Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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 |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 7 | * Copyright (C) 2004-2008 International Business Machines Corp. |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 8 | * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 9 | * Trevor S. Highland <trevor.highland@gmail.com> |
| 10 | * Tyler Hicks <tyhicks@ou.edu> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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> |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 33 | #include <linux/fs_stack.h> |
Josef "Jeff" Sipek | b65d34f | 2006-12-08 02:36:34 -0800 | [diff] [blame] | 34 | #include <linux/namei.h> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 35 | #include <linux/scatterlist.h> |
Michael Halcrow | dddfa46 | 2007-02-12 00:53:44 -0800 | [diff] [blame] | 36 | #include <linux/hash.h> |
Michael Halcrow | 6a3fd92 | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 37 | #include <linux/nsproxy.h> |
Jens Axboe | 9df9c8b | 2010-04-22 12:22:04 +0200 | [diff] [blame] | 38 | #include <linux/backing-dev.h> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 39 | |
| 40 | /* Version verification for shared data structures w/ userspace */ |
| 41 | #define ECRYPTFS_VERSION_MAJOR 0x00 |
| 42 | #define ECRYPTFS_VERSION_MINOR 0x04 |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 43 | #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 44 | /* These flags indicate which features are supported by the kernel |
| 45 | * module; userspace tools such as the mount helper read |
| 46 | * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine |
| 47 | * how to behave. */ |
Michael Halcrow | 1739895 | 2007-02-12 00:53:45 -0800 | [diff] [blame] | 48 | #define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001 |
| 49 | #define ECRYPTFS_VERSIONING_PUBKEY 0x00000002 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 50 | #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004 |
Michael Halcrow | 1739895 | 2007-02-12 00:53:45 -0800 | [diff] [blame] | 51 | #define ECRYPTFS_VERSIONING_POLICY 0x00000008 |
| 52 | #define ECRYPTFS_VERSIONING_XATTR 0x00000010 |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 53 | #define ECRYPTFS_VERSIONING_MULTKEY 0x00000020 |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 54 | #define ECRYPTFS_VERSIONING_DEVMISC 0x00000040 |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 55 | #define ECRYPTFS_VERSIONING_HMAC 0x00000080 |
| 56 | #define ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION 0x00000100 |
| 57 | #define ECRYPTFS_VERSIONING_GCM 0x00000200 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 58 | #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ |
Michael Halcrow | 1739895 | 2007-02-12 00:53:45 -0800 | [diff] [blame] | 59 | | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 60 | | ECRYPTFS_VERSIONING_PUBKEY \ |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 61 | | ECRYPTFS_VERSIONING_XATTR \ |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 62 | | ECRYPTFS_VERSIONING_MULTKEY \ |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 63 | | ECRYPTFS_VERSIONING_DEVMISC \ |
| 64 | | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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 | /* The original signature size is only for what is stored on disk; all |
| 70 | * in-memory representations are expanded hex, so it better adapted to |
| 71 | * be passed around or referenced on the command line */ |
| 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 |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 78 | #define ECRYPTFS_FILE_VERSION 0x03 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 79 | #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 |
| 80 | #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 81 | #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 |
| 82 | #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ |
| 83 | #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 84 | #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 |
| 85 | #define ECRYPTFS_DEFAULT_NUM_USERS 4 |
| 86 | #define ECRYPTFS_MAX_NUM_USERS 32768 |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 87 | #define ECRYPTFS_XATTR_NAME "user.ecryptfs" |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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 | |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 98 | #define RFC2440_CIPHER_RSA 0x01 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 99 | |
