Package java.security

Examples of java.security.AlgorithmParameterGenerator.generateParameters()

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    {

        String s = "1.2.840.113549.3.2";

        AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
        AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
        ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(algorithmparameters.getEncoded("ASN.1"));
        ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
        DERObject derobject = asn1inputstream.readObject();
        KeyGenerator keygenerator = KeyGenerator.getInstance(s);
        keygenerator.init(128);
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    AlgorithmParameterGenerator gen = AlgorithmParameterGenerator
        .getInstance("DSA");
    gen.init(1024);

    // WARNING - The next line can take MINUTES to run
    AlgorithmParameters params = gen.generateParameters();
    assertNotNull("params is null", params);
  }

  /**
   * @tests java.security.AlgorithmParameterGenerator#getAlgorithm()
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    {

        String s = "1.2.840.113549.3.2";

        AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
        AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
        ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(algorithmparameters.getEncoded("ASN.1"));
        ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
        ASN1Primitive derobject = asn1inputstream.readObject();
        KeyGenerator keygenerator = KeyGenerator.getInstance(s);
        keygenerator.init(128);
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        int         size)
        throws Exception
    {
        AlgorithmParameterGenerator a = AlgorithmParameterGenerator.getInstance("DH", "BC");
        a.init(size, new SecureRandom());
        AlgorithmParameters params = a.generateParameters();

        byte[] encodeParams = params.getEncoded();

        AlgorithmParameters a2 = AlgorithmParameters.getInstance("DH", "BC");
        a2.init(encodeParams);
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    private void testParameters()
        throws Exception
    {
        AlgorithmParameterGenerator a = AlgorithmParameterGenerator.getInstance("DSA", "BC");
        a.init(512, random);
        AlgorithmParameters params = a.generateParameters();
       
        byte[] encodeParams = params.getEncoded();
       
        AlgorithmParameters a2 = AlgorithmParameters.getInstance("DSA", "BC");
        a2.init(encodeParams);
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           InvalidAlgorithmParameterException,
           InvalidParameterSpecException,
           InvalidKeySpecException  {
    AlgorithmParameterGenerator pgen = AlgorithmParameterGenerator.getInstance("DH");
    pgen.init(512);
    AlgorithmParameters params = pgen.generateParameters();
    DHParameterSpec dhspec = (DHParameterSpec)params.getParameterSpec(DHParameterSpec.class);
    KeyPairGenerator keypairgen = KeyPairGenerator.getInstance("DH");
    keypairgen.initialize(dhspec);  
    keyPair = keypairgen.generateKeyPair();
    p = dhspec.getP();
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    private void init() throws NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidParameterSpecException, InvalidKeySpecException {
        AlgorithmParameterGenerator pgen = AlgorithmParameterGenerator.getInstance("DH");
        pgen.init(512);
        AlgorithmParameters params = pgen.generateParameters();
        DHParameterSpec dhspec = (DHParameterSpec)params.getParameterSpec(DHParameterSpec.class);
        KeyPairGenerator keypairgen = KeyPairGenerator.getInstance("DH");
        keypairgen.initialize(dhspec);
        keyPair = keypairgen.generateKeyPair();
        p = dhspec.getP();
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    {

        String s = "1.2.840.113549.3.2";

        AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
        AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
        ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(algorithmparameters.getEncoded("ASN.1"));
        ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
        DERObject derobject = asn1inputstream.readObject();
        KeyGenerator keygenerator = KeyGenerator.getInstance(s);
        keygenerator.init(128);
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    {

        String s = "1.2.840.113549.3.2";

        AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
        AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
        ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(algorithmparameters.getEncoded("ASN.1"));
        ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
        DERObject derobject = asn1inputstream.readObject();
        KeyGenerator keygenerator = KeyGenerator.getInstance(s);
        keygenerator.init(128);
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            for (int pSize = 257; pSize < 264; ++pSize)
            {
                // Generate some parameters of the given size
                AlgorithmParameterGenerator a = AlgorithmParameterGenerator.getInstance("ElGamal", "BC");
                a.init(pSize, new SecureRandom());
                AlgorithmParameters params = a.generateParameters();

                DHParameterSpec elP = (DHParameterSpec)params.getParameterSpec(DHParameterSpec.class);
                KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ElGamal", "BC");

                keyGen.initialize(elP);
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