public SecretKey createSignatureKey(byte[] keyBytes) {
        return new SecretKeySpec(keyBytes, SIGNATURE_KEY_GENERATION_ALGORITHM_NAME);
    }
Creates a new key suitable for signature verification using the provided
raw key bytes. The algorithm used to generate this key is dictated by
SIGNATURE_KEY_GENERATION_ALGORITHM_NAME and must match the algorithm
used by sign().

@param keyBytes
    The raw bytes from which the signature verification key should be
    generated.

@return
    A new key suitable for signature verification, generated from the
    given bytes.
extensions/guacamole-auth-json/src/main/java/org/apache/guacamole/auth/json/CryptoService.java