1013 lines
32 KiB
C
1013 lines
32 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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#define TOMOYO_EXEC_TMPSIZE 4096
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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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TOMOYO_CONFIG_USE_DEFAULT = 255
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};
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enum tomoyo_policy_id {
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TOMOYO_ID_GROUP,
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TOMOYO_ID_PATH_GROUP,
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TOMOYO_ID_NUMBER_GROUP,
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TOMOYO_ID_TRANSITION_CONTROL,
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TOMOYO_ID_AGGREGATOR,
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TOMOYO_ID_GLOBALLY_READABLE,
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TOMOYO_ID_PATTERN,
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TOMOYO_ID_NO_REWRITE,
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TOMOYO_ID_MANAGER,
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TOMOYO_ID_NAME,
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TOMOYO_ID_ACL,
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TOMOYO_ID_DOMAIN,
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TOMOYO_MAX_POLICY
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};
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enum tomoyo_group_id {
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TOMOYO_PATH_GROUP,
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TOMOYO_NUMBER_GROUP,
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TOMOYO_MAX_GROUP
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};
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/* Keywords for ACLs. */
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#define TOMOYO_KEYWORD_AGGREGATOR "aggregator "
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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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enum tomoyo_transition_type {
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/* Do not change this order, */
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TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
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TOMOYO_TRANSITION_CONTROL_INITIALIZE,
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TOMOYO_TRANSITION_CONTROL_NO_KEEP,
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TOMOYO_TRANSITION_CONTROL_KEEP,
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TOMOYO_MAX_TRANSITION_TYPE
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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_MKDEV_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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#define TOMOYO_RW_MASK ((1 << TOMOYO_TYPE_READ) | (1 << TOMOYO_TYPE_WRITE))
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enum tomoyo_mkdev_acl_index {
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TOMOYO_TYPE_MKBLOCK,
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TOMOYO_TYPE_MKCHAR,
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TOMOYO_MAX_MKDEV_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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enum tomoyo_mac_index {
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TOMOYO_MAC_FILE_EXECUTE,
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TOMOYO_MAC_FILE_OPEN,
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TOMOYO_MAC_FILE_CREATE,
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TOMOYO_MAC_FILE_UNLINK,
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TOMOYO_MAC_FILE_MKDIR,
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TOMOYO_MAC_FILE_RMDIR,
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TOMOYO_MAC_FILE_MKFIFO,
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TOMOYO_MAC_FILE_MKSOCK,
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TOMOYO_MAC_FILE_TRUNCATE,
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TOMOYO_MAC_FILE_SYMLINK,
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TOMOYO_MAC_FILE_REWRITE,
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TOMOYO_MAC_FILE_MKBLOCK,
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TOMOYO_MAC_FILE_MKCHAR,
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TOMOYO_MAC_FILE_LINK,
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TOMOYO_MAC_FILE_RENAME,
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TOMOYO_MAC_FILE_CHMOD,
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TOMOYO_MAC_FILE_CHOWN,
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TOMOYO_MAC_FILE_CHGRP,
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TOMOYO_MAC_FILE_IOCTL,
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TOMOYO_MAC_FILE_CHROOT,
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TOMOYO_MAC_FILE_MOUNT,
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TOMOYO_MAC_FILE_UMOUNT,
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TOMOYO_MAC_FILE_PIVOT_ROOT,
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TOMOYO_MAX_MAC_INDEX
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};
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enum tomoyo_mac_category_index {
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TOMOYO_MAC_CATEGORY_FILE,
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TOMOYO_MAX_MAC_CATEGORY_INDEX
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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_acl_head is a structure which is used for holding elements not in
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* domain policy.
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* It has following fields.
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*
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* (1) "list" which is linked to tomoyo_policy_list[] .
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* (2) "is_deleted" is a bool which is true if marked as deleted, false
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* otherwise.
