| Commit message (Collapse) | Author | Age | Files | Lines |
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This patch fixes an old bug where requests can be reordered because
some are processed by cryptd while others are processed directly
in softirq context.
The fix is to always postpone to cryptd if there are currently
requests outstanding from the same tfm.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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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>
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This patch commit 5cec70e9bcd56bf924c6b08cad3db16fb54e1c0d as
it is only a workaround for the real bug and the proper fix has
now been applied as af900a7ee6a17784a9a343421ef0e3fe67f264fc
("crypto: user - re-add size check for CRYPTO_MSG_GETALG").
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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We accidentally return PTR_ERR(NULL) which is success but we should
return -ENOMEM.
Fixes: 1d55d90cae20 ('crypto: drbg - use CTR AES instead of ECB AES')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Added support for SHA-3 algorithm test's
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>
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This patch adds the implementation of SHA3 algorithm
in software and it's based on original implementation
pushed in patch https://lwn.net/Articles/518415/ with
additional changes to match the padding rules specified
in SHA-3 specification.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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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>
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crypto/drbg.c:1637:39-40: Unneeded semicolon
Remove unneeded semicolon.
Generated by: scripts/coccinelle/misc/semicolon.cocci
CC: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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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>
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The TFM object maintains the key for the CTR DRBG.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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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>
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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>
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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>
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Remove unused header cpumask.h from crypto/ablkcipher.c.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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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>
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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>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"This fixes a sporadic build failure in the qat driver as well as a
memory corruption bug in rsa-pkcs1pad"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: rsa-pkcs1pad - fix rsa-pkcs1pad request struct
crypto: qat - make qat_asym_algs.o depend on asn1 headers
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To allow for child request context the struct akcipher_request child_req
needs to be at the end of the structure.
Cc: stable@vger.kernel.org
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Arbitrary X.509 certificates without authority key identifiers (AKIs)
can be added to "trusted" keyrings, including IMA or EVM certs loaded
from the filesystem. Signature verification is currently bypassed for
certs without AKIs.
Trusted keys were recently refactored, and this bug is not present in
4.6.
restrict_link_by_signature should return -ENOKEY (no matching parent
certificate found) if the certificate being evaluated has no AKIs,
instead of bypassing signature checks and returning 0 (new certificate
accepted).
Reported-by: Petko Manolov <petkan@mip-labs.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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Commit b8cc7ddcdc forgot to set digest_len and thus cause the following
error reported by kexec when launching a crash kernel:
kexec_file_load failed: Bad message
Fixes: b8cc7ddcdc (KEYS: Generalise system_verify_data() to provide access to internal content)
Signed-off-by: Lans Zhang <jia.zhang@windriver.com>
Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
cc: kexec@lists.infradead.org
cc: linux-crypto@vger.kernel.org
Signed-off-by: James Morris <james.l.morris@oracle.com>
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This fix resolves the following kernel panic if an empty or missing
