1/** 2 * eCryptfs: Linux filesystem encryption layer 3 * Kernel declarations. 4 * 5 * Copyright (C) 1997-2003 Erez Zadok 6 * Copyright (C) 2001-2003 Stony Brook University 7 * Copyright (C) 2004-2007 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> 11 * 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. 16 * 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. 21 * 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 25 * 02111-1307, USA. 26 */ 27 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 38/* Version verification for shared data structures w/ userspace */ 39#define ECRYPTFS_VERSION_MAJOR 0x00 40#define ECRYPTFS_VERSION_MINOR 0x04 41#define ECRYPTFS_SUPPORTED_FILE_VERSION 0x02 42/* These flags indicate which features are supported by the kernel 43 * module; userspace tools such as the mount helper read 44 * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine 45 * how to behave. */ 46#define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001 47#define ECRYPTFS_VERSIONING_PUBKEY 0x00000002 48#define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004 49#define ECRYPTFS_VERSIONING_POLICY 0x00000008 50#define ECRYPTFS_VERSIONING_XATTR 0x00000010 51#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ 52 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ 53 | ECRYPTFS_VERSIONING_PUBKEY \ 54 | ECRYPTFS_VERSIONING_XATTR) 55#define ECRYPTFS_MAX_PASSWORD_LENGTH 64 56#define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH 57#define ECRYPTFS_SALT_SIZE 8 58#define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2) 59/* The original signature size is only for what is stored on disk; all 60 * in-memory representations are expanded hex, so it better adapted to 61 * be passed around or referenced on the command line */ 62#define ECRYPTFS_SIG_SIZE 8 63#define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2) 64#define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX 65#define ECRYPTFS_MAX_KEY_BYTES 64 66#define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512 67#define ECRYPTFS_DEFAULT_IV_BYTES 16 68#define ECRYPTFS_FILE_VERSION 0x02 69#define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192 70#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 71#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 72#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 73#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ 74#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) 75#define ECRYPTFS_NLMSG_HELO 100 76#define ECRYPTFS_NLMSG_QUIT 101 77#define ECRYPTFS_NLMSG_REQUEST 102 78#define ECRYPTFS_NLMSG_RESPONSE 103 79#define ECRYPTFS_MAX_PKI_NAME_BYTES 16 80#define ECRYPTFS_DEFAULT_NUM_USERS 4 81#define ECRYPTFS_MAX_NUM_USERS 32768 82#define ECRYPTFS_TRANSPORT_NETLINK 0 83#define ECRYPTFS_TRANSPORT_CONNECTOR 1 84#define ECRYPTFS_TRANSPORT_RELAYFS 2 85#define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK 86#define ECRYPTFS_XATTR_NAME "user.ecryptfs" 87 88#define RFC2440_CIPHER_DES3_EDE 0x02 89#define RFC2440_CIPHER_CAST_5 0x03 90#define RFC2440_CIPHER_BLOWFISH 0x04 91#define RFC2440_CIPHER_AES_128 0x07 92#define RFC2440_CIPHER_AES_192 0x08 93#define RFC2440_CIPHER_AES_256 0x09 94#define RFC2440_CIPHER_TWOFISH 0x0a 95#define RFC2440_CIPHER_CAST_6 0x0b 96 97#define RFC2440_CIPHER_RSA 0x01 98 99/** 100 * For convenience, we may need to pass around the encrypted session 101 * key between kernel and userspace because the authentication token 102 * may not be extractable. For example, the TPM may not release the 103 * private key, instead requiring the encrypted data and returning the 104 * decrypted data. 105 */ 106struct ecryptfs_session_key { 107#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001 108#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002 109#define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004 110#define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008 111 u32 flags; 112 u32 encrypted_key_size; 113 u32 decrypted_key_size; 114 u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; 115 u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES]; 116}; 117 118struct ecryptfs_password { 119 u32 password_bytes; 120 s32 hash_algo; 121 u32 hash_iterations; 122 u32 session_key_encryption_key_bytes; 123#define ECRYPTFS_PERSISTENT_PASSWORD 0x01 124#define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02 125 u32 flags; 126 /* Iterated-hash concatenation of salt and passphrase */ 127 u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; 128 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; 129 /* Always in expanded hex */ 130 u8 salt[ECRYPTFS_SALT_SIZE]; 131}; 132 133enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; 134 135struct ecryptfs_private_key { 136 u32 key_size; 137 u32 data_len; 138 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; 139 char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1]; 140 u8 data[]; 141}; 142 143/* May be a password or a private key */ 144struct ecryptfs_auth_tok { 145 u16 version; /* 8-bit major and 8-bit minor */ 146 u16 token_type; 147 u32 flags; 148 struct ecryptfs_session_key session_key; 149 u8 reserved[32]; 150 union { 151 struct ecryptfs_password