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