AuthorityKeyIdentifier is encountered and DEBUG is defined in
pkcs7_verify.c.
[ 459.041989] PKEY: <==public_key_verify_signature() = 0
[ 459.041993] PKCS7: Verified signature 1
[ 459.041995] PKCS7: ==> pkcs7_verify_sig_chain()
[ 459.041999] PKCS7: verify Sample DB Certificate for SCP: 01
[ 459.042002] PKCS7: - issuer Sample KEK Certificate for SCP
[ 459.042014] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 459.042135] IP: [<ffffffff813e7b4c>] pkcs7_verify+0x72c/0x7f0
[ 459.042217] PGD 739e6067 PUD 77719067 PMD 0
[ 459.042286] Oops: 0000 [#1] PREEMPT SMP
[ 459.042328] Modules linked in:
[ 459.042368] CPU: 0 PID: 474 Comm: kexec Not tainted 4.7.0-rc7-WR8.0.0.0_standard+ #18
[ 459.042462] Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 10/09/2014
[ 459.042586] task: ffff880073a50000 ti: ffff8800738e8000 task.ti: ffff8800738e8000
[ 459.042675] RIP: 0010:[<ffffffff813e7b4c>] [<ffffffff813e7b4c>] pkcs7_verify+0x72c/0x7f0
[ 459.042784] RSP: 0018:ffff8800738ebd58 EFLAGS: 00010246
[ 459.042845] RAX: 0000000000000000 RBX: ffff880076b7da80 RCX: 0000000000000006
[ 459.042929] RDX: 0000000000000001 RSI: ffffffff81c85001 RDI: ffffffff81ca00a9
[ 459.043014] RBP: ffff8800738ebd98 R08: 0000000000000400 R09: ffff8800788a304c
[ 459.043098] R10: 0000000000000000 R11: 00000000000060ca R12: ffff8800769a2bc0
[ 459.043182] R13: ffff880077358300 R14: 0000000000000000 R15: ffff8800769a2dc0
[ 459.043268] FS: 00007f24cc741700(0000) GS:ffff880074e00000(0000) knlGS:0000000000000000
[ 459.043365] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 459.043431] CR2: 0000000000000000 CR3: 0000000073a36000 CR4: 00000000001006f0
[ 459.043514] Stack:
[ 459.043530] 0000000000000000 ffffffbf00000020 31ffffff813e68b0 0000000000000002
[ 459.043644] ffff8800769a2bc0 0000000000000000 00000000007197b8 0000000000000002
[ 459.043756] ffff8800738ebdd8 ffffffff81153fb1 0000000000000000 0000000000000000
[ 459.043869] Call Trace:
[ 459.043898] [<ffffffff81153fb1>] verify_pkcs7_signature+0x61/0x140
[ 459.043974] [<ffffffff813e7f0b>] verify_pefile_signature+0x2cb/0x830
[ 459.044052] [<ffffffff813e8470>] ? verify_pefile_signature+0x830/0x830
[ 459.044134] [<ffffffff81048e25>] bzImage64_verify_sig+0x15/0x20
[ 459.046332] [<ffffffff81046e09>] arch_kexec_kernel_verify_sig+0x29/0x40
[ 459.048552] [<ffffffff810f10e4>] SyS_kexec_file_load+0x1f4/0x6c0
[ 459.050768] [<ffffffff81050e36>] ? __do_page_fault+0x1b6/0x550
[ 459.052996] [<ffffffff8199241f>] entry_SYSCALL_64_fastpath+0x17/0x93
[ 459.055242] Code: e8 0a d6 ff ff 85 c0 0f 88 7a fb ff ff 4d 39 fd 4d 89 7d 08 74 45 4d 89 fd e9 14 fe ff ff 4d 8b 76 08 31 c0 48 c7 c7 a9 00 ca 81 <41> 0f b7 36 49 8d 56 02 e8 d0 91 d6 ff 4d 8b 3c 24 4d 85 ff 0f
[ 459.060535] RIP [<ffffffff813e7b4c>] pkcs7_verify+0x72c/0x7f0
[ 459.063040] RSP <ffff8800738ebd58>
[ 459.065456] CR2: 0000000000000000
[ 459.075998] ---[ end trace c15f0e897cda28dc ]---
Signed-off-by: Lans Zhang <jia.zhang@windriver.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
cc: linux-crypto@vger.kernel.org
cc: kexec@lists.infradead.org
Signed-off-by: James Morris <james.l.morris@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"Two regression fixes:
- a regression when handling VIDIOC_CROPCAP at the media core;
- a regression at adv7604 that was ignoring pad number in subdev ops"
* tag 'media/v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] adv7604: Don't ignore pad number in subdev DV timings pad operations
[media] v4l2-ioctl: fix stupid mistake in cropcap condition
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Linux 4.7-rc2
* tag 'v4.7-rc2': (10914 commits)
Linux 4.7-rc2
devpts: Make each mount of devpts an independent filesystem.
parisc: Move die_if_kernel() prototype into traps.h header
parisc: Fix pagefault crash in unaligned __get_user() call
parisc: Fix printk time during boot
parisc: Fix backtrace on PA-RISC
mm, page_alloc: recalculate the preferred zoneref if the context can ignore memory policies
mm, page_alloc: reset zonelist iterator after resetting fair zone allocation policy
mm, oom_reaper: do not use siglock in try_oom_reaper()
mm, page_alloc: prevent infinite loop in buffered_rmqueue()
checkpatch: reduce git commit description style false positives
mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup
memcg: add RCU locking around css_for_each_descendant_pre() in memcg_offline_kmem()
mm: check the return value of lookup_page_ext for all call sites
kdump: fix dmesg gdbmacro to work with record based printk
mm: fix overflow in vm_map_ram()
Btrfs: deal with duplciates during extent_map insertion in btrfs_get_extent
arm64: fix alignment when RANDOMIZE_TEXT_OFFSET is enabled
arm64: move {PAGE,CONT}_SHIFT into Kconfig
arm64: mm: dump: log span level
...
