[GitHub/mt8127/android_kernel_alcatel_ttab.git] / security / selinux / ss / policydb.h

/*
 * A policy database (policydb) specifies the
 * configuration data for the security policy.
 *
 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
 */

/*
 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
 *
 *	Support for enhanced MLS infrastructure.
 *
 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
 *
 * 	Added conditional policy language extensions
 *
 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
 *	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, version 2.
 */

#ifndef _SS_POLICYDB_H_
#define _SS_POLICYDB_H_

#include "symtab.h"
#include "avtab.h"
#include "sidtab.h"
#include "context.h"
#include "constraint.h"

/*
 * A datum type is defined for each kind of symbol
 * in the configuration data:  individual permissions,
 * common prefixes for access vectors, classes,
 * users, roles, types, sensitivities, categories, etc.
 */

/* Permission attributes */
struct perm_datum {
	u32 value;		/* permission bit + 1 */
};

/* Attributes of a common prefix for access vectors */
struct common_datum {
	u32 value;			/* internal common value */
	struct symtab permissions;	/* common permissions */
};

/* Class attributes */
struct class_datum {
	u32 value;			/* class value */
	char *comkey;			/* common name */
	struct common_datum *comdatum;	/* common datum */
	struct symtab permissions;	/* class-specific permission symbol table */
	struct constraint_node *constraints;	/* constraints on class permissions */
	struct constraint_node *validatetrans;	/* special transition rules */
};

/* Role attributes */
struct role_datum {
	u32 value;			/* internal role value */
	struct ebitmap dominates;	/* set of roles dominated by this role */
	struct ebitmap types;		/* set of authorized types for role */
};

struct role_trans {
	u32 role;		/* current role */
	u32 type;		/* program executable type */
	u32 new_role;		/* new role */
	struct role_trans *next;
};

struct role_allow {
	u32 role;		/* current role */
	u32 new_role;		/* new role */
	struct role_allow *next;
};

/* Type attributes */
struct type_datum {
	u32 value;		/* internal type value */
	unsigned char primary;	/* primary name? */
};

/* User attributes */
struct user_datum {
	u32 value;			/* internal user value */
	struct ebitmap roles;		/* set of authorized roles for user */
	struct mls_range range;		/* MLS range (min - max) for user */
	struct mls_level dfltlevel;	/* default login MLS level for user */
};


/* Sensitivity attributes */
struct level_datum {
	struct mls_level *level;	/* sensitivity and associated categories */
	unsigned char isalias;	/* is this sensitivity an alias for another? */
};

/* Category attributes */
struct cat_datum {
	u32 value;		/* internal category bit + 1 */
	unsigned char isalias;  /* is this category an alias for another? */
};

struct range_trans {
	u32 source_type;
	u32 target_type;
	u32 target_class;
	struct mls_range target_range;
	struct range_trans *next;
};

/* Boolean data type */
struct cond_bool_datum {
	__u32 value;		/* internal type value */
	int state;
};

struct cond_node;

/*
 * The configuration data includes security contexts for
 * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
 * network interfaces, and nodes.  This structure stores the
 * relevant data for one such entry.  Entries of the same kind
 * (e.g. all initial SIDs) are linked together into a list.
 */
struct ocontext {
	union {
		char *name;	/* name of initial SID, fs, netif, fstype, path */
		struct {
			u8 protocol;
			u16 low_port;
			u16 high_port;
		} port;		/* TCP or UDP port information */
		struct {
			u32 addr;
			u32 mask;
		} node;		/* node information */
		struct {
			u32 addr[4];
			u32 mask[4];
		} node6;        /* IPv6 node information */
	} u;
	union {
		u32 sclass;  /* security class for genfs */
		u32 behavior;  /* labeling behavior for fs_use */
	} v;
	struct context context[2];	/* security context(s) */
	u32 sid[2];	/* SID(s) */
	struct ocontext *next;
};

struct genfs {
	char *fstype;
	struct ocontext *head;
	struct genfs *next;
};

/* symbol table array indices */
#define SYM_COMMONS 0
#define SYM_CLASSES 1
#define SYM_ROLES   2
#define SYM_TYPES   3
#define SYM_USERS   4
#define SYM_BOOLS   5
#define SYM_LEVELS  6
#define SYM_CATS    7
#define SYM_NUM     8

/* object context array indices */
#define OCON_ISID  0	/* initial SIDs */
#define OCON_FS    1	/* unlabeled file systems */
#define OCON_PORT  2	/* TCP and UDP port numbers */
#define OCON_NETIF 3	/* network interfaces */
#define OCON_NODE  4	/* nodes */
#define OCON_FSUSE 5	/* fs_use */
#define OCON_NODE6 6	/* IPv6 nodes */
#define OCON_NUM   7

