 +11:00
Herbert Xu 3a282bd2e7 [CRYPTO] aead: Add top-level givencrypt/givdecrypt calls
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>
2008-01-11 08:16:50 +11:00
Herbert Xu e56dd56418 [CRYPTO] authenc: Add givencrypt operation
This patch implements the givencrypt function for authenc.  It simply
calls the givencrypt operation on the underlying cipher instead of encrypt.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:50 +11:00
Herbert Xu 743edf5727 [CRYPTO] aead: Add givcrypt operations
This patch adds the underlying givcrypt operations for aead and associated
support elements.  The rationale is identical to that of the skcipher
givcrypt operations, i.e., sometimes only the algorithm knows how the
IV should be generated.

A new request type aead_givcrypt_request is added which contains an
embedded aead_request structure with two new elements to support this
operation.  The new elements are seq and giv.  The seq field should
contain a strictly increasing 64-bit integer which may be used by
certain IV generators as an input value.  The giv field will be used
to store the generated IV.  It does not need to obey the alignment
requirements of the algorithm because it's not used during the operation.

The existing iv field must still be available as it will be used to store
intermediate IVs and the output IV if chaining is desired.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:49 +11:00
Herbert Xu 03bf712fb4 [CRYPTO] skcipher: Add top-level givencrypt/givdecrypt calls
This patch finally makes the givencrypt/givdecrypt operations available
to users by adding crypto_skcipher_givencrypt and crypto_skcipher_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>
2008-01-11 08:16:49 +11:00
Herbert Xu 0a270321db [CRYPTO] seqiv: Add Sequence Number IV Generator
This generator generates an IV based on a sequence number by xoring it
with a salt.  This algorithm is mainly useful for CTR and similar modes.

This patch also sets it as the default IV generator for ctr.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:48 +11:00
Herbert Xu 45d44eb56a [CRYPTO] skcipher: Remove crypto_spawn_ablkcipher
Now that gcm and authenc have been converted to crypto_spawn_skcipher,
this patch removes the obsolete crypto_spawn_ablkcipher function.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:48 +11:00
Herbert Xu 1472e5ebaa [CRYPTO] gcm: Use crypto_grab_skcipher
This patch converts the gcm algorithm over to crypto_grab_skcipher
which is a prerequisite for IV generation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:47 +11:00
Herbert Xu d00aa19b50 [CRYPTO] gcm: Allow block cipher parameter
This patch adds the gcm_base template which takes a block cipher
parameter instead of cipher.  This allows the user to specify a
specific CTR implementation.

This also fixes a leak of the cipher algorithm that was previously
looked up but never freed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:47 +11:00
Herbert Xu 9ffde35a8e [CRYPTO] authenc: Use crypto_grab_skcipher
This patch converts the authenc algorithm over to crypto_grab_skcipher
which is a prerequisite for IV generation.

This patch also changes authenc to set its ASYNC status depending on
the ASYNC status of the underlying skcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:46 +11:00
Herbert Xu b9c55aa475 [CRYPTO] skcipher: Create default givcipher instances
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>
2008-01-11 08:16:46 +11:00
Herbert Xu 806d183aa6 [CRYPTO] eseqiv: Add Encrypted Sequence Number IV Generator
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>
2008-01-11 08:16:45 +11:00
Herbert Xu 15c6728668 [CRYPTO] skcipher: Added skcipher_givcrypt_complete
This patch adds the helper skcipher_givcrypt_complete which should be
called when an ablkcipher algorithm has completed a givcrypt request.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:45 +11:00
Herbert Xu 7f47073911 [CRYPTO] chainiv: Add chain IV generator
The chain IV generator is the one we've been using in the IPsec stack.
It simply starts out with a random IV, then uses the last block of each
encrypted packet's cipher text as the IV for the next packet.

It can only be used by synchronous ciphers since we have to make sure
that we don't start the encryption of the next packet until the last
one has completed.

It does have the advantage of using very little CPU time since it doesn't
have to generate anything at all.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:44 +11:00
Herbert Xu ecfc43292f [CRYPTO] skcipher: Add skcipher_geniv_alloc/skcipher_geniv_free
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>
2008-01-11 08:16:44 +11:00
Herbert Xu 927eead52c [CRYPTO] cryptd: Use geniv of the underlying algorithm
If the underlying algorithm specifies a specific geniv algorithm then
we should use it for the cryptd version as well.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:43 +11:00
Herbert Xu 23508e11ab [CRYPTO] skcipher: Added geniv field
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>
2008-01-11 08:16:43 +11:00
Herbert Xu 61da88e2b8 [CRYPTO] skcipher: Add givcrypt operations and givcipher type
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>
2008-01-11 08:16:43 +11:00
Herbert Xu 378f4f51f9 [CRYPTO] skcipher: Add crypto_grab_skcipher interface
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>
2008-01-11 08:16:42 +11:00
Herbert Xu 84c9115230 [CRYPTO] gcm: Add support for async ciphers
This patch adds the necessary changes for GCM to be used with async
ciphers.  This would allow it to be used with hardware devices that
support CTR.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:42 +11:00
Herbert Xu 5311f248b7 [CRYPTO] ctr: Refactor into ctr and rfc3686
As discussed previously, this patch moves the basic CTR functionality
into a chainable algorithm called ctr.  The IPsec-specific variant of
it is now placed on top with the name rfc3686.

