766 строки
27 KiB
C
766 строки
27 KiB
C
/**
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* eCryptfs: Linux filesystem encryption layer
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* Kernel declarations.
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*
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* Copyright (C) 1997-2003 Erez Zadok
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* Copyright (C) 2001-2003 Stony Brook University
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* Copyright (C) 2004-2008 International Business Machines Corp.
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* Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
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* Trevor S. Highland <trevor.highland@gmail.com>
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* Tyler Hicks <tyhicks@ou.edu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef ECRYPTFS_KERNEL_H
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#define ECRYPTFS_KERNEL_H
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#include <keys/user-type.h>
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#include <linux/fs.h>
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#include <linux/fs_stack.h>
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#include <linux/namei.h>
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#include <linux/scatterlist.h>
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#include <linux/hash.h>
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#include <linux/nsproxy.h>
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/* Version verification for shared data structures w/ userspace */
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#define ECRYPTFS_VERSION_MAJOR 0x00
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#define ECRYPTFS_VERSION_MINOR 0x04
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#define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03
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/* These flags indicate which features are supported by the kernel
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* module; userspace tools such as the mount helper read
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* ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine
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* how to behave. */
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#define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001
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#define ECRYPTFS_VERSIONING_PUBKEY 0x00000002
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#define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004
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#define ECRYPTFS_VERSIONING_POLICY 0x00000008
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#define ECRYPTFS_VERSIONING_XATTR 0x00000010
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#define ECRYPTFS_VERSIONING_MULTKEY 0x00000020
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#define ECRYPTFS_VERSIONING_DEVMISC 0x00000040
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#define ECRYPTFS_VERSIONING_HMAC 0x00000080
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#define ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION 0x00000100
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#define ECRYPTFS_VERSIONING_GCM 0x00000200
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#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
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| ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
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| ECRYPTFS_VERSIONING_PUBKEY \
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| ECRYPTFS_VERSIONING_XATTR \
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| ECRYPTFS_VERSIONING_MULTKEY \
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| ECRYPTFS_VERSIONING_DEVMISC \
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| ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
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#define ECRYPTFS_MAX_PASSWORD_LENGTH 64
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#define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH
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#define ECRYPTFS_SALT_SIZE 8
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#define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2)
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/* The original signature size is only for what is stored on disk; all
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* in-memory representations are expanded hex, so it better adapted to
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* be passed around or referenced on the command line */
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#define ECRYPTFS_SIG_SIZE 8
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#define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2)
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#define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX
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#define ECRYPTFS_MAX_KEY_BYTES 64
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#define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512
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#define ECRYPTFS_DEFAULT_IV_BYTES 16
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#define ECRYPTFS_FILE_VERSION 0x03
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#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
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#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
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#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
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#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
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#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
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#define ECRYPTFS_MAX_PKI_NAME_BYTES 16
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#define ECRYPTFS_DEFAULT_NUM_USERS 4
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#define ECRYPTFS_MAX_NUM_USERS 32768
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#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
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#define RFC2440_CIPHER_DES3_EDE 0x02
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#define RFC2440_CIPHER_CAST_5 0x03
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#define RFC2440_CIPHER_BLOWFISH 0x04
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#define RFC2440_CIPHER_AES_128 0x07
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#define RFC2440_CIPHER_AES_192 0x08
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#define RFC2440_CIPHER_AES_256 0x09
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#define RFC2440_CIPHER_TWOFISH 0x0a
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#define RFC2440_CIPHER_CAST_6 0x0b
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#define RFC2440_CIPHER_RSA 0x01
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/**
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* For convenience, we may need to pass around the encrypted session
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* key between kernel and userspace because the authentication token
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* may not be extractable. For example, the TPM may not release the
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* private key, instead requiring the encrypted data and returning the
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* decrypted data.
