Java AlgorithmParameterGenerator类代码示例

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
protected AlgorithmParameterSpec generateParameterSpec(ASN1ObjectIdentifier macOID, SecretKey encKey)
    throws CMSException
{
    try
    {
        if (macOID.equals(PKCSObjectIdentifiers.RC2_CBC))
        {
            byte[] iv = new byte[8];

            random.nextBytes(iv);

            return new RC2ParameterSpec(encKey.getEncoded().length * 8, iv);
        }

        AlgorithmParameterGenerator pGen = helper.createAlgorithmParameterGenerator(macOID);

        AlgorithmParameters p = pGen.generateParameters();

        return p.getParameterSpec(IvParameterSpec.class);
    }
    catch (GeneralSecurityException e)
    {
        return null;
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
AlgorithmParameterGenerator createAlgorithmParameterGenerator(ASN1ObjectIdentifier algorithm)
    throws GeneralSecurityException
{
    String algorithmName = (String)BASE_CIPHER_NAMES.get(algorithm);

    if (algorithmName != null)
    {
        try
        {
            // this is reversed as the Sun policy files now allow unlimited strength RSA
            return helper.createAlgorithmParameterGenerator(algorithmName);
        }
        catch (NoSuchAlgorithmException e)
        {
            // Ignore
        }
    }
    return helper.createAlgorithmParameterGenerator(algorithm.getId());
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
private static void testDSAGenParameterSpec(DataTuple dataTuple)
        throws NoSuchAlgorithmException, NoSuchProviderException,
        InvalidParameterSpecException, InvalidAlgorithmParameterException {
    System.out.printf("Test case: primePLen=%d, " + "subprimeQLen=%d%n",
            dataTuple.primePLen, dataTuple.subprimeQLen);

    AlgorithmParameterGenerator apg
            = AlgorithmParameterGenerator.getInstance(ALGORITHM_NAME,
                    PROVIDER_NAME);

    DSAGenParameterSpec genParamSpec = createGenParameterSpec(dataTuple);
    // genParamSpec will be null if IllegalAE is thrown when expected.
    if (genParamSpec == null) {
        return;
    }

    try {
        apg.init(genParamSpec, null);
        AlgorithmParameters param = apg.generateParameters();

        checkParam(param, genParamSpec);
        System.out.println("Test case passed");
    } catch (InvalidParameterException ipe) {
        throw new RuntimeException("Test case failed.", ipe);
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
private static void testDSAGenParameterSpec(DataTuple dataTuple)
        throws NoSuchAlgorithmException, NoSuchProviderException,
        InvalidParameterSpecException, InvalidAlgorithmParameterException {
    System.out.printf("Test case: primePLen=%d, " + "subprimeQLen=%d%n",
            dataTuple.primePLen, dataTuple.subprimeQLen);

    AlgorithmParameterGenerator apg =
            AlgorithmParameterGenerator.getInstance(ALGORITHM_NAME,
                    PROVIDER_NAME);

    DSAGenParameterSpec genParamSpec = createGenParameterSpec(dataTuple);
    // genParamSpec will be null if IllegalAE is thrown when expected.
    if (genParamSpec == null) {
        return;
    }

    try {
        apg.init(genParamSpec, null);
        AlgorithmParameters param = apg.generateParameters();

        checkParam(param, genParamSpec);
        System.out.println("Test case passed");
    } catch (InvalidParameterException ipe) {
        throw new RuntimeException("Test case failed.", ipe);
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * The default authentication tag size should be 128-bit by default for the following reasons:
 * <br>
 * (1) Security: Ferguson, N., Authentication Weaknesses in GCM, Natl. Inst. Stand. Technol. [Web
 * page], http://www.csrc.nist.gov/groups/ST/toolkit/BCM/documents/comments/
 * CWC-GCM/Ferguson2.pdf, May 20, 2005. This paper points out that a n-bit tag has lower strength
 * than expected. <br>
 * (2) Compatibility: Assume an implementer tests some code using one provider than switches to
 * another provider. Such a switch should ideally not lower the security. <br>
 * BouncyCastle used to have only 12-byte authentication tag (b/26186727).
 */
@Test
public void testDefaultTagSizeAlgorithmParameterGenerator() throws Exception {
  byte[] input = new byte[10];
  byte[] key = new byte[16];
  Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
  try {
    AlgorithmParameterGenerator.getInstance("GCM");
  } catch (NoSuchAlgorithmException ex) {
    // Conscrypt does not support AlgorithmParameterGenerator for GCM.
    System.out.println("testDefaultTagSizeAlgorithmParameterGenerator:" + ex.toString());
    return;
  }
  AlgorithmParameters param = AlgorithmParameterGenerator.getInstance("GCM").generateParameters();
  cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "AES"), param);
  byte[] output = cipher.doFinal(input);
  assertEquals(input.length + 16, output.length);
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Use 1536 for Fast Prime Generation (less secure) or 2048 for slow prime generation (secure)
 * @param strength
 * @throws InvalidKeyException
 * @throws IllegalStateException
 * @throws InvalidAlgorithmParameterException
 * @throws NoSuchAlgorithmException
 * @throws NoSuchProviderException
 * @throws InvalidKeySpecException
 * @throws InvalidParameterSpecException
 */
public DHExchange(int strength) throws InvalidKeyException, IllegalStateException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchProviderException, InvalidKeySpecException, InvalidParameterSpecException {
	Security.addProvider(new org.spongycastle.jce.provider.BouncyCastleProvider());
	
