1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright (C) 2005,2006,2007,2008 IBM Corporation |
4 | * |
5 | * Authors: |
6 | * Reiner Sailer <sailer@watson.ibm.com> |
7 | * Mimi Zohar <zohar@us.ibm.com> |
8 | * |
9 | * File: ima.h |
10 | * internal Integrity Measurement Architecture (IMA) definitions |
11 | */ |
12 | |
13 | #ifndef __LINUX_IMA_H |
14 | #define __LINUX_IMA_H |
15 | |
16 | #include <linux/types.h> |
17 | #include <linux/crypto.h> |
18 | #include <linux/fs.h> |
19 | #include <linux/security.h> |
20 | #include <linux/hash.h> |
21 | #include <linux/tpm.h> |
22 | #include <linux/audit.h> |
23 | #include <crypto/hash_info.h> |
24 | |
25 | #include "../integrity.h" |
26 | |
27 | enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_BINARY_NO_FIELD_LEN, |
28 | IMA_SHOW_BINARY_OLD_STRING_FMT, IMA_SHOW_ASCII }; |
29 | enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8, TPM_PCR10 = 10 }; |
30 | |
31 | /* digest size for IMA, fits SHA1 or MD5 */ |
32 | #define IMA_DIGEST_SIZE SHA1_DIGEST_SIZE |
33 | #define IMA_EVENT_NAME_LEN_MAX 255 |
34 | |
35 | #define IMA_HASH_BITS 10 |
36 | #define IMA_MEASURE_HTABLE_SIZE (1 << IMA_HASH_BITS) |
37 | |
38 | #define IMA_TEMPLATE_FIELD_ID_MAX_LEN 16 |
39 | #define IMA_TEMPLATE_NUM_FIELDS_MAX 15 |
40 | |
41 | #define IMA_TEMPLATE_IMA_NAME "ima" |
42 | #define IMA_TEMPLATE_IMA_FMT "d|n" |
43 | |
44 | #define NR_BANKS(chip) ((chip != NULL) ? chip->nr_allocated_banks : 0) |
45 | |
46 | /* current content of the policy */ |
47 | extern int ima_policy_flag; |
48 | |
49 | /* bitset of digests algorithms allowed in the setxattr hook */ |
50 | extern atomic_t ima_setxattr_allowed_hash_algorithms; |
51 | |
52 | /* set during initialization */ |
53 | extern int ima_hash_algo __ro_after_init; |
54 | extern int ima_sha1_idx __ro_after_init; |
55 | extern int ima_hash_algo_idx __ro_after_init; |
56 | extern int __ro_after_init; |
57 | extern int ima_appraise; |
58 | extern struct tpm_chip *ima_tpm_chip; |
59 | extern const char boot_aggregate_name[]; |
60 | |
61 | /* IMA event related data */ |
62 | struct ima_event_data { |
63 | struct ima_iint_cache *iint; |
64 | struct file *file; |
65 | const unsigned char *filename; |
66 | struct evm_ima_xattr_data *xattr_value; |
67 | int xattr_len; |
68 | const struct modsig *modsig; |
69 | const char *violation; |
70 | const void *buf; |
71 | int buf_len; |
72 | }; |
73 | |
74 | /* IMA template field data definition */ |
75 | struct ima_field_data { |
76 | u8 *data; |
77 | u32 len; |
78 | }; |
79 | |
80 | /* IMA template field definition */ |
81 | struct ima_template_field { |
82 | const char field_id[IMA_TEMPLATE_FIELD_ID_MAX_LEN]; |
83 | int (*field_init)(struct ima_event_data *event_data, |
84 | struct ima_field_data *field_data); |
85 | void (*field_show)(struct seq_file *m, enum ima_show_type show, |
86 | struct ima_field_data *field_data); |
87 | }; |
88 | |
89 | /* IMA template descriptor definition */ |
90 | struct ima_template_desc { |
91 | struct list_head list; |
92 | char *name; |
93 | char *fmt; |
94 | int num_fields; |
95 | const struct ima_template_field **fields; |
96 | }; |
97 | |
98 | struct ima_template_entry { |
99 | int pcr; |
100 | struct tpm_digest *digests; |
101 | struct ima_template_desc *template_desc; /* template descriptor */ |
102 | u32 template_data_len; |
103 | struct ima_field_data template_data[]; /* template related data */ |
104 | }; |
105 | |
106 | struct ima_queue_entry { |
107 | struct hlist_node hnext; /* place in hash collision list */ |
