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66dbc325 MZ |
1 | /* |
2 | * Copyright (C) 2005-2010 IBM Corporation | |
3 | * | |
4 | * Author: | |
5 | * Mimi Zohar <zohar@us.ibm.com> | |
6 | * Kylene Hall <kjhall@us.ibm.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 as published by | |
10 | * the Free Software Foundation, version 2 of the License. | |
11 | * | |
12 | * File: evm_main.c | |
13 | * implements evm_inode_setxattr, evm_inode_post_setxattr, | |
14 | * evm_inode_removexattr, and evm_verifyxattr | |
15 | */ | |
16 | ||
20ee451f JP |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | ||
66dbc325 MZ |
19 | #include <linux/module.h> |
20 | #include <linux/crypto.h> | |
9b97b6cd | 21 | #include <linux/audit.h> |
66dbc325 MZ |
22 | #include <linux/xattr.h> |
23 | #include <linux/integrity.h> | |
3e1be52d | 24 | #include <linux/evm.h> |
50d34394 IM |
25 | #include <linux/magic.h> |
26 | ||
d46eb369 | 27 | #include <crypto/hash.h> |
613317bd | 28 | #include <crypto/algapi.h> |
66dbc325 MZ |
29 | #include "evm.h" |
30 | ||
31 | int evm_initialized; | |
32 | ||
9b97b6cd MZ |
33 | static char *integrity_status_msg[] = { |
34 | "pass", "fail", "no_label", "no_xattrs", "unknown" | |
35 | }; | |
66dbc325 | 36 | char *evm_hmac = "hmac(sha1)"; |
15647eb3 | 37 | char *evm_hash = "sha1"; |
d3b33679 | 38 | int evm_hmac_attrs; |
66dbc325 MZ |
39 | |
40 | char *evm_config_xattrnames[] = { | |
41 | #ifdef CONFIG_SECURITY_SELINUX | |
42 | XATTR_NAME_SELINUX, | |
43 | #endif | |
44 | #ifdef CONFIG_SECURITY_SMACK | |
45 | XATTR_NAME_SMACK, | |
3e38df56 DK |
46 | #ifdef CONFIG_EVM_EXTRA_SMACK_XATTRS |
47 | XATTR_NAME_SMACKEXEC, | |
48 | XATTR_NAME_SMACKTRANSMUTE, | |
49 | XATTR_NAME_SMACKMMAP, | |
50 | #endif | |
2fe5d6de | 51 | #endif |
096b8546 MG |
52 | #ifdef CONFIG_SECURITY_APPARMOR |
53 | XATTR_NAME_APPARMOR, | |
54 | #endif | |
2fe5d6de MZ |
55 | #ifdef CONFIG_IMA_APPRAISE |
56 | XATTR_NAME_IMA, | |
66dbc325 MZ |
57 | #endif |
58 | XATTR_NAME_CAPS, | |
59 | NULL | |
60 | }; | |
61 | ||
7102ebcd MZ |
62 | static int evm_fixmode; |
63 | static int __init evm_set_fixmode(char *str) | |
64 | { | |
65 | if (strncmp(str, "fix", 3) == 0) | |
66 | evm_fixmode = 1; | |
67 | return 0; | |
68 | } | |
69 | __setup("evm=", evm_set_fixmode); | |
70 | ||
d3b33679 DK |
71 | static void __init evm_init_config(void) |
72 | { | |
73 | #ifdef CONFIG_EVM_ATTR_FSUUID | |
74 | evm_hmac_attrs |= EVM_ATTR_FSUUID; | |
75 | #endif | |
76 | pr_info("HMAC attrs: 0x%x\n", evm_hmac_attrs); | |
77 | } | |
78 | ||
15647eb3 DK |
79 | static int evm_find_protected_xattrs(struct dentry *dentry) |
80 | { | |
c6f493d6 | 81 | struct inode *inode = d_backing_inode(dentry); |
15647eb3 DK |
82 | char **xattr; |
83 | int error; | |
84 | int count = 0; | |
85 | ||
5d6c3191 | 86 | if (!(inode->i_opflags & IOP_XATTR)) |
15647eb3 DK |
87 | return -EOPNOTSUPP; |
88 | ||
89 | for (xattr = evm_config_xattrnames; *xattr != NULL; xattr++) { | |