	AlgorithmParameterGenerator paramGen = AlgorithmParameterGenerator.getInstance("DH", "SC");
	paramGen.init(strength); // number of bits
	AlgorithmParameters params = paramGen.generateParameters();
	DHParameterSpec dhSpec = (DHParameterSpec)params.getParameterSpec(DHParameterSpec.class);

	BigInteger p = dhSpec.getP();
	BigInteger g = dhSpec.getG();
	
    DHParameterSpec dhParams = new DHParameterSpec(p, g);
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "SC");
    keyGen.initialize(dhParams, new SecureRandom());
    KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "SC");
    KeyPair aPair = keyGen.generateKeyPair();
    KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "SC");
    KeyPair bPair = keyGen.generateKeyPair();

    aKeyAgree.init(aPair.getPrivate());
    bKeyAgree.init(bPair.getPrivate());
    
    aKeyAgree.doPhase(bPair.getPublic(), true);
    bKeyAgree.doPhase(aPair.getPublic(), true);
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
protected AlgorithmParameterGenerator[] createAPGen() {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return null;
    }
    AlgorithmParameterGenerator[] apg = new AlgorithmParameterGenerator[3];
    try {
        apg[0] = AlgorithmParameterGenerator.getInstance(validAlgName);
        apg[1] = AlgorithmParameterGenerator.getInstance(validAlgName,
                validProvider);
        apg[2] = AlgorithmParameterGenerator.getInstance(validAlgName,
                validProviderName);
        return apg;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Test for <code>getInstance(String algorithm)</code> method
 * Assertion: returns AlgorithmParameterGenerator instance
 * when algorithm is DSA
 */
@TestTargetNew(
    level = TestLevel.PARTIAL_COMPLETE,
    notes = "",
    method = "getInstance",
    args = {java.lang.String.class}
)
public void testAlgorithmParameterGenerator02()
        throws NoSuchAlgorithmException {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return;
    }
    AlgorithmParameterGenerator apg;
    for (int i = 0; i < algs.length; i++) {
        apg = AlgorithmParameterGenerator.getInstance(algs[i]);
        assertEquals("Incorrect algorithm", apg.getAlgorithm(), algs[i]);
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Test for <code>getInstance(String algorithm, String provider)</code>
 * method
 * Assertion: throws NoSuchProviderException if provider is not
 * available
 */
@TestTargetNew(
    level = TestLevel.PARTIAL_COMPLETE,
    notes = "",
    method = "getInstance",
    args = {java.lang.String.class, java.lang.String.class}
)
public void testAlgorithmParameterGenerator04()
        throws NoSuchAlgorithmException {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return;
    }
    for (int i = 0; i < algs.length; i++) {
        for (int j = 1; j < invalidValues.length; j++) {
            try {
                AlgorithmParameterGenerator.getInstance(algs[i],
                        invalidValues[j]);
                fail("NoSuchProviderException must be thrown (provider: "
                        .concat(invalidValues[j]));
            } catch (NoSuchProviderException e) {
            }
        }
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Test for <code>getInstance(String algorithm, String provider)</code>
 * method
 * Assertion: return AlgorithmParameterGenerator
 */
@TestTargetNew(
    level = TestLevel.PARTIAL_COMPLETE,
    notes = "",
    method = "getInstance",
    args = {java.lang.String.class, java.lang.String.class}
)
public void testAlgorithmParameterGenerator06()
        throws NoSuchAlgorithmException, NoSuchProviderException {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return;
    }
    AlgorithmParameterGenerator apg;
    for (int i = 0; i < algs.length; i++) {
        apg = AlgorithmParameterGenerator.getInstance(algs[i],
                validProviderName);
        assertEquals("Incorrect algorithm", algs[i], apg.getAlgorithm());
        assertEquals("Incorrect provider", apg.getProvider().getName(),
                validProviderName);
