2 * eCryptfs: Linux filesystem encryption layer
5 * Copyright (C) 1997-2003 Erez Zadok
6 * Copyright (C) 2001-2003 Stony Brook University
7 * Copyright (C) 2004-2008 International Business Machines Corp.
8 * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
9 * Trevor S. Highland <trevor.highland@gmail.com>
10 * Tyler Hicks <tyhicks@ou.edu>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #ifndef ECRYPTFS_KERNEL_H
29 #define ECRYPTFS_KERNEL_H
31 #include <keys/user-type.h>
32 #include <keys/encrypted-type.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>
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"
52 void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
53 extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
54 extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
56 struct ecryptfs_key_record {
59 unsigned char sig[ECRYPTFS_SIG_SIZE];
60 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
63 struct ecryptfs_auth_tok_list {
64 struct ecryptfs_auth_tok *auth_tok;
65 struct list_head list;
68 struct ecryptfs_crypt_stat;
69 struct ecryptfs_mount_crypt_stat;
71 struct ecryptfs_page_crypt_context {
73 #define ECRYPTFS_PREPARE_COMMIT_MODE 0
74 #define ECRYPTFS_WRITEPAGE_MODE 1
77 struct file *lower_file;
78 struct writeback_control *wbc;
82 #if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
83 static inline struct ecryptfs_auth_tok *
84 ecryptfs_get_encrypted_key_payload_data(struct key *key)
86 if (key->type == &key_type_encrypted)
87 return (struct ecryptfs_auth_tok *)
88 (&((struct encrypted_key_payload *)key->payload.data)->payload_data);
93 static inline struct key *ecryptfs_get_encrypted_key(char *sig)
95 return request_key(&key_type_encrypted, sig, NULL);
99 static inline struct ecryptfs_auth_tok *
100 ecryptfs_get_encrypted_key_payload_data(struct key *key)
105 static inline struct key *ecryptfs_get_encrypted_key(char *sig)
107 return ERR_PTR(-ENOKEY);
110 #endif /* CONFIG_ENCRYPTED_KEYS */
112 static inline struct ecryptfs_auth_tok *
113 ecryptfs_get_key_payload_data(struct key *key)
115 struct ecryptfs_auth_tok *auth_tok;
117 auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
119 return (struct ecryptfs_auth_tok *)
120 (((struct user_key_payload *)key->payload.data)->data);
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 /* 128 bits */
129 #define ECRYPTFS_SALT_BYTES 2
130 #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
131 #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */
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 /* FNEK-encrypted filename
148 #define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in
150 #define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as
152 #define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as
154 /* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >=
155 * ECRYPTFS_MAX_IV_BYTES */
156 #define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
157 #define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */
158 #define MD5_DIGEST_SIZE 16
159 #define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
160 #define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
161 #define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
162 #define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
163 #define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
164 #define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
166 struct ecryptfs_key_sig {
167 struct list_head crypt_stat_list;
168 char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
171 struct ecryptfs_filename {
172 struct list_head crypt_stat_list;
173 #define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
177 char *encrypted_filename;
178 size_t filename_size;
179 size_t encrypted_filename_size;
180 char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
181 char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
185 * This is the primary struct associated with each encrypted file.
187 * TODO: cache align/pack?
