Add RSA support to caam driver.

Initial author is Yashpal Dutta <yashpal.dutta@freescale.com>.
Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Report correct error in case of failure
Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Drop all asn1 related code and use the new rsa_helper
functions rsa_parse_[pub|priv]_key for parsing the key
Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Use the vector polynomial multiply-sum instructions in POWER8 to
speed up crc32c.

This is just over 41x faster than the slice-by-8 method that it
replaces. Measurements on a 4.1 GHz POWER8 show it sustaining
52 GiB/sec.

A simple btrfs write performance test:

    dd if=/dev/zero of=/mnt/tmpfile bs=1M count=4096
    sync

is over 3.7x faster.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

gcc provides FUNC_START/FUNC_END macros to help with creating
assembly functions. Mirror these in the kernel so we can more easily
share code between userspace and the kernel. FUNC_END is just a
stub since we don't currently annotate the end of kernel functions.

It might make sense to do a wholesale search and replace, but for
now just create a couple of defines.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

As the software RSA implementation now produces fixed-length
output, we need to eliminate leading zeros in the calling code
instead.

This patch does just that for pkcs1pad signature verification.

Fixes: 9b45b7bb ("crypto: rsa - Generate fixed-length output")
Reported-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adds HMAC-SHA3 test modes in tcrypt module
and related test vectors.
Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The arm-neon-sha implementations have cra_priority of 150...300, so
increase omap-sham priority to 400 to ensure it is on top of any
software alg.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The multibuffer hash speed test is incorrectly bailing because
of an EINPROGRESS return value.  This patch fixes it by setting
ret to zero if it is equal to -EINPROGRESS.
Reported-by: Megha Dey <megha.dey@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

In the vast majority of cases (2^-32 on 32-bit and 2^-64 on 64-bit)
cases, the result from encryption/signing will require no padding.

This patch makes these two operations write their output directly
to the final destination.  Only in the exceedingly rare cases where
fixup is needed to we copy it out and back to add the leading zeroes.

This patch also makes use of the crypto_akcipher_set_crypt API
instead of writing the akcipher request directly.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Rather than repeatedly checking the key size on each operation,
we should be checking it once when the key is set.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

We don't currently support using akcipher in atomic contexts,
so GFP_KERNEL should always be used.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The helper pkcs1pad_sg_set_buf tries to split a buffer that crosses
a page boundary into two SG entries.  This is unnecessary.  This
patch removes that.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The only user of rsa-pkcs1pad always uses the hash so there is
no reason to support the case of not having a hash.

This patch also changes the digest info lookup so that it is
only done once during template instantiation rather than on each
operation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Currently the mpi SG helpers use sg_virt which is completely
broken.  It happens to work with normal kernel memory but will
fail with anything that is not linearly mapped.

This patch fixes this by using the SG iterator helpers.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Every implementation of RSA that we have naturally generates
output with leading zeroes.  The one and only user of RSA,
pkcs1pad wants to have those leading zeroes in place, in fact
because they are currently absent it has to write those zeroes
itself.

So we shouldn't be stripping leading zeroes in the first place.
In fact this patch makes rsa-generic produce output with fixed
length so that pkcs1pad does not need to do any extra work.

This patch also changes DH to use the new interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch allows RSA implementations to produce output with
leading zeroes.  testmgr will skip leading zeroes when comparing
the output.

This patch also tries to make the RSA test function generic enough
to potentially handle other akcipher algorithms.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adds speed tests for cts(cbc(aes)).
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adds the helper crypto_inst_setname because the current
helper crypto_alloc_instance2 is no longer useful given that we
now look up the algorithm after we allocate the instance object.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces use of the obsolete blkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces use of the obsolete ablkcipher with skcipher.

It also removes shash_fallback which is totally unused.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces use of the obsolete ablkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces use of the obsolete ablkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces use of the obsolete ablkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch replaces use of the obsolete ablkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Currently aesni uses an async ctr(aes) to derive the rfc4106
subkey, which was presumably copied over from the generic rfc4106
code.  Over there it's done that way because we already have a
ctr(aes) spawn.  But it is simply overkill for aesni since we
have to go get a ctr(aes) from scratch anyway.

