/*
* 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
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*/
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;
/*
* @ test
* @ bug 8209632
* @ summary Test EdDSAParameterSpec .
* @ library / test / lib
* @ build jdk . test . lib . Convert
* @ run main EdDSAParamSpec
*/
public class EdDSAParamSpec {
private static final String EDDSA = "EdDSA" ;
private static final String ED25519 = "Ed25519" ;
private static final String ED448 = "Ed448" ;
private static final String PROVIDER = "SunEC" ;
private static final byte [] MSG = "TEST" .getBytes();
private static final SecureRandom RND = new SecureRandom(new byte []{0 x1});
public static void main(String[] args) throws Exception {
testParam(PROVIDER, EDDSA);
testParam(PROVIDER, ED25519);
testParam(PROVIDER, ED448);
}
/**
* Test Signature .
*/
private static void testParam(String provider, String name)
throws Exception {
KeyPair kp = genKeyPair(provider, name);
Signature sig = Signature.getInstance(name, provider);
EdDSAParameterSpec initParam
= new EdDSAParameterSpec(true , "testContext" .getBytes());
sig.setParameter(initParam);
byte [] origSign = sign(sig, kp.getPrivate(), MSG);
for (boolean preHash : new boolean []{true , false }) {
System.out.printf("Testing signature for name: %s,"
+ " algorithm spec: (prehash:%s)%n" , name, preHash);
verifyPublic(sig, kp.getPublic(), MSG,
new EdDSAParameterSpec(preHash), initParam, origSign);
// Test Case with Context size combined.
// As per rfc8032, value of context is maximum of 255 octet
byte [] maxCtx = new byte [255 ];
RND.nextBytes(maxCtx);
for (byte [] context : new byte [][]{"others" .getBytes(), maxCtx}) {
System.out.printf("Testing signature for name: %s,"
+ " algorithm spec: (prehash:%s, context:%s)%n" ,
name, preHash, HexFormat.of().withUpperCase().formatHex(context));
EdDSAParameterSpec params
= new EdDSAParameterSpec(preHash, context);
verifyPublic(sig, kp.getPublic(), MSG, params, initParam,
origSign);
}
}
System.out.println("Passed." );
}
private static KeyPair genKeyPair(String provider, String name)
throws Exception {
KeyPairGenerator kpg = KeyPairGenerator.getInstance(name, provider);
return kpg.generateKeyPair();
}
private static byte [] sign(Signature sig, PrivateKey priKey, byte [] msg)
throws Exception {
sig.initSign(priKey);
sig.update(msg);
return sig.sign();
}
private static boolean verify(Signature sig, PublicKey pubKey, byte [] msg,
byte [] sign) throws Exception {
sig.initVerify(pubKey);
sig.update(msg);
return sig.verify(sign);
}
private static void verifyPublic(Signature sig, PublicKey pubKey,
byte [] msg, EdDSAParameterSpec params, EdDSAParameterSpec initParam,
byte [] origSign) throws Exception {
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))) {
throw new 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" );
}
}
}
private static boolean equals(Object actual, Object expected) {
if (actual == expected) {
return true ;
}
if (actual == null || expected == null ) {
return false ;
}
boolean equals = actual.equals(expected);
if (!equals) {
throw new RuntimeException(String.format("Actual: %s, Expected: %s" ,
actual, expected));
}
return equals;
}
private static boolean equals(byte [] actual, byte [] expected) {
if (actual == expected) {
return true ;
}
if (actual == null || expected == null ) {
return false ;
}
boolean equals = Arrays.equals(actual, expected);
if (!equals) {
throw new RuntimeException(String.format("Actual array: %s, "
+ "Expected array:%s" , HexFormat.of().withUpperCase().formatHex(actual),
HexFormat.of().withUpperCase().formatHex(expected)));
}
return equals;
}
}
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