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openSUSE:Factory
java-11-openjdk
TestECDSA.java
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File TestECDSA.java of Package java-11-openjdk
/* TestECDSA -- Ensure ECDSA signatures are working. Copyright (C) 2016 Red Hat, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.math.BigInteger; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.Signature; /** * @test */ public class TestECDSA { public static void main(String[] args) throws Exception { KeyPairGenerator keyGen = KeyPairGenerator.getInstance("EC"); KeyPair key = keyGen.generateKeyPair(); byte[] data = "This is a string to sign".getBytes("UTF-8"); Signature dsa = Signature.getInstance("NONEwithECDSA"); dsa.initSign(key.getPrivate()); dsa.update(data); byte[] sig = dsa.sign(); System.out.println("Signature: " + new BigInteger(1, sig).toString(16)); Signature dsaCheck = Signature.getInstance("NONEwithECDSA"); dsaCheck.initVerify(key.getPublic()); dsaCheck.update(data); boolean success = dsaCheck.verify(sig); if (!success) { throw new RuntimeException("Test failed. Signature verification error"); } System.out.println("Test passed."); } }
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