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Commit 95c2e811146e ("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: 95c2e811146e ("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>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
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
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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>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"Another quiet release for SPI, almost entirely driver specific changes
with the diffstat dominated by two new drivers which are about two
thirds of it in terms of lines of code:
- new drivers for PIC32 standard and SQI controllers
- the Cadence driver has had runtime PM support added and quite a few
fixes and cleanups
- flash-specific accelerated path support now has a feature query
interface
- the pxa2xx driver has been moved to use the core DMA mapping support"
* tag 'spi-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (48 commits)
spi: pic32-sqi: Fix linker error, undefined reference to `bad_dma_ops'
spi: dw-pci: Spelling s/paltforms/platforms/g
spi: pic32-sqi: Remove pic32_sqi_setup and pic32_sqi_cleanup
spi: Fix simple typo s/impelment/implement
spi: rockchip: potential NULL dereference on error
spi: zynqmp: disable clocks in error paths
spi: Drop unnecessary dependencies on relaxed I/O accessors
spi: qup: Add spi_master_put in remove function
spi: qup: Handle clocks in pm_runtime suspend and resume
spi: st-ssc4: Fix missing spi_master_put in spi_st_probe error paths
spi: st-ssc4: Allow compile test build
spi: omap2-mcspi: Use dma_request_chan() for requesting DMA channel
spi: davinci: Use dma_request_chan() for requesting DMA channel
spi: pic32: Fix checking return value of devm_ioremap_resource
spi: spi-fsl-dspi: Update DT binding documentation
spi: Drop duplicate code to set master->dev.parent
spi: pic32: Set proper bits_per_word_mask
spi: return error if kmap'd buffers passed to spi_map_buf()
spi: core: add hook flash_read_supported to spi_master
spi: pic32-sqi: silence array overflow warning
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'spi/topic/rockchip', 'spi/topic/st-ssc4' and 'spi/topic/xlp' into spi-next
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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>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
====================
wireless-drivers patches for 4.7
Major changes:
iwlwifi
* remove IWLWIFI_DEBUG_EXPERIMENTAL_UCODE kconfig option
* work for RX multiqueue continues
* dynamic queue allocation work continues
* add Luca as maintainer
* a bunch of fixes and improvements all over
brcmfmac
* add 4356 sdio support
ath6kl
* add ability to set debug uart baud rate with a module parameter
wil6210
* add debugfs file to configure firmware led functionality
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next
* work for RX multiqueue continues (Sara);
* dynamic queue allocation work continues (Liad);
* add Luca as maintainer;
* a bunch of fixes and improvements all over;
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next into master
To synchronize with Kalle, here's just a big change that affects
all drivers - removing the duplicated enum ieee80211_band and
replacing it by enum nl80211_band. On top of that, just a small
documentation update.
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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
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
...
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Move the point at which a key is determined to be trustworthy to
__key_link() so that we use the contents of the keyring being linked in to
to determine whether the key being linked in is trusted or not.
What is 'trusted' then becomes a matter of what's in the keyring.
Currently, the test is done when the key is parsed, but given that at that
point we can only sensibly refer to the contents of the system trusted
keyring, we can only use that as the basis for working out the
trustworthiness of a new key.
With this change, a trusted keyring is a set of keys that once the
trusted-only flag is set cannot be added to except by verification through
one of the contained keys.
Further, adding a key into a trusted keyring, whilst it might grant
trustworthiness in the context of that keyring, does not automatically
grant trustworthiness in the context of a second keyring to which it could
be secondarily linked.
To accomplish this, the authentication data associated with the key source
must now be retained. For an X.509 cert, this means the contents of the
AuthorityKeyIdentifier and the signature data.
If system keyrings are disabled then restrict_link_by_builtin_trusted()
resolves to restrict_link_reject(). The integrity digital signature code
still works correctly with this as it was previously using
KEY_FLAG_TRUSTED_ONLY, which doesn't permit anything to be added if there
is no system keyring against which trust can be determined.
Signed-off-by: David Howells <dhowells@redhat.com>
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Make the system trusted keyring depend on the asymmetric key type as
there's not a lot of point having it if you can't then load asymmetric keys
onto it.
This requires the ASYMMETRIC_KEY_TYPE to be made a bool, not a tristate, as
the Kconfig language doesn't then correctly force ASYMMETRIC_KEY_TYPE to
'y' rather than 'm' if SYSTEM_TRUSTED_KEYRING is 'y'.
