1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28#ifndef ECRYPTFS_KERNEL_H
29#define ECRYPTFS_KERNEL_H
30
31#include <keys/user-type.h>
32#include <keys/encrypted-type.h>
33#include <linux/fs.h>
34#include <linux/fs_stack.h>
35#include <linux/namei.h>
36#include <linux/scatterlist.h>
37#include <linux/hash.h>
38#include <linux/nsproxy.h>
39#include <linux/backing-dev.h>
40#include <linux/ecryptfs.h>
41#include <linux/crypto.h>
42
43#define ECRYPTFS_DEFAULT_IV_BYTES 16
44#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
45#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
46#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
47#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
48#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
49#define ECRYPTFS_DEFAULT_NUM_USERS 4
50#define ECRYPTFS_MAX_NUM_USERS 32768
51#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
52
53void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
54extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
55extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
56
57struct ecryptfs_key_record {
58 unsigned char type;
59 size_t enc_key_size;
60 unsigned char sig[ECRYPTFS_SIG_SIZE];
61 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
62};
63
64struct ecryptfs_auth_tok_list {
65 struct ecryptfs_auth_tok *auth_tok;
66 struct list_head list;
67};
68
69struct ecryptfs_crypt_stat;
70struct ecryptfs_mount_crypt_stat;
71
72struct ecryptfs_page_crypt_context {
73 struct page *page;
74#define ECRYPTFS_PREPARE_COMMIT_MODE 0
75#define ECRYPTFS_WRITEPAGE_MODE 1
76 unsigned int mode;
77 union {
78 struct file *lower_file;
79 struct writeback_control *wbc;
80 } param;
81};
82
83#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
84static inline struct ecryptfs_auth_tok *
85ecryptfs_get_encrypted_key_payload_data(struct key *key)
86{
87 if (key->type == &key_type_encrypted)
88 return (struct ecryptfs_auth_tok *)
89 (&((struct encrypted_key_payload *)key->payload.data)->payload_data);
90 else
91 return NULL;
92}
93
94static inline struct key *ecryptfs_get_encrypted_key(char *sig)
95{
96 return request_key(&key_type_encrypted, sig, NULL);
97}
98
99#else
100static inline struct ecryptfs_auth_tok *
101ecryptfs_get_encrypted_key_payload_data(struct key *key)
102{
103 return NULL;
104}
105
106static inline struct key *ecryptfs_get_encrypted_key(char *sig)
107{
108 return ERR_PTR(-ENOKEY);
109}
110
111#endif
112
113static inline struct ecryptfs_auth_tok *
114ecryptfs_get_key_payload_data(struct key *key)
115{
116 struct ecryptfs_auth_tok *auth_tok;
117
118 auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
119 if (!auth_tok)
120 return (struct ecryptfs_auth_tok *)
121 (((struct user_key_payload *)key->payload.data)->data);
122 else
123 return auth_tok;
124}
125
126#define ECRYPTFS_MAX_KEYSET_SIZE 1024
127#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32
128#define ECRYPTFS_MAX_NUM_ENC_KEYS 64
129#define ECRYPTFS_MAX_IV_BYTES 16
130#define ECRYPTFS_SALT_BYTES 2
131#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
132#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8
133#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
134#define ECRYPTFS_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \
135 + MAGIC_ECRYPTFS_MARKER_SIZE_BYTES)
136#define ECRYPTFS_DEFAULT_CIPHER "aes"
137#define ECRYPTFS_DEFAULT_KEY_BYTES 16
138#define ECRYPTFS_DEFAULT_HASH "md5"
139#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
140#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
141#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
142#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
143#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
144#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
145#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
146#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
147#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46
148
149#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47
150
151#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48
152
153#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49
154
155#define ECRYPTFS_MIN_PKT_LEN_SIZE 1
156#define ECRYPTFS_MAX_PKT_LEN_SIZE 2
157
158
159
160
161
162#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
163#define ECRYPTFS_NON_NULL 0x42
164#define MD5_DIGEST_SIZE 16
165#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
166#define ECRYPTFS_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \
167 + ECRYPTFS_SIG_SIZE + 1 + 1)
168#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \
169 + ECRYPTFS_SIG_SIZE + 1 + 1)
170#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
171#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
172#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
173#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
174#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
175
176#ifdef CONFIG_ECRYPT_FS_MESSAGING
177# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \
178 | ECRYPTFS_VERSIONING_PUBKEY)
179#else
180# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0
181#endif
182
183#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
184 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
185 | ECRYPTFS_VERSIONING_XATTR \
186 | ECRYPTFS_VERSIONING_MULTKEY \
187 | ECRYPTFS_VERSIONING_MASK_MESSAGING \
188 | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
189struct ecryptfs_key_sig {
190 struct list_head crypt_stat_list;
191 char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
192};
193
194struct ecryptfs_filename {
195 struct list_head crypt_stat_list;
