X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fecryptfs%2Fecryptfs_kernel.h;h=542f625312f30a424023e07b7146af58e9b57144;hb=e071041be037eca208b62b84469a06bdfc692bea;hp=7bbd6e6e2743ab58bda0fc88db83d1c05cedc839;hpb=17398957aa0a05ef62535060b41d103590dcc533;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 7bbd6e6..542f625 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -4,7 +4,7 @@ * * Copyright (C) 1997-2003 Erez Zadok * Copyright (C) 2001-2003 Stony Brook University - * Copyright (C) 2004-2006 International Business Machines Corp. + * Copyright (C) 2004-2008 International Business Machines Corp. * Author(s): Michael A. Halcrow * Trevor S. Highland * Tyler Hicks @@ -34,11 +34,12 @@ #include #include #include +#include /* Version verification for shared data structures w/ userspace */ #define ECRYPTFS_VERSION_MAJOR 0x00 #define ECRYPTFS_VERSION_MINOR 0x04 -#define ECRYPTFS_SUPPORTED_FILE_VERSION 0x02 +#define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03 /* These flags indicate which features are supported by the kernel * module; userspace tools such as the mount helper read * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine @@ -48,10 +49,18 @@ #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004 #define ECRYPTFS_VERSIONING_POLICY 0x00000008 #define ECRYPTFS_VERSIONING_XATTR 0x00000010 +#define ECRYPTFS_VERSIONING_MULTKEY 0x00000020 +#define ECRYPTFS_VERSIONING_DEVMISC 0x00000040 +#define ECRYPTFS_VERSIONING_HMAC 0x00000080 +#define ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION 0x00000100 +#define ECRYPTFS_VERSIONING_GCM 0x00000200 #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ - | ECRYPTFS_VERSIONING_PUBKEY) - + | ECRYPTFS_VERSIONING_PUBKEY \ + | ECRYPTFS_VERSIONING_XATTR \ + | ECRYPTFS_VERSIONING_MULTKEY \ + | ECRYPTFS_VERSIONING_DEVMISC \ + | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION) #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH #define ECRYPTFS_SALT_SIZE 8 @@ -65,24 +74,16 @@ #define ECRYPTFS_MAX_KEY_BYTES 64 #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512 #define ECRYPTFS_DEFAULT_IV_BYTES 16 -#define ECRYPTFS_FILE_VERSION 0x02 -#define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192 +#define ECRYPTFS_FILE_VERSION 0x03 #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) -#define ECRYPTFS_NLMSG_HELO 100 -#define ECRYPTFS_NLMSG_QUIT 101 -#define ECRYPTFS_NLMSG_REQUEST 102 -#define ECRYPTFS_NLMSG_RESPONSE 103 #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 #define ECRYPTFS_DEFAULT_NUM_USERS 4 #define ECRYPTFS_MAX_NUM_USERS 32768 -#define ECRYPTFS_TRANSPORT_NETLINK 0 -#define ECRYPTFS_TRANSPORT_CONNECTOR 1 -#define ECRYPTFS_TRANSPORT_RELAYFS 2 -#define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK +#define ECRYPTFS_XATTR_NAME "user.ecryptfs" #define RFC2440_CIPHER_DES3_EDE 0x02 #define RFC2440_CIPHER_CAST_5 0x03 @@ -93,9 +94,6 @@ #define RFC2440_CIPHER_TWOFISH 0x0a #define RFC2440_CIPHER_CAST_6 0x0b -#define ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag)) -#define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag)) -#define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag)) #define RFC2440_CIPHER_RSA 0x01 /** @@ -146,6 +144,7 @@ struct ecryptfs_private_key { struct ecryptfs_auth_tok { u16 version; /* 8-bit major and 8-bit minor */ u16 token_type; +#define ECRYPTFS_ENCRYPT_ONLY 0x00000001 u32 flags; struct ecryptfs_session_key session_key; u8 reserved[32]; @@ -196,15 +195,15 @@ ecryptfs_get_key_payload_data(struct key *key) #define ECRYPTFS_MAX_KEYSET_SIZE 1024 #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 -#define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */ #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ #define ECRYPTFS_SALT_BYTES 2 #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ -#define ECRYPTFS_FILE_SIZE_BYTES 8 +#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64)) #define ECRYPTFS_DEFAULT_CIPHER "aes" #define ECRYPTFS_DEFAULT_KEY_BYTES 16 #define ECRYPTFS_DEFAULT_HASH "md5" +#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED @@ -212,7 +211,43 @@ ecryptfs_get_key_payload_data(struct key *key) #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41 #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42 #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43 +#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename + * as dentry name */ +#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in + * metadata */ +#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as + * dentry name */ +#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as + * metadata */ +/* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >= + * ECRYPTFS_MAX_IV_BYTES */ +#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16 +#define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */ #define MD5_DIGEST_SIZE 16 +#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE +#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED." +#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23 +#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED." +#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24 +#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32) + +struct ecryptfs_key_sig { + struct list_head crypt_stat_list; + char keysig[ECRYPTFS_SIG_SIZE_HEX]; +}; + +struct ecryptfs_filename { + struct list_head crypt_stat_list; +#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001 + u32 flags; + u32 seq_no; + char *filename; + char *encrypted_filename; + size_t filename_size; + size_t encrypted_filename_size; + char fnek_sig[ECRYPTFS_SIG_SIZE_HEX]; + char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1]; +}; /** * This is the primary struct associated with each encrypted file. @@ -220,22 +255,25 @@ ecryptfs_get_key_payload_data(struct key *key) * TODO: cache align/pack? */ struct ecryptfs_crypt_stat { -#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 -#define ECRYPTFS_POLICY_APPLIED 0x00000002 -#define ECRYPTFS_NEW_FILE 0x00000004 -#define ECRYPTFS_ENCRYPTED 0x00000008 -#define ECRYPTFS_SECURITY_WARNING 0x00000010 -#define ECRYPTFS_ENABLE_HMAC 0x00000020 -#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 -#define ECRYPTFS_KEY_VALID 0x00000080 -#define ECRYPTFS_METADATA_IN_XATTR 0x00000100 -#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 +#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 +#define ECRYPTFS_POLICY_APPLIED 0x00000002 +#define ECRYPTFS_NEW_FILE 0x00000004 +#define ECRYPTFS_ENCRYPTED 0x00000008 +#define ECRYPTFS_SECURITY_WARNING 0x00000010 +#define ECRYPTFS_ENABLE_HMAC 0x00000020 +#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 +#define ECRYPTFS_KEY_VALID 0x00000080 +#define ECRYPTFS_METADATA_IN_XATTR 0x00000100 +#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 +#define ECRYPTFS_KEY_SET 0x00000400 +#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000800 +#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00001000 +#define ECRYPTFS_ENCFN_USE_FEK 0x00002000 +#define ECRYPTFS_UNLINK_SIGS 0x00004000 u32 flags; unsigned int file_version; size_t iv_bytes; - size_t num_keysigs; - size_t header_extent_size; - size_t num_header_extents_at_front; + size_t num_header_bytes_at_front; size_t extent_size; /* Data extent size; default is 4096 */ size_t key_size; size_t extent_shift; @@ -247,7 +285,8 @@ struct ecryptfs_crypt_stat { unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; - unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX]; + struct list_head keysig_list; + struct mutex keysig_list_mutex; struct mutex cs_tfm_mutex; struct mutex cs_hash_tfm_mutex; struct mutex cs_mutex; @@ -257,6 +296,8 @@ struct ecryptfs_crypt_stat { struct ecryptfs_inode_info { struct inode vfs_inode; struct inode *wii_inode; + struct file *lower_file; + struct mutex lower_file_mutex; struct ecryptfs_crypt_stat crypt_stat; }; @@ -268,6 +309,59 @@ struct ecryptfs_dentry_info { }; /** + * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint + * @flags: Status flags + * @mount_crypt_stat_list: These auth_toks hang off the mount-wide + * cryptographic context. Every time a new + * inode comes into existence, eCryptfs copies + * the auth_toks on that list to the set of + * auth_toks on the inode's crypt_stat + * @global_auth_tok_key: The key from the user's keyring for the sig + * @global_auth_tok: The key contents + * @sig: The key identifier + * + * ecryptfs_global_auth_tok structs refer to authentication token keys + * in the user keyring that apply to newly created files. A