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237fead6 MH |
1 | /** |
2 | * eCryptfs: Linux filesystem encryption layer | |
3 | * Kernel declarations. | |
4 | * | |
5 | * Copyright (C) 1997-2003 Erez Zadok | |
6 | * Copyright (C) 2001-2003 Stony Brook University | |
7 | * Copyright (C) 2004-2006 International Business Machines Corp. | |
8 | * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License as | |
12 | * published by the Free Software Foundation; either version 2 of the | |
13 | * License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
23 | * 02111-1307, USA. | |
24 | */ | |
25 | ||
26 | #ifndef ECRYPTFS_KERNEL_H | |
27 | #define ECRYPTFS_KERNEL_H | |
28 | ||
29 | #include <keys/user-type.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/scatterlist.h> | |
32 | ||
33 | /* Version verification for shared data structures w/ userspace */ | |
34 | #define ECRYPTFS_VERSION_MAJOR 0x00 | |
35 | #define ECRYPTFS_VERSION_MINOR 0x04 | |
36 | #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x01 | |
37 | /* These flags indicate which features are supported by the kernel | |
38 | * module; userspace tools such as the mount helper read | |
39 | * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine | |
40 | * how to behave. */ | |
41 | #define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001 | |
42 | #define ECRYPTFS_VERSIONING_PUBKEY 0x00000002 | |
43 | #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004 | |
44 | #define ECRYPTFS_VERSIONING_POLICY 0x00000008 | |
45 | #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ | |
46 | | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH) | |
47 | ||
48 | #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 | |
49 | #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH | |
50 | #define ECRYPTFS_SALT_SIZE 8 | |
51 | #define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2) | |
52 | /* The original signature size is only for what is stored on disk; all | |
53 | * in-memory representations are expanded hex, so it better adapted to | |
54 | * be passed around or referenced on the command line */ | |
55 | #define ECRYPTFS_SIG_SIZE 8 | |
56 | #define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2) | |
57 | #define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX | |
58 | #define ECRYPTFS_MAX_KEY_BYTES 64 | |
59 | #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512 | |
60 | #define ECRYPTFS_DEFAULT_IV_BYTES 16 | |
61 | #define ECRYPTFS_FILE_VERSION 0x01 | |
62 | #define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192 | |
63 | #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 | |
64 | #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 | |
65 | ||
66 | #define RFC2440_CIPHER_DES3_EDE 0x02 | |
67 | #define RFC2440_CIPHER_CAST_5 0x03 | |
68 | #define RFC2440_CIPHER_BLOWFISH 0x04 | |
69 | #define RFC2440_CIPHER_AES_128 0x07 | |
70 | #define RFC2440_CIPHER_AES_192 0x08 | |
71 | #define RFC2440_CIPHER_AES_256 0x09 | |
72 | #define RFC2440_CIPHER_TWOFISH 0x0a | |
73 | #define RFC2440_CIPHER_CAST_6 0x0b | |
74 | ||
75 | #define ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag)) | |
76 | #define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag)) | |
77 | #define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag)) | |
78 | ||
79 | /** | |
80 | * For convenience, we may need to pass around the encrypted session | |
81 | * key between kernel and userspace because the authentication token | |
82 | * may not be extractable. For example, the TPM may not release the | |
83 | * private key, instead requiring the encrypted data and returning the | |
84 | * decrypted data. | |
85 | */ | |
86 | struct ecryptfs_session_key { | |
87 | #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001 | |
88 | #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002 | |
89 | #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004 | |
90 | #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008 | |
91 | u32 flags; | |
92 | u32 encrypted_key_size; | |
93 | u32 decrypted_key_size; | |
94 | u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; | |
95 | u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES]; | |
