708 lines
24 KiB
C
708 lines
24 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/**
|
|
* eCryptfs: Linux filesystem encryption layer
|
|
* Kernel declarations.
|
|
*
|
|
* Copyright (C) 1997-2003 Erez Zadok
|
|
* Copyright (C) 2001-2003 Stony Brook University
|
|
* Copyright (C) 2004-2008 International Business Machines Corp.
|
|
* Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
|
|
* Trevor S. Highland <trevor.highland@gmail.com>
|
|
* Tyler Hicks <code@tyhicks.com>
|
|
*/
|
|
|
|
#ifndef ECRYPTFS_KERNEL_H
|
|
#define ECRYPTFS_KERNEL_H
|
|
|
|
#include <crypto/skcipher.h>
|
|
#include <keys/user-type.h>
|
|
#include <keys/encrypted-type.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/fs_stack.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/hash.h>
|
|
#include <linux/nsproxy.h>
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/ecryptfs.h>
|
|
|
|
#define ECRYPTFS_DEFAULT_IV_BYTES 16
|
|
#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
|
|
#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
|
|
#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
|
|
#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
|
|
#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
|
|
#define ECRYPTFS_DEFAULT_NUM_USERS 4
|
|
#define ECRYPTFS_MAX_NUM_USERS 32768
|
|
#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
|
|
|
|
void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
|
|
static inline void
|
|
ecryptfs_to_hex(char *dst, char *src, size_t src_size)
|
|
{
|
|
char *end = bin2hex(dst, src, src_size);
|
|
*end = '\0';
|
|
}
|
|
|
|
extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
|
|
|
|
struct ecryptfs_key_record {
|
|
unsigned char type;
|
|
size_t enc_key_size;
|
|
unsigned char sig[ECRYPTFS_SIG_SIZE];
|
|
unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
|
|
};
|
|
|
|
struct ecryptfs_auth_tok_list {
|
|
struct ecryptfs_auth_tok *auth_tok;
|
|
struct list_head list;
|
|
};
|
|
|
|
struct ecryptfs_crypt_stat;
|
|
struct ecryptfs_mount_crypt_stat;
|
|
|
|
struct ecryptfs_page_crypt_context {
|
|
struct page *page;
|
|
#define ECRYPTFS_PREPARE_COMMIT_MODE 0
|
|
#define ECRYPTFS_WRITEPAGE_MODE 1
|
|
unsigned int mode;
|
|
union {
|
|
struct file *lower_file;
|
|
struct writeback_control *wbc;
|
|
} param;
|
|
};
|
|
|
|
#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
|
|
static inline struct ecryptfs_auth_tok *
|
|
ecryptfs_get_encrypted_key_payload_data(struct key *key)
|
|
{
|
|
struct encrypted_key_payload *payload;
|
|
|
|
if (key->type != &key_type_encrypted)
|
|
return NULL;
|
|
|
|
payload = key->payload.data[0];
|
|
if (!payload)
|
|
return ERR_PTR(-EKEYREVOKED);
|
|
|
|
return (struct ecryptfs_auth_tok *)payload->payload_data;
|
|
}
|
|
|
|
static inline struct key *ecryptfs_get_encrypted_key(char *sig)
|
|
{
|
|
return request_key(&key_type_encrypted, sig, NULL);
|
|
}
|
|
|
|
#else
|
|
static inline struct ecryptfs_auth_tok *
|
|
ecryptfs_get_encrypted_key_payload_data(struct key *key)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct key *ecryptfs_get_encrypted_key(char *sig)
|
|
{
|
|
return ERR_PTR(-ENOKEY);
|
|
}
|
|
|
|
#endif /* CONFIG_ENCRYPTED_KEYS */
|
|
|
|
static inline struct ecryptfs_auth_tok *
|
|
ecryptfs_get_key_payload_data(struct key *key)
|
|
{
|
|
struct ecryptfs_auth_tok *auth_tok;
|
|
struct user_key_payload *ukp;
|
|
|
|
auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
|
|
if (auth_tok)
|
|
return auth_tok;
|
|
|
|
ukp = user_key_payload_locked(key);
|
|
if (!ukp)
|
|
return ERR_PTR(-EKEYREVOKED);
|
|
|
|
return (struct ecryptfs_auth_tok *)ukp->data;
|
|
}
|
|
|
|
#define ECRYPTFS_MAX_KEYSET_SIZE 1024
|
|
#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 31
|
|
#define ECRYPTFS_MAX_NUM_ENC_KEYS 64
|
|
#define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */
|
|
#define ECRYPTFS_SALT_BYTES 2
|
|
#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
