1110 lines
39 KiB
C
1110 lines
39 KiB
C
/*
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* security/tomoyo/common.h
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*
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* Header file for TOMOYO.
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*
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* Copyright (C) 2005-2010 NTT DATA CORPORATION
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*/
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#ifndef _SECURITY_TOMOYO_COMMON_H
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#define _SECURITY_TOMOYO_COMMON_H
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/file.h>
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#include <linux/kmod.h>
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/namei.h>
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#include <linux/mount.h>
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#include <linux/list.h>
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#include <linux/cred.h>
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#include <linux/poll.h>
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struct linux_binprm;
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/********** Constants definitions. **********/
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/*
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* TOMOYO uses this hash only when appending a string into the string
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* table. Frequency of appending strings is very low. So we don't need
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* large (e.g. 64k) hash size. 256 will be sufficient.
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*/
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#define TOMOYO_HASH_BITS 8
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#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
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/*
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* This is the max length of a token.
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*
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* A token consists of only ASCII printable characters.
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* Non printable characters in a token is represented in \ooo style
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* octal string. Thus, \ itself is represented as \\.
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*/
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#define TOMOYO_MAX_PATHNAME_LEN 4000
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/* Profile number is an integer between 0 and 255. */
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#define TOMOYO_MAX_PROFILES 256
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enum tomoyo_mode_index {
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TOMOYO_CONFIG_DISABLED,
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TOMOYO_CONFIG_LEARNING,
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TOMOYO_CONFIG_PERMISSIVE,
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TOMOYO_CONFIG_ENFORCING
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};
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/* Keywords for ACLs. */
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#define TOMOYO_KEYWORD_ALIAS "alias "
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#define TOMOYO_KEYWORD_ALLOW_MOUNT "allow_mount "
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#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
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#define TOMOYO_KEYWORD_DELETE "delete "
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#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
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#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
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#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
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#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
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#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
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#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
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#define TOMOYO_KEYWORD_PATH_GROUP "path_group "
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#define TOMOYO_KEYWORD_NUMBER_GROUP "number_group "
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#define TOMOYO_KEYWORD_SELECT "select "
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#define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
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#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
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#define TOMOYO_KEYWORD_QUOTA_EXCEEDED "quota_exceeded"
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#define TOMOYO_KEYWORD_TRANSITION_FAILED "transition_failed"
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/* A domain definition starts with <kernel>. */
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#define TOMOYO_ROOT_NAME "<kernel>"
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#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)
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/* Value type definition. */
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#define TOMOYO_VALUE_TYPE_INVALID 0
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#define TOMOYO_VALUE_TYPE_DECIMAL 1
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#define TOMOYO_VALUE_TYPE_OCTAL 2
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#define TOMOYO_VALUE_TYPE_HEXADECIMAL 3
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/* Index numbers for Access Controls. */
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enum tomoyo_mac_index {
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TOMOYO_MAC_FOR_FILE, /* domain_policy.conf */
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TOMOYO_MAX_ACCEPT_ENTRY,
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TOMOYO_VERBOSE,
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TOMOYO_MAX_CONTROL_INDEX
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};
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/* Index numbers for Access Controls. */
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enum tomoyo_acl_entry_type_index {
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TOMOYO_TYPE_PATH_ACL,
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TOMOYO_TYPE_PATH2_ACL,
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TOMOYO_TYPE_PATH_NUMBER_ACL,
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TOMOYO_TYPE_PATH_NUMBER3_ACL,
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TOMOYO_TYPE_MOUNT_ACL,
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};
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/* Index numbers for File Controls. */
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/*
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* TOMOYO_TYPE_READ_WRITE is special. TOMOYO_TYPE_READ_WRITE is automatically
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* set if both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are set.
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* Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically set if
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* TOMOYO_TYPE_READ_WRITE is set.
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* TOMOYO_TYPE_READ_WRITE is automatically cleared if either TOMOYO_TYPE_READ
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* or TOMOYO_TYPE_WRITE is cleared.
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* Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically cleared if
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* TOMOYO_TYPE_READ_WRITE is cleared.