| 100 | /** |
| 101 | * For convenience, we may need to pass around the encrypted session |
| 102 | * key between kernel and userspace because the authentication token |
| 103 | * may not be extractable. For example, the TPM may not release the |
| 104 | * private key, instead requiring the encrypted data and returning the |
| 105 | * decrypted data. |
| 106 | */ |
| 107 | struct 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 | |
| 119 | struct 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 | /* Iterated-hash concatenation of salt and passphrase */ |
| 128 | u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; |
| 129 | u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; |
| 130 | /* Always in expanded hex */ |
| 131 | u8 salt[ECRYPTFS_SALT_SIZE]; |
| 132 | }; |
| 133 | |
| 134 | enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; |
| 135 | |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 136 | struct 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 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 144 | /* May be a password or a private key */ |
| 145 | struct ecryptfs_auth_tok { |
| 146 | u16 version; /* 8-bit major and 8-bit minor */ |
| 147 | u16 token_type; |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 148 | #define ECRYPTFS_ENCRYPT_ONLY 0x00000001 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 149 | u32 flags; |
| 150 | struct ecryptfs_session_key session_key; |
| 151 | u8 reserved[32]; |
| 152 | union { |
| 153 | struct ecryptfs_password password; |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 154 | struct ecryptfs_private_key private_key; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 155 | } token; |
| 156 | } __attribute__ ((packed)); |
| 157 | |
| 158 | void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); |
| 159 | extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); |
| 160 | extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); |
| 161 | |
| 162 | struct 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 | |
| 169 | struct ecryptfs_auth_tok_list { |
| 170 | struct ecryptfs_auth_tok *auth_tok; |
| 171 | struct list_head list; |
| 172 | }; |
| 173 | |
| 174 | struct ecryptfs_crypt_stat; |
| 175 | struct ecryptfs_mount_crypt_stat; |
| 176 | |
| 177 | struct 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 | |
| 188 | static inline struct ecryptfs_auth_tok * |
| 189 | ecryptfs_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 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 195 | #define ECRYPTFS_MAX_KEYSET_SIZE 1024 |
| 196 | #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 |
| 197 | #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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 */ |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 202 | #define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64)) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 203 | #define ECRYPTFS_DEFAULT_CIPHER "aes" |
| 204 | #define ECRYPTFS_DEFAULT_KEY_BYTES 16 |
Michael Halcrow | 565d9724 | 2006-10-30 22:07:17 -0800 | [diff] [blame] | 205 | #define ECRYPTFS_DEFAULT_HASH "md5" |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 206 | #define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 207 | #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 208 | #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C |
| 209 | #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 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 |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 214 | #define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename |
| 215 | * as dentry name */ |
| 216 | #define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in |
| 217 | * metadata */ |
| 218 | #define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as |
| 219 | * dentry name */ |
| 220 | #define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as |
| 221 | * metadata */ |
| 222 | /* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >= |
| 223 | * ECRYPTFS_MAX_IV_BYTES */ |
| 224 | #define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16 |
| 225 | #define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */ |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 226 | #define MD5_DIGEST_SIZE 16 |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 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) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 233 | |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 234 | struct ecryptfs_key_sig { |
