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/*
* Copyright (c) 2016, 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.
*/
/**
* @test
* @bug 8149802
* @summary Ensure that Signature objects are reset after verification errored out.
*/
import java.util.Arrays;
import java.security.*;
public class ResetAfterException {
public static void main(String[] args) throws Exception {
byte[] data = "data to be signed".getBytes();
byte[] shortBuffer = new byte[2];
Provider[] provs = Security.getProviders();
boolean failed = false;
for (Provider p : provs) {
Signature sig;
try {
sig = Signature.getInstance("SHA256withRSA", p);
} catch (NoSuchAlgorithmException nsae) {
// no support, skip
continue;
}
boolean res = true;
System.out.println("Testing Provider: " + p.getName());
KeyPairGenerator keyGen = null;
try {
// It's possible that some provider, e.g. SunMSCAPI,
// doesn't work well with keys from other providers
// so we use the same provider to generate key first
keyGen = KeyPairGenerator.getInstance("RSA", p);
} catch (NoSuchAlgorithmException nsae) {
keyGen = KeyPairGenerator.getInstance("RSA");
}
if (keyGen == null) {
throw new RuntimeException("Error: No support for RSA KeyPairGenerator");
}
keyGen.initialize(1024);
KeyPair keyPair = keyGen.generateKeyPair();
sig.initSign(keyPair.getPrivate());
sig.update(data);
byte[] signature = sig.sign();
// First check signing
try {
sig.update(data);
// sign with short output buffer to cause exception
int len = sig.sign(shortBuffer, 0, shortBuffer.length);
System.out.println("FAIL: Should throw SE with short buffer");
res = false;
} catch (SignatureException e) {
// expected exception; ignore
System.out.println("Expected Ex for short output buffer: " + e);
}
// Signature object should reset after a failed generation
sig.update(data);
byte[] signature2 = sig.sign();
if (!Arrays.equals(signature, signature2)) {
System.out.println("FAIL: Generated different signature");
res = false;
} else {
System.out.println("Generated same signature");
}
// Now, check signature verification
sig.initVerify(keyPair.getPublic());
sig.update(data);
try {
// first verify with valid signature bytes
res = sig.verify(signature);
} catch (SignatureException e) {
System.out.println("FAIL: Valid signature rejected");
e.printStackTrace();
res = false;
}
try {
sig.update(data);
// verify with short signaure to cause exception
if (sig.verify(shortBuffer)) {
System.out.println("FAIL: Invalid signature verified");
res = false;
} else {
System.out.println("Invalid signature rejected");
}
} catch (SignatureException e) {
// expected exception; ignore
System.out.println("Expected Ex for short output buffer: " + e);
}
// Signature object should reset after an a failed verification
sig.update(data);
try {
// verify with valid signature bytes again
res = sig.verify(signature);
if (!res) {
System.out.println("FAIL: Valid signature is rejected");
} else {
System.out.println("Valid signature is accepted");
}
} catch (GeneralSecurityException e) {
System.out.println("FAIL: Valid signature is rejected");
e.printStackTrace();
res = false;
}
failed |= !res;
}
if (failed) {
throw new RuntimeException("One or more test failed");
} else {
System.out.println("Test Passed");
}
}
}
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