/* The policy database */
struct policydb {
	/* symbol tables */
	struct symtab symtab[SYM_NUM];
#define p_commons symtab[SYM_COMMONS]
#define p_classes symtab[SYM_CLASSES]
#define p_roles symtab[SYM_ROLES]
#define p_types symtab[SYM_TYPES]
#define p_users symtab[SYM_USERS]
#define p_bools symtab[SYM_BOOLS]
#define p_levels symtab[SYM_LEVELS]
#define p_cats symtab[SYM_CATS]

	/* symbol names indexed by (value - 1) */
	char **sym_val_to_name[SYM_NUM];
#define p_common_val_to_name sym_val_to_name[SYM_COMMONS]
#define p_class_val_to_name sym_val_to_name[SYM_CLASSES]
#define p_role_val_to_name sym_val_to_name[SYM_ROLES]
#define p_type_val_to_name sym_val_to_name[SYM_TYPES]
#define p_user_val_to_name sym_val_to_name[SYM_USERS]
#define p_bool_val_to_name sym_val_to_name[SYM_BOOLS]
#define p_sens_val_to_name sym_val_to_name[SYM_LEVELS]
#define p_cat_val_to_name sym_val_to_name[SYM_CATS]

	/* class, role, and user attributes indexed by (value - 1) */
	struct class_datum **class_val_to_struct;
	struct role_datum **role_val_to_struct;
	struct user_datum **user_val_to_struct;

	/* type enforcement access vectors and transitions */
	struct avtab te_avtab;

	/* role transitions */
	struct role_trans *role_tr;

	/* bools indexed by (value - 1) */
	struct cond_bool_datum **bool_val_to_struct;
	/* type enforcement conditional access vectors and transitions */
	struct avtab te_cond_avtab;
	/* linked list indexing te_cond_avtab by conditional */
	struct cond_node* cond_list;

	/* role allows */
	struct role_allow *role_allow;

	/* security contexts of initial SIDs, unlabeled file systems,
	   TCP or UDP port numbers, network interfaces and nodes */
	struct ocontext *ocontexts[OCON_NUM];

        /* security contexts for files in filesystems that cannot support
	   a persistent label mapping or use another
	   fixed labeling behavior. */
  	struct genfs *genfs;

	/* range transitions */
	struct range_trans *range_tr;

	/* type -> attribute reverse mapping */
	struct ebitmap *type_attr_map;

	struct ebitmap policycaps;

	struct ebitmap permissive_map;

	unsigned int policyvers;

	unsigned int reject_unknown : 1;
	unsigned int allow_unknown : 1;
	u32 *undefined_perms;
};

extern void policydb_destroy(struct policydb *p);
extern int policydb_load_isids(struct policydb *p, struct sidtab *s);
extern int policydb_context_isvalid(struct policydb *p, struct context *c);
extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
extern int policydb_read(struct policydb *p, void *fp);

#define PERM_SYMTAB_SIZE 32

#define POLICYDB_CONFIG_MLS    1

/* the config flags related to unknown classes/perms are bits 2 and 3 */
#define REJECT_UNKNOWN	0x00000002
#define ALLOW_UNKNOWN	0x00000004

#define OBJECT_R "object_r"
#define OBJECT_R_VAL 1

#define POLICYDB_MAGIC SELINUX_MAGIC
#define POLICYDB_STRING "SE Linux"

struct policy_file {
	char *data;
	size_t len;
};

static inline int next_entry(void *buf, struct policy_file *fp, size_t bytes)
{
	if (bytes > fp->len)
		return -EINVAL;

	memcpy(buf, fp->data, bytes);
	fp->data += bytes;
	fp->len -= bytes;
	return 0;
}

