[GitHub/mt8127/android_kernel_alcatel_ttab.git] / security / selinux / nlmsgtab.c

/*
 * Netlink message type permission tables, for user generated messages.
 *
 * Author: James Morris <jmorris@redhat.com>
 *
 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2,
 * as published by the Free Software Foundation.
 */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if.h>
#include <linux/inet_diag.h>
#include <linux/xfrm.h>
#include <linux/audit.h>

#include "flask.h"
#include "av_permissions.h"
#include "security.h"

struct nlmsg_perm {
	u16	nlmsg_type;
	u32	perm;
};

static struct nlmsg_perm nlmsg_route_perms[] =
{
	{ RTM_NEWLINK,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELLINK,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETLINK,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_SETLINK,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWADDR,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELADDR,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETADDR,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWROUTE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELROUTE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETROUTE,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWNEIGH,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELNEIGH,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETNEIGH,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWRULE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELRULE,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETRULE,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWQDISC,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELQDISC,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETQDISC,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWTCLASS,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELTCLASS,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETTCLASS,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWTFILTER,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELTFILTER,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETTFILTER,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWACTION,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELACTION,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETACTION,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWPREFIX,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETMULTICAST,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_GETANYCAST,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_GETNEIGHTBL,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_SETNEIGHTBL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_GETDCB,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_SETDCB,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_NEWNETCONF,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_GETNETCONF,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
	{ RTM_NEWMDB,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	{ RTM_DELMDB,		NETLINK_ROUTE_SOCKET__NLMSG_WRITE  },
	{ RTM_GETMDB,		NETLINK_ROUTE_SOCKET__NLMSG_READ  },
};

static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
{
	{ TCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
	{ DCCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
};

static struct nlmsg_perm nlmsg_xfrm_perms[] =
{
	{ XFRM_MSG_NEWSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_DELSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETSA,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
	{ XFRM_MSG_NEWPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_DELPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
	{ XFRM_MSG_ALLOCSPI,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_ACQUIRE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_EXPIRE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_UPDPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_UPDSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_POLEXPIRE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_FLUSHSA,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_FLUSHPOLICY,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_NEWAE,	NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	{ XFRM_MSG_GETAE,	NETLINK_XFRM_SOCKET__NLMSG_READ  },
};

static struct nlmsg_perm nlmsg_audit_perms[] =
{
	{ AUDIT_GET,		NETLINK_AUDIT_SOCKET__NLMSG_READ     },
	{ AUDIT_SET,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_LIST,		NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
	{ AUDIT_ADD,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_DEL,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_LIST_RULES,	NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
	{ AUDIT_ADD_RULE,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_DEL_RULE,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_USER,		NETLINK_AUDIT_SOCKET__NLMSG_RELAY    },
	{ AUDIT_SIGNAL_INFO,	NETLINK_AUDIT_SOCKET__NLMSG_READ     },
	{ AUDIT_TRIM,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_MAKE_EQUIV,	NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
	{ AUDIT_TTY_GET,	NETLINK_AUDIT_SOCKET__NLMSG_READ     },
	{ AUDIT_TTY_SET,	NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT	},
};


static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
{
	int i, err = -EINVAL;

	for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
		if (nlmsg_type == tab[i].nlmsg_type) {
			*perm = tab[i].perm;
			err = 0;
			break;
		}

	return err;
}

int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
{
	int err = 0;

	switch (sclass) {
	case SECCLASS_NETLINK_ROUTE_SOCKET:
		err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
				 sizeof(nlmsg_route_perms));
		break;

	case SECCLASS_NETLINK_TCPDIAG_SOCKET:
		err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
				 sizeof(nlmsg_tcpdiag_perms));
		break;

	case SECCLASS_NETLINK_XFRM_SOCKET:
		err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
				 sizeof(nlmsg_xfrm_perms));
		break;

	case SECCLASS_NETLINK_AUDIT_SOCKET:
		if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
		     nlmsg_type <= AUDIT_LAST_USER_MSG) ||
		    (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
		     nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
			*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
		} else {
			err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
					 sizeof(nlmsg_audit_perms));
		}
		break;

