When the user explicitly states that they don't care whether the
algorithm has been tested (type = CRYPTO_ALG_TESTED and mask = 0),
there is a corner case where we may erroneously return ENOENT.
This patch fixes it by correcting the logic in the test.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
When the user explicitly states that they don't care whether the
algorithm has been tested (type = CRYPTO_ALG_TESTED and mask = 0),
there is a corner case where we may erroneously return ENOENT.
This patch fixes it by correcting the logic in the test.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The commit 59afdc7b32 ("crypto:
api - Move module sig ifdef into accessor function") broke the
build when modules are completely disabled because we directly
dereference module->name.
This patch fixes this by using the accessor function module_name.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
All users of AEAD should include crypto/aead.h instead of
include/linux/crypto.h.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
All users of AEAD should include crypto/aead.h instead of
include/linux/crypto.h.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
All users of AEAD should include crypto/aead.h instead of
include/linux/crypto.h.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
Now that all fips_enabled users are including linux/fips.h directly
instead of getting it through internal.h, we can remove the fips.h
inclusions from internal.h.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
All users of fips_enabled should include linux/fips.h directly
instead of getting it through internal.h.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
All users of fips_enabled should include linux/fips.h directly
instead of getting it through internal.h which is reserved for
internal crypto API implementors.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
There is currently a large ifdef FIPS code section in proc.c.
Ostensibly it's there because the fips_enabled sysctl sits under
/proc/sys/crypto. However, no other crypto sysctls exist.
In fact, the whole ethos of the crypto API is against such user
interfaces so this patch moves all the FIPS sysctl code over to
fips.c.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The header file internal.h is only meant for internal crypto API
implementors such as rng.c. So fips has no business in including
it.
This patch removes that inclusions and instead adds inclusions of
the actual features used by fips.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
All users of fips_enabled should include linux/fips.h directly
instead of getting it through internal.h.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch removes the unnecessary CRYPTO_FIPS ifdef from
drbg_healthcheck_sanity so that the code always gets checked
by the compiler.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephan Mueller <smueller@chronox.de>
Currently we're hiding mod->sig_ok under an ifdef in open code.
This patch adds a module_sig_ok accessor function and removes that
ifdef.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
The function crypto_ahash_init can also be asynchronous just
like update and final. So all callers must be able to handle
an async return.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
If we allocate a seed on behalf ot the user in crypto_rng_reset,
we must ensure that it is zeroed afterwards or the RNG may be
compromised.
Reported-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Now that crypto_rng_reset takes a const argument, we no longer
need to cast away the const qualifier.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Now that all rng implementations have switched over to the new
interface, we can remove the old low-level interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch ocnverts the ANSI CPRNG implementation to the new
low-level rng interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
The file internal.h is only meant to be used by internel API
implementation and not algorithm implementations. In fact it
isn't even needed here so this patch removes it.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
This patch converts the DRBG implementation to the new low-level
rng interface.
This allows us to get rid of struct drbg_gen by using the new RNG
API instead.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephan Mueller <smueller@chronox.de>
This patch adds the helpers that allow the registration and removal
of multiple RNG algorithms.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch converts the low-level crypto_rng interface to the
"new" style.
This allows existing implementations to be converted over one-
by-one. Once that is complete we can then remove the old rng
interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
There is no reason why crypto_rng_reset should modify the seed
so this patch marks it as const. Since our algorithms don't
export a const seed function yet we have to go through some
contortions for now.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch adds the new top-level function crypto_rng_generate
which generates random numbers with additional input. It also
extends the mid-level rng_gen_random function to take additional
data as input.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch converts the top-level crypto_rng to the "new" style.
It was the last algorithm type added before we switched over
to the new way of doing things exemplified by shash.
All users will automatically switch over to the new interface.
Note that this patch does not touch the low-level interface to
rng implementations.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch adds a crypto_alg_extsize helper that can be used
by algorithm types such as pcompress and shash.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Initialising the RNG in drbg_kcapi_init is a waste of precious
entropy because all users will immediately seed the RNG after
the allocation.