list of + * these objects hangs off of the mount_crypt_stat struct for any + * given eCryptfs mount. This struct maintains a reference to both the + * key contents and the key itself so that the key can be put on + * unmount. + */ +struct ecryptfs_global_auth_tok { +#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001 +#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002 + u32 flags; + struct list_head mount_crypt_stat_list; + struct key *global_auth_tok_key; + struct ecryptfs_auth_tok *global_auth_tok; + unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; +}; + +/** + * ecryptfs_key_tfm - Persistent key tfm + * @key_tfm: crypto API handle to the key + * @key_size: Key size in bytes + * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is + * using the persistent TFM at any point in time + * @key_tfm_list: Handle to hang this off the module-wide TFM list + * @cipher_name: String name for the cipher for this TFM + * + * Typically, eCryptfs will use the same ciphers repeatedly throughout + * the course of its operations. In order to avoid unnecessarily + * destroying and initializing the same cipher repeatedly, eCryptfs + * keeps a list of crypto API contexts around to use when needed. + */ +struct ecryptfs_key_tfm { + struct crypto_blkcipher *key_tfm; + size_t key_size; + struct mutex key_tfm_mutex; + struct list_head key_tfm_list; + unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; +}; + +extern struct mutex key_tfm_list_mutex; + +/** * This struct is to enable a mount-wide passphrase/salt combo. This * is more or less a stopgap to provide similar functionality to other * crypto filesystems like EncFS or CFS until full policy support is @@ -278,15 +372,21 @@ struct ecryptfs_mount_crypt_stat { #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 +#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008 +#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010 +#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020 +#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040 u32 flags; - struct ecryptfs_auth_tok *global_auth_tok; - struct key *global_auth_tok_key; + struct list_head global_auth_tok_list; + struct mutex global_auth_tok_list_mutex; + size_t num_global_auth_toks; size_t global_default_cipher_key_size; - struct crypto_blkcipher *global_key_tfm; - struct mutex global_key_tfm_mutex; + size_t global_default_fn_cipher_key_bytes; unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; - unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; + unsigned char global_default_fn_cipher_name[ + ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; + char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; }; /* superblock private data. */ @@ -309,44 +409,61 @@ struct ecryptfs_auth_tok_list_item { }; struct ecryptfs_message { + /* Can never be greater than ecryptfs_message_buf_len */ + /* Used to find the parent msg_ctx */ + /* Inherits from msg_ctx->index */ u32 index; u32 data_len; u8 data[]; }; struct ecryptfs_msg_ctx { -#define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 -#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 -#define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 - u32 state; - unsigned int index; - unsigned int counter; +#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01 +#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02 +#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03 +#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04 + u8 state; +#define ECRYPTFS_MSG_HELO 100 +#define ECRYPTFS_MSG_QUIT 101 +#define ECRYPTFS_MSG_REQUEST 102 +#define ECRYPTFS_MSG_RESPONSE 103 + u8 type; + u32 index; + /* Counter converts to a sequence number. Each message sent + * out for which we expect a response has an associated + * sequence number. The response must have the same sequence + * number as the counter for the msg_stc for the message to be + * valid. */ + u32 counter; + size_t msg_size; struct ecryptfs_message *msg; struct task_struct *task; struct list_head node; + struct list_head daemon_out_list; struct mutex mux; }; -extern struct list_head ecryptfs_msg_ctx_free_list; -extern struct list_head ecryptfs_msg_ctx_alloc_list; -extern struct mutex ecryptfs_msg_ctx_lists_mux; +struct ecryptfs_daemon; -#define