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

/*
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 *
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/*
 * @test
 * @bug 4959235
 * @summary Verify that ARCFOUR KeyGenerator generate keys according
 * to the key length explicitly specified in the init() call.
 *
 * @author Valerie Peng
 */
import java.security.*;
import javax.crypto.*;
import java.util.*;

public class TestExplicitKeyLength {

    private static final String ALGOS[] = { "RC2", "ARCFOUR", "AES", "AES", "AES" };

    private static final int KEY_SIZES[] =
        { 64, 80, 128, 192, 256 }; // in bits

    public static void runTest(String algo, int keysize) throws Exception {
        KeyGenerator kg = KeyGenerator.getInstance(algo,
                                System.getProperty("test.provider.name", "SunJCE"));
        kg.init(keysize);
        Key generatedKey = kg.generateKey();
        int actualSizeInBits = generatedKey.getEncoded().length*8;
        if (actualSizeInBits != keysize) {
            throw new Exception("generated key has wrong length: " +
                                actualSizeInBits + " bits");
        }
    }

    public static void main (String[] args) throws Exception {
        for (int i = 0; i < ALGOS.length; i++) {
            System.out.println("Testing " + ALGOS[i] + " KeyGenerator with " +
                               KEY_SIZES[i] + "-bit keysize");
            runTest(ALGOS[i], KEY_SIZES[i]);
        }
        System.out.println("Tests Passed");
    }
}