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707 lines
24 KiB
707 lines
24 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/** |
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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 <[email protected]> |
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* Trevor S. Highland <[email protected]> |
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* Tyler Hicks <[email protected]> |
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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 <crypto/skcipher.h> |
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#include <keys/user-type.h> |
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#include <keys/encrypted-type.h> |
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#include <linux/kernel.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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#include <linux/backing-dev.h> |
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#include <linux/ecryptfs.h> |
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#define ECRYPTFS_DEFAULT_IV_BYTES 16 |
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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_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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void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); |
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static inline void |
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ecryptfs_to_hex(char *dst, char *src, size_t src_size) |
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{ |
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char *end = bin2hex(dst, src, src_size); |
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*end = '\0'; |
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} |
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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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#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE) |
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static inline struct ecryptfs_auth_tok * |
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ecryptfs_get_encrypted_key_payload_data(struct key *key) |
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{ |
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struct encrypted_key_payload *payload; |
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if (key->type != &key_type_encrypted) |
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return NULL; |
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payload = key->payload.data[0]; |
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if (!payload) |
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return ERR_PTR(-EKEYREVOKED); |
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return (struct ecryptfs_auth_tok *)payload->payload_data; |
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} |
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static inline struct key *ecryptfs_get_encrypted_key(char *sig) |
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{ |
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return request_key(&key_type_encrypted, sig, NULL); |
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} |
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#else |
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static inline struct ecryptfs_auth_tok * |
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ecryptfs_get_encrypted_key_payload_data(struct key *key) |
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{ |
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return NULL; |
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} |
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static inline struct key *ecryptfs_get_encrypted_key(char *sig) |
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{ |
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return ERR_PTR(-ENOKEY); |
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} |
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#endif /* CONFIG_ENCRYPTED_KEYS */ |
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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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struct ecryptfs_auth_tok *auth_tok; |
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struct user_key_payload *ukp; |
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auth_tok = ecryptfs_get_encrypted_key_payload_data(key); |
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if (auth_tok) |
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return auth_tok; |
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ukp = user_key_payload_locked(key); |
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if (!ukp) |
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return ERR_PTR(-EKEYREVOKED); |
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return (struct ecryptfs_auth_tok *)ukp->data; |
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} |
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#define ECRYPTFS_MAX_KEYSET_SIZE 1024 |
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#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 31 |
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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_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \ |
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+ MAGIC_ECRYPTFS_MARKER_SIZE_BYTES) |
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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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#define ECRYPTFS_MIN_PKT_LEN_SIZE 1 /* Min size to specify packet length */ |
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#define ECRYPTFS_MAX_PKT_LEN_SIZE 2 /* Pass at least this many bytes to |
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* ecryptfs_parse_packet_length() and |
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* ecryptfs_write_packet_length() |
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*/ |
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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_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \ |
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+ ECRYPTFS_SIG_SIZE + 1 + 1) |
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#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \ |
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+ ECRYPTFS_SIG_SIZE + 1 + 1) |
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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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#ifdef CONFIG_ECRYPT_FS_MESSAGING |
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# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \ |
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| ECRYPTFS_VERSIONING_PUBKEY) |
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#else |
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# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0 |
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#endif |
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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_XATTR \ |
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| ECRYPTFS_VERSIONING_MULTKEY \ |
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| ECRYPTFS_VERSIONING_MASK_MESSAGING \ |
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| ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION) |
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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 + 1]; |
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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_ENCRYPTED 0x00000004 |
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#define ECRYPTFS_SECURITY_WARNING 0x00000008 |
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#define ECRYPTFS_ENABLE_HMAC 0x00000010 |
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#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020 |
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#define ECRYPTFS_KEY_VALID 0x00000040 |
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#define ECRYPTFS_METADATA_IN_XATTR 0x00000080 |
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#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100 |
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#define ECRYPTFS_KEY_SET 0x00000200 |
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#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400 |
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#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800 |
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#define ECRYPTFS_ENCFN_USE_FEK 0x00001000 |
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#define ECRYPTFS_UNLINK_SIGS 0x00002000 |
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#define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000 |
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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 metadata_size; |
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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_skcipher *tfm; |