| 235 | struct list_head crypt_stat_list; |
| 236 | char keysig[ECRYPTFS_SIG_SIZE_HEX]; |
| 237 | }; |
| 238 | |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 239 | struct 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 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 252 | /** |
| 253 | * This is the primary struct associated with each encrypted file. |
| 254 | * |
| 255 | * TODO: cache align/pack? |
| 256 | */ |
| 257 | struct ecryptfs_crypt_stat { |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 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 |
Tyler Hicks | e77cc8d | 2009-04-22 04:08:46 -0500 | [diff] [blame] | 272 | #define ECRYPTFS_UNLINK_SIGS 0x00004000 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 273 | u32 flags; |
| 274 | unsigned int file_version; |
| 275 | size_t iv_bytes; |
Tyler Hicks | fa3ef1c | 2010-02-11 05:09:14 -0600 | [diff] [blame] | 276 | size_t metadata_size; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 277 | size_t extent_size; /* Data extent size; default is 4096 */ |
| 278 | size_t key_size; |
| 279 | size_t extent_shift; |
| 280 | unsigned int extent_mask; |
| 281 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
Michael Halcrow | 8bba066 | 2006-10-30 22:07:18 -0800 | [diff] [blame] | 282 | struct crypto_blkcipher *tfm; |
Michael Halcrow | 565d9724 | 2006-10-30 22:07:17 -0800 | [diff] [blame] | 283 | struct crypto_hash *hash_tfm; /* Crypto context for generating |
| 284 | * the initialization vectors */ |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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]; |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 288 | struct list_head keysig_list; |
| 289 | struct mutex keysig_list_mutex; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 290 | struct mutex cs_tfm_mutex; |
Michael Halcrow | 565d9724 | 2006-10-30 22:07:17 -0800 | [diff] [blame] | 291 | struct mutex cs_hash_tfm_mutex; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 292 | struct mutex cs_mutex; |
| 293 | }; |
| 294 | |
| 295 | /* inode private data. */ |
| 296 | struct ecryptfs_inode_info { |
| 297 | struct inode vfs_inode; |
| 298 | struct inode *wii_inode; |
Michael Halcrow | da0102a | 2007-10-16 01:28:07 -0700 | [diff] [blame] | 299 | struct file *lower_file; |
| 300 | struct mutex lower_file_mutex; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 301 | struct ecryptfs_crypt_stat crypt_stat; |
| 302 | }; |
| 303 | |
| 304 | /* dentry private data. Each dentry must keep track of a lower |
| 305 | * vfsmount too. */ |
| 306 | struct ecryptfs_dentry_info { |
Josef "Jeff" Sipek | b65d34f | 2006-12-08 02:36:34 -0800 | [diff] [blame] | 307 | struct path lower_path; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 308 | struct ecryptfs_crypt_stat *crypt_stat; |
| 309 | }; |
| 310 | |
Michael Halcrow | 6c6f57f | 2007-10-16 01:28:01 -0700 | [diff] [blame] | 311 | /** |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 312 | * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint |
| 313 | * @flags: Status flags |
| 314 | * @mount_crypt_stat_list: These auth_toks hang off the mount-wide |
| 315 | * cryptographic context. Every time a new |
| 316 | * inode comes into existence, eCryptfs copies |
| 317 | * the auth_toks on that list to the set of |
| 318 | * auth_toks on the inode's crypt_stat |
| 319 | * @global_auth_tok_key: The key from the user's keyring for the sig |
| 320 | * @global_auth_tok: The key contents |
| 321 | * @sig: The key identifier |
| 322 | * |
Michael Halcrow | 6c6f57f | 2007-10-16 01:28:01 -0700 | [diff] [blame] | 323 | * ecryptfs_global_auth_tok structs refer to authentication token keys |
| 324 | * in the user keyring that apply to newly created files. A list of |
| 325 | * these objects hangs off of the mount_crypt_stat struct for any |
| 326 | * given eCryptfs mount. This struct maintains a reference to both the |
| 327 | * key contents and the key itself so that the key can be put on |
| 328 | * unmount. |
| 329 | */ |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 330 | struct ecryptfs_global_auth_tok { |
| 331 | #define ECRYPTFS_AUTH_TOK_INVALID 0x00000001 |
Tyler Hicks | 84814d6 | 2009-03-13 13:51:59 -0700 | [diff] [blame] | 332 | #define ECRYPTFS_AUTH_TOK_FNEK 0x00000002 |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 333 | u32 flags; |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 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]; |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 338 | }; |
| 339 | |
