![]() | Cryptographic Token Interface Standard |
PKCS#11 |
Sections | |
Clock Objects | |
Monotonic Counter Objects |
Hardware feature objects (CKO_HW_FEATURE) represent features of the device. They provide an easily expandable method for introducing new value-based features to the cryptoki interface. The following figure illustrates the hierarchy of hardware feature objects and some of the attributes they support:
When searching for objects using C_FindObjectsInit and C_FindObjects, hardware feature objects are not returned unless the CKA_CLASS attribute in the template has the value CKO_HW_FEATURE. This protects applications written to previous versions of cryptoki from finding objects that they do not understand.
Table 15, Hardware Feature Common Attributes
Attribute | Data Type | Meaning |
CKA_HW_FEATURE_TYPE | CK_HW_FEATURE | Hardware feature (type) |
Cryptoki Version 2.1 supports the following values for CKA_FEATURE_TYPE : CKH_MONOTONIC_COUNTER, and CKH_CLOCK.