So ctr(aes) gives a chainable cipher with IV size 16 while the IPsec
variant will be called rfc3686(ctr(aes)).  This patch also adjusts
gcm accordingly.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:41 +11:00
Herbert Xu 653ebd9c85 [CRYPTO] blkcipher: Merge ablkcipher and blkcipher into one option/module
With the impending addition of the givcipher type, both blkcipher and
ablkcipher algorithms will use it to create givcipher objects.  As such
it no longer makes sense to split the system between ablkcipher and
blkcipher.  In particular, both ablkcipher.c and blkcipher.c would need
to use the givcipher type which has to reside in ablkcipher.c since it
shares much code with it.

This patch merges the two Kconfig options as well as the modules into one.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:41 +11:00
Herbert Xu 2589469d7b [CRYPTO] gcm: Fix request context alignment
This patch fixes the request context alignment so that it is actually
aligned to the value required by the algorithm.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:40 +11:00
Herbert Xu 68b6c7d691 [CRYPTO] api: Add crypto_attr_alg_name
This patch adds a new helper crypto_attr_alg_name which is basically the
first half of crypto_attr_alg.  That is, it returns an algorithm name
parameter as a string without looking it up.  The caller can then look it
up immediately or defer it until later.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:40 +11:00
Herbert Xu 551a09a7a9 [CRYPTO] api: Sanitise mask when allocating ablkcipher/hash
When allocating ablkcipher/hash objects, we use a mask that's wider than
the usual type mask.  This patch sanitises the mask supplied by the user
so we don't end up using a narrower mask which may lead to unintended
results.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:39 +11:00
Borislav Petkov 5e553110f2 [CRYPTO] authenc: Select HASH in Kconfig
i get here:

----
  LD      vmlinux
  SYSMAP  System.map
  SYSMAP  .tmp_System.map
  Building modules, stage 2.
  MODPOST 226 modules
ERROR: "crypto_hash_type" [crypto/authenc.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
---

which fails because crypto_hash_type is declared in crypto/hash.c. You might wanna
fix it like so:

Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:39 +11:00
Adrian Bunk f17922bc75 [CRYPTO] geode: Add __dev{init,exit} annotations
This patch adds __dev{init,exit} annotations.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:38 +11:00
Herbert Xu 7c3d703fa8 [CRYPTO] authenc: Merge common hashing code
This patch merges the common hashing code between encryption and decryption.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:38 +11:00
Herbert Xu 12dc5e62b4 [CRYPTO] authenc: Use RTA_OK to check length
This patch changes setkey to use RTA_OK to check the validity of the
setkey request.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:38 +11:00
Herbert Xu c2c61f513d [CRYPTO] authenc: Fix typo in ivsize
The ivsize should be fetched from ablkcipher, not blkcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:37 +11:00
Sebastian Siewior 2d74d405fc [CRYPTO] s390-aes: Use correct encrypt/decrypt function in fallback
crypto_blkcipher_decrypt is wrong because it does not care about
the IV.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:37 +11:00
Sebastian Siewior fdc520aa69 [CRYPTO] geode: Use correct encrypt/decrypt function in fallback
crypto_blkcipher_decrypt is wrong because it does not care about
the IV.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:36 +11:00
Tan Swee Heng 5de8f1b562 [CRYPTO] tcrypt: Added salsa20 speed test
This patch adds a simple speed test for salsa20.
Usage: modprobe tcrypt mode=206

Signed-of-by: Tan Swee Heng <thesweeheng@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:36 +11:00
Zoltan Sogor 0b77abb3b2 [CRYPTO] lzo: Add LZO compression algorithm support
Add LZO compression algorithm support

Signed-off-by: Zoltan Sogor <weth@inf.u-szeged.hu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:35 +11:00
Zoltan Sogor 91755a921c [CRYPTO] tcrypt: Add common compression tester function
Add common compression tester function
Modify deflate test case to use the common compressor test function

Signed-off-by: Zoltan Sogor <weth@inf.u-szeged.hu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:34 +11:00
Tan Swee Heng 8bff664cdf [CRYPTO] tcrypt: Salsa20 large test vector
This is a large test vector for Salsa20 that crosses the 4096-bytes
page boundary.

