KMF_keyCertSign
if ((keyusage.KeyUsageBits & KMF_keyCertSign)) {
if (keyusage.KeyUsageBits & KMF_keyCertSign) {
if (keyUsage.KeyUsageBits & KMF_keyCertSign)
if (bitfield & KMF_keyCertSign)
return (KMF_keyCertSign);