/* * 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.
*/
KeyPair kp = genKeyPair(name);
Signature sig = Signature.getInstance(name, PROVIDER); // Set initial paramter to generate a signature
EdDSAParameterSpec initParam
= new EdDSAParameterSpec(true, "testContext".getBytes());
sig.setParameter(initParam); byte[] computedSig = sign(sig, kp.getPrivate(), MSG); // Signature should not get verified other than same parameter // which is set through the signature instance. for (boolean preHash : newboolean[]{true, false}) { // Test case with prehash as parameter without context set.
verify(sig, kp.getPublic(), MSG, new EdDSAParameterSpec(preHash),
initParam, computedSig); // Test Case with Context combined of different sizes. // As per rfc8032, value of context is maximum of 255 octet for (byte[] context : newbyte[][]{{}, "other".getBytes(), newbyte[255], newbyte[500]}) {
System.out.printf("Testing signature for name: %s, algorithm "
+ "spec: (prehash:%s, context:%s)%n", name, preHash,
HexFormat.of().withUpperCase().formatHex(context)); try {
verify(sig, kp.getPublic(), MSG, new EdDSAParameterSpec(preHash, context),
initParam, computedSig);
} catch (InvalidParameterException e) { if (context.length <= 255) { thrownew RuntimeException("Should not throw exception "
+ "when context size <= 255 octet: "
+ context.length);
}
}
}
}
}
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