5d6c3191 | 90 | error = __vfs_getxattr(dentry, inode, *xattr, NULL, 0); |
15647eb3 DK |
91 | if (error < 0) { |
92 | if (error == -ENODATA) | |
93 | continue; | |
94 | return error; | |
95 | } | |
96 | count++; | |
97 | } | |
98 | ||
99 | return count; | |
100 | } | |
101 | ||
66dbc325 MZ |
102 | /* |
103 | * evm_verify_hmac - calculate and compare the HMAC with the EVM xattr | |
104 | * | |
105 | * Compute the HMAC on the dentry's protected set of extended attributes | |
7102ebcd MZ |
106 | * and compare it against the stored security.evm xattr. |
107 | * | |
108 | * For performance: | |
109 | * - use the previoulsy retrieved xattr value and length to calculate the | |
110 | * HMAC.) | |
111 | * - cache the verification result in the iint, when available. | |
66dbc325 MZ |
112 | * |
113 | * Returns integrity status | |
114 | */ | |
115 | static enum integrity_status evm_verify_hmac(struct dentry *dentry, | |
116 | const char *xattr_name, | |
117 | char *xattr_value, | |
118 | size_t xattr_value_len, | |
119 | struct integrity_iint_cache *iint) | |
120 | { | |
15647eb3 DK |
121 | struct evm_ima_xattr_data *xattr_data = NULL; |
122 | struct evm_ima_xattr_data calc; | |
566be59a | 123 | enum integrity_status evm_status = INTEGRITY_PASS; |
15647eb3 | 124 | int rc, xattr_len; |
66dbc325 | 125 | |
7102ebcd | 126 | if (iint && iint->evm_status == INTEGRITY_PASS) |
24e0198e | 127 | return iint->evm_status; |
66dbc325 | 128 | |
6d38ca01 DK |
129 | /* if status is not PASS, try to check again - against -ENOMEM */ |
130 | ||
15647eb3 DK |
131 | /* first need to know the sig type */ |
132 | rc = vfs_getxattr_alloc(dentry, XATTR_NAME_EVM, (char **)&xattr_data, 0, | |
133 | GFP_NOFS); | |
134 | if (rc <= 0) { | |
1f100979 DK |
135 | evm_status = INTEGRITY_FAIL; |
136 | if (rc == -ENODATA) { | |
15647eb3 DK |
137 | rc = evm_find_protected_xattrs(dentry); |
138 | if (rc > 0) | |
139 | evm_status = INTEGRITY_NOLABEL; | |
140 | else if (rc == 0) | |
141 | evm_status = INTEGRITY_NOXATTRS; /* new file */ | |
1f100979 DK |
142 | } else if (rc == -EOPNOTSUPP) { |
143 | evm_status = INTEGRITY_UNKNOWN; | |
15647eb3 | 144 | } |
566be59a MZ |
145 | goto out; |
146 | } | |
66dbc325 | 147 | |
b1aaab22 | 148 | xattr_len = rc; |
15647eb3 DK |
149 | |
150 | /* check value type */ | |
151 | switch (xattr_data->type) { | |
152 | case EVM_XATTR_HMAC: | |
b4bfec7f SF |
153 | if (xattr_len != sizeof(struct evm_ima_xattr_data)) { |
154 | evm_status = INTEGRITY_FAIL; | |
155 | goto out; | |
156 | } | |
15647eb3 DK |
157 | rc = evm_calc_hmac(dentry, xattr_name, xattr_value, |
158 | xattr_value_len, calc.digest); | |
159 | if (rc) | |
160 | break; | |
613317bd | 161 | rc = crypto_memneq(xattr_data->digest, calc.digest, |
15647eb3 DK |
162 | sizeof(calc.digest)); |
163 | if (rc) | |
164 | rc = -EINVAL; | |
165 | break; | |
166 | case EVM_IMA_XATTR_DIGSIG: | |
167 | rc = evm_calc_hash(dentry, xattr_name, xattr_value, | |
168 | xattr_value_len, calc.digest); | |
169 | if (rc) | |
170 | break; | |