|
|
#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */
|
|
#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
|
|
#define ECRYPTFS_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \
|
|
+ MAGIC_ECRYPTFS_MARKER_SIZE_BYTES)
|
|
#define ECRYPTFS_DEFAULT_CIPHER "aes"
|
|
#define ECRYPTFS_DEFAULT_KEY_BYTES 16
|
|
#define ECRYPTFS_DEFAULT_HASH "md5"
|
|
#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
|
|
#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
|
|
#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
|
|
#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
|
|
#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
|
|
#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
|
|
#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
|
|
#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
|
|
#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename
|
|
* as dentry name */
|
|
#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in
|
|
* metadata */
|
|
#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as
|
|
* dentry name */
|
|
#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as
|
|
* metadata */
|
|
#define ECRYPTFS_MIN_PKT_LEN_SIZE 1 /* Min size to specify packet length */
|
|
#define ECRYPTFS_MAX_PKT_LEN_SIZE 2 /* Pass at least this many bytes to
|
|
* ecryptfs_parse_packet_length() and
|
|
* ecryptfs_write_packet_length()
|
|
*/
|
|
/* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >=
|
|
* ECRYPTFS_MAX_IV_BYTES */
|
|
#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
|
|
#define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */
|
|
#define MD5_DIGEST_SIZE 16
|
|
#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
|
|
#define ECRYPTFS_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \
|
|
+ ECRYPTFS_SIG_SIZE + 1 + 1)
|
|
#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \
|
|
+ ECRYPTFS_SIG_SIZE + 1 + 1)
|
|
#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
|
|
#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
|
|
#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
|
|
#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
|
|
#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
|
|
|
|
#ifdef CONFIG_ECRYPT_FS_MESSAGING
|
|
# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \
|
|
| ECRYPTFS_VERSIONING_PUBKEY)
|
|
#else
|
|
# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0
|
|
#endif
|
|
|
|
#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
|
|
| ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
|
|
| ECRYPTFS_VERSIONING_XATTR \
|
|
| ECRYPTFS_VERSIONING_MULTKEY \
|
|
| ECRYPTFS_VERSIONING_MASK_MESSAGING \
|
|
| ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
|
|
struct ecryptfs_key_sig {
|
|
struct list_head crypt_stat_list;
|
|
char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
|
|
};
|
|
|
|
struct ecryptfs_filename {
|
|
struct list_head crypt_stat_list;
|
|
#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
|
|
u32 flags;
|
|
u32 seq_no;
|
|
char *filename;
|
|
char *encrypted_filename;
|
|
size_t filename_size;
|
|
size_t encrypted_filename_size;
|
|
char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
|
|
char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
|
|
};
|
|
|
|
/**
|
|
* This is the primary struct associated with each encrypted file.
|
|
*
|
|
* TODO: cache align/pack?
|
|
*/
|
|
struct ecryptfs_crypt_stat {
|
|
#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
|
|
#define ECRYPTFS_POLICY_APPLIED 0x00000002
|
|
#define ECRYPTFS_ENCRYPTED 0x00000004
|
|
#define ECRYPTFS_SECURITY_WARNING 0x00000008
|
|
#define ECRYPTFS_ENABLE_HMAC 0x00000010
|
|
#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020
|
|
#define ECRYPTFS_KEY_VALID 0x00000040
|
|
#define ECRYPTFS_METADATA_IN_XATTR 0x00000080
|
|
#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100
|
|
#define ECRYPTFS_KEY_SET 0x00000200
