unsigned char sha1_hash_binary[SHA_DIGEST_LENGTH];
    char sha256_hash_ascii[SHA256_DIGEST_LENGTH * 2 + 1];
    unsigned char sha256_hash_binary[SHA256_DIGEST_LENGTH];
    const char *shachars="0123456789ABCDEF";
    int nid, pknid, bits, num_of_exts, len;
    uint32_t xflags;
    unsigned char *bstring;
    STACK_OF(GENERAL_NAME) *san;

    sha1_hash_ascii[SHA_DIGEST_LENGTH * 2] = '\0';
    sha256_hash_ascii[SHA256_DIGEST_LENGTH * 2] = '\0';

    certStr[0] = 0;
    if ((bio = BIO_new(BIO_s_mem())) == NULL) {
	subject[0] = 0;

	    ASN1_OBJECT *obj = X509_EXTENSION_get_object(ex);
	    unsigned nid2 = OBJ_obj2nid(obj);
	    Tcl_ListObjAppendElement(interp, extsPtr, Tcl_NewStringObj(OBJ_nid2ln(nid2), -1));
	}
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("extensions", -1));
	Tcl_ListObjAppendElement(interp, certPtr, extsPtr);
    }

    /* Subject Alternative Name (SAN) extension. Additional host names for a single SSL certificate. */
    san = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
    if (san) {
	Tcl_Obj *namesPtr = Tcl_NewListObj(0, NULL);

	for (int i=0; i < sk_GENERAL_NAME_num(san); i++)         {
	    const GENERAL_NAME *name = sk_GENERAL_NAME_value(san, i);
	    size_t len2;

	    if (name) {
		if (name->type == GEN_DNS) {
		    char *dns_name;
		    if ((len2 = ASN1_STRING_to_UTF8(&dns_name, name->d.dNSName)) > 0) {
			Tcl_ListObjAppendElement(interp, namesPtr, Tcl_NewStringObj(dns_name, (int)len2));
			OPENSSL_free (dns_name);
		    }
		} else if (name->type == GEN_IPADD) {
		    /* name->d.iPAddress */
		}
	    }
	}
	sk_GENERAL_NAME_pop_free(san, GENERAL_NAME_free);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subject_alt_names", -1));
	Tcl_ListObjAppendElement(interp, certPtr, namesPtr);
    }

    return certPtr;
}