selinux-policy/refpolicy/policy/modules/kernel/selinux.if

## <summary>
##	Policy for kernel security interface, in particular, selinuxfs.
## </summary>
## <required val="true">
##	Contains the policy for the kernel SELinux security interface.
## </required>

########################################
## <summary>
##	Gets the caller the mountpoint of the selinuxfs filesystem.
## </summary>
## <param name="domain">
##	The process type requesting the selinuxfs mountpoint.
## </param>
#
interface(`selinux_get_fs_mount',`
	# read /proc/filesystems to see if selinuxfs is supported
	# then read /proc/self/mount to see where selinuxfs is mounted
	kernel_read_system_state($1)
')

########################################
## <summary>
##	Do not audit attempts to get the
##	attributes of the selinuxfs directory.
## </summary>
## <param name="domain">
##	Domain to not audit.
## </param>
#
interface(`selinux_dontaudit_getattr_dir',`
	gen_require(`
		type security_t;
		class dir getattr;
	')

	dontaudit $1 security_t:dir getattr;
')

########################################
## <summary>
##	Do not audit attempts to search selinuxfs.
## </summary>
## <param name="domain">
##	Domain to not audit.
## </param>
#
interface(`selinux_dontaudit_search_fs',`
	gen_require(`
		type security_t;
		class dir search;
	')

	dontaudit $1 security_t:dir search;
')

########################################
## <summary>
##	Allows the caller to get the mode of policy enforcement
##	(enforcing or permissive mode).
## </summary>
## <param name="domain">
##	The process type to allow to get the enforcing mode.
## </param>
#
interface(`selinux_get_enforce_mode',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read };
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read };
')

########################################
## <summary>
##	Allow caller to set the mode of policy enforcement
##	(enforcing or permissive mode).
## </summary>
## <desc>
##	<p>
##	Allow caller to set the mode of policy enforcement
##	(enforcing or permissive mode).
##	</p>
##	<p>
##	Since this is a security event, this action is
##	always audited.
##	</p>
## </desc>
## <param name="domain">
##	The process type to allow to set the enforcement mode.
## </param>
#
interface(`selinux_set_enforce_mode',`
	gen_require(`
		type security_t;
		attribute can_setenforce;
		class dir { read search getattr };
		class file { getattr read write };
		class security setenforce;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security setenforce;
	auditallow $1 security_t:security setenforce;
	typeattribute $1 can_setenforce;
')

########################################
## <summary>
##	Allow caller to load the policy into the kernel.
## </summary>
## <param name="domain">
##	The process type that will load the policy.
## </param>
#
interface(`selinux_load_policy',`
	gen_require(`
		type security_t;
		attribute can_load_policy;
		class dir { read search getattr };
		class file { getattr read write };
		class security load_policy;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security load_policy;
	auditallow $1 security_t:security load_policy;
	typeattribute $1 can_load_policy;
')

########################################
## <summary>
##	Allow caller to set the state of Booleans to
##	enable or disable conditional portions of the policy.
## </summary>
## <desc>
##	<p>
##	Allow caller to set the state of Booleans to
##	enable or disable conditional portions of the policy.
##	</p>
##	<p>
##	Since this is a security event, this action is
##	always audited.
##	</p>
## </desc>
## <param name="domain">
##	The process type allowed to set the Boolean.
## </param>
## <param name="booltype" optional="true">
##	The type of Booleans the caller is allowed to set.
## </param>
#
interface(`selinux_set_boolean',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read write };
		class security setbool;
	')

	ifelse(`$2',`',`
		allow $1 security_t:dir { getattr search read };
		allow $1 security_t:file { getattr read write };
	',`
		allow $1 $2:dir { getattr search read };
		allow $1 $2:file { getattr read write };
	')

	allow $1 security_t:dir search;
	allow $1 security_t:security setbool;
	auditallow $1 security_t:security setbool;
')

########################################
## <summary>
##	Allow caller to set SELinux access vector cache parameters.
## </summary>
## <desc>
##	<p>
##	Allow caller to set SELinux access vector cache parameters.
##	The allows the domain to set performance related parameters
##	of the AVC, such as cache threshold.
##	</p>
##	<p>
##	Since this is a security event, this action is
##	always audited.
##	</p>
## </desc>
## <param name="domain">
##	The process type to allow to set security parameters.
## </param>
#
interface(`selinux_set_parameters',`
	gen_require(`
		type security_t;
		attribute can_setsecparam;
		class dir { read search getattr };
		class file { getattr read write };
		class security setsecparam;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security setsecparam;
	auditallow $1 security_t:security setsecparam;
	typeattribute $1 can_setsecparam;
')

########################################
## <summary>
##	Allows caller to validate security contexts.
## </summary>
## <param name="domain">
##	The process type permitted to validate contexts.
## </param>
#
interface(`selinux_validate_context',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read write };
		class security check_context;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security check_context;
')

########################################
## <summary>
##	Allows caller to compute an access vector.
## </summary>
## <param name="domain">
##	The process type allowed to compute an access vector.
## </param>
#
interface(`selinux_compute_access_vector',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read write };
		class security compute_av;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security compute_av;
')

########################################
## <summary>
##	Calculate the default type for object creation.
## </summary>
## <param name="domain">
##	Domain allowed access.
## </param>
#
interface(`selinux_compute_create_context',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read write };
		class security compute_create;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security compute_create;
')

########################################
## <summary>
##	Calculate the context for relabeling objects.
## </summary>
## <desc>
##	<p>
##	Calculate the context for relabeling objects.
##	This is determined by using the type_change
##	rules in the policy, and is generally used
##	for determining the context for relabeling
##	a terminal when a user logs in.
##	</p>
## </desc>
## <param name="domain">
##	Domain allowed access.
## </param>
#
interface(`selinux_compute_relabel_context',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read write };
		class security compute_relabel;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security compute_relabel;
')

########################################
## <summary>
##	Allows caller to compute possible contexts for a user.
## </summary>
## <param name="domain">
##	The process type allowed to compute user contexts.
## </param>
#
interface(`selinux_compute_user_contexts',`
	gen_require(`
		type security_t;
		class dir { read search getattr };
		class file { getattr read write };
		class security compute_user;
	')

	allow $1 security_t:dir { read search getattr };
	allow $1 security_t:file { getattr read write };
	allow $1 security_t:security compute_user;
')

########################################
## <summary>
##	Unconfined access to the SELinux kernel security server.
## </summary>
## <param name="domain">
##	Domain allowed access.
## </param>
#
interface(`selinux_unconfined',`
	gen_require(`
		attribute can_load_policy, can_setenforce, can_setsecparam;
		type security_t;
		class dir { getattr search read };
		class file { getattr read write };
		class security { load_policy setenforce setbool };
	')

	# Access the security API.
	allow $1 security_t:security *;
	auditallow $1 security_t:security { load_policy setenforce setbool };

	# use SELinuxfs
	allow $1 security_t:dir { getattr search read };
	allow $1 security_t:file { getattr read write };

	typeattribute $1 can_load_policy, can_setenforce, can_setsecparam;
')