96 | }; | |
97 | ||
98 | struct ecryptfs_password { | |
99 | u32 password_bytes; | |
100 | s32 hash_algo; | |
101 | u32 hash_iterations; | |
102 | u32 session_key_encryption_key_bytes; | |
103 | #define ECRYPTFS_PERSISTENT_PASSWORD 0x01 | |
104 | #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02 | |
105 | u32 flags; | |
106 | /* Iterated-hash concatenation of salt and passphrase */ | |
107 | u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; | |
108 | u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; | |
109 | /* Always in expanded hex */ | |
110 | u8 salt[ECRYPTFS_SALT_SIZE]; | |
111 | }; | |
112 | ||
113 | enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; | |
114 | ||
115 | /* May be a password or a private key */ | |
116 | struct ecryptfs_auth_tok { | |
117 | u16 version; /* 8-bit major and 8-bit minor */ | |
118 | u16 token_type; | |
119 | u32 flags; | |
120 | struct ecryptfs_session_key session_key; | |
121 | u8 reserved[32]; | |
122 | union { | |
123 | struct ecryptfs_password password; | |
124 | /* Private key is in future eCryptfs releases */ | |
125 | } token; | |
126 | } __attribute__ ((packed)); | |
127 | ||
128 | void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); | |
129 | extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); | |
130 | extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); | |
131 | ||
132 | struct ecryptfs_key_record { | |
133 | unsigned char type; | |
134 | size_t enc_key_size; | |
135 | unsigned char sig[ECRYPTFS_SIG_SIZE]; | |
136 | unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; | |
137 | }; | |
138 | ||
139 | struct ecryptfs_auth_tok_list { | |
140 | struct ecryptfs_auth_tok *auth_tok; | |
141 | struct list_head list; | |
142 | }; | |
143 | ||
144 | struct ecryptfs_crypt_stat; | |
145 | struct ecryptfs_mount_crypt_stat; | |
146 | ||
147 | struct ecryptfs_page_crypt_context { | |
148 | struct page *page; | |
149 | #define ECRYPTFS_PREPARE_COMMIT_MODE 0 | |
150 | #define ECRYPTFS_WRITEPAGE_MODE 1 | |
151 | unsigned int mode; | |
152 | union { | |
153 | struct file *lower_file; | |
154 | struct writeback_control *wbc; | |
155 | } param; | |
156 | }; | |
157 | ||
158 | static inline struct ecryptfs_auth_tok * | |
159 | ecryptfs_get_key_payload_data(struct key *key) | |
160 | { | |
161 | return (struct ecryptfs_auth_tok *) | |
162 | (((struct user_key_payload*)key->payload.data)->data); | |
163 | } | |
164 | ||
165 | #define ECRYPTFS_SUPER_MAGIC 0xf15f | |
166 | #define ECRYPTFS_MAX_KEYSET_SIZE 1024 | |
167 | #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 | |
168 | #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 | |
169 | #define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */ | |
170 | #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ | |
171 | #define ECRYPTFS_SALT_BYTES 2 | |
172 | #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 | |
173 | #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ | |
174 | #define ECRYPTFS_FILE_SIZE_BYTES 8 | |
175 | #define ECRYPTFS_DEFAULT_CIPHER "aes" | |
176 | #define ECRYPTFS_DEFAULT_KEY_BYTES 16 | |
177 | #define ECRYPTFS_DEFAULT_CHAINING_MODE CRYPTO_TFM_MODE_CBC | |
565d9724 | 178 | #define ECRYPTFS_DEFAULT_HASH "md5" |
237fead6 MH |
179 | #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C |
180 | #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED | |
181 | #define MD5_DIGEST_SIZE 16 | |
182 | ||
183 | /** | |
184 | * This is the primary struct associated with each encrypted file. | |
185 | * | |
186 | * TODO: cache align/pack? | |
187 | */ | |
188 | struct ecryptfs_crypt_stat { | |
189 | #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 | |
190 | #define ECRYPTFS_POLICY_APPLIED 0x00000002 | |
191 | #define ECRYPTFS_NEW_FILE 0x00000004 | |
192 | #define ECRYPTFS_ENCRYPTED 0x00000008 | |
193 | #define ECRYPTFS_SECURITY_WARNING 0x00000010 | |
194 | #define ECRYPTFS_ENABLE_HMAC 0x00000020 | |
195 | #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 | |
196 | #define ECRYPTFS_KEY_VALID 0x00000080 | |
197 | u32 flags; | |
198 | unsigned int file_version; | |
199 | size_t iv_bytes; | |
200 | size_t num_keysigs; | |