171 | rc = integrity_digsig_verify(INTEGRITY_KEYRING_EVM, | |
b1aaab22 | 172 | (const char *)xattr_data, xattr_len, |
15647eb3 DK |
173 | calc.digest, sizeof(calc.digest)); |
174 | if (!rc) { | |
c2baec7f DK |
175 | /* Replace RSA with HMAC if not mounted readonly and |
176 | * not immutable | |
177 | */ | |
c6f493d6 DH |
178 | if (!IS_RDONLY(d_backing_inode(dentry)) && |
179 | !IS_IMMUTABLE(d_backing_inode(dentry))) | |
c2baec7f DK |
180 | evm_update_evmxattr(dentry, xattr_name, |
181 | xattr_value, | |
182 | xattr_value_len); | |
15647eb3 DK |
183 | } |
184 | break; | |
185 | default: | |
186 | rc = -EINVAL; | |
187 | break; | |
188 | } | |
189 | ||
190 | if (rc) | |
191 | evm_status = (rc == -ENODATA) ? | |
192 | INTEGRITY_NOXATTRS : INTEGRITY_FAIL; | |
7102ebcd MZ |
193 | out: |
194 | if (iint) | |
195 | iint->evm_status = evm_status; | |
15647eb3 | 196 | kfree(xattr_data); |
7102ebcd | 197 | return evm_status; |
66dbc325 MZ |
198 | } |
199 | ||
200 | static int evm_protected_xattr(const char *req_xattr_name) | |
201 | { | |
202 | char **xattrname; | |
203 | int namelen; | |
204 | int found = 0; | |
205 | ||
206 | namelen = strlen(req_xattr_name); | |
207 | for (xattrname = evm_config_xattrnames; *xattrname != NULL; xattrname++) { | |
208 | if ((strlen(*xattrname) == namelen) | |
209 | && (strncmp(req_xattr_name, *xattrname, namelen) == 0)) { | |
210 | found = 1; | |
211 | break; | |
212 | } | |
cb723180 MZ |
213 | if (strncmp(req_xattr_name, |
214 | *xattrname + XATTR_SECURITY_PREFIX_LEN, | |
215 | strlen(req_xattr_name)) == 0) { | |
216 | found = 1; | |
217 | break; | |
218 | } | |
66dbc325 MZ |
219 | } |
220 | return found; | |
221 | } | |
222 | ||
223 | /** | |
224 | * evm_verifyxattr - verify the integrity of the requested xattr | |
225 | * @dentry: object of the verify xattr | |
226 | * @xattr_name: requested xattr | |
227 | * @xattr_value: requested xattr value | |
228 | * @xattr_value_len: requested xattr value length | |
229 | * | |
230 | * Calculate the HMAC for the given dentry and verify it against the stored | |
231 | * security.evm xattr. For performance, use the xattr value and length | |
232 | * previously retrieved to calculate the HMAC. | |
233 | * | |
234 | * Returns the xattr integrity status. | |
235 | * | |
236 | * This function requires the caller to lock the inode's i_mutex before it | |
237 | * is executed. | |
238 | */ | |
239 | enum integrity_status evm_verifyxattr(struct dentry *dentry, | |
240 | const char *xattr_name, | |
2960e6cb DK |
241 | void *xattr_value, size_t xattr_value_len, |
242 | struct integrity_iint_cache *iint) | |
66dbc325 | 243 | { |
66dbc325 MZ |
244 | if (!evm_initialized || !evm_protected_xattr(xattr_name)) |
245 | return INTEGRITY_UNKNOWN; | |
246 | ||
2960e6cb | 247 | if (!iint) { |
c6f493d6 | 248 | iint = integrity_iint_find(d_backing_inode(dentry)); |
2960e6cb DK |
249 | if (!iint) |
250 | return INTEGRITY_UNKNOWN; | |
251 | } | |
252 | return evm_verify_hmac(dentry, xattr_name, xattr_value, | |
