Examples of ElGamalPublicKeyParameters

Examples of org.bouncycastle.crypto.params.ElGamalPublicKeyParameters

                engine.init(param);
                initialised = true;
            }


            AsymmetricCipherKeyPair         pair = engine.generateKeyPair();
            ElGamalPublicKeyParameters      pub = (ElGamalPublicKeyParameters)pair.getPublic();
            ElGamalPrivateKeyParameters     priv = (ElGamalPrivateKeyParameters)pair.getPrivate();


            return new KeyPair(new JCEElGamalPublicKey(pub),
                               new JCEElGamalPrivateKey(priv));
        }

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Examples of org.bouncycastle.crypto.params.ElGamalPublicKeyParameters

                engine.init(param);
                initialised = true;
            }


            AsymmetricCipherKeyPair         pair = engine.generateKeyPair();
            ElGamalPublicKeyParameters      pub = (ElGamalPublicKeyParameters)pair.getPublic();
            ElGamalPrivateKeyParameters     priv = (ElGamalPrivateKeyParameters)pair.getPrivate();


            return new KeyPair(new JCEElGamalPublicKey(pub),
                               new JCEElGamalPrivateKey(priv));
        }

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Examples of org.bouncycastle.crypto.params.ElGamalPublicKeyParameters

        else if (algId.getObjectId().equals(OIWObjectIdentifiers.elGamalAlgorithm))
        {
            ElGamalParameter    params = new ElGamalParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger          derY = (DERInteger)keyInfo.getPublicKey();


            return new ElGamalPublicKeyParameters(derY.getValue(), new ElGamalParameters(params.getP(), params.getG()));
        }
        else if (algId.getObjectId().equals(X9ObjectIdentifiers.id_dsa)
                 || algId.getObjectId().equals(OIWObjectIdentifiers.dsaWithSHA1))
        {
            DSAParameter    params = new DSAParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());

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Examples of org.bouncycastle.crypto.params.ElGamalPublicKeyParameters

            if (input.bitLength() >= p.bitLength())
            {
                throw new DataLengthException("input too large for ElGamal cipher.\n");
            }


            ElGamalPublicKeyParameters  pub = (ElGamalPublicKeyParameters)key;


            int                         pBitLength = p.bitLength();
            BigInteger                  k = new BigInteger(pBitLength, random);


            while (k.equals(ZERO) || (k.compareTo(p.subtract(TWO)) > 0))
            {
                k = new BigInteger(pBitLength, random);
            }


            BigInteger  g = key.getParameters().getG();
            BigInteger  gamma = g.modPow(k, p);
            BigInteger  phi = input.multiply(pub.getY().modPow(k, p)).mod(p);


            byte[]  out1 = gamma.toByteArray();
            byte[]  out2 = phi.toByteArray();
            byte[]  output = new byte[this.getOutputBlockSize()];

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Examples of org.bouncycastle2.crypto.params.ElGamalPublicKeyParameters

    {
        if (key instanceof ElGamalPublicKey)
        {
            ElGamalPublicKey    k = (ElGamalPublicKey)key;


            return new ElGamalPublicKeyParameters(k.getY(),
                new ElGamalParameters(k.getParameters().getP(), k.getParameters().getG()));
        }
        else if (key instanceof DHPublicKey)
        {
            DHPublicKey    k = (DHPublicKey)key;


            return new ElGamalPublicKeyParameters(k.getY(),
                new ElGamalParameters(k.getParams().getP(), k.getParams().getG()));
        }


        throw new InvalidKeyException("can't identify public key for El Gamal.");
    }

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Examples of org.bouncycastle2.crypto.params.ElGamalPublicKeyParameters

                engine.init(param);
                initialised = true;
            }


            AsymmetricCipherKeyPair         pair = engine.generateKeyPair();
            ElGamalPublicKeyParameters      pub = (ElGamalPublicKeyParameters)pair.getPublic();
            ElGamalPrivateKeyParameters     priv = (ElGamalPrivateKeyParameters)pair.getPrivate();


            return new KeyPair(new JCEElGamalPublicKey(pub),
                               new JCEElGamalPrivateKey(priv));
        }

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Examples of org.bouncycastle2.crypto.params.ElGamalPublicKeyParameters

            if (input.bitLength() >= p.bitLength())
            {
                throw new DataLengthException("input too large for ElGamal cipher.\n");
            }


            ElGamalPublicKeyParameters  pub = (ElGamalPublicKeyParameters)key;


            int                         pBitLength = p.bitLength();
            BigInteger                  k = new BigInteger(pBitLength, random);


            while (k.equals(ZERO) || (k.compareTo(p.subtract(TWO)) > 0))
            {
                k = new BigInteger(pBitLength, random);
            }


            BigInteger  g = key.getParameters().getG();
            BigInteger  gamma = g.modPow(k, p);
            BigInteger  phi = input.multiply(pub.getY().modPow(k, p)).mod(p);


            byte[]  out1 = gamma.toByteArray();
            byte[]  out2 = phi.toByteArray();
            byte[]  output = new byte[this.getOutputBlockSize()];

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Examples of org.bouncycastle2.crypto.params.ElGamalPublicKeyParameters


        BigInteger x = helper.calculatePrivate(dhp, param.getRandom()); 
        BigInteger y = helper.calculatePublic(dhp, x);


        return new AsymmetricCipherKeyPair(
            new ElGamalPublicKeyParameters(y, egp),
            new ElGamalPrivateKeyParameters(x, egp));
    }

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