set_digest_alg
ret = set_digest_alg(signatureAlgorithm, sig_alg->sig_oid,
ret = set_digest_alg(signatureAlgorithm, sig_oid, "\x05\x00", 2);
ret = set_digest_alg(signatureAlgorithm, sig_oid, "\x05\x00", 2);
ret = set_digest_alg(&spki->algorithm, ASN1_OID_ID_PKCS1_RSAENCRYPTION,