#endif	/* _SS_POLICYDB_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* A policy database (policydb) specifies the
	3	* configuration data for the security policy.
	4	*
	5	* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
	6	*/
	7
	8	/*
	9	* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
	10	*
	11	* Support for enhanced MLS infrastructure.
	12	*
	13	* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
	14	*
	15	* Added conditional policy language extensions
	16	*
	17	* Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
	18	* Copyright (C) 2003 - 2004 Tresys Technology, LLC
	19	* This program is free software; you can redistribute it and/or modify
	20	* it under the terms of the GNU General Public License as published by
	21	* the Free Software Foundation, version 2.
	22	*/
	23
	24	#ifndef _SS_POLICYDB_H_
	25	#define _SS_POLICYDB_H_
	26
	27	#include "symtab.h"
	28	#include "avtab.h"
	29	#include "sidtab.h"
	30	#include "context.h"
	31	#include "constraint.h"
	32
	33	/*
	34	* A datum type is defined for each kind of symbol
	35	* in the configuration data: individual permissions,
	36	* common prefixes for access vectors, classes,
	37	* users, roles, types, sensitivities, categories, etc.
	38	*/
	39
	40	/* Permission attributes */
	41	struct perm_datum {
	42	u32 value; /* permission bit + 1 */
	43	};
	44
	45	/* Attributes of a common prefix for access vectors */
	46	struct common_datum {
	47	u32 value; /* internal common value */
	48	struct symtab permissions; /* common permissions */
	49	};
	50
	51	/* Class attributes */
	52	struct class_datum {
	53	u32 value; /* class value */
	54	char comkey; / common name */
	55	struct common_datum comdatum; / common datum */
	56	struct symtab permissions; /* class-specific permission symbol table */
	57	struct constraint_node constraints; / constraints on class permissions */
	58	struct constraint_node validatetrans; / special transition rules */
	59	};
	60
	61	/* Role attributes */
	62	struct role_datum {
	63	u32 value; /* internal role value */
	64	struct ebitmap dominates; /* set of roles dominated by this role */
65	struct ebitmap types; /* set of authorized types for role */
66	};
67
68	struct role_trans {
69	u32 role; /* current role */
70	u32 type; /* program executable type */
71	u32 new_role; /* new role */
72	struct role_trans *next;
73	};
74
75	struct role_allow {
76	u32 role; /* current role */
77	u32 new_role; /* new role */
78	struct role_allow *next;
79	};
80
81	/* Type attributes */
82	struct type_datum {
83	u32 value; /* internal type value */
84	unsigned char primary; /* primary name? */
85	};
86
87	/* User attributes */
88	struct user_datum {
89	u32 value; /* internal user value */
90	struct ebitmap roles; /* set of authorized roles for user */
91	struct mls_range range; /* MLS range (min - max) for user */
92	struct mls_level dfltlevel; /* default login MLS level for user */
93	};
94
95
96	/* Sensitivity attributes */
97	struct level_datum {
98	struct mls_level level; / sensitivity and associated categories */
99	unsigned char isalias; /* is this sensitivity an alias for another? */
100	};
101
102	/* Category attributes */
103	struct cat_datum {
104	u32 value; /* internal category bit + 1 */
105	unsigned char isalias; /* is this category an alias for another? */
106	};
107
108	struct range_trans {
f3f87714 DG	109	u32 source_type;
	110	u32 target_type;
	111	u32 target_class;
	112	struct mls_range target_range;
1da177e4 LT	113	struct range_trans *next;
	114	};
	115
	116	/* Boolean data type */
	117	struct cond_bool_datum {
	118	__u32 value; /* internal type value */
	119	int state;
	120	};
	121
	122	struct cond_node;
	123
	124	/*
	125	* The configuration data includes security contexts for
	126	* initial SIDs, unlabeled file systems, TCP and UDP port numbers,
	127	* network interfaces, and nodes. This structure stores the
	128	* relevant data for one such entry. Entries of the same kind
	129	* (e.g. all initial SIDs) are linked together into a list.
	130	*/
	131	struct ocontext {
	132	union {
	133	char name; / name of initial SID, fs, netif, fstype, path */
	134	struct {
	135	u8 protocol;
	136	u16 low_port;
	137	u16 high_port;
	138	} port; /* TCP or UDP port information */
	139	struct {
	140	u32 addr;
	141	u32 mask;
	142	} node; /* node information */
	143	struct {
	144	u32 addr[4];
	145	u32 mask[4];
	146	} node6; /* IPv6 node information */
	147	} u;
	148	union {
	149	u32 sclass; /* security class for genfs */
	150	u32 behavior; /* labeling behavior for fs_use */
	151	} v;
	152	struct context context[2]; /* security context(s) */