189 struct ecryptfs_crypt_stat {
190 #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
191 #define ECRYPTFS_POLICY_APPLIED 0x00000002
192 #define ECRYPTFS_ENCRYPTED 0x00000004
193 #define ECRYPTFS_SECURITY_WARNING 0x00000008
194 #define ECRYPTFS_ENABLE_HMAC 0x00000010
195 #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020
196 #define ECRYPTFS_KEY_VALID 0x00000040
197 #define ECRYPTFS_METADATA_IN_XATTR 0x00000080
198 #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100
199 #define ECRYPTFS_KEY_SET 0x00000200
200 #define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400
201 #define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800
202 #define ECRYPTFS_ENCFN_USE_FEK 0x00001000
203 #define ECRYPTFS_UNLINK_SIGS 0x00002000
204 #define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000
206 unsigned int file_version;
208 size_t metadata_size;
209 size_t extent_size; /* Data extent size; default is 4096 */
212 unsigned int extent_mask;
213 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
214 struct crypto_blkcipher *tfm;
215 struct crypto_hash *hash_tfm; /* Crypto context for generating
216 * the initialization vectors */
217 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
218 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
219 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
220 struct list_head keysig_list;
221 struct mutex keysig_list_mutex;
222 struct mutex cs_tfm_mutex;
223 struct mutex cs_hash_tfm_mutex;
224 struct mutex cs_mutex;
227 /* inode private data. */
228 struct ecryptfs_inode_info {
229 struct inode vfs_inode;
230 struct inode *wii_inode;
231 struct mutex lower_file_mutex;
232 atomic_t lower_file_count;
233 struct file *lower_file;
234 struct ecryptfs_crypt_stat crypt_stat;
237 /* dentry private data. Each dentry must keep track of a lower
239 struct ecryptfs_dentry_info {
240 struct path lower_path;
241 struct ecryptfs_crypt_stat *crypt_stat;
245 * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint
246 * @flags: Status flags
247 * @mount_crypt_stat_list: These auth_toks hang off the mount-wide
248 * cryptographic context. Every time a new
249 * inode comes into existence, eCryptfs copies
250 * the auth_toks on that list to the set of
251 * auth_toks on the inode's crypt_stat
252 * @global_auth_tok_key: The key from the user's keyring for the sig
253 * @global_auth_tok: The key contents
254 * @sig: The key identifier
256 * ecryptfs_global_auth_tok structs refer to authentication token keys
257 * in the user keyring that apply to newly created files. A list of
258 * these objects hangs off of the mount_crypt_stat struct for any
259 * given eCryptfs mount. This struct maintains a reference to both the
260 * key contents and the key itself so that the key can be put on
263 struct ecryptfs_global_auth_tok {
264 #define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
265 #define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
267 struct list_head mount_crypt_stat_list;
268 struct key *global_auth_tok_key;
269 unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
273 * ecryptfs_key_tfm - Persistent key tfm
274 * @key_tfm: crypto API handle to the key
275 * @key_size: Key size in bytes
276 * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is
277 * using the persistent TFM at any point in time
278 * @key_tfm_list: Handle to hang this off the module-wide TFM list
279 * @cipher_name: String name for the cipher for this TFM
281 * Typically, eCryptfs will use the same ciphers repeatedly throughout
282 * the course of its operations. In order to avoid unnecessarily
283 * destroying and initializing the same cipher repeatedly, eCryptfs
284 * keeps a list of crypto API contexts around to use when needed.
286 struct ecryptfs_key_tfm {
287 struct crypto_blkcipher *key_tfm;
289 struct mutex key_tfm_mutex;
290 struct list_head key_tfm_list;
291 unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
294 extern struct mutex key_tfm_list_mutex;
297 * This struct is to enable a mount-wide passphrase/salt combo. This
298 * is more or less a stopgap to provide similar functionality to other
299 * crypto filesystems like EncFS or CFS until full policy support is
300 * implemented in eCryptfs.
302 struct ecryptfs_mount_crypt_stat {
303 /* Pointers to memory we do not own, do not free these */
304 #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
305 #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
306 #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
307 #define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
308 #define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
309 #define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
310 #define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
311 #define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
313 struct list_head global_auth_tok_list;
314 struct mutex global_auth_tok_list_mutex;
315 size_t global_default_cipher_key_size;
316 size_t global_default_fn_cipher_key_bytes;
317 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
319 unsigned char global_default_fn_cipher_name[
320 ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
321 char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
324 /* superblock private data. */
325 struct ecryptfs_sb_info {
326 struct super_block *wsi_sb;
327 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
328 struct backing_dev_info bdi;
331 /* file private data. */
332 struct ecryptfs_file_info {
333 struct file *wfi_file;
334 struct ecryptfs_crypt_stat *crypt_stat;
337 /* auth_tok <=> encrypted_session_key mappings */
338 struct ecryptfs_auth_tok_list_item {
339 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
340 struct list_head list;
341 struct ecryptfs_auth_tok auth_tok;
344 struct ecryptfs_message {
345 /* Can never be greater than ecryptfs_message_buf_len */