201 | size_t header_extent_size; | |
202 | size_t num_header_extents_at_front; | |
203 | size_t extent_size; /* Data extent size; default is 4096 */ | |
204 | size_t key_size; | |
205 | size_t extent_shift; | |
206 | unsigned int extent_mask; | |
207 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; | |
8bba066f | 208 | struct crypto_blkcipher *tfm; |
565d9724 MH |
209 | struct crypto_hash *hash_tfm; /* Crypto context for generating |
210 | * the initialization vectors */ | |
237fead6 MH |
211 | unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; |
212 | unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; | |
213 | unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; | |
214 | unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX]; | |
215 | struct mutex cs_tfm_mutex; | |
565d9724 | 216 | struct mutex cs_hash_tfm_mutex; |
237fead6 MH |
217 | struct mutex cs_mutex; |
218 | }; | |
219 | ||
220 | /* inode private data. */ | |
221 | struct ecryptfs_inode_info { | |
222 | struct inode vfs_inode; | |
223 | struct inode *wii_inode; | |
224 | struct ecryptfs_crypt_stat crypt_stat; | |
225 | }; | |
226 | ||
227 | /* dentry private data. Each dentry must keep track of a lower | |
228 | * vfsmount too. */ | |
229 | struct ecryptfs_dentry_info { | |
230 | struct dentry *wdi_dentry; | |
231 | struct vfsmount *lower_mnt; | |
232 | struct ecryptfs_crypt_stat *crypt_stat; | |
233 | }; | |
234 | ||
235 | /** | |
236 | * This struct is to enable a mount-wide passphrase/salt combo. This | |
237 | * is more or less a stopgap to provide similar functionality to other | |
238 | * crypto filesystems like EncFS or CFS until full policy support is | |
239 | * implemented in eCryptfs. | |
240 | */ | |
241 | struct ecryptfs_mount_crypt_stat { | |
242 | /* Pointers to memory we do not own, do not free these */ | |
243 | #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 | |
244 | u32 flags; | |
245 | struct ecryptfs_auth_tok *global_auth_tok; | |
246 | struct key *global_auth_tok_key; | |
247 | size_t global_default_cipher_key_size; | |
8bba066f | 248 | struct crypto_blkcipher *global_key_tfm; |
237fead6 MH |
249 | struct mutex global_key_tfm_mutex; |
250 | unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE | |
251 | + 1]; | |
252 | unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; | |
253 | }; | |
254 | ||
255 | /* superblock private data. */ | |
256 | struct ecryptfs_sb_info { | |
257 | struct super_block *wsi_sb; | |
258 | struct ecryptfs_mount_crypt_stat mount_crypt_stat; | |
259 | }; | |
260 | ||
261 | /* file private data. */ | |
262 | struct ecryptfs_file_info { | |
263 | struct file *wfi_file; | |
264 | struct ecryptfs_crypt_stat *crypt_stat; | |
265 | }; | |
266 | ||
267 | /* auth_tok <=> encrypted_session_key mappings */ | |
268 | struct ecryptfs_auth_tok_list_item { | |
269 | unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; | |
270 | struct list_head list; | |
271 | struct ecryptfs_auth_tok auth_tok; | |
272 | }; | |
273 | ||
274 | static inline struct ecryptfs_file_info * | |
275 | ecryptfs_file_to_private(struct file *file) | |
276 | { | |
277 | return (struct ecryptfs_file_info *)file->private_data; | |
278 | } | |
279 | ||
280 | static inline void | |
281 | ecryptfs_set_file_private(struct file *file, | |
282 | struct ecryptfs_file_info *file_info) | |
283 | { | |
284 | file->private_data = file_info; | |
285 | } | |
286 | ||
287 | static inline struct file *ecryptfs_file_to_lower(struct file *file) | |
288 | { | |
289 | return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; | |
290 | } | |
291 | ||
292 | static inline void | |
293 | ecryptfs_set_file_lower(struct file *file, struct file *lower_file) | |
294 | { | |
295 | ((struct ecryptfs_file_info *)file->private_data)->wfi_file = | |
296 | lower_file; | |
297 | } | |
298 | ||
299 | static inline struct ecryptfs_inode_info * | |
300 | ecryptfs_inode_to_private(struct inode *inode) | |
301 | { | |
302 | return container_of(inode, struct ecryptfs_inode_info, vfs_inode); | |
303 | } | |
304 | ||
305 | static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) | |
306 | { | |
307 | return ecryptfs_inode_to_private(inode)->wii_inode; | |