Michael Halcrow | 6c6f57f | 2007-10-16 01:28:01 -0700 | [diff] [blame] | 340 | /** |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 341 | * ecryptfs_key_tfm - Persistent key tfm |
| 342 | * @key_tfm: crypto API handle to the key |
| 343 | * @key_size: Key size in bytes |
| 344 | * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is |
| 345 | * using the persistent TFM at any point in time |
| 346 | * @key_tfm_list: Handle to hang this off the module-wide TFM list |
| 347 | * @cipher_name: String name for the cipher for this TFM |
| 348 | * |
Michael Halcrow | 6c6f57f | 2007-10-16 01:28:01 -0700 | [diff] [blame] | 349 | * Typically, eCryptfs will use the same ciphers repeatedly throughout |
| 350 | * the course of its operations. In order to avoid unnecessarily |
| 351 | * destroying and initializing the same cipher repeatedly, eCryptfs |
| 352 | * keeps a list of crypto API contexts around to use when needed. |
| 353 | */ |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 354 | struct ecryptfs_key_tfm { |
| 355 | struct crypto_blkcipher *key_tfm; |
| 356 | size_t key_size; |
| 357 | struct mutex key_tfm_mutex; |
Michael Halcrow | 45eaab7 | 2007-10-16 01:28:05 -0700 | [diff] [blame] | 358 | struct list_head key_tfm_list; |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 359 | unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; |
| 360 | }; |
| 361 | |
Eric Sandeen | af440f5 | 2008-02-06 01:38:37 -0800 | [diff] [blame] | 362 | extern struct mutex key_tfm_list_mutex; |
| 363 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 364 | /** |
| 365 | * This struct is to enable a mount-wide passphrase/salt combo. This |
| 366 | * is more or less a stopgap to provide similar functionality to other |
| 367 | * crypto filesystems like EncFS or CFS until full policy support is |
| 368 | * implemented in eCryptfs. |
| 369 | */ |
| 370 | struct ecryptfs_mount_crypt_stat { |
| 371 | /* Pointers to memory we do not own, do not free these */ |
| 372 | #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 |
Michael Halcrow | 1739895 | 2007-02-12 00:53:45 -0800 | [diff] [blame] | 373 | #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 |
| 374 | #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 375 | #define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008 |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 376 | #define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010 |
| 377 | #define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020 |
| 378 | #define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040 |
Roberto Sassu | f16feb5 | 2010-10-06 18:31:32 +0200 | [diff] [blame] | 379 | #define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 380 | u32 flags; |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 381 | struct list_head global_auth_tok_list; |
| 382 | struct mutex global_auth_tok_list_mutex; |
| 383 | size_t num_global_auth_toks; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 384 | size_t global_default_cipher_key_size; |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 385 | size_t global_default_fn_cipher_key_bytes; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 386 | unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE |
| 387 | + 1]; |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 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]; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 391 | }; |
| 392 | |
| 393 | /* superblock private data. */ |
| 394 | struct ecryptfs_sb_info { |
| 395 | struct super_block *wsi_sb; |
| 396 | struct ecryptfs_mount_crypt_stat mount_crypt_stat; |
Jens Axboe | 9df9c8b | 2010-04-22 12:22:04 +0200 | [diff] [blame] | 397 | struct backing_dev_info bdi; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 398 | }; |
| 399 | |
| 400 | /* file private data. */ |
| 401 | struct ecryptfs_file_info { |
| 402 | struct file *wfi_file; |
| 403 | struct ecryptfs_crypt_stat *crypt_stat; |
| 404 | }; |
| 405 | |
| 406 | /* auth_tok <=> encrypted_session_key mappings */ |
| 407 | struct 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 | |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 413 | struct ecryptfs_message { |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 414 | /* Can never be greater than ecryptfs_message_buf_len */ |
| 415 | /* Used to find the parent msg_ctx */ |
| 416 | /* Inherits from msg_ctx->index */ |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 417 | u32 index; |
| 418 | u32 data_len; |
| 419 | u8 data[]; |
| 420 | }; |
| 421 | |
