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28#ifndef ECRYPTFS_KERNEL_H
29#define ECRYPTFS_KERNEL_H
30
31#include <keys/user-type.h>
32#include <linux/fs.h>
33#include <linux/fs_stack.h>
34#include <linux/namei.h>
35#include <linux/scatterlist.h>
36#include <linux/hash.h>
37#include <linux/nsproxy.h>
38#include <linux/backing-dev.h>
39
40
41#define ECRYPTFS_VERSION_MAJOR 0x00
42#define ECRYPTFS_VERSION_MINOR 0x04
43#define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03
44
45
46
47
48#define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001
49#define ECRYPTFS_VERSIONING_PUBKEY 0x00000002
50#define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004
51#define ECRYPTFS_VERSIONING_POLICY 0x00000008
52#define ECRYPTFS_VERSIONING_XATTR 0x00000010
53#define ECRYPTFS_VERSIONING_MULTKEY 0x00000020
54#define ECRYPTFS_VERSIONING_DEVMISC 0x00000040
55#define ECRYPTFS_VERSIONING_HMAC 0x00000080
56#define ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION 0x00000100
57#define ECRYPTFS_VERSIONING_GCM 0x00000200
58#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
59 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
60 | ECRYPTFS_VERSIONING_PUBKEY \
61 | ECRYPTFS_VERSIONING_XATTR \
62 | ECRYPTFS_VERSIONING_MULTKEY \
63 | ECRYPTFS_VERSIONING_DEVMISC \
64 | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
65#define ECRYPTFS_MAX_PASSWORD_LENGTH 64
66#define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH
67#define ECRYPTFS_SALT_SIZE 8
68#define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2)
69
70
71
72#define ECRYPTFS_SIG_SIZE 8
73#define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2)
74#define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX
75#define ECRYPTFS_MAX_KEY_BYTES 64
76#define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512
77#define ECRYPTFS_DEFAULT_IV_BYTES 16
78#define ECRYPTFS_FILE_VERSION 0x03
79#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
80#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
81#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
82#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
83#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
84#define ECRYPTFS_MAX_PKI_NAME_BYTES 16
85#define ECRYPTFS_DEFAULT_NUM_USERS 4
86#define ECRYPTFS_MAX_NUM_USERS 32768
87#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
88
89#define RFC2440_CIPHER_DES3_EDE 0x02
90#define RFC2440_CIPHER_CAST_5 0x03
91#define RFC2440_CIPHER_BLOWFISH 0x04
92#define RFC2440_CIPHER_AES_128 0x07
93#define RFC2440_CIPHER_AES_192 0x08
94#define RFC2440_CIPHER_AES_256 0x09
95#define RFC2440_CIPHER_TWOFISH 0x0a
96#define RFC2440_CIPHER_CAST_6 0x0b
97
98#define RFC2440_CIPHER_RSA 0x01
99
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106
107struct ecryptfs_session_key {
108#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001
109#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002
110#define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004
111#define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008
112 u32 flags;
113 u32 encrypted_key_size;
114 u32 decrypted_key_size;
115 u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
116 u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES];
117};
118
119struct ecryptfs_password {
120 u32 password_bytes;
121 s32 hash_algo;
122 u32 hash_iterations;
123 u32 session_key_encryption_key_bytes;
124#define ECRYPTFS_PERSISTENT_PASSWORD 0x01
125#define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02
126 u32 flags;
127
128 u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES];
129 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
130
131 u8 salt[ECRYPTFS_SALT_SIZE];
132};
133
134enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY};
135
136struct ecryptfs_private_key {
137 u32 key_size;
138 u32 data_len;
139 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
140 char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1];
141 u8 data[];
142};
143
144
145struct ecryptfs_auth_tok {
146 u16 version;
147 u16 token_type;
148#define ECRYPTFS_ENCRYPT_ONLY 0x00000001
149 u32 flags;
150 struct ecryptfs_session_key session_key;
151 u8 reserved[32];
152 union {
153 struct ecryptfs_password password;
154 struct ecryptfs_private_key private_key;
155 } token;
156} __attribute__ ((packed));
157
158void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
159extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
160extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
161
162struct ecryptfs_key_record {
163 unsigned char type;
164 size_t enc_key_size;
165 unsigned char sig[ECRYPTFS_SIG_SIZE];
166 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
167};
168
169struct ecryptfs_auth_tok_list {
170 struct ecryptfs_auth_tok *auth_tok;
171 struct list_head list;
172};
173
174struct ecryptfs_crypt_stat;
175struct ecryptfs_mount_crypt_stat;
176
177struct ecryptfs_page_crypt_context {
178 struct page *page;