66dbc325 | 253 | xattr_value_len, iint); |
66dbc325 MZ |
254 | } |
255 | EXPORT_SYMBOL_GPL(evm_verifyxattr); | |
256 | ||
7102ebcd MZ |
257 | /* |
258 | * evm_verify_current_integrity - verify the dentry's metadata integrity | |
259 | * @dentry: pointer to the affected dentry | |
260 | * | |
261 | * Verify and return the dentry's metadata integrity. The exceptions are | |
262 | * before EVM is initialized or in 'fix' mode. | |
263 | */ | |
264 | static enum integrity_status evm_verify_current_integrity(struct dentry *dentry) | |
265 | { | |
c6f493d6 | 266 | struct inode *inode = d_backing_inode(dentry); |
7102ebcd MZ |
267 | |
268 | if (!evm_initialized || !S_ISREG(inode->i_mode) || evm_fixmode) | |
269 | return 0; | |
270 | return evm_verify_hmac(dentry, NULL, NULL, 0, NULL); | |
271 | } | |
272 | ||
a924ce0b MZ |
273 | /* |
274 | * evm_protect_xattr - protect the EVM extended attribute | |
275 | * | |
bf6d0f5d MZ |
276 | * Prevent security.evm from being modified or removed without the |
277 | * necessary permissions or when the existing value is invalid. | |
278 | * | |
279 | * The posix xattr acls are 'system' prefixed, which normally would not | |
280 | * affect security.evm. An interesting side affect of writing posix xattr | |
281 | * acls is their modifying of the i_mode, which is included in security.evm. | |
282 | * For posix xattr acls only, permit security.evm, even if it currently | |
283 | * doesn't exist, to be updated. | |
a924ce0b MZ |
284 | */ |
285 | static int evm_protect_xattr(struct dentry *dentry, const char *xattr_name, | |
286 | const void *xattr_value, size_t xattr_value_len) | |
287 | { | |
288 | enum integrity_status evm_status; | |
289 | ||
290 | if (strcmp(xattr_name, XATTR_NAME_EVM) == 0) { | |
291 | if (!capable(CAP_SYS_ADMIN)) | |
292 | return -EPERM; | |
bf6d0f5d MZ |
293 | } else if (!evm_protected_xattr(xattr_name)) { |
294 | if (!posix_xattr_acl(xattr_name)) | |
295 | return 0; | |
296 | evm_status = evm_verify_current_integrity(dentry); | |
297 | if ((evm_status == INTEGRITY_PASS) || | |
566be59a | 298 | (evm_status == INTEGRITY_NOXATTRS)) |
bf6d0f5d | 299 | return 0; |
9b97b6cd | 300 | goto out; |
bf6d0f5d | 301 | } |
a924ce0b | 302 | evm_status = evm_verify_current_integrity(dentry); |
3dcbad52 DK |
303 | if (evm_status == INTEGRITY_NOXATTRS) { |
304 | struct integrity_iint_cache *iint; | |
305 | ||
c6f493d6 | 306 | iint = integrity_iint_find(d_backing_inode(dentry)); |
3dcbad52 DK |
307 | if (iint && (iint->flags & IMA_NEW_FILE)) |
308 | return 0; | |
5101a185 MZ |
309 | |
310 | /* exception for pseudo filesystems */ | |
fc64005c AV |
311 | if (dentry->d_sb->s_magic == TMPFS_MAGIC |
312 | || dentry->d_sb->s_magic == SYSFS_MAGIC) | |
5101a185 MZ |
313 | return 0; |
314 | ||
315 | integrity_audit_msg(AUDIT_INTEGRITY_METADATA, | |
316 | dentry->d_inode, dentry->d_name.name, | |
317 | "update_metadata", | |
318 | integrity_status_msg[evm_status], | |
319 | -EPERM, 0); | |