108 | struct list_head later; /* place in ima_measurements list */ |
109 | struct ima_template_entry *entry; |
110 | }; |
111 | extern struct list_head ima_measurements; /* list of all measurements */ |
112 | |
113 | /* Some details preceding the binary serialized measurement list */ |
114 | struct ima_kexec_hdr { |
115 | u16 version; |
116 | u16 _reserved0; |
117 | u32 _reserved1; |
118 | u64 buffer_size; |
119 | u64 count; |
120 | }; |
121 | |
122 | /* IMA iint action cache flags */ |
123 | #define IMA_MEASURE 0x00000001 |
124 | #define IMA_MEASURED 0x00000002 |
125 | #define IMA_APPRAISE 0x00000004 |
126 | #define IMA_APPRAISED 0x00000008 |
127 | /*#define IMA_COLLECT 0x00000010 do not use this flag */ |
128 | #define IMA_COLLECTED 0x00000020 |
129 | #define IMA_AUDIT 0x00000040 |
130 | #define IMA_AUDITED 0x00000080 |
131 | #define IMA_HASH 0x00000100 |
132 | #define IMA_HASHED 0x00000200 |
133 | |
134 | /* IMA iint policy rule cache flags */ |
135 | #define IMA_NONACTION_FLAGS 0xff000000 |
136 | #define IMA_DIGSIG_REQUIRED 0x01000000 |
137 | #define IMA_PERMIT_DIRECTIO 0x02000000 |
138 | #define IMA_NEW_FILE 0x04000000 |
139 | #define IMA_FAIL_UNVERIFIABLE_SIGS 0x10000000 |
140 | #define IMA_MODSIG_ALLOWED 0x20000000 |
141 | #define IMA_CHECK_BLACKLIST 0x40000000 |
142 | #define IMA_VERITY_REQUIRED 0x80000000 |
143 | |
144 | #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \ |
145 | IMA_HASH | IMA_APPRAISE_SUBMASK) |
146 | #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \ |
147 | IMA_HASHED | IMA_COLLECTED | \ |
148 | IMA_APPRAISED_SUBMASK) |
149 | |
150 | /* IMA iint subaction appraise cache flags */ |
151 | #define IMA_FILE_APPRAISE 0x00001000 |
152 | #define IMA_FILE_APPRAISED 0x00002000 |
153 | #define IMA_MMAP_APPRAISE 0x00004000 |
154 | #define IMA_MMAP_APPRAISED 0x00008000 |
155 | #define IMA_BPRM_APPRAISE 0x00010000 |
156 | #define IMA_BPRM_APPRAISED 0x00020000 |
157 | #define IMA_READ_APPRAISE 0x00040000 |
158 | #define IMA_READ_APPRAISED 0x00080000 |
159 | #define IMA_CREDS_APPRAISE 0x00100000 |
160 | #define IMA_CREDS_APPRAISED 0x00200000 |
161 | #define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \ |
162 | IMA_BPRM_APPRAISE | IMA_READ_APPRAISE | \ |
163 | IMA_CREDS_APPRAISE) |
164 | #define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \ |
165 | IMA_BPRM_APPRAISED | IMA_READ_APPRAISED | \ |
166 | IMA_CREDS_APPRAISED) |
167 | |
168 | /* IMA iint cache atomic_flags */ |
169 | #define IMA_CHANGE_XATTR 0 |
170 | #define IMA_UPDATE_XATTR 1 |
171 | #define IMA_CHANGE_ATTR 2 |
172 | #define IMA_DIGSIG 3 |
173 | #define IMA_MUST_MEASURE 4 |
174 | |
175 | /* IMA integrity metadata associated with an inode */ |
176 | struct ima_iint_cache { |
177 | struct mutex mutex; /* protects: version, flags, digest */ |
178 | u64 version; /* track inode changes */ |
179 | unsigned long flags; |
180 | unsigned long measured_pcrs; |
181 | unsigned long atomic_flags; |
182 | unsigned long real_ino; |
183 | dev_t real_dev; |
184 | enum integrity_status ima_file_status:4; |
185 | enum integrity_status ima_mmap_status:4; |
186 | enum integrity_status ima_bprm_status:4; |
187 | enum integrity_status ima_read_status:4; |
188 | enum integrity_status ima_creds_status:4; |
189 | struct ima_digest_data *ima_hash; |
190 | }; |
191 | |
192 | extern struct lsm_blob_sizes ima_blob_sizes; |
193 | |
194 | static inline struct ima_iint_cache * |
195 | ima_inode_get_iint(const struct inode *inode) |
196 | { |
197 | struct ima_iint_cache **iint_sec; |
198 | |
199 | if (unlikely(!inode->i_security)) |
