test/jdk/com/sun/crypto/provider/KeyGenerator/Test4628062.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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/*
 * @test
 * @bug 4628062 4963723 8267319 8288050
 * @summary Verify that AES KeyGenerator supports default initialization
 *      when init is not called
 * @author Valerie Peng
 */
import java.security.*;
import javax.crypto.*;
import java.util.*;

public class Test4628062 {

    // first value is the default key size
    private static final int[] AES_SIZES = { 32, 16, 24 }; // in bytes
    private static final int[] HMACSHA224_SIZES = { 28 };
    private static final int[] HMACSHA256_SIZES = { 32 };
    private static final int[] HMACSHA384_SIZES = { 48 };
    private static final int[] HMACSHA512_SIZES = { 64 };
    private static final int[] HMACSHA512_224_SIZES = { 28 };
    private static final int[] HMACSHA512_256_SIZES = { 32 };

    public boolean execute(String algo, int[] keySizes) throws Exception {
        KeyGenerator kg = KeyGenerator.getInstance(algo,
                System.getProperty("test.provider.name", "SunJCE"));

        // TEST FIX 4628062
        Key keyWithDefaultSize = kg.generateKey();
        byte[] encoding = keyWithDefaultSize.getEncoded();
        int defKeyLen = encoding.length ;
        if (defKeyLen == 0) {
            throw new Exception("default key length is 0!");
        } else if (defKeyLen != keySizes[0]) {
            throw new Exception("default key length mismatch!");
        }

        // BONUS TESTS
        if (keySizes.length > 1) {
            // 1. call init(int keysize) with various valid key sizes
            // and see if the generated key is the right size.
            for (int i=0; i<keySizes.length; i++) {
                kg.init(keySizes[i]*8); // in bits
                Key key = kg.generateKey();
                if (key.getEncoded().length != keySizes[i]) {
                    throw new Exception("key is generated with the wrong length!");
                }
            }
            // 2. call init(int keysize) with invalid key size and see
            // if the expected InvalidParameterException is thrown.
            try {
                kg.init(keySizes[0]*8+1);
            } catch (InvalidParameterException ex) {
            } catch (Exception ex) {
                throw new Exception("wrong exception is thrown for invalid key size!");
            }
        }
        System.out.println(algo + " Passed!");
        // passed all tests...hooray!
        return true;
    }

    public static void main (String[] args) throws Exception {
        Test4628062 test = new Test4628062();

        test.execute("AES", AES_SIZES);
        test.execute("HmacSHA224", HMACSHA224_SIZES);
        test.execute("HmacSHA256", HMACSHA256_SIZES);
        test.execute("HmacSHA384", HMACSHA384_SIZES);
        test.execute("HmacSHA512", HMACSHA512_SIZES);
        test.execute("HmacSHA512/224", HMACSHA512_224_SIZES);
        test.execute("HmacSHA512/256", HMACSHA512_256_SIZES);
    }
}