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*/
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struct tomoyo_acl_head {
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struct list_head list;
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bool is_deleted;
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} __packed;
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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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/* For holding parameters. */
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union {
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struct {
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const struct tomoyo_path_info *filename;
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u8 operation;
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} path;
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struct {
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const struct tomoyo_path_info *filename1;
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const struct tomoyo_path_info *filename2;
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u8 operation;
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} path2;
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struct {
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const struct tomoyo_path_info *filename;
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unsigned int mode;
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unsigned int major;
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unsigned int minor;
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u8 operation;
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} mkdev;
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struct {
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const struct tomoyo_path_info *filename;
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unsigned long number;
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u8 operation;
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} path_number;
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struct {
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const struct tomoyo_path_info *type;
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const struct tomoyo_path_info *dir;
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const struct tomoyo_path_info *dev;
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unsigned long flags;
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int need_dev;
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} mount;
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} param;
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u8 param_type;
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bool granted;
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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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u8 type;
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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 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 {
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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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struct tomoyo_name_union {
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const struct tomoyo_path_info *filename;
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struct tomoyo_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_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"/"number_group" directive. */
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struct tomoyo_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 {
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struct tomoyo_acl_head head;
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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 {
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struct tomoyo_acl_head head;
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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) "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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* (3) "type" which tells type of the entry.
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*
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* Packing "struct tomoyo_acl_info" allows
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* "struct tomoyo_path_acl" to embed "u16" and "struct tomoyo_path2_acl"
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* "struct tomoyo_path_number_acl" "struct tomoyo_mkdev_acl" to embed
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* "u8" 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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bool is_deleted;
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u8 type; /* = one of values in "enum tomoyo_acl_entry_type_index". */
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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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/*
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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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/*
|
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* tomoyo_mkdev_acl is a structure which is used for holding an
|
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* entry with one pathname and three numbers operation.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" which is a "struct tomoyo_acl_info".
|
|
* (2) "perm" which is a bitmask of permitted operations.
|
|
* (3) "mode" is the create mode.
|
|
* (4) "major" is the major number of device node.
|
|
* (5) "minor" is the minor number of device node.
|
|
*
|
|
* Directives held by this structure are "allow_mkchar", "allow_mkblock".
|
|
*
|
|
*/
|
|
struct tomoyo_mkdev_acl {
|
|
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
|
|
u8 perm;
|
|
struct tomoyo_name_union name;
|
|
struct tomoyo_number_union mode;
|
|
struct tomoyo_number_union major;
|
|
struct tomoyo_number_union minor;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_path2_acl is a structure which is used for holding an
|
|
* entry with two pathnames operation (i.e. link(), rename() and pivot_root()).
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" which is a "struct tomoyo_acl_info".
|
|
* (2) "perm" which is a bitmask of permitted operations.
|
|
* (3) "name1" is the source/old pathname.
|
|
* (4) "name2" is the destination/new pathname.
|
|
*
|
|
* Directives held by this structure are "allow_rename", "allow_link" and
|
|
* "allow_pivot_root".
|
|
*/
|
|
struct tomoyo_path2_acl {
|
|
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
|
|
u8 perm;
|
|
struct tomoyo_name_union name1;
|
|
struct tomoyo_name_union name2;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_mount_acl is a structure which is used for holding an
|
|
* entry for mount operation.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" which is a "struct tomoyo_acl_info".
|
|
* (2) "dev_name" is the device name.
|
|
* (3) "dir_name" is the mount point.
|
|
* (4) "fs_type" is the filesystem type.
|
|
* (5) "flags" is the mount flags.
|
|
*
|
|
* Directive held by this structure is "allow_mount".
|
|
*/
|
|
struct tomoyo_mount_acl {
|
|
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
|
|
struct tomoyo_name_union dev_name;
|
|
struct tomoyo_name_union dir_name;
|
|
struct tomoyo_name_union fs_type;
|
|
struct tomoyo_number_union flags;
|
|
};
|
|
|
|
#define TOMOYO_MAX_IO_READ_QUEUE 32
|
|
|
|
/*
|
|
* Structure for reading/writing policy via /sys/kernel/security/tomoyo
|
|
* interfaces.
|
|
*/
|
|
struct tomoyo_io_buffer {
|
|
void (*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;
|
|
char __user *read_user_buf;
|
|
int read_user_buf_avail;
|
|
struct {
|
|
struct list_head *domain;
|
|
struct list_head *group;
|
|
struct list_head *acl;
|
|
int avail;
|
|
int step;
|
|
int query_index;
|
|
u16 index;
|
|
u8 bit;
|
|
u8 w_pos;
|
|
bool eof;
|
|
bool print_this_domain_only;
|
|
bool print_execute_only;
|
|
const char *w[TOMOYO_MAX_IO_READ_QUEUE];
|
|
} r;
|
|
/* The position currently writing to. */
|
|
struct tomoyo_domain_info *write_var1;
|
|
/* Buffer for reading. */
|
|
char *read_buf;
|
|
/* 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_readable_file is a structure which is used for holding
|
|
* "allow_read" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" is "struct tomoyo_acl_head".
