Chapter 3 Key Info Types 269
KI_ECPublicComponent
KI_ECPublicComponent
Purpose:
This KI allows you to specify the public key component of an EC public key. Unlike
KI_ECPublic, it does not specify the underlying EC parameters and it is not to be used
with any algorithms. It provides a way to extract the EC public key.
Type of information this allows you to use:
an elliptic curve public key without its curve parameters.
Format of info supplied to B_SetKeyInfo:
pointer to an ITEM structure that contains the public key component of an EC public
key.
Format of info returned by B_GetKeyInfo:
pointer to an ITEM structure that contains the address and length of the public key
component of an EC public key.
Restrictions:
Key objects built with this KI are not compatible with any Crypto-C AI. This KI is
supplied only as a convenience to extract the EC public component.
Can get this info type if key object already has:
KI_ECPublicComponent, KI_ECPublicComponentBER,
KI_ECPublic, or KI_ECPublicBER.