196#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
197 u32 flags;
198 u32 seq_no;
199 char *filename;
200 char *encrypted_filename;
201 size_t filename_size;
202 size_t encrypted_filename_size;
203 char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
204 char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
205};
206
207
208
209
210
211
212struct ecryptfs_crypt_stat {
213#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
214#define ECRYPTFS_POLICY_APPLIED 0x00000002
215#define ECRYPTFS_ENCRYPTED 0x00000004
216#define ECRYPTFS_SECURITY_WARNING 0x00000008
217#define ECRYPTFS_ENABLE_HMAC 0x00000010
218#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020
219#define ECRYPTFS_KEY_VALID 0x00000040
220#define ECRYPTFS_METADATA_IN_XATTR 0x00000080
221#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100
222#define ECRYPTFS_KEY_SET 0x00000200
223#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400
224#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800
225#define ECRYPTFS_ENCFN_USE_FEK 0x00001000
226#define ECRYPTFS_UNLINK_SIGS 0x00002000
227#define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000
228 u32 flags;
229 unsigned int file_version;
230 size_t iv_bytes;
231 size_t metadata_size;
232 size_t extent_size;
233 size_t key_size;
234 size_t extent_shift;
235 unsigned int extent_mask;
236 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
237 struct crypto_ablkcipher *tfm;
238 struct crypto_hash *hash_tfm;
239
240 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
241 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
242 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
243 struct list_head keysig_list;
244 struct mutex keysig_list_mutex;
245 struct mutex cs_tfm_mutex;
246 struct mutex cs_hash_tfm_mutex;
247 struct mutex cs_mutex;
248};
249
250
251struct ecryptfs_inode_info {
252 struct inode vfs_inode;
253 struct inode *wii_inode;
254 struct mutex lower_file_mutex;
255 atomic_t lower_file_count;
256 struct file *lower_file;
257 struct ecryptfs_crypt_stat crypt_stat;
258};
259
260
261
262struct ecryptfs_dentry_info {
263 struct path lower_path;
264 struct ecryptfs_crypt_stat *crypt_stat;
265};
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286struct ecryptfs_global_auth_tok {
287#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
288#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
289 u32 flags;
290 struct list_head mount_crypt_stat_list;
291 struct key *global_auth_tok_key;
292 unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
293};
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309struct ecryptfs_key_tfm {
310 struct crypto_blkcipher *key_tfm;
311 size_t key_size;
312 struct mutex key_tfm_mutex;
313 struct list_head key_tfm_list;
314 unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
315};
316
317extern struct mutex key_tfm_list_mutex;
318
319
320
321
322
323
324
325struct ecryptfs_mount_crypt_stat {
326
327#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
328#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
329#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
330#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
331#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
332#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
333#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
334#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
335 u32 flags;
336 struct list_head global_auth_tok_list;
337 struct mutex global_auth_tok_list_mutex;
338 size_t global_default_cipher_key_size;
339 size_t global_default_fn_cipher_key_bytes;
340 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
341 + 1];
342 unsigned char global_default_fn_cipher_name[
343 ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
344 char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
345};
346
347
348struct ecryptfs_sb_info {
349 struct super_block *wsi_sb;
350 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
351 struct backing_dev_info bdi;
352};
353
354
355struct ecryptfs_file_info {
356 struct file *wfi_file;
357 struct ecryptfs_crypt_stat *crypt_stat;
358};
359
360
361struct ecryptfs_auth_tok_list_item {
362 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
363 struct list_head list;
364 struct ecryptfs_auth_tok auth_tok;
365};
366
367struct ecryptfs_message {
368
369
370
371 u32 index;
372 u32 data_len;
373 u8 data[];
374};
375
376struct ecryptfs_msg_ctx {
377#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
378#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
379#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
380#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
381 u8 state;
382#define ECRYPTFS_MSG_HELO 100
383#define ECRYPTFS_MSG_QUIT 101
384#define ECRYPTFS_MSG_REQUEST 102
385#define ECRYPTFS_MSG_RESPONSE 103
386 u8 type;
387 u32 index;
388
389
390
391
392
393 u32 counter;
394 size_t msg_size;
395 struct ecryptfs_message *msg;
396 struct task_struct *task;
397 struct list_head node;
398 struct list_head daemon_out_list;
399 struct mutex mux;
400};
401
402struct ecryptfs_daemon {
403#define ECRYPTFS_DAEMON_IN_READ 0x00000001
404#define ECRYPTFS_DAEMON_IN_POLL 0x00000002
405#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
406#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
407 u32 flags;
408 u32 num_queued_msg_ctx;
409 struct file *file;
410 struct mutex mux;
411 struct list_head msg_ctx_out_queue;
412 wait_queue_head_t wait;
413 struct hlist_node euid_chain;
414};
415
416#ifdef CONFIG_ECRYPT_FS_MESSAGING
417extern struct mutex ecryptfs_daemon_hash_mux;
418#endif
419
420static inline size_t
421ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