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struct crypto_shash *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 + 1]; |
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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_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 mutex lower_file_mutex; |
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atomic_t lower_file_count; |
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struct file *lower_file; |
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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 rcu_head rcu; |
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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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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_skcipher *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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#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080 |
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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 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; |
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u32 index; |
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/* Counter converts to a sequence number. Each message sent |
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* out for which we expect a response has an associated |
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* sequence number. The response must have the same sequence |
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* number as the counter for the msg_stc for the message to be |
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* valid. */ |
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u32 counter; |
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size_t msg_size; |
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struct ecryptfs_message *msg; |
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struct task_struct *task; |
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struct list_head node; |
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struct list_head daemon_out_list; |
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struct mutex mux; |
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}; |
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struct ecryptfs_daemon { |
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#define ECRYPTFS_DAEMON_IN_READ 0x00000001 |
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#define ECRYPTFS_DAEMON_IN_POLL 0x00000002 |
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#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004 |
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#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008 |
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u32 flags; |
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u32 num_queued_msg_ctx; |
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struct file *file; |
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struct mutex mux; |
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struct list_head msg_ctx_out_queue; |
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wait_queue_head_t wait; |
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struct hlist_node euid_chain; |
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}; |
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#ifdef CONFIG_ECRYPT_FS_MESSAGING |
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extern struct mutex ecryptfs_daemon_hash_mux; |
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#endif |
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static inline size_t |
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ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat) |
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{ |
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if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) |
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return 0; |
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return crypt_stat->metadata_size; |
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} |
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static inline struct ecryptfs_file_info * |
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ecryptfs_file_to_private(struct file *file) |
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{ |
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return file->private_data; |
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} |
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static inline void |
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ecryptfs_set_file_private(struct file *file, |
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struct ecryptfs_file_info *file_info) |
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{ |
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file->private_data = file_info; |
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} |
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static inline struct file *ecryptfs_file_to_lower(struct file *file) |
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{ |
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return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; |
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} |
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static inline void |
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ecryptfs_set_file_lower(struct file *file, struct file *lower_file) |
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{ |
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((struct ecryptfs_file_info *)file->private_data)->wfi_file = |
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lower_file; |
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} |
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static inline struct ecryptfs_inode_info * |
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ecryptfs_inode_to_private(struct inode *inode) |
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{ |
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return container_of(inode, struct ecryptfs_inode_info, vfs_inode); |
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} |
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static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) |
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{ |
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return ecryptfs_inode_to_private(inode)->wii_inode; |
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} |
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static inline void |
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ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) |
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{ |
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ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; |
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} |
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static inline struct ecryptfs_sb_info * |
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ecryptfs_superblock_to_private(struct super_block *sb) |
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{ |
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return (struct ecryptfs_sb_info *)sb->s_fs_info; |
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} |
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static inline void |
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ecryptfs_set_superblock_private(struct super_block *sb, |
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struct ecryptfs_sb_info *sb_info) |
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{ |
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sb->s_fs_info = sb_info; |
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} |
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static inline struct super_block * |
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ecryptfs_superblock_to_lower(struct super_block *sb) |
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{ |
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return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; |
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} |
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static inline void |
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ecryptfs_set_superblock_lower(struct super_block *sb, |
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struct super_block *lower_sb) |
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{ |
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((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; |
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} |
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static inline void |
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ecryptfs_set_dentry_private(struct dentry *dentry, |
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struct ecryptfs_dentry_info *dentry_info) |
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{ |
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dentry->d_fsdata = dentry_info; |