|
|
* (2) "filename" is a pathname which is allowed to open(O_RDONLY).
|
|
*/
|
|
struct tomoyo_readable_file {
|
|
struct tomoyo_acl_head head;
|
|
const struct tomoyo_path_info *filename;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_no_pattern is a structure which is used for holding
|
|
* "file_pattern" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" is "struct tomoyo_acl_head".
|
|
* (2) "pattern" is a pathname pattern which is used for converting pathnames
|
|
* to pathname patterns during learning mode.
|
|
*/
|
|
struct tomoyo_no_pattern {
|
|
struct tomoyo_acl_head head;
|
|
const struct tomoyo_path_info *pattern;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_no_rewrite is a structure which is used for holding
|
|
* "deny_rewrite" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" is "struct tomoyo_acl_head".
|
|
* (2) "pattern" is a pathname which is by default not permitted to modify
|
|
* already existing content.
|
|
*/
|
|
struct tomoyo_no_rewrite {
|
|
struct tomoyo_acl_head head;
|
|
const struct tomoyo_path_info *pattern;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_transition_control is a structure which is used for holding
|
|
* "initialize_domain"/"no_initialize_domain"/"keep_domain"/"no_keep_domain"
|
|
* entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" is "struct tomoyo_acl_head".
|
|
* (2) "type" is type of this entry.
|
|
* (3) "is_last_name" is a bool which is true if "domainname" is "the last
|
|
* component of a domainname", false otherwise.
|
|
* (4) "domainname" which is "a domainname" or "the last component of a
|
|
* domainname".
|
|
* (5) "program" which is a program's pathname.
|
|
*/
|
|
struct tomoyo_transition_control {
|
|
struct tomoyo_acl_head head;
|
|
u8 type; /* One of values in "enum tomoyo_transition_type". */
|
|
/* True if the domainname is tomoyo_get_last_name(). */
|
|
bool is_last_name;
|
|
const struct tomoyo_path_info *domainname; /* Maybe NULL */
|
|
const struct tomoyo_path_info *program; /* Maybe NULL */
|
|
};
|
|
|
|
/*
|
|
* tomoyo_aggregator is a structure which is used for holding
|
|
* "aggregator" entries.
|
|
* It has following fields.
|
|
*
|
|
* (1) "head" is "struct tomoyo_acl_head".
|
|
* (2) "original_name" which is originally requested name.
|
|
* (3) "aggregated_name" which is name to rewrite.
|
|
*/
|
|
struct tomoyo_aggregator {
|
|
struct tomoyo_acl_head head;
|
|
const struct tomoyo_path_info *original_name;
|
|
const struct tomoyo_path_info *aggregated_name;
|
|
};
|
|
|
|
/*
|
|
* tomoyo_manager 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) "head" is "struct tomoyo_acl_head".
|
|
* (2) "is_domain" is a bool which is true if "manager" is a domainname, false
|
|
* otherwise.
|
|
* (3) "manager" is a domainname or a program's pathname.
