^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * eCryptfs: Linux filesystem encryption layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Kernel declarations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1997-2003 Erez Zadok
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2001-2003 Stony Brook University
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2004-2008 International Business Machines Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Trevor S. Highland <trevor.highland@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Tyler Hicks <code@tyhicks.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifndef ECRYPTFS_KERNEL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define ECRYPTFS_KERNEL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <crypto/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <keys/user-type.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <keys/encrypted-type.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/fs_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/nsproxy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/ecryptfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define ECRYPTFS_DEFAULT_IV_BYTES 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define ECRYPTFS_DEFAULT_NUM_USERS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define ECRYPTFS_MAX_NUM_USERS 32768
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define ECRYPTFS_XATTR_NAME "user.ecryptfs"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ecryptfs_to_hex(char *dst, char *src, size_t src_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) char *end = bin2hex(dst, src, src_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *end = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct ecryptfs_key_record {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned char type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) size_t enc_key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned char sig[ECRYPTFS_SIG_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct ecryptfs_auth_tok_list {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct ecryptfs_auth_tok *auth_tok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct ecryptfs_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct ecryptfs_mount_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct ecryptfs_page_crypt_context {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define ECRYPTFS_PREPARE_COMMIT_MODE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define ECRYPTFS_WRITEPAGE_MODE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) unsigned int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct file *lower_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct writeback_control *wbc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) } param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static inline struct ecryptfs_auth_tok *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ecryptfs_get_encrypted_key_payload_data(struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct encrypted_key_payload *payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (key->type != &key_type_encrypted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) payload = key->payload.data[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!payload)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return ERR_PTR(-EKEYREVOKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return (struct ecryptfs_auth_tok *)payload->payload_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static inline struct key *ecryptfs_get_encrypted_key(char *sig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return request_key(&key_type_encrypted, sig, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static inline struct ecryptfs_auth_tok *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ecryptfs_get_encrypted_key_payload_data(struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline struct key *ecryptfs_get_encrypted_key(char *sig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return ERR_PTR(-ENOKEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #endif /* CONFIG_ENCRYPTED_KEYS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static inline struct ecryptfs_auth_tok *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ecryptfs_get_key_payload_data(struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct ecryptfs_auth_tok *auth_tok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct user_key_payload *ukp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (auth_tok)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return auth_tok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ukp = user_key_payload_locked(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!ukp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return ERR_PTR(-EKEYREVOKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return (struct ecryptfs_auth_tok *)ukp->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define ECRYPTFS_MAX_KEYSET_SIZE 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 31
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define ECRYPTFS_MAX_NUM_ENC_KEYS 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define ECRYPTFS_SALT_BYTES 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define ECRYPTFS_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) + MAGIC_ECRYPTFS_MARKER_SIZE_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #define ECRYPTFS_DEFAULT_CIPHER "aes"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define ECRYPTFS_DEFAULT_KEY_BYTES 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #define ECRYPTFS_DEFAULT_HASH "md5"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * as dentry name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * metadata */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * dentry name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * metadata */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #define ECRYPTFS_MIN_PKT_LEN_SIZE 1 /* Min size to specify packet length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define ECRYPTFS_MAX_PKT_LEN_SIZE 2 /* Pass at least this many bytes to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * ecryptfs_parse_packet_length() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * ecryptfs_write_packet_length()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * ECRYPTFS_MAX_IV_BYTES */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) #define MD5_DIGEST_SIZE 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #define ECRYPTFS_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) + ECRYPTFS_SIG_SIZE + 1 + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) + ECRYPTFS_SIG_SIZE + 1 + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) #define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #ifdef CONFIG_ECRYPT_FS_MESSAGING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) # define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) | ECRYPTFS_VERSIONING_PUBKEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) # define ECRYPTFS_VERSIONING_MASK_MESSAGING 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) | ECRYPTFS_VERSIONING_XATTR \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) | ECRYPTFS_VERSIONING_MULTKEY \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) | ECRYPTFS_VERSIONING_MASK_MESSAGING \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct ecryptfs_key_sig {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct list_head crypt_stat_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) struct ecryptfs_filename {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct list_head crypt_stat_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) u32 seq_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) char *filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) char *encrypted_filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) size_t filename_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) size_t encrypted_filename_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * This is the primary struct associated with each encrypted file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * TODO: cache align/pack?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct ecryptfs_crypt_stat {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #define ECRYPTFS_POLICY_APPLIED 0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #define ECRYPTFS_ENCRYPTED 0x00000004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) #define ECRYPTFS_SECURITY_WARNING 0x00000008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #define ECRYPTFS_ENABLE_HMAC 0x00000010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) #define ECRYPTFS_KEY_VALID 0x00000040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #define ECRYPTFS_METADATA_IN_XATTR 0x00000080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #define ECRYPTFS_KEY_SET 0x00000200
