Rewrite the bitwise operations to silence the sparse warnings:
CHECK ../crypto/ecc.c
../crypto/ecc.c:1387:39: warning: dubious: !x | y
../crypto/ecc.c:1397:47: warning: dubious: !x | y
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch does the final flag day conversion of all completion
functions which are now all contained in the Crypto API.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Use the akcipher_request_complete helper instead of calling the
completion function directly. In fact the previous code was buggy
in that EINPROGRESS was never passed back to the original caller.
Fixes: 3d5b1ecdea ("crypto: rsa - RSA padding algorithm")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Use the crypto_request_complete helper instead of calling the
completion function directly.
This patch also removes the voodoo programming previously used
for unaligned ahash operations and replaces it with a sub-request.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
AEAD reuses the existing request object for its child. This is
error-prone and unnecessary. This patch adds a subrequest object
just like we do for skcipher and hash.
This patch also restores the original completion function as we
do for skcipher/hash.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This type of request is often happened in AF_ALG cases.
So add this vector in default cipher config array.
Signed-off-by: Zhang Yiqun <zhangyiqun@phytium.com.cn>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This reverts commit 1ca2809897.
While the akcipher API as a whole is designed to be called only
from thread context, its completion path is still called from
softirq context as usual. Therefore we must not use GFP_KERNEL
on that path.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
As it is xts only handles the special return value of EINPROGRESS,
which means that in all other cases it will free data related to the
request.
However, as the caller of xts may specify MAY_BACKLOG, we also need
to expect EBUSY and treat it in the same way. Otherwise backlogged
requests will trigger a use-after-free.
Fixes: 8083b1bf81 ("crypto: xts - add support for ciphertext stealing")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Previously the child skcipher request was stored on the stack and
therefore needed to be zeroed. As it is now dynamically allocated
we no longer need to do so.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
According to FIPS 140-3 IG, section D.R "Hash Functions Acceptable for
Use in the SP 800-90A DRBGs", modules certified after May 16th, 2023
must not support the use of: SHA-224, SHA-384, SHA512-224, SHA512-256,
SHA3-224, SHA3-384. Disallow HMAC and HASH DRBGs using SHA-384 in FIPS
mode.
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Reviewed-by: Stephan Müller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
As it is seqiv only handles the special return value of EINPROGERSS,
which means that in all other cases it will free data related to the
request.
However, as the caller of seqiv may specify MAY_BACKLOG, we also need
to expect EBUSY and treat it in the same way. Otherwise backlogged
requests will trigger a use-after-free.
Fixes: 0a270321db ("[CRYPTO] seqiv: Add Sequence Number IV Generator")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
As it is essiv only handles the special return value of EINPROGERSS,
which means that in all other cases it will free data related to the
request.
However, as the caller of essiv may specify MAY_BACKLOG, we also need
to expect EBUSY and treat it in the same way. Otherwise backlogged
requests will trigger a use-after-free.
Fixes: be1eb7f78a ("crypto: essiv - create wrapper template...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
RFC4106 wraps AES in GCM mode, and can be used with larger key sizes
than 128/160 bits, just like AES itself. So add these to the tcrypt
recipe so they will be benchmarked as well.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The skcipher walk API implementation avoids scatterwalk_map() for
mapping the source and destination buffers, and invokes kmap_atomic()
directly if the buffer in question is not in low memory (which can only
happen on 32-bit architectures). This avoids some overhead on 64-bit
architectures, and most notably, permits the skcipher code to run with
preemption enabled.
Now that scatterwalk_map() has been updated to use kmap_local(), none of
this is needed, so we can simply use scatterwalk_map/unmap instead.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
aria-avx assembly code accesses members of aria_ctx with magic number
offset. If the shape of struct aria_ctx is changed carelessly,
aria-avx will not work.
So, we need to ensure accessing members of aria_ctx with correct
offset values, not with magic numbers.