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*/
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struct ecryptfs_session_key {
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#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001
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#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002
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#define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004
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#define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008
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u32 flags;
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u32 encrypted_key_size;
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u32 decrypted_key_size;
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u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
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u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES];
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};
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struct ecryptfs_password {
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u32 password_bytes;
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s32 hash_algo;
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u32 hash_iterations;
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u32 session_key_encryption_key_bytes;
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#define ECRYPTFS_PERSISTENT_PASSWORD 0x01
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#define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02
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u32 flags;
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/* Iterated-hash concatenation of salt and passphrase */
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u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES];
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u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
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/* Always in expanded hex */
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u8 salt[ECRYPTFS_SALT_SIZE];
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};
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enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY};
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struct ecryptfs_private_key {
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u32 key_size;
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u32 data_len;
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u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
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char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1];
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u8 data[];
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};
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/* May be a password or a private key */
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struct ecryptfs_auth_tok {
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u16 version; /* 8-bit major and 8-bit minor */
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u16 token_type;
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#define ECRYPTFS_ENCRYPT_ONLY 0x00000001
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u32 flags;
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struct ecryptfs_session_key session_key;
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u8 reserved[32];
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union {
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struct ecryptfs_password password;
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struct ecryptfs_private_key private_key;
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} token;
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} __attribute__ ((packed));
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void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
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extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
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extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
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struct ecryptfs_key_record {
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unsigned char type;
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size_t enc_key_size;
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unsigned char sig[ECRYPTFS_SIG_SIZE];
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unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
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};
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struct ecryptfs_auth_tok_list {
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struct ecryptfs_auth_tok *auth_tok;
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struct list_head list;
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};
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struct ecryptfs_crypt_stat;
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struct ecryptfs_mount_crypt_stat;
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struct ecryptfs_page_crypt_context {
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struct page *page;
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#define ECRYPTFS_PREPARE_COMMIT_MODE 0
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#define ECRYPTFS_WRITEPAGE_MODE 1
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unsigned int mode;
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union {
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struct file *lower_file;
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struct writeback_control *wbc;
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} param;
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};
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static inline struct ecryptfs_auth_tok *
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ecryptfs_get_key_payload_data(struct key *key)
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{
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return (struct ecryptfs_auth_tok *)
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(((struct user_key_payload*)key->payload.data)->data);
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}
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#define ECRYPTFS_SUPER_MAGIC 0xf15f
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#define ECRYPTFS_MAX_KEYSET_SIZE 1024
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#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32
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#define ECRYPTFS_MAX_NUM_ENC_KEYS 64
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#define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */
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#define ECRYPTFS_SALT_BYTES 2
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#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
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#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */
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#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
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#define ECRYPTFS_DEFAULT_CIPHER "aes"
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#define ECRYPTFS_DEFAULT_KEY_BYTES 16
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#define ECRYPTFS_DEFAULT_HASH "md5"
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#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
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#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
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#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
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#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
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#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
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#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
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#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
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#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
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#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename
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* as dentry name */
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#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in
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* metadata */
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#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as
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* dentry name */
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#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as
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* metadata */
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/* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >=
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* ECRYPTFS_MAX_IV_BYTES */
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#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
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#define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */
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#define MD5_DIGEST_SIZE 16
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#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
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#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
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#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
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#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
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#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
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#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
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struct ecryptfs_key_sig {
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struct list_head crypt_stat_list;
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char keysig[ECRYPTFS_SIG_SIZE_HEX];
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};
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struct ecryptfs_filename {
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struct list_head crypt_stat_list;
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#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
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u32 flags;
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u32 seq_no;
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char *filename;
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char *encrypted_filename;
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size_t filename_size;
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size_t encrypted_filename_size;
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char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
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char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
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};
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/**
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* This is the primary struct associated with each encrypted file.
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*
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* TODO: cache align/pack?