Signed-off-by: Tan Swee Heng <thesweeheng@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:34 +11:00
Tan Swee Heng eb6f13eb9f [CRYPTO] salsa20_generic: Fix multi-page processing
This patch fixes the multi-page processing bug that affects large test
vectors (the same bug that previously affected ctr.c).

There is an optimization for the case walk.nbytes == nbytes. Also we
now use crypto_xor() instead of adhoc XOR routines.

Signed-off-by: Tan Swee Heng <thesweeheng@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:34 +11:00
Herbert Xu 7f6813786a [CRYPTO] gcm: Put abreq in private context instead of on stack
The abreq structure is currently allocated on the stack.  This is broken
if the underlying algorithm is asynchronous.  This patch changes it so
that it's taken from the private context instead which has been enlarged
accordingly.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:33 +11:00
Herbert Xu b2ab4a57b0 [CRYPTO] scatterwalk: Restore custom sg chaining for now
Unfortunately the generic chaining hasn't been ported to all architectures
yet, and notably not s390.  So this patch restores the chainging that we've
been using previously which does work everywhere.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:33 +11:00
Herbert Xu 42c271c6c5 [CRYPTO] scatterwalk: Move scatterwalk.h to linux/crypto
The scatterwalk infrastructure is used by algorithms so it needs to
move out of crypto for future users that may live in drivers/crypto
or asm/*/crypto.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:32 +11:00
Herbert Xu fe70f5dfe1 [CRYPTO] aead: Return EBADMSG for ICV mismatch
This patch changes gcm/authenc to return EBADMSG instead of EINVAL for
ICV mismatches.  This convention has already been adopted by IPsec.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:32 +11:00
Herbert Xu 6160b28992 [CRYPTO] gcm: Fix ICV handling
The crypto_aead convention for ICVs is to include it directly in the
output.  If we decided to change this in future then we would make
the ICV (if the algorithm has an explicit one) available in the
request itself.

For now no algorithm needs this so this patch changes gcm to conform
to this convention.  It also adjusts the tcrypt aead tests to take
this into account.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:31 +11:00
Herbert Xu 8df213d9b5 [CRYPTO] tcrypt: Make gcm available as a standalone test
Currently the gcm(aes) tests have to be taken together with all other
ciphers.  This patch makes it available by itself at number 35.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:30 +11:00
Herbert Xu 481f34ae75 [CRYPTO] authenc: Fix hash verification
The previous code incorrectly included the hash in the verification which
also meant that we'd crash and burn when it comes to actually verifying
the hash since we'd go past the end of the SG list.

This patch fixes that by subtracting authsize from cryptlen at the start.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:30 +11:00
Herbert Xu e236d4a89a [CRYPTO] authenc: Move enckeylen into key itself
Having enckeylen as a template parameter makes it a pain for hardware
devices that implement ciphers with many key sizes since each one would
have to be registered separately.

Since the authenc algorithm is mainly used for legacy purposes where its
key is going to be constructed out of two separate keys, we can in fact
embed this value into the key itself.

This patch does this by prepending an rtnetlink header to the key that
contains the encryption key length.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:30 +11:00
Herbert Xu 7ba683a6de [CRYPTO] aead: Make authsize a run-time parameter
As it is authsize is an algorithm paramter which cannot be changed at
run-time.  This is inconvenient because hardware that implements such
algorithms would have to register each authsize that they support
separately.

Since authsize is a property common to all AEAD algorithms, we can add
a function setauthsize that sets it at run-time, just like setkey.

This patch does exactly that and also changes authenc so that authsize
is no longer a parameter of its template.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:29 +11:00
Herbert Xu e29bc6ad0e [CRYPTO] authenc: Use or instead of max on alignment masks
Since alignment masks are always one less than a power of two, we can
use binary or to find their maximum.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:28 +11:00
Kamalesh Babulal 9aa6ad3e87 [HWRNG] pasemi: Add missing wait argument to data_present
drivers/char/hw_random/pasemi-rng.c: In function `pasemi_rng_data_present':
drivers/char/hw_random/pasemi-rng.c:53: error: `wait' undeclared (first use in this function)
drivers/char/hw_random/pasemi-rng.c:53: error: (Each undeclared identifier is reported only once
drivers/char/hw_random/pasemi-rng.c:53: error: for each function it appears in.)
drivers/char/hw_random/pasemi-rng.c: At top level:
drivers/char/hw_random/pasemi-rng.c:93: warning: initialization from incompatible pointer type

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:28 +11:00
Sebastian Siewior b0c3e75d85 [CRYPTO] aes_s390: Add fallback driver
Some CPUs support only 128 bit keys in HW. This patch adds SW fallback
support for the other keys which may be required. The generic algorithm
(and the block mode) must be availble in case of a fallback.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:27 +11:00
Denis Cheng a10e11946b [CRYPTO] tcrypt: Use print_hex_dump from linux/kernel.h
These utilities implemented in lib/hexdump.c are more handy, please use this.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-11 08:16:27 +11:00