It adds ARIA_CTX_enc_key, ARIA_CTX_dec_key, and ARIA_CTX_rounds in the
asm-offsets.c So, correct offset definitions will be generated.
aria-avx assembly code can access members of aria_ctx safely with
these definitions.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The kernel provides implementations of the NIST ECDSA signature
verification primitives. For key sizes of 256 and 384 bits respectively
they are approved and can be enabled in FIPS mode. Do so.
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
ghash may be used only as part of the gcm(aes) construction in FIPS
mode. Since commit d6097b8d5d ("crypto: api - allow algs only in specific
constructions in FIPS mode") there's support for using spawns which by
itself are marked as non-approved from approved template instantiations.
So simply mark plain ghash as non-approved in testmgr to block any attempts
of direct instantiations in FIPS mode.
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
cbcmac(aes) may be used only as part of the ccm(aes) construction in FIPS
mode. Since commit d6097b8d5d ("crypto: api - allow algs only in specific
constructions in FIPS mode") there's support for using spawns which by
itself are marked as non-approved from approved template instantiations.
So simply mark plain cbcmac(aes) as non-approved in testmgr to block any
attempts of direct instantiations in FIPS mode.
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The memory sanitizer causes excessive register spills in this function:
crypto/wp512.c:782:13: error: stack frame size (2104) exceeds limit (2048) in 'wp512_process_buffer' [-Werror,-Wframe-larger-than]
Assume that this one is safe, and mark it as needing no checks to
get the stack usage back down to the normal level.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
kmap_atomic() is used to create short-lived mappings of pages that may
not be accessible via the kernel direct map. This is only needed on
32-bit architectures that implement CONFIG_HIGHMEM, but it can be used
on 64-bit other architectures too, where the returned mapping is simply
the kernel direct address of the page.
However, kmap_atomic() does not support migration on CONFIG_HIGHMEM
configurations, due to the use of per-CPU kmap slots, and so it disables
preemption on all architectures, not just the 32-bit ones. This implies
that all scatterwalk based crypto routines essentially execute with
preemption disabled all the time, which is less than ideal.
So let's switch scatterwalk_map/_unmap and the shash/ahash routines to
kmap_local() instead, which serves a similar purpose, but without the
resulting impact on preemption on architectures that have no need for
CONFIG_HIGHMEM.
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "Elliott, Robert (Servers)" <elliott@hpe.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
API:
- Optimise away self-test overhead when they are disabled.
- Support symmetric encryption via keyring keys in af_alg.
- Flip hwrng default_quality, the default is now maximum entropy.
Algorithms:
- Add library version of aesgcm.
- CFI fixes for assembly code.
- Add arm/arm64 accelerated versions of sm3/sm4.
Drivers:
- Remove assumption on arm64 that kmalloc is DMA-aligned.
- Fix selftest failures in rockchip.
- Add support for RK3328/RK3399 in rockchip.
- Add deflate support in qat.
- Merge ux500 into stm32.
- Add support for TEE for PCI ID 0x14CA in ccp.
- Add mt7986 support in mtk.
- Add MaxLinear platform support in inside-secure.
- Add NPCM8XX support in npcm.