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*/
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struct ecryptfs_crypt_stat {
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#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
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#define ECRYPTFS_POLICY_APPLIED 0x00000002
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#define ECRYPTFS_NEW_FILE 0x00000004
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#define ECRYPTFS_ENCRYPTED 0x00000008
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#define ECRYPTFS_SECURITY_WARNING 0x00000010
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#define ECRYPTFS_ENABLE_HMAC 0x00000020
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#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040
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#define ECRYPTFS_KEY_VALID 0x00000080
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#define ECRYPTFS_METADATA_IN_XATTR 0x00000100
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#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200
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#define ECRYPTFS_KEY_SET 0x00000400
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#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000800
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#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00001000
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#define ECRYPTFS_ENCFN_USE_FEK 0x00002000
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u32 flags;
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unsigned int file_version;
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size_t iv_bytes;
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size_t num_header_bytes_at_front;
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size_t extent_size; /* Data extent size; default is 4096 */
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size_t key_size;
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size_t extent_shift;
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unsigned int extent_mask;
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
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struct crypto_blkcipher *tfm;
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struct crypto_hash *hash_tfm; /* Crypto context for generating
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* the initialization vectors */
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unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
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unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
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unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
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struct list_head keysig_list;
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struct mutex keysig_list_mutex;
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struct mutex cs_tfm_mutex;
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struct mutex cs_hash_tfm_mutex;
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struct mutex cs_mutex;
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};
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/* inode private data. */
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struct ecryptfs_inode_info {
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struct inode vfs_inode;
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struct inode *wii_inode;
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struct file *lower_file;
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struct mutex lower_file_mutex;
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struct ecryptfs_crypt_stat crypt_stat;
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};
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/* dentry private data. Each dentry must keep track of a lower
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* vfsmount too. */
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struct ecryptfs_dentry_info {
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struct path lower_path;
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struct ecryptfs_crypt_stat *crypt_stat;
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};
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/**
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* ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint
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* @flags: Status flags
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* @mount_crypt_stat_list: These auth_toks hang off the mount-wide
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* cryptographic context. Every time a new
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* inode comes into existence, eCryptfs copies
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* the auth_toks on that list to the set of
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* auth_toks on the inode's crypt_stat
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* @global_auth_tok_key: The key from the user's keyring for the sig
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* @global_auth_tok: The key contents
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* @sig: The key identifier
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*
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* ecryptfs_global_auth_tok structs refer to authentication token keys
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* in the user keyring that apply to newly created files. A list of
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* these objects hangs off of the mount_crypt_stat struct for any
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* given eCryptfs mount. This struct maintains a reference to both the
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* key contents and the key itself so that the key can be put on
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* unmount.
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*/
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struct ecryptfs_global_auth_tok {
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#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
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#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
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u32 flags;
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struct list_head mount_crypt_stat_list;
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struct key *global_auth_tok_key;
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struct ecryptfs_auth_tok *global_auth_tok;
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unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
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};
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/**
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* ecryptfs_key_tfm - Persistent key tfm
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* @key_tfm: crypto API handle to the key
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* @key_size: Key size in bytes
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* @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is
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* using the persistent TFM at any point in time
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* @key_tfm_list: Handle to hang this off the module-wide TFM list
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* @cipher_name: String name for the cipher for this TFM
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*
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* Typically, eCryptfs will use the same ciphers repeatedly throughout
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* the course of its operations. In order to avoid unnecessarily
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* destroying and initializing the same cipher repeatedly, eCryptfs
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* keeps a list of crypto API contexts around to use when needed.
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*/
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struct ecryptfs_key_tfm {
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struct crypto_blkcipher *key_tfm;
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size_t key_size;
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struct mutex key_tfm_mutex;
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struct list_head key_tfm_list;
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unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
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};
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extern struct mutex key_tfm_list_mutex;
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/**
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* This struct is to enable a mount-wide passphrase/salt combo. This
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* is more or less a stopgap to provide similar functionality to other
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* crypto filesystems like EncFS or CFS until full policy support is
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* implemented in eCryptfs.