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*/
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enum tomoyo_path_acl_index {
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TOMOYO_TYPE_READ_WRITE,
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TOMOYO_TYPE_EXECUTE,
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TOMOYO_TYPE_READ,
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TOMOYO_TYPE_WRITE,
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TOMOYO_TYPE_UNLINK,
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TOMOYO_TYPE_RMDIR,
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TOMOYO_TYPE_TRUNCATE,
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TOMOYO_TYPE_SYMLINK,
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TOMOYO_TYPE_REWRITE,
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TOMOYO_TYPE_CHROOT,
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TOMOYO_TYPE_UMOUNT,
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TOMOYO_MAX_PATH_OPERATION
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};
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enum tomoyo_path_number3_acl_index {
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TOMOYO_TYPE_MKBLOCK,
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TOMOYO_TYPE_MKCHAR,
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TOMOYO_MAX_PATH_NUMBER3_OPERATION
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};
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enum tomoyo_path2_acl_index {
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TOMOYO_TYPE_LINK,
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TOMOYO_TYPE_RENAME,
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TOMOYO_TYPE_PIVOT_ROOT,
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TOMOYO_MAX_PATH2_OPERATION
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};
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enum tomoyo_path_number_acl_index {
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TOMOYO_TYPE_CREATE,
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TOMOYO_TYPE_MKDIR,
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TOMOYO_TYPE_MKFIFO,
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TOMOYO_TYPE_MKSOCK,
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TOMOYO_TYPE_IOCTL,
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TOMOYO_TYPE_CHMOD,
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TOMOYO_TYPE_CHOWN,
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TOMOYO_TYPE_CHGRP,
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TOMOYO_MAX_PATH_NUMBER_OPERATION
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};
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enum tomoyo_securityfs_interface_index {
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TOMOYO_DOMAINPOLICY,
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TOMOYO_EXCEPTIONPOLICY,
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TOMOYO_DOMAIN_STATUS,
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TOMOYO_PROCESS_STATUS,
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TOMOYO_MEMINFO,
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TOMOYO_SELFDOMAIN,
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TOMOYO_VERSION,
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TOMOYO_PROFILE,
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TOMOYO_QUERY,
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TOMOYO_MANAGER
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};
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#define TOMOYO_RETRY_REQUEST 1 /* Retry this request. */
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/********** Structure definitions. **********/
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/*
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* tomoyo_page_buffer is a structure which is used for holding a pathname
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* obtained from "struct dentry" and "struct vfsmount" pair.
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* As of now, it is 4096 bytes. If users complain that 4096 bytes is too small
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* (because TOMOYO escapes non ASCII printable characters using \ooo format),
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* we will make the buffer larger.
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*/
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struct tomoyo_page_buffer {
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char buffer[4096];
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};
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/*
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* tomoyo_request_info is a structure which is used for holding
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*
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* (1) Domain information of current process.
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* (2) How many retries are made for this request.
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* (3) Profile number used for this request.
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* (4) Access control mode of the profile.
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*/
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struct tomoyo_request_info {
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struct tomoyo_domain_info *domain;
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u8 retry;
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u8 profile;
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u8 mode; /* One of tomoyo_mode_index . */
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};
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/*
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* tomoyo_path_info is a structure which is used for holding a string data
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* used by TOMOYO.
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* This structure has several fields for supporting pattern matching.
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*
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* (1) "name" is the '\0' terminated string data.
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* (2) "hash" is full_name_hash(name, strlen(name)).
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* This allows tomoyo_pathcmp() to compare by hash before actually compare
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* using strcmp().
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* (3) "const_len" is the length of the initial segment of "name" which
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* consists entirely of non wildcard characters. In other words, the length
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* which we can compare two strings using strncmp().
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* (4) "is_dir" is a bool which is true if "name" ends with "/",
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* false otherwise.
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* TOMOYO distinguishes directory and non-directory. A directory ends with
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* "/" and non-directory does not end with "/".
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* (5) "is_patterned" is a bool which is true if "name" contains wildcard
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* characters, false otherwise. This allows TOMOYO to use "hash" and
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* strcmp() for string comparison if "is_patterned" is false.
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*/
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struct tomoyo_path_info {
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const char *name;
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u32 hash; /* = full_name_hash(name, strlen(name)) */
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u16 const_len; /* = tomoyo_const_part_length(name) */
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bool is_dir; /* = tomoyo_strendswith(name, "/") */
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bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
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};
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/*
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* tomoyo_name_entry is a structure which is used for linking
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* "struct tomoyo_path_info" into tomoyo_name_list .
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*/
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struct tomoyo_name_entry {
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struct list_head list;
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atomic_t users;
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struct tomoyo_path_info entry;
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};
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/*
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* tomoyo_path_info_with_data is a structure which is used for holding a
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* pathname obtained from "struct dentry" and "struct vfsmount" pair.
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*
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* "struct tomoyo_path_info_with_data" consists of "struct tomoyo_path_info"
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* and buffer for the pathname, while "struct tomoyo_page_buffer" consists of
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* buffer for the pathname only.
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*
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* "struct tomoyo_path_info_with_data" is intended to allow TOMOYO to release
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* both "struct tomoyo_path_info" and buffer for the pathname by single kfree()
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* so that we don't need to return two pointers to the caller. If the caller
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* puts "struct tomoyo_path_info" on stack memory, we will be able to remove
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* "struct tomoyo_path_info_with_data".
