TOMOYO: Allow using owner/group etc. of file objects as conditions.
This patch adds support for permission checks using file object's DAC
attributes (e.g. owner/group) when checking file's pathnames. Hooks for passing
file object's pointers are in the last patch of this pathset.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index 958d433..5a0fced 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -54,10 +54,66 @@
TOMOYO_TASK_FSGID, /* current_fsgid() */
TOMOYO_TASK_PID, /* sys_getpid() */
TOMOYO_TASK_PPID, /* sys_getppid() */
+ TOMOYO_TYPE_IS_SOCKET, /* S_IFSOCK */
+ TOMOYO_TYPE_IS_SYMLINK, /* S_IFLNK */
+ TOMOYO_TYPE_IS_FILE, /* S_IFREG */
+ TOMOYO_TYPE_IS_BLOCK_DEV, /* S_IFBLK */
+ TOMOYO_TYPE_IS_DIRECTORY, /* S_IFDIR */
+ TOMOYO_TYPE_IS_CHAR_DEV, /* S_IFCHR */
+ TOMOYO_TYPE_IS_FIFO, /* S_IFIFO */
+ TOMOYO_MODE_SETUID, /* S_ISUID */
+ TOMOYO_MODE_SETGID, /* S_ISGID */
+ TOMOYO_MODE_STICKY, /* S_ISVTX */
+ TOMOYO_MODE_OWNER_READ, /* S_IRUSR */
+ TOMOYO_MODE_OWNER_WRITE, /* S_IWUSR */
+ TOMOYO_MODE_OWNER_EXECUTE, /* S_IXUSR */
+ TOMOYO_MODE_GROUP_READ, /* S_IRGRP */
+ TOMOYO_MODE_GROUP_WRITE, /* S_IWGRP */
+ TOMOYO_MODE_GROUP_EXECUTE, /* S_IXGRP */
+ TOMOYO_MODE_OTHERS_READ, /* S_IROTH */
+ TOMOYO_MODE_OTHERS_WRITE, /* S_IWOTH */
+ TOMOYO_MODE_OTHERS_EXECUTE, /* S_IXOTH */
+ TOMOYO_PATH1_UID,
+ TOMOYO_PATH1_GID,
+ TOMOYO_PATH1_INO,
+ TOMOYO_PATH1_MAJOR,
+ TOMOYO_PATH1_MINOR,
+ TOMOYO_PATH1_PERM,
+ TOMOYO_PATH1_TYPE,
+ TOMOYO_PATH1_DEV_MAJOR,
+ TOMOYO_PATH1_DEV_MINOR,
+ TOMOYO_PATH2_UID,
+ TOMOYO_PATH2_GID,
+ TOMOYO_PATH2_INO,
+ TOMOYO_PATH2_MAJOR,
+ TOMOYO_PATH2_MINOR,
+ TOMOYO_PATH2_PERM,
+ TOMOYO_PATH2_TYPE,
+ TOMOYO_PATH2_DEV_MAJOR,
+ TOMOYO_PATH2_DEV_MINOR,
+ TOMOYO_PATH1_PARENT_UID,
+ TOMOYO_PATH1_PARENT_GID,
+ TOMOYO_PATH1_PARENT_INO,
+ TOMOYO_PATH1_PARENT_PERM,
+ TOMOYO_PATH2_PARENT_UID,
+ TOMOYO_PATH2_PARENT_GID,
+ TOMOYO_PATH2_PARENT_INO,
+ TOMOYO_PATH2_PARENT_PERM,
TOMOYO_MAX_CONDITION_KEYWORD,
TOMOYO_NUMBER_UNION,
};
+
+/* Index numbers for stat(). */
+enum tomoyo_path_stat_index {
+ /* Do not change this order. */
+ TOMOYO_PATH1,
+ TOMOYO_PATH1_PARENT,
+ TOMOYO_PATH2,
+ TOMOYO_PATH2_PARENT,
+ TOMOYO_MAX_PATH_STAT
+};
+
/* Index numbers for operation mode. */
enum tomoyo_mode_index {
TOMOYO_CONFIG_DISABLED,
@@ -290,6 +346,11 @@
/* Structure for request info. */
struct tomoyo_request_info {
+ /*
+ * For holding parameters specific to operations which deal files.
+ * NULL if not dealing files.
+ */
+ struct tomoyo_obj_info *obj;
struct tomoyo_domain_info *domain;
/* For holding parameters. */
union {
@@ -388,6 +449,35 @@
struct tomoyo_number_union number;
};
+/* Subset of "struct stat". Used by conditional ACL and audit logs. */
+struct tomoyo_mini_stat {
+ uid_t uid;
+ gid_t gid;
+ ino_t ino;
+ mode_t mode;
+ dev_t dev;
+ dev_t rdev;
+};
+
+/* Structure for attribute checks in addition to pathname checks. */
+struct tomoyo_obj_info {
+ /*
+ * True if tomoyo_get_attributes() was already called, false otherwise.
+ */
+ bool validate_done;
+ /* True if @stat[] is valid. */
+ bool stat_valid[TOMOYO_MAX_PATH_STAT];
+ /* First pathname. Initialized with { NULL, NULL } if no path. */
+ struct path path1;
+ /* Second pathname. Initialized with { NULL, NULL } if no path. */
+ struct path path2;
+ /*
+ * Information on @path1, @path1's parent directory, @path2, @path2's
+ * parent directory.
+ */
+ struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
+};
+
/* Structure for entries which follows "struct tomoyo_condition". */
struct tomoyo_condition_element {
/* Left hand operand. */
@@ -733,6 +823,7 @@
void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
void tomoyo_del_condition(struct list_head *element);
void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
+void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
__printf(2, 3);