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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
* 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.
*
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/*
* @test
* @bug 8020081 8022669
* @summary encryption/decryption test for using OAEPPadding with
* OAEPParameterSpec specified and not specified during a Cipher.init().
* @author Anthony Scarpino
*/
import java.util.Arrays;
import java.security.Security;
import java.security.Provider;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.MGF1ParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.spec.OAEPParameterSpec;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.spec.PSource;
public class TestOAEPPadding {
private static RSAPrivateKey privateKey;
private static RSAPublicKey publicKey;
static Provider cp;
static boolean failed = false;
public static void main(String args[]) throws Exception {
cp = Security.getProvider("SunJCE");
System.out.println("Testing provider " + cp.getName() + "...");
Provider kfp = Security.getProvider("SunRsaSign");
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", kfp);
kpg.initialize(2048);
KeyPair kp = kpg.generateKeyPair();
privateKey = (RSAPrivateKey)kp.getPrivate();
publicKey = (RSAPublicKey)kp.getPublic();
// Test using a spec with each digest algorithm case
// MD5
test(new OAEPParameterSpec("MD5", "MGF1",
MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("MD5", "MGF1",
MGF1ParameterSpec.SHA224, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("MD5", "MGF1",
MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("MD5", "MGF1",
MGF1ParameterSpec.SHA384, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("MD5", "MGF1",
MGF1ParameterSpec.SHA512, PSource.PSpecified.DEFAULT));
// SHA1
test(new OAEPParameterSpec("SHA1", "MGF1",
MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA1", "MGF1",
MGF1ParameterSpec.SHA224, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA1", "MGF1",
MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA1", "MGF1",
MGF1ParameterSpec.SHA384, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA1", "MGF1",
MGF1ParameterSpec.SHA512, PSource.PSpecified.DEFAULT));
// For default OAEPParameterSpec case (SHA1)
test(null);
// SHA-224
test(new OAEPParameterSpec("SHA-224", "MGF1",
MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-224", "MGF1",
MGF1ParameterSpec.SHA224, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-224", "MGF1",
MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-224", "MGF1",
MGF1ParameterSpec.SHA384, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-224", "MGF1",
MGF1ParameterSpec.SHA512, PSource.PSpecified.DEFAULT));
// SHA-256
test(new OAEPParameterSpec("SHA-256", "MGF1",
MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-256", "MGF1",
MGF1ParameterSpec.SHA224, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-256", "MGF1",
MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-256", "MGF1",
MGF1ParameterSpec.SHA384, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-256", "MGF1",
MGF1ParameterSpec.SHA512, PSource.PSpecified.DEFAULT));
// SHA-384
test(new OAEPParameterSpec("SHA-384", "MGF1",
MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-384", "MGF1",
MGF1ParameterSpec.SHA224, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-384", "MGF1",
MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-384", "MGF1",
MGF1ParameterSpec.SHA384, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-384", "MGF1",
MGF1ParameterSpec.SHA512, PSource.PSpecified.DEFAULT));
// SHA-512
test(new OAEPParameterSpec("SHA-512", "MGF1",
MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-512", "MGF1",
MGF1ParameterSpec.SHA224, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-512", "MGF1",
MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-512", "MGF1",
MGF1ParameterSpec.SHA384, PSource.PSpecified.DEFAULT));
test(new OAEPParameterSpec("SHA-512", "MGF1",
MGF1ParameterSpec.SHA512, PSource.PSpecified.DEFAULT));
if (failed) {
throw new Exception("Test failed");
}
}
/*
* Test with one byte, the max bytes, and the max + 1 bytes allowed by
* the RSA key size and the digest algorithm
*/
static void test(OAEPParameterSpec spec) throws Exception {
int dlen = 0;
String algo;
// For default OAEPParameterSpec case (SHA1)
if (spec == null) {
dlen = 20;
algo = "Default";
} else {
// Use the digest algorith provided in the spec
algo = spec.getDigestAlgorithm();
if (algo.equals("MD5")) {
dlen = 16;
} else if (algo.equals("SHA1")) {
dlen = 20;
} else if (algo.equals("SHA-224")) {
dlen = 28;
} else if (algo.equals("SHA-256")) {
dlen = 32;
} else if (algo.equals("SHA-384")) {
dlen = 48;
} else if (algo.equals("SHA-512")) {
dlen = 64;
}
}
// OAEP maximum length for a given digest algorith & RSA key length
int max = ((publicKey.getModulus().bitLength() / 8) - (2 * dlen) - 2);
// Test with data length of 1
try {
testEncryptDecrypt(spec, 1);
} catch (Exception e) {
System.out.println(algo + " failed with data length of 1");
e.printStackTrace();
failed = true;
}
// Test with data length of maximum allowed
try {
testEncryptDecrypt(spec, max);
} catch (Exception e) {
System.out.println(algo + " failed with data length of " + max);
e.printStackTrace();
failed = true;
}
// Test with data length of maximum allowed + 1
try {
testEncryptDecrypt(spec, max + 1);
throw new Exception();
} catch (IllegalBlockSizeException ie) {
// expected to fail
} catch (Exception e) {
System.err.println(algo + " failed with data length of " +
(max + 1));
e.printStackTrace();
failed = true;
}
}
private static void testEncryptDecrypt(OAEPParameterSpec spec,
int dataLength) throws Exception {
System.out.print("Testing OAEP with hash ");
if (spec != null) {
System.out.print(spec.getDigestAlgorithm() + " and MGF " +
((MGF1ParameterSpec)spec.getMGFParameters()).
getDigestAlgorithm());
} else {
System.out.print("Default");
}
System.out.println(", " + dataLength + " bytes");
Cipher c = Cipher.getInstance("RSA/ECB/OAEPPadding", cp);
if (spec != null) {
c.init(Cipher.ENCRYPT_MODE, publicKey, spec);
} else {
c.init(Cipher.ENCRYPT_MODE, publicKey);
}
byte[] data = new byte[dataLength];
byte[] enc = c.doFinal(data);
if (spec != null) {
c.init(Cipher.DECRYPT_MODE, privateKey, spec);
} else {
c.init(Cipher.DECRYPT_MODE, privateKey);
}
byte[] dec = c.doFinal(enc);
if (Arrays.equals(data, dec) == false) {
throw new Exception("Data does not match");
}
}
}