import org.bouncycastle.crypto.BufferedAsymmetricBlockCipher; //导入依赖的package包/类
private Cipher createCipherForAsymmetricBlockCipherMode(final String transformation, final AsymmetricBlockCipher modeWithEngine, final String engineName, final String modeName, final String paddingName)
throws NoSuchPaddingException
{
	AsymmetricBlockCipher padding;
	if (paddingName.isEmpty() || "NOPADDING".equals(paddingName))
		padding = modeWithEngine;
	else {
		padding = createAsymmetricBlockCipherPadding(paddingName, modeWithEngine);
		if (padding == null)
			throw new NoSuchPaddingException("There is no asymmetric-block-cipher-padding registered with name \"" + paddingName + "\"!");
	}

	return new AsymmetricBlockCipherImpl(
			transformation,
			new BufferedAsymmetricBlockCipher(padding)
	);
}
 

import org.bouncycastle.crypto.BufferedAsymmetricBlockCipher; //导入依赖的package包/类
private void initFromSpec(
    OAEPParameterSpec pSpec) 
    throws NoSuchPaddingException
{
    MGF1ParameterSpec   mgfParams = (MGF1ParameterSpec)pSpec.getMGFParameters();
    Digest              digest = DigestFactory.getDigest(mgfParams.getDigestAlgorithm());
    
    if (digest == null)
    {
        throw new NoSuchPaddingException("no match on OAEP constructor for digest algorithm: "+ mgfParams.getDigestAlgorithm());
    }

    cipher = new BufferedAsymmetricBlockCipher(new OAEPEncoding(new ElGamalEngine(), digest, ((PSource.PSpecified)pSpec.getPSource()).getValue()));        
    paramSpec = pSpec;
}
 

import org.bouncycastle.crypto.BufferedAsymmetricBlockCipher; //导入依赖的package包/类
public CipherSpi(
    AsymmetricBlockCipher engine)
{
    cipher = new BufferedAsymmetricBlockCipher(engine);
}
 

import org.bouncycastle.crypto.BufferedAsymmetricBlockCipher; //导入依赖的package包/类
public AsymmetricBlockCipherImpl(final String transformation, final BufferedAsymmetricBlockCipher delegate) {
	super(transformation);
	this.delegate = delegate;
}