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 ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag)) 98 #define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag)) 99 #define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag)) 100 #define RFC2440_CIPHER_RSA 0x01 101 102 /** 103 * For convenience, we may need to pass around the encrypted session 104 * key between kernel and userspace because the authentication token 105 * may not be extractable. For example, the TPM may not release the 106 * private key, instead requiring the encrypted data and returning the 107 * decrypted data. 108 */ 109 struct ecryptfs_session_key { 110 #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001 111 #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002 112 #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004 113 #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008 114 u32 flags; 115 u32 encrypted_key_size; 116 u32 decrypted_key_size; 117 u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; 118 u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES]; 119 }; 120 121 struct ecryptfs_password { 122 u32 password_bytes; 123 s32 hash_algo; 124 u32 hash_iterations; 125 u32 session_key_encryption_key_bytes; 126 #define ECRYPTFS_PERSISTENT_PASSWORD 0x01 127 #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02 128 u32 flags; 129 /* Iterated-hash concatenation of salt and passphrase */ 130 u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; 131 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; 132 /* Always in expanded hex */ 133 u8 salt[ECRYPTFS_SALT_SIZE]; 134 }; 135 136 enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; 137 138 struct ecryptfs_private_key { 139 u32 key_size; 140 u32 data_len; 141 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; 142 char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1]; 143 u8 data[]; 144 }; 145 146 /* May be a password or a private key */ 147 struct ecryptfs_auth_tok { 148 u16 version; /* 8-bit major and 8-bit minor */ 149 u16 token_type; 150 u32 flags; 151 struct ecryptfs_session_key session_key; 152 u8 reserved[32]; 153 union { 154 struct ecryptfs_password password; 155 struct ecryptfs_private_key private_key; 156 } token; 157 } __attribute__ ((packed)); 158 159 void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); 160 extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); 161 extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); 162 163 struct ecryptfs_key_record { 164 unsigned char type; 165 size_t enc_key_size; 166 unsigned char sig[ECRYPTFS_SIG_SIZE]; 167 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; 168 }; 169 170 struct ecryptfs_auth_tok_list { 171 struct ecryptfs_auth_tok *auth_tok; 172 struct list_head list; 173 }; 174 175 struct ecryptfs_crypt_stat; 176 struct ecryptfs_mount_crypt_stat; 177 178 struct ecryptfs_page_crypt_context { 179 struct page *page; 180 #define ECRYPTFS_PREPARE_COMMIT_MODE 0 181 #define ECRYPTFS_WRITEPAGE_MODE 1 182 unsigned int mode; 183 union { 184 struct file *lower_file; 185 struct writeback_control *wbc; 186 } param; 187 }; 188 189 static inline struct ecryptfs_auth_tok * 190 ecryptfs_get_key_payload_data(struct key *key) 191 { 192 return (struct ecryptfs_auth_tok *) 193 (((struct user_key_payload*)key->payload.data)->data); 194 } 195 196 #define ECRYPTFS_SUPER_MAGIC 0xf15f 197 #define ECRYPTFS_MAX_KEYSET_SIZE 1024 198 #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 199 #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 200 #define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */ 201 #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ 202 #define ECRYPTFS_SALT_BYTES 2 203 #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 204 #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ 205 #define ECRYPTFS_FILE_SIZE_BYTES 8 206 #define ECRYPTFS_DEFAULT_CIPHER "aes" 207 #define ECRYPTFS_DEFAULT_KEY_BYTES 16 208 #define ECRYPTFS_DEFAULT_HASH "md5" 209 #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 210 #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C 211 #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED 212 #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40 213 #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41 214 #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42 215 #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43 216 #define MD5_DIGEST_SIZE 16 217 218 /** 219 * This