/*
* 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.InvalidKeyException;
import java.security.InvalidParameterException;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.interfaces.EdECPrivateKey;
import java.security.interfaces.EdECPublicKey;
import java.security.spec.EdDSAParameterSpec;
import java.util.Arrays;
import java.util.HexFormat;
/*
* @ test
* @ bug 8209632
* @ summary Negative cases for EDDSA .
* @ library / test / lib
* @ run main EdDSANegativeTest
*/
public class EdDSANegativeTest {
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 String OTHER = "other" ;
private static final byte [] MSG = "TEST" .getBytes();
public static void main(String[] args) throws Exception {
byName();
byParam();
byInvalidKey();
byInvalidKeyType();
}
private static void byName() throws Exception {
for (String name : new String[]{null , "" , "EDDSA" , "eddsa" , "EDdsa" ,
EDDSA, ED25519, "ed25519" , "ED25519" , ED448, "eD448" , "ED448" ,
"ed448" , OTHER}) {
try {
KeyPair kp = genKeyPair(name);
KeyFactory kf = KeyFactory.getInstance(name, PROVIDER);
EdECPrivateKey edPri
= (EdECPrivateKey) kf.translateKey(kp.getPrivate());
EdECPublicKey edPub
= (EdECPublicKey) kf.translateKey(kp.getPublic());
Signature sig = Signature.getInstance(name, PROVIDER);
byte [] computedSig = sign(sig, edPri, MSG);
if (!verify(sig, edPub, MSG, computedSig)) {
throw new RuntimeException("Signature verification failed" );
}
if (name == null || "" .equals(name)) {
throw new RuntimeException(
"Should not reach here for algo: " + name);
}
System.out.println("Passed: byName: " + name);
} catch (NullPointerException e) {
if (name != null ) {
throw new RuntimeException(
"Unknown issue with algo name: " + name, e);
}
} catch (NoSuchAlgorithmException e) {
if (!("" .equals(name) || OTHER.equals(name))) {
throw new RuntimeException(
"Unknown issue with algo name: " + name, e);
}
}
}
}
private static void byParam() throws Exception {
testParam(EDDSA);
testParam(ED25519);
testParam(ED448);
}
private static void byInvalidKey() throws Exception {
testInvalidKey(EDDSA);
testInvalidKey(ED25519);
testInvalidKey(ED448);
}
private static void byInvalidKeyType() throws Exception {
testInvalidKeyType(EDDSA);
testInvalidKeyType(ED25519);
testInvalidKeyType(ED448);
}
/**
* Test Signature .
*/
private static void testParam(String name) throws Exception {
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 : new boolean []{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 : new byte [][]{{}, "other" .getBytes(),
new byte [255 ], new byte [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 ) {
throw new RuntimeException("Should not throw exception "
+ "when context size <= 255 octet: "
+ context.length);
}
}
}
}
}
private static void testInvalidKey(String name) throws Exception {
KeyPair kp = genKeyPair(name);
KeyPair kp1 = genKeyPair(name);
Signature sig = Signature.getInstance(name, PROVIDER);
byte [] computedSig = sign(sig, kp.getPrivate(), MSG);
if (verify(sig, kp1.getPublic(), MSG, computedSig)) {
throw new RuntimeException("Signature verification failed "
+ "for unpaired key." );
}
System.out.println("Passed: testInvalidKey: " + name);
}
private static void testInvalidKeyType(String name) throws Exception {
KeyFactory kf = KeyFactory.getInstance(name, PROVIDER);
try {
kf.translateKey(new InvalidPrivateKey());
} catch (InvalidKeyException e) {
// Expected exception and not to be handled
}
try {
kf.translateKey(new InvalidPublicKey());
} catch (InvalidKeyException e) {
// Expected exception and not to be handled
}
System.out.println("Passed: testInvalidKeyType: " + name);
}
private static KeyPair genKeyPair(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 verify(Signature sig, PublicKey pubKey, byte [] msg,
EdDSAParameterSpec params, EdDSAParameterSpec initParam,
byte [] computedSig) throws Exception {
sig.setParameter(params);
if (verify(sig, pubKey, msg, computedSig)) {
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 with other parameters
// set through 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;
}
private static class InvalidPrivateKey implements PrivateKey {
@Override
public String getAlgorithm() {
return "test" ;
}
@Override
public String getFormat() {
return "test" ;
}
@Override
public byte [] getEncoded() {
return "test" .getBytes();
}
}
private static class InvalidPublicKey implements PublicKey {
@Override
public String getAlgorithm() {
return "test" ;
}
@Override
public String getFormat() {
return "test" ;
}
@Override
public byte [] getEncoded() {
return "test" .getBytes();
}
}
}
Messung V0.5 in Prozent C=89 H=95 G=91
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-10)
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