In fact, all users should seed the RNG before using it. So there
is no point in doing the seeding in drbg_kcapi_init.
This patch removes the initial seeding and the user must seed
the RNG explicitly (as they all currently do).
This patch also changes drbg_kcapi_reset to allow reseeding.
That is, if you call it after a successful initial seeding, then
it will not reset the internal state of the DRBG before mixing
the new input and entropy.
If you still wish to reset the internal state, you can always
free the DRBG and allocate a new one.
Finally this patch removes locking from drbg_uninstantiate because
it's now only called from the destruction path which must not be
executed in parallel with normal operations.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephan Mueller <smueller@chronox.de>
As we moved the mutex init out of drbg_instantiate and into cra_init
we need to explicitly initialise the mutex in drbg_healthcheck_sanity.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephan Mueller <smueller@chronox.de>
As the DRBG does not operate on shadow copies of the DRBG instance
any more, the cipher handles only need to be allocated once during
initalization time and deallocated during uninstantiate time.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The creation of a shadow copy is intended to only hold a short term
lock. But the drawback is that parallel users have a very similar DRBG
state which only differs by a high-resolution time stamp.
The DRBG will now hold a long term lock. Therefore, the lock is changed
to a mutex which implies that the DRBG can only be used in process
context.
The lock now guards the instantiation as well as the entire DRBG
generation operation. Therefore, multiple callers are fully serialized
when generating a random number.
As the locking is changed to use a long-term lock to avoid such similar
DRBG states, the entire creation and maintenance of a shadow copy can be
removed.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The drbg_generate returns 0 in success case. That means that
drbg_generate_long will always only generate drbg_max_request_bytes at
most. Longer requests will be truncated to drbg_max_request_bytes.
Reported-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The buffer uses for temporary data must be cleared entirely. In AES192
the used buffer is drbg_statelen(drbg) + drbg_blocklen(drbg) as
documented in the comment above drbg_ctr_df.
This patch ensures that the temp buffer is completely wiped.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Commit 9c521a200b ("crypto: api - remove instance when test failed")
tried to grab a module reference count before the module was even set.
Worse, it then goes on to free the module reference count after it is
set so you quickly end up with a negative module reference count which
prevents people from using any instances belonging to that module.
This patch moves the module initialisation before the reference
count.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The networking updates from David Miller removed the iocb argument from
sendmsg and recvmsg (in commit 1b784140474e: "net: Remove iocb argument
from sendmsg and recvmsg"), but the crypto code had added new instances
of them.
When I pulled the crypto update, it was a silent semantic mis-merge, and
I overlooked the new warning messages in my test-build. I try to fix
those in the merge itself, but that relies on me noticing. Oh well.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull crypto update from Herbert Xu:
"Here is the crypto update for 4.1:
New interfaces:
- user-space interface for AEAD
- user-space interface for RNG (i.e., pseudo RNG)
New hashes:
- ARMv8 SHA1/256
- ARMv8 AES
- ARMv8 GHASH
- ARM assembler and NEON SHA256
- MIPS OCTEON SHA1/256/512
- MIPS img-hash SHA1/256 and MD5
- Power 8 VMX AES/CBC/CTR/GHASH
- PPC assembler AES, SHA1/256 and MD5
- Broadcom IPROC RNG driver
Cleanups/fixes:
- prevent internal helper algos from being exposed to user-space
- merge common code from assembly/C SHA implementations
- misc fixes"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (169 commits)
crypto: arm - workaround for building with old binutils
crypto: arm/sha256 - avoid sha256 code on ARMv7-M
crypto: x86/sha512_ssse3 - move SHA-384/512 SSSE3 implementation to base layer
crypto: x86/sha256_ssse3 - move SHA-224/256 SSSE3 implementation to base layer
crypto: x86/sha1_ssse3 - move SHA-1 SSSE3 implementation to base layer
crypto: arm64/sha2-ce - move SHA-224/256 ARMv8 implementation to base layer
crypto: arm64/sha1-ce - move SHA-1 ARMv8 implementation to base layer
crypto: arm/sha2-ce - move SHA-224/256 ARMv8 implementation to base layer
crypto: arm/sha256 - move SHA-224/256 ASM/NEON implementation to base layer
crypto: arm/sha1-ce - move SHA-1 ARMv8 implementation to base layer
crypto: arm/sha1_neon - move SHA-1 NEON implementation to base layer
crypto: arm/sha1 - move SHA-1 ARM asm implementation to base layer
crypto: sha512-generic - move to generic glue implementation
crypto: sha256-generic - move to generic glue implementation
crypto: sha1-generic - move to generic glue implementation
crypto: sha512 - implement base layer for SHA-512
crypto: sha256 - implement base layer for SHA-256
crypto: sha1 - implement base layer for SHA-1
crypto: api - remove instance when test failed
crypto: api - Move alg ref count init to crypto_check_alg
...
