//Build the OCSP response
public byte[] BuildOCSPResp(byte[] cert, byte[] ocspResp)
{
//Generate the VLR structure
DataStructs.VLRHeader vlrHeader = Utils.GenerateVLR(DataStructs.VLR_ID_TYPE.OCSP_RESP_VLR_ID, ocspResp.Length);
byte[] ret = new byte[vlrHeader.VLRLength];
Utils.StructureToByteArray(vlrHeader).CopyTo(ret, 0);
ocspResp.CopyTo(ret, DataStructs.VLR_HEADER_LEN);
return(ret);
}
//Check whther BK exists in the signed message, as a p ert of the S3 message validation
bool DoesBKExist(DataStructs.SIGMA_S3_MESSAGE S3Message, ref byte[] GaGbSig)
{
//Process certificate header in order to get cert length
byte[] header = new byte[DataStructs.VLR_HEADER_LEN];
Array.Copy(S3Message.data, header, header.Length);
object certHeader = new DataStructs.VLRHeader();
Utils.ByteArrayToStructure(header, ref certHeader);
int certLen = ((DataStructs.VLRHeader)certHeader).VLRLength;
//Extract GaGb from the signed message data
Array.Copy(S3Message.data, certLen + DataStructs.VLR_HEADER_LEN, GaGbSig, 0, GaGbSig.Length);
BK = Utils.GetBKValuesFromSignedMessage(GaGbSig);
return(BK != null);
}