kernel26-2.6.12-alx-r9/security/capability.c

/*
 *  Capabilities Linux Security Module
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/security.h>
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
#include <linux/smp_lock.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/ptrace.h>
#include <linux/moduleparam.h>

static struct security_operations capability_ops = {
	.ptrace =			cap_ptrace,
	.capget =			cap_capget,
	.capset_check =			cap_capset_check,
	.capset_set =			cap_capset_set,
	.capable =			cap_capable,
	.settime =			cap_settime,
	.netlink_send =			cap_netlink_send,
	.netlink_recv =			cap_netlink_recv,

	.bprm_apply_creds =		cap_bprm_apply_creds,
	.bprm_set_security =		cap_bprm_set_security,
	.bprm_secureexec =		cap_bprm_secureexec,

	.inode_setxattr =		cap_inode_setxattr,
	.inode_removexattr =		cap_inode_removexattr,

	.task_post_setuid =		cap_task_post_setuid,
	.task_reparent_to_init =	cap_task_reparent_to_init,

	.syslog =                       cap_syslog,

	.vm_enough_memory =             cap_vm_enough_memory,
};

#define MY_NAME __stringify(KBUILD_MODNAME)

/* flag to keep track of how we were registered */
static int secondary;

static int capability_disable;
module_param_named(disable, capability_disable, int, 0);
MODULE_PARM_DESC(disable, "To disable capabilities module set disable = 1");

static int __init capability_init (void)
{
	if (capability_disable) {
		printk(KERN_INFO "Capabilities disabled at initialization\n");
		return 0;
	}
	/* register ourselves with the security framework */
	if (register_security (&capability_ops)) {
		/* try registering with primary module */
		if (mod_reg_security (MY_NAME, &capability_ops)) {
			printk (KERN_INFO "Failure registering capabilities "
				"with primary security module.\n");
			return -EINVAL;
		}
		secondary = 1;
	}
	printk (KERN_INFO "Capability LSM initialized%s\n",
		secondary ? " as secondary" : "");
	return 0;
}

static void __exit capability_exit (void)
{
	if (capability_disable)
		return;
	/* remove ourselves from the security framework */
	if (secondary) {
		if (mod_unreg_security (MY_NAME, &capability_ops))
			printk (KERN_INFO "Failure unregistering capabilities "
				"with primary module.\n");
		return;
	}

	if (unregister_security (&capability_ops)) {
		printk (KERN_INFO
			"Failure unregistering capabilities with the kernel\n");
	}
}

security_initcall (capability_init);
module_exit (capability_exit);

MODULE_DESCRIPTION("Standard Linux Capabilities Security Module");
MODULE_LICENSE("GPL");
1	/*
2	* Capabilities Linux Security Module
3	*
4	* This program is free software; you can redistribute it and/or modify
5	* it under the terms of the GNU General Public License as published by
6	* the Free Software Foundation; either version 2 of the License, or
7	* (at your option) any later version.
8	*
9	*/
10
11	#include <linux/config.h>
12	#include <linux/module.h>
13	#include <linux/init.h>
14	#include <linux/kernel.h>
15	#include <linux/security.h>
16	#include <linux/file.h>
17	#include <linux/mm.h>
18	#include <linux/mman.h>
19	#include <linux/pagemap.h>
20	#include <linux/swap.h>
21	#include <linux/smp_lock.h>
22	#include <linux/skbuff.h>
23	#include <linux/netlink.h>
24	#include <linux/ptrace.h>
25	#include <linux/moduleparam.h>
26
27	static struct security_operations capability_ops = {
28	.ptrace = cap_ptrace,
29	.capget = cap_capget,
30	.capset_check = cap_capset_check,
31	.capset_set = cap_capset_set,
32	.capable = cap_capable,
33	.settime = cap_settime,
34	.netlink_send = cap_netlink_send,
35	.netlink_recv = cap_netlink_recv,
36
37	.bprm_apply_creds = cap_bprm_apply_creds,
38	.bprm_set_security = cap_bprm_set_security,
39	.bprm_secureexec = cap_bprm_secureexec,
40
41	.inode_setxattr = cap_inode_setxattr,
42	.inode_removexattr = cap_inode_removexattr,
43
44	.task_post_setuid = cap_task_post_setuid,
45	.task_reparent_to_init = cap_task_reparent_to_init,
46
47	.syslog = cap_syslog,
48
49	.vm_enough_memory = cap_vm_enough_memory,
50	};
51
52	#define MY_NAME __stringify(KBUILD_MODNAME)
53
54	/* flag to keep track of how we were registered */
55	static int secondary;
56
57	static int capability_disable;
58	module_param_named(disable, capability_disable, int, 0);
59	MODULE_PARM_DESC(disable, "To disable capabilities module set disable = 1");
60
61	static int __init capability_init (void)
62	{
63	if (capability_disable) {
64	printk(KERN_INFO "Capabilities disabled at initialization\n");
65	return 0;
66	}
67	/* register ourselves with the security framework */
68	if (register_security (&capability_ops)) {
69	/* try registering with primary module */
70	if (mod_reg_security (MY_NAME, &capability_ops)) {
71	printk (KERN_INFO "Failure registering capabilities "
72	"with primary security module.\n");
73	return -EINVAL;
74	}
75	secondary = 1;
76	}
77	printk (KERN_INFO "Capability LSM initialized%s\n",
78	secondary ? " as secondary" : "");
79	return 0;
80	}
81
82	static void __exit capability_exit (void)
83	{
84	if (capability_disable)
85	return;
86	/* remove ourselves from the security framework */
87	if (secondary) {
88	if (mod_unreg_security (MY_NAME, &capability_ops))
89	printk (KERN_INFO "Failure unregistering capabilities "
90	"with primary module.\n");
91	return;
92	}
93
94	if (unregister_security (&capability_ops)) {
95	printk (KERN_INFO
96	"Failure unregistering capabilities with the kernel\n");
97	}
98	}
99
100	security_initcall (capability_init);
101	module_exit (capability_exit);
102
103	MODULE_DESCRIPTION("Standard Linux Capabilities Security Module");
104	MODULE_LICENSE("GPL");