@Override
    protected void engineInitVerify(PublicKey publicKey) throws InvalidKeyException {
        this.publicKey = (OpenSslSlhDsaPublicKey) publicKey;
        this.privateKey = null;
        buffer.reset();
    }
Buffer to hold value to be signed or verified.
common/src/main/java/org/conscrypt/OpenSslSignatureSlhDsa.java