Example usage for org.bouncycastle.jce.interfaces ECPublicKey getQ

Introduction

In this page you can find the example usage for org.bouncycastle.jce.interfaces ECPublicKey getQ.

Prototype

public ECPoint getQ();

Source Link

Document

return the public point Q

Usage

From source file:com.amazonaws.encryptionsdk.internal.EncryptionHandler.java

License:Open Source License

private String serializeTrailingKeyForEc() {
    switch (cryptoAlgo_) {
    case ALG_AES_128_GCM_IV12_TAG16_HKDF_SHA256_ECDSA_P256:
    case ALG_AES_192_GCM_IV12_TAG16_HKDF_SHA384_ECDSA_P384:
    case ALG_AES_256_GCM_IV12_TAG16_HKDF_SHA384_ECDSA_P384:
        ECPublicKey ecPub = (ECPublicKey) trailingKeys_.getPublic();
        return Base64.encodeAsString(ecPub.getQ().getEncoded(true)); // Compressed format
    default://  w w w  .  j a  v  a 2 s. com
        throw new IllegalStateException("Algorithm does not support trailing signature");
    }
}

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From source file:com.cryptolib.CryptoObject.java

License:Open Source License

/**
* Performs ECDH//from   www. j  av  a 2 s . com
*/
public void createSharedEncKey(ECPublicKey key) throws CryptoSocketException {
    try {
        X9ECParameters ecP = CustomNamedCurves.getByName(curve);
        ECDomainParameters ecdp = new ECDomainParameters(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH());
        ECPublicKeyParameters ecpkp = new ECPublicKeyParameters(key.getQ(), ecdp);
        BCECPrivateKey sk = (BCECPrivateKey) this.encKeypair.getPrivate();
        ECPrivateKeyParameters ecskp = new ECPrivateKeyParameters(sk.getD(), ecdp);
        ECDHCBasicAgreement ba = new ECDHCBasicAgreement();
        ba.init(ecskp);
        byte[] byteSharedSecret = ba.calculateAgreement(ecpkp).toByteArray();
        byte[] byteSharedSecretSecond = new byte[byteSharedSecret.length / 2];
        byte[] byteSharedSecretFirst = new byte[byteSharedSecret.length / 2];
        System.arraycopy(byteSharedSecret, 0, byteSharedSecretSecond, 0, byteSharedSecretSecond.length);
        System.arraycopy(byteSharedSecret, byteSharedSecretSecond.length, byteSharedSecretFirst, 0,
                byteSharedSecretFirst.length);
        this.sharedSecretFirst = new SecretKeySpec(byteSharedSecretFirst, "AES");
        this.sharedSecretSecond = new SecretKeySpec(byteSharedSecretSecond, "AES");
        this.has_symmetric_key = true;
        this.enc = Cipher.getInstance("AES/GCM/NoPadding");
        this.dec = Cipher.getInstance("AES/GCM/NoPadding");
    } catch (IllegalStateException is) {
        throw new CryptoSocketException("unable to create shared encryption key, wrong state!");
    } catch (NoSuchAlgorithmException nsa) {
        throw new CryptoSocketException("Encryption algorithm not found!");
    } catch (NoSuchPaddingException nsp) {
        throw new CryptoSocketException("Invalid padding algorithm!");
    }
}

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From source file:com.sydefolk.crypto.zrtp.ZRTPSocket.java

License:Open Source License

private byte[] getPublicEC25Key() {
    ECPublicKey publicKey = (ECPublicKey) ec25KeyPair.getPublic();
    ECPoint q = publicKey.getQ();

    byte[] x = new byte[32];
    byte[] y = new byte[32];

    Conversions.bigIntegerToByteArray(x, q.getX().toBigInteger());
    Conversions.bigIntegerToByteArray(y, q.getY().toBigInteger());

    return Conversions.combine(x, y);
}

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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  . ja va  2s.c o 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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