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*/
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struct tomoyo_path_info_with_data {
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/* Keep "head" first, for this pointer is passed to kfree(). */
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struct tomoyo_path_info head;
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char barrier1[16]; /* Safeguard for overrun. */
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char body[TOMOYO_MAX_PATHNAME_LEN];
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char barrier2[16]; /* Safeguard for overrun. */
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};
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struct tomoyo_name_union {
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const struct tomoyo_path_info *filename;
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struct tomoyo_path_group *group;
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u8 is_group;
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};
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struct tomoyo_number_union {
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unsigned long values[2];
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struct tomoyo_number_group *group;
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u8 min_type;
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u8 max_type;
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u8 is_group;
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};
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/* Structure for "path_group" directive. */
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struct tomoyo_path_group {
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struct list_head list;
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const struct tomoyo_path_info *group_name;
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struct list_head member_list;
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atomic_t users;
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};
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/* Structure for "number_group" directive. */
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struct tomoyo_number_group {
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struct list_head list;
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const struct tomoyo_path_info *group_name;
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struct list_head member_list;
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atomic_t users;
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};
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/* Structure for "path_group" directive. */
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struct tomoyo_path_group_member {
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struct list_head list;
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bool is_deleted;
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const struct tomoyo_path_info *member_name;
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};
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/* Structure for "number_group" directive. */
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struct tomoyo_number_group_member {
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struct list_head list;
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bool is_deleted;
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struct tomoyo_number_union number;
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};
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/*
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* tomoyo_acl_info is a structure which is used for holding
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*
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* (1) "list" which is linked to the ->acl_info_list of
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* "struct tomoyo_domain_info"
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* (2) "type" which tells type of the entry (either
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* "struct tomoyo_path_acl" or "struct tomoyo_path2_acl").
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*
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* Packing "struct tomoyo_acl_info" allows
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* "struct tomoyo_path_acl" to embed "u8" + "u16" and
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* "struct tomoyo_path2_acl" to embed "u8"
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* without enlarging their structure size.
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*/
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struct tomoyo_acl_info {
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struct list_head list;
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u8 type;
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} __packed;
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/*
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* tomoyo_domain_info is a structure which is used for holding permissions
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* (e.g. "allow_read /lib/libc-2.5.so") given to each domain.
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* It has following fields.
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*
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* (1) "list" which is linked to tomoyo_domain_list .
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* (2) "acl_info_list" which is linked to "struct tomoyo_acl_info".
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* (3) "domainname" which holds the name of the domain.
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* (4) "profile" which remembers profile number assigned to this domain.
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* (5) "is_deleted" is a bool which is true if this domain is marked as
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* "deleted", false otherwise.
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* (6) "quota_warned" is a bool which is used for suppressing warning message
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* when learning mode learned too much entries.
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* (7) "ignore_global_allow_read" is a bool which is true if this domain
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* should ignore "allow_read" directive in exception policy.
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* (8) "transition_failed" is a bool which is set to true when this domain was
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* unable to create a new domain at tomoyo_find_next_domain() because the
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* name of the domain to be created was too long or it could not allocate
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* memory. If set to true, more than one process continued execve()
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* without domain transition.
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* (9) "users" is an atomic_t that holds how many "struct cred"->security
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* are referring this "struct tomoyo_domain_info". If is_deleted == true
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* and users == 0, this struct will be kfree()d upon next garbage
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* collection.
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*
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* A domain's lifecycle is an analogy of files on / directory.
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* Multiple domains with the same domainname cannot be created (as with
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* creating files with the same filename fails with -EEXIST).
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* If a process reached a domain, that process can reside in that domain after
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* that domain is marked as "deleted" (as with a process can access an already
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* open()ed file after that file was unlink()ed).
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*/
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struct tomoyo_domain_info {
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struct list_head list;
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struct list_head acl_info_list;
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/* Name of this domain. Never NULL. */
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const struct tomoyo_path_info *domainname;
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u8 profile; /* Profile number to use. */
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bool is_deleted; /* Delete flag. */
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bool quota_warned; /* Quota warnning flag. */
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bool ignore_global_allow_read; /* Ignore "allow_read" flag. */
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bool transition_failed; /* Domain transition failed flag. */
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atomic_t users; /* Number of referring credentials. */
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};
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/*
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* tomoyo_path_acl is a structure which is used for holding an
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* entry with one pathname operation (e.g. open(), mkdir()).
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* It has following fields.
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*
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* (1) "head" which is a "struct tomoyo_acl_info".
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* (2) "perm" which is a bitmask of permitted operations.
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* (3) "name" is the pathname.
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*
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* Directives held by this structure are "allow_read/write", "allow_execute",
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* "allow_read", "allow_write", "allow_unlink", "allow_rmdir",
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* "allow_truncate", "allow_symlink", "allow_rewrite", "allow_chroot" and
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* "allow_unmount".
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*/
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struct tomoyo_path_acl {
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struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
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u16 perm;
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struct tomoyo_name_union name;
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};
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/*
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* tomoyo_path_number_acl is a structure which is used for holding an
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* entry with one pathname and one number operation.
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* It has following fields.
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*
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* (1) "head" which is a "struct tomoyo_acl_info".
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* (2) "perm" which is a bitmask of permitted operations.
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* (3) "name" is the pathname.