password; 152 struct ecryptfs_private_key private_key; 153 } token; 154} __attribute__ ((packed)); 155 156void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); 157extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); 158extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); 159 160struct ecryptfs_key_record { 161 unsigned char type; 162 size_t enc_key_size; 163 unsigned char sig[ECRYPTFS_SIG_SIZE]; 164 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; 165}; 166 167struct ecryptfs_auth_tok_list { 168 struct ecryptfs_auth_tok *auth_tok; 169 struct list_head list; 170}; 171 172struct ecryptfs_crypt_stat; 173struct ecryptfs_mount_crypt_stat; 174 175struct ecryptfs_page_crypt_context { 176 struct page *page; 177#define ECRYPTFS_PREPARE_COMMIT_MODE 0 178#define ECRYPTFS_WRITEPAGE_MODE 1 179 unsigned int mode; 180 union { 181 struct file *lower_file; 182 struct writeback_control *wbc; 183 } param; 184}; 185 186static inline struct ecryptfs_auth_tok * 187ecryptfs_get_key_payload_data(struct key *key) 188{ 189 return (struct ecryptfs_auth_tok *) 190 (((struct user_key_payload*)key->payload.data)->data); 191} 192 193#define ECRYPTFS_SUPER_MAGIC 0xf15f 194#define ECRYPTFS_MAX_KEYSET_SIZE 1024 195#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 196#define ECRYPTFS_MAX_NUM_ENC_KEYS 64 197#define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */ 198#define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ 199#define ECRYPTFS_SALT_BYTES 2 200#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 201#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ 202#define ECRYPTFS_FILE_SIZE_BYTES 8 203#define ECRYPTFS_DEFAULT_CIPHER "aes" 204#define ECRYPTFS_DEFAULT_KEY_BYTES 16 205#define ECRYPTFS_DEFAULT_HASH "md5" 206#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 207#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C 208#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED 209#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40 210#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41 211#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42 212#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43 213#define MD5_DIGEST_SIZE 16 214 215/** 216 * This is the primary struct associated with each encrypted file. 217 * 218 * TODO: cache align/pack? 219 */ 220struct ecryptfs_crypt_stat { 221#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 222#define ECRYPTFS_POLICY_APPLIED 0x00000002 223#define ECRYPTFS_NEW_FILE 0x00000004 224#define ECRYPTFS_ENCRYPTED 0x00000008 225#define ECRYPTFS_SECURITY_WARNING 0x00000010 226#define ECRYPTFS_ENABLE_HMAC 0x00000020 227#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 228#define ECRYPTFS_KEY_VALID 0x00000080 229#define ECRYPTFS_METADATA_IN_XATTR 0x00000100 230#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 231 u32 flags; 232 unsigned int file_version; 233 size_t iv_bytes; 234 size_t num_keysigs; 235 size_t header_extent_size; 236 size_t num_header_extents_at_front; 237 size_t extent_size; /* Data extent size; default is 4096 */ 238 size_t key_size; 239 size_t extent_shift; 240 unsigned int extent_mask; 241 struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 242 struct crypto_blkcipher *tfm; 243 struct crypto_hash *hash_tfm; /* Crypto context for generating 244 * the initialization vectors */ 245 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; 246 unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; 247 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; 248 unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX]; 249 struct mutex cs_tfm_mutex; 250 struct mutex cs_hash_tfm_mutex; 251 struct mutex cs_mutex; 252}; 253 254/* inode private data. */ 255struct ecryptfs_inode_info { 256 struct inode vfs_inode; 257 struct inode *wii_inode; 258 struct ecryptfs_crypt_stat crypt_stat; 259}; 260 261/* dentry private data. Each dentry must keep track of a lower 262 * vfsmount too. */ 263struct ecryptfs_dentry_info { 264 struct path lower_path; 265 struct ecryptfs_crypt_stat *crypt_stat; 266}; 267 268/** 269 * This struct is to enable a mount-wide passphrase/salt combo. This 270 * is more or less a stopgap to provide similar functionality to other 271 * crypto filesystems like EncFS or CFS until full policy support is 272 * implemented in eCryptfs. 273 */ 274struct ecryptfs_mount_crypt_stat { 275 /* Pointers to memory we do not own, do not free these */ 276#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 277#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 278#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 279 u32 flags; 280 struct ecryptfs_auth_tok *global_auth_tok; 281 struct key *global_auth_tok_key; 282 size_t global_default_cipher_key_size; 283 struct crypto_blkcipher *global_key_tfm; 284 struct mutex global_key_tfm_mutex; 285 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE 286 + 1]; 287 unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; 288}; 289 290/* superblock private data. */ 291struct ecryptfs_sb_info { 292 struct super_block *wsi_sb; 293 struct ecryptfs_mount_crypt_stat mount_crypt_stat; 294}; 295 296/* file private data. */ 297struct ecryptfs_file_info { 298 struct file *wfi_file; 299 struct ecryptfs_crypt_stat *crypt_stat; 300}; 301 302/* auth_tok <=> encrypted_session_key mappings */ 303struct ecryptfs_auth_tok_list_item { 304 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; 305 struct list_head list; 306 struct ecryptfs_auth_tok auth_tok; 307}; 308 309struct ecryptfs_message { 310 u32 index; 311 u32 data_len; 312 u8 data[]; 313}; 314 315struct ecryptfs_msg_ctx { 316#define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 317#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 318#define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 319 u32 state; 320 unsigned int index; 321 unsigned int counter; 322 struct ecryptfs_message *msg; 323 struct task_struct *task; 324 struct list_head node; 325 struct mutex mux; 326}; 327 328extern unsigned int ecryptfs_transport; 329 330struct ecryptfs_daemon_id { 331 pid_t pid; 332 uid_t uid; 333 struct hlist_node id_chain; 334}; 335 336static inline struct ecryptfs_file_info * 337ecryptfs_file_to_private(struct file *file) 338{ 339 return (struct ecryptfs_file_info *)file->private_data; 340} 341 342static inline void 343ecryptfs_set_file_private(struct file *file, 344 struct ecryptfs_file_info *file_info) 345{ 346 file->private_data = file_info; 347} 348 349static inline struct file *ecryptfs_file_to_lower(struct file *file) 350{ 351 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; 352} 353 354static inline void 355ecryptfs_set_file_lower(struct file *file, struct file *lower_file) 356{ 357 ((struct ecryptfs_file_info *)file->private_data)->wfi_file = 358 lower_file; 359} 360 361static inline struct ecryptfs_inode_info * 362ecryptfs_inode_to_private(struct inode *inode) 363{ 364 return container_of(inode, struct ecryptfs_inode_info, vfs_inode); 365} 366 367static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) 368{ 369 return ecryptfs_inode_to_private(inode)->wii_inode; 370} 371 372static inline void 373ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) 374{ 375 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; 376} 377 378static inline struct ecryptfs_sb_info * 379ecryptfs_superblock_to_private(struct super_block *sb) 380{ 381 return (struct ecryptfs_sb_info *)sb->s_fs_info; 382} 383 384static inline void 385ecryptfs_set_superblock_private(struct super_block *sb, 386 struct ecryptfs_sb_info *sb_info) 387{ 388 sb->s_fs_info = sb_info; 389} 390 391static inline struct super_block * 392ecryptfs_superblock_to_lower(struct super_block *sb) 393{ 394 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; 395} 396 397static inline void 398ecryptfs_set_superblock_lower(struct super_block *sb, 399 struct super_block *lower_sb) 400{ 401 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; 402} 403 404static inline struct ecryptfs_dentry_info * 405ecryptfs_dentry_to_private(struct dentry *dentry) 406{ 407 return (struct ecryptfs_dentry_info *)dentry->d_fsdata; 408} 409 410static inline void 411ecryptfs_set_dentry_private(struct dentry *dentry, 412 struct ecryptfs_dentry_info *dentry_info) 413{ 414 dentry->d_fsdata = dentry_info; 415} 416 417static inline struct dentry * 418ecryptfs_dentry_to_lower(struct dentry *dentry) 419{ 420 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; 421} 422 423static inline void 424ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) 425{ 426 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry = 427 lower_dentry; 428} 429 430static inline struct vfsmount * 431ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) 432{ 433 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt; 434} 435 436static inline void 437ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) 438{ 439 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt = 440 lower_mnt; 441} 442 443#define ecryptfs_printk(type, fmt, arg...) \ 444 __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); 445void __ecryptfs_printk(const char *fmt, ...); 446 447extern const struct file_operations ecryptfs_main_fops; 448extern const struct file_operations ecryptfs_dir_fops; 449extern const struct inode_operations ecryptfs_main_iops; 450extern const struct inode_operations ecryptfs_dir_iops; 451extern const struct inode_operations ecryptfs_symlink_iops; 452extern const struct super_operations ecryptfs_sops; 453extern struct dentry_operations ecryptfs_dops; 454extern struct address_space_operations ecryptfs_aops; 455extern int ecryptfs_verbosity; 456extern unsigned int ecryptfs_message_buf_len; 457extern signed long ecryptfs_message_wait_timeout; 458extern unsigned int ecryptfs_number_of_users; 459 460extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; 461extern struct kmem_cache *ecryptfs_file_info_cache; 462extern struct kmem_cache *ecryptfs_dentry_info_cache; 463extern struct kmem_cache *ecryptfs_inode_info_cache; 464extern struct kmem_cache *ecryptfs_sb_info_cache; 465extern struct kmem_cache *ecryptfs_header_cache_0; 466extern struct kmem_cache *ecryptfs_header_cache_1; 467extern struct kmem_cache *ecryptfs_header_cache_2; 468extern struct kmem_cache *ecryptfs_xattr_cache; 469extern struct kmem_cache *ecryptfs_lower_page_cache; 470extern struct kmem_cache *ecryptfs_key_record_cache; 471 472int