308 | } | |
309 | ||
310 | static inline void | |
311 | ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) | |
312 | { | |
313 | ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; | |
314 | } | |
315 | ||
316 | static inline struct ecryptfs_sb_info * | |
317 | ecryptfs_superblock_to_private(struct super_block *sb) | |
318 | { | |
319 | return (struct ecryptfs_sb_info *)sb->s_fs_info; | |
320 | } | |
321 | ||
322 | static inline void | |
323 | ecryptfs_set_superblock_private(struct super_block *sb, | |
324 | struct ecryptfs_sb_info *sb_info) | |
325 | { | |
326 | sb->s_fs_info = sb_info; | |
327 | } | |
328 | ||
329 | static inline struct super_block * | |
330 | ecryptfs_superblock_to_lower(struct super_block *sb) | |
331 | { | |
332 | return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; | |
333 | } | |
334 | ||
335 | static inline void | |
336 | ecryptfs_set_superblock_lower(struct super_block *sb, | |
337 | struct super_block *lower_sb) | |
338 | { | |
339 | ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; | |
340 | } | |
341 | ||
342 | static inline struct ecryptfs_dentry_info * | |
343 | ecryptfs_dentry_to_private(struct dentry *dentry) | |
344 | { | |
345 | return (struct ecryptfs_dentry_info *)dentry->d_fsdata; | |
346 | } | |
347 | ||
348 | static inline void | |
349 | ecryptfs_set_dentry_private(struct dentry *dentry, | |
350 | struct ecryptfs_dentry_info *dentry_info) | |
351 | { | |
352 | dentry->d_fsdata = dentry_info; | |
353 | } | |
354 | ||
355 | static inline struct dentry * | |
356 | ecryptfs_dentry_to_lower(struct dentry *dentry) | |
357 | { | |
358 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->wdi_dentry; | |
359 | } | |
360 | ||
361 | static inline void | |
362 | ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) | |
363 | { | |
364 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->wdi_dentry = | |
365 | lower_dentry; | |
366 | } | |
367 | ||
368 | static inline struct vfsmount * | |
369 | ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) | |
370 | { | |
371 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_mnt; | |
372 | } | |
373 | ||
374 | static inline void | |
375 | ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) | |
376 | { | |
377 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_mnt = | |
378 | lower_mnt; | |
379 | } | |
380 | ||
381 | #define ecryptfs_printk(type, fmt, arg...) \ | |
382 | __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); | |
383 | void __ecryptfs_printk(const char *fmt, ...); | |
384 | ||
385 | extern const struct file_operations ecryptfs_main_fops; | |
386 | extern const struct file_operations ecryptfs_dir_fops; | |
387 | extern struct inode_operations ecryptfs_main_iops; | |
388 | extern struct inode_operations ecryptfs_dir_iops; | |
389 | extern struct inode_operations ecryptfs_symlink_iops; | |
390 | extern struct super_operations ecryptfs_sops; | |
391 | extern struct dentry_operations ecryptfs_dops; | |
392 | extern struct address_space_operations ecryptfs_aops; | |
393 | extern int ecryptfs_verbosity; | |
394 | ||
395 | extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; | |
396 | extern struct kmem_cache *ecryptfs_file_info_cache; | |
397 | extern struct kmem_cache *ecryptfs_dentry_info_cache; | |
398 | extern struct kmem_cache *ecryptfs_inode_info_cache; | |
399 | extern struct kmem_cache *ecryptfs_sb_info_cache; | |
400 | extern struct kmem_cache *ecryptfs_header_cache_0; | |
401 | extern struct kmem_cache *ecryptfs_header_cache_1; | |
402 | extern struct kmem_cache *ecryptfs_header_cache_2; | |
403 | extern struct kmem_cache *ecryptfs_lower_page_cache; | |
404 | ||
405 | int ecryptfs_interpose(struct dentry *hidden_dentry, | |
406 | struct dentry *this_dentry, struct super_block *sb, | |
407 | int flag); | |
408 | int ecryptfs_fill_zeros(struct file *file, loff_t new_length); | |
409 | int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat, | |
410 | const char *name, int length, | |
411 | char **decrypted_name); | |
412 | int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat, | |
413 | const char *name, int length, | |
414 | char **encoded_name); | |