179#define ECRYPTFS_PREPARE_COMMIT_MODE 0
180#define ECRYPTFS_WRITEPAGE_MODE 1
181 unsigned int mode;
182 union {
183 struct file *lower_file;
184 struct writeback_control *wbc;
185 } param;
186};
187
188static inline struct ecryptfs_auth_tok *
189ecryptfs_get_key_payload_data(struct key *key)
190{
191 return (struct ecryptfs_auth_tok *)
192 (((struct user_key_payload*)key->payload.data)->data);
193}
194
195#define ECRYPTFS_MAX_KEYSET_SIZE 1024
196#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32
197#define ECRYPTFS_MAX_NUM_ENC_KEYS 64
198#define ECRYPTFS_MAX_IV_BYTES 16
199#define ECRYPTFS_SALT_BYTES 2
200#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
201#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8
202#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
203#define ECRYPTFS_DEFAULT_CIPHER "aes"
204#define ECRYPTFS_DEFAULT_KEY_BYTES 16
205#define ECRYPTFS_DEFAULT_HASH "md5"
206#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
207#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
208#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
209#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
210#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
211#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
212#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
213#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
214#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46
215
216#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47
217
218#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48
219
220#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49
221
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223
224#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
225#define ECRYPTFS_NON_NULL 0x42
226#define MD5_DIGEST_SIZE 16
227#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
228#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
229#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
230#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
231#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
232#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
233
234struct ecryptfs_key_sig {
235 struct list_head crypt_stat_list;
236 char keysig[ECRYPTFS_SIG_SIZE_HEX];
237};
238
239struct ecryptfs_filename {
240 struct list_head crypt_stat_list;
241#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
242 u32 flags;
243 u32 seq_no;
244 char *filename;
245 char *encrypted_filename;
246 size_t filename_size;
247 size_t encrypted_filename_size;
248 char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
249 char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
250};
251
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256
257struct ecryptfs_crypt_stat {
258#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
259#define ECRYPTFS_POLICY_APPLIED 0x00000002
260#define ECRYPTFS_NEW_FILE 0x00000004
261#define ECRYPTFS_ENCRYPTED 0x00000008
262#define ECRYPTFS_SECURITY_WARNING 0x00000010
263#define ECRYPTFS_ENABLE_HMAC 0x00000020
264#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040
265#define ECRYPTFS_KEY_VALID 0x00000080
266#define ECRYPTFS_METADATA_IN_XATTR 0x00000100
267#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200
268#define ECRYPTFS_KEY_SET 0x00000400
269#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000800
270#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00001000
271#define ECRYPTFS_ENCFN_USE_FEK 0x00002000
272#define ECRYPTFS_UNLINK_SIGS 0x00004000
273 u32 flags;
274 unsigned int file_version;
275 size_t iv_bytes;
276 size_t metadata_size;
277 size_t extent_size;
278 size_t key_size;
279 size_t extent_shift;
280 unsigned int extent_mask;
281 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
282 struct crypto_blkcipher *tfm;
283 struct crypto_hash *hash_tfm;
284
285 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
286 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
287 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
288 struct list_head keysig_list;
289 struct mutex keysig_list_mutex;
290 struct mutex cs_tfm_mutex;
291 struct mutex cs_hash_tfm_mutex;
292 struct mutex cs_mutex;
293};
294
295
296struct ecryptfs_inode_info {
297 struct inode vfs_inode;
298 struct inode *wii_inode;
299 struct file *lower_file;
300 struct mutex lower_file_mutex;
301 struct ecryptfs_crypt_stat crypt_stat;
302};
303
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306struct ecryptfs_dentry_info {
307 struct path lower_path;
308 struct ecryptfs_crypt_stat *crypt_stat;
309};
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330struct ecryptfs_global_auth_tok {
331#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
332#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
333 u32 flags;
334 struct list_head mount_crypt_stat_list;
335 struct key *global_auth_tok_key;
336 struct ecryptfs_auth_tok *global_auth_tok;
337 unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
