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/*

 * @test

 * @bug 4923484

 * @summary encryption/decryption test for using OAEPParameterSpec.

 * @author Valerie Peng

 */

import java.util.*;

import java.security.*;

import java.security.spec.MGF1ParameterSpec;

import javax.crypto.*;

import javax.crypto.spec.PSource;

import javax.crypto.spec.OAEPParameterSpec;

public class TestOAEPWithParams {

    private static Provider cp;

    private static PrivateKey privateKey;

    private static PublicKey publicKey;

    private static Random random = new Random();

    private static String MD[] = {

    };

    private static int DATA_LENGTH[] = {

    };

    public static void main(String[] args) throws Exception {

        long start = System.currentTimeMillis();

        cp = Security.getProvider("SunJCE");

        System.out.println("Testing provider " + cp.getName() + "...");

        Provider kfp = Security.getProvider("SunRsaSign");

        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", kfp);

        kpg.initialize(768);

        KeyPair kp = kpg.generateKeyPair();

        privateKey = kp.getPrivate();

        publicKey = kp.getPublic();

        for (int i = 0; i < MD.length; i++) {

            // basic test using MD5

            testEncryptDecrypt(MD[i], DATA_LENGTH[i]);

        }

        long stop = System.currentTimeMillis();

        System.out.println("Done (" + (stop - start) + " ms).");

    }

    private static void testEncryptDecrypt(String hashAlg, int dataLength)

        throws Exception {

        System.out.println("Testing OAEP with hash " + hashAlg + ", " + dataLength + " bytes");

        Cipher c = Cipher.getInstance("RSA/ECB/OAEPwith" + hashAlg +

                                      "andMGF1Padding", cp);

        byte[] pSrc1 = { (byte) 0x01, (byte) 0x01, (byte) 0x01, (byte) 0x01,

                         (byte) 0x02, (byte) 0x02, (byte) 0x02, (byte) 0x02

        };

        byte[] pSrc2 = { (byte) 0x01, (byte) 0x01, (byte) 0x01, (byte) 0x01,

                         (byte) 0x02, (byte) 0x02, (byte) 0x03, (byte) 0x04

        };

        OAEPParameterSpec spec1 = new OAEPParameterSpec(hashAlg,

            "MGF1", MGF1ParameterSpec.SHA1, new PSource.PSpecified(pSrc1));

        OAEPParameterSpec spec2 = new OAEPParameterSpec(hashAlg,

            "MGF1", MGF1ParameterSpec.SHA1, new PSource.PSpecified(pSrc2));

        byte[] plainText = new byte[dataLength];

        byte[] cipherText, recovered;

        // do encryption with parameters#1

        System.out.println("Testing with user-supplied parameters...");

        c.init(Cipher.ENCRYPT_MODE, publicKey, spec1);

        cipherText = c.doFinal(plainText);

        // test#1: decrypt with parameters#1

        c.init(Cipher.DECRYPT_MODE, privateKey, spec1);

        recovered = c.doFinal(cipherText);

        if (Arrays.equals(plainText, recovered) == false) {

            throw new Exception("Decrypted data does not match");

        }

        // test#2: decrypt without parameters

        c.init(Cipher.DECRYPT_MODE, privateKey);

        try {

            recovered = c.doFinal(cipherText);

            throw new Exception("Should throw BadPaddingException");

        } catch (BadPaddingException bpe) {

            // expected

        }

        // test#3: decrypt with different parameters

        c.init(Cipher.DECRYPT_MODE, privateKey, spec2);

        try {

            recovered = c.doFinal(cipherText);

            throw new Exception("Should throw BadPaddingException");

        } catch (BadPaddingException bpe) {

            // expected

        }

        // do encryption without parameters

        System.out.println("Testing with cipher default parameters...");

        c.init(Cipher.ENCRYPT_MODE, publicKey);

        cipherText = c.doFinal(plainText);

        // test#1: decrypt with parameters got from cipher

        AlgorithmParameters params = c.getParameters();

        c.init(Cipher.DECRYPT_MODE, privateKey, params);

        recovered = c.doFinal(cipherText);

        if (Arrays.equals(plainText, recovered) == false) {

            throw new Exception("Decrypted data does not match");

        }

        // test#2: decrypt without parameters

        c.init(Cipher.DECRYPT_MODE, privateKey);

        recovered = c.doFinal(cipherText);

        if (Arrays.equals(plainText, recovered) == false) {

            throw new Exception("Decrypted data does not match");

        }

        // test#3: decrypt with different parameters

        c.init(Cipher.DECRYPT_MODE, privateKey, spec2);

        try {

            recovered = c.doFinal(cipherText);

            throw new Exception("Should throw BadPaddingException");

        } catch (BadPaddingException bpe) {

            // expected

        }

    }

}