Example usage for org.bouncycastle.asn1.x9 ECNamedCurveTable getByName

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.x9 ECNamedCurveTable getByName.

Prototype

public static X9ECParameters getByName(String name) 

Source Link

Document

return a X9ECParameters object representing the passed in named curve.

Usage

From source file:com.github.horrorho.inflatabledonkey.crypto.ec.ECAssistant.java

License:Open Source License

public static X9ECParameters x9ECParameters(String curveName) {
    X9ECParameters x9ECParameters = ECNamedCurveTable.getByName(curveName);
    if (x9ECParameters == null) {
        throw new IllegalArgumentException("unsupported elliptic curve: " + curveName);
    }/* w  ww.  jav a  2  s . c  om*/
    return x9ECParameters;
}

---

From source file:com.github.horrorho.inflatabledonkey.crypto.eckey.ECAssistant.java

License:Open Source License

public static X9ECParameters x9ECParameters(String curveName) {
    X9ECParameters x9ECParameters = ECNamedCurveTable.getByName(curveName);
    if (x9ECParameters == null) {
        throw new IllegalArgumentException("ec curve not found: " + curveName);
    }/*from  w  w w. ja  v a 2s . c o  m*/
    return x9ECParameters;
}

---

From source file:com.github.horrorho.inflatabledonkey.crypto.rfc6637.RFC6637.java

License:Open Source License

ECPoint decodePoint(byte[] data) {
    ECCurve curve = ECNamedCurveTable.getByName(curveName).getCurve();
    int compactExportSize = (curve.getFieldSize() + 7) / 8;

    return data.length == compactExportSize ? ECPointsCompact.decodeFPPoint(curve, data) // Compact keys support, non RFC6636 compliant.
            : curve.decodePoint(data);//from ww w.jav  a 2 s. c o  m
}

---

From source file:com.yahoo.athenz.zts.store.DataStore.java

License:Apache License

String getCurveName(org.bouncycastle.jce.spec.ECParameterSpec ecParameterSpec) {

    String curveName = null;//  w ww. j  av a2  s  . co m
    for (Enumeration names = ECNamedCurveTable.getNames(); names.hasMoreElements();) {

        final String name = (String) names.nextElement();
        final X9ECParameters params = ECNamedCurveTable.getByName(name);

        if (params.getN().equals(ecParameterSpec.getN()) && params.getH().equals(ecParameterSpec.getH())
                && params.getCurve().equals(ecParameterSpec.getCurve())
                && params.getG().equals(ecParameterSpec.getG())) {
            curveName = name;
            break;
        }
    }
    return curveName;
}

---

From source file:org.cryptoworkshop.ximix.node.crypto.key.ECKeyPairGenerator.java

License:Apache License

public MessageReply handle(final KeyPairGenerateMessage message) {
    // TODO: sort out the reply messages
    try {/*from  w  w  w .j  ava2  s  .c  o  m*/
        switch (((Type) message.getType())) {
        case GENERATE:
            final NamedKeyGenParams ecKeyGenParams = (NamedKeyGenParams) NamedKeyGenParams
                    .getInstance(message.getPayload());
            final List<String> involvedPeers = ecKeyGenParams.getNodesToUse();

            X9ECParameters params = CustomNamedCurves.getByName(ecKeyGenParams.getDomainParameters());

            if (params == null) {
                params = ECNamedCurveTable.getByName(ecKeyGenParams.getDomainParameters());
            }

            paramsMap.put(ecKeyGenParams.getKeyID(), new ECDomainParameters(params.getCurve(), params.getG(),
                    params.getN(), params.getH(), params.getSeed()));

            sharedHMap.init(ecKeyGenParams.getKeyID(), involvedPeers.size());

            BigInteger h = generateH(params.getN(), new SecureRandom()); // TODO: provide randomness?
            ECPoint[] messages = new ECPoint[involvedPeers.size()];

            for (int i = 0; i != messages.length; i++) {
                messages[i] = params.getG().multiply(h);
            }

            nodeContext.execute(
                    new SendHTask(message.getAlgorithm(), ecKeyGenParams.getKeyID(), involvedPeers, messages));

            final List<String> peerList = ecKeyGenParams.getNodesToUse();

            ECNewDKGGenerator generator = (ECNewDKGGenerator) nodeContext
                    .getKeyPairGenerator(ecKeyGenParams.getAlgorithm());

            ECCommittedSecretShareMessage[] comMessages = generator.generateThresholdKey(
                    ecKeyGenParams.getKeyID(), paramsMap.get(ecKeyGenParams.getKeyID()), peerList.size(),
                    ecKeyGenParams.getThreshold(),
                    sharedHMap.getShare(ecKeyGenParams.getKeyID()).getValue().normalize());

            nodeContext.execute(new SendShareTask(generator, message.getAlgorithm(), ecKeyGenParams.getKeyID(),
                    peerList, comMessages));

            return new MessageReply(MessageReply.Type.OKAY);
        case STORE_H:
            StoreMessage storeMessage = StoreMessage.getInstance(message.getPayload());
            ShareMessage shareMessage = ShareMessage.getInstance(storeMessage.getSecretShareMessage());

            nodeContext.execute(new StoreHTask(storeMessage.getID(), shareMessage));

            return new MessageReply(MessageReply.Type.OKAY);
        case STORE:
            StoreMessage sssMessage = StoreMessage.getInstance(message.getPayload());

            // we may not have been asked to generate our share yet, if this is the case we need to queue up our share requests
            // till we can validate them.
            generator = (ECNewDKGGenerator) nodeContext.getKeyPairGenerator(message.getAlgorithm());

            nodeContext.execute(
                    new StoreShareTask(generator, sssMessage.getID(), sssMessage.getSecretShareMessage()));

            return new MessageReply(MessageReply.Type.OKAY);
        default:
            return new MessageReply(MessageReply.Type.ERROR,
                    new DERUTF8String("Unknown command in NodeKeyGenerationService."));
        }
    } catch (Exception e) {
        nodeContext.getEventNotifier().notify(EventNotifier.Level.ERROR,
                "NodeKeyGenerationService failure: " + e.getMessage(), e);

        return new MessageReply(MessageReply.Type.ERROR,
                new DERUTF8String("NodeKeyGenerationService failure: " + e.getMessage()));
    }

}

---