is the primary struct associated with each encrypted file. 220 * 221 * TODO: cache align/pack? 222 */ 223 struct ecryptfs_crypt_stat { 224 #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 225 #define ECRYPTFS_POLICY_APPLIED 0x00000002 226 #define ECRYPTFS_NEW_FILE 0x00000004 227 #define ECRYPTFS_ENCRYPTED 0x00000008 228 #define ECRYPTFS_SECURITY_WARNING 0x00000010 229 #define ECRYPTFS_ENABLE_HMAC 0x00000020 230 #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 231 #define ECRYPTFS_KEY_VALID 0x00000080 232 #define ECRYPTFS_METADATA_IN_XATTR 0x00000100 233 #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 234 u32 flags; 235 unsigned int file_version; 236 size_t iv_bytes; 237 size_t num_keysigs; 238 size_t header_extent_size; 239 size_t num_header_extents_at_front; 240 size_t extent_size; /* Data extent size; default is 4096 */ 241 size_t key_size; 242 size_t extent_shift; 243 unsigned int extent_mask; 244 struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 245 struct crypto_blkcipher *tfm; 246 struct crypto_hash *hash_tfm; /* Crypto context for generating 247 * the initialization vectors */ 248 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; 249 unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; 250 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; 251 unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX]; 252 struct mutex cs_tfm_mutex; 253 struct mutex cs_hash_tfm_mutex; 254 struct mutex cs_mutex; 255 }; 256 257 /* inode private data. */ 258 struct ecryptfs_inode_info { 259 struct inode vfs_inode; 260 struct inode *wii_inode; 261 struct ecryptfs_crypt_stat crypt_stat; 262 }; 263 264 /* dentry private data. Each dentry must keep track of a lower 265 * vfsmount too. */ 266 struct ecryptfs_dentry_info { 267 struct path lower_path; 268 struct ecryptfs_crypt_stat *crypt_stat; 269 }; 270 271 /** 272 * This struct is to enable a mount-wide passphrase/salt combo. This 273 * is more or less a stopgap to provide similar functionality to other 274 * crypto filesystems like EncFS or CFS until full policy support is 275 * implemented in eCryptfs. 276 */ 277 struct ecryptfs_mount_crypt_stat { 278 /* Pointers to memory we do not own, do not free these */ 279 #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 280 #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 281 #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 282 u32 flags; 283 struct ecryptfs_auth_tok *global_auth_tok; 284 struct key *global_auth_tok_key; 285 size_t global_default_cipher_key_size; 286 struct crypto_blkcipher *global_key_tfm; 287 struct mutex global_key_tfm_mutex; 288 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE 289 + 1]; 290 unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; 291 }; 292 293 /* superblock private data. */ 294 struct ecryptfs_sb_info { 295 struct super_block *wsi_sb; 296 struct ecryptfs_mount_crypt_stat mount_crypt_stat; 297 }; 298 299 /* file private data. */ 300 struct ecryptfs_file_info { 301 struct file *wfi_file; 302 struct ecryptfs_crypt_stat *crypt_stat; 303 }; 304 305 /* auth_tok <=> encrypted_session_key mappings */ 306 struct ecryptfs_auth_tok_list_item { 307 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; 308 struct list_head list; 309 struct ecryptfs_auth_tok auth_tok; 310 }; 311 312 struct ecryptfs_message { 313 u32 index; 314 u32 data_len; 315 u8 data[]; 316 }; 317 318 struct ecryptfs_msg_ctx { 319 #define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 320 #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 321 #define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 322 u32 state; 323 unsigned int index; 324 unsigned int counter; 325 struct ecryptfs_message *msg; 326 struct task_struct *task; 327 struct list_head node; 328 struct mutex mux; 329 }; 330 331 extern unsigned int ecryptfs_transport; 332 333 struct ecryptfs_daemon_id { 334 pid_t pid; 335 uid_t uid; 336 struct hlist_node id_chain; 337 }; 338 339 static inline struct ecryptfs_file_info * 340 ecryptfs_file_to_private(struct file *file) 341 { 342 return (struct ecryptfs_file_info *)file->private_data; 343 } 344 345 static inline void 346 ecryptfs_set_file_private(struct file *file, 347 struct ecryptfs_file_info *file_info) 348 { 349 file->private_data = file_info; 350 } 351 352 static inline struct file *ecryptfs_file_to_lower(struct file *file) 353 { 354 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; 355 } 356 357 static inline