|
|
#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400
|
|
#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800
|
|
#define ECRYPTFS_ENCFN_USE_FEK 0x00001000
|
|
#define ECRYPTFS_UNLINK_SIGS 0x00002000
|
|
#define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000
|
|
u32 flags;
|
|
unsigned int file_version;
|
|
size_t iv_bytes;
|
|
size_t metadata_size;
|
|
size_t extent_size; /* Data extent size; default is 4096 */
|
|
size_t key_size;
|
|
size_t extent_shift;
|
|
unsigned int extent_mask;
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
|
|
struct crypto_skcipher *tfm;
|
|
struct crypto_shash *hash_tfm; /* Crypto context for generating
|
|
* the initialization vectors */
|
|
unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
|
|
unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
|
|
unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
|
|
struct list_head keysig_list;
|
|
struct mutex keysig_list_mutex;
|
|
struct mutex cs_tfm_mutex;
|
|
struct mutex cs_mutex;
|
|
};
|
|
|
|
/* inode private data. */
|
|
struct ecryptfs_inode_info {
|
|
struct inode vfs_inode;
|
|
struct inode *wii_inode;
|
|
struct mutex lower_file_mutex;
|
|
atomic_t lower_file_count;
|
|
struct file *lower_file;
|
|
struct ecryptfs_crypt_stat crypt_stat;
|
|
};
|
|
|
|
/* dentry private data. Each dentry must keep track of a lower
|
|
* vfsmount too. */
|
|
struct ecryptfs_dentry_info {
|
|
struct path lower_path;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
/**
|
|
* ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint
|
|
* @flags: Status flags
|
|
* @mount_crypt_stat_list: These auth_toks hang off the mount-wide
|
|
* cryptographic context. Every time a new
|
|
* inode comes into existence, eCryptfs copies
|
|
* the auth_toks on that list to the set of
|
|
* auth_toks on the inode's crypt_stat
|
|
* @global_auth_tok_key: The key from the user's keyring for the sig
|
|
* @global_auth_tok: The key contents
|
|
* @sig: The key identifier
|
|
*
|
|
* ecryptfs_global_auth_tok structs refer to authentication token keys
|
|
* in the user keyring that apply to newly created files. A list of
|
|
* these objects hangs off of the mount_crypt_stat struct for any
|
|
* given eCryptfs mount. This struct maintains a reference to both the
|
|
* key contents and the key itself so that the key can be put on
|
|
* unmount.
|
|
*/
|
|
struct ecryptfs_global_auth_tok {
|
|
#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
|
|
#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
|
|
u32 flags;
|
|
struct list_head mount_crypt_stat_list;
|
|
struct key *global_auth_tok_key;
|
|
unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
|
|
};
|
|
|
|
/**
|
|
* ecryptfs_key_tfm - Persistent key tfm
|
|
* @key_tfm: crypto API handle to the key
|
|
* @key_size: Key size in bytes
|
|
* @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is
|
|
* using the persistent TFM at any point in time
|
|
* @key_tfm_list: Handle to hang this off the module-wide TFM list
|
|
* @cipher_name: String name for the cipher for this TFM
|
|
*
|
|
* Typically, eCryptfs will use the same ciphers repeatedly throughout
|
|
* the course of its operations. In order to avoid unnecessarily
|
|
* destroying and initializing the same cipher repeatedly, eCryptfs
|
|
* keeps a list of crypto API contexts around to use when needed.
|
|
*/
|
|
struct ecryptfs_key_tfm {
|
|
struct crypto_skcipher *key_tfm;
|
|
size_t key_size;
|
|
struct mutex key_tfm_mutex;
|
|
struct list_head key_tfm_list;
|
|
unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
|
|
};
|
|
|
|
extern struct mutex key_tfm_list_mutex;
|
|
|
|
/**
|
|
* This struct is to enable a mount-wide passphrase/salt combo. This
|
|
* is more or less a stopgap to provide similar functionality to other
|
|
* crypto filesystems like EncFS or CFS until full policy support is
|
|
* implemented in eCryptfs.