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*/
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struct ecryptfs_mount_crypt_stat {
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/* Pointers to memory we do not own, do not free these */
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#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
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#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
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#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
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#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
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#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
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#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
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#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
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u32 flags;
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struct list_head global_auth_tok_list;
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struct mutex global_auth_tok_list_mutex;
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size_t num_global_auth_toks;
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size_t global_default_cipher_key_size;
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size_t global_default_fn_cipher_key_bytes;
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unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
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+ 1];
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unsigned char global_default_fn_cipher_name[
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ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
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char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
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};
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/* superblock private data. */
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struct ecryptfs_sb_info {
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struct super_block *wsi_sb;
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struct ecryptfs_mount_crypt_stat mount_crypt_stat;
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};
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/* file private data. */
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struct ecryptfs_file_info {
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struct file *wfi_file;
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struct ecryptfs_crypt_stat *crypt_stat;
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};
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/* auth_tok <=> encrypted_session_key mappings */
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struct ecryptfs_auth_tok_list_item {
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unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
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struct list_head list;
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struct ecryptfs_auth_tok auth_tok;
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};
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struct ecryptfs_message {
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/* Can never be greater than ecryptfs_message_buf_len */
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/* Used to find the parent msg_ctx */
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/* Inherits from msg_ctx->index */
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u32 index;
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u32 data_len;
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u8 data[];
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};
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struct ecryptfs_msg_ctx {
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#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
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#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
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#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
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#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
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u8 state;
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#define ECRYPTFS_MSG_HELO 100
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#define ECRYPTFS_MSG_QUIT 101
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#define ECRYPTFS_MSG_REQUEST 102
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#define ECRYPTFS_MSG_RESPONSE 103
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u8 type;
|
|
u32 index;
|
|
/* Counter converts to a sequence number. Each message sent
|
|
* out for which we expect a response has an associated
|
|
* sequence number. The response must have the same sequence
|
|
* number as the counter for the msg_stc for the message to be
|
|
* valid. */
|
|
u32 counter;
|
|
size_t msg_size;
|
|
struct ecryptfs_message *msg;
|
|
struct task_struct *task;
|
|
struct list_head node;
|
|
struct list_head daemon_out_list;
|
|
struct mutex mux;
|
|
};
|
|
|
|
struct ecryptfs_daemon;
|
|
|
|
struct ecryptfs_daemon {
|
|
#define ECRYPTFS_DAEMON_IN_READ 0x00000001
|
|
#define ECRYPTFS_DAEMON_IN_POLL 0x00000002
|
|
#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
|
|
#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
|
|