ecryptfs_uid_hash(uid) \ - hash_long((unsigned long)uid, ecryptfs_hash_buckets) -extern struct hlist_head *ecryptfs_daemon_id_hash; -extern struct mutex ecryptfs_daemon_id_hash_mux; -extern int ecryptfs_hash_buckets; - -extern unsigned int ecryptfs_msg_counter; -extern struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr; -extern unsigned int ecryptfs_transport; - -struct ecryptfs_daemon_id { - pid_t pid; - uid_t uid; - struct hlist_node id_chain; +struct ecryptfs_daemon { +#define ECRYPTFS_DAEMON_IN_READ 0x00000001 +#define ECRYPTFS_DAEMON_IN_POLL 0x00000002 +#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004 +#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008 + u32 flags; + u32 num_queued_msg_ctx; + struct pid *pid; + uid_t euid; + struct user_namespace *user_ns; + struct task_struct *task; + struct mutex mux; + struct list_head msg_ctx_out_queue; + wait_queue_head_t wait; + struct hlist_node euid_chain; }; +extern struct mutex ecryptfs_daemon_hash_mux; + static inline struct ecryptfs_file_info * ecryptfs_file_to_private(struct file *file) { @@ -455,17 +572,17 @@ ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) } #define ecryptfs_printk(type, fmt, arg...) \ - __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); + __ecryptfs_printk(type "%s: " fmt, __func__, ## arg); void __ecryptfs_printk(const char *fmt, ...); extern const struct file_operations ecryptfs_main_fops; extern const struct file_operations ecryptfs_dir_fops; -extern struct inode_operations ecryptfs_main_iops; -extern struct inode_operations ecryptfs_dir_iops; -extern struct inode_operations ecryptfs_symlink_iops; -extern struct super_operations ecryptfs_sops; -extern struct dentry_operations ecryptfs_dops; -extern struct address_space_operations ecryptfs_aops; +extern const struct inode_operations ecryptfs_main_iops; +extern const struct inode_operations ecryptfs_dir_iops; +extern const struct inode_operations ecryptfs_symlink_iops; +extern const struct super_operations ecryptfs_sops; +extern const struct dentry_operations ecryptfs_dops; +extern const struct address_space_operations ecryptfs_aops; extern int ecryptfs_verbosity; extern unsigned int ecryptfs_message_buf_len; extern signed long ecryptfs_message_wait_timeout; @@ -476,21 +593,47 @@ extern struct kmem_cache *ecryptfs_file_info_cache; extern struct kmem_cache *ecryptfs_dentry_info_cache; extern struct kmem_cache *ecryptfs_inode_info_cache; extern struct kmem_cache *ecryptfs_sb_info_cache; -extern struct kmem_cache *ecryptfs_header_cache_0; extern struct kmem_cache *ecryptfs_header_cache_1; extern struct kmem_cache *ecryptfs_header_cache_2; -extern struct kmem_cache *ecryptfs_lower_page_cache; +extern struct kmem_cache *ecryptfs_xattr_cache; +extern struct kmem_cache *ecryptfs_key_record_cache; +extern struct kmem_cache *ecryptfs_key_sig_cache; +extern struct kmem_cache *ecryptfs_global_auth_tok_cache; +extern struct kmem_cache *ecryptfs_key_tfm_cache; +extern struct kmem_cache *ecryptfs_open_req_cache; + +struct ecryptfs_open_req { +#define ECRYPTFS_REQ_PROCESSED 0x00000001 +#define ECRYPTFS_REQ_DROPPED 0x00000002 +#define ECRYPTFS_REQ_ZOMBIE 0x00000004 + u32 flags; + struct file **lower_file; + struct dentry *lower_dentry; + struct vfsmount *lower_mnt; + wait_queue_head_t wait; + struct mutex mux; + struct list_head kthread_ctl_list; +}; +#define ECRYPTFS_INTERPOSE_FLAG_D_ADD 0x00000001 int ecryptfs_interpose(struct dentry *hidden_dentry, struct dentry *this_dentry, struct super_block *sb, - int flag); + u32 flags); +int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, + struct dentry *lower_dentry, + struct inode *ecryptfs_dir_inode, + struct nameidata *ecryptfs_nd); +int ecryptfs_decode_and_decrypt_filename(char **decrypted_name, + size_t *decrypted_name_size, + struct dentry *ecryptfs_dentry, + const char *name, size_t name_size); int ecryptfs_fill_zeros(struct file *file, loff_t new_length); -int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat, - const char *name, int length, - char **decrypted_name); -int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat, - const char *name, int length, - char **encoded_name); +int ecryptfs_encrypt_and_encode_filename( + char **encoded_name, + size_t *encoded_name_size, + struct