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/**
* @ test
* @ bug 4853305 4865198 4888410 4963723 8146293
* @ summary Verify that the RSA KeyPairGenerator works
* @ library / test / lib
* @ build jdk . test . lib . SigTestUtil
* @ run main TestKeyPairGenerator
* @ author Andreas Sterbenz
* @ key randomness
*/
import java.io.*;
import java.util.*;
import java.math.BigInteger;
import java.security.*;
import java.security.interfaces.*;
import java.security.spec.*;
import jdk.test.lib.SigTestUtil;
import static jdk.test.lib.SigTestUtil.SignatureType;
public class TestKeyPairGenerator {
private static Provider provider;
private static byte [] data;
private static void testSignature(SignatureType type, String mdAlg,
PrivateKey privateKey, PublicKey publicKey) throws
NoSuchAlgorithmException, InvalidKeyException, SignatureException {
System.out.println("Testing against " + mdAlg + "..." );
String sigAlg = SigTestUtil.generateSigAlg(type, mdAlg);
Signature s = Signature.getInstance(sigAlg, provider);
s.initSign(privateKey);
s.update(data);
byte [] sig = s.sign();
s.initVerify(publicKey);
s.update(data);
boolean result = s.verify(sig);
if (result == false ) {
throw new RuntimeException("Verification failed" );
}
}
private static void test(PrivateKey privateKey, PublicKey publicKey) throws Exception {
int testSize = ((RSAPublicKey)publicKey).getModulus().bitLength();
System.out.println("modulus size = " + testSize);
Iterable<String> md_alg_pkcs15 =
SigTestUtil.getDigestAlgorithms(SignatureType.RSA, testSize);
md_alg_pkcs15.forEach(mdAlg -> {
try {
testSignature(SignatureType.RSA, mdAlg, privateKey, publicKey);
} catch (NoSuchAlgorithmException | InvalidKeyException |
SignatureException ex) {
throw new RuntimeException(ex);
}
}
);
}
// regression test for 4865198
private static void testInvalidSignature(KeyPair kp1, KeyPair kp2) throws Exception {
System.out.println("Testing signature with incorrect key..." );
Signature sig = Signature.getInstance("MD5withRSA" , provider);
sig.initSign(kp1.getPrivate());
byte [] data = new byte [100 ];
sig.update(data);
byte [] signature = sig.sign();
sig.initVerify(kp1.getPublic());
sig.update(data);
if (sig.verify(signature) == false ) {
throw new Exception("verification failed" );
}
sig.initVerify(kp2.getPublic());
sig.update(data);
// verify needs to return false and not throw an Exception
try {
if (sig.verify(signature)) {
throw new Exception("verification unexpectedly succeeded" );
}
} catch (SignatureException se) {
// Yet another kind of failure, OK.
}
}
public static void main(String[] args) throws Exception {
long start = System.currentTimeMillis();
provider = Security.getProvider("SunRsaSign" );
data = new byte [2048 ];
// keypair generation is very slow, test only a few short keys
int [] keyLengths = {512 , 512 , 1024 };
BigInteger[] pubExps = {null , BigInteger.valueOf(3 ), null };
KeyPair[] keyPairs = new KeyPair[3 ];
new Random().nextBytes(data);
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA" , provider);
for (int i = 0 ; i < keyLengths.length; i++) {
int len = keyLengths[i];
BigInteger exp = pubExps[i];
System.out.println("Generating " + len + " bit keypair..." );
if (exp == null ) {
kpg.initialize(len);
} else {
kpg.initialize(new RSAKeyGenParameterSpec(len, exp));
}
KeyPair kp = kpg.generateKeyPair();
keyPairs[i] = kp;
RSAPublicKey publicKey = (RSAPublicKey)kp.getPublic();
System.out.println(publicKey);
RSAPrivateCrtKey privateKey = (RSAPrivateCrtKey)kp.getPrivate();
if (publicKey.getModulus().equals(privateKey.getModulus()) == false ) {
throw new Exception("Moduli do not match" );
}
if (publicKey.getPublicExponent().equals(privateKey.getPublicExponent()) == false ) {
throw new Exception("Exponents do not match" );
}
int keyLen = publicKey.getModulus().bitLength();
if ((keyLen > len) || (keyLen < len - 1 )) {
throw new Exception("Incorrect key length: " + keyLen);
}
if (exp != null ) {
if (exp.equals(publicKey.getPublicExponent()) == false ) {
throw new Exception("Incorrect exponent" );
}
}
test(privateKey, publicKey);
}
testInvalidSignature(keyPairs[0 ], keyPairs[1 ]);
testInvalidSignature(keyPairs[0 ], keyPairs[2 ]);
testInvalidSignature(keyPairs[2 ], keyPairs[0 ]);
long stop = System.currentTimeMillis();
System.out.println("All tests passed (" + (stop - start) + " ms)." );
}
}
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