| 422 | struct ecryptfs_msg_ctx { |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 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; |
| 434 | /* Counter converts to a sequence number. Each message sent |
| 435 | * out for which we expect a response has an associated |
| 436 | * sequence number. The response must have the same sequence |
| 437 | * number as the counter for the msg_stc for the message to be |
| 438 | * valid. */ |
| 439 | u32 counter; |
| 440 | size_t msg_size; |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 441 | struct ecryptfs_message *msg; |
| 442 | struct task_struct *task; |
| 443 | struct list_head node; |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 444 | struct list_head daemon_out_list; |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 445 | struct mutex mux; |
| 446 | }; |
| 447 | |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 448 | struct ecryptfs_daemon; |
| 449 | |
| 450 | struct 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; |
Michael Halcrow | 6a3fd92 | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 457 | struct pid *pid; |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 458 | uid_t euid; |
Michael Halcrow | 6a3fd92 | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 459 | struct user_namespace *user_ns; |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 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; |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 465 | }; |
| 466 | |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 467 | extern struct mutex ecryptfs_daemon_hash_mux; |
| 468 | |
Tyler Hicks | 157f107 | 2010-02-11 07:10:38 -0600 | [diff] [blame] | 469 | static inline size_t |
| 470 | ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat) |
| 471 | { |
| 472 | if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) |
| 473 | return 0; |
Tyler Hicks | fa3ef1c | 2010-02-11 05:09:14 -0600 | [diff] [blame] | 474 | return crypt_stat->metadata_size; |
Tyler Hicks | 157f107 | 2010-02-11 07:10:38 -0600 | [diff] [blame] | 475 | } |
| 476 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 477 | static inline struct ecryptfs_file_info * |
| 478 | ecryptfs_file_to_private(struct file *file) |
| 479 | { |
Joe Perches | 0c6d7d5 | 2010-09-04 18:52:48 -0700 | [diff] [blame] | 480 | return file->private_data; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | static inline void |
| 484 | ecryptfs_set_file_private(struct file *file, |
| 485 | struct ecryptfs_file_info *file_info) |
| 486 | { |
| 487 | file->private_data = file_info; |
| 488 | } |
| 489 | |
| 490 | static inline struct file *ecryptfs_file_to_lower(struct file *file) |
| 491 | { |
| 492 | return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; |
| 493 | } |
| 494 | |
| 495 | static inline void |
| 496 | ecryptfs_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 | |
| 502 | static inline struct ecryptfs_inode_info * |
| 503 | ecryptfs_inode_to_private(struct inode *inode) |
| 504 | { |
| 505 | return container_of(inode, struct ecryptfs_inode_info, vfs_inode); |
| 506 | } |
| 507 | |
| 508 | static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) |
| 509 | { |
| 510 | return ecryptfs_inode_to_private(inode)->wii_inode; |
| 511 | } |
| 512 | |
| 513 | static inline void |
| 514 | ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) |
| 515 | { |
| 516 | ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; |
| 517 | } |
| 518 | |
| 519 | static inline struct ecryptfs_sb_info * |
| 520 | ecryptfs_superblock_to_private(struct super_block *sb) |
| 521 | { |
| 522 | return (struct ecryptfs_sb_info *)sb->s_fs_info; |
| 523 | } |
| 524 | |
| 525 | static inline void |
| 526 | ecryptfs_set_superblock_private(struct super_block *sb, |
| 527 | struct ecryptfs_sb_info *sb_info) |
| 528 | { |
| 529 | sb->s_fs_info = sb_info; |
| 530 | } |
| 531 | |
| 532 | static inline struct super_block * |
| 533 | ecryptfs_superblock_to_lower(struct super_block *sb) |
| 534 | { |
| 535 | return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; |
| 536 | } |
| 537 | |
| 538 | static inline void |
| 539 | ecryptfs_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 | |
| 545 | static inline struct ecryptfs_dentry_info * |
| 546 | ecryptfs_dentry_to_private(struct dentry *dentry) |
| 547 | { |
| 548 | return (struct ecryptfs_dentry_info *)dentry->d_fsdata; |
| 549 | } |
| 550 | |
| 551 | static inline void |
| 552 | ecryptfs_set_dentry_private(struct dentry *dentry, |
| 553 | struct ecryptfs_dentry_info *dentry_info) |
| 554 | { |
