354 lines
13 KiB
C
354 lines
13 KiB
C
/*
|
|
* security/tomoyo/common.h
|
|
*
|
|
* Common functions for TOMOYO.
|
|
*
|
|
* Copyright (C) 2005-2009 NTT DATA CORPORATION
|
|
*
|
|
* Version: 2.2.0 2009/04/01
|
|
*
|
|
*/
|
|
|
|
#ifndef _SECURITY_TOMOYO_COMMON_H
|
|
#define _SECURITY_TOMOYO_COMMON_H
|
|
|
|
#include <linux/ctype.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/file.h>
|
|
#include <linux/kmod.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/list.h>
|
|
|
|
struct dentry;
|
|
struct vfsmount;
|
|
|
|
/* Temporary buffer for holding pathnames. */
|
|
struct tomoyo_page_buffer {
|
|
char buffer[4096];
|
|
};
|
|
|
|
/* Structure for holding a token. */
|
|
struct tomoyo_path_info {
|
|
const char *name;
|
|
u32 hash; /* = full_name_hash(name, strlen(name)) */
|
|
u16 total_len; /* = strlen(name) */
|
|
u16 const_len; /* = tomoyo_const_part_length(name) */
|
|
bool is_dir; /* = tomoyo_strendswith(name, "/") */
|
|
bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
|
|
u16 depth; /* = tomoyo_path_depth(name) */
|
|
};
|
|
|
|
/*
|
|
* This is the max length of a token.
|
|
*
|
|
* A token consists of only ASCII printable characters.
|
|
* Non printable characters in a token is represented in \ooo style
|
|
* octal string. Thus, \ itself is represented as \\.
|
|
*/
|
|
#define TOMOYO_MAX_PATHNAME_LEN 4000
|
|
|
|
/* Structure for holding requested pathname. */
|
|
struct tomoyo_path_info_with_data {
|
|
/* Keep "head" first, for this pointer is passed to tomoyo_free(). */
|
|
struct tomoyo_path_info head;
|
|
char barrier1[16]; /* Safeguard for overrun. */
|
|
char body[TOMOYO_MAX_PATHNAME_LEN];
|
|
char barrier2[16]; /* Safeguard for overrun. */
|
|
};
|
|
|
|
/*
|
|
* Common header for holding ACL entries.
|
|
*
|
|
* Packing "struct tomoyo_acl_info" allows
|
|
* "struct tomoyo_single_path_acl_record" to embed "u16" and
|
|
* "struct tomoyo_double_path_acl_record" to embed "u8"
|
|
* without enlarging their structure size.
|
|
*/
|
|
struct tomoyo_acl_info {
|
|
struct list_head list;
|
|
/*
|
|
* Type of this ACL entry.
|
|
*
|
|
* MSB is is_deleted flag.
|
|
*/
|
|
u8 type;
|
|
} __packed;
|
|
|
|
/* This ACL entry is deleted. */
|
|
#define TOMOYO_ACL_DELETED 0x80
|
|
|
|
/* Structure for domain information. */
|
|
struct tomoyo_domain_info {
|
|
struct list_head list;
|
|
struct list_head acl_info_list;
|
|
/* Name of this domain. Never NULL. */
|
|
const struct tomoyo_path_info *domainname;
|
|
u8 profile; /* Profile number to use. */
|
|
bool is_deleted; /* Delete flag. */
|
|
bool quota_warned; /* Quota warnning flag. */
|
|
/* DOMAIN_FLAGS_*. Use tomoyo_set_domain_flag() to modify. */
|
|
u8 flags;
|
|
};
|
|
|
|
/* Profile number is an integer between 0 and 255. */
|
|
#define TOMOYO_MAX_PROFILES 256
|
|
|
|
/* Ignore "allow_read" directive in exception policy. */
|
|
#define TOMOYO_DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ 1
|
|
/*
|
|
* This domain was unable to create a new domain at tomoyo_find_next_domain()
|
|
* because the name of the domain to be created was too long or
|
|
* it could not allocate memory.
|
|
* More than one process continued execve() without domain transition.
|
|
*/
|
|
#define TOMOYO_DOMAIN_FLAGS_TRANSITION_FAILED 2
|
|
|
|
/*
|
|
* Structure for "allow_read/write", "allow_execute", "allow_read",
|
|
* "allow_write", "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
|
|
* "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
|
|
* "allow_truncate", "allow_symlink" and "allow_rewrite" directive.