This patch simplifies the subkey derivation by using a straight
aes cipher instead.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch converts tcrypt to use the new skcipher interface as
opposed to ablkcipher/blkcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The function crypto_ahash_extsize did not include padding when
computing the tfm context size.  This patch fixes this by using
the generic crypto_alg_extsize helper.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

As it is, if you get an async ahash with a sync skcipher you'll
end up with a sync authenc, which is wrong.

This patch fixes it by considering the ASYNC bit from ahash as
well.

It also fixes a little bug where if a sync version of authenc
is requested we may still end up using an async ahash.

Neither of them should have any effect as none of the authenc
users can request for a sync authenc.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Remove redundant sg_init_table call. scatterwalk_ffwd doing the same.
Signed-off-by: Harsh Jain <harshjain.prof@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch resolves a number of issues with the mb speed test
function:

* The tfm is never freed.
* Memory is allocated even when we're not using mb.
* When an error occurs we don't wait for completion for other requests.
* When an error occurs during allocation we may leak memory.
* The test function ignores plen but still runs for plen != blen.
* The backlog flag is incorrectly used (may crash).

This patch tries to resolve all these issues as well as making
the code consistent with the existing hash speed testing function.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

For the timescales we are working against there is no need to
go beyond unsigned long.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The recently added test_mb_ahash_speed() has clearly serious coding
style issues. Try to fix some of them:
1. Don't mix pr_err() and printk();
2. Don't wrap strings;
3. Properly align goto statement in if() block;
4. Align wrapped arguments on new line;
5. Don't wrap functions on first argument;
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Add a new mode to calculate the speed of the sha512_mb algorithm
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch introduces the assembly routines to do SHA512 computation on
buffers belonging to several jobs at once. The assembly routines are
optimized with AVX2 instructions that have 4 data lanes and using AVX2
registers.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch introduces the data structures and prototypes of functions
needed for computing SHA512 hash using multi-buffer. Included are the
structures of the multi-buffer SHA512 job, job scheduler in C and x86
assembly.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch introduces the routines used to submit and flush buffers
belonging to SHA512 crypto jobs to the SHA512 multibuffer algorithm.
It is implemented mostly in assembly optimized with AVX2 instructions.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Add the config CRYPTO_SHA512_MB which will enable the computation
using the SHA512 multi-buffer algorithm.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch introduces the multi-buffer job manager which is responsible
for submitting scatter-gather buffers from several SHA512 jobs to the
multi-buffer algorithm. It also contains the flush routine that's called
by the crypto daemon to complete the job when no new jobs arrive before
the deadline of maximum latency of a SHA512 crypto job.

The SHA512 multi-buffer crypto algorithm is defined and initialized in this
patch.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The ARM allmodconfig build currently warngs because of the
ux500 crypto driver not working well with the jump label
implementation that we started using for dynamic debug, which
breaks building with 'gcc -O0':

In file included from /git/arm-soc/include/linux/jump_label.h:105:0,
                 from /git/arm-soc/include/linux/dynamic_debug.h:5,
                 from /git/arm-soc/include/linux/printk.h:289,
                 from /git/arm-soc/include/linux/kernel.h:13,
                 from /git/arm-soc/include/linux/clk.h:16,
                 from /git/arm-soc/drivers/crypto/ux500/hash/hash_core.c:16:
/git/arm-soc/arch/arm/include/asm/jump_label.h: In function 'hash_set_dma_transfer':
/git/arm-soc/arch/arm/include/asm/jump_label.h:13:7: error: asm operand 0 probably doesn't match constraints [-Werror]
  asm_volatile_goto("1:\n\t"

Turning off compiler optimizations has never really been supported
here, and it's only used when debugging the driver. I have not found
a good reason for doing this here, other than a misguided attempt
to produce more readable assembly output. Also, the driver is only
used in obsolete hardware that almost certainly nobody will spend
time debugging any more.

This just removes the -O0 flag from the compiler options.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>