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Merge tag 'v6.2-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Optimise away self-test overhead when they are disabled
- Support symmetric encryption via keyring keys in af_alg
- Flip hwrng default_quality, the default is now maximum entropy
Algorithms:
- Add library version of aesgcm
- CFI fixes for assembly code
- Add arm/arm64 accelerated versions of sm3/sm4
Drivers:
- Remove assumption on arm64 that kmalloc is DMA-aligned
- Fix selftest failures in rockchip
- Add support for RK3328/RK3399 in rockchip
- Add deflate support in qat
- Merge ux500 into stm32
- Add support for TEE for PCI ID 0x14CA in ccp
- Add mt7986 support in mtk
- Add MaxLinear platform support in inside-secure
- Add NPCM8XX support in npcm"
* tag 'v6.2-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (184 commits)
crypto: ux500/cryp - delete driver
crypto: stm32/cryp - enable for use with Ux500
crypto: stm32 - enable drivers to be used on Ux500
dt-bindings: crypto: Let STM32 define Ux500 CRYP
hwrng: geode - Fix PCI device refcount leak
hwrng: amd - Fix PCI device refcount leak
crypto: qce - Set DMA alignment explicitly
crypto: octeontx2 - Set DMA alignment explicitly
crypto: octeontx - Set DMA alignment explicitly
crypto: keembay - Set DMA alignment explicitly
crypto: safexcel - Set DMA alignment explicitly
crypto: hisilicon/hpre - Set DMA alignment explicitly
crypto: chelsio - Set DMA alignment explicitly
crypto: ccree - Set DMA alignment explicitly
crypto: ccp - Set DMA alignment explicitly
crypto: cavium - Set DMA alignment explicitly
crypto: img-hash - Fix variable dereferenced before check 'hdev->req'
crypto: arm64/ghash-ce - use frame_push/pop macros consistently
crypto: arm64/crct10dif - use frame_push/pop macros consistently
crypto: arm64/aes-modes - use frame_push/pop macros consistently
...
direction misannotations and (hopefully) preventing
more of the same for the future.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull iov_iter updates from Al Viro:
"iov_iter work; most of that is about getting rid of direction
misannotations and (hopefully) preventing more of the same for the
future"
* tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
use less confusing names for iov_iter direction initializers
iov_iter: saner checks for attempt to copy to/from iterator
[xen] fix "direction" argument of iov_iter_kvec()
[vhost] fix 'direction' argument of iov_iter_{init,bvec}()
[target] fix iov_iter_bvec() "direction" argument
[s390] memcpy_real(): WRITE is "data source", not destination...
[s390] zcore: WRITE is "data source", not destination...
[infiniband] READ is "data destination", not source...
[fsi] WRITE is "data source", not destination...
[s390] copy_oldmem_kernel() - WRITE is "data source", not destination
csum_and_copy_to_iter(): handle ITER_DISCARD
get rid of unlikely() on page_copy_sane() calls
Previously we limited the maximum alignment mask to 63. This
is mostly due to stack usage for shash. This patch introduces
a separate limit for shash algorithms and increases the general
limit to 127 which is the value that we need for DMA allocations
on arm64.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The helper crypto_tfm_ctx is only used by the Crypto API algorithm
code and should really be in algapi.h. However, for historical
reasons many files relied on it to be in crypto.h. This patch
changes those files to use algapi.h instead in prepartion for a
move.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
READ/WRITE proved to be actively confusing - the meanings are
"data destination, as used with read(2)" and "data source, as
used with write(2)", but people keep interpreting those as
"we read data from it" and "we write data to it", i.e. exactly
the wrong way.
Call them ITER_DEST and ITER_SOURCE - at least that is harder
to misinterpret...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This reverts commit 22ca9f4aaf because CFI
no longer breaks cross-module function address equality, so
crypto_shash_alg_has_setkey() can now be an inline function like before.
This commit should not be backported to kernels that don't have the new
CFI implementation.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
In the past, the data for mb-skcipher test has been allocated
twice, that means the first allcated memory area is without
free, which may cause a potential memory leakage. So this
patch is to remove one allocation to fix this error.
Fixes: e161c5930c ("crypto: tcrypt - add multibuf skcipher...")