|
|
*/
|
|
struct tomoyo_single_path_acl_record {
|
|
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_SINGLE_PATH_ACL */
|
|
u16 perm;
|
|
/* Pointer to single pathname. */
|
|
const struct tomoyo_path_info *filename;
|
|
};
|
|
|
|
/* Structure for "allow_rename" and "allow_link" directive. */
|
|
struct tomoyo_double_path_acl_record {
|
|
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_DOUBLE_PATH_ACL */
|
|
u8 perm;
|
|
/* Pointer to single pathname. */
|
|
const struct tomoyo_path_info *filename1;
|
|
/* Pointer to single pathname. */
|
|
const struct tomoyo_path_info *filename2;
|
|
};
|
|
|
|
/* Keywords for ACLs. */
|
|
#define TOMOYO_KEYWORD_ALIAS "alias "
|
|
#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
|
|
#define TOMOYO_KEYWORD_DELETE "delete "
|
|
#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
|
|
#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
|
|
#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
|
|
#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
|
|
#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
|
|
#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
|
|
#define TOMOYO_KEYWORD_SELECT "select "
|
|
#define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
|
|
#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
|
|
/* A domain definition starts with <kernel>. */
|
|
#define TOMOYO_ROOT_NAME "<kernel>"
|
|
#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)
|
|
|
|
/* Index numbers for Access Controls. */
|
|
#define TOMOYO_MAC_FOR_FILE 0 /* domain_policy.conf */
|
|
#define TOMOYO_MAX_ACCEPT_ENTRY 1
|
|
#define TOMOYO_VERBOSE 2
|
|
#define TOMOYO_MAX_CONTROL_INDEX 3
|
|
|
|
/* Structure for reading/writing policy via securityfs interfaces. */
|
|
struct tomoyo_io_buffer {
|
|
int (*read) (struct tomoyo_io_buffer *);
|
|
int (*write) (struct tomoyo_io_buffer *);
|
|
/* Exclusive lock for this structure. */
|
|
struct mutex io_sem;
|
|
/* The position currently reading from. */
|
|
struct list_head *read_var1;
|
|
/* Extra variables for reading. */
|
|
struct list_head *read_var2;
|
|
/* The position currently writing to. */
|
|
struct tomoyo_domain_info *write_var1;
|
|
/* The step for reading. */
|
|
int read_step;
|
|
/* Buffer for reading. */
|
|
char *read_buf;
|
|
/* EOF flag for reading. */
|
|
bool read_eof;
|
|
/* Read domain ACL of specified PID? */
|
|
bool read_single_domain;
|
|
/* Extra variable for reading. */
|
|
u8 read_bit;
|
|
/* Bytes available for reading. */
|
|
int read_avail;
|
|
/* Size of read buffer. */
|
|
int readbuf_size;
|
|
/* Buffer for writing. */
|
|
char *write_buf;
|
|
/* Bytes available for writing. */
|
|
int write_avail;
|
|
/* Size of write buffer. */
|
|
int writebuf_size;
|
|
};
|
|
|
|
/* Check whether the domain has too many ACL entries to hold. */
|
|
bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain);
|
|
/* Transactional sprintf() for policy dump. */
|
|
bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
|
|
__attribute__ ((format(printf, 2, 3)));
|
|
/* Check whether the domainname is correct. */
|
|
bool tomoyo_is_correct_domain(const unsigned char *domainname,
|
|
const char *function);
|
|
/* Check whether the token is correct. */
|
|
bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
|
|
const s8 pattern_type, const s8 end_type,
|
|
const char *function);
|
|
/* Check whether the token can be a domainname. */
|
|
bool tomoyo_is_domain_def(const unsigned char *buffer);
|
|
/* Check whether the given filename matches the given pattern. */
|
|
bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
|
|
const struct tomoyo_path_info *pattern);
|
|
/* Read "alias" entry in exception policy. */
|
|
bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head);
|
|
/*
|
|
* Read "initialize_domain" and "no_initialize_domain" entry
|
|
* in exception policy.
|
|
*/
|
|
bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head);
|
|
/* Read "keep_domain" and "no_keep_domain" entry in exception policy. */
|
|
bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head);
|
|
/* Read "file_pattern" entry in exception policy. */
|
|
bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head);
|
|
/* Read "allow_read" entry in exception policy. */
|
|
bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head);
|
|
/* Read "deny_rewrite" entry in exception policy. */
|
|
bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head);
|
|
/* Write domain policy violation warning message to console? */
|
|
bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain);
|
|
/* Convert double path operation to operation name. */
|
|
const char *tomoyo_dp2keyword(const u8 operation);
|
|
/* Get the last component of the given domainname. */
|
|
const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain);
|
|
/* Get warning message. */
|
|
const char *tomoyo_get_msg(const bool is_enforce);
|
|
/* Convert single path operation to operation name. */
|
|
const char *tomoyo_sp2keyword(const u8 operation);
|
|
/* Delete a domain. */
|
|
int tomoyo_delete_domain(char *data);
|
|
/* Create "alias" entry in exception policy. */
|
|
int tomoyo_write_alias_policy(char *data, const bool is_delete);
|
|
/*
|
|
* Create "initialize_domain" and "no_initialize_domain" entry
|
|
* in exception policy.