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* (4) "number" is the numeric value.
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*
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* Directives held by this structure are "allow_create", "allow_mkdir",
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* "allow_ioctl", "allow_mkfifo", "allow_mksock", "allow_chmod", "allow_chown"
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* and "allow_chgrp".
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*
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*/
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struct tomoyo_path_number_acl {
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struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
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u8 perm;
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struct tomoyo_name_union name;
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struct tomoyo_number_union number;
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};
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/*
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* tomoyo_path_number3_acl is a structure which is used for holding an
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* entry with one pathname and three numbers operation.
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* It has following fields.
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*
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* (1) "head" which is a "struct tomoyo_acl_info".
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* (2) "perm" which is a bitmask of permitted operations.
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* (3) "mode" is the create mode.
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* (4) "major" is the major number of device node.
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* (5) "minor" is the minor number of device node.
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*
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* Directives held by this structure are "allow_mkchar", "allow_mkblock".
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*
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*/
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struct tomoyo_path_number3_acl {
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struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER3_ACL */
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u8 perm;
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struct tomoyo_name_union name;
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struct tomoyo_number_union mode;
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struct tomoyo_number_union major;
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struct tomoyo_number_union minor;
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};
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/*
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* tomoyo_path2_acl is a structure which is used for holding an
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* entry with two pathnames operation (i.e. link(), rename() and pivot_root()).
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* It has following fields.
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*
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* (1) "head" which is a "struct tomoyo_acl_info".
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* (2) "perm" which is a bitmask of permitted operations.
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* (3) "name1" is the source/old pathname.
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* (4) "name2" is the destination/new pathname.
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*
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* Directives held by this structure are "allow_rename", "allow_link" and
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* "allow_pivot_root".
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*/
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struct tomoyo_path2_acl {
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struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
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u8 perm;
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struct tomoyo_name_union name1;
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struct tomoyo_name_union name2;
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};
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|
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/*
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* tomoyo_mount_acl is a structure which is used for holding an
|
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* entry for mount operation.
|
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* It has following fields.
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*
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* (1) "head" which is a "struct tomoyo_acl_info".
|
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* (2) "is_deleted" is boolean.
|
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* (3) "dev_name" is the device name.
|
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* (4) "dir_name" is the mount point.
|
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* (5) "flags" is the mount flags.
|
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*
|
|
* Directives held by this structure are "allow_rename", "allow_link" and
|
|
* "allow_pivot_root".
|
|
*/
|
|
struct tomoyo_mount_acl {
|
|
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
|
|
bool is_deleted;
|
|
struct tomoyo_name_union dev_name;
|
|
struct tomoyo_name_union dir_name;
|
|
struct tomoyo_name_union fs_type;
|
|
struct tomoyo_number_union flags;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_io_buffer is a structure which is used for reading and modifying
|
|
* configuration via /sys/kernel/security/tomoyo/ interface.
|
|
* It has many fields. ->read_var1 , ->read_var2 , ->write_var1 are used as
|
|
* cursors.
|
|
*
|
|
* Since the content of /sys/kernel/security/tomoyo/domain_policy is a list of
|
|
* "struct tomoyo_domain_info" entries and each "struct tomoyo_domain_info"
|
|
* entry has a list of "struct tomoyo_acl_info", we need two cursors when
|
|
* reading (one is for traversing tomoyo_domain_list and the other is for
|
|
* traversing "struct tomoyo_acl_info"->acl_info_list ).
|
|
*
|
|
* If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
|
|
* "select ", TOMOYO seeks the cursor ->read_var1 and ->write_var1 to the
|
|
* domain with the domainname specified by the rest of that line (NULL is set
|
|
* if seek failed).
|
|
* If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
|
|
* "delete ", TOMOYO deletes an entry or a domain specified by the rest of that
|
|
* line (->write_var1 is set to NULL if a domain was deleted).
|
|
* If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
|
|
* neither "select " nor "delete ", an entry or a domain specified by that line
|
|
* is appended.
|
|
*/
|
|
struct tomoyo_io_buffer {
|
|
int (*read) (struct tomoyo_io_buffer *);
|
|
int (*write) (struct tomoyo_io_buffer *);
|
|
int (*poll) (struct file *file, poll_table *wait);
|
|
/* Exclusive lock for this structure. */
|
|
struct mutex io_sem;
|
|
/* Index returned by tomoyo_read_lock(). */
|
|
int reader_idx;
|
|
/* 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;
|
|
/* Type of this interface. */
|
|
u8 type;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_globally_readable_file_entry is a structure which is used for holding
|
|
* "allow_read" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_globally_readable_list .
|
|
* (2) "filename" is a pathname which is allowed to open(O_RDONLY).
|
|
* (3) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
*/
|
|
struct tomoyo_globally_readable_file_entry {
|
|
struct list_head list;
|
|
const struct tomoyo_path_info *filename;
|
|
bool is_deleted;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_pattern_entry is a structure which is used for holding
|
|
* "tomoyo_pattern_list" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_pattern_list .
