Examples with ElGamalParameter com.github.zhenwei.core.asn1.oiw.ElGamalParameter used on opensource projects

Example 1 with ElGamalParameter

use of com.github.zhenwei.core.asn1.oiw.ElGamalParameter in project LinLong-Java by zhenwei1108.

the class AlgorithmParametersSpi method engineInit.

protected void engineInit(byte[] params) throws IOException {
    try {
        ElGamalParameter elP = ElGamalParameter.getInstance(ASN1Primitive.fromByteArray(params));
        currentSpec = new ElGamalParameterSpec(elP.getP(), elP.getG());
    } catch (ClassCastException e) {
        throw new IOException("Not a valid ElGamal Parameter encoding.");
    } catch (ArrayIndexOutOfBoundsException e) {
        throw new IOException("Not a valid ElGamal Parameter encoding.");
    }
}

Example 2 with ElGamalParameter

use of com.github.zhenwei.core.asn1.oiw.ElGamalParameter in project LinLong-Java by zhenwei1108.

the class PrivateKeyFactory method createKey.

/**
 * Create a private key parameter from the passed in PKCS8 PrivateKeyInfo object.
 *
 * @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.getPrivateKeyAlgorithm();
    ASN1ObjectIdentifier algOID = algId.getAlgorithm();
    if (algOID.equals(PKCSObjectIdentifiers.rsaEncryption) || algOID.equals(PKCSObjectIdentifiers.id_RSASSA_PSS) || algOID.equals(X509ObjectIdentifiers.id_ea_rsa)) {
        RSAPrivateKey keyStructure = RSAPrivateKey.getInstance(keyInfo.parsePrivateKey());
        return new RSAPrivateCrtKeyParameters(keyStructure.getModulus(), keyStructure.getPublicExponent(), keyStructure.getPrivateExponent(), keyStructure.getPrime1(), keyStructure.getPrime2(), keyStructure.getExponent1(), keyStructure.getExponent2(), keyStructure.getCoefficient());
    } else // else if (algOID.equals(X9ObjectIdentifiers.dhpublicnumber))
    if (algOID.equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
        DHParameter params = DHParameter.getInstance(algId.getParameters());
        ASN1Integer derX = (ASN1Integer) keyInfo.parsePrivateKey();
        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 (algOID.equals(OIWObjectIdentifiers.elGamalAlgorithm)) {
        ElGamalParameter params = ElGamalParameter.getInstance(algId.getParameters());
        ASN1Integer derX = (ASN1Integer) keyInfo.parsePrivateKey();
        return new ElGamalPrivateKeyParameters(derX.getValue(), new ElGamalParameters(params.getP(), params.getG()));
    } else if (algOID.equals(X9ObjectIdentifiers.id_dsa)) {
        ASN1Integer derX = (ASN1Integer) keyInfo.parsePrivateKey();
        ASN1Encodable algParameters = algId.getParameters();
        DSAParameters parameters = null;
        if (algParameters != null) {
            DSAParameter params = DSAParameter.getInstance(algParameters.toASN1Primitive());
            parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
        }
        return new DSAPrivateKeyParameters(derX.getValue(), parameters);
    } else if (algOID.equals(X9ObjectIdentifiers.id_ecPublicKey)) {
        X962Parameters params = X962Parameters.getInstance(algId.getParameters());
        X9ECParameters x9;
        ECDomainParameters dParams;
        if (params.isNamedCurve()) {
            ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier) params.getParameters();
            x9 = CustomNamedCurves.getByOID(oid);
            if (x9 == null) {
                x9 = ECNamedCurveTable.getByOID(oid);
            }
            dParams = new ECNamedDomainParameters(oid, x9);
        } else {
            x9 = X9ECParameters.getInstance(params.getParameters());
            dParams = new ECDomainParameters(x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());
        }
        ECPrivateKey ec = ECPrivateKey.getInstance(keyInfo.parsePrivateKey());
