This patch adds helpers to check whether a given tfm is currently
queued. This is meant to be used by ablk_helper and similar
entities to ensure that no reordering is introduced because of
requests queued in cryptd with respect to requests being processed
in softirq context.
The per-cpu queue length limit is also increased to 1000 in line
with network limits.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch commit eed1e1afd8 as
it is only a workaround for the real bug and the proper fix has
now been applied as 055ddaace0
("crypto: user - re-add size check for CRYPTO_MSG_GETALG").
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Commit 9aa867e465 ("crypto: user - Add CRYPTO_MSG_DELRNG")
accidentally removed the minimum size check for CRYPTO_MSG_GETALG
netlink messages. This allows userland to send a truncated
CRYPTO_MSG_GETALG message as short as a netlink header only making
crypto_report() operate on uninitialized memory by accessing data
beyond the end of the netlink message.
Fix this be re-adding the minimum required size of CRYPTO_MSG_GETALG
messages to the crypto_msg_min[] array.
Fixes: 9aa867e465 ("crypto: user - Add CRYPTO_MSG_DELRNG")
Cc: stable@vger.kernel.org # v4.2
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
As it is if you ask for a sync gcm you may actually end up with
an async one because it does not filter out async implementations
of ghash.
This patch fixes this by adding the necessary filter when looking
for ghash.
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Return the raw key with no other processing so that the caller
can copy it or MPI parse it, etc.
The scope is to have only one ANS.1 parser for all RSA
implementations.
Update the RSA software implementation so that it does
the MPI conversion on top.
Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The CTR DRBG update function performs a full CTR AES operation including
the XOR with "plaintext" data. Hence, remove the XOR from the code and
use the CTR mode to do the XOR.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Hardware cipher implementation may require aligned buffers. All buffers
that potentially are processed with a cipher are now aligned.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The CTR DRBG derives its random data from the CTR that is encrypted with
AES.
This patch now changes the CTR DRBG implementation such that the
CTR AES mode is employed. This allows the use of steamlined CTR AES
implementation such as ctr-aes-aesni.
Unfortunately there are the following subtile changes we need to apply
when using the CTR AES mode:
- the CTR mode increments the counter after the cipher operation, but
the CTR DRBG requires the increment before the cipher op. Hence, the
crypto_inc is applied to the counter (drbg->V) once it is
recalculated.
- the CTR mode wants to encrypt data, but the CTR DRBG is interested in
the encrypted counter only. The full CTR mode is the XOR of the
encrypted counter with the plaintext data. To access the encrypted
counter, the patch uses a NULL data vector as plaintext to be
"encrypted".
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The CTR DRBG code always set the key for each sym cipher invocation even
though the key has not been changed.
The patch ensures that the setkey is only invoked when a new key is
generated by the DRBG.
With this patch, the CTR DRBG performance increases by more than 150%.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The CRYPTO_MSG_GETALG netlink message type provides a buffer to the
kernel to retrieve information from the kernel. The data buffer will not
provide any input and will not be read. Hence the nlmsg_parse is not
applicable to this netlink message type.
This patch fixes the following kernel log message when using this
netlink interface:
netlink: 208 bytes leftover after parsing attributes in process `XXX'.
Patch successfully tested with libkcapi from [1] which uses
CRYPTO_MSG_GETALG to obtain cipher-specific information from the kernel.
[1] http://www.chronox.de/libkcapi.html
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Pull crypto fixes from Herbert Xu:
"This fixes the following issues:
- missing selection in public_key that may result in a build failure
- Potential crash in error path in omap-sham
- ccp AES XTS bug that affects requests larger than 4096"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: ccp - Fix AES XTS error for request sizes above 4096
crypto: public_key: select CRYPTO_AKCIPHER
crypto: omap-sham - potential Oops on error in probe
Pull security subsystem updates from James Morris:
"Highlights:
- A new LSM, "LoadPin", from Kees Cook is added, which allows forcing
of modules and firmware to be loaded from a specific device (this
is from ChromeOS, where the device as a whole is verified
cryptographically via dm-verity).
This is disabled by default but can be configured to be enabled by
default (don't do this if you don't know what you're doing).
- Keys: allow authentication data to be stored in an asymmetric key.
Lots of general fixes and updates.