| 555 | dentry->d_fsdata = dentry_info; |
| 556 | } |
| 557 | |
| 558 | static inline struct dentry * |
| 559 | ecryptfs_dentry_to_lower(struct dentry *dentry) |
| 560 | { |
Josef "Jeff" Sipek | b65d34f | 2006-12-08 02:36:34 -0800 | [diff] [blame] | 561 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 562 | } |
| 563 | |
| 564 | static inline void |
| 565 | ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) |
| 566 | { |
Josef "Jeff" Sipek | b65d34f | 2006-12-08 02:36:34 -0800 | [diff] [blame] | 567 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry = |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 568 | lower_dentry; |
| 569 | } |
| 570 | |
| 571 | static inline struct vfsmount * |
| 572 | ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) |
| 573 | { |
Josef "Jeff" Sipek | b65d34f | 2006-12-08 02:36:34 -0800 | [diff] [blame] | 574 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | static inline void |
| 578 | ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) |
| 579 | { |
Josef "Jeff" Sipek | b65d34f | 2006-12-08 02:36:34 -0800 | [diff] [blame] | 580 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt = |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 581 | lower_mnt; |
| 582 | } |
| 583 | |
| 584 | #define ecryptfs_printk(type, fmt, arg...) \ |
Harvey Harrison | 18d1dbf | 2008-04-29 00:59:48 -0700 | [diff] [blame] | 585 | __ecryptfs_printk(type "%s: " fmt, __func__, ## arg); |
Joe Perches | 888d57b | 2010-11-10 15:46:16 -0800 | [diff] [blame] | 586 | __attribute__ ((format(printf, 1, 2))) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 587 | void __ecryptfs_printk(const char *fmt, ...); |
| 588 | |
| 589 | extern const struct file_operations ecryptfs_main_fops; |
| 590 | extern const struct file_operations ecryptfs_dir_fops; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 591 | extern const struct inode_operations ecryptfs_main_iops; |
| 592 | extern const struct inode_operations ecryptfs_dir_iops; |
| 593 | extern const struct inode_operations ecryptfs_symlink_iops; |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 594 | extern const struct super_operations ecryptfs_sops; |
Al Viro | 5a3fd05 | 2009-02-20 05:57:52 +0000 | [diff] [blame] | 595 | extern const struct dentry_operations ecryptfs_dops; |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 596 | extern const struct address_space_operations ecryptfs_aops; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 597 | extern int ecryptfs_verbosity; |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 598 | extern unsigned int ecryptfs_message_buf_len; |
| 599 | extern signed long ecryptfs_message_wait_timeout; |
| 600 | extern unsigned int ecryptfs_number_of_users; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 601 | |
| 602 | extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; |
| 603 | extern struct kmem_cache *ecryptfs_file_info_cache; |
| 604 | extern struct kmem_cache *ecryptfs_dentry_info_cache; |
| 605 | extern struct kmem_cache *ecryptfs_inode_info_cache; |
| 606 | extern struct kmem_cache *ecryptfs_sb_info_cache; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 607 | extern struct kmem_cache *ecryptfs_header_cache_1; |
| 608 | extern struct kmem_cache *ecryptfs_header_cache_2; |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 609 | extern struct kmem_cache *ecryptfs_xattr_cache; |
Michael Halcrow | eb95e7f | 2007-02-16 01:28:40 -0800 | [diff] [blame] | 610 | extern struct kmem_cache *ecryptfs_key_record_cache; |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 611 | extern struct kmem_cache *ecryptfs_key_sig_cache; |
| 612 | extern struct kmem_cache *ecryptfs_global_auth_tok_cache; |
| 613 | extern struct kmem_cache *ecryptfs_key_tfm_cache; |
Michael Halcrow | 746f1e5 | 2008-07-23 21:30:02 -0700 | [diff] [blame] | 614 | extern struct kmem_cache *ecryptfs_open_req_cache; |
| 615 | |
| 616 | struct 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 | }; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 628 | |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 629 | #define ECRYPTFS_INTERPOSE_FLAG_D_ADD 0x00000001 |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 630 | int ecryptfs_interpose(struct dentry *hidden_dentry, |
| 631 | struct dentry *this_dentry, struct super_block *sb, |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 632 | u32 flags); |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 633 | int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, |
| 634 | struct dentry *lower_dentry, |