3dcbad52 | 320 | } |
9b97b6cd MZ |
321 | out: |
322 | if (evm_status != INTEGRITY_PASS) | |
c6f493d6 | 323 | integrity_audit_msg(AUDIT_INTEGRITY_METADATA, d_backing_inode(dentry), |
9b97b6cd MZ |
324 | dentry->d_name.name, "appraise_metadata", |
325 | integrity_status_msg[evm_status], | |
326 | -EPERM, 0); | |
a924ce0b MZ |
327 | return evm_status == INTEGRITY_PASS ? 0 : -EPERM; |
328 | } | |
329 | ||
66dbc325 MZ |
330 | /** |
331 | * evm_inode_setxattr - protect the EVM extended attribute | |
332 | * @dentry: pointer to the affected dentry | |
333 | * @xattr_name: pointer to the affected extended attribute name | |
334 | * @xattr_value: pointer to the new extended attribute value | |
335 | * @xattr_value_len: pointer to the new extended attribute value length | |
336 | * | |
2fb1c9a4 MZ |
337 | * Before allowing the 'security.evm' protected xattr to be updated, |
338 | * verify the existing value is valid. As only the kernel should have | |
339 | * access to the EVM encrypted key needed to calculate the HMAC, prevent | |
340 | * userspace from writing HMAC value. Writing 'security.evm' requires | |
341 | * requires CAP_SYS_ADMIN privileges. | |
66dbc325 MZ |
342 | */ |
343 | int evm_inode_setxattr(struct dentry *dentry, const char *xattr_name, | |
344 | const void *xattr_value, size_t xattr_value_len) | |
345 | { | |
2fb1c9a4 MZ |
346 | const struct evm_ima_xattr_data *xattr_data = xattr_value; |
347 | ||
3b1deef6 DK |
348 | if (strcmp(xattr_name, XATTR_NAME_EVM) == 0) { |
349 | if (!xattr_value_len) | |
350 | return -EINVAL; | |
351 | if (xattr_data->type != EVM_IMA_XATTR_DIGSIG) | |
352 | return -EPERM; | |
353 | } | |
a924ce0b MZ |
354 | return evm_protect_xattr(dentry, xattr_name, xattr_value, |
355 | xattr_value_len); | |
66dbc325 MZ |
356 | } |
357 | ||
358 | /** | |
359 | * evm_inode_removexattr - protect the EVM extended attribute | |
360 | * @dentry: pointer to the affected dentry | |
361 | * @xattr_name: pointer to the affected extended attribute name | |
362 | * | |
7102ebcd MZ |
363 | * Removing 'security.evm' requires CAP_SYS_ADMIN privileges and that |
364 | * the current value is valid. | |
66dbc325 MZ |
365 | */ |
366 | int evm_inode_removexattr(struct dentry *dentry, const char *xattr_name) | |
367 | { | |
a924ce0b | 368 | return evm_protect_xattr(dentry, xattr_name, NULL, 0); |
66dbc325 MZ |
369 | } |
370 | ||
523b74b1 DK |
371 | static void evm_reset_status(struct inode *inode) |
372 | { | |
373 | struct integrity_iint_cache *iint; | |
374 | ||
375 | iint = integrity_iint_find(inode); | |
376 | if (iint) | |
377 | iint->evm_status = INTEGRITY_UNKNOWN; | |
378 | } | |
379 | ||
66dbc325 MZ |
380 | /** |
381 | * evm_inode_post_setxattr - update 'security.evm' to reflect the changes | |
382 | * @dentry: pointer to the affected dentry | |
383 | * @xattr_name: pointer to the affected extended attribute name | |
384 | * @xattr_value: pointer to the new extended attribute value | |