200 | return NULL; |
201 | |
202 | iint_sec = inode->i_security + ima_blob_sizes.lbs_inode; |
203 | return *iint_sec; |
204 | } |
205 | |
206 | static inline void ima_inode_set_iint(const struct inode *inode, |
207 | struct ima_iint_cache *iint) |
208 | { |
209 | struct ima_iint_cache **iint_sec; |
210 | |
211 | if (unlikely(!inode->i_security)) |
212 | return; |
213 | |
214 | iint_sec = inode->i_security + ima_blob_sizes.lbs_inode; |
215 | *iint_sec = iint; |
216 | } |
217 | |
218 | struct ima_iint_cache *ima_iint_find(struct inode *inode); |
219 | struct ima_iint_cache *ima_inode_get(struct inode *inode); |
220 | void ima_inode_free(struct inode *inode); |
221 | void __init ima_iintcache_init(void); |
222 | |
223 | extern const int read_idmap[]; |
224 | |
225 | #ifdef CONFIG_HAVE_IMA_KEXEC |
226 | void ima_load_kexec_buffer(void); |
227 | #else |
228 | static inline void ima_load_kexec_buffer(void) {} |
229 | #endif /* CONFIG_HAVE_IMA_KEXEC */ |
230 | |
231 | #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS |
232 | void ima_post_key_create_or_update(struct key *keyring, struct key *key, |
233 | const void *payload, size_t plen, |
234 | unsigned long flags, bool create); |
235 | #endif |
236 | |
237 | /* |
238 | * The default binary_runtime_measurements list format is defined as the |
239 | * platform native format. The canonical format is defined as little-endian. |
240 | */ |
241 | extern bool ima_canonical_fmt; |
242 | |
243 | /* Internal IMA function definitions */ |
244 | int ima_init(void); |
245 | int ima_fs_init(void); |
246 | int ima_add_template_entry(struct ima_template_entry *entry, int violation, |
247 | const char *op, struct inode *inode, |
248 | const unsigned char *filename); |
249 | int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash); |
250 | int ima_calc_buffer_hash(const void *buf, loff_t len, |
251 | struct ima_digest_data *hash); |
252 | int ima_calc_field_array_hash(struct ima_field_data *field_data, |
253 | struct ima_template_entry *entry); |
254 | int ima_calc_boot_aggregate(struct ima_digest_data *hash); |
255 | void ima_add_violation(struct file *file, const unsigned char *filename, |
256 | struct ima_iint_cache *iint, const char *op, |
257 | const char *cause); |
258 | int ima_init_crypto(void); |
259 | void ima_putc(struct seq_file *m, void *data, int datalen); |
260 | void ima_print_digest(struct seq_file *m, u8 *digest, u32 size); |
261 | int template_desc_init_fields(const char *template_fmt, |
262 | const struct ima_template_field ***fields, |
263 | int *num_fields); |
264 | struct ima_template_desc *ima_template_desc_current(void); |
265 | struct ima_template_desc *ima_template_desc_buf(void); |
266 | struct ima_template_desc *lookup_template_desc(const char *name); |
267 | bool ima_template_has_modsig(const struct ima_template_desc *ima_template); |
268 | int ima_restore_measurement_entry(struct ima_template_entry *entry); |
269 | int ima_restore_measurement_list(loff_t bufsize, void *buf); |
270 | int ima_measurements_show(struct seq_file *m, void *v); |
271 | unsigned long ima_get_binary_runtime_size(void); |
272 | int ima_init_template(void); |
273 | void ima_init_template_list(void); |
274 | int __init ima_init_digests(void); |
275 | int ima_lsm_policy_change(struct notifier_block *nb, unsigned long event, |
276 | void *lsm_data); |
277 | |
278 | /* |
279 | * used to protect h_table and sha_table |
280 | */ |
281 | extern spinlock_t ima_queue_lock; |
282 | |
283 | struct ima_h_table { |