ecryptfs_interpose(struct dentry *hidden_dentry, 473 struct dentry *this_dentry, struct super_block *sb, 474 int flag); 475int ecryptfs_fill_zeros(struct file *file, loff_t new_length); 476int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat, 477 const char *name, int length, 478 char **decrypted_name); 479int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat, 480 const char *name, int length, 481 char **encoded_name); 482struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); 483void ecryptfs_dump_hex(char *data, int bytes); 484int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, 485 int sg_size); 486int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); 487void ecryptfs_rotate_iv(unsigned char *iv); 488void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); 489void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); 490void ecryptfs_destruct_mount_crypt_stat( 491 struct ecryptfs_mount_crypt_stat *mount_crypt_stat); 492int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); 493int ecryptfs_crypto_api_algify_cipher_name(char **algified_name, 494 char *cipher_name, 495 char *chaining_modifier); 496#define ECRYPTFS_LOWER_I_MUTEX_NOT_HELD 0 497#define ECRYPTFS_LOWER_I_MUTEX_HELD 1 498int ecryptfs_write_inode_size_to_metadata(struct file *lower_file, 499 struct inode *lower_inode, 500 struct inode *inode, 501 struct dentry *ecryptfs_dentry, 502 int lower_i_mutex_held); 503int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, 504 struct file *lower_file, 505 unsigned long lower_page_index, int byte_offset, 506 int region_bytes); 507int 508ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, 509 struct file *lower_file, int byte_offset, 510 int region_size); 511int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, 512 struct file *lower_file); 513int ecryptfs_do_readpage(struct file *file, struct page *page, 514 pgoff_t lower_page_index); 515int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, 516 struct inode *lower_inode, 517 struct writeback_control *wbc); 518int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx); 519int ecryptfs_decrypt_page(struct file *file, struct page *page); 520int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, 521 struct file *lower_file); 522int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry, 523 struct file *lower_file); 524int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); 525int ecryptfs_read_and_validate_header_region(char *data, struct dentry *dentry, 526 struct vfsmount *mnt); 527int ecryptfs_read_and_validate_xattr_region(char *page_virt, 528 struct dentry *ecryptfs_dentry); 529u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); 530int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); 531void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); 532int ecryptfs_generate_key_packet_set(char *dest_base, 533 struct ecryptfs_crypt_stat *crypt_stat, 534 struct dentry *ecryptfs_dentry, 535 size_t *len, size_t max); 536int process_request_key_err(long err_code); 537int 538ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, 539 unsigned char *src, struct dentry *ecryptfs_dentry); 540int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); 541int 542ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name, 543 size_t *key_size); 544int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); 545int ecryptfs_inode_set(struct inode *inode, void *lower_inode); 546void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); 547int ecryptfs_open_lower_file(struct file **lower_file, 548 struct dentry *lower_dentry, 549 struct vfsmount *lower_mnt, int flags); 550int ecryptfs_close_lower_file(struct file *lower_file); 551ssize_t ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, 552 size_t size); 553int 554ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, 555 size_t size, int flags); 556int ecryptfs_read_xattr_region(char *page_virt, struct dentry *ecryptfs_dentry); 557int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid); 558int ecryptfs_process_quit(uid_t uid, pid_t pid); 559int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, 560 pid_t pid, u32 seq); 561int ecryptfs_send_message(unsigned int transport, char *data, int data_len, 562 struct ecryptfs_msg_ctx **msg_ctx); 563int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, 564 struct ecryptfs_message **emsg); 565int ecryptfs_init_messaging(unsigned int transport); 566void ecryptfs_release_messaging(unsigned int transport); 567 568int ecryptfs_send_netlink(char *data, int data_len, 569 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, 570 u16 msg_flags, pid_t daemon_pid); 571int ecryptfs_init_netlink(void); 572void ecryptfs_release_netlink(void); 573 574int ecryptfs_send_connector(char *data, int data_len, 575 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, 576 u16 msg_flags, pid_t daemon_pid); 577int ecryptfs_init_connector(void); 578void ecryptfs_release_connector(void); 579void 580ecryptfs_write_header_metadata(char *virt, 581 struct ecryptfs_crypt_stat *crypt_stat, 582 size_t *written); 583int ecryptfs_write_zeros(struct file *file, pgoff_t index, int start, 584 int num_zeros); 585 586#endif /* #ifndef ECRYPTFS_KERNEL_H */ 587