385 | * @xattr_value_len: pointer to the new extended attribute value length | |
386 | * | |
387 | * Update the HMAC stored in 'security.evm' to reflect the change. | |
388 | * | |
389 | * No need to take the i_mutex lock here, as this function is called from | |
390 | * __vfs_setxattr_noperm(). The caller of which has taken the inode's | |
391 | * i_mutex lock. | |
392 | */ | |
393 | void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name, | |
394 | const void *xattr_value, size_t xattr_value_len) | |
395 | { | |
bf6d0f5d MZ |
396 | if (!evm_initialized || (!evm_protected_xattr(xattr_name) |
397 | && !posix_xattr_acl(xattr_name))) | |
66dbc325 MZ |
398 | return; |
399 | ||
523b74b1 DK |
400 | evm_reset_status(dentry->d_inode); |
401 | ||
66dbc325 | 402 | evm_update_evmxattr(dentry, xattr_name, xattr_value, xattr_value_len); |
66dbc325 MZ |
403 | } |
404 | ||
405 | /** | |
406 | * evm_inode_post_removexattr - update 'security.evm' after removing the xattr | |
407 | * @dentry: pointer to the affected dentry | |
408 | * @xattr_name: pointer to the affected extended attribute name | |
409 | * | |
410 | * Update the HMAC stored in 'security.evm' to reflect removal of the xattr. | |
7c51bb00 DK |
411 | * |
412 | * No need to take the i_mutex lock here, as this function is called from | |
413 | * vfs_removexattr() which takes the i_mutex. | |
66dbc325 MZ |
414 | */ |
415 | void evm_inode_post_removexattr(struct dentry *dentry, const char *xattr_name) | |
416 | { | |
66dbc325 MZ |
417 | if (!evm_initialized || !evm_protected_xattr(xattr_name)) |
418 | return; | |
419 | ||
523b74b1 DK |
420 | evm_reset_status(dentry->d_inode); |
421 | ||
66dbc325 | 422 | evm_update_evmxattr(dentry, xattr_name, NULL, 0); |
66dbc325 MZ |
423 | } |
424 | ||
817b54aa MZ |
425 | /** |
426 | * evm_inode_setattr - prevent updating an invalid EVM extended attribute | |
427 | * @dentry: pointer to the affected dentry | |
428 | */ | |
429 | int evm_inode_setattr(struct dentry *dentry, struct iattr *attr) | |
430 | { | |
431 | unsigned int ia_valid = attr->ia_valid; | |
432 | enum integrity_status evm_status; | |
433 | ||
a924ce0b | 434 | if (!(ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))) |
817b54aa MZ |
435 | return 0; |
436 | evm_status = evm_verify_current_integrity(dentry); | |
566be59a MZ |
437 | if ((evm_status == INTEGRITY_PASS) || |
438 | (evm_status == INTEGRITY_NOXATTRS)) | |
439 | return 0; | |
c6f493d6 | 440 | integrity_audit_msg(AUDIT_INTEGRITY_METADATA, d_backing_inode(dentry), |
9b97b6cd MZ |
441 | dentry->d_name.name, "appraise_metadata", |
442 | integrity_status_msg[evm_status], -EPERM, 0); | |
566be59a | 443 | return -EPERM; |
817b54aa MZ |
444 | } |
445 | ||
66dbc325 MZ |
446 | /** |
447 | * evm_inode_post_setattr - update 'security.evm' after modifying metadata | |
448 | * @dentry: pointer to the affected dentry | |
449 | * @ia_valid: for the UID and GID status | |
450 | * | |
451 | * For now, update the HMAC stored in 'security.evm' to reflect UID/GID | |
452 | * changes. | |