|
|
*/
|
|
int tomoyo_write_domain_initializer_policy(char *data, const bool is_not,
|
|
const bool is_delete);
|
|
/* Create "keep_domain" and "no_keep_domain" entry in exception policy. */
|
|
int tomoyo_write_domain_keeper_policy(char *data, const bool is_not,
|
|
const bool is_delete);
|
|
/*
|
|
* Create "allow_read/write", "allow_execute", "allow_read", "allow_write",
|
|
* "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
|
|
* "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
|
|
* "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and
|
|
* "allow_link" entry in domain policy.
|
|
*/
|
|
int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
|
|
const bool is_delete);
|
|
/* Create "allow_read" entry in exception policy. */
|
|
int tomoyo_write_globally_readable_policy(char *data, const bool is_delete);
|
|
/* Create "deny_rewrite" entry in exception policy. */
|
|
int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete);
|
|
/* Create "file_pattern" entry in exception policy. */
|
|
int tomoyo_write_pattern_policy(char *data, const bool is_delete);
|
|
/* Find a domain by the given name. */
|
|
struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
|
|
/* Find or create a domain by the given name. */
|
|
struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
|
|
domainname,
|
|
const u8 profile);
|
|
/* Check mode for specified functionality. */
|
|
unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
|
|
const u8 index);
|
|
/* Allocate memory for structures. */
|
|
void *tomoyo_alloc_acl_element(const u8 acl_type);
|
|
/* Fill in "struct tomoyo_path_info" members. */
|
|
void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
|
|
/* Run policy loader when /sbin/init starts. */
|
|
void tomoyo_load_policy(const char *filename);
|
|
/* Change "struct tomoyo_domain_info"->flags. */
|
|
void tomoyo_set_domain_flag(struct tomoyo_domain_info *domain,
|
|
const bool is_delete, const u8 flags);
|
|
|
|
/* strcmp() for "struct tomoyo_path_info" structure. */
|
|
static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
|
|
const struct tomoyo_path_info *b)
|
|
{
|
|
return a->hash != b->hash || strcmp(a->name, b->name);
|
|
}
|
|
|
|
/* Get type of an ACL entry. */
|
|
static inline u8 tomoyo_acl_type1(struct tomoyo_acl_info *ptr)
|
|
{
|
|
return ptr->type & ~TOMOYO_ACL_DELETED;
|
|
}
|
|
|
|
/* Get type of an ACL entry. */
|
|
static inline u8 tomoyo_acl_type2(struct tomoyo_acl_info *ptr)
|
|
{
|
|
return ptr->type;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_is_valid - Check whether the character is a valid char.
|
|
*
|
|
* @c: The character to check.
|
|
*
|
|
* Returns true if @c is a valid character, false otherwise.
|
|
*/
|
|
static inline bool tomoyo_is_valid(const unsigned char c)
|
|
{
|
|
return c > ' ' && c < 127;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_is_invalid - Check whether the character is an invalid char.
|
|
*
|
|
* @c: The character to check.
|
|
*
|
|
* Returns true if @c is an invalid character, false otherwise.
|
|
*/
|
|
static inline bool tomoyo_is_invalid(const unsigned char c)
|
|
{
|
|
return c && (c <= ' ' || c >= 127);
|
|
}
|
|
|
|
/* The list for "struct tomoyo_domain_info". */
|
|
extern struct list_head tomoyo_domain_list;
|
|
extern struct rw_semaphore tomoyo_domain_list_lock;
|
|
|
|
/* Lock for domain->acl_info_list. */
|
|
extern struct rw_semaphore tomoyo_domain_acl_info_list_lock;
|
|
|
|
/* Has /sbin/init started? */
|
|
extern bool tomoyo_policy_loaded;
|
|
|
|
/* The kernel's domain. */
|
|
extern struct tomoyo_domain_info tomoyo_kernel_domain;
|
|
|
|
/**
|
|
* list_for_each_cookie - iterate over a list with cookie.
|
|
* @pos: the &struct list_head to use as a loop cursor.
|
|
* @cookie: the &struct list_head to use as a cookie.
|
|
* @head: the head for your list.
|
|
*
|
|
* Same with list_for_each() except that this primitive uses @cookie
|
|
* so that we can continue iteration.
|
|
* @cookie must be NULL when iteration starts, and @cookie will become
|
|
* NULL when iteration finishes.
|
|
*/
|
|
#define list_for_each_cookie(pos, cookie, head) \
|
|
for (({ if (!cookie) \
|
|
cookie = head; }), \
|
|
pos = (cookie)->next; \
|
|
prefetch(pos->next), pos != (head) || ((cookie) = NULL); \
|
|
(cookie) = pos, pos = pos->next)
|
|
|
|
#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
|