Tyler Hicks | 70b8902 | 2011-02-17 17:35:20 -0600 | [diff] [blame] | 635 | struct inode *ecryptfs_dir_inode); |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 636 | int 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); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 640 | int ecryptfs_fill_zeros(struct file *file, loff_t new_length); |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 641 | int 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); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 647 | struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 648 | void ecryptfs_dump_hex(char *data, int bytes); |
| 649 | int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, |
| 650 | int sg_size); |
| 651 | int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); |
| 652 | void ecryptfs_rotate_iv(unsigned char *iv); |
| 653 | void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
Michael Halcrow | fcd1283 | 2007-10-16 01:28:01 -0700 | [diff] [blame] | 654 | void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
| 655 | void ecryptfs_destroy_mount_crypt_stat( |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 656 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat); |
| 657 | int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); |
Michael Halcrow | b6c1d8f | 2007-10-16 01:28:13 -0700 | [diff] [blame] | 658 | int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode); |
Michael Halcrow | 0216f7f | 2007-10-16 01:28:08 -0700 | [diff] [blame] | 659 | int ecryptfs_encrypt_page(struct page *page); |
| 660 | int ecryptfs_decrypt_page(struct page *page); |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 661 | int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry); |
| 662 | int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 663 | int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); |
Tyler Hicks | f4e60e6 | 2010-02-11 00:02:32 -0600 | [diff] [blame] | 664 | void ecryptfs_write_crypt_stat_flags(char *page_virt, |
| 665 | struct ecryptfs_crypt_stat *crypt_stat, |
| 666 | size_t *written); |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 667 | int ecryptfs_read_and_validate_header_region(char *data, |
| 668 | struct inode *ecryptfs_inode); |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 669 | int ecryptfs_read_and_validate_xattr_region(char *page_virt, |
| 670 | struct dentry *ecryptfs_dentry); |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 671 | u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes); |
Trevor Highland | 19e66a6 | 2008-02-06 01:38:36 -0800 | [diff] [blame] | 672 | int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 673 | void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); |
| 674 | int 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); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 678 | int |
| 679 | ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, |
| 680 | unsigned char *src, struct dentry *ecryptfs_dentry); |
| 681 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 682 | int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); |
| 683 | int ecryptfs_inode_set(struct inode *inode, void *lower_inode); |
| 684 | void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 685 | ssize_t |
| 686 | ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, |
| 687 | void *value, size_t size); |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 688 | int |
| 689 | ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, |
| 690 | size_t size, int flags); |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 691 | int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode); |
Tyler Hicks | 624ae52 | 2008-10-15 22:02:51 -0700 | [diff] [blame] | 692 | int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns, |
| 693 | struct pid *pid); |
Michael Halcrow | 6a3fd92 | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 694 | int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns, |
| 695 | struct pid *pid); |
| 696 | int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid, |
| 697 | struct user_namespace *user_ns, struct pid *pid, |
| 698 | u32 seq); |
Tyler Hicks | 624ae52 | 2008-10-15 22:02:51 -0700 | [diff] [blame] | 699 | int ecryptfs_send_message(char *data, int data_len, |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 700 | struct ecryptfs_msg_ctx **msg_ctx); |
| 701 | int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, |
| 702 | struct ecryptfs_message **emsg); |
Tyler Hicks | 624ae52 | 2008-10-15 22:02:51 -0700 | [diff] [blame] | 703 | int ecryptfs_init_messaging(void); |