void 358 ecryptfs_set_file_lower(struct file *file, struct file *lower_file) 359 { 360 ((struct ecryptfs_file_info *)file->private_data)->wfi_file = 361 lower_file; 362 } 363 364 static inline struct ecryptfs_inode_info * 365 ecryptfs_inode_to_private(struct inode *inode) 366 { 367 return container_of(inode, struct ecryptfs_inode_info, vfs_inode); 368 } 369 370 static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) 371 { 372 return ecryptfs_inode_to_private(inode)->wii_inode; 373 } 374 375 static inline void 376 ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) 377 { 378 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; 379 } 380 381 static inline struct ecryptfs_sb_info * 382 ecryptfs_superblock_to_private(struct super_block *sb) 383 { 384 return (struct ecryptfs_sb_info *)sb->s_fs_info; 385 } 386 387 static inline void 388 ecryptfs_set_superblock_private(struct super_block *sb, 389 struct ecryptfs_sb_info *sb_info) 390 { 391 sb->s_fs_info = sb_info; 392 } 393 394 static inline struct super_block * 395 ecryptfs_superblock_to_lower(struct super_block *sb) 396 { 397 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; 398 } 399 400 static inline void 401 ecryptfs_set_superblock_lower(struct super_block *sb, 402 struct super_block *lower_sb) 403 { 404 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; 405 } 406 407 static inline struct ecryptfs_dentry_info * 408 ecryptfs_dentry_to_private(struct dentry *dentry) 409 { 410 return (struct ecryptfs_dentry_info *)dentry->d_fsdata; 411 } 412 413 static inline void 414 ecryptfs_set_dentry_private(struct dentry *dentry, 415 struct ecryptfs_dentry_info *dentry_info) 416 { 417 dentry->d_fsdata = dentry_info; 418 } 419 420 static inline struct dentry * 421 ecryptfs_dentry_to_lower(struct dentry *dentry) 422 { 423 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; 424 } 425 426 static inline void 427 ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) 428 { 429 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry = 430 lower_dentry; 431 } 432 433 static inline struct vfsmount * 434 ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) 435 { 436 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt; 437 } 438 439 static inline void 440 ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) 441 { 442 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt = 443 lower_mnt; 444 } 445 446 #define ecryptfs_printk(type, fmt, arg...) \ 447 __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); 448 void __ecryptfs_printk(const char *fmt, ...); 449 450 extern const struct file_operations ecryptfs_main_fops; 451 extern const struct file_operations ecryptfs_dir_fops; 452 extern struct inode_operations ecryptfs_main_iops; 453 extern struct inode_operations ecryptfs_dir_iops; 454 extern struct inode_operations ecryptfs_symlink_iops; 455 extern struct super_operations ecryptfs_sops; 456 extern struct dentry_operations ecryptfs_dops; 457 extern struct address_space_operations ecryptfs_aops; 458 extern int ecryptfs_verbosity; 459 extern unsigned int ecryptfs_message_buf_len; 460 extern signed long ecryptfs_message_wait_timeout; 461 extern unsigned int ecryptfs_number_of_users; 462 463 extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; 464 extern struct kmem_cache *ecryptfs_file_info_cache; 465 extern struct kmem_cache *ecryptfs_dentry_info_cache; 466 extern struct kmem_cache *ecryptfs_inode_info_cache; 467 extern struct kmem_cache *ecryptfs_sb_info_cache; 468 extern struct kmem_cache *ecryptfs_header_cache_0; 469 extern struct kmem_cache *ecryptfs_header_cache_1; 470 extern struct kmem_cache *ecryptfs_header_cache_2; 471 extern struct kmem_cache *ecryptfs_xattr_cache; 472 extern struct kmem_cache *ecryptfs_lower_page_cache; 473 474 int ecryptfs_interpose(struct dentry *hidden_dentry, 475 struct dentry *this_dentry, struct super_block *sb, 476 int flag); 477 int ecryptfs_fill_zeros(struct file *file, loff_t new_length); 478 int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat, 479 const char *name, int length, 480 char **decrypted_name); 481 int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat, 482 const char *name, int length, 483 char **encoded_name); 484 struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); 485 void ecryptfs_dump_hex(char *data, int bytes); 486 int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, 487 int sg_size); 488 int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); 