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} |
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static inline struct dentry * |
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ecryptfs_dentry_to_lower(struct dentry *dentry) |
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{ |
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return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; |
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} |
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static inline struct path * |
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ecryptfs_dentry_to_lower_path(struct dentry *dentry) |
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{ |
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return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path; |
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} |
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#define ecryptfs_printk(type, fmt, arg...) \ |
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__ecryptfs_printk(type "%s: " fmt, __func__, ## arg) |
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__printf(1, 2) |
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void __ecryptfs_printk(const char *fmt, ...); |
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extern const struct file_operations ecryptfs_main_fops; |
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extern const struct file_operations ecryptfs_dir_fops; |
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extern const struct inode_operations ecryptfs_main_iops; |
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extern const struct inode_operations ecryptfs_dir_iops; |
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extern const struct inode_operations ecryptfs_symlink_iops; |
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extern const struct super_operations ecryptfs_sops; |
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extern const struct dentry_operations ecryptfs_dops; |
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extern const struct address_space_operations ecryptfs_aops; |
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extern int ecryptfs_verbosity; |
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extern unsigned int ecryptfs_message_buf_len; |
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extern signed long ecryptfs_message_wait_timeout; |
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extern unsigned int ecryptfs_number_of_users; |
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extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; |
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extern struct kmem_cache *ecryptfs_file_info_cache; |
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extern struct kmem_cache *ecryptfs_dentry_info_cache; |
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extern struct kmem_cache *ecryptfs_inode_info_cache; |
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extern struct kmem_cache *ecryptfs_sb_info_cache; |
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extern struct kmem_cache *ecryptfs_header_cache; |
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extern struct kmem_cache *ecryptfs_xattr_cache; |
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extern struct kmem_cache *ecryptfs_key_record_cache; |
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extern struct kmem_cache *ecryptfs_key_sig_cache; |
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extern struct kmem_cache *ecryptfs_global_auth_tok_cache; |
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extern struct kmem_cache *ecryptfs_key_tfm_cache; |
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struct inode *ecryptfs_get_inode(struct inode *lower_inode, |
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struct super_block *sb); |
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void ecryptfs_i_size_init(const char *page_virt, struct inode *inode); |
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int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry, |
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struct inode *ecryptfs_inode); |
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int ecryptfs_decode_and_decrypt_filename(char **decrypted_name, |
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size_t *decrypted_name_size, |
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struct super_block *sb, |
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const char *name, size_t name_size); |
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int ecryptfs_fill_zeros(struct file *file, loff_t new_length); |
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int ecryptfs_encrypt_and_encode_filename( |
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char **encoded_name, |
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size_t *encoded_name_size, |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
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const char *name, size_t name_size); |
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struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); |
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void ecryptfs_dump_hex(char *data, int bytes); |
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int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, |
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int sg_size); |
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int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); |
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void ecryptfs_rotate_iv(unsigned char *iv); |
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int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
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void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
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void ecryptfs_destroy_mount_crypt_stat( |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat); |
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int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); |
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int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode); |
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int ecryptfs_encrypt_page(struct page *page); |
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int ecryptfs_decrypt_page(struct page *page); |
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int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, |
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struct inode *ecryptfs_inode); |
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int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry); |
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int ecryptfs_new_file_context(struct inode *ecryptfs_inode); |
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void ecryptfs_write_crypt_stat_flags(char *page_virt, |
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struct ecryptfs_crypt_stat *crypt_stat, |
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size_t *written); |
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int ecryptfs_read_and_validate_header_region(struct inode *inode); |
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int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry, |
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struct inode *inode); |
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u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes); |
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int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code); |
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void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); |
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int ecryptfs_generate_key_packet_set(char *dest_base, |
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struct ecryptfs_crypt_stat *crypt_stat, |
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struct dentry *ecryptfs_dentry, |
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size_t *len, size_t max); |
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int |
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ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, |
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unsigned char *src, struct dentry *ecryptfs_dentry); |
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int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); |
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ssize_t |
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ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode, |
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const char *name, void *value, size_t size); |
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int |
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ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name, |
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const void *value, size_t size, int flags); |
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int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode); |
