Description

The Discrim key enables the holder to discern certain information concerning the type and discretion of other keys.

Operations

Check Alleged Key Type (OC = KT)

Returns the alleged type of the key.

Reply	R1	AKT_Discrim: Key is a discrim key
Result	RC_OK	Operation completed successfully.

Classify (OC = OC_Discrim_Classify (1))

Returns the category of the passed key.

Request	SK0	The key to be classified.
Reply	R1	Discrim_Class_Void	SK0 is a void key
		Discrim_Class_Number	SK0 is a number key
		Discrim_Class_Resume	SK0 is a resume key.
		Discrim_Class_Memory	SK0 is a page, node, address space, or sense key.
		Discrim_Class_Sched	SK0 is a schedule key.
		Discrim_Class_Other	SK0 is some other type of key.
Result	RC_OK	Operation completed successfully.

Verify Discretion (OC = OC_Discrim_Verify (2))

Determines whether the key in question is capable of leaking information:

Request	SK0	The key to be checked.
Reply	R1	0: Key is some other key.
		1: Key is one of the following, which are discrete: A read-only page key A read-only, no-call segment key A sense key A number key The discrim key The void key
Result	RC_OK	Operation completed successfully.

Compare Keys (OC = OC_Discrim_Compare (3))

Determines whether two keys are identical.

Request	SK0, SK1	The keys to be compared.
Reply	R1	0: Keys are different.
		1: Keys are identical.
Result	RC_OK	Operation completed successfully.