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 KRNG implementation to the new low-level
rng 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 adds the function crypto_rng_set_entropy.  It is only
meant to be used by testmgr when testing RNG implementations by
providing fixed entropy data in order to verify test vectors.
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 replaces crypto_pcomp_extsize function with
crypto_alg_extsize.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces crypto_shash_extsize function with
crypto_alg_extsize.
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>

This patch updates the documentation by including SEC1 into SEC2/3 doc
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

We add a specific compatible for SEC1, to handle the differences
between SEC1 and SEC2+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

SEC1 bugs on 0 data hash, so we submit an already padded block representing 0 data
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

SEC1 doesn't support scatter/gather, SEC1 doesn't handle link tables.
Therefore, for SEC1 we have to do it by SW. For that, we reserve
space at the end of the extended descriptor, in lieu of the space
reserved for the link tables on SEC2, and we perform sg_copy() when
preparing the descriptors

We also adapt the max buffer size which is only 32k on SEC1 while it
is 64k on SEC2+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adapts the interrupts handling and reset function for
SEC1. On SEC1, registers are almost similar to SEC2+, but bits
are sometimes located at different places. So we need to define
TALITOS1 and TALITOS2 versions of some fields, and manage according
to whether it is SEC1 or SEC2.

On SEC1, only one interrupt vector is dedicated to the SEC, so only
interrupt_4ch is needed.

On SEC1, interrupts are enabled by clearing related bits in IMR,
while on SEC2, interrupts are enabled by seting the bits in IMR.

SEC1 also performs parity verification in the DES Unit. We have
to disable this feature because the test vectors provided in
the kernel have parity errors.

In reset functions, only SEC2 supports continuation after error.
For SEC1, we have to reset in all cases.

For errors handling, SEC2+ names have been kept, but displayed
text have been amended to reflect exact meaning on SEC1.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

SEC 1.0, 1.2 and 2.x+ have different EU base addresses, so we need to
define pointers for each EU in the driver private data structure.
The proper address is set by the probe function depending on the
SEC type, in order to provide access to the proper address.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

SEC1 descriptor is a bit different to SEC2+ descriptor.
talitos_submit() will have to copy hdr field into hdr1 field and
send the descriptor starting at hdr1 up to next_desc.
For SEC2, it remains unchanged and next_desc is just ignored.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

talitos descriptor is slightly different for SEC1 and SEC2+, so
lets the helper function that fills the descriptor take into account
the type of SEC.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

We add a new feature in the features field, to mark compatible
"fsl,sec1.0"
We also define a helper function called has_ftr_sec1() to help
functions quickly determine if they are running on SEC1 or SEC2+.
When only SEC1 or SEC2 is compiled in, has_ftr_sec1() return
trivial corresponding value. If both are compiled in, feature
field is checked.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adds a CONFIG option to select SEC1, SEC2+ or both.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch enhances the talitos_desc struct with fields for SEC1.
SEC1 has only one header field, and has a 'next_desc' field in
addition.
This mixed descriptor will continue to fit SEC2, and for SEC1
we will recopy hdr value into hdr1 value in talitos_submit()
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adds a helper function for reads and writes of the len
param of the talitos descriptor. This will help implement
SEC1 later.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

map_single_talitos_ptr() is always called with extent == 0, so lets remove this unused parameter
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

j_extent field is specific to SEC2 so we add a helper function to clear it
so that SEC1 can redefine that function as nop
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Linux CodyingStyle recommends to use short variables for local
variables. ptr is just good enough for those 3 lines functions.
It helps keep single lines shorter than 80 characters.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch refactors the handling of the input and output data that is quite
similar in several functions
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Do use zero_entry value to init the descriptors ptrs to zero instead of
writing 0 in each field
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
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>

backlog is not initialised so in the case where
cpg->eng_st != ENGINE_IDLE it is never initialised and
hence which could lead to an illegal memory dereference
in the statement:

  backlog->complete(backlog, -EINPROGRESS);

Discovered with cppcheck static analsys:
[drivers/crypto/mv_cesa.c:616]:
   (error) Uninitialized variable: backlog
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>