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) #define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) #define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) #define ECRYPTFS_ENCFN_USE_FEK 0x00001000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) #define ECRYPTFS_UNLINK_SIGS 0x00002000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) unsigned int file_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) size_t iv_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) size_t metadata_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) size_t extent_size; /* Data extent size; default is 4096 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) size_t key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) size_t extent_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) unsigned int extent_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct crypto_skcipher *tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct crypto_shash *hash_tfm; /* Crypto context for generating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * the initialization vectors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct list_head keysig_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct mutex keysig_list_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct mutex cs_tfm_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct mutex cs_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /* inode private data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct ecryptfs_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct inode *wii_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct mutex lower_file_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) atomic_t lower_file_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct file *lower_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct ecryptfs_crypt_stat crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /* dentry private data. Each dentry must keep track of a lower
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * vfsmount too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct ecryptfs_dentry_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) struct path lower_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct ecryptfs_crypt_stat *crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct rcu_head rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * @flags: Status flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * @mount_crypt_stat_list: These auth_toks hang off the mount-wide
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * cryptographic context. Every time a new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * inode comes into existence, eCryptfs copies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * the auth_toks on that list to the set of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * auth_toks on the inode's crypt_stat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * @global_auth_tok_key: The key from the user's keyring for the sig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * @global_auth_tok: The key contents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * @sig: The key identifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * ecryptfs_global_auth_tok structs refer to authentication token keys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * in the user keyring that apply to newly created files. A list of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * these objects hangs off of the mount_crypt_stat struct for any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * given eCryptfs mount. This struct maintains a reference to both the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * key contents and the key itself so that the key can be put on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * unmount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct ecryptfs_global_auth_tok {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) #define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) #define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct list_head mount_crypt_stat_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct key *global_auth_tok_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * ecryptfs_key_tfm - Persistent key tfm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * @key_tfm: crypto API handle to the key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * @key_size: Key size in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * using the persistent TFM at any point in time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * @key_tfm_list: Handle to hang this off the module-wide TFM list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * @cipher_name: String name for the cipher for this TFM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * Typically, eCryptfs will use the same ciphers repeatedly throughout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * the course of its operations. In order to avoid unnecessarily
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * destroying and initializing the same cipher repeatedly, eCryptfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * keeps a list of crypto API contexts around to use when needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) struct ecryptfs_key_tfm {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct crypto_skcipher *key_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) size_t key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct mutex key_tfm_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct list_head key_tfm_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) extern struct mutex key_tfm_list_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * This struct is to enable a mount-wide passphrase/salt combo. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * is more or less a stopgap to provide similar functionality to other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * crypto filesystems like EncFS or CFS until full policy support is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * implemented in eCryptfs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) struct ecryptfs_mount_crypt_stat {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* Pointers to memory we do not own, do not free these */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) #define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) #define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) #define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) #define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) #define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct list_head global_auth_tok_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) struct mutex global_auth_tok_list_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) size_t global_default_cipher_key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) size_t global_default_fn_cipher_key_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) unsigned char global_default_fn_cipher_name[