This updated the generic SHA-512 implementation to use the
generic shared SHA-512 glue code.
It also implements a .finup hook crypto_sha512_finup() and exports
it to other modules. The import and export() functions and the
.statesize member are dropped, since the default implementation
is perfectly suitable for this module.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This updates the generic SHA-256 implementation to use the
new shared SHA-256 glue code.
It also implements a .finup hook crypto_sha256_finup() and exports
it to other modules. The import and export() functions and the
.statesize member are dropped, since the default implementation
is perfectly suitable for this module.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This updated the generic SHA-1 implementation to use the generic
shared SHA-1 glue code.
It also implements a .finup hook crypto_sha1_finup() and exports
it to other modules. The import and export() functions and the
.statesize member are dropped, since the default implementation
is perfectly suitable for this module.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
A cipher instance is added to the list of instances unconditionally
regardless of whether the associated test failed. However, a failed
test implies that during another lookup, the cipher instance will
be added to the list again as it will not be found by the lookup
code.
That means that the list can be filled up with instances whose tests
failed.
Note: tests only fail in reality in FIPS mode when a cipher is not
marked as fips_allowed=1. This can be seen with cmac(des3_ede) that does
not have a fips_allowed=1. When allocating the cipher, the allocation
fails with -ENOENT due to the missing fips_allowed=1 flag (which
causes the testmgr to return EINVAL). Yet, the instance of
cmac(des3_ede) is shown in /proc/crypto. Allocating the cipher again
fails again, but a 2nd instance is listed in /proc/crypto.
The patch simply de-registers the instance when the testing failed.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
We currently initialise the crypto_alg ref count in the function
__crypto_register_alg. As one of the callers of that function
crypto_register_instance needs to obtain a ref count before it
calls __crypto_register_alg, we need to move the initialisation
out of there.
Since both callers of __crypto_register_alg call crypto_check_alg,
this is the logical place to perform the initialisation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephan Mueller <smueller@chronox.de>
trivial conflict in net/socket.c and non-trivial one in crypto -
that one had evaded aio_complete() removal.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The function crypto_alg_match returns an algorithm without taking
any references on it. This means that the algorithm can be freed
at any time, therefore all users of crypto_alg_match are buggy.
This patch fixes this by taking a reference count on the algorithm
to prevent such races.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch fix a spelling typo in crypto/Kconfig.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch makes crypto_unregister_instance take a crypto_instance
instead of a crypto_alg. This allows us to remove a duplicate
CRYPTO_ALG_INSTANCE check in crypto_unregister_instance.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
There are multiple problems in crypto_unregister_instance:
1) The cra_refcnt BUG_ON check is racy and can cause crashes.
2) The cra_refcnt check shouldn't exist at all.
3) There is no reference on tmpl to protect the tmpl->free call.
This patch rewrites the function using crypto_remove_spawn which
now morphs into crypto_remove_instance.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