Signed-off-by: Zhang Yiqun <zhangyiqun@phytium.com.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
When CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is set, the code in algboss.c
that handles CRYPTO_MSG_ALG_REGISTER is unnecessary, so make it be
compiled out.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Make the kdf_sp800108 self-test only print a message on success when
fips_enabled, so that it's consistent with testmgr.c and doesn't spam
the kernel log with a message that isn't really important.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Make kdf_sp800108 honor the CONFIG_CRYPTO_MANAGER_DISABLE_TESTS kconfig
option, so that it doesn't always waste time running its self-test.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The crypto_boot_test_finished static key is unnecessary when self-tests
are disabled in the kconfig, so optimize it out accordingly, along with
the entirety of crypto_start_tests(). This mainly avoids the overhead
of an unnecessary static_branch_enable() on every boot.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Since algboss always skips testing of algorithms with the
CRYPTO_ALG_INTERNAL flag, there is no need to go through the dance of
creating the test kthread, which creates a lot of overhead. Instead, we
can just directly finish the algorithm registration, like is now done
when self-tests are disabled entirely.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Currently, registering an algorithm with the crypto API always causes a
notification to be posted to the "cryptomgr", which then creates a
kthread to self-test the algorithm. However, if self-tests are disabled
in the kconfig (as is the default option), then this kthread just
notifies waiters that the algorithm has been tested, then exits.
This causes a significant amount of overhead, especially in the kthread
creation and destruction, which is not necessary at all. For example,
in a quick test I found that booting a "minimum" x86_64 kernel with all
the crypto options enabled (except for the self-tests) takes about 400ms
until PID 1 can start. Of that, a full 13ms is spent just doing this
pointless dance, involving a kthread being created, run, and destroyed
over 200 times. That's over 3% of the entire kernel start time.
Fix this by just skipping the creation of the test larval and the
posting of the registration notification entirely, when self-tests are
disabled.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Some sync algorithms may require a large amount of temporary
space during its operations. There is no reason why they should
be limited just because some legacy users want to place all
temporary data on the stack.
Such algorithms can now set a flag to indicate that they need
extra request context, which will cause them to be invisible
to users that go through the sync_skcipher interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
cryptd is buggy as it tries to use sync_skcipher without going
through the proper sync_skcipher interface. In fact it doesn't
even need sync_skcipher since it's already a proper skcipher and
can easily access the request context instead of using something
off the stack.
Fixes: 36b3875a97 ("crypto: cryptd - Remove VLA usage of skcipher")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
These cases were done with this Coccinelle:
@@
expression H;
expression L;
@@
- (get_random_u32_below(H) + L)
+ get_random_u32_inclusive(L, H + L - 1)
@@
expression H;
expression L;
expression E;
@@
get_random_u32_inclusive(L,
H
- + E
- - E
)
@@
expression H;
expression L;
expression E;
@@
get_random_u32_inclusive(L,
H
- - E
- + E
)
@@
expression H;
expression L;
expression E;
expression F;
@@
get_random_u32_inclusive(L,
H
- - E
+ F
- + E
)
@@
expression H;
expression L;
expression E;
expression F;
@@
get_random_u32_inclusive(L,
H
- + E
+ F
- - E
)
And then subsequently cleaned up by hand, with several automatic cases
rejected if it didn't make sense contextually.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This is a simple mechanical transformation done by:
@@
expression E;
@@
- prandom_u32_max
+ get_random_u32_below
(E)
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs
Reviewed-by: SeongJae Park <sj@kernel.org> # for damon
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> # for arm
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The gf128mul library does not depend on the crypto API at all, so it can
be moved into lib/crypto. This will allow us to use it in other library
code in a subsequent patch without having to depend on CONFIG_CRYPTO.
While at it, change the Kconfig symbol name to align with other crypto
library implementations. However, the source file name is retained, as
it is reflected in the module .ko filename, and changing this might
break things for users.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Added CTS-CBC/XTS/XCBC tests for SM4 algorithms, as well as
corresponding speed tests, this is to test performance-optimized
implementations of these modes.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch newly adds the test vectors of CTS-CBC/XTS/XCBC modes of
the SM4 algorithm, and also added some test vectors for SM4 GCM/CCM.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The top level print banners have a leading newline. It's not entirely
clear why this exists, but it makes it harder to parse tcrypt test output
using a script. Drop said newlines.
tcrypt output before this patch:
[...]
testing speed of rfc4106(gcm(aes)) (rfc4106-gcm-aesni) encryption
[...] test 0 (160 bit key, 16 byte blocks): 1 operation in 2320 cycles (16 bytes)
tcrypt output with this patch:
[...] testing speed of rfc4106(gcm(aes)) (rfc4106-gcm-aesni) encryption
[...] test 0 (160 bit key, 16 byte blocks): 1 operation in 2320 cycles (16 bytes)
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The pr_fmt() define includes KBUILD_MODNAME, and so there's no need
for pr_err() to also print it. Drop module name from the print string.