Making SYSTEM_TRUSTED_KEYRING *select* ASYMMETRIC_KEY_TYPE instead doesn't
work as the Kconfig interpreter then wrongly complains about dependency
loops.
Signed-off-by: David Howells <dhowells@redhat.com>
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Move the X.509 trust validation code out to its own file so that it can be
generalised.
Signed-off-by: David Howells <dhowells@redhat.com>
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We should call verify_signature() rather than directly calling
public_key_verify_signature() if we have a struct key to use as we
shouldn't be poking around in the private data of the key struct as that's
subtype dependent.
Signed-off-by: David Howells <dhowells@redhat.com>
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Generalise x509_request_asymmetric_key(). It doesn't really have any
dependencies on X.509 features as it uses generalised IDs and the
public_key structs that contain data extracted from X.509.
Signed-off-by: David Howells <dhowells@redhat.com>
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Move x509_request_asymmetric_key() to asymmetric_type.c so that it can be
generalised.
Signed-off-by: David Howells <dhowells@redhat.com>
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Make the determination of the trustworthiness of a key dependent on whether
a key that can verify it is present in the supplied ring of trusted keys
rather than whether or not the verifying key has KEY_FLAG_TRUSTED set.
verify_pkcs7_signature() will return -ENOKEY if the PKCS#7 message trust
chain cannot be verified.
Signed-off-by: David Howells <dhowells@redhat.com>
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Generalise system_verify_data() to provide access to internal content
through a callback. This allows all the PKCS#7 stuff to be hidden inside
this function and removed from the PE file parser and the PKCS#7 test key.
If external content is not required, NULL should be passed as data to the
function. If the callback is not required, that can be set to NULL.
The function is now called verify_pkcs7_signature() to contrast with
verify_pefile_signature() and the definitions of both have been moved into
linux/verification.h along with the key_being_used_for enum.
Signed-off-by: David Howells <dhowells@redhat.com>
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There's a bug in the code determining whether a certificate is self-signed
or not: if they have neither AKID nor SKID then we just assume that the
cert is self-signed, which may not be true.
Fix this by checking that the raw subject name matches the raw issuer name
and that the public key algorithm for the key and signature are both the
same in addition to requiring that the AKID bits match.
Signed-off-by: David Howells <dhowells@redhat.com>
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Extract the signature digest for an X.509 certificate earlier, at the end
of x509_cert_parse() rather than leaving it to the callers thereof since it
has to be called anyway.
Further, immediately after that, check the signature on self-signed
certificates, also rather in the callers of x509_cert_parse().
We note in the x509_certificate struct the following bits of information:
(1) Whether the signature is self-signed (even if we can't check the
signature due to missing crypto).
(2) Whether the key held in the certificate needs unsupported crypto to be
used. We may get a PKCS#7 message with X.509 certs that we can't make
use of - we just ignore them and give ENOPKG at the end it we couldn't
verify anything if at least one of these unusable certs are in the
chain of trust.
(3) Whether the signature held in the certificate needs unsupported crypto
to be checked. We can still use the key held in this certificate,
even if we can't check the signature on it - if it is held in the
system trusted keyring, for instance. We just can't add it to a ring
of trusted keys or follow it further up the chain of trust.
Making these checks earlier allows x509_check_signature() to be removed and
replaced with direct calls to public_key_verify_signature().
Signed-off-by: David Howells <dhowells@redhat.com>
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Point to the public_key_signature struct from the pkcs7_signed_info struct
rather than embedding it. This makes the code consistent with the X.509
signature handling and makes it possible to have a common cleanup function.
We also save a copy of the digest in the signature without sharing the
memory with the crypto layer metadata.
Signed-off-by: David Howells <dhowells@redhat.com>
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Retain the key verification data (ie. the struct public_key_signature)
including the digest and the key identifiers.
Note that this means that we need to take a separate copy of the digest in
x509_get_sig_params() rather than lumping it in with the crypto layer data.
Signed-off-by: David Howells <dhowells@redhat.com>
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Add key identifier pointers to public_key_signature struct so that they can
be used to retain the identifier of the key to be used to verify the
signature in both PKCS#7 and X.509.
Signed-off-by: David Howells <dhowells@redhat.com>
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Allow authentication data to be stored in an asymmetric key in the 4th
element of the key payload and provide a way for it to be destroyed.
For the public key subtype, this will be a public_key_signature struct.
Signed-off-by: David Howells <dhowells@redhat.com>
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Clean up some whitespace.
Signed-off-by: David Howells <dhowells@redhat.com>
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