422{
423 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
424 return 0;
425 return crypt_stat->metadata_size;
426}
427
428static inline struct ecryptfs_file_info *
429ecryptfs_file_to_private(struct file *file)
430{
431 return file->private_data;
432}
433
434static inline void
435ecryptfs_set_file_private(struct file *file,
436 struct ecryptfs_file_info *file_info)
437{
438 file->private_data = file_info;
439}
440
441static inline struct file *ecryptfs_file_to_lower(struct file *file)
442{
443 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
444}
445
446static inline void
447ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
448{
449 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
450 lower_file;
451}
452
453static inline struct ecryptfs_inode_info *
454ecryptfs_inode_to_private(struct inode *inode)
455{
456 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
457}
458
459static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
460{
461 return ecryptfs_inode_to_private(inode)->wii_inode;
462}
463
464static inline void
465ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
466{
467 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
468}
469
470static inline struct ecryptfs_sb_info *
471ecryptfs_superblock_to_private(struct super_block *sb)
472{
473 return (struct ecryptfs_sb_info *)sb->s_fs_info;
474}
475
476static inline void
477ecryptfs_set_superblock_private(struct super_block *sb,
478 struct ecryptfs_sb_info *sb_info)
479{
480 sb->s_fs_info = sb_info;
481}
482
483static inline struct super_block *
484ecryptfs_superblock_to_lower(struct super_block *sb)
485{
486 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
487}
488
489static inline void
490ecryptfs_set_superblock_lower(struct super_block *sb,
491 struct super_block *lower_sb)
492{
493 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
494}
495
496static inline struct ecryptfs_dentry_info *
497ecryptfs_dentry_to_private(struct dentry *dentry)
498{
499 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
500}
501
502static inline void
503ecryptfs_set_dentry_private(struct dentry *dentry,
504 struct ecryptfs_dentry_info *dentry_info)
505{
506 dentry->d_fsdata = dentry_info;
507}
508
509static inline struct dentry *
510ecryptfs_dentry_to_lower(struct dentry *dentry)
511{
512 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
513}
514
515static inline void
516ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
517{
518 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
519 lower_dentry;
520}
521
522static inline struct vfsmount *
523ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
524{
525 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
526}
527
528static inline struct path *
529ecryptfs_dentry_to_lower_path(struct dentry *dentry)
530{
531 return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path;
532}
533
534static inline void
535ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
536{
537 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
538 lower_mnt;
539}
540
541#define ecryptfs_printk(type, fmt, arg...) \
542 __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
543__printf(1, 2)
544void __ecryptfs_printk(const char *fmt, ...);
545
546extern const struct file_operations ecryptfs_main_fops;
547extern const struct file_operations ecryptfs_dir_fops;
548extern const struct inode_operations ecryptfs_main_iops;
549extern const struct inode_operations ecryptfs_dir_iops;
550extern const struct inode_operations ecryptfs_symlink_iops;
551extern const struct super_operations ecryptfs_sops;
552extern const struct dentry_operations ecryptfs_dops;
553extern const struct address_space_operations ecryptfs_aops;
554extern int ecryptfs_verbosity;
555extern unsigned int ecryptfs_message_buf_len;
556extern signed long ecryptfs_message_wait_timeout;
557extern unsigned int ecryptfs_number_of_users;
558
559extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
560extern struct kmem_cache *ecryptfs_file_info_cache;
561extern struct kmem_cache *ecryptfs_dentry_info_cache;
562extern struct kmem_cache *ecryptfs_inode_info_cache;
563extern struct kmem_cache *ecryptfs_sb_info_cache;
564extern struct kmem_cache *ecryptfs_header_cache;
565extern struct kmem_cache *ecryptfs_xattr_cache;
566extern struct kmem_cache *ecryptfs_key_record_cache;
567extern struct kmem_cache *ecryptfs_key_sig_cache;
568extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
569extern struct kmem_cache *ecryptfs_key_tfm_cache;
570
571struct inode *ecryptfs_get_inode(struct inode *lower_inode,
572 struct super_block *sb);
573void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);
574int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
575 struct inode *ecryptfs_inode);
576int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
577 size_t *decrypted_name_size,
578 struct dentry *ecryptfs_dentry,
579 const char *name, size_t name_size);
580int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
581int ecryptfs_encrypt_and_encode_filename(
582 char **encoded_name,
583 size_t *encoded_name_size,
584 struct ecryptfs_crypt_stat *crypt_stat,
585 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
586 const char *name, size_t name_size);
587struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
588void ecryptfs_dump_hex(char *data, int bytes);
589int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
590 int sg_size);
591int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
592void ecryptfs_rotate_iv(unsigned char *iv);
593void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
594void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