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Currently, there's mixed use of printk() and pr_info()/pr_err(). The latter
prints the module name (because pr_fmt() is defined so) but the former does
not. As a result there's inconsistency in the printed output. For example:
modprobe mode=211:
[...] test 0 (160 bit key, 16 byte blocks): 1 operation in 2320 cycles (16 bytes)
[...] test 1 (160 bit key, 64 byte blocks): 1 operation in 2336 cycles (64 bytes)
modprobe mode=215:
[...] tcrypt: test 0 (160 bit key, 16 byte blocks): 1 operation in 2173 cycles (16 bytes)
[...] tcrypt: test 1 (160 bit key, 64 byte blocks): 1 operation in 2241 cycles (64 bytes)
Replace all instances of printk() with pr_info()/pr_err() so that the
module name is printed consistently.
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
For some test cases, a line break gets inserted between the test banner
and the results. For example, with mode=211 this is the output:
[...]
testing speed of rfc4106(gcm(aes)) (rfc4106-gcm-aesni) encryption
[...] test 0 (160 bit key, 16 byte blocks):
[...] 1 operation in 2373 cycles (16 bytes)
--snip--
[...]
testing speed of gcm(aes) (generic-gcm-aesni) encryption
[...] test 0 (128 bit key, 16 byte blocks):
[...] 1 operation in 2338 cycles (16 bytes)
Similar behavior is seen in the following cases as well:
modprobe tcrypt mode=212
modprobe tcrypt mode=213
modprobe tcrypt mode=221
modprobe tcrypt mode=300 sec=1
modprobe tcrypt mode=400 sec=1
This doesn't happen with mode=215:
[...] tcrypt:
testing speed of multibuffer rfc4106(gcm(aes)) (rfc4106-gcm-aesni) encryption
[...] tcrypt: test 0 (160 bit key, 16 byte blocks): 1 operation in 2215 cycles (16 bytes)
--snip--
[...] tcrypt:
testing speed of multibuffer gcm(aes) (generic-gcm-aesni) encryption
[...] tcrypt: test 0 (128 bit key, 16 byte blocks): 1 operation in 2191 cycles (16 bytes)
This print inconsistency is because printk() is used instead of pr_cont()
in a few places. Change these to be pr_cont().
checkpatch warns that pr_cont() shouldn't be used. This can be ignored in
this context as tcrypt already uses pr_cont().
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
We want to leverage keyring to store sensitive keys, and then use those
keys for symmetric encryption via the crypto API. Among the key types we
wish to support are: user, logon, encrypted, and trusted.
User key types are already able to have their data copied to user space,
but logon does not support this. Further, trusted and encrypted keys will
return their encrypted data back to user space on read, which does not
make them ideal for symmetric encryption.
To support symmetric encryption for these key types, add a new
ALG_SET_KEY_BY_KEY_SERIAL setsockopt() option to the crypto API. This
allows users to pass a key_serial_t to the crypto API to perform
symmetric encryption. The behavior is the same as ALG_SET_KEY, but
the crypto key data is copied in kernel space from a keyring key,
which allows for the support of logon, encrypted, and trusted key types.
Keyring keys must have the KEY_(POS|USR|GRP|OTH)_SEARCH permission set
to leverage this feature. This follows the asymmetric_key type where key
lookup calls eventually lead to keyring_search_rcu() without the
KEYRING_SEARCH_NO_CHECK_PERM flag set.
Signed-off-by: Frederick Lawler <fred@cloudflare.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