284 | atomic_long_t len; /* number of stored measurements in the list */ |
285 | atomic_long_t violations; |
286 | struct hlist_head queue[IMA_MEASURE_HTABLE_SIZE]; |
287 | }; |
288 | extern struct ima_h_table ima_htable; |
289 | |
290 | static inline unsigned int ima_hash_key(u8 *digest) |
291 | { |
292 | /* there is no point in taking a hash of part of a digest */ |
293 | return (digest[0] | digest[1] << 8) % IMA_MEASURE_HTABLE_SIZE; |
294 | } |
295 | |
296 | #define __ima_hooks(hook) \ |
297 | hook(NONE, none) \ |
298 | hook(FILE_CHECK, file) \ |
299 | hook(MMAP_CHECK, mmap) \ |
300 | hook(MMAP_CHECK_REQPROT, mmap_reqprot) \ |
301 | hook(BPRM_CHECK, bprm) \ |
302 | hook(CREDS_CHECK, creds) \ |
303 | hook(POST_SETATTR, post_setattr) \ |
304 | hook(MODULE_CHECK, module) \ |
305 | hook(FIRMWARE_CHECK, firmware) \ |
306 | hook(KEXEC_KERNEL_CHECK, kexec_kernel) \ |
307 | hook(KEXEC_INITRAMFS_CHECK, kexec_initramfs) \ |
308 | hook(POLICY_CHECK, policy) \ |
309 | hook(KEXEC_CMDLINE, kexec_cmdline) \ |
310 | hook(KEY_CHECK, key) \ |
311 | hook(CRITICAL_DATA, critical_data) \ |
312 | hook(SETXATTR_CHECK, setxattr_check) \ |
313 | hook(MAX_CHECK, none) |
314 | |
315 | #define __ima_hook_enumify(ENUM, str) ENUM, |
316 | #define __ima_stringify(arg) (#arg) |
317 | #define __ima_hook_measuring_stringify(ENUM, str) \ |
318 | (__ima_stringify(measuring_ ##str)), |
319 | |
320 | enum ima_hooks { |
321 | __ima_hooks(__ima_hook_enumify) |
322 | }; |
323 | |
324 | static const char * const ima_hooks_measure_str[] = { |
325 | __ima_hooks(__ima_hook_measuring_stringify) |
326 | }; |
327 | |
328 | static inline const char *func_measure_str(enum ima_hooks func) |
329 | { |
330 | if (func >= MAX_CHECK) |
331 | return ima_hooks_measure_str[NONE]; |
332 | |
333 | return ima_hooks_measure_str[func]; |
334 | } |
335 | |
336 | extern const char *const func_tokens[]; |
337 | |
338 | struct modsig; |
339 | |
340 | #ifdef CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS |
341 | /* |
342 | * To track keys that need to be measured. |
343 | */ |
344 | struct ima_key_entry { |
345 | struct list_head list; |
346 | void *payload; |
347 | size_t payload_len; |
348 | char *keyring_name; |
349 | }; |
350 | void ima_init_key_queue(void); |
351 | bool ima_should_queue_key(void); |
352 | bool ima_queue_key(struct key *keyring, const void *payload, |
353 | size_t payload_len); |
354 | void ima_process_queued_keys(void); |
355 | #else |
356 | static inline void ima_init_key_queue(void) {} |
357 | static inline bool ima_should_queue_key(void) { return false; } |
358 | static inline bool ima_queue_key(struct key *keyring, |
359 | const void *payload, |
360 | size_t payload_len) { return false; } |
361 | static inline void ima_process_queued_keys(void) {} |
362 | #endif /* CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS */ |
363 | |
364 | /* LIM API function definitions */ |
365 | int ima_get_action(struct mnt_idmap *idmap, struct inode *inode, |
366 | const struct cred *cred, u32 secid, int mask, |
367 | enum ima_hooks func, int *pcr, |
368 | struct ima_template_desc **template_desc, |
369 | const char *func_data, unsigned int *allowed_algos); |
370 | int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func); |
371 | int ima_collect_measurement(struct ima_iint_cache *iint, struct file *file, |
372 | void *buf, loff_t size, enum hash_algo algo, |
373 | struct modsig *modsig); |
374 | void ima_store_measurement(struct ima_iint_cache *iint, struct file *file, |
375 | const unsigned char *filename, |
376 | struct evm_ima_xattr_data *xattr_value, |
