This structure contains the extension information for a certificate.
Object identifier (OID) that specifies the structure of the extension data contained in the Value member. For specifics on extension OIDs and their related structures, see X.509 Certificate Extension Structures.
If TRUE, any limitations specified by the extension in the Value member of this structure are imperative. If FALSE, limitations set by this extension can be ignored.
A BLOB (Cryptography) structure that contains the encoded extension data. The cbData member of Value indicates the length in bytes of the pbData member. The pbData byte string is the encoded extension.