|
|
* (2) "pattern" is a pathname pattern which is used for converting pathnames
|
|
* to pathname patterns during learning mode.
|
|
* (3) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
*/
|
|
struct tomoyo_pattern_entry {
|
|
struct list_head list;
|
|
const struct tomoyo_path_info *pattern;
|
|
bool is_deleted;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_no_rewrite_entry is a structure which is used for holding
|
|
* "deny_rewrite" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_no_rewrite_list .
|
|
* (2) "pattern" is a pathname which is by default not permitted to modify
|
|
* already existing content.
|
|
* (3) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
*/
|
|
struct tomoyo_no_rewrite_entry {
|
|
struct list_head list;
|
|
const struct tomoyo_path_info *pattern;
|
|
bool is_deleted;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_domain_initializer_entry is a structure which is used for holding
|
|
* "initialize_domain" and "no_initialize_domain" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_domain_initializer_list .
|
|
* (2) "domainname" which is "a domainname" or "the last component of a
|
|
* domainname". This field is NULL if "from" clause is not specified.
|
|
* (3) "program" which is a program's pathname.
|
|
* (4) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
* (5) "is_not" is a bool which is true if "no_initialize_domain", false
|
|
* otherwise.
|
|
* (6) "is_last_name" is a bool which is true if "domainname" is "the last
|
|
* component of a domainname", false otherwise.
|
|
*/
|
|
struct tomoyo_domain_initializer_entry {
|
|
struct list_head list;
|
|
const struct tomoyo_path_info *domainname; /* This may be NULL */
|
|
const struct tomoyo_path_info *program;
|
|
bool is_deleted;
|
|
bool is_not; /* True if this entry is "no_initialize_domain". */
|
|
/* True if the domainname is tomoyo_get_last_name(). */
|
|
bool is_last_name;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_domain_keeper_entry is a structure which is used for holding
|
|
* "keep_domain" and "no_keep_domain" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_domain_keeper_list .
|
|
* (2) "domainname" which is "a domainname" or "the last component of a
|
|
* domainname".
|
|
* (3) "program" which is a program's pathname.
|
|
* This field is NULL if "from" clause is not specified.
|
|
* (4) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
* (5) "is_not" is a bool which is true if "no_initialize_domain", false
|
|
* otherwise.
|
|
* (6) "is_last_name" is a bool which is true if "domainname" is "the last
|
|
* component of a domainname", false otherwise.
|
|
*/
|
|
struct tomoyo_domain_keeper_entry {
|
|
struct list_head list;
|
|
const struct tomoyo_path_info *domainname;
|
|
const struct tomoyo_path_info *program; /* This may be NULL */
|
|
bool is_deleted;
|
|
bool is_not; /* True if this entry is "no_keep_domain". */
|
|
/* True if the domainname is tomoyo_get_last_name(). */
|
|
bool is_last_name;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_alias_entry is a structure which is used for holding "alias" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_alias_list .
|
|
* (2) "original_name" which is a dereferenced pathname.
|
|
* (3) "aliased_name" which is a symlink's pathname.
|
|
* (4) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
*/
|
|
struct tomoyo_alias_entry {
|
|
struct list_head list;
|
|
const struct tomoyo_path_info *original_name;
|
|
const struct tomoyo_path_info *aliased_name;
|
|
bool is_deleted;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_policy_manager_entry is a structure which is used for holding list of
|
|
* domainnames or programs which are permitted to modify configuration via
|
|
* /sys/kernel/security/tomoyo/ interface.
|
|
* It has following fields.
|
|
*
|
|
* (1) "list" which is linked to tomoyo_policy_manager_list .
|
|
* (2) "manager" is a domainname or a program's pathname.
|
|
* (3) "is_domain" is a bool which is true if "manager" is a domainname, false
|
|
* otherwise.
|
|
* (4) "is_deleted" is a bool which is true if marked as deleted, false
|
|
* otherwise.
