#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_XATTR \
| ECRYPTFS_VERSIONING_MULTKEY \
- | ECRYPTFS_VERSIONING_DEVMISC)
+ | 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
#define ECRYPTFS_DEFAULT_CIPHER "aes"
#define ECRYPTFS_DEFAULT_KEY_BYTES 16
#define ECRYPTFS_DEFAULT_HASH "md5"
+#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
#define ECRYPTFS_TAG_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.
*
* 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_KEY_SET 0x00000400
+#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;
*/
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;
#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 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;
+ size_t global_default_fn_cipher_key_bytes;
unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
+ 1];
+ unsigned char global_default_fn_cipher_name[
+ ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
+ char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
};
/* superblock private data. */
extern const struct inode_operations ecryptfs_dir_iops;
extern const struct inode_operations ecryptfs_symlink_iops;
extern const struct super_operations ecryptfs_sops;
-extern struct dentry_operations ecryptfs_dops;
-extern struct address_space_operations ecryptfs_aops;
+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;
int ecryptfs_interpose(struct dentry *hidden_dentry,
struct dentry *this_dentry, struct super_block *sb,
u32 flags);
+int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
+ struct dentry *lower_dentry,
+ struct inode *ecryptfs_dir_inode,
+ struct nameidata *ecryptfs_nd);
+int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
+ size_t *decrypted_name_size,
+ struct dentry *ecryptfs_dentry,
+ const char *name, size_t name_size);
int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
-int ecryptfs_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,
struct inode *ecryptfs_inode);
int ecryptfs_read_and_validate_xattr_region(char *page_virt,
struct dentry *ecryptfs_dentry);
-u8 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat);
+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,
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);
+ 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);
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 */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff