org.spongycastle.math.ec.ECCurve.getFieldSize()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中org.spongycastle.math.ec.ECCurve.getFieldSize()方法的一些代码示例，展示了ECCurve.getFieldSize()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ECCurve.getFieldSize()方法的具体详情如下：
包路径：org.spongycastle.math.ec.ECCurve
类名称：ECCurve
方法名：getFieldSize

ECCurve.getFieldSize介绍

暂无

代码示例

代码示例来源：origin: ethereum/ethereumj

public static byte[] decrypt(BigInteger privKey, byte[] cipher, byte[] macData) throws IOException, InvalidCipherTextException {
  byte[] plaintext;
  ByteArrayInputStream is = new ByteArrayInputStream(cipher);
  byte[] ephemBytes = new byte[2*((CURVE.getCurve().getFieldSize()+7)/8) + 1];
  is.read(ephemBytes);
  ECPoint ephem = CURVE.getCurve().decodePoint(ephemBytes);
  byte[] IV = new byte[KEY_SIZE /8];
  is.read(IV);
  byte[] cipherBody = new byte[is.available()];
  is.read(cipherBody);
  plaintext = decrypt(ephem, privKey, IV, cipherBody, macData);
  return plaintext;
}

代码示例来源：origin: ethereum/ethereumj

public static byte[] decrypt(BigInteger prv, byte[] cipher) throws InvalidCipherTextException, IOException {
  ByteArrayInputStream is = new ByteArrayInputStream(cipher);
  byte[] ephemBytes = new byte[2*((curve.getCurve().getFieldSize()+7)/8) + 1];
  is.read(ephemBytes);
  ECPoint ephem = curve.getCurve().decodePoint(ephemBytes);
  byte[] IV = new byte[KEY_SIZE /8];
  is.read(IV);
  byte[] cipherBody = new byte[is.available()];
  is.read(cipherBody);
  EthereumIESEngine iesEngine = makeIESEngine(false, ephem, prv, IV);
  byte[] message = iesEngine.processBlock(cipherBody, 0, cipherBody.length);
  return message;
}

代码示例来源：origin: com.madgag.spongycastle/core

/**
 * Return the curve's field size in bytes.
 *
 * @param c the curve of interest.
 * @return the field size in bytes (rounded up).
 */
public int getByteLength(
  ECCurve c)
{
  return (c.getFieldSize() + 7) / 8;
}

代码示例来源：origin: com.madgag/sc-light-jdk15on

public int getByteLength(
  ECCurve c)
{
  return (c.getFieldSize() + 7) / 8;
}

代码示例来源：origin: com.madgag.spongycastle/core

public static int getCombSize(ECCurve c)
{
  BigInteger order = c.getOrder();
  return order == null ? c.getFieldSize() + 1 : order.bitLength(); 
}

代码示例来源：origin: com.madgag.spongycastle/core

public int getSeedLen()
{
  return p.getCurve().getFieldSize();
}

代码示例来源：origin: com.madgag.spongycastle/prov

public int engineGetKeySize(Key key)
{
  if (key instanceof ECKey)
  {
    return ((ECKey)key).getParameters().getCurve().getFieldSize();
  }
  else
  {
    throw new IllegalArgumentException("not an EC key");
  }
}

代码示例来源：origin: com.madgag.spongycastle/core

public int getMaxOutlen()
{
  return ((p.getCurve().getFieldSize() - (13 + log2(cofactor))) / 8) * 8;
}

代码示例来源：origin: com.madgag.spongycastle/core

public int getFieldSize()
{
  return (key.getParameters().getCurve().getFieldSize() + 7) / 8;
}

代码示例来源：origin: com.madgag.spongycastle/core

public int getFieldSize()
{
  return (key.getParameters().getCurve().getFieldSize() + 7) / 8;
}

代码示例来源：origin: com.madgag.spongycastle/core

public int getFieldSize()
{
  return (key.getParameters().getCurve().getFieldSize() + 7) / 8;
}

代码示例来源：origin: com.madgag.spongycastle/core

public int getFieldSize()
{
  return (staticKey.getParameters().getCurve().getFieldSize() + 7) / 8;
}

代码示例来源：origin: com.madgag.spongycastle/core

private static ECFieldElement hash2FieldElement(ECCurve curve, byte[] hash)
{
  byte[] data = Arrays.reverse(hash);
  return curve.fromBigInteger(truncate(new BigInteger(1, data), curve.getFieldSize()));
}