346 /* Used to find the parent msg_ctx */
347 /* Inherits from msg_ctx->index */
353 struct ecryptfs_msg_ctx {
354 #define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
355 #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
356 #define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
357 #define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
359 #define ECRYPTFS_MSG_HELO 100
360 #define ECRYPTFS_MSG_QUIT 101
361 #define ECRYPTFS_MSG_REQUEST 102
362 #define ECRYPTFS_MSG_RESPONSE 103
365 /* Counter converts to a sequence number. Each message sent
366 * out for which we expect a response has an associated
367 * sequence number. The response must have the same sequence
368 * number as the counter for the msg_stc for the message to be
372 struct ecryptfs_message *msg;
373 struct task_struct *task;
374 struct list_head node;
375 struct list_head daemon_out_list;
379 struct ecryptfs_daemon;
381 struct ecryptfs_daemon {
382 #define ECRYPTFS_DAEMON_IN_READ 0x00000001
383 #define ECRYPTFS_DAEMON_IN_POLL 0x00000002
384 #define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
385 #define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
387 u32 num_queued_msg_ctx;
390 struct user_namespace *user_ns;
391 struct task_struct *task;
393 struct list_head msg_ctx_out_queue;
394 wait_queue_head_t wait;
395 struct hlist_node euid_chain;
398 extern struct mutex ecryptfs_daemon_hash_mux;
401 ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
403 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
405 return crypt_stat->metadata_size;
408 static inline struct ecryptfs_file_info *
409 ecryptfs_file_to_private(struct file *file)
411 return file->private_data;
415 ecryptfs_set_file_private(struct file *file,
416 struct ecryptfs_file_info *file_info)
418 file->private_data = file_info;
421 static inline struct file *ecryptfs_file_to_lower(struct file *file)
423 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
427 ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
429 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
433 static inline struct ecryptfs_inode_info *
434 ecryptfs_inode_to_private(struct inode *inode)
436 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
439 static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
441 return ecryptfs_inode_to_private(inode)->wii_inode;
445 ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
447 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
450 static inline struct ecryptfs_sb_info *
451 ecryptfs_superblock_to_private(struct super_block *sb)
453 return (struct ecryptfs_sb_info *)sb->s_fs_info;
457 ecryptfs_set_superblock_private(struct super_block *sb,
458 struct ecryptfs_sb_info *sb_info)
460 sb->s_fs_info = sb_info;
463 static inline struct super_block *
464 ecryptfs_superblock_to_lower(struct super_block *sb)
466 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
470 ecryptfs_set_superblock_lower(struct super_block *sb,
471 struct super_block *lower_sb)
473 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
476 static inline struct ecryptfs_dentry_info *
477 ecryptfs_dentry_to_private(struct dentry *dentry)
479 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
483 ecryptfs_set_dentry_private(struct dentry *dentry,
484 struct ecryptfs_dentry_info *dentry_info)
486 dentry->d_fsdata = dentry_info;
489 static inline struct dentry *
490 ecryptfs_dentry_to_lower(struct dentry *dentry)
492 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
496 ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
498 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
502 static inline struct vfsmount *
503 ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
505 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
509 ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
511 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
515 #define ecryptfs_printk(type, fmt, arg...) \
516 __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
518 void __ecryptfs_printk(const char *fmt, ...);
520 extern const struct file_operations ecryptfs_main_fops;
521 extern const struct file_operations ecryptfs_dir_fops;
522 extern const struct inode_operations ecryptfs_main_iops;
523 extern const struct inode_operations ecryptfs_dir_iops;
524 extern const struct inode_operations ecryptfs_symlink_iops;
525 extern const struct super_operations ecryptfs_sops;
526 extern const struct dentry_operations ecryptfs_dops;
527 extern const struct address_space_operations ecryptfs_aops;
528 extern int ecryptfs_verbosity;
529 extern unsigned int ecryptfs_message_buf_len;
530 extern signed long ecryptfs_message_wait_timeout;
531 extern unsigned int ecryptfs_number_of_users;
533 extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
534 extern struct kmem_cache *ecryptfs_file_info_cache;
535 extern struct kmem_cache *ecryptfs_dentry_info_cache;
536 extern struct kmem_cache *ecryptfs_inode_info_cache;
537 extern struct kmem_cache *ecryptfs_sb_info_cache;
538 extern struct kmem_cache *ecryptfs_header_cache;
539 extern struct kmem_cache *ecryptfs_xattr_cache;
540 extern struct kmem_cache *ecryptfs_key_record_cache;
541 extern struct kmem_cache *ecryptfs_key_sig_cache;
542 extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
543 extern struct kmem_cache *ecryptfs_key_tfm_cache;
544 extern struct kmem_cache *ecryptfs_open_req_cache;
546 struct ecryptfs_open_req {
547 #define ECRYPTFS_REQ_PROCESSED 0x00000001
548 #define ECRYPTFS_REQ_DROPPED 0x00000002
549 #define ECRYPTFS_REQ_ZOMBIE 0x00000004
551 struct file **lower_file;
552 struct dentry *lower_dentry;
553 struct vfsmount *lower_mnt;
554 wait_queue_head_t wait;
556 struct list_head kthread_ctl_list;
559 struct inode *ecryptfs_get_inode(struct inode *lower_inode,
560 struct super_block *sb);
561 void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);