u32 flags;
|
|
u32 num_queued_msg_ctx;
|
|
struct pid *pid;
|
|
uid_t euid;
|
|
struct user_namespace *user_ns;
|
|
struct task_struct *task;
|
|
struct mutex mux;
|
|
struct list_head msg_ctx_out_queue;
|
|
wait_queue_head_t wait;
|
|
struct hlist_node euid_chain;
|
|
};
|
|
|
|
extern struct mutex ecryptfs_daemon_hash_mux;
|
|
|
|
static inline struct ecryptfs_file_info *
|
|
ecryptfs_file_to_private(struct file *file)
|
|
{
|
|
return (struct ecryptfs_file_info *)file->private_data;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_file_private(struct file *file,
|
|
struct ecryptfs_file_info *file_info)
|
|
{
|
|
file->private_data = file_info;
|
|
}
|
|
|
|
static inline struct file *ecryptfs_file_to_lower(struct file *file)
|
|
{
|
|
return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
|
|
{
|
|
((struct ecryptfs_file_info *)file->private_data)->wfi_file =
|
|
lower_file;
|
|
}
|
|
|
|
static inline struct ecryptfs_inode_info *
|
|
ecryptfs_inode_to_private(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
|
|
}
|
|
|
|
static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
|
|
{
|
|
return ecryptfs_inode_to_private(inode)->wii_inode;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
|
|
{
|
|
ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
|
|
}
|
|
|
|
static inline struct ecryptfs_sb_info *
|
|
ecryptfs_superblock_to_private(struct super_block *sb)
|
|
{
|
|
return (struct ecryptfs_sb_info *)sb->s_fs_info;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_superblock_private(struct super_block *sb,
|
|
struct ecryptfs_sb_info *sb_info)
|
|
{
|
|
sb->s_fs_info = sb_info;
|
|
}
|
|
|
|
static inline struct super_block *
|
|
ecryptfs_superblock_to_lower(struct super_block *sb)
|
|
{
|
|
return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_superblock_lower(struct super_block *sb,
|
|
struct super_block *lower_sb)
|
|
{
|
|
((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
|
|
}
|
|
|
|
static inline struct ecryptfs_dentry_info *
|
|
ecryptfs_dentry_to_private(struct dentry *dentry)
|
|
{
|
|
return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_dentry_private(struct dentry *dentry,
|
|
struct ecryptfs_dentry_info *dentry_info)
|
|
{
|
|
dentry->d_fsdata = dentry_info;
|
|
}
|
|
|
|
static inline struct dentry *
|
|
ecryptfs_dentry_to_lower(struct dentry *dentry)
|
|
{
|
|
return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
|
|
{
|
|
((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
|
|
lower_dentry;
|
|
}
|
|
|
|
static inline struct vfsmount *
|
|
ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
|
|
{
|
|
return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
|
|
}
|
|
|
|
static inline void
|
|
ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
|
|
{
|
|
((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
|
|
lower_mnt;
|
|
}
|
|
|
|
#define ecryptfs_printk(type, fmt, arg...) \
|
|
__ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
|
|
void __ecryptfs_printk(const char *fmt, ...);
|
|
|
|
extern const struct file_operations ecryptfs_main_fops;
|
|
extern const struct file_operations ecryptfs_dir_fops;
|
|
extern const struct inode_operations ecryptfs_main_iops;
|
|
extern const struct inode_operations ecryptfs_dir_iops;
|
|
extern const struct inode_operations ecryptfs_symlink_iops;
|
|
extern const struct super_operations ecryptfs_sops;
|
|
extern const struct dentry_operations ecryptfs_dops;
|
|
extern struct address_space_operations ecryptfs_aops;
|
|
extern int ecryptfs_verbosity;
|
|
extern unsigned int ecryptfs_message_buf_len;
|
|
extern signed long ecryptfs_message_wait_timeout;
|
|
extern unsigned int ecryptfs_number_of_users;
|
|
|
|
extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
|
|
extern struct kmem_cache *ecryptfs_file_info_cache;
|
|
extern struct kmem_cache *ecryptfs_dentry_info_cache;
|
|
extern struct kmem_cache *ecryptfs_inode_info_cache;
|
|
extern struct kmem_cache *ecryptfs_sb_info_cache;
|
|
extern struct kmem_cache *ecryptfs_header_cache_1;
|
|
extern struct kmem_cache *ecryptfs_header_cache_2;
|
|
extern struct kmem_cache *ecryptfs_xattr_cache;
|
|
extern struct kmem_cache *ecryptfs_key_record_cache;
|
|
extern struct kmem_cache *ecryptfs_key_sig_cache;
|
|
extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
|
|
extern struct kmem_cache *ecryptfs_key_tfm_cache;
|
|
extern struct kmem_cache *ecryptfs_open_req_cache;
|
|
|
|
struct ecryptfs_open_req {
|
|
#define ECRYPTFS_REQ_PROCESSED 0x00000001
|
|
#define ECRYPTFS_REQ_DROPPED 0x00000002
|
|
#define ECRYPTFS_REQ_ZOMBIE 0x00000004
|
|
u32 flags;
|
|
struct file **lower_file;
|
|
struct dentry *lower_dentry;
|
|
struct vfsmount *lower_mnt;
|
|
wait_queue_head_t wait;
|
|
struct mutex mux;
|
|
struct list_head kthread_ctl_list;
|
|
};
|
|
|
|
#define ECRYPTFS_INTERPOSE_FLAG_D_ADD 0x00000001
|
|
int ecryptfs_interpose(struct dentry *hidden_dentry,
|
|
struct dentry *this_dentry, struct super_block *sb,
|
|
u32 flags);
|
|
int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
|
|
struct dentry *lower_dentry,
|
|
struct inode *ecryptfs_dir_inode,
|
|
struct nameidata *ecryptfs_nd);
|
|
int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
|
|
size_t *decrypted_name_size,
|
|
struct dentry *ecryptfs_dentry,
|
|
const char *name, size_t name_size);
|
|
int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
|
|
int ecryptfs_encrypt_and_encode_filename(
|
|
char **encoded_name,
|
|
size_t *encoded_name_size,
|
|
struct ecryptfs_crypt_stat *crypt_stat,
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
|
|
const char *name, size_t name_size);
|
|
struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
|
|
void ecryptfs_dump_hex(char *data, int bytes);