595void ecryptfs_destroy_mount_crypt_stat(
596 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
597int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
598int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
599int ecryptfs_encrypt_page(struct page *page);
600int ecryptfs_decrypt_page(struct page *page);
601int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
602 struct inode *ecryptfs_inode);
603int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
604int ecryptfs_new_file_context(struct inode *ecryptfs_inode);
605void ecryptfs_write_crypt_stat_flags(char *page_virt,
606 struct ecryptfs_crypt_stat *crypt_stat,
607 size_t *written);
608int ecryptfs_read_and_validate_header_region(struct inode *inode);
609int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
610 struct inode *inode);
611u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
612int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
613void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
614int ecryptfs_generate_key_packet_set(char *dest_base,
615 struct ecryptfs_crypt_stat *crypt_stat,
616 struct dentry *ecryptfs_dentry,
617 size_t *len, size_t max);
618int
619ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
620 unsigned char *src, struct dentry *ecryptfs_dentry);
621int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
622ssize_t
623ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
624 void *value, size_t size);
625int
626ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
627 size_t size, int flags);
628int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
629#ifdef CONFIG_ECRYPT_FS_MESSAGING
630int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
631 struct ecryptfs_message *msg, u32 seq);
632int ecryptfs_send_message(char *data, int data_len,
633 struct ecryptfs_msg_ctx **msg_ctx);
634int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
635 struct ecryptfs_message **emsg);
636int ecryptfs_init_messaging(void);
637void ecryptfs_release_messaging(void);
638#else
639static inline int ecryptfs_init_messaging(void)
640{
641 return 0;
642}
643static inline void ecryptfs_release_messaging(void)
644{ }
645static inline int ecryptfs_send_message(char *data, int data_len,
646 struct ecryptfs_msg_ctx **msg_ctx)
647{
648 return -ENOTCONN;
649}
650static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
651 struct ecryptfs_message **emsg)
652{
653 return -ENOMSG;
654}
655#endif
656
657void
658ecryptfs_write_header_metadata(char *virt,
659 struct ecryptfs_crypt_stat *crypt_stat,
660 size_t *written);
661int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
662int
663ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
664 char *sig, u32 global_auth_tok_flags);
665int ecryptfs_get_global_auth_tok_for_sig(
666 struct ecryptfs_global_auth_tok **global_auth_tok,
667 struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
668int
669ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
670 size_t key_size);
671int ecryptfs_init_crypto(void);
672int ecryptfs_destroy_crypto(void);
673int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
674int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm,
675 struct mutex **tfm_mutex,
676 char *cipher_name);
677int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
678 struct ecryptfs_auth_tok **auth_tok,
679 char *sig);
680int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
681 loff_t offset, size_t size);
682int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
683 struct page *page_for_lower,
684 size_t offset_in_page, size_t size);
685int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
686int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
687 struct inode *ecryptfs_inode);
688int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
689 pgoff_t page_index,
690 size_t offset_in_page, size_t size,
691 struct inode *ecryptfs_inode);
692struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
693int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
694 size_t *length_size);
695int ecryptfs_write_packet_length(char *dest, size_t size,
696 size_t *packet_size_length);
697#ifdef CONFIG_ECRYPT_FS_MESSAGING
698int ecryptfs_init_ecryptfs_miscdev(void);
699void ecryptfs_destroy_ecryptfs_miscdev(void);
700int ecryptfs_send_miscdev(char *data, size_t data_size,
701 struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
702 u16 msg_flags, struct ecryptfs_daemon *daemon);
703void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
704int
705ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file);
706int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
707int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
708#endif
709int ecryptfs_init_kthread(void);
710void ecryptfs_destroy_kthread(void);
711int ecryptfs_privileged_open(struct file **lower_file,
712 struct dentry *lower_dentry,
713 struct vfsmount *lower_mnt,
714 const struct cred *cred);
715int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode);
716void ecryptfs_put_lower_file(struct inode *inode);
717int
718ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
719 size_t *packet_size,
720 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
721 char *filename, size_t filename_size);
722int
723ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
724 size_t *packet_size,
725 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
726 char *data, size_t max_packet_size);
727int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
728 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
729int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
730 loff_t offset);
731
732#endif
733