|
|
*/
|
|
struct tomoyo_manager {
|
|
struct tomoyo_acl_head head;
|
|
bool is_domain; /* True if manager is a domainname. */
|
|
/* A path to program or a domainname. */
|
|
const struct tomoyo_path_info *manager;
|
|
};
|
|
|
|
struct tomoyo_preference {
|
|
unsigned int learning_max_entry;
|
|
bool enforcing_verbose;
|
|
bool learning_verbose;
|
|
bool permissive_verbose;
|
|
};
|
|
|
|
struct tomoyo_profile {
|
|
const struct tomoyo_path_info *comment;
|
|
struct tomoyo_preference *learning;
|
|
struct tomoyo_preference *permissive;
|
|
struct tomoyo_preference *enforcing;
|
|
struct tomoyo_preference preference;
|
|
u8 default_config;
|
|
u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
|
|
};
|
|
|
|
/********** 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);
|
|
int tomoyo_get_mode(const u8 profile, const u8 index);
|
|
void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
|
|
__attribute__ ((format(printf, 2, 3)));
|
|
/* Check whether the domainname is correct. */
|
|
bool tomoyo_correct_domain(const unsigned char *domainname);
|
|
/* Check whether the token is correct. */
|
|
bool tomoyo_correct_path(const char *filename);
|
|
bool tomoyo_correct_word(const char *string);
|
|
/* Check whether the token can be a domainname. */
|
|
bool tomoyo_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_group *group);
|
|
/* 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_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_parse_number_union(char *data, struct tomoyo_number_union *num);
|
|
/* 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);
|
|
/* Fill "struct tomoyo_request_info". */
|
|
int tomoyo_init_request_info(struct tomoyo_request_info *r,
|
|
struct tomoyo_domain_info *domain,
|
|
const u8 index);
|
|
/* Check permission for mount operation. */
|
|
int tomoyo_mount_permission(char *dev_name, struct path *path, char *type,
|
|
unsigned long flags, void *data_page);
|
|
/* Create "aggregator" entry in exception policy. */
|
|
int tomoyo_write_aggregator(char *data, const bool is_delete);
|
|
int tomoyo_write_transition_control(char *data, const bool is_delete,
|
|
const u8 type);
|
|
/*
|
|
* 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(char *data, struct tomoyo_domain_info *domain,
|
|
const bool is_delete);
|
|
/* Create "allow_read" entry in exception policy. */
|
|
int tomoyo_write_globally_readable(char *data, const bool is_delete);
|
|
/* Create "allow_mount" entry in domain policy. */
|
|
int tomoyo_write_mount(char *data, struct tomoyo_domain_info *domain,
|
|
const bool is_delete);
|
|
/* Create "deny_rewrite" entry in exception policy. */
|
|
int tomoyo_write_no_rewrite(char *data, const bool is_delete);
|
|
/* Create "file_pattern" entry in exception policy. */
|
|
int tomoyo_write_pattern(char *data, const bool is_delete);
|
|
/* Create "path_group"/"number_group" entry in exception policy. */
|
|
int tomoyo_write_group(char *data, const bool is_delete, const u8 type);
|
|
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
|
|
__attribute__ ((format(printf, 2, 3)));
|
|
/* 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_assign_domain(const char *domainname,
|
|
const u8 profile);
|
|
struct tomoyo_profile *tomoyo_profile(const u8 profile);
|
|
/*
|
|
* Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group".
|
|
*/
|
|
struct tomoyo_group *tomoyo_get_group(const char *group_name, const u8 type);
|
|
|
|
/* 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. */
|
|
char *tomoyo_encode(const char *str);
|
|
|
|
/*
|
|
* Returns realpath(3) of the given pathname except that
|
|
* ignores chroot'ed root and does not follow the final symlink.
|
|
*/
|
|
char *tomoyo_realpath_nofollow(const char *pathname);
|
|
/*
|
|
* Returns realpath(3) of the given pathname except that
|
|
* ignores chroot'ed root and the pathname is already solved.