	153	u32 sid[2]; /* SID(s) */
	154	struct ocontext *next;
	155	};
	156
	157	struct genfs {
	158	char *fstype;
	159	struct ocontext *head;
	160	struct genfs *next;
	161	};
	162
	163	/* symbol table array indices */
	164	#define SYM_COMMONS 0
	165	#define SYM_CLASSES 1
	166	#define SYM_ROLES 2
	167	#define SYM_TYPES 3
	168	#define SYM_USERS 4
	169	#define SYM_BOOLS 5
	170	#define SYM_LEVELS 6
	171	#define SYM_CATS 7
	172	#define SYM_NUM 8
	173
	174	/* object context array indices */
	175	#define OCON_ISID 0 /* initial SIDs */
	176	#define OCON_FS 1 /* unlabeled file systems */
177	#define OCON_PORT 2 /* TCP and UDP port numbers */
178	#define OCON_NETIF 3 /* network interfaces */
179	#define OCON_NODE 4 /* nodes */
180	#define OCON_FSUSE 5 /* fs_use */
181	#define OCON_NODE6 6 /* IPv6 nodes */
182	#define OCON_NUM 7
183
184	/* The policy database */
185	struct policydb {
186	/* symbol tables */
187	struct symtab symtab[SYM_NUM];
188	#define p_commons symtab[SYM_COMMONS]
189	#define p_classes symtab[SYM_CLASSES]
190	#define p_roles symtab[SYM_ROLES]
191	#define p_types symtab[SYM_TYPES]
192	#define p_users symtab[SYM_USERS]
193	#define p_bools symtab[SYM_BOOLS]
194	#define p_levels symtab[SYM_LEVELS]
195	#define p_cats symtab[SYM_CATS]
196
197	/* symbol names indexed by (value - 1) */
198	char **sym_val_to_name[SYM_NUM];
199	#define p_common_val_to_name sym_val_to_name[SYM_COMMONS]
200	#define p_class_val_to_name sym_val_to_name[SYM_CLASSES]
201	#define p_role_val_to_name sym_val_to_name[SYM_ROLES]
202	#define p_type_val_to_name sym_val_to_name[SYM_TYPES]
203	#define p_user_val_to_name sym_val_to_name[SYM_USERS]
204	#define p_bool_val_to_name sym_val_to_name[SYM_BOOLS]
205	#define p_sens_val_to_name sym_val_to_name[SYM_LEVELS]
206	#define p_cat_val_to_name sym_val_to_name[SYM_CATS]
207
208	/* class, role, and user attributes indexed by (value - 1) */
209	struct class_datum **class_val_to_struct;
210	struct role_datum **role_val_to_struct;
211	struct user_datum **user_val_to_struct;
212
213	/* type enforcement access vectors and transitions */
214	struct avtab te_avtab;
215
216	/* role transitions */
217	struct role_trans *role_tr;
218
219	/* bools indexed by (value - 1) */
220	struct cond_bool_datum **bool_val_to_struct;
221	/* type enforcement conditional access vectors and transitions */
222	struct avtab te_cond_avtab;
223	/* linked list indexing te_cond_avtab by conditional */
224	struct cond_node* cond_list;
225
226	/* role allows */
227	struct role_allow *role_allow;
228
229	/* security contexts of initial SIDs, unlabeled file systems,
230	TCP or UDP port numbers, network interfaces and nodes */
231	struct ocontext *ocontexts[OCON_NUM];
232
233	/* security contexts for files in filesystems that cannot support
234	a persistent label mapping or use another
235	fixed labeling behavior. */
236	struct genfs *genfs;
237
238	/* range transitions */
239	struct range_trans *range_tr;
240
782ebb99 SS	241	/* type -> attribute reverse mapping */
	242	struct ebitmap *type_attr_map;
	243
3bb56b25 PM	244	struct ebitmap policycaps;
3bb56b25 PM	245
64dbf074 EP	246	struct ebitmap permissive_map;
64dbf074 EP	247
1da177e4	248	unsigned int policyvers;
3f12070e EP	249
	250	unsigned int reject_unknown : 1;
	251	unsigned int allow_unknown : 1;
	252	u32 *undefined_perms;
1da177e4 LT	253	};
	254
	255	extern void policydb_destroy(struct policydb *p);
	256	extern int policydb_load_isids(struct policydb p, struct sidtab s);
	257	extern int policydb_context_isvalid(struct policydb p, struct context c);
45e5421e SS	258	extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
	259	extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
	260	extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
1da177e4 LT	261	extern int policydb_read(struct policydb p, void fp);
	262
	263	#define PERM_SYMTAB_SIZE 32
	264
	265	#define POLICYDB_CONFIG_MLS 1
	266
3f12070e EP	267	/* the config flags related to unknown classes/perms are bits 2 and 3 */
	268	#define REJECT_UNKNOWN 0x00000002
	269	#define ALLOW_UNKNOWN 0x00000004
	270
1da177e4 LT	271	#define OBJECT_R "object_r"
	272	#define OBJECT_R_VAL 1
	273
	274	#define POLICYDB_MAGIC SELINUX_MAGIC
	275	#define POLICYDB_STRING "SE Linux"
	276
	277	struct policy_file {
	278	char *data;
	279	size_t len;
	280	};
	281
	282	static inline int next_entry(void buf, struct policy_file fp, size_t bytes)
	283	{
	284	if (bytes > fp->len)
	285	return -EINVAL;
	286
	287	memcpy(buf, fp->data, bytes);
	288	fp->data += bytes;
	289	fp->len -= bytes;
	290	return 0;
	291	}
	292
	293	#endif /* _SS_POLICYDB_H_ */
	294