user/sven/linux.git/security/Kconfig, branch v2.6.16.44

[LSM-IPSec]: Security association restriction.

2006-01-03T21:10:24Z

This patch series implements per packet access control via the extension of the Linux Security Modules (LSM) interface by hooks in the XFRM and pfkey subsystems that leverage IPSec security associations to label packets. Extensions to the SELinux LSM are included that leverage the patch for this purpose. This patch implements the changes necessary to the XFRM subsystem, pfkey interface, ipv4/ipv6, and xfrm_user interface to restrict a socket to use only authorized security associations (or no security association) to send/receive network packets. Patch purpose: The patch is designed to enable access control per packets based on the strongly authenticated IPSec security association. Such access controls augment the existing ones based on network interface and IP address. The former are very coarse-grained, and the latter can be spoofed. By using IPSec, the system can control access to remote hosts based on cryptographic keys generated using the IPSec mechanism. This enables access control on a per-machine basis or per-application if the remote machine is running the same mechanism and trusted to enforce the access control policy. Patch design approach: The overall approach is that policy (xfrm_policy) entries set by user-level programs (e.g., setkey for ipsec-tools) are extended with a security context that is used at policy selection time in the XFRM subsystem to restrict the sockets that can send/receive packets via security associations (xfrm_states) that are built from those policies. A presentation available at www.selinux-symposium.org/2005/presentations/session2/2-3-jaeger.pdf from the SELinux symposium describes the overall approach. Patch implementation details: On output, the policy retrieved (via xfrm_policy_lookup or xfrm_sk_policy_lookup) must be authorized for the security context of the socket and the same security context is required for resultant security association (retrieved or negotiated via racoon in ipsec-tools). This is enforced in xfrm_state_find. On input, the policy retrieved must also be authorized for the socket (at __xfrm_policy_check), and the security context of the policy must also match the security association being used. The patch has virtually no impact on packets that do not use IPSec. The existing Netfilter (outgoing) and LSM rcv_skb hooks are used as before. Also, if IPSec is used without security contexts, the impact is minimal. The LSM must allow such policies to be selected for the combination of socket and remote machine, but subsequent IPSec processing proceeds as in the original case. Testing: The pfkey interface is tested using the ipsec-tools. ipsec-tools have been modified (a separate ipsec-tools patch is available for version 0.5) that supports assignment of xfrm_policy entries and security associations with security contexts via setkey and the negotiation using the security contexts via racoon. The xfrm_user interface is tested via ad hoc programs that set security contexts. These programs are also available from me, and contain programs for setting, getting, and deleting policy for testing this interface. Testing of sa functions was done by tracing kernel behavior. Signed-off-by: Trent Jaeger Signed-off-by: Herbert Xu Signed-off-by: David S. Miller

[PATCH] SECURITY must depend on SYSFS

2005-08-22T21:10:22Z

CONFIG_SECURITY=y and CONFIG_SYSFS=n results in the following compile error: <-- snip --> ... LD vmlinux security/built-in.o: In function `securityfs_init': inode.c:(.init.text+0x1c2): undefined reference to `kernel_subsys' make: *** [vmlinux] Error 1 <-- snip --> Signed-off-by: Adrian Bunk Signed-off-by: Chris Wright

[PATCH] various Kconfig fixes

2005-01-15T07:46:55Z

Here are some Kconfig fixes: - typo fixes - unused token removes (empty or duplicated 'help') - non ASCII characters replaces - e-mail address and URL format corrections Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] seclvl: add missing dependency

2005-01-11T11:17:41Z

*** Warning: "crypto_free_tfm" [security/seclvl.ko] undefined! *** Warning: "crypto_alloc_tfm" [security/seclvl.ko] undefined! *** Warning: "crypto_unregister_alg" [crypto/sha1.ko] undefined! *** Warning: "crypto_register_alg" [crypto/sha1.ko] undefined! Signed-off-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] BSD Secure Levels LSM: core

2004-10-20T01:30:25Z

This patch modifies Kconfig and Makefile to support building the BSD Secure Levels LSM, in addition to the module itself. Signed-off-by: Michael A. Halcrow Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] implement in-kernel keys & keyring management

2004-10-19T00:58:51Z

The feature set the patch includes: - Key attributes: - Key type - Description (by which a key of a particular type can be selected) - Payload - UID, GID and permissions mask - Expiry time - Keyrings (just a type of key that holds links to other keys) - User-defined keys - Key revokation - Access controls - Per user key-count and key-memory consumption quota - Three std keyrings per task: per-thread, per-process, session - Two std keyrings per user: per-user and default-user-session - prctl() functions for key and keyring creation and management - Kernel interfaces for filesystem, blockdev, net stack access - JIT key creation by usermode helper There are also two utility programs available: (*) http://people.redhat.com/~dhowells/keys/keyctl.c A comprehensive key management tool, permitting all the interfaces available to userspace to be exercised. (*) http://people.redhat.com/~dhowells/keys/request-key An example shell script (to be installed in /sbin) for instantiating a key. Signed-Off-By: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] small simplification for two SECURITY dependencies

2004-08-24T04:32:33Z

I'd suggest the patch below to let the SECURITY_CAPABILITIES and SECURITY_ROOTPLUG dependencies look a bit more simple. Signed-off-by: Adrian Bunk Signed-off-by: Chris Wright Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] selinux merge

2003-08-01T02:54:11Z

From Stephen Smalley This has been in -mm for a few weeks and James Morris has been regression testing each release.

[PATCH] SECURITY_ROOTPLUG must depend on USB

2003-06-02T02:39:52Z

The following patch lets SECURITY_ROOTPLUG depend on USB (otherwise there are link errors since Root Plug Support needs usb_bus_list{,_lock}):

[LSM]: networking hooks, kconfig bits.

2003-02-06T17:47:09Z