Example usage for org.bouncycastle.asn1.oiw OIWObjectIdentifiers elGamalAlgorithm

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.oiw OIWObjectIdentifiers elGamalAlgorithm.

Prototype

ASN1ObjectIdentifier elGamalAlgorithm

To view the source code for org.bouncycastle.asn1.oiw OIWObjectIdentifiers elGamalAlgorithm.

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Document

 ElGamal Algorithm OBJECT IDENTIFIER ::=     {iso(1) identified-organization(3) oiw(14) dirservsig(7) algorithm(2) encryption(1) 1 }

OID: 1.3.14.7.2.1.1

Usage

From source file:ElGamalPrivatePGKey.java

License:Open Source License

/**
 * Return a PKCS8 representation of the key. The sequence returned
 * represents a full PrivateKeyInfo object.
 *
 * @return a PKCS8 representation of the key.
 *///from ww w.  j  a v  a  2  s  . c o m
public byte[] getEncoded() {
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    DEROutputStream dOut = new DEROutputStream(bOut);
    PrivateKeyInfo info = new PrivateKeyInfo(new AlgorithmIdentifier(OIWObjectIdentifiers.elGamalAlgorithm,
            new ElGamalParameter(elSpec.getP(), elSpec.getG()).getDERObject()), new DERInteger(getX()));

    try {
        dOut.writeObject(info);
        dOut.close();
    } catch (IOException e) {
        throw new RuntimeException("Error encoding ElGamal private key");
    }

    return bOut.toByteArray();
}

From source file:ElGamalPublicPGKey.java

License:Open Source License

public byte[] getEncoded() {
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    DEROutputStream dOut = new DEROutputStream(bOut);
    SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
            new AlgorithmIdentifier(OIWObjectIdentifiers.elGamalAlgorithm,
                    new ElGamalParameter(elSpec.getP(), elSpec.getG()).getDERObject()),
            new DERInteger(y));

    try {/*  w  ww  .  j  a v  a2 s  .co  m*/
        dOut.writeObject(info);
        dOut.close();
    } catch (IOException e) {
        throw new RuntimeException("Error encoding ElGamal public key");
    }

    return bOut.toByteArray();

}

From source file:net.jradius.client.auth.EAPTLSAuthenticator.java

License:Open Source License

/**
 * Create a private key parameter from the passed in PKCS8 PrivateKeyInfo object.
 * //w ww.jav  a  2  s. c o m
 * @param keyInfo the PrivateKeyInfo object containing the key material
 * @return a suitable private key parameter
 * @throws IOException on an error decoding the key
 */
public static AsymmetricKeyParameter createKey(PrivateKeyInfo keyInfo) throws IOException {
    AlgorithmIdentifier algId = keyInfo.getAlgorithmId();

    if (algId.getObjectId().equals(PKCSObjectIdentifiers.rsaEncryption)) {
        RSAPrivateKeyStructure keyStructure = new RSAPrivateKeyStructure(
                (ASN1Sequence) keyInfo.getPrivateKey());

        return new RSAPrivateCrtKeyParameters(keyStructure.getModulus(), keyStructure.getPublicExponent(),
                keyStructure.getPrivateExponent(), keyStructure.getPrime1(), keyStructure.getPrime2(),
                keyStructure.getExponent1(), keyStructure.getExponent2(), keyStructure.getCoefficient());
    } else if (algId.getObjectId().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
        DHParameter params = new DHParameter((ASN1Sequence) keyInfo.getAlgorithmId().getParameters());
        DERInteger derX = (DERInteger) keyInfo.getPrivateKey();

        BigInteger lVal = params.getL();
        int l = lVal == null ? 0 : lVal.intValue();
        DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);

        return new DHPrivateKeyParameters(derX.getValue(), dhParams);
    } else if (algId.getObjectId().equals(OIWObjectIdentifiers.elGamalAlgorithm)) {
        ElGamalParameter params = new ElGamalParameter((ASN1Sequence) keyInfo.getAlgorithmId().getParameters());
        DERInteger derX = (DERInteger) keyInfo.getPrivateKey();

        return new ElGamalPrivateKeyParameters(derX.getValue(),
                new ElGamalParameters(params.getP(), params.getG()));
    } else if (algId.getObjectId().equals(X9ObjectIdentifiers.id_dsa)) {
        DERInteger derX = (DERInteger) keyInfo.getPrivateKey();
        DEREncodable de = keyInfo.getAlgorithmId().getParameters();

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

        return new DSAPrivateKeyParameters(derX.getValue(), parameters);
    } else if (algId.getObjectId().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
        X962Parameters params = new X962Parameters((DERObject) keyInfo.getAlgorithmId().getParameters());
        ECDomainParameters dParams = null;

        if (params.isNamedCurve()) {
            DERObjectIdentifier oid = (DERObjectIdentifier) params.getParameters();
            X9ECParameters ecP = X962NamedCurves.getByOID(oid);

            if (ecP == null) {
                ecP = SECNamedCurves.getByOID(oid);

                if (ecP == null) {
                    ecP = NISTNamedCurves.getByOID(oid);

                    if (ecP == null) {
                        ecP = TeleTrusTNamedCurves.getByOID(oid);
                    }
                }
            }

            dParams = new ECDomainParameters(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
        } else {
            X9ECParameters ecP = new X9ECParameters((ASN1Sequence) params.getParameters());
            dParams = new ECDomainParameters(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
        }

        ECPrivateKeyStructure ec = new ECPrivateKeyStructure((ASN1Sequence) keyInfo.getPrivateKey());

        return new ECPrivateKeyParameters(ec.getKey(), dParams);
    } else {
        throw new RuntimeException("algorithm identifier in key not recognised");
    }
}

From source file:org.xwiki.crypto.internal.asymmetric.keyfactory.DefaultKeyFactory.java

License:Open Source License

private String getKeyFactoryHint(ASN1Object keyInfo) {
    ASN1ObjectIdentifier algId = getAlgorithmId(keyInfo);

    String hint = null;/*from   w  w  w.  j av a2  s .  co m*/

    if (RSAUtil.isRsaOid(algId)) {
        hint = "RSA";
    } else if (DSAUtil.isDsaOid(algId)) {
        hint = "DSA";
    } else if (algId.equals(PKCSObjectIdentifiers.dhKeyAgreement)
            || algId.equals(X9ObjectIdentifiers.dhpublicnumber)) {
        hint = "DH";
    } else if (algId.equals(OIWObjectIdentifiers.elGamalAlgorithm)) {
        hint = "ElGamal";
    } else if (algId.equals(CryptoProObjectIdentifiers.gostR3410_94)) {
        hint = "GOST3410";
    }

    if (hint == null) {
        throw new UnsupportedOperationException("Asymmetric key algorithm not supported: " + algId.getId());
    }

    return hint;
}