415 | struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); | |
416 | void ecryptfs_copy_attr_atime(struct inode *dest, const struct inode *src); | |
417 | void ecryptfs_copy_attr_all(struct inode *dest, const struct inode *src); | |
418 | void ecryptfs_copy_inode_size(struct inode *dst, const struct inode *src); | |
419 | void ecryptfs_dump_hex(char *data, int bytes); | |
420 | int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, | |
421 | int sg_size); | |
422 | int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); | |
423 | void ecryptfs_rotate_iv(unsigned char *iv); | |
424 | void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); | |
425 | void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); | |
426 | void ecryptfs_destruct_mount_crypt_stat( | |
427 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat); | |
428 | int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); | |
8bba066f MH |
429 | int ecryptfs_crypto_api_algify_cipher_name(char **algified_name, |
430 | char *cipher_name, | |
431 | char *chaining_modifier); | |
237fead6 MH |
432 | int ecryptfs_write_inode_size_to_header(struct file *lower_file, |
433 | struct inode *lower_inode, | |
434 | struct inode *inode); | |
435 | int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, | |
436 | struct file *lower_file, | |
437 | unsigned long lower_page_index, int byte_offset, | |
438 | int region_bytes); | |
439 | int | |
440 | ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, | |
441 | struct file *lower_file, int byte_offset, | |
442 | int region_size); | |
443 | int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, | |
444 | struct file *lower_file); | |
445 | int ecryptfs_do_readpage(struct file *file, struct page *page, | |
446 | pgoff_t lower_page_index); | |
447 | int ecryptfs_grab_and_map_lower_page(struct page **lower_page, | |
448 | char **lower_virt, | |
449 | struct inode *lower_inode, | |
450 | unsigned long lower_page_index); | |
451 | int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, | |
452 | struct inode *lower_inode, | |
453 | struct writeback_control *wbc); | |
454 | int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx); | |
455 | int ecryptfs_decrypt_page(struct file *file, struct page *page); | |
456 | int ecryptfs_write_headers(struct dentry *ecryptfs_dentry, | |
457 | struct file *lower_file); | |
458 | int ecryptfs_write_headers_virt(char *page_virt, | |
459 | struct ecryptfs_crypt_stat *crypt_stat, | |
460 | struct dentry *ecryptfs_dentry); | |
461 | int ecryptfs_read_headers(struct dentry *ecryptfs_dentry, | |
462 | struct file *lower_file); | |
463 | int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); | |
464 | int contains_ecryptfs_marker(char *data); | |
465 | int ecryptfs_read_header_region(char *data, struct dentry *dentry, | |
466 | struct vfsmount *mnt); | |
467 | u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); | |
468 | int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); | |
469 | void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); | |
470 | int ecryptfs_generate_key_packet_set(char *dest_base, | |
471 | struct ecryptfs_crypt_stat *crypt_stat, | |
472 | struct dentry *ecryptfs_dentry, | |
473 | size_t *len, size_t max); | |
474 | int process_request_key_err(long err_code); | |
475 | int | |
476 | ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, | |
477 | unsigned char *src, struct dentry *ecryptfs_dentry); | |
478 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); | |
479 | int | |
8bba066f | 480 | ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name, |
e5d9cbde | 481 | size_t *key_size); |
237fead6 MH |
482 | int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); |
483 | int ecryptfs_inode_set(struct inode *inode, void *lower_inode); | |
484 | void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); | |
7ff1d74f MH |
485 | int ecryptfs_open_lower_file(struct file **lower_file, |
486 | struct dentry *lower_dentry, | |
487 | struct vfsmount *lower_mnt, int flags); | |
488 | int ecryptfs_close_lower_file(struct file *lower_file); | |
237fead6 MH |
489 | |
490 | #endif /* #ifndef ECRYPTFS_KERNEL_H */ |