- SELinux: add restrictions for loading of kernel modules via
finit_module(). Distinguish non-init user namespace capability
checks. Apply execstack check on thread stacks"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (48 commits)
LSM: LoadPin: provide enablement CONFIG
Yama: use atomic allocations when reporting
seccomp: Fix comment typo
ima: add support for creating files using the mknodat syscall
ima: fix ima_inode_post_setattr
vfs: forbid write access when reading a file into memory
fs: fix over-zealous use of "const"
selinux: apply execstack check on thread stacks
selinux: distinguish non-init user namespace capability checks
LSM: LoadPin for kernel file loading restrictions
fs: define a string representation of the kernel_read_file_id enumeration
Yama: consolidate error reporting
string_helpers: add kstrdup_quotable_file
string_helpers: add kstrdup_quotable_cmdline
string_helpers: add kstrdup_quotable
selinux: check ss_initialized before revalidating an inode label
selinux: delay inode label lookup as long as possible
selinux: don't revalidate an inode's label when explicitly setting it
selinux: Change bool variable name to index.
KEYS: Add KEYCTL_DH_COMPUTE command
...
In some rare randconfig builds, we can end up with
ASYMMETRIC_PUBLIC_KEY_SUBTYPE enabled but CRYPTO_AKCIPHER disabled,
which fails to link because of the reference to crypto_alloc_akcipher:
crypto/built-in.o: In function `public_key_verify_signature':
:(.text+0x110e4): undefined reference to `crypto_alloc_akcipher'
This adds a Kconfig 'select' statement to ensure the dependency
is always there.
Cc: <stable@vger.kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Pull crypto update from Herbert Xu:
"API:
- Crypto self tests can now be disabled at boot/run time.
- Add async support to algif_aead.
Algorithms:
- A large number of fixes to MPI from Nicolai Stange.
- Performance improvement for HMAC DRBG.
Drivers:
- Use generic crypto engine in omap-des.
- Merge ppc4xx-rng and crypto4xx drivers.
- Fix lockups in sun4i-ss driver by disabling IRQs.
- Add DMA engine support to ccp.
- Reenable talitos hash algorithms.
- Add support for Hisilicon SoC RNG.
- Add basic crypto driver for the MXC SCC.
Others:
- Do not allocate crypto hash tfm in NORECLAIM context in ecryptfs"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (77 commits)
crypto: qat - change the adf_ctl_stop_devices to void
crypto: caam - fix caam_jr_alloc() ret code
crypto: vmx - comply with ABIs that specify vrsave as reserved.
crypto: testmgr - Add a flag allowing the self-tests to be disabled at runtime.
crypto: ccp - constify ccp_actions structure
crypto: marvell/cesa - Use dma_pool_zalloc
crypto: qat - make adf_vf_isr.c dependant on IOV config
crypto: qat - Fix typo in comments
lib: asn1_decoder - add MODULE_LICENSE("GPL")
crypto: omap-sham - Use dma_request_chan() for requesting DMA channel
crypto: omap-des - Use dma_request_chan() for requesting DMA channel
crypto: omap-aes - Use dma_request_chan() for requesting DMA channel
crypto: omap-des - Integrate with the crypto engine framework
crypto: s5p-sss - fix incorrect usage of scatterlists api
crypto: s5p-sss - Fix missed interrupts when working with 8 kB blocks
crypto: s5p-sss - Use common BIT macro
crypto: mxc-scc - fix unwinding in mxc_scc_crypto_register()
crypto: mxc-scc - signedness bugs in mxc_scc_ablkcipher_req_init()
crypto: talitos - fix ahash algorithms registration
crypto: ccp - Ensure all dependencies are specified
...
The PKCS#7 test key type should use the secondary keyring instead of the
built-in keyring if available as the source of trustworthy keys.
Signed-off-by: David Howells <dhowells@redhat.com>
As akcipher uses an SG interface, you must not use vmalloc memory
as input for it. This patch fixes testmgr to copy the vmalloc
test vectors to kmalloc memory before running the test.
This patch also removes a superfluous sg_virt call in do_test_rsa.
Cc: <stable@vger.kernel.org>
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Running self-tests for a short-lived KVM VM takes 28ms on my laptop.
This commit adds a flag 'cryptomgr.notests' which allows them to be
disabled.
However if fips=1 as well, we ignore this flag as FIPS mode mandates
that the self-tests are run.
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu
Mathias Krause
Dan Carpenter
raveendra padasalagi
Jeff Garzik
Wu Fengguang
Tudor Ambarus
Stephan Mueller
Geliang Tang
Linus Torvalds
James Morris
Arnd Bergmann
David Howells
Richard W.M. Jones
Tadeusz Struk