489 void ecryptfs_rotate_iv(unsigned char *iv); 490 void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); 491 void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); 492 void ecryptfs_destruct_mount_crypt_stat( 493 struct ecryptfs_mount_crypt_stat *mount_crypt_stat); 494 int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); 495 int ecryptfs_crypto_api_algify_cipher_name(char **algified_name, 496 char *cipher_name, 497 char *chaining_modifier); 498 #define ECRYPTFS_LOWER_I_MUTEX_NOT_HELD 0 499 #define ECRYPTFS_LOWER_I_MUTEX_HELD 1 500 int ecryptfs_write_inode_size_to_metadata(struct file *lower_file, 501 struct inode *lower_inode, 502 struct inode *inode, 503 struct dentry *ecryptfs_dentry, 504 int lower_i_mutex_held); 505 int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, 506 struct file *lower_file, 507 unsigned long lower_page_index, int byte_offset, 508 int region_bytes); 509 int 510 ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, 511 struct file *lower_file, int byte_offset, 512 int region_size); 513 int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, 514 struct file *lower_file); 515 int ecryptfs_do_readpage(struct file *file, struct page *page, 516 pgoff_t lower_page_index); 517 int ecryptfs_grab_and_map_lower_page(struct page **lower_page, 518 char **lower_virt, 519 struct inode *lower_inode, 520 unsigned long lower_page_index); 521 int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, 522 struct inode *lower_inode, 523 struct writeback_control *wbc); 524 int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx); 525 int ecryptfs_decrypt_page(struct file *file, struct page *page); 526 int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, 527 struct file *lower_file); 528 int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry, 529 struct file *lower_file); 530 int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); 531 int ecryptfs_read_and_validate_header_region(char *data, struct dentry *dentry, 532 struct vfsmount *mnt); 533 int ecryptfs_read_and_validate_xattr_region(char *page_virt, 534 struct dentry *ecryptfs_dentry); 535 u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); 536 int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); 537 void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); 538 int ecryptfs_generate_key_packet_set(char *dest_base, 539 struct ecryptfs_crypt_stat *crypt_stat, 540 struct dentry *ecryptfs_dentry, 541 size_t *len, size_t max); 542 int process_request_key_err(long err_code); 543 int 544 ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, 545 unsigned char *src, struct dentry *ecryptfs_dentry); 546 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); 547 int 548 ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name, 549 size_t *key_size); 550 int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); 551 int ecryptfs_inode_set(struct inode *inode, void *lower_inode); 552 void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); 553 int ecryptfs_open_lower_file(struct file **lower_file, 554 struct dentry *lower_dentry, 555 struct vfsmount *lower_mnt, int flags); 556 int ecryptfs_close_lower_file(struct file *lower_file); 557 ssize_t ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, 558 size_t size); 559 int 560 ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, 561 size_t size, int flags); 562 563 int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid); 564 int ecryptfs_process_quit(uid_t uid, pid_t pid); 565 int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, 566 pid_t pid, u32 seq); 567 int ecryptfs_send_message(unsigned int transport, char *data, int data_len, 568 struct ecryptfs_msg_ctx **msg_ctx); 569 int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, 570 struct ecryptfs_message **emsg); 571 int ecryptfs_init_messaging(unsigned int transport); 572 void ecryptfs_release_messaging(unsigned int transport); 573 574 int ecryptfs_send_netlink(char *data, int data_len, 575 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, 576 u16 msg_flags, pid_t daemon_pid); 577 int ecryptfs_init_netlink(void); 578 void ecryptfs_release_netlink(void); 579 580 int ecryptfs_send_connector(char *data, int data_len, 581 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, 582 u16 msg_flags, pid_t daemon_pid); 583 int ecryptfs_init_connector(void); 584 void ecryptfs_release_connector(void); 585 586 587 #endif /* #ifndef ECRYPTFS_KERNEL_H */ 588