338};
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353
354struct ecryptfs_key_tfm {
355 struct crypto_blkcipher *key_tfm;
356 size_t key_size;
357 struct mutex key_tfm_mutex;
358 struct list_head key_tfm_list;
359 unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
360};
361
362extern struct mutex key_tfm_list_mutex;
363
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369
370struct ecryptfs_mount_crypt_stat {
371
372#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
373#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
374#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
375#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
376#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
377#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
378#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
379#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
380 u32 flags;
381 struct list_head global_auth_tok_list;
382 struct mutex global_auth_tok_list_mutex;
383 size_t num_global_auth_toks;
384 size_t global_default_cipher_key_size;
385 size_t global_default_fn_cipher_key_bytes;
386 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
387 + 1];
388 unsigned char global_default_fn_cipher_name[
389 ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
390 char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
391};
392
393
394struct ecryptfs_sb_info {
395 struct super_block *wsi_sb;
396 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
397 struct backing_dev_info bdi;
398};
399
400
401struct ecryptfs_file_info {
402 struct file *wfi_file;
403 struct ecryptfs_crypt_stat *crypt_stat;
404};
405
406
407struct ecryptfs_auth_tok_list_item {
408 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
409 struct list_head list;
410 struct ecryptfs_auth_tok auth_tok;
411};
412
413struct ecryptfs_message {
414
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416
417 u32 index;
418 u32 data_len;
419 u8 data[];
420};
421
422struct ecryptfs_msg_ctx {
423#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
424#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
425#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
426#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
427 u8 state;
428#define ECRYPTFS_MSG_HELO 100
429#define ECRYPTFS_MSG_QUIT 101
430#define ECRYPTFS_MSG_REQUEST 102
431#define ECRYPTFS_MSG_RESPONSE 103
432 u8 type;
433 u32 index;
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439 u32 counter;
440 size_t msg_size;
441 struct ecryptfs_message *msg;
442 struct task_struct *task;
443 struct list_head node;
444 struct list_head daemon_out_list;
445 struct mutex mux;
446};
447
448struct ecryptfs_daemon;
449
450struct ecryptfs_daemon {
451#define ECRYPTFS_DAEMON_IN_READ 0x00000001
452#define ECRYPTFS_DAEMON_IN_POLL 0x00000002
453#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
454#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
455 u32 flags;
456 u32 num_queued_msg_ctx;
457 struct pid *pid;
458 uid_t euid;
459 struct user_namespace *user_ns;
460 struct task_struct *task;
461 struct mutex mux;
462 struct list_head msg_ctx_out_queue;
463 wait_queue_head_t wait;
464 struct hlist_node euid_chain;
465};
466
467extern struct mutex ecryptfs_daemon_hash_mux;
468
469static inline size_t
470ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
471{
472 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
473 return 0;
474 return crypt_stat->metadata_size;
475}
476
477static inline struct ecryptfs_file_info *
478ecryptfs_file_to_private(struct file *file)
479{
480 return file->private_data;
481}
482
483static inline void
484ecryptfs_set_file_private(struct file *file,
485 struct ecryptfs_file_info *file_info)
486{
487 file->private_data = file_info;
488}
489
490static inline struct file *ecryptfs_file_to_lower(struct file *file)
491{
492 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
493}
494
495static inline void
496ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
497{
498 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
499 lower_file;
500}
501
502static inline struct ecryptfs_inode_info *
503ecryptfs_inode_to_private(struct inode *inode)
504{
505 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
506}
507
508static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
509{
510 return ecryptfs_inode_to_private(inode)->wii_inode;
511}
512
513static inline void
514ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
515{
516 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
517}
518
519static inline struct ecryptfs_sb_info *
520ecryptfs_superblock_to_private(struct super_block *sb)
521{
522 return (struct ecryptfs_sb_info *)sb->s_fs_info;
523}
524
525static inline void
526ecryptfs_set_superblock_private(struct super_block *sb,
527 struct ecryptfs_sb_info *sb_info)
528{
529 sb->s_fs_info = sb_info;
530}
531
532static inline struct super_block *
