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SELinux: Fix SA selection semantics

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Fix the selection of an SA for an outgoing packet to be at the same
context as the originating socket/flow. This eliminates the SELinux
policy's ability to use/sendto SAs with contexts other than the socket's.

With this patch applied, the SELinux policy will require one or more of the
following for a socket to be able to communicate with/without SAs:

1. To enable a socket to communicate without using labeled-IPSec SAs:

allow socket_t unlabeled_t:association { sendto recvfrom }

2. To enable a socket to communicate with labeled-IPSec SAs:

allow socket_t self:association { sendto };
allow socket_t peer_sa_t:association { recvfrom };

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Venkat Yekkirala
2006-11-08 17:04:26 -06:00
committed by David S. Miller
parent 6b877699c6
commit 67f83cbf08
6 changed files with 70 additions and 93 deletions
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7
security/selinux/include/xfrm.h
View File

@@ -19,9 +19,6 @@ int selinux_xfrm_state_delete(struct xfrm_state *x);
int selinux_xfrm_policy_lookup(struct xfrm_policy *xp, u32 fl_secid, u8 dir);
int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
struct xfrm_policy *xp, struct flowi *fl);
int selinux_xfrm_flow_state_match(struct flowi *fl, struct xfrm_state *xfrm,
struct xfrm_policy *xp);
/*
* Extract the security blob from the sock (it's actually on the socket)
@@ -38,7 +35,7 @@ static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
struct avc_audit_data *ad);
int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
struct avc_audit_data *ad);
struct avc_audit_data *ad, u8 proto);
u32 selinux_socket_getpeer_dgram(struct sk_buff *skb);
int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
#else
@@ -49,7 +46,7 @@ static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
}
static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
struct avc_audit_data *ad)
struct avc_audit_data *ad, u8 proto)
{
return 0;
}