|
|
*/
|
|
struct tomoyo_policy_manager_entry {
|
|
struct list_head list;
|
|
/* A path to program or a domainname. */
|
|
const struct tomoyo_path_info *manager;
|
|
bool is_domain; /* True if manager is a domainname. */
|
|
bool is_deleted; /* True if this entry is deleted. */
|
|
};
|
|
|
|
/********** Function prototypes. **********/
|
|
|
|
extern asmlinkage long sys_getpid(void);
|
|
extern asmlinkage long sys_getppid(void);
|
|
|
|
/* Check whether the given string starts with the given keyword. */
|
|
bool tomoyo_str_starts(char **src, const char *find);
|
|
/* Get tomoyo_realpath() of current process. */
|
|
const char *tomoyo_get_exe(void);
|
|
/* Format string. */
|
|
void tomoyo_normalize_line(unsigned char *buffer);
|
|
/* Print warning or error message on console. */
|
|
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
|
|
__attribute__ ((format(printf, 2, 3)));
|
|
/* Check all profiles currently assigned to domains are defined. */
|
|
void tomoyo_check_profile(void);
|
|
/* Open operation for /sys/kernel/security/tomoyo/ interface. */
|
|
int tomoyo_open_control(const u8 type, struct file *file);
|
|
/* Close /sys/kernel/security/tomoyo/ interface. */
|
|
int tomoyo_close_control(struct file *file);
|
|
/* Read operation for /sys/kernel/security/tomoyo/ interface. */
|
|
int tomoyo_read_control(struct file *file, char __user *buffer,
|
|
const int buffer_len);
|
|
/* Write operation for /sys/kernel/security/tomoyo/ interface. */
|
|
int tomoyo_write_control(struct file *file, const char __user *buffer,
|
|
const int buffer_len);
|
|
/* Check whether the domain has too many ACL entries to hold. */
|
|
bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
|
|
/* Print out of memory warning message. */
|
|
void tomoyo_warn_oom(const char *function);
|
|
/* Check whether the given name matches the given name_union. */
|
|
bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
|
|
const struct tomoyo_name_union *ptr);
|
|
/* Check whether the given number matches the given number_union. */
|
|
bool tomoyo_compare_number_union(const unsigned long value,
|
|
const struct tomoyo_number_union *ptr);
|
|
/* 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);
|
|
/* 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);
|
|
/* Check whether the token can be a domainname. */
|
|
bool tomoyo_is_domain_def(const unsigned char *buffer);
|
|
bool tomoyo_parse_name_union(const char *filename,
|
|
struct tomoyo_name_union *ptr);
|
|
/* Check whether the given filename matches the given path_group. */
|
|
bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
|
|
const struct tomoyo_path_group *group,
|
|
const bool may_use_pattern);
|
|
/* Check whether the given value matches the given number_group. */
|
|
bool tomoyo_number_matches_group(const unsigned long min,
|
|
const unsigned long max,
|
|
const struct tomoyo_number_group *group);
|
|
/* 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);
|
|
|
|
bool tomoyo_print_number_union(struct tomoyo_io_buffer *head,
|
|
const struct tomoyo_number_union *ptr);
|
|
bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num);
|
|
|
|
/* 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 "path_group" entry in exception policy. */
|
|
bool tomoyo_read_path_group_policy(struct tomoyo_io_buffer *head);
|
|
/* Read "number_group" entry in exception policy. */
|
|
bool tomoyo_read_number_group_policy(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);
|
|
/* Tokenize a line. */
|
|
bool tomoyo_tokenize(char *buffer, char *w[], size_t size);
|
|
/* 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_path22keyword(const u8 operation);
|
|
const char *tomoyo_path_number2keyword(const u8 operation);
|
|
const char *tomoyo_path_number32keyword(const u8 operation);
|
|
/* Get the last component of the given domainname. */
|
|
const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain);
|
|
/* Convert single path operation to operation name. */
|
|
const char *tomoyo_path2keyword(const u8 operation);
|
|
/* Fill "struct tomoyo_request_info". */
|
|
int tomoyo_init_request_info(struct tomoyo_request_info *r,
|
|
struct tomoyo_domain_info *domain);
|
|
/* Check permission for mount operation. */
|
|
int tomoyo_mount_permission(char *dev_name, struct path *path, char *type,
|
|
unsigned long flags, void *data_page);
|
|
/* 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 "allow_mount" entry in domain policy. */
|
|
int tomoyo_write_mount_policy(char *data, struct tomoyo_domain_info *domain,
|
|
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);
|
|
/* Create "path_group" entry in exception policy. */
|
|
int tomoyo_write_path_group_policy(char *data, const bool is_delete);
|
|
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
|
|
__attribute__ ((format(printf, 2, 3)));
|
|
/* Create "number_group" entry in exception policy. */
|
|
int tomoyo_write_number_group_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);
|
|
/* Allocate memory for "struct tomoyo_path_group". */
|
|
struct tomoyo_path_group *tomoyo_get_path_group(const char *group_name);
|
|
struct tomoyo_number_group *tomoyo_get_number_group(const char *group_name);
|
|
|
|
/* Check mode for specified functionality. */
|
|
unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
|
|
const u8 index);
|
|
/* 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);
|
|
|
|
void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
|
|
|
|
/* Convert binary string to ascii string. */
|
|
int tomoyo_encode(char *buffer, int buflen, const char *str);
|
|
|
|
/* Returns realpath(3) of the given pathname but ignores chroot'ed root. */
|
|
int tomoyo_realpath_from_path2(struct path *path, char *newname,
|
|
int newname_len);
|
|
|
|
/*
|
|
* Returns realpath(3) of the given pathname but ignores chroot'ed root.
|
|
* These functions use kzalloc(), so the caller must call kfree()
|
|
* if these functions didn't return NULL.