|
|
int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
|
|
int sg_size);
|
|
int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
|
|
void ecryptfs_rotate_iv(unsigned char *iv);
|
|
void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
|
|
void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
|
|
void ecryptfs_destroy_mount_crypt_stat(
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
|
|
int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
|
|
int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
|
|
int ecryptfs_encrypt_page(struct page *page);
|
|
int ecryptfs_decrypt_page(struct page *page);
|
|
int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry);
|
|
int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
|
|
int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
|
|
int ecryptfs_read_and_validate_header_region(char *data,
|
|
struct inode *ecryptfs_inode);
|
|
int ecryptfs_read_and_validate_xattr_region(char *page_virt,
|
|
struct dentry *ecryptfs_dentry);
|
|
u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
|
|
int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
|
|
void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
|
|
int ecryptfs_generate_key_packet_set(char *dest_base,
|
|
struct ecryptfs_crypt_stat *crypt_stat,
|
|
struct dentry *ecryptfs_dentry,
|
|
size_t *len, size_t max);
|
|
int
|
|
ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
|
|
unsigned char *src, struct dentry *ecryptfs_dentry);
|
|
int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
|
|
int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode);
|
|
int ecryptfs_inode_set(struct inode *inode, void *lower_inode);
|
|
void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode);
|
|
ssize_t
|
|
ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
|
|
void *value, size_t size);
|
|
int
|
|
ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
|
|
size_t size, int flags);
|
|
int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
|
|
int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns,
|
|
struct pid *pid);
|
|
int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns,
|
|
struct pid *pid);
|
|
int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
|
|
struct user_namespace *user_ns, struct pid *pid,
|
|
u32 seq);
|
|
int ecryptfs_send_message(char *data, int data_len,
|
|
struct ecryptfs_msg_ctx **msg_ctx);
|
|
int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
|
|
struct ecryptfs_message **emsg);
|
|
int ecryptfs_init_messaging(void);
|
|
void ecryptfs_release_messaging(void);
|
|
|
|
void
|
|
ecryptfs_write_header_metadata(char *virt,
|
|
struct ecryptfs_crypt_stat *crypt_stat,
|
|
size_t *written);
|
|
int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
|
|
int
|
|
ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
|
|
char *sig, u32 global_auth_tok_flags);
|
|
int ecryptfs_get_global_auth_tok_for_sig(
|
|
struct ecryptfs_global_auth_tok **global_auth_tok,
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
|
|
int
|
|
ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
|
|
size_t key_size);
|
|
int ecryptfs_init_crypto(void);
|
|
int ecryptfs_destroy_crypto(void);
|
|
int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
|
|
int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm,
|
|
struct mutex **tfm_mutex,
|
|
char *cipher_name);
|
|
int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
|
|
struct ecryptfs_auth_tok **auth_tok,
|
|
char *sig);
|
|
int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
|
|
loff_t offset, size_t size);
|
|
int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
|
|
struct page *page_for_lower,
|
|
size_t offset_in_page, size_t size);
|
|
int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
|
|
size_t size);
|
|
int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
|
|
struct inode *ecryptfs_inode);
|
|
int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
|
|
pgoff_t page_index,
|
|
size_t offset_in_page, size_t size,
|
|
struct inode *ecryptfs_inode);
|
|
struct page *ecryptfs_get_locked_page(struct file *file, loff_t index);
|
|
int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
|
|
int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid,
|
|
struct user_namespace *user_ns);
|
|
int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
|
|
size_t *length_size);
|
|
int ecryptfs_write_packet_length(char *dest, size_t size,
|
|
size_t *packet_size_length);
|
|
int ecryptfs_init_ecryptfs_miscdev(void);
|
|
void ecryptfs_destroy_ecryptfs_miscdev(void);
|
|
int ecryptfs_send_miscdev(char *data, size_t data_size,
|
|
struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
|
|
u16 msg_flags, struct ecryptfs_daemon *daemon);
|
|
void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
|
|
int
|
|
ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid,
|
|
struct user_namespace *user_ns, struct pid *pid);
|
|
int ecryptfs_init_kthread(void);
|
|
void ecryptfs_destroy_kthread(void);
|
|
int ecryptfs_privileged_open(struct file **lower_file,
|
|
struct dentry *lower_dentry,
|
|
struct vfsmount *lower_mnt,
|
|
const struct cred *cred);
|
|
int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry);
|
|
int
|
|
ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
|
|
size_t *packet_size,
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
|
|
char *filename, size_t filename_size);
|
|
int
|
|
ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
|
|
size_t *packet_size,
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
|
|
char *data, size_t max_packet_size);
|
|
int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
|
|
loff_t offset);
|
|
|
|
#endif /* #ifndef ECRYPTFS_KERNEL_H */
|