533ecryptfs_superblock_to_lower(struct super_block *sb)
534{
535 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
536}
537
538static inline void
539ecryptfs_set_superblock_lower(struct super_block *sb,
540 struct super_block *lower_sb)
541{
542 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
543}
544
545static inline struct ecryptfs_dentry_info *
546ecryptfs_dentry_to_private(struct dentry *dentry)
547{
548 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
549}
550
551static inline void
552ecryptfs_set_dentry_private(struct dentry *dentry,
553 struct ecryptfs_dentry_info *dentry_info)
554{
555 dentry->d_fsdata = dentry_info;
556}
557
558static inline struct dentry *
559ecryptfs_dentry_to_lower(struct dentry *dentry)
560{
561 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
562}
563
564static inline void
565ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
566{
567 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
568 lower_dentry;
569}
570
571static inline struct vfsmount *
572ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
573{
574 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
575}
576
577static inline void
578ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
579{
580 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
581 lower_mnt;
582}
583
584#define ecryptfs_printk(type, fmt, arg...) \
585 __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
586__attribute__ ((format(printf, 1, 2)))
587void __ecryptfs_printk(const char *fmt, ...);
588
589extern const struct file_operations ecryptfs_main_fops;
590extern const struct file_operations ecryptfs_dir_fops;
591extern const struct inode_operations ecryptfs_main_iops;
592extern const struct inode_operations ecryptfs_dir_iops;
593extern const struct inode_operations ecryptfs_symlink_iops;
594extern const struct super_operations ecryptfs_sops;
595extern const struct dentry_operations ecryptfs_dops;
596extern const struct address_space_operations ecryptfs_aops;
597extern int ecryptfs_verbosity;
598extern unsigned int ecryptfs_message_buf_len;
599extern signed long ecryptfs_message_wait_timeout;
600extern unsigned int ecryptfs_number_of_users;
601
602extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
603extern struct kmem_cache *ecryptfs_file_info_cache;
604extern struct kmem_cache *ecryptfs_dentry_info_cache;
605extern struct kmem_cache *ecryptfs_inode_info_cache;
606extern struct kmem_cache *ecryptfs_sb_info_cache;
607extern struct kmem_cache *ecryptfs_header_cache_1;
608extern struct kmem_cache *ecryptfs_header_cache_2;
609extern struct kmem_cache *ecryptfs_xattr_cache;
610extern struct kmem_cache *ecryptfs_key_record_cache;
611extern struct kmem_cache *ecryptfs_key_sig_cache;
612extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
613extern struct kmem_cache *ecryptfs_key_tfm_cache;
614extern struct kmem_cache *ecryptfs_open_req_cache;
615
616struct ecryptfs_open_req {
617#define ECRYPTFS_REQ_PROCESSED 0x00000001
618#define ECRYPTFS_REQ_DROPPED 0x00000002
619#define ECRYPTFS_REQ_ZOMBIE 0x00000004
620 u32 flags;
621 struct file **lower_file;
622 struct dentry *lower_dentry;
623 struct vfsmount *lower_mnt;
624 wait_queue_head_t wait;
625 struct mutex mux;
626 struct list_head kthread_ctl_list;
627};
628
629#define ECRYPTFS_INTERPOSE_FLAG_D_ADD 0x00000001
630int ecryptfs_interpose(struct dentry *hidden_dentry,
631 struct dentry *this_dentry, struct super_block *sb,
632 u32 flags);
633int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
634 struct dentry *lower_dentry,
635 struct inode *ecryptfs_dir_inode);
636int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
637 size_t *decrypted_name_size,
638 struct dentry *ecryptfs_dentry,
639 const char *name, size_t name_size);
640int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
641int ecryptfs_encrypt_and_encode_filename(
642 char **encoded_name,
643 size_t *encoded_name_size,
644 struct ecryptfs_crypt_stat *crypt_stat,
645 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
646 const char *name, size_t name_size);
647struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
648void ecryptfs_dump_hex(char *data, int bytes);
649int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
650 int sg_size);
651int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
652void ecryptfs_rotate_iv(unsigned char *iv);
653void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
654void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
655void ecryptfs_destroy_mount_crypt_stat(
656 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
657int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
658int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
659int ecryptfs_encrypt_page(struct page *page);
660int ecryptfs_decrypt_page(struct page *page);
661int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry);
662int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
663int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