453 | * | |
454 | * This function is called from notify_change(), which expects the caller | |
455 | * to lock the inode's i_mutex. | |
456 | */ | |
457 | void evm_inode_post_setattr(struct dentry *dentry, int ia_valid) | |
458 | { | |
459 | if (!evm_initialized) | |
460 | return; | |
461 | ||
462 | if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)) | |
463 | evm_update_evmxattr(dentry, NULL, NULL, 0); | |
66dbc325 MZ |
464 | } |
465 | ||
cb723180 MZ |
466 | /* |
467 | * evm_inode_init_security - initializes security.evm | |
468 | */ | |
469 | int evm_inode_init_security(struct inode *inode, | |
470 | const struct xattr *lsm_xattr, | |
471 | struct xattr *evm_xattr) | |
472 | { | |
473 | struct evm_ima_xattr_data *xattr_data; | |
474 | int rc; | |
475 | ||
476 | if (!evm_initialized || !evm_protected_xattr(lsm_xattr->name)) | |
5a4730ba | 477 | return 0; |
cb723180 MZ |
478 | |
479 | xattr_data = kzalloc(sizeof(*xattr_data), GFP_NOFS); | |
480 | if (!xattr_data) | |
481 | return -ENOMEM; | |
482 | ||
483 | xattr_data->type = EVM_XATTR_HMAC; | |
484 | rc = evm_init_hmac(inode, lsm_xattr, xattr_data->digest); | |
485 | if (rc < 0) | |
486 | goto out; | |
487 | ||
488 | evm_xattr->value = xattr_data; | |
489 | evm_xattr->value_len = sizeof(*xattr_data); | |
9548906b | 490 | evm_xattr->name = XATTR_EVM_SUFFIX; |
cb723180 MZ |
491 | return 0; |
492 | out: | |
493 | kfree(xattr_data); | |
494 | return rc; | |
495 | } | |
496 | EXPORT_SYMBOL_GPL(evm_inode_init_security); | |
497 | ||
2ce523eb DK |
498 | #ifdef CONFIG_EVM_LOAD_X509 |
499 | void __init evm_load_x509(void) | |
500 | { | |
26ddabfe DK |
501 | int rc; |
502 | ||
503 | rc = integrity_load_x509(INTEGRITY_KEYRING_EVM, CONFIG_EVM_X509_PATH); | |
504 | if (!rc) | |
505 | evm_initialized |= EVM_INIT_X509; | |
2ce523eb DK |
506 | } |
507 | #endif | |
508 | ||
66dbc325 MZ |
509 | static int __init init_evm(void) |
510 | { | |
511 | int error; | |
512 | ||
d3b33679 DK |
513 | evm_init_config(); |
514 | ||
f4dc3778 DK |
515 | error = integrity_init_keyring(INTEGRITY_KEYRING_EVM); |
516 | if (error) | |
517 | return error; | |
518 | ||
66dbc325 MZ |
519 | error = evm_init_secfs(); |
520 | if (error < 0) { | |
20ee451f | 521 | pr_info("Error registering secfs\n"); |
f4dc3778 | 522 | return error; |
66dbc325 | 523 | } |
15647eb3 DK |
524 | |
525 | return 0; | |
66dbc325 MZ |
526 | } |
527 | ||
66dbc325 MZ |
528 | /* |
529 | * evm_display_config - list the EVM protected security extended attributes | |
530 | */ | |
531 | static int __init evm_display_config(void) | |
532 | { | |
533 | char **xattrname; | |
534 | ||
535 | for (xattrname = evm_config_xattrnames; *xattrname != NULL; xattrname++) | |
20ee451f | 536 | pr_info("%s\n", *xattrname); |
66dbc325 MZ |
537 | return 0; |
538 | } | |
539 | ||
540 | pure_initcall(evm_display_config); | |
541 | late_initcall(init_evm); | |
542 | ||
543 | MODULE_DESCRIPTION("Extended Verification Module"); | |
544 | MODULE_LICENSE("GPL"); |