	/* No messaging from userspace, or class unknown/unhandled */
	default:
		err = -ENOENT;
		break;
	}

	return err;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Netlink message type permission tables, for user generated messages.
	3	*
	4	* Author: James Morris <jmorris@redhat.com>
	5	*
	6	* Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2,
	10	* as published by the Free Software Foundation.
	11	*/
	12	#include <linux/types.h>
	13	#include <linux/kernel.h>
1da177e4 LT	14	#include <linux/netlink.h>
	15	#include <linux/rtnetlink.h>
	16	#include <linux/if.h>
216efaaa	17	#include <linux/inet_diag.h>
1da177e4 LT	18	#include <linux/xfrm.h>
	19	#include <linux/audit.h>
	20
	21	#include "flask.h"
	22	#include "av_permissions.h"
6a3fbe81	23	#include "security.h"
1da177e4	24
bfff3aa4	25	struct nlmsg_perm {
1da177e4 LT	26	u16 nlmsg_type;
	27	u32 perm;
	28	};
	29
	30	static struct nlmsg_perm nlmsg_route_perms[] =
	31	{
	32	{ RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	33	{ RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	34	{ RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	35	{ RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	36	{ RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	37	{ RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	38	{ RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	39	{ RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	40	{ RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	41	{ RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	42	{ RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	43	{ RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	44	{ RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	45	{ RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	46	{ RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	47	{ RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	48	{ RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	49	{ RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	50	{ RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	51	{ RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	52	{ RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	53	{ RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	54	{ RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	55	{ RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	56	{ RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	57	{ RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	58	{ RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	59	{ RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
	60	{ RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
1da177e4 LT	61	{ RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
1da177e4 LT	62	{ RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
c7fb64db TG	63	{ RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
c7fb64db TG	64	{ RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
2f99db28 MS	65	{ RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	66	{ RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
	67	{ RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
350e4f31 EP	68	{ RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
350e4f31 EP	69	{ RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
6e73d71d CW	70	{ RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
6e73d71d CW	71	{ RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
9dd9ff99 AW	72	{ RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
9dd9ff99 AW	73	{ RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
ee07c6e7	74	{ RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
1da177e4 LT	75	};
1da177e4 LT	76
1da177e4 LT	77	static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
	78	{
	79	{ TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
216efaaa	80	{ DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
1da177e4 LT	81	};
	82
	83	static struct nlmsg_perm nlmsg_xfrm_perms[] =
	84	{
	85	{ XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	86	{ XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	87	{ XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
	88	{ XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	89	{ XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	90	{ XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
	91	{ XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
8c29bfe1 JHS	92	{ XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
8c29bfe1 JHS	93	{ XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
1da177e4 LT	94	{ XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
1da177e4 LT	95	{ XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
8c29bfe1 JHS	96	{ XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	97	{ XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	98	{ XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	99	{ XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
	100	{ XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
1da177e4 LT	101	};
	102
	103	static struct nlmsg_perm nlmsg_audit_perms[] =
	104	{
b207a290 JM	105	{ AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
	106	{ AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	107	{ AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
	108	{ AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	109	{ AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
93315ed6 AG	110	{ AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
	111	{ AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
	112	{ AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
b207a290	113	{ AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
c2f0c7c3	114	{ AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
850b0cee EP	115	{ AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
850b0cee EP	116	{ AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
522ed776	117	{ AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
dd34b5d7	118	{ AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
1da177e4 LT	119	};
	120
	121
	122	static int nlmsg_perm(u16 nlmsg_type, u32 perm, struct nlmsg_perm tab, size_t tabsize)
	123	{
	124	int i, err = -EINVAL;
	125
	126	for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
	127	if (nlmsg_type == tab[i].nlmsg_type) {
	128	*perm = tab[i].perm;
	129	err = 0;
	130	break;
	131	}
	132
	133	return err;
	134	}
	135
	136	int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
	137	{
	138	int err = 0;
	139
	140	switch (sclass) {
	141	case SECCLASS_NETLINK_ROUTE_SOCKET:
	142	err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
	143	sizeof(nlmsg_route_perms));
	144	break;
	145
1da177e4 LT	146	case SECCLASS_NETLINK_TCPDIAG_SOCKET:
	147	err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
	148	sizeof(nlmsg_tcpdiag_perms));
	149	break;
	150
	151	case SECCLASS_NETLINK_XFRM_SOCKET:
	152	err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
	153	sizeof(nlmsg_xfrm_perms));
	154	break;
	155
	156	case SECCLASS_NETLINK_AUDIT_SOCKET:
90d526c0 SG	157	if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
	158	nlmsg_type <= AUDIT_LAST_USER_MSG) \|\|
	159	(nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
bfff3aa4	160	nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
209aba03 DW	161	*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
	162	} else {
	163	err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
	164	sizeof(nlmsg_audit_perms));
	165	}
1da177e4 LT	166	break;
	167
	168	/* No messaging from userspace, or class unknown/unhandled */
	169	default:
	170	err = -ENOENT;
	171	break;
	172	}
	173
	174	return err;
	175	}