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#ifdef CONFIG_ECRYPT_FS_MESSAGING |
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int ecryptfs_process_response(struct ecryptfs_daemon *daemon, |
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struct ecryptfs_message *msg, u32 seq); |
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int ecryptfs_send_message(char *data, int data_len, |
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struct ecryptfs_msg_ctx **msg_ctx); |
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int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, |
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struct ecryptfs_message **emsg); |
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int ecryptfs_init_messaging(void); |
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void ecryptfs_release_messaging(void); |
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#else |
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static inline int ecryptfs_init_messaging(void) |
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{ |
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return 0; |
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} |
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static inline void ecryptfs_release_messaging(void) |
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{ } |
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static inline int ecryptfs_send_message(char *data, int data_len, |
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struct ecryptfs_msg_ctx **msg_ctx) |
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{ |
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return -ENOTCONN; |
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} |
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static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, |
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struct ecryptfs_message **emsg) |
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{ |
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return -ENOMSG; |
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} |
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#endif |
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void |
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ecryptfs_write_header_metadata(char *virt, |
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struct ecryptfs_crypt_stat *crypt_stat, |
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size_t *written); |
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int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig); |
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int |
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ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
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char *sig, u32 global_auth_tok_flags); |
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int ecryptfs_get_global_auth_tok_for_sig( |
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struct ecryptfs_global_auth_tok **global_auth_tok, |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig); |
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int |
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ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, |
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size_t key_size); |
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int ecryptfs_init_crypto(void); |
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int ecryptfs_destroy_crypto(void); |
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int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm); |
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int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm, |
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struct mutex **tfm_mutex, |
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char *cipher_name); |
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int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, |
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struct ecryptfs_auth_tok **auth_tok, |
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char *sig); |
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int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data, |
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loff_t offset, size_t size); |
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int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, |
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struct page *page_for_lower, |
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size_t offset_in_page, size_t size); |
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int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size); |
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int ecryptfs_read_lower(char *data, loff_t offset, size_t size, |
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struct inode *ecryptfs_inode); |
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int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs, |
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pgoff_t page_index, |
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size_t offset_in_page, size_t size, |
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struct inode *ecryptfs_inode); |
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struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index); |
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int ecryptfs_parse_packet_length(unsigned char *data, size_t *size, |
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size_t *length_size); |
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int ecryptfs_write_packet_length(char *dest, size_t size, |
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size_t *packet_size_length); |
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#ifdef CONFIG_ECRYPT_FS_MESSAGING |
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int ecryptfs_init_ecryptfs_miscdev(void); |
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void ecryptfs_destroy_ecryptfs_miscdev(void); |
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int ecryptfs_send_miscdev(char *data, size_t data_size, |
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struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, |
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u16 msg_flags, struct ecryptfs_daemon *daemon); |
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void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx); |
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int |
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ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file); |
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int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon); |
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int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon); |
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#endif |
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int ecryptfs_init_kthread(void); |
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void ecryptfs_destroy_kthread(void); |
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int ecryptfs_privileged_open(struct file **lower_file, |
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struct dentry *lower_dentry, |
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struct vfsmount *lower_mnt, |
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const struct cred *cred); |
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int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode); |
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void ecryptfs_put_lower_file(struct inode *inode); |
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int |
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ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, |
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size_t *packet_size, |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
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char *filename, size_t filename_size); |
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int |
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ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, |
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size_t *packet_size, |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
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char *data, size_t max_packet_size); |
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int ecryptfs_set_f_namelen(long *namelen, long lower_namelen, |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat); |
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int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat, |
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loff_t offset); |
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|
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extern const struct xattr_handler *ecryptfs_xattr_handlers[]; |
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|
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#endif /* #ifndef ECRYPTFS_KERNEL_H */
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