1 files changed, 43 insertions, 112 deletions

diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 43c7c43b06f..9ce1e92c7d9 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -29,6 +29,7 @@
 #define ECRYPTFS_KERNEL_H
 
 #include <keys/user-type.h>
+#include <keys/encrypted-type.h>
 #include <linux/fs.h>
 #include <linux/fs_stack.h>
 #include <linux/namei.h>
@@ -36,125 +37,18 @@
 #include <linux/hash.h>
 #include <linux/nsproxy.h>
 #include <linux/backing-dev.h>
+#include <linux/ecryptfs.h>
 
-/* Version verification for shared data structures w/ userspace */
-#define ECRYPTFS_VERSION_MAJOR 0x00
-#define ECRYPTFS_VERSION_MINOR 0x04
-#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
- * how to behave. */
-#define ECRYPTFS_VERSIONING_PASSPHRASE            0x00000001
-#define ECRYPTFS_VERSIONING_PUBKEY                0x00000002
-#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_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
-#define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2)
-/* The original signature size is only for what is stored on disk; all
- * in-memory representations are expanded hex, so it better adapted to
- * be passed around or referenced on the command line */
-#define ECRYPTFS_SIG_SIZE 8
-#define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2)
-#define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX
-#define ECRYPTFS_MAX_KEY_BYTES 64
-#define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512
 #define ECRYPTFS_DEFAULT_IV_BYTES 16
-#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_MAX_PKI_NAME_BYTES 16
 #define ECRYPTFS_DEFAULT_NUM_USERS 4
 #define ECRYPTFS_MAX_NUM_USERS 32768
 #define ECRYPTFS_XATTR_NAME "user.ecryptfs"
 
-#define RFC2440_CIPHER_DES3_EDE 0x02
-#define RFC2440_CIPHER_CAST_5 0x03
-#define RFC2440_CIPHER_BLOWFISH 0x04
-#define RFC2440_CIPHER_AES_128 0x07
-#define RFC2440_CIPHER_AES_192 0x08
-#define RFC2440_CIPHER_AES_256 0x09
-#define RFC2440_CIPHER_TWOFISH 0x0a
-#define RFC2440_CIPHER_CAST_6 0x0b
-
-#define RFC2440_CIPHER_RSA 0x01
-
-/**
- * For convenience, we may need to pass around the encrypted session
- * key between kernel and userspace because the authentication token
- * may not be extractable.  For example, the TPM may not release the
- * private key, instead requiring the encrypted data and returning the
- * decrypted data.
- */
-struct ecryptfs_session_key {
-#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001
-#define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002
-#define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004
-#define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008
-        u32 flags;
-        u32 encrypted_key_size;
-        u32 decrypted_key_size;
-        u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
-        u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES];
-};
-
-struct ecryptfs_password {
-        u32 password_bytes;
-        s32 hash_algo;
-        u32 hash_iterations;
-        u32 session_key_encryption_key_bytes;
-#define ECRYPTFS_PERSISTENT_PASSWORD 0x01
-#define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02
-        u32 flags;
-        /* Iterated-hash concatenation of salt and passphrase */
-        u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES];
-        u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
-        /* Always in expanded hex */
-        u8 salt[ECRYPTFS_SALT_SIZE];
-};
-
-enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY};
-
-struct ecryptfs_private_key {
-        u32 key_size;
-        u32 data_len;
-        u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
-        char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1];
-        u8 data[];
-};
-
-/* May be a password or a 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];
-        union {
-                struct ecryptfs_password password;
-                struct ecryptfs_private_key private_key;
-        } token;
-} __attribute__ ((packed));
-
 void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
 extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
 extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
@@ -185,11 +79,47 @@ struct ecryptfs_page_crypt_context {
         } param;
 };
 
+#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
+static inline struct ecryptfs_auth_tok *
+ecryptfs_get_encrypted_key_payload_data(struct key *key)
+{
+        if (key->type == &key_type_encrypted)
+                return (struct ecryptfs_auth_tok *)
+                        (&((struct encrypted_key_payload *)key->payload.data)->payload_data);
+        else
+                return NULL;
+}
+
+static inline struct key *ecryptfs_get_encrypted_key(char *sig)
+{
+        return request_key(&key_type_encrypted, sig, NULL);
+}
+
+#else
+static inline struct ecryptfs_auth_tok *
+ecryptfs_get_encrypted_key_payload_data(struct key *key)
+{
+        return NULL;
+}
+
+static inline struct key *ecryptfs_get_encrypted_key(char *sig)
+{
+        return ERR_PTR(-ENOKEY);
+}
+
+#endif /* CONFIG_ENCRYPTED_KEYS */
+
 static inline struct ecryptfs_auth_tok *
 ecryptfs_get_key_payload_data(struct key *key)
 {
-        return (struct ecryptfs_auth_tok *)
-                (((struct user_key_payload*)key->payload.data)->data);
+        struct ecryptfs_auth_tok *auth_tok;
+
+        auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
+        if (!auth_tok)
+                return (struct ecryptfs_auth_tok *)
+                        (((struct user_key_payload *)key->payload.data)->data);
+        else
+                return auth_tok;
 }
 
 #define ECRYPTFS_MAX_KEYSET_SIZE 1024
@@ -654,9 +584,10 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
 int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
 int ecryptfs_encrypt_page(struct page *page);
 int ecryptfs_decrypt_page(struct page *page);
-int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry);
+int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
+                            struct inode *ecryptfs_inode);
 int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
-int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
+int ecryptfs_new_file_context(struct inode *ecryptfs_inode);
 void ecryptfs_write_crypt_stat_flags(char *page_virt,
                                      struct ecryptfs_crypt_stat *crypt_stat,
                                      size_t *written);