代码示例来源：origin: biheBlockChain/wkcwallet-java

public static byte[] decrypt(BigInteger privKey, byte[] cipher, byte[] macData) throws IOException, InvalidCipherTextException {
  byte[] plaintext;
  ByteArrayInputStream is = new ByteArrayInputStream(cipher);
  byte[] ephemBytes = new byte[2*((CURVE.getCurve().getFieldSize()+7)/8) + 1];
  is.read(ephemBytes);
  ECPoint ephem = CURVE.getCurve().decodePoint(ephemBytes);
  byte[] IV = new byte[KEY_SIZE /8];
  is.read(IV);
  byte[] cipherBody = new byte[is.available()];
  is.read(cipherBody);
  plaintext = decrypt(ephem, privKey, IV, cipherBody, macData);
  return plaintext;
}

代码示例来源：origin: yggdrash/yggdrash

public static byte[] decrypt(BigInteger privKey, byte[] cipher, byte[] macData) throws IOException, InvalidCipherTextException {
  byte[] plaintext;
  ByteArrayInputStream is = new ByteArrayInputStream(cipher);
  byte[] ephemBytes = new byte[2 * ((CURVE.getCurve().getFieldSize() + 7) / 8) + 1];
  is.read(ephemBytes);
  ECPoint ephem = CURVE.getCurve().decodePoint(ephemBytes);
  byte[] IV = new byte[KEY_SIZE / 8];
  is.read(IV);
  byte[] cipherBody = new byte[is.available()];
  is.read(cipherBody);
  plaintext = decrypt(ephem, privKey, IV, cipherBody, macData);
  return plaintext;
}

代码示例来源：origin: com.madgag.spongycastle/core

V = new byte[1 + (ecParams.getCurve().getFieldSize()+7)/8];
  break;
case 0x06: // hybrid
case 0x07: // Byte length calculated as in ECPoint.getEncoded();
  V = new byte[1 + 2*((ecParams.getCurve().getFieldSize()+7)/8)];
  break;

代码示例来源：origin: com.madgag.spongycastle/core

public int getFieldSize()
{
  return (privParams.getStaticPrivateKey().getParameters().getCurve().getFieldSize() + 7) / 8;
}

代码示例来源：origin: yggdrash/yggdrash

private static byte[] decrypt(BigInteger prv, byte[] cipher) throws InvalidCipherTextException, IOException {
  ByteArrayInputStream is = new ByteArrayInputStream(cipher);
  byte[] ephemBytes = new byte[2 * ((curve.getCurve().getFieldSize() + 7) / 8) + 1];
  is.read(ephemBytes);
  ECPoint ephem = curve.getCurve().decodePoint(ephemBytes);
  byte[] IV = new byte[KEY_SIZE / 8];
  is.read(IV);
  byte[] cipherBody = new byte[is.available()];
  is.read(cipherBody);
  EthereumIESEngine iesEngine = makeIESEngine(false, ephem, prv, IV);
  return iesEngine.processBlock(cipherBody, 0, cipherBody.length);
}

代码示例来源：origin: com.madgag.spongycastle/core

public void init(
  CipherParameters privParam)
{
  SM2KeyExchangePrivateParameters baseParam;
  if (privParam instanceof ParametersWithID)
  {
    baseParam = (SM2KeyExchangePrivateParameters)((ParametersWithID)privParam).getParameters();
    userID = ((ParametersWithID)privParam).getID();
  }
  else
  {
    baseParam = (SM2KeyExchangePrivateParameters)privParam;
    userID = new byte[0];
  }
  initiator = baseParam.isInitiator();
  staticKey = baseParam.getStaticPrivateKey();
  ephemeralKey = baseParam.getEphemeralPrivateKey();
  ecParams = staticKey.getParameters();
  staticPubPoint = baseParam.getStaticPublicPoint();
  ephemeralPubPoint = baseParam.getEphemeralPublicPoint();
  curveLength = (ecParams.getCurve().getFieldSize() + 7) / 8;
  w = ecParams.getCurve().getFieldSize() / 2 - 1;
}

代码示例来源：origin: com.madgag.spongycastle/core

public void init(boolean forEncryption, CipherParameters param)
{
  this.forEncryption = forEncryption;
  if (forEncryption)
  {
    ParametersWithRandom rParam = (ParametersWithRandom)param;
    ecKey = (ECKeyParameters)rParam.getParameters();
    ecParams = ecKey.getParameters();
    ECPoint s = ((ECPublicKeyParameters)ecKey).getQ().multiply(ecParams.getH());
    if (s.isInfinity())
    {
      throw new IllegalArgumentException("invalid key: [h]Q at infinity");
    }
    random = rParam.getRandom();
  }
  else
  {
    ecKey = (ECKeyParameters)param;
    ecParams = ecKey.getParameters();
  }
  curveLength = (ecParams.getCurve().getFieldSize() + 7) / 8;
}

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