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Test for <code>getInstance(String algorithm, Provider provider)</code>
 * method
 * Assertion: throws IllegalArgumentException when provider is null
 */
@TestTargetNew(
    level = TestLevel.PARTIAL_COMPLETE,
    notes = "",
    method = "getInstance",
    args = {java.lang.String.class, java.security.Provider.class}
)
public void testAlgorithmParameterGenerator07()
        throws NoSuchAlgorithmException {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return;
    }
    Provider provider = null;
    for (int i = 0; i < algs.length; i++) {
        try {
            AlgorithmParameterGenerator.getInstance(algs[i], provider);
            fail("IllegalArgumentException must be thrown when provider is null");
        } catch (IllegalArgumentException e) {
        }
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Test for <code>getInstance(String algorithm, Provider provider)</code>
 * method
 * Assertion: returns AlgorithmParameterGenerator object
 */
@TestTargetNew(
    level = TestLevel.PARTIAL_COMPLETE,
    notes = "",
    method = "getInstance",
    args = {java.lang.String.class, java.security.Provider.class}
)
public void testAlgorithmParameterGenerator09()
        throws NoSuchAlgorithmException {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return;
    }
    AlgorithmParameterGenerator apg;
    for (int i = 0; i < algs.length; i++) {
        apg = AlgorithmParameterGenerator.getInstance(algs[i],
                validProvider);
        assertEquals("Incorrect algorithm", apg.getAlgorithm(), algs[i]);
        assertEquals("Incorrect provider", apg.getProvider(), validProvider);
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
/**
 * Test for <code>generateParameters()</code> method
 * Assertion: returns AlgorithmParameters object
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    notes = "",
    method = "generateParameters",
    args = {}
)
public void testAlgorithmParameterGenerator10()
        throws NoSuchAlgorithmException {
    if (!DSASupported) {
        fail(validAlgName + " algorithm is not supported");
        return;
    }
    AlgorithmParameterGenerator apg = AlgorithmParameterGenerator
            .getInstance(validAlgName);
    apg.init(512);
    AlgorithmParameters ap = apg.generateParameters();
    assertEquals("Incorrect algorithm", ap.getAlgorithm().toUpperCase(),
            apg.getAlgorithm().toUpperCase());
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
@Override
public void test() throws Exception {
    AlgorithmParameterGenerator apg = AlgorithmParameterGenerator.getInstance("DH");
    apg.init(1024, new SecureRandom());
    AlgorithmParameters ap = apg.generateParameters();
    DHParameterSpec ps = ap.getParameterSpec(DHParameterSpec.class);

    KeyAgreementGen kag1 = new KeyAgreementGen(ps);
    KeyAgreementGen kag2 = new KeyAgreementGen(ps);

    byte[] bArray1 = kag1.getPublicKeyBytes();
    byte[] bArray2 = kag2.getPublicKeyBytes();

    byte[] sk1 = kag1.getSecretKey(algName, bArray2);
    byte[] sk2 = kag2.getSecretKey(algName, bArray1);

    if (Arrays.areEqual(sk1, sk2) == false) {
        throw new Exception ("Generated keys are not the same");
    }
}
 

import java.security.AlgorithmParameterGenerator; //导入依赖的package包/类
@TestTargetNew(
    level = TestLevel.ADDITIONAL,
    method = "method",
    args = {}
)
@BrokenTest("Suffers from DH slowness, disabling for now")
public void testDHGen() throws Exception {
    KeyPairGenerator gen = null;
    try {
        gen = KeyPairGenerator.getInstance("DH");
    } catch (NoSuchAlgorithmException e) {
        fail(e.getMessage());
    }

    AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance("DH");
    algorithmparametergenerator.init(1024, new SecureRandom());
    AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
    DHParameterSpec dhparameterspec = algorithmparameters.getParameterSpec(DHParameterSpec.class);


    //gen.initialize(1024);
    gen.initialize(dhparameterspec);
    KeyPair key = gen.generateKeyPair();
}