Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.DSAParameters

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            }

            break;
        }

        return new DSAParameters(p, q, g, new DSAValidationParameters(seed, counter));
    }
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      else
      {
        pGen.init(strength, 20, new SecureRandom());
      }

            DSAParameters p = pGen.generateParameters();

            AlgorithmParameters params;

            try
            {
                params = AlgorithmParameters.getInstance("DSA", "BC");
                params.init(new DSAParameterSpec(p.getP(), p.getQ(), p.getG()));
            }
            catch (Exception e)
            {
                throw new RuntimeException(e.getMessage());
            }
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        else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_dsa))
        {
            ASN1Integer derX = (ASN1Integer)keyInfo.parsePrivateKey();
            ASN1Encodable de = algId.getParameters();

            DSAParameters parameters = null;
            if (de != null)
            {
                DSAParameter params = DSAParameter.getInstance(de.toASN1Primitive());
                parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
            }

            return new DSAPrivateKeyParameters(derX.getValue(), parameters);
        }
        else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey))
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            || algId.getAlgorithm().equals(OIWObjectIdentifiers.dsaWithSHA1))
        {
            ASN1Integer derY = (ASN1Integer)keyInfo.parsePublicKey();
            ASN1Encodable de = algId.getParameters();

            DSAParameters parameters = null;
            if (de != null)
            {
                DSAParameter params = DSAParameter.getInstance(de.toASN1Primitive());
                parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
            }

            return new DSAPublicKeyParameters(derY.getValue(), parameters);
        }
        else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey))
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            return new PrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE), new RSAPrivateKey(priv.getModulus(), priv.getPublicExponent(), priv.getExponent(), priv.getP(), priv.getQ(), priv.getDP(), priv.getDQ(), priv.getQInv()));
        }
        else if (privateKey instanceof DSAPrivateKeyParameters)
        {
            DSAPrivateKeyParameters priv = (DSAPrivateKeyParameters)privateKey;
            DSAParameters params = priv.getParameters();

            return new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_dsa, new DSAParameter(params.getP(), params.getQ(), params.getG())), new ASN1Integer(priv.getX()));
        }
        else
        {
            throw new IOException("key parameters not recognised.");
        }
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                if (p.isProbablePrime(certainty))
                {
                    BigInteger g = calculateGenerator_FIPS186_2(p, q, random);

                    return new DSAParameters(p, q, g, new DSAValidationParameters(seed, counter));
                }
            }
        }
    }
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                    if (usageIndex >= 0)
                    {
                        BigInteger g = calculateGenerator_FIPS186_3_Verifiable(d, p, q, seed, usageIndex);
                        if (g != null)
                        {
                           return new DSAParameters(p, q, g, new DSAValidationParameters(seed, counter, usageIndex));
                        }
                    }

                    BigInteger g = calculateGenerator_FIPS186_3_Unverifiable(p, q, random);

                    return new DSAParameters(p, q, g, new DSAValidationParameters(seed, counter));
                }

// 11.9 offset = offset + n + 1.      Comment: Increment offset; then, as part of
//                                    the loop in step 11, increment counter; if
//                                    counter < 4L, repeat steps 11.1 through 11.8.
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        this.param = (DSAKeyGenerationParameters)param;
    }

    public AsymmetricCipherKeyPair generateKeyPair()
    {
        DSAParameters dsaParams = param.getParameters();

        BigInteger x = generatePrivateKey(dsaParams.getQ(), param.getRandom());
        BigInteger y = calculatePublicKey(dsaParams.getP(), dsaParams.getG(), x);

        return new AsymmetricCipherKeyPair(
            new DSAPublicKeyParameters(y, dsaParams),
            new DSAPrivateKeyParameters(x, dsaParams));
    }
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        else
        {
            pGen.init(strength, 20, random);
        }

        DSAParameters p = pGen.generateParameters();

        AlgorithmParameters params;

        try
        {
            params = AlgorithmParameters.getInstance("DSA", BouncyCastleProvider.PROVIDER_NAME);
            params.init(new DSAParameterSpec(p.getP(), p.getQ(), p.getG()));
        }
        catch (Exception e)
        {
            throw new RuntimeException(e.getMessage());
        }
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        {
            throw new InvalidAlgorithmParameterException("parameter object not a DSAParameterSpec");
        }
        DSAParameterSpec dsaParams = (DSAParameterSpec)params;

        param = new DSAKeyGenerationParameters(random, new DSAParameters(dsaParams.getP(), dsaParams.getQ(), dsaParams.getG()));

        engine.init(param);
        initialised = true;
    }
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Related Classes of org.bouncycastle.crypto.params.DSAParameters

  • com.jcraft.jsch.bc.KeyPairGenDSA
  • com.jcraft.jsch.bc.SignatureDSA
  • org.bouncycastle.crypto.generators.DSAKeyPairGenerator
  • org.bouncycastle.crypto.generators.DSAParametersGenerator
  • org.bouncycastle.crypto.signers.DSASigner
  • org.bouncycastle.crypto.test.DSATest
  • org.bouncycastle.crypto.util.PrivateKeyFactory
  • org.bouncycastle.crypto.util.PrivateKeyInfoFactory
  • org.bouncycastle.crypto.util.PublicKeyFactory
  • org.bouncycastle.jcajce.provider.asymmetric.dsa.AlgorithmParameterGeneratorSpi
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