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /* superblock private data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct ecryptfs_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct super_block *wsi_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) struct ecryptfs_mount_crypt_stat mount_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) /* file private data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct ecryptfs_file_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct file *wfi_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) struct ecryptfs_crypt_stat *crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /* auth_tok <=> encrypted_session_key mappings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct ecryptfs_auth_tok_list_item {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct ecryptfs_auth_tok auth_tok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct ecryptfs_message {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* Can never be greater than ecryptfs_message_buf_len */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /* Used to find the parent msg_ctx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) /* Inherits from msg_ctx->index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) u32 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) u32 data_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) u8 data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) struct ecryptfs_msg_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) #define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) #define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) #define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) u8 state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) #define ECRYPTFS_MSG_HELO 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) #define ECRYPTFS_MSG_QUIT 101
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) #define ECRYPTFS_MSG_REQUEST 102
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) #define ECRYPTFS_MSG_RESPONSE 103
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) u8 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) u32 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* Counter converts to a sequence number. Each message sent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * out for which we expect a response has an associated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * sequence number. The response must have the same sequence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * number as the counter for the msg_stc for the message to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) * valid. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) u32 counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) size_t msg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct ecryptfs_message *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct task_struct *task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct list_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct list_head daemon_out_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct mutex mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) struct ecryptfs_daemon {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) #define ECRYPTFS_DAEMON_IN_READ 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) #define ECRYPTFS_DAEMON_IN_POLL 0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) #define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) #define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) u32 num_queued_msg_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct file *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct mutex mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) struct list_head msg_ctx_out_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) wait_queue_head_t wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct hlist_node euid_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) #ifdef CONFIG_ECRYPT_FS_MESSAGING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) extern struct mutex ecryptfs_daemon_hash_mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static inline size_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return crypt_stat->metadata_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) static inline struct ecryptfs_file_info *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) ecryptfs_file_to_private(struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ecryptfs_set_file_private(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct ecryptfs_file_info *file_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) file->private_data = file_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) static inline struct file *ecryptfs_file_to_lower(struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) lower_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static inline struct ecryptfs_inode_info *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) ecryptfs_inode_to_private(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return ecryptfs_inode_to_private(inode)->wii_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) static inline struct ecryptfs_sb_info *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) ecryptfs_superblock_to_private(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return (struct ecryptfs_sb_info *)sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ecryptfs_set_superblock_private(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct ecryptfs_sb_info *sb_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) sb->s_fs_info = sb_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) static inline struct super_block *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) ecryptfs_superblock_to_lower(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ecryptfs_set_superblock_lower(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) struct super_block *lower_sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static inline struct ecryptfs_dentry_info *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) ecryptfs_dentry_to_private(struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) ecryptfs_set_dentry_private(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) struct ecryptfs_dentry_info *dentry_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) dentry->d_fsdata = dentry_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) static inline struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) ecryptfs_dentry_to_lower(struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) static inline struct vfsmount *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) static inline struct path *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) ecryptfs_dentry_to_lower_path(struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) #define ecryptfs_printk(type, fmt, arg...