linux.git/security/integrity/ima/ima_crypto.c, branch v4.10.4

ima: platform-independent hash value

2016-12-20T17:48:46+00:00

For remote attestion it is important for the ima measurement values to
be platform-independent.  Therefore integer fields to be hashed must be
converted to canonical format.

Link: http://lkml.kernel.org/r/1480554346-29071-11-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Andreas Steffen 
Signed-off-by: Mimi Zohar 
Cc: Thiago Jung Bauermann 
Cc: "Eric W. Biederman" 
Cc: Dmitry Kasatkin 
Cc: Josh Sklar 
Cc: Dave Young 
Cc: Vivek Goyal 
Cc: Baoquan He 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Stewart Smith 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ima: calculate the hash of a buffer using aynchronous hash(ahash)

2016-02-18T22:14:44+00:00

Setting up ahash has some overhead.  Only use ahash to calculate the
hash of a buffer, if the buffer is larger than ima_ahash_minsize.

Signed-off-by: Mimi Zohar 
Acked-by: Dmitry Kasatkin

ima: provide buffer hash calculation function

2016-02-18T22:14:28+00:00

This patch provides convenient buffer hash calculation function.

Changelog v3:
- fix while hash calculation - Dmitry
v1:
- rewrite to support loff_t sized buffers - Mimi
  (based on Fenguang Wu's testing)

Signed-off-by: Dmitry Kasatkin 
Signed-off-by: Mimi Zohar

ima: separate 'security.ima' reading functionality from collect

2016-02-18T22:13:32+00:00

Instead of passing pointers to pointers to ima_collect_measurent() to
read and return the 'security.ima' xattr value, this patch moves the
functionality to the calling process_measurement() to directly read
the xattr and pass only the hash algo to the ima_collect_measurement().

Signed-off-by: Dmitry Kasatkin 
Signed-off-by: Mimi Zohar

mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM

2015-11-07T01:50:42+00:00

__GFP_WAIT was used to signal that the caller was in atomic context and
could not sleep.  Now it is possible to distinguish between true atomic
context and callers that are not willing to sleep.  The latter should
clear __GFP_DIRECT_RECLAIM so kswapd will still wake.  As clearing
__GFP_WAIT behaves differently, there is a risk that people will clear the
wrong flags.  This patch renames __GFP_WAIT to __GFP_RECLAIM to clearly
indicate what it does -- setting it allows all reclaim activity, clearing
them prevents it.

[akpm@linux-foundation.org: fix build]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Mel Gorman 
Acked-by: Michal Hocko 
Acked-by: Vlastimil Babka 
Acked-by: Johannes Weiner 
Cc: Christoph Lameter 
Acked-by: David Rientjes 
Cc: Vitaly Wool 
Cc: Rik van Riel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kernel/params: constify struct kernel_param_ops uses

2015-05-28T02:02:10+00:00

Most code already uses consts for the struct kernel_param_ops,
sweep the kernel for the last offending stragglers. Other than
include/linux/moduleparam.h and kernel/params.c all other changes
were generated with the following Coccinelle SmPL patch. Merge
conflicts between trees can be handled with Coccinelle.

In the future git could get Coccinelle merge support to deal with
patch --> fail --> grammar --> Coccinelle --> new patch conflicts
automatically for us on patches where the grammar is available and
the patch is of high confidence. Consider this a feature request.

Test compiled on x86_64 against:

	* allnoconfig
	* allmodconfig
	* allyesconfig

@ const_found @
identifier ops;
@@

const struct kernel_param_ops ops = {
};

@ const_not_found depends on !const_found @
identifier ops;
@@

-struct kernel_param_ops ops = {
+const struct kernel_param_ops ops = {
};

Generated-by: Coccinelle SmPL
Cc: Rusty Russell 
Cc: Junio C Hamano 
Cc: Andrew Morton 
Cc: Kees Cook 
Cc: Tejun Heo 
Cc: Ingo Molnar 
Cc: cocci@systeme.lip6.fr
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez 
Signed-off-by: Rusty Russell

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2014-12-15T04:36:37+00:00

Pull security layer updates from James Morris:
 "In terms of changes, there's general maintenance to the Smack,
  SELinux, and integrity code.

  The IMA code adds a new kconfig option, IMA_APPRAISE_SIGNED_INIT,
  which allows IMA appraisal to require signatures.  Support for reading
  keys from rootfs before init is call is also added"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (23 commits)
  selinux: Remove security_ops extern
  security: smack: fix out-of-bounds access in smk_parse_smack()
  VFS: refactor vfs_read()
  ima: require signature based appraisal
  integrity: provide a hook to load keys when rootfs is ready
  ima: load x509 certificate from the kernel
  integrity: provide a function to load x509 certificate from the kernel
  integrity: define a new function integrity_read_file()
  Security: smack: replace kzalloc with kmem_cache for inode_smack
  Smack: Lock mode for the floor and hat labels
  ima: added support for new kernel cmdline parameter ima_template_fmt
  ima: allocate field pointers array on demand in template_desc_init_fields()
  ima: don't allocate a copy of template_fmt in template_desc_init_fields()
  ima: display template format in meas. list if template name length is zero
  ima: added error messages to template-related functions
  ima: use atomic bit operations to protect policy update interface
  ima: ignore empty and with whitespaces policy lines
  ima: no need to allocate entry for comment
  ima: report policy load status
  ima: use path names cache
  ...

integrity: define a new function integrity_read_file()

2014-11-18T04:09:18+00:00

This patch defines a new function called integrity_read_file()
to read file from the kernel into a buffer. Subsequent patches
will read a file containing the public keys and load them onto
the IMA keyring.

This patch moves and renames ima_kernel_read(), the non-security
checking version of kernel_read(), to integrity_kernel_read().

Changes in v3:
* Patch descriptions improved (Mimi)
* Add missing cast (kbuild test robot)

Changes in v2:
* configuration option removed
* function declared as '__init'

Signed-off-by: Dmitry Kasatkin 
Signed-off-by: Mimi Zohar

security, crypto: LLVMLinux: Remove VLAIS from ima_crypto.c

2014-10-14T08:51:24+00:00

Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99
compliant equivalent. This patch allocates the appropriate amount of memory
using a char array using the SHASH_DESC_ON_STACK macro.

The new code can be compiled with both gcc and clang.

Signed-off-by: Behan Webster 
Reviewed-by: Mark Charlebois 
Reviewed-by: Jan-Simon Möller 
Acked-by: Herbert Xu 
Acked-by: Dmitry Kasatkin 
Cc: tglx@linutronix.de

ima: add missing '__init' keywords

2014-09-09T14:28:50+00:00

Add missing keywords to the function definition to cleanup
to discard initialization code.

Signed-off-by: Dmitry Kasatkin 
Reviewed-by: Roberto Sassu 
Signed-off-by: Mimi Zohar