|
|
*/
|
|
char *tomoyo_realpath(const char *pathname);
|
|
/*
|
|
* Same with tomoyo_realpath() except that it doesn't follow the final symlink.
|
|
*/
|
|
char *tomoyo_realpath_nofollow(const char *pathname);
|
|
/* Same with tomoyo_realpath() except that the pathname is already solved. */
|
|
char *tomoyo_realpath_from_path(struct path *path);
|
|
/* Get patterned pathname. */
|
|
const char *tomoyo_file_pattern(const struct tomoyo_path_info *filename);
|
|
|
|
/* Check memory quota. */
|
|
bool tomoyo_memory_ok(void *ptr);
|
|
void *tomoyo_commit_ok(void *data, const unsigned int size);
|
|
|
|
/*
|
|
* Keep the given name on the RAM.
|
|
* The RAM is shared, so NEVER try to modify or kfree() the returned name.
|
|
*/
|
|
const struct tomoyo_path_info *tomoyo_get_name(const char *name);
|
|
|
|
/* Check for memory usage. */
|
|
int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
|
|
|
|
/* Set memory quota. */
|
|
int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
|
|
|
|
/* Initialize mm related code. */
|
|
void __init tomoyo_mm_init(void);
|
|
int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
|
|
const struct tomoyo_path_info *filename);
|
|
int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
|
|
struct path *path, const int flag);
|
|
int tomoyo_path_number_perm(const u8 operation, struct path *path,
|
|
unsigned long number);
|
|
int tomoyo_path_number3_perm(const u8 operation, struct path *path,
|
|
const unsigned int mode, unsigned int dev);
|
|
int tomoyo_path_perm(const u8 operation, struct path *path);
|
|
int tomoyo_path2_perm(const u8 operation, struct path *path1,
|
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struct path *path2);
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int tomoyo_find_next_domain(struct linux_binprm *bprm);
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void tomoyo_print_ulong(char *buffer, const int buffer_len,
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const unsigned long value, const u8 type);
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/* Drop refcount on tomoyo_name_union. */
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void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
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/* Run garbage collector. */
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void tomoyo_run_gc(void);
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void tomoyo_memory_free(void *ptr);
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/********** External variable definitions. **********/
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/* Lock for GC. */
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extern struct srcu_struct tomoyo_ss;
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/* The list for "struct tomoyo_domain_info". */
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extern struct list_head tomoyo_domain_list;
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extern struct list_head tomoyo_path_group_list;
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extern struct list_head tomoyo_number_group_list;
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extern struct list_head tomoyo_domain_initializer_list;
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extern struct list_head tomoyo_domain_keeper_list;
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extern struct list_head tomoyo_alias_list;
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extern struct list_head tomoyo_globally_readable_list;
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extern struct list_head tomoyo_pattern_list;
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extern struct list_head tomoyo_no_rewrite_list;
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extern struct list_head tomoyo_policy_manager_list;
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extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
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/* Lock for protecting policy. */
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extern struct mutex tomoyo_policy_lock;
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/* Has /sbin/init started? */
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extern bool tomoyo_policy_loaded;
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/* The kernel's domain. */
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extern struct tomoyo_domain_info tomoyo_kernel_domain;
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extern unsigned int tomoyo_quota_for_query;
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extern unsigned int tomoyo_query_memory_size;
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/********** Inlined functions. **********/
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static inline int tomoyo_read_lock(void)
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{
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return srcu_read_lock(&tomoyo_ss);
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}
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static inline void tomoyo_read_unlock(int idx)
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{
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srcu_read_unlock(&tomoyo_ss, idx);
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}
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/* strcmp() for "struct tomoyo_path_info" structure. */
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static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
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const struct tomoyo_path_info *b)
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{
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return a->hash != b->hash || strcmp(a->name, b->name);
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}
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/**
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* tomoyo_is_valid - Check whether the character is a valid char.
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*
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* @c: The character to check.
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*
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* Returns true if @c is a valid character, false otherwise.
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*/
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static inline bool tomoyo_is_valid(const unsigned char c)
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{
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return c > ' ' && c < 127;
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}
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/**
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* tomoyo_is_invalid - Check whether the character is an invalid char.
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*
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* @c: The character to check.
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*
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* Returns true if @c is an invalid character, false otherwise.