|
|
*/
|
|
char *tomoyo_realpath_from_path(struct path *path);
|
|
/* Get patterned pathname. */
|
|
const char *tomoyo_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. */
|
|
void 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_path_permission(struct tomoyo_request_info *r, u8 operation,
|
|
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_mkdev_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,
|
|
struct path *path2);
|
|
int tomoyo_find_next_domain(struct linux_binprm *bprm);
|
|
|
|
void tomoyo_print_ulong(char *buffer, const int buffer_len,
|
|
const unsigned long value, const u8 type);
|
|
|
|
/* Drop refcount on tomoyo_name_union. */
|
|
void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
|
|
|
|
/* Run garbage collector. */
|
|
void tomoyo_run_gc(void);
|
|
|
|
void tomoyo_memory_free(void *ptr);
|
|
|
|
int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
|
|
bool is_delete, struct tomoyo_domain_info *domain,
|
|
bool (*check_duplicate) (const struct tomoyo_acl_info
|
|
*,
|
|
const struct tomoyo_acl_info
|
|
*),
|
|
bool (*merge_duplicate) (struct tomoyo_acl_info *,
|
|
struct tomoyo_acl_info *,
|
|
const bool));
|
|
int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
|
|
bool is_delete, struct list_head *list,
|
|
bool (*check_duplicate) (const struct tomoyo_acl_head
|
|
*,
|
|
const struct tomoyo_acl_head
|
|
*));
|
|
void tomoyo_check_acl(struct tomoyo_request_info *r,
|
|
bool (*check_entry) (const struct tomoyo_request_info *,
|
|
const struct tomoyo_acl_info *));
|
|
|
|
/********** External variable definitions. **********/
|
|
|
|
/* Lock for GC. */
|
|
extern struct srcu_struct tomoyo_ss;
|
|
|
|
/* The list for "struct tomoyo_domain_info". */
|
|
extern struct list_head tomoyo_domain_list;
|
|
|
|
extern struct list_head tomoyo_policy_list[TOMOYO_MAX_POLICY];
|
|
extern struct list_head tomoyo_group_list[TOMOYO_MAX_GROUP];
|
|
extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
|
|
|
|
/* Lock for protecting policy. */
|
|
extern struct mutex tomoyo_policy_lock;
|
|
|
|
/* Has /sbin/init started? */
|
|
extern bool tomoyo_policy_loaded;
|
|
|
|
/* The kernel's domain. */
|
|
extern struct tomoyo_domain_info tomoyo_kernel_domain;
|
|
|
|
extern const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
|
|
extern const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION];
|
|
extern const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION];
|
|
extern const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION];
|
|
|
|
extern unsigned int tomoyo_quota_for_query;
|
|
extern unsigned int tomoyo_query_memory_size;
|
|
|
|
/********** Inlined functions. **********/
|
|
|
|
static inline int tomoyo_read_lock(void)
|
|
{
|
|
return srcu_read_lock(&tomoyo_ss);
|
|
}
|
|
|
|
static inline void tomoyo_read_unlock(int idx)
|
|
{
|
|
srcu_read_unlock(&tomoyo_ss, idx);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_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_valid(const unsigned char c)
|
|
{
|
|
return c > ' ' && c < 127;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_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_invalid(const unsigned char c)
|
|
{
|
|
return c && (c <= ' ' || c >= 127);
|
|
}
|
|
|
|
static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
|
|
{
|
|
if (name) {
|
|
struct tomoyo_name *ptr =
|
|
container_of(name, typeof(*ptr), entry);
|
|
atomic_dec(&ptr->users);
|
|
}
|
|
}
|
|
|
|
static inline void tomoyo_put_group(struct tomoyo_group *group)
|
|
{
|
|
if (group)
|
|
atomic_dec(&group->users);
|
|
}
|
|
|
|
static inline struct tomoyo_domain_info *tomoyo_domain(void)
|
|
{
|
|
return current_cred()->security;
|
|
}
|
|
|
|
static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
|
|
*task)
|
|
{
|
|
return task_cred_xxx(task, security);
|
|
}
|
|
|
|
static inline bool tomoyo_same_acl_head(const struct tomoyo_acl_info *p1,
|
|
const struct tomoyo_acl_info *p2)
|
|
{
|
|
return p1->type == p2->type;
|
|
}
|
|
|
|
static inline bool tomoyo_same_name_union
|
|
(const struct tomoyo_name_union *p1, const struct tomoyo_name_union *p2)
|
|
{
|
|
return p1->filename == p2->filename && p1->group == p2->group &&
|
|
p1->is_group == p2->is_group;
|
|
}
|
|
|
|
static inline bool tomoyo_same_number_union
|
|
(const struct tomoyo_number_union *p1, const struct tomoyo_number_union *p2)
|
|
{
|
|
return p1->values[0] == p2->values[0] && p1->values[1] == p2->values[1]
|
|
&& p1->group == p2->group && p1->min_type == p2->min_type &&
|
|
p1->max_type == p2->max_type && p1->is_group == p2->is_group;
|
|
}
|
|
|
|
/**
|
|
* list_for_each_cookie - iterate over a list with cookie.
|
|
* @pos: the &struct list_head to use as a loop cursor.
|
|
* @head: the head for your list.
|
|
*/
|
|
#define list_for_each_cookie(pos, head) \
|
|
if (!pos) \
|
|
pos = srcu_dereference((head)->next, &tomoyo_ss); \
|
|
for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
|
|
|
|
#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
|