diff options
author | Paul Moore <paul.moore@hp.com> | 2006-11-17 17:38:54 -0500 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-02 21:24:14 -0800 |
commit | 3de4bab5b9f8848a0c16a4b1ffe0452f0d670237 (patch) | |
tree | f65c12b53bf2ad02645ea31522f67e7318019498 /security/selinux/ss | |
parent | 9f2ad66509b182b399a5b03de487f45bde623524 (diff) | |
download | blackbird-op-linux-3de4bab5b9f8848a0c16a4b1ffe0452f0d670237.tar.gz blackbird-op-linux-3de4bab5b9f8848a0c16a4b1ffe0452f0d670237.zip |
SELinux: peer secid consolidation for external network labeling
Now that labeled IPsec makes use of the peer_sid field in the
sk_security_struct we can remove a lot of the special cases between labeled
IPsec and NetLabel. In addition, create a new function,
security_skb_extlbl_sid(), which we can use in several places to get the
security context of the packet's external label which allows us to further
simplify the code in a few places.
Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux/ss')
-rw-r--r-- | security/selinux/ss/services.c | 90 |
1 files changed, 28 insertions, 62 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index b66b454fe72b..b43dd803fd5e 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -54,6 +54,7 @@ #include "mls.h" #include "objsec.h" #include "selinux_netlabel.h" +#include "xfrm.h" extern void selnl_notify_policyload(u32 seqno); unsigned int policydb_loaded_version; @@ -2191,6 +2192,32 @@ void selinux_audit_set_callback(int (*callback)(void)) aurule_callback = callback; } +/** + * security_skb_extlbl_sid - Determine the external label of a packet + * @skb: the packet + * @base_sid: the SELinux SID to use as a context for MLS only external labels + * @sid: the packet's SID + * + * Description: + * Check the various different forms of external packet labeling and determine + * the external SID for the packet. + * + */ +void security_skb_extlbl_sid(struct sk_buff *skb, u32 base_sid, u32 *sid) +{ + u32 xfrm_sid; + u32 nlbl_sid; + + selinux_skb_xfrm_sid(skb, &xfrm_sid); + if (selinux_netlbl_skbuff_getsid(skb, + (xfrm_sid == SECSID_NULL ? + base_sid : xfrm_sid), + &nlbl_sid) != 0) + nlbl_sid = SECSID_NULL; + + *sid = (nlbl_sid == SECSID_NULL ? xfrm_sid : nlbl_sid); +} + #ifdef CONFIG_NETLABEL /* * This is the structure we store inside the NetLabel cache block. @@ -2408,9 +2435,7 @@ netlbl_secattr_to_sid_return_cleanup: * assign to the packet. Returns zero on success, negative values on failure. * */ -static int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, - u32 base_sid, - u32 *sid) +int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u32 base_sid, u32 *sid) { int rc; struct netlbl_lsm_secattr secattr; @@ -2616,29 +2641,6 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock) } /** - * selinux_netlbl_inet_conn_request - Handle a new connection request - * @skb: the packet - * @sock_sid: the SID of the parent socket - * - * Description: - * If present, use the security attributes of the packet in @skb and the - * parent sock's SID to arrive at a SID for the new child sock. Returns the - * SID of the connection or SECSID_NULL on failure. - * - */ -u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid) -{ - int rc; - u32 peer_sid; - - rc = selinux_netlbl_skbuff_getsid(skb, sock_sid, &peer_sid); - if (rc != 0) - return SECSID_NULL; - - return peer_sid; -} - -/** * selinux_netlbl_inode_permission - Verify the socket is NetLabel labeled * @inode: the file descriptor's inode * @mask: the permission mask @@ -2728,42 +2730,6 @@ int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec, } /** - * selinux_netlbl_socket_getpeersec_stream - Return the connected peer's SID - * @sock: the socket - * - * Description: - * Examine @sock to find the connected peer's SID. Returns the SID on success - * or SECSID_NULL on error. - * - */ -u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock) -{ - struct sk_security_struct *sksec = sock->sk->sk_security; - return sksec->peer_sid; -} - -/** - * selinux_netlbl_socket_getpeersec_dgram - Return the SID of a NetLabel packet - * @skb: the packet - * - * Description: - * Examine @skb to find the SID assigned to it by NetLabel. Returns the SID on - * success, SECSID_NULL on error. - * - */ -u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb) -{ - int peer_sid; - - if (selinux_netlbl_skbuff_getsid(skb, - SECINITSID_UNLABELED, - &peer_sid) != 0) - return SECSID_NULL; - - return peer_sid; -} - -/** * selinux_netlbl_socket_setsockopt - Do not allow users to remove a NetLabel * @sock: the socket * @level: the socket level or protocol |