CT_DerEncodeNamedCurve

Synopsis

CK_RV CT_DerEncodeNamedCurve(
CK_BYTE_PTR buf,
CK_SIZE_PTR len,
const char *name); 

Description

Helper function to provide the DER encoding of a supported named curve. This function is typically used to populate the CKA_EC_PARAMS attribute of the template used during EC key pair generation.

Supported curve names are:

Name	OID
c2tnb191v1	{ iso(1) member-body(2) US(840) x9-62(10045) curves(3) characteristicTwo(0) c2tnb191v1(5) }
P-192 (also known as  “prime192v1” “secp192r1”)	{ iso(1) member-body(2) US(840) x9-62(10045) curves(3) prime(1) prime192v1(1) }
P-224 (also known as “secp224r1”)	{ iso(1) identified-organization(3) Certicom(132) certicom_ellipticCurve(0) secp224r1(33) }
P-256 (also known as  (“prime256v1 ” “secp256r1”)	{ iso(1) member-body(2) US(840) x9-62(10045) curves(3) prime(1) prime256v1(7) }
P-384 (also known as  “secp384r1”)	{ iso(1) identified-organization(3) Certicom(132) certicom_ellipticCurve(0) secp384r1(34) }
P-521 (also known as “secp521r1”)	{ iso(1) identified-organization(3) Certicom(132) certicom_ellipticCurve(0) secp521r1(35) }
c2tnb191v1e (Non FIPS curve)	{ iso(1) member-body(2) US(840) x9-62(10045) curves(3) characteristicTwo(0) c2tnb191v1e (15) }

Parameters

buf	Buffer to hold the DER encoding
len	*len is total number of bytes referenced by buf
name	String name of the curve to get the encoding for

On successful return

buf — contains a string.

Example: “hh:mm:ss DD/MM/YYYY“ *len Number of bytes copied to buf 

To determine the encoding length, pass in NULL for buf and check the resulting value of *len.