| 704 | void ecryptfs_release_messaging(void); |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 705 | |
Michael Halcrow | e77a56d | 2007-02-12 00:53:47 -0800 | [diff] [blame] | 706 | void |
| 707 | ecryptfs_write_header_metadata(char *virt, |
| 708 | struct ecryptfs_crypt_stat *crypt_stat, |
| 709 | size_t *written); |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 710 | int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig); |
| 711 | int |
| 712 | ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
Tyler Hicks | 84814d6 | 2009-03-13 13:51:59 -0700 | [diff] [blame] | 713 | char *sig, u32 global_auth_tok_flags); |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 714 | int 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); |
| 717 | int |
| 718 | ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, |
| 719 | size_t key_size); |
| 720 | int ecryptfs_init_crypto(void); |
Michael Halcrow | fcd1283 | 2007-10-16 01:28:01 -0700 | [diff] [blame] | 721 | int ecryptfs_destroy_crypto(void); |
Eric Sandeen | af440f5 | 2008-02-06 01:38:37 -0800 | [diff] [blame] | 722 | int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm); |
Michael Halcrow | f4aad16 | 2007-10-16 01:27:53 -0700 | [diff] [blame] | 723 | int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm, |
| 724 | struct mutex **tfm_mutex, |
| 725 | char *cipher_name); |
| 726 | int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, |
| 727 | struct ecryptfs_auth_tok **auth_tok, |
| 728 | char *sig); |
Michael Halcrow | da0102a | 2007-10-16 01:28:07 -0700 | [diff] [blame] | 729 | int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data, |
| 730 | loff_t offset, size_t size); |
| 731 | int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, |
| 732 | struct page *page_for_lower, |
| 733 | size_t offset_in_page, size_t size); |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 734 | int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size); |
Michael Halcrow | da0102a | 2007-10-16 01:28:07 -0700 | [diff] [blame] | 735 | int ecryptfs_read_lower(char *data, loff_t offset, size_t size, |
| 736 | struct inode *ecryptfs_inode); |
| 737 | int 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); |
Al Viro | 02bd979 | 2010-05-21 11:02:14 -0400 | [diff] [blame] | 741 | struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index); |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 742 | int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon); |
Michael Halcrow | 6a3fd92 | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 743 | int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid, |
| 744 | struct user_namespace *user_ns); |
Michael Halcrow | f66e883 | 2008-04-29 00:59:51 -0700 | [diff] [blame] | 745 | int ecryptfs_parse_packet_length(unsigned char *data, size_t *size, |
| 746 | size_t *length_size); |
| 747 | int ecryptfs_write_packet_length(char *dest, size_t size, |
| 748 | size_t *packet_size_length); |
| 749 | int ecryptfs_init_ecryptfs_miscdev(void); |
| 750 | void ecryptfs_destroy_ecryptfs_miscdev(void); |
| 751 | int 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); |
| 754 | void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx); |
| 755 | int |
Michael Halcrow | 6a3fd92 | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 756 | ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid, |
| 757 | struct user_namespace *user_ns, struct pid *pid); |
Michael Halcrow | 746f1e5 | 2008-07-23 21:30:02 -0700 | [diff] [blame] | 758 | int ecryptfs_init_kthread(void); |
| 759 | void ecryptfs_destroy_kthread(void); |
| 760 | int ecryptfs_privileged_open(struct file **lower_file, |
| 761 | struct dentry *lower_dentry, |
David Howells | 745ca24 | 2008-11-14 10:39:22 +1100 | [diff] [blame] | 762 | struct vfsmount *lower_mnt, |
| 763 | const struct cred *cred); |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 764 | int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry); |
Michael Halcrow | 9c79f34 | 2009-01-06 14:41:57 -0800 | [diff] [blame] | 765 | int |
| 766 | ecryptfs_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); |
| 770 | int |
| 771 | ecryptfs_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); |
Michael Halcrow | a34f60f | 2009-01-06 14:41:58 -0800 | [diff] [blame] | 775 | int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat, |
| 776 | loff_t offset); |
Michael Halcrow | 88b4a07 | 2007-02-12 00:53:43 -0800 | [diff] [blame] | 777 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 778 | #endif /* #ifndef ECRYPTFS_KERNEL_H */ |