コード例 #1
0
  private void initFromKey(Key key) throws InvalidKeyException {
    // BEGIN android-removed
    // if (agreement instanceof ECMQVBasicAgreement)
    // {
    //     if (!(key instanceof MQVPrivateKey))
    //     {
    //         throw new InvalidKeyException(kaAlgorithm + " key agreement requires "
    //             + getSimpleName(MQVPrivateKey.class) + " for initialisation");
    //     }
    //
    //     MQVPrivateKey mqvPrivKey = (MQVPrivateKey)key;
    //     ECPrivateKeyParameters staticPrivKey = (ECPrivateKeyParameters)
    //         ECUtil.generatePrivateKeyParameter(mqvPrivKey.getStaticPrivateKey());
    //     ECPrivateKeyParameters ephemPrivKey = (ECPrivateKeyParameters)
    //         ECUtil.generatePrivateKeyParameter(mqvPrivKey.getEphemeralPrivateKey());
    //
    //     ECPublicKeyParameters ephemPubKey = null;
    //     if (mqvPrivKey.getEphemeralPublicKey() != null)
    //     {
    //         ephemPubKey = (ECPublicKeyParameters)
    //             ECUtil.generatePublicKeyParameter(mqvPrivKey.getEphemeralPublicKey());
    //     }
    //
    //     MQVPrivateParameters localParams = new MQVPrivateParameters(staticPrivKey, ephemPrivKey,
    // ephemPubKey);
    //     this.parameters = staticPrivKey.getParameters();
    //
    //     // TODO Validate that all the keys are using the same parameters?
    //
    //     agreement.init(localParams);
    // }
    // else
    // END android-removed
    {
      if (!(key instanceof PrivateKey)) {
        throw new InvalidKeyException(
            kaAlgorithm
                + " key agreement requires "
                + getSimpleName(ECPrivateKey.class)
                + " for initialisation");
      }

      ECPrivateKeyParameters privKey =
          (ECPrivateKeyParameters) ECUtil.generatePrivateKeyParameter((PrivateKey) key);
      this.parameters = privKey.getParameters();

      agreement.init(privKey);
    }
  }
コード例 #2
0
ファイル: Address.java プロジェクト: gitonio/btcJ
  public static byte[] privateKeyToPublicKey(String private_key, boolean compressed) {
    byte[] privateKeyBytes = null;

    try {
      privateKeyBytes = org.apache.commons.codec.binary.Hex.decodeHex(private_key.toCharArray());
    } catch (DecoderException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    }

    X9ECParameters ecp = SECNamedCurves.getByName("secp256k1");
    ECDomainParameters domainParams =
        new ECDomainParameters(ecp.getCurve(), ecp.getG(), ecp.getN(), ecp.getH(), ecp.getSeed());

    ECPrivateKeyParameters privateKey =
        new ECPrivateKeyParameters(new BigInteger(1, privateKeyBytes), domainParams);
    System.out.println(privateKey.getD());
    byte[] publicKeyBIBytes = privateKey.getD().toByteArray();
    ECPoint Q = domainParams.getG().multiply(new BigInteger(publicKeyBIBytes));

    byte[] publicKeyBytes = Q.getEncoded(compressed);
    return publicKeyBytes;
  }