        BigInteger d = ec.getKey();
        return new ECPrivateKeyParameters(d, dParams);
    } else if (algOID.equals(EdECObjectIdentifiers.id_X25519)) {
        return new X25519PrivateKeyParameters(getRawKey(keyInfo));
    } else if (algOID.equals(EdECObjectIdentifiers.id_X448)) {
        return new X448PrivateKeyParameters(getRawKey(keyInfo));
    } else if (algOID.equals(EdECObjectIdentifiers.id_Ed25519)) {
        return new Ed25519PrivateKeyParameters(getRawKey(keyInfo));
    } else if (algOID.equals(EdECObjectIdentifiers.id_Ed448)) {
        return new Ed448PrivateKeyParameters(getRawKey(keyInfo));
    } else if (algOID.equals(CryptoProObjectIdentifiers.gostR3410_2001) || algOID.equals(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512) || algOID.equals(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256)) {
        ASN1Encodable algParameters = algId.getParameters();
        GOST3410PublicKeyAlgParameters gostParams = GOST3410PublicKeyAlgParameters.getInstance(algParameters);
        ECGOST3410Parameters ecSpec = null;
        BigInteger d = null;
        ASN1Primitive p = algParameters.toASN1Primitive();
        if (p instanceof ASN1Sequence && (ASN1Sequence.getInstance(p).size() == 2 || ASN1Sequence.getInstance(p).size() == 3)) {
            X9ECParameters ecP = ECGOST3410NamedCurves.getByOIDX9(gostParams.getPublicKeyParamSet());
            ecSpec = new ECGOST3410Parameters(new ECNamedDomainParameters(gostParams.getPublicKeyParamSet(), ecP), gostParams.getPublicKeyParamSet(), gostParams.getDigestParamSet(), gostParams.getEncryptionParamSet());
            ASN1OctetString privEnc = keyInfo.getPrivateKey();
            if (privEnc.getOctets().length == 32 || privEnc.getOctets().length == 64) {
                d = new BigInteger(1, Arrays.reverse(privEnc.getOctets()));
            } else {
                ASN1Encodable privKey = keyInfo.parsePrivateKey();
                if (privKey instanceof ASN1Integer) {
                    d = ASN1Integer.getInstance(privKey).getPositiveValue();
                } else {
                    byte[] dVal = Arrays.reverse(ASN1OctetString.getInstance(privKey).getOctets());
                    d = new BigInteger(1, dVal);
                }
            }
        } else {
            X962Parameters params = X962Parameters.getInstance(algId.getParameters());
            if (params.isNamedCurve()) {
                ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters());
                X9ECParameters ecP = ECNamedCurveTable.getByOID(oid);
                ecSpec = new ECGOST3410Parameters(new ECNamedDomainParameters(oid, ecP), gostParams.getPublicKeyParamSet(), gostParams.getDigestParamSet(), gostParams.getEncryptionParamSet());
            } else if (params.isImplicitlyCA()) {
                ecSpec = null;
            } else {
                X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters());
                ecSpec = new ECGOST3410Parameters(new ECNamedDomainParameters(algOID, ecP), gostParams.getPublicKeyParamSet(), gostParams.getDigestParamSet(), gostParams.getEncryptionParamSet());
            }
            ASN1Encodable privKey = keyInfo.parsePrivateKey();
            if (privKey instanceof ASN1Integer) {
                ASN1Integer derD = ASN1Integer.getInstance(privKey);
                d = derD.getValue();
            } else {
                ECPrivateKey ec = ECPrivateKey.getInstance(privKey);
                d = ec.getKey();
            }
        }
        return new ECPrivateKeyParameters(d, new ECGOST3410Parameters(ecSpec, gostParams.getPublicKeyParamSet(), gostParams.getDigestParamSet(), gostParams.getEncryptionParamSet()));
    } else {
        throw new RuntimeException("algorithm identifier in private key not recognised");
    }
}