562 int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
563 size_t *decrypted_name_size,
564 struct dentry *ecryptfs_dentry,
565 const char *name, size_t name_size);
566 int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
567 int ecryptfs_encrypt_and_encode_filename(
569 size_t *encoded_name_size,
570 struct ecryptfs_crypt_stat *crypt_stat,
571 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
572 const char *name, size_t name_size);
573 struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
574 void ecryptfs_dump_hex(char *data, int bytes);
575 int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
577 int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
578 void ecryptfs_rotate_iv(unsigned char *iv);
579 void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
580 void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
581 void ecryptfs_destroy_mount_crypt_stat(
582 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
583 int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
584 int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
585 int ecryptfs_encrypt_page(struct page *page);
586 int ecryptfs_decrypt_page(struct page *page);
587 int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry);
588 int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
589 int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
590 void ecryptfs_write_crypt_stat_flags(char *page_virt,
591 struct ecryptfs_crypt_stat *crypt_stat,
593 int ecryptfs_read_and_validate_header_region(struct inode *inode);
594 int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
595 struct inode *inode);
596 u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
597 int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
598 void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
599 int ecryptfs_generate_key_packet_set(char *dest_base,
600 struct ecryptfs_crypt_stat *crypt_stat,
601 struct dentry *ecryptfs_dentry,
602 size_t *len, size_t max);
604 ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
605 unsigned char *src, struct dentry *ecryptfs_dentry);
606 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
608 ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
609 void *value, size_t size);
611 ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
612 size_t size, int flags);
613 int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
614 int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns,
616 int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns,
618 int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
619 struct user_namespace *user_ns, struct pid *pid,
621 int ecryptfs_send_message(char *data, int data_len,
622 struct ecryptfs_msg_ctx **msg_ctx);
623 int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
624 struct ecryptfs_message **emsg);
625 int ecryptfs_init_messaging(void);
626 void ecryptfs_release_messaging(void);
629 ecryptfs_write_header_metadata(char *virt,
630 struct ecryptfs_crypt_stat *crypt_stat,
632 int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
634 ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
635 char *sig, u32 global_auth_tok_flags);
636 int ecryptfs_get_global_auth_tok_for_sig(
637 struct ecryptfs_global_auth_tok **global_auth_tok,
638 struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
640 ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
642 int ecryptfs_init_crypto(void);
643 int ecryptfs_destroy_crypto(void);
644 int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
645 int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm,
646 struct mutex **tfm_mutex,
648 int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
649 struct ecryptfs_auth_tok **auth_tok,
651 int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
652 loff_t offset, size_t size);
653 int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
654 struct page *page_for_lower,
655 size_t offset_in_page, size_t size);
656 int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
657 int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
658 struct inode *ecryptfs_inode);
659 int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
661 size_t offset_in_page, size_t size,
662 struct inode *ecryptfs_inode);
663 struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
664 int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
665 int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid,
666 struct user_namespace *user_ns);
667 int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
668 size_t *length_size);
669 int ecryptfs_write_packet_length(char *dest, size_t size,
670 size_t *packet_size_length);
671 int ecryptfs_init_ecryptfs_miscdev(void);
672 void ecryptfs_destroy_ecryptfs_miscdev(void);
673 int ecryptfs_send_miscdev(char *data, size_t data_size,
674 struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
675 u16 msg_flags, struct ecryptfs_daemon *daemon);
676 void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
678 ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid,
679 struct user_namespace *user_ns, struct pid *pid);
680 int ecryptfs_init_kthread(void);
681 void ecryptfs_destroy_kthread(void);
682 int ecryptfs_privileged_open(struct file **lower_file,
683 struct dentry *lower_dentry,
684 struct vfsmount *lower_mnt,
685 const struct cred *cred);
686 int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode);
687 void ecryptfs_put_lower_file(struct inode *inode);
689 ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
691 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
692 char *filename, size_t filename_size);
694 ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
696 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
697 char *data, size_t max_packet_size);
698 int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
701 #endif /* #ifndef ECRYPTFS_KERNEL_H */