Example usage for org.bouncycastle.jce.interfaces ECPrivateKey getD

Introduction

In this page you can find the example usage for org.bouncycastle.jce.interfaces ECPrivateKey getD.

Prototype

public BigInteger getD();

Source Link

Document

return the private value D.

Usage

From source file:org.gluu.com.ox_push2.u2f.v2.cert.KeyPairGeneratorImpl.java

License:MIT License

public String keyPairToJson(KeyPair keyPair) throws U2FException {
    ECPrivateKey privateKey = (ECPrivateKey) keyPair.getPrivate();
    ECPublicKey publicKey = (ECPublicKey) keyPair.getPublic();

    BigInteger x = publicKey.getQ().getAffineXCoord().toBigInteger();
    BigInteger y = publicKey.getQ().getAffineYCoord().toBigInteger();
    BigInteger d = privateKey.getD();

    try {/*from  w  w  w . j a  v a2  s  .  co m*/
        JSONObject jsonPrivateKey = new JSONObject();
        jsonPrivateKey.put("d", Utils.encodeHexString(d.toByteArray()));

        JSONObject jsonPublicKey = new JSONObject();
        jsonPublicKey.put("x", Utils.encodeHexString(x.toByteArray()));
        jsonPublicKey.put("y", Utils.encodeHexString(y.toByteArray()));

        JSONObject jsonKeyPair = new JSONObject();
        jsonKeyPair.put("privateKey", jsonPrivateKey);
        jsonKeyPair.put("publicKey", jsonPublicKey);

        String keyPairJson = jsonKeyPair.toString();

        if (BuildConfig.DEBUG)
            Log.d(TAG, "JSON key pair: " + keyPairJson);

        return keyPairJson;
    } catch (JSONException ex) {
        throw new U2FException("Failed to serialize key pair to JSON", ex);
    }
}

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