|
|
*/
|
|
struct ecryptfs_mount_crypt_stat {
|
|
/* Pointers to memory we do not own, do not free these */
|
|
#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
|
|
#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
|
|
#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
|
|
#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
|
|
#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
|
|
#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
|
|
#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
|
|
#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
|
|
u32 flags;
|
|
struct list_head global_auth_tok_list;
|
|
struct mutex global_auth_tok_list_mutex;
|
|
size_t global_default_cipher_key_size;
|
|
size_t global_default_fn_cipher_key_bytes;
|
|
unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
|
|
+ 1];
|
|
unsigned char global_default_fn_cipher_name[
|
|
ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
|
|
char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
|
|
};
|
|
|
|
/* superblock private data. */
|
|
struct ecryptfs_sb_info {
|
|
struct super_block *wsi_sb;
|
|
struct ecryptfs_mount_crypt_stat mount_crypt_stat;
|
|
};
|
|
|
|
/* file private data. */
|
|
struct ecryptfs_file_info {
|
|
struct file *wfi_file;
|
|
struct ecryptfs_crypt_stat *crypt_stat;
|
|
};
|
|
|
|
/* auth_tok <=> encrypted_session_key mappings */
|
|
struct ecryptfs_auth_tok_list_item {
|
|
unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
|
|
struct list_head list;
|
|
struct ecryptfs_auth_tok auth_tok;
|
|
};
|
|
|
|
struct ecryptfs_message {
|
|
/* Can never be greater than ecryptfs_message_buf_len */
|
|
/* Used to find the parent msg_ctx */
|
|
/* Inherits from msg_ctx->index */
|
|
u32 index;
|
|
u32 data_len;
|
|
u8 data[];
|
|
};
|
|
|
|
struct ecryptfs_msg_ctx {
|
|
#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
|
|
#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
|
|
#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
|
|
#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
|
|
u8 state;
|
|
#define ECRYPTFS_MSG_HELO 100
|
|
#define ECRYPTFS_MSG_QUIT 101
|
|
#define ECRYPTFS_MSG_REQUEST 102
|
|
#define ECRYPTFS_MSG_RESPONSE 103
|
|
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 {
|
|
#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 file *file;
|
|
struct mutex mux;
|
|
struct list_head msg_ctx_out_queue;
|
|
wait_queue_head_t wait;
|
|
struct hlist_node euid_chain;
|
|
};
|
|
|
|
#ifdef CONFIG_ECRYPT_FS_MESSAGING
|
|
extern struct mutex ecryptfs_daemon_hash_mux;
|
|
#endif
|
|
|
|
static inline size_t
|
|
ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
|
|
{
|
|
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
|
|
return 0;
|
|
return crypt_stat->metadata_size;
|
|
}
|
|
|
|
static inline struct ecryptfs_file_info *
|
|
ecryptfs_file_to_private(struct file *file)
|
|
{
|
|
return 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 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 const struct path *
|
|
ecryptfs_dentry_to_lower_path(struct dentry *dentry)
|
|
{
|
|
return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path;
|
|
}
|
|
|
|
#define ecryptfs_printk(type, fmt, arg...) \
|
|
__ecryptfs_printk(type "%s: " fmt, __func__, ## arg)
|
|
__printf(1, 2)
|
|
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 const 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;
|
|
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;
|
|
|
|
struct inode *ecryptfs_get_inode(struct inode *lower_inode,
|
|
struct super_block *sb);
|
|
void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);
|
|
int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
|
|
struct inode *ecryptfs_inode);
|
|
int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
|
|
size_t *decrypted_name_size,
|
|
struct super_block *sb,
|
|
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_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);
|
|
int 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,
|
|
struct inode *ecryptfs_inode);
|
|
int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
|
|
int ecryptfs_new_file_context(struct inode *ecryptfs_inode);
|
|
void ecryptfs_write_crypt_stat_flags(char *page_virt,
|
|
struct ecryptfs_crypt_stat *crypt_stat,
|
|
size_t *written);
|
|
int ecryptfs_read_and_validate_header_region(struct inode *inode);
|
|
int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
|
|
struct inode *inode);
|
|
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);
|
|
ssize_t
|
|
ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
|
|
const char *name, void *value, size_t size);
|
|
int
|
|
ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
|
|
const void *value, size_t size, int flags);
|
|
int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
|
|
#ifdef CONFIG_ECRYPT_FS_MESSAGING
|
|
int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
|
|
struct ecryptfs_message *msg, 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);
|
|
#else
|
|
static inline int ecryptfs_init_messaging(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ecryptfs_release_messaging(void)
|
|
{ }
|
|
static inline int ecryptfs_send_message(char *data, int data_len,
|
|
struct ecryptfs_msg_ctx **msg_ctx)
|
|
{
|
|
return -ENOTCONN;
|
|
}
|
|
static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
|
|
struct ecryptfs_message **emsg)
|
|
{
|
|
return -ENOMSG;
|
|
}
|
|
#endif
|
|
|
|
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_skcipher **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 inode *inode, 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 inode *inode, loff_t index);
|
|
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);
|
|
#ifdef CONFIG_ECRYPT_FS_MESSAGING
|
|
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, struct file *file);
|
|
int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
|
|
int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
|
|
#endif
|
|
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_get_lower_file(struct dentry *dentry, struct inode *inode);
|
|
void ecryptfs_put_lower_file(struct inode *inode);
|
|
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_set_f_namelen(long *namelen, long lower_namelen,
|
|
struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
|
|
int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
|
|
loff_t offset);
|
|
|
|
extern const struct xattr_handler *ecryptfs_xattr_handlers[];
|
|
|
|
#endif /* #ifndef ECRYPTFS_KERNEL_H */
|