664void ecryptfs_write_crypt_stat_flags(char *page_virt,
665 struct ecryptfs_crypt_stat *crypt_stat,
666 size_t *written);
667int ecryptfs_read_and_validate_header_region(char *data,
668 struct inode *ecryptfs_inode);
669int ecryptfs_read_and_validate_xattr_region(char *page_virt,
670 struct dentry *ecryptfs_dentry);
671u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
672int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
673void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
674int ecryptfs_generate_key_packet_set(char *dest_base,
675 struct ecryptfs_crypt_stat *crypt_stat,
676 struct dentry *ecryptfs_dentry,
677 size_t *len, size_t max);
678int
679ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
680 unsigned char *src, struct dentry *ecryptfs_dentry);
681int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
682int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode);
683int ecryptfs_inode_set(struct inode *inode, void *lower_inode);
684void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode);
685ssize_t
686ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
687 void *value, size_t size);
688int
689ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
690 size_t size, int flags);
691int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
692int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns,
693 struct pid *pid);
694int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns,
695 struct pid *pid);
696int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
697 struct user_namespace *user_ns, struct pid *pid,
698 u32 seq);
699int ecryptfs_send_message(char *data, int data_len,
700 struct ecryptfs_msg_ctx **msg_ctx);
701int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
702 struct ecryptfs_message **emsg);
703int ecryptfs_init_messaging(void);
704void ecryptfs_release_messaging(void);
705
706void
707ecryptfs_write_header_metadata(char *virt,
708 struct ecryptfs_crypt_stat *crypt_stat,
709 size_t *written);
710int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
711int
712ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
713 char *sig, u32 global_auth_tok_flags);
714int ecryptfs_get_global_auth_tok_for_sig(
715 struct ecryptfs_global_auth_tok **global_auth_tok,
716 struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
717int
718ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
719 size_t key_size);
720int ecryptfs_init_crypto(void);
721int ecryptfs_destroy_crypto(void);
722int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
723int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm,
724 struct mutex **tfm_mutex,
725 char *cipher_name);
726int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
727 struct ecryptfs_auth_tok **auth_tok,
728 char *sig);
729int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
730 loff_t offset, size_t size);
731int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
732 struct page *page_for_lower,
733 size_t offset_in_page, size_t size);
734int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
735int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
736 struct inode *ecryptfs_inode);
737int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
738 pgoff_t page_index,
739 size_t offset_in_page, size_t size,
740 struct inode *ecryptfs_inode);
741struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
742int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
743int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid,
744 struct user_namespace *user_ns);
745int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
746 size_t *length_size);
747int ecryptfs_write_packet_length(char *dest, size_t size,
748 size_t *packet_size_length);
749int ecryptfs_init_ecryptfs_miscdev(void);
750void ecryptfs_destroy_ecryptfs_miscdev(void);
751int ecryptfs_send_miscdev(char *data, size_t data_size,
752 struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
753 u16 msg_flags, struct ecryptfs_daemon *daemon);
754void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
755int
756ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid,
757 struct user_namespace *user_ns, struct pid *pid);
758int ecryptfs_init_kthread(void);
759void ecryptfs_destroy_kthread(void);
760int ecryptfs_privileged_open(struct file **lower_file,
761 struct dentry *lower_dentry,
762 struct vfsmount *lower_mnt,
763 const struct cred *cred);
764int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry);
765int
766ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
767 size_t *packet_size,
768 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
769 char *filename, size_t filename_size);
770int
771ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
772 size_t *packet_size,
773 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
774 char *data, size_t max_packet_size);
775int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
776 loff_t offset);
777
778#endif
779