ecryptfs_crypt_stat *crypt_stat, + struct ecryptfs_mount_crypt_stat *mount_crypt_stat, + const char *name, size_t name_size); struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); void ecryptfs_dump_hex(char *data, int bytes); int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, @@ -498,93 +641,126 @@ int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_rotate_iv(unsigned char *iv); void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); -void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); -void ecryptfs_destruct_mount_crypt_stat( +void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); +void ecryptfs_destroy_mount_crypt_stat( struct ecryptfs_mount_crypt_stat *mount_crypt_stat); int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); -int ecryptfs_crypto_api_algify_cipher_name(char **algified_name, - char *cipher_name, - char *chaining_modifier); -int ecryptfs_write_inode_size_to_header(struct file *lower_file, - struct inode *lower_inode, - struct inode *inode); -int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, - struct file *lower_file, - unsigned long lower_page_index, int byte_offset, - int region_bytes); -int -ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, - struct file *lower_file, int byte_offset, - int region_size); -int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, - struct file *lower_file); -int ecryptfs_do_readpage(struct file *file, struct page *page, - pgoff_t lower_page_index); -int ecryptfs_grab_and_map_lower_page(struct page **lower_page, - char **lower_virt, - struct inode *lower_inode, - unsigned long lower_page_index); -int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, - struct inode *lower_inode, - struct writeback_control *wbc); -int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx); -int ecryptfs_decrypt_page(struct file *file, struct page *page); -int ecryptfs_write_headers(struct dentry *ecryptfs_dentry, - struct file *lower_file); -int ecryptfs_write_headers_virt(char *page_virt, - struct ecryptfs_crypt_stat *crypt_stat, - struct dentry *ecryptfs_dentry); -int ecryptfs_read_headers(struct dentry *ecryptfs_dentry, - struct file *lower_file); +int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode); +int ecryptfs_encrypt_page(struct page *page); +int ecryptfs_decrypt_page(struct page *page); +int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry); +int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry); int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); -int contains_ecryptfs_marker(char *data); -int ecryptfs_read_header_region(char *data, struct dentry *dentry, - struct vfsmount *mnt); -u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); -int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); +int ecryptfs_read_and_validate_header_region(char *data, + struct inode *ecryptfs_inode); +int ecryptfs_read_and_validate_xattr_region(char *page_virt, + struct dentry *ecryptfs_dentry); +u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes); +int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code); void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); int ecryptfs_generate_key_packet_set(char *dest_base, struct ecryptfs_crypt_stat *crypt_stat, struct dentry *ecryptfs_dentry, size_t *len, size_t max); -int process_request_key_err(long err_code); int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, unsigned char *src, struct dentry *ecryptfs_dentry); int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); -int -ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name, - size_t *key_size); int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); int ecryptfs_inode_set(struct inode *inode, void *lower_inode); void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); -int ecryptfs_open_lower_file(struct file **lower_file, - struct dentry *lower_dentry, - struct vfsmount *lower_mnt, int flags); -int ecryptfs_close_lower_file(struct file *lower_file); - -int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid); -int ecryptfs_process_quit(uid_t uid, pid_t pid); -int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, - pid_t pid, u32 seq); -int ecryptfs_send_message(unsigned int transport, char *data, int data_len, +ssize_t +ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, + void *value, size_t size); +int +ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, + size_t size, int flags); +int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode); +int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns, + struct pid *pid); +int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns, + struct pid *pid); +int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid, + struct user_namespace *user_ns, struct pid *pid, + u32 seq); +int ecryptfs_send_message(char *data, int data_len, struct ecryptfs_msg_ctx **msg_ctx); int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, struct ecryptfs_message **emsg); -int ecryptfs_init_messaging(unsigned int transport); -void ecryptfs_release_messaging(unsigned int transport); - -int ecryptfs_send_netlink(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, - u16 msg_flags, pid_t daemon_pid); -int ecryptfs_init_netlink(void); -void ecryptfs_release_netlink(void); - -int ecryptfs_send_connector(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, - u16 msg_flags, pid_t daemon_pid); -int ecryptfs_init_connector(void); -void ecryptfs_release_connector(void); - +int ecryptfs_init_messaging(void); +void ecryptfs_release_messaging(void); + +void +ecryptfs_write_header_metadata(char *virt, + struct ecryptfs_crypt_stat *crypt_stat, + size_t *written); +int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig); +int +ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat, + char *sig, u32 global_auth_tok_flags); +int ecryptfs_get_global_auth_tok_for_sig( + struct ecryptfs_global_auth_tok **global_auth_tok, + struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig); +int +ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, + size_t key_size); +int ecryptfs_init_crypto(void); +int ecryptfs_destroy_crypto(void); +int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm); +int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm, + struct mutex **tfm_mutex, + char *cipher_name); +int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, + struct ecryptfs_auth_tok **auth_tok, + char *sig); +int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data, + loff_t offset, size_t size); +int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, + struct page *page_for_lower, + size_t offset_in_page, size_t size); +int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset, + size_t size); +int ecryptfs_read_lower(char *data, loff_t offset, size_t size, + struct inode *ecryptfs_inode); +int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs, + pgoff_t page_index, + size_t offset_in_page, size_t size, + struct inode *ecryptfs_inode); +struct page *ecryptfs_get_locked_page(struct file *file, loff_t index); +int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon); +int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid, + struct user_namespace *user_ns); +int ecryptfs_parse_packet_length(unsigned char *data, size_t *size, + size_t *length_size); +int ecryptfs_write_packet_length(char *dest, size_t size, + size_t *packet_size_length); +int ecryptfs_init_ecryptfs_miscdev(void); +void ecryptfs_destroy_ecryptfs_miscdev(void); +int ecryptfs_send_miscdev(char *data, size_t data_size, + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, + u16 msg_flags, struct ecryptfs_daemon *daemon); +void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx); +int +ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid, + struct user_namespace *user_ns, struct pid *pid); +int ecryptfs_init_kthread(void); +void ecryptfs_destroy_kthread(void); +int ecryptfs_privileged_open(struct file **lower_file, + struct dentry *lower_dentry, + struct vfsmount *lower_mnt, + const struct cred *cred); +int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry); +int +ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, + size_t *packet_size, + struct ecryptfs_mount_crypt_stat *mount_crypt_stat, + char *filename, size_t filename_size); +int +ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, + size_t *packet_size, + struct ecryptfs_mount_crypt_stat *mount_crypt_stat, + char *data, size_t max_packet_size); +int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat, + loff_t offset); #endif /* #ifndef ECRYPTFS_KERNEL_H */