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*/
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static inline bool tomoyo_is_invalid(const unsigned char c)
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{
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return c && (c <= ' ' || c >= 127);
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}
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static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
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{
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if (name) {
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struct tomoyo_name_entry *ptr =
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container_of(name, struct tomoyo_name_entry, entry);
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atomic_dec(&ptr->users);
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}
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}
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static inline void tomoyo_put_path_group(struct tomoyo_path_group *group)
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{
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if (group)
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atomic_dec(&group->users);
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}
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static inline void tomoyo_put_number_group(struct tomoyo_number_group *group)
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{
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if (group)
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atomic_dec(&group->users);
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}
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static inline struct tomoyo_domain_info *tomoyo_domain(void)
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{
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return current_cred()->security;
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}
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static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
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*task)
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{
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return task_cred_xxx(task, security);
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}
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static inline bool tomoyo_is_same_acl_head(const struct tomoyo_acl_info *p1,
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const struct tomoyo_acl_info *p2)
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{
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return p1->type == p2->type;
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}
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static inline bool tomoyo_is_same_name_union
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(const struct tomoyo_name_union *p1, const struct tomoyo_name_union *p2)
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{
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return p1->filename == p2->filename && p1->group == p2->group &&
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p1->is_group == p2->is_group;
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}
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static inline bool tomoyo_is_same_number_union
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(const struct tomoyo_number_union *p1, const struct tomoyo_number_union *p2)
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{
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return p1->values[0] == p2->values[0] && p1->values[1] == p2->values[1]
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&& p1->group == p2->group && p1->min_type == p2->min_type &&
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p1->max_type == p2->max_type && p1->is_group == p2->is_group;
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}
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static inline bool tomoyo_is_same_path_acl(const struct tomoyo_path_acl *p1,
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const struct tomoyo_path_acl *p2)
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{
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return tomoyo_is_same_acl_head(&p1->head, &p2->head) &&
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tomoyo_is_same_name_union(&p1->name, &p2->name);
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}
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static inline bool tomoyo_is_same_path_number3_acl
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(const struct tomoyo_path_number3_acl *p1,
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const struct tomoyo_path_number3_acl *p2)
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{
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return tomoyo_is_same_acl_head(&p1->head, &p2->head)
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&& tomoyo_is_same_name_union(&p1->name, &p2->name)
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&& tomoyo_is_same_number_union(&p1->mode, &p2->mode)
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&& tomoyo_is_same_number_union(&p1->major, &p2->major)
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&& tomoyo_is_same_number_union(&p1->minor, &p2->minor);
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}
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static inline bool tomoyo_is_same_path2_acl(const struct tomoyo_path2_acl *p1,
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const struct tomoyo_path2_acl *p2)
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{
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return tomoyo_is_same_acl_head(&p1->head, &p2->head) &&
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tomoyo_is_same_name_union(&p1->name1, &p2->name1) &&
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tomoyo_is_same_name_union(&p1->name2, &p2->name2);
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}
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static inline bool tomoyo_is_same_path_number_acl
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(const struct tomoyo_path_number_acl *p1,
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const struct tomoyo_path_number_acl *p2)
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{
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return tomoyo_is_same_acl_head(&p1->head, &p2->head)
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&& tomoyo_is_same_name_union(&p1->name, &p2->name)
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&& tomoyo_is_same_number_union(&p1->number, &p2->number);
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}
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static inline bool tomoyo_is_same_mount_acl(const struct tomoyo_mount_acl *p1,
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const struct tomoyo_mount_acl *p2)
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{
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return tomoyo_is_same_acl_head(&p1->head, &p2->head) &&
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tomoyo_is_same_name_union(&p1->dev_name, &p2->dev_name) &&
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tomoyo_is_same_name_union(&p1->dir_name, &p2->dir_name) &&
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tomoyo_is_same_name_union(&p1->fs_type, &p2->fs_type) &&
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tomoyo_is_same_number_union(&p1->flags, &p2->flags);
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}
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static inline bool tomoyo_is_same_domain_initializer_entry
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(const struct tomoyo_domain_initializer_entry *p1,
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const struct tomoyo_domain_initializer_entry *p2)
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{
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return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name
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&& p1->domainname == p2->domainname
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&& p1->program == p2->program;
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}
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static inline bool tomoyo_is_same_domain_keeper_entry
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(const struct tomoyo_domain_keeper_entry *p1,
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const struct tomoyo_domain_keeper_entry *p2)
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{
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return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name
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&& p1->domainname == p2->domainname
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&& p1->program == p2->program;
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}
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static inline bool tomoyo_is_same_alias_entry
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(const struct tomoyo_alias_entry *p1, const struct tomoyo_alias_entry *p2)
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{
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return p1->original_name == p2->original_name &&
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p1->aliased_name == p2->aliased_name;
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}
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/**
|
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* list_for_each_cookie - iterate over a list with cookie.
|
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* @pos: the &struct list_head to use as a loop cursor.
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* @cookie: the &struct list_head to use as a cookie.
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* @head: the head for your list.
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*
|
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* Same with list_for_each_rcu() except that this primitive uses @cookie
|
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* so that we can continue iteration.
|
|
* @cookie must be NULL when iteration starts, and @cookie will become
|
|
* NULL when iteration finishes.
|
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*/
|
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#define list_for_each_cookie(pos, cookie, head) \
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for (({ if (!cookie) \
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cookie = head; }), \
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pos = rcu_dereference((cookie)->next); \
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prefetch(pos->next), pos != (head) || ((cookie) = NULL); \
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(cookie) = pos, pos = rcu_dereference(pos->next))
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#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
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