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) __printf(1, 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) void __ecryptfs_printk(const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) extern const struct file_operations ecryptfs_main_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) extern const struct file_operations ecryptfs_dir_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) extern const struct inode_operations ecryptfs_main_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) extern const struct inode_operations ecryptfs_dir_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) extern const struct inode_operations ecryptfs_symlink_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) extern const struct super_operations ecryptfs_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) extern const struct dentry_operations ecryptfs_dops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) extern const struct address_space_operations ecryptfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) extern int ecryptfs_verbosity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) extern unsigned int ecryptfs_message_buf_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) extern signed long ecryptfs_message_wait_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) extern unsigned int ecryptfs_number_of_users;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) extern struct kmem_cache *ecryptfs_file_info_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) extern struct kmem_cache *ecryptfs_dentry_info_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) extern struct kmem_cache *ecryptfs_inode_info_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) extern struct kmem_cache *ecryptfs_sb_info_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) extern struct kmem_cache *ecryptfs_header_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) extern struct kmem_cache *ecryptfs_xattr_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) extern struct kmem_cache *ecryptfs_key_record_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) extern struct kmem_cache *ecryptfs_key_sig_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) extern struct kmem_cache *ecryptfs_key_tfm_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) struct inode *ecryptfs_get_inode(struct inode *lower_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) size_t *decrypted_name_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) const char *name, size_t name_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int ecryptfs_encrypt_and_encode_filename(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) char **encoded_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) size_t *encoded_name_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) const char *name, size_t name_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) void ecryptfs_dump_hex(char *data, int bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) int sg_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) void ecryptfs_rotate_iv(unsigned char *iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) void ecryptfs_destroy_mount_crypt_stat(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) int ecryptfs_encrypt_page(struct page *page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) int ecryptfs_decrypt_page(struct page *page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) int ecryptfs_new_file_context(struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) void ecryptfs_write_crypt_stat_flags(char *page_virt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) struct ecryptfs_crypt_stat *crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) size_t *written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) int ecryptfs_read_and_validate_header_region(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) int ecryptfs_generate_key_packet_set(char *dest_base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct ecryptfs_crypt_stat *crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) struct dentry *ecryptfs_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) size_t *len, size_t max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) unsigned char *src, struct dentry *ecryptfs_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) const char *name, void *value, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) const void *value, size_t size, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) #ifdef CONFIG_ECRYPT_FS_MESSAGING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct ecryptfs_message *msg, u32 seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) int ecryptfs_send_message(char *data, int data_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct ecryptfs_msg_ctx **msg_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct ecryptfs_message **emsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) int ecryptfs_init_messaging(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) void ecryptfs_release_messaging(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) static inline int ecryptfs_init_messaging(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) static inline void ecryptfs_release_messaging(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) static inline int ecryptfs_send_message(char *data, int data_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) struct ecryptfs_msg_ctx **msg_ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) return -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) struct ecryptfs_message **emsg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return -ENOMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) ecryptfs_write_header_metadata(char *virt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) struct ecryptfs_crypt_stat *crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) size_t *written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) char *sig, u32 global_auth_tok_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) int ecryptfs_get_global_auth_tok_for_sig(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) struct ecryptfs_global_auth_tok **global_auth_tok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) size_t key_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) int ecryptfs_init_crypto(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) int ecryptfs_destroy_crypto(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) struct mutex **tfm_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) char *cipher_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) struct ecryptfs_auth_tok **auth_tok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) char *sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) loff_t offset, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct page *page_for_lower,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) size_t offset_in_page, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) pgoff_t page_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) size_t offset_in_page, size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) struct inode *ecryptfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) size_t *length_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) int ecryptfs_write_packet_length(char *dest, size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) size_t *packet_size_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) #ifdef CONFIG_ECRYPT_FS_MESSAGING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) int ecryptfs_init_ecryptfs_miscdev(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) void ecryptfs_destroy_ecryptfs_miscdev(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) int ecryptfs_send_miscdev(char *data, size_t data_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) u16 msg_flags, struct ecryptfs_daemon *daemon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) int ecryptfs_init_kthread(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) void ecryptfs_destroy_kthread(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) int ecryptfs_privileged_open(struct file **lower_file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) struct dentry *lower_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) struct vfsmount *lower_mnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) const struct cred *cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) void ecryptfs_put_lower_file(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) size_t *packet_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) char *filename, size_t filename_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) size_t *packet_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) char *data, size_t max_packet_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) loff_t offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) extern const struct xattr_handler *ecryptfs_xattr_handlers[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) #endif /* #ifndef ECRYPTFS_KERNEL_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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