本文整理汇总了Java中javax.crypto.Cipher.UNWRAP_MODE属性的典型用法代码示例。如果您正苦于以下问题：Java Cipher.UNWRAP_MODE属性的具体用法？Java Cipher.UNWRAP_MODE怎么用？Java Cipher.UNWRAP_MODE使用的例子？那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类javax.crypto.Cipher的用法示例。
在下文中一共展示了Cipher.UNWRAP_MODE属性的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: engineGetOutputSize
public int engineGetOutputSize(int inputLen)
{
int len1, len2, len3;
len1 = engine.getMac().getMacSize();
if (key != null)
{
len2 = 1 + 2 * (((ECKey)key).getParameters().getCurve().getFieldSize() + 7) / 8;
}
else
{
throw new IllegalStateException("cipher not initialised");
}
if (engine.getCipher() == null)
{
len3 = inputLen;
}
else if (state == Cipher.ENCRYPT_MODE || state == Cipher.WRAP_MODE)
{
len3 = engine.getCipher().getOutputSize(inputLen);
}
else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE)
{
len3 = engine.getCipher().getOutputSize(inputLen - len1 - len2);
}
else
{
throw new IllegalStateException("cipher not initialised");
}
if (state == Cipher.ENCRYPT_MODE || state == Cipher.WRAP_MODE)
{
return buffer.size() + len1 + len2 + len3;
}
else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE)
{
return buffer.size() - len1 - len2 + len3;
}
else
{
throw new IllegalStateException("cipher not initialised");
}
}
示例2: engineGetOutputSize
protected int engineGetOutputSize(
int inputLen)
{
if (state == Cipher.ENCRYPT_MODE || state == Cipher.WRAP_MODE)
{
return buffer.size() + inputLen + 20; /* SHA1 MAC size */
}
else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE)
{
return buffer.size() + inputLen - 20;
}
else
{
throw new IllegalStateException("cipher not initialised");
}
}
示例3: engineGetOutputSize
protected int engineGetOutputSize(
int inputLen)
{
if (state == Cipher.ENCRYPT_MODE || state == Cipher.WRAP_MODE)
{
return buffer.size() + inputLen + 20; /* SHA1 MAC size */
}
else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE)
{
return buffer.size() + inputLen - 20;
}
else
{
throw new IllegalStateException("cipher not initialised");
}
}
示例4: engineGetOutputSize
public int engineGetOutputSize(int inputLen)
{
int len1, len2, len3;
len1 = engine.getMac().getMacSize();
if (key != null)
{
len2 = ((DHKey)key).getParams().getP().bitLength() / 8 + 1;
}
else
{
throw new IllegalStateException("cipher not initialised");
}
if (engine.getCipher() == null)
{
len3 = inputLen;
}
else if (state == Cipher.ENCRYPT_MODE || state == Cipher.WRAP_MODE)
{
len3 = engine.getCipher().getOutputSize(inputLen);
}
else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE)
{
len3 = engine.getCipher().getOutputSize(inputLen - len1 - len2);
}
else
{
throw new IllegalStateException("cipher not initialised");
}
if (state == Cipher.ENCRYPT_MODE || state == Cipher.WRAP_MODE)
{
return buffer.size() + len1 + len2 + len3;
}
else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE)
{
return buffer.size() - len1 - len2 + len3;
}
else
{
throw new IllegalStateException("IESCipher not initialised");
}
}
示例5: engineInit
public void engineInit(
int opmode,
Key key,
AlgorithmParameterSpec params,
SecureRandom random)
throws InvalidKeyException, InvalidAlgorithmParameterException
{
if (!(key instanceof IESKey))
{
throw new InvalidKeyException("must be passed IE key");
}
if (params == null && (opmode == Cipher.ENCRYPT_MODE || opmode == Cipher.WRAP_MODE))
{
//
// if nothing is specified we set up for a 128 bit mac, with
// 128 bit derivation vectors.
//
byte[] d = new byte[16];
byte[] e = new byte[16];
if (random == null)
{
random = new SecureRandom();
}
random.nextBytes(d);
random.nextBytes(e);
params = new IESParameterSpec(d, e, 128);
}
else if (!(params instanceof IESParameterSpec))
{
throw new InvalidAlgorithmParameterException("must be passed IES parameters");
}
IESKey ieKey = (IESKey)key;
CipherParameters pubKey;
CipherParameters privKey;
if (ieKey.getPublic() instanceof JCEECPublicKey)
{
pubKey = ECUtil.generatePublicKeyParameter(ieKey.getPublic());
privKey = ECUtil.generatePrivateKeyParameter(ieKey.getPrivate());
}
else
{
pubKey = DHUtil.generatePublicKeyParameter(ieKey.getPublic());
privKey = DHUtil.generatePrivateKeyParameter(ieKey.getPrivate());
}
this.engineParams = (IESParameterSpec)params;
IESParameters p = new IESParameters(engineParams.getDerivationV(), engineParams.getEncodingV(), engineParams.getMacKeySize());
this.state = opmode;
buffer.reset();
switch (opmode)
{
case Cipher.ENCRYPT_MODE:
case Cipher.WRAP_MODE:
cipher.init(true, privKey, pubKey, p);
break;
case Cipher.DECRYPT_MODE:
case Cipher.UNWRAP_MODE:
cipher.init(false, privKey, pubKey, p);
break;
default:
System.out.println("eeek!");
}
}