forked from Minki/linux
c1a856c964
Since the upstreaming of the mlsxfrm modification a few months back,
testing has resulted in the identification of the following issues/bugs that
are resolved in this patch set.
1. Fix the security context used in the IKE negotiation to be the context
of the socket as opposed to the context of the SPD rule.
2. Fix SO_PEERSEC for tcp sockets to return the security context of
the peer as opposed to the source.
3. Fix the selection of an SA for an outgoing packet to be at the same
context as the originating socket/flow.
The following would be the result of applying this patchset:
- SO_PEERSEC will now correctly return the peer's context.
- IKE deamons will receive the context of the source socket/flow
as opposed to the SPD rule's context so that the negotiated SA
will be at the same context as the source socket/flow.
- 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 };
This Patch: Pass correct security context to IKE for use in negotiation
Fix the security context passed to IKE for use in negotiation to be the
context of the socket as opposed to the context of the SPD rule so that
the SA carries the label of the originating socket/flow.
Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: James Morris <jmorris@namei.org>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*
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* SELinux support for the XFRM LSM hooks
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*
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* Author : Trent Jaeger, <jaegert@us.ibm.com>
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* Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com>
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*/
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#ifndef _SELINUX_XFRM_H_
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#define _SELINUX_XFRM_H_
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int selinux_xfrm_policy_alloc(struct xfrm_policy *xp,
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struct xfrm_user_sec_ctx *sec_ctx);
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int selinux_xfrm_policy_clone(struct xfrm_policy *old, struct xfrm_policy *new);
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void selinux_xfrm_policy_free(struct xfrm_policy *xp);
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int selinux_xfrm_policy_delete(struct xfrm_policy *xp);
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int selinux_xfrm_state_alloc(struct xfrm_state *x,
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struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
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void selinux_xfrm_state_free(struct xfrm_state *x);
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int selinux_xfrm_state_delete(struct xfrm_state *x);
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int selinux_xfrm_policy_lookup(struct xfrm_policy *xp, u32 fl_secid, u8 dir);
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int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
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struct xfrm_policy *xp, struct flowi *fl);
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int selinux_xfrm_flow_state_match(struct flowi *fl, struct xfrm_state *xfrm,
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struct xfrm_policy *xp);
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/*
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* Extract the security blob from the sock (it's actually on the socket)
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*/
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static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
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{
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if (!sk->sk_socket)
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return NULL;
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return SOCK_INODE(sk->sk_socket)->i_security;
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}
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#ifdef CONFIG_SECURITY_NETWORK_XFRM
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int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
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struct avc_audit_data *ad);
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int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
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struct avc_audit_data *ad);
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u32 selinux_socket_getpeer_stream(struct sock *sk);
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u32 selinux_socket_getpeer_dgram(struct sk_buff *skb);
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int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
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#else
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static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
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struct avc_audit_data *ad)
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{
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return 0;
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}
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static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
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struct avc_audit_data *ad)
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{
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return 0;
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}
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static inline int selinux_socket_getpeer_stream(struct sock *sk)
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{
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return SECSID_NULL;
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}
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static inline int selinux_socket_getpeer_dgram(struct sk_buff *skb)
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{
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return SECSID_NULL;
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}
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static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
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{
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*sid = SECSID_NULL;
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return 0;
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}
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#endif
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#endif /* _SELINUX_XFRM_H_ */
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