377 | int xattr_len, const struct modsig *modsig, int pcr, |
378 | struct ima_template_desc *template_desc); |
379 | int process_buffer_measurement(struct mnt_idmap *idmap, |
380 | struct inode *inode, const void *buf, int size, |
381 | const char *eventname, enum ima_hooks func, |
382 | int pcr, const char *func_data, |
383 | bool buf_hash, u8 *digest, size_t digest_len); |
384 | void ima_audit_measurement(struct ima_iint_cache *iint, |
385 | const unsigned char *filename); |
386 | int ima_alloc_init_template(struct ima_event_data *event_data, |
387 | struct ima_template_entry **entry, |
388 | struct ima_template_desc *template_desc); |
389 | int ima_store_template(struct ima_template_entry *entry, int violation, |
390 | struct inode *inode, |
391 | const unsigned char *filename, int pcr); |
392 | void ima_free_template_entry(struct ima_template_entry *entry); |
393 | const char *ima_d_path(const struct path *path, char **pathbuf, char *filename); |
394 | |
395 | /* IMA policy related functions */ |
396 | int ima_match_policy(struct mnt_idmap *idmap, struct inode *inode, |
397 | const struct cred *cred, u32 secid, enum ima_hooks func, |
398 | int mask, int flags, int *pcr, |
399 | struct ima_template_desc **template_desc, |
400 | const char *func_data, unsigned int *allowed_algos); |
401 | void ima_init_policy(void); |
402 | void ima_update_policy(void); |
403 | void ima_update_policy_flags(void); |
404 | ssize_t ima_parse_add_rule(char *); |
405 | void ima_delete_rules(void); |
406 | int ima_check_policy(void); |
407 | void *ima_policy_start(struct seq_file *m, loff_t *pos); |
408 | void *ima_policy_next(struct seq_file *m, void *v, loff_t *pos); |
409 | void ima_policy_stop(struct seq_file *m, void *v); |
410 | int ima_policy_show(struct seq_file *m, void *v); |
411 | |
412 | /* Appraise integrity measurements */ |
413 | #define IMA_APPRAISE_ENFORCE 0x01 |
414 | #define IMA_APPRAISE_FIX 0x02 |
415 | #define IMA_APPRAISE_LOG 0x04 |
416 | #define IMA_APPRAISE_MODULES 0x08 |
417 | #define IMA_APPRAISE_FIRMWARE 0x10 |
418 | #define IMA_APPRAISE_POLICY 0x20 |
419 | #define IMA_APPRAISE_KEXEC 0x40 |
420 | |
421 | #ifdef CONFIG_IMA_APPRAISE |
422 | int ima_check_blacklist(struct ima_iint_cache *iint, |
423 | const struct modsig *modsig, int pcr); |
424 | int ima_appraise_measurement(enum ima_hooks func, struct ima_iint_cache *iint, |
425 | struct file *file, const unsigned char *filename, |
426 | struct evm_ima_xattr_data *xattr_value, |
427 | int xattr_len, const struct modsig *modsig); |
428 | int ima_must_appraise(struct mnt_idmap *idmap, struct inode *inode, |
429 | int mask, enum ima_hooks func); |
430 | void ima_update_xattr(struct ima_iint_cache *iint, struct file *file); |
431 | enum integrity_status ima_get_cache_status(struct ima_iint_cache *iint, |
432 | enum ima_hooks func); |
433 | enum hash_algo ima_get_hash_algo(const struct evm_ima_xattr_data *xattr_value, |
434 | int xattr_len); |
435 | int ima_read_xattr(struct dentry *dentry, |
436 | struct evm_ima_xattr_data **xattr_value, int xattr_len); |
437 | void __init init_ima_appraise_lsm(const struct lsm_id *lsmid); |
438 | |
439 | #else |
440 | static inline int ima_check_blacklist(struct ima_iint_cache *iint, |
441 | const struct modsig *modsig, int pcr) |
442 | { |
443 | return 0; |
444 | } |
445 | |
446 | static inline int ima_appraise_measurement(enum ima_hooks func, |
447 | struct ima_iint_cache *iint, |
448 | struct file *file, |
449 | const unsigned char *filename, |
450 | struct evm_ima_xattr_data *xattr_value, |
