/* * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions.
*/ import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.PrivateKey; import java.security.PublicKey; import java.security.SecureRandom; import java.security.Signature; import java.security.spec.EdDSAParameterSpec; import java.util.Arrays; import java.util.HexFormat;
sig.setParameter(params); if (verify(sig, pubKey, msg, origSign)) { byte[] context = params.getContext().isPresent()
? params.getContext().get() : null; byte[] initContext = initParam.getContext().isPresent()
? initParam.getContext().get() : null; boolean preHash = params.isPrehash(); boolean initPreHash = initParam.isPrehash(); // The signature should not get verified other than same parameter // which is set through the signature instance. if (!(equals(context, initContext) && equals(preHash, initPreHash))) { thrownew RuntimeException(String.format("Signature verification"
+ " success with different param context(actual:%s, "
+ "expected:%s), Prehash(actual:%s, expected:%s)",
HexFormat.of().withUpperCase().formatHex(context),
HexFormat.of().withUpperCase().formatHex(initContext),
preHash, initPreHash));
} else {
System.out.println("Atleast a case matched");
}
}
}
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