85 lines
3.0 KiB
Java
85 lines
3.0 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.Provider;
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import java.security.Signature;
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public class PSSUtil {
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/**
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* ALGORITHM name, fixed as RSA for PKCS11
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*/
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private static final String KEYALG = "RSA";
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private static final String SIGALG = "RSASSA-PSS";
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public static enum AlgoSupport {
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NO, MAYBE, YES
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};
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public static boolean isSignatureSupported(Provider p) {
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try {
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Signature.getInstance(SIGALG, p);
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return true;
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} catch (NoSuchAlgorithmException e) {
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System.out.println("Skip testing " + SIGALG +
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" due to no support");
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return false;
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}
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}
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public static AlgoSupport isHashSupported(Provider p, String... hashAlgs) {
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AlgoSupport status = AlgoSupport.YES;
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for (String h : hashAlgs) {
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String sigAlg = (h.startsWith("SHA3-") ?
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h : h.replace("-", "")) + "with" + SIGALG;
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try {
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Signature.getInstance(sigAlg, p);
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// Yes, proceed to check next hash algorithm
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continue;
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} catch (NoSuchAlgorithmException e) {
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// continue trying other checks
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}
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try {
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MessageDigest.getInstance(h, p);
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status = AlgoSupport.MAYBE;
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} catch (NoSuchAlgorithmException e) {
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// if not supported as a standalone digest algo, chance of it
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// being supported by PSS is very very low
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return AlgoSupport.NO;
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}
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}
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return status;
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}
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public static KeyPair generateKeys(Provider p, int size)
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throws NoSuchAlgorithmException {
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KeyPairGenerator kpg = KeyPairGenerator.getInstance(KEYALG, p);
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kpg.initialize(size);
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return kpg.generateKeyPair();
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}
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}
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