451 | int xattr_len, |
452 | const struct modsig *modsig) |
453 | { |
454 | return INTEGRITY_UNKNOWN; |
455 | } |
456 | |
457 | static inline int ima_must_appraise(struct mnt_idmap *idmap, |
458 | struct inode *inode, int mask, |
459 | enum ima_hooks func) |
460 | { |
461 | return 0; |
462 | } |
463 | |
464 | static inline void ima_update_xattr(struct ima_iint_cache *iint, |
465 | struct file *file) |
466 | { |
467 | } |
468 | |
469 | static inline enum integrity_status |
470 | ima_get_cache_status(struct ima_iint_cache *iint, enum ima_hooks func) |
471 | { |
472 | return INTEGRITY_UNKNOWN; |
473 | } |
474 | |
475 | static inline enum hash_algo |
476 | ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value, int xattr_len) |
477 | { |
478 | return ima_hash_algo; |
479 | } |
480 | |
481 | static inline int ima_read_xattr(struct dentry *dentry, |
482 | struct evm_ima_xattr_data **xattr_value, |
483 | int xattr_len) |
484 | { |
485 | return 0; |
486 | } |
487 | |
488 | static inline void __init init_ima_appraise_lsm(const struct lsm_id *lsmid) |
489 | { |
490 | } |
491 | |
492 | #endif /* CONFIG_IMA_APPRAISE */ |
493 | |
494 | #ifdef CONFIG_IMA_APPRAISE_MODSIG |
495 | int ima_read_modsig(enum ima_hooks func, const void *buf, loff_t buf_len, |
496 | struct modsig **modsig); |
497 | void ima_collect_modsig(struct modsig *modsig, const void *buf, loff_t size); |
498 | int ima_get_modsig_digest(const struct modsig *modsig, enum hash_algo *algo, |
499 | const u8 **digest, u32 *digest_size); |
500 | int ima_get_raw_modsig(const struct modsig *modsig, const void **data, |
501 | u32 *data_len); |
502 | void ima_free_modsig(struct modsig *modsig); |
503 | #else |
504 | static inline int ima_read_modsig(enum ima_hooks func, const void *buf, |
505 | loff_t buf_len, struct modsig **modsig) |
506 | { |
507 | return -EOPNOTSUPP; |
508 | } |
509 | |
510 | static inline void ima_collect_modsig(struct modsig *modsig, const void *buf, |
511 | loff_t size) |
512 | { |
513 | } |
514 | |
515 | static inline int ima_get_modsig_digest(const struct modsig *modsig, |
516 | enum hash_algo *algo, const u8 **digest, |
517 | u32 *digest_size) |
518 | { |
519 | return -EOPNOTSUPP; |
520 | } |
521 | |
522 | static inline int ima_get_raw_modsig(const struct modsig *modsig, |
523 | const void **data, u32 *data_len) |
524 | { |
525 | return -EOPNOTSUPP; |
526 | } |
527 | |
528 | static inline void ima_free_modsig(struct modsig *modsig) |
529 | { |
530 | } |
531 | #endif /* CONFIG_IMA_APPRAISE_MODSIG */ |
532 | |
533 | /* LSM based policy rules require audit */ |
534 | #ifdef CONFIG_IMA_LSM_RULES |
535 | |
536 | #define ima_filter_rule_init security_audit_rule_init |
537 | #define ima_filter_rule_free security_audit_rule_free |
538 | #define ima_filter_rule_match security_audit_rule_match |
539 | |
540 | #else |
541 | |
542 | static inline int ima_filter_rule_init(u32 field, u32 op, char *rulestr, |
543 | void **lsmrule) |
544 | { |
545 | return -EINVAL; |
546 | } |
547 | |
548 | static inline void ima_filter_rule_free(void *lsmrule) |
549 | { |
550 | } |
551 | |
552 | static inline int ima_filter_rule_match(u32 secid, u32 field, u32 op, |
553 | void *lsmrule) |
554 | { |
555 | return -EINVAL; |
556 | } |
557 | #endif /* CONFIG_IMA_LSM_RULES */ |
558 | |
559 | #ifdef CONFIG_IMA_READ_POLICY |
560 | #define POLICY_FILE_FLAGS (S_IWUSR | S_IRUSR) |
561 | #else |
562 | #define POLICY_FILE_FLAGS S_IWUSR |
563 | #endif /* CONFIG_IMA_READ_POLICY */ |
564 | |
565 | #endif /* __LINUX_IMA_H */ |
566 | |