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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
package org.bouncycastle.jcajce.provider.asymmetric.util;
import java.io.ByteArrayOutputStream;
import java.security.AlgorithmParameters;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.CipherSpi;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEParameterSpec;
import javax.crypto.spec.RC2ParameterSpec;
import javax.crypto.spec.RC5ParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.Wrapper;
import org.bouncycastle.jcajce.util.BCJcaJceHelper;
import org.bouncycastle.jcajce.util.JcaJceHelper;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.Arrays;
public abstract class BaseCipherSpi
extends CipherSpi
{
//
// specs we can handle.
//
private Class[] availableSpecs =
{
IvParameterSpec.class,
PBEParameterSpec.class,
RC2ParameterSpec.class,
RC5ParameterSpec.class
};
private final JcaJceHelper helper = new BCJcaJceHelper();
protected AlgorithmParameters engineParams = null;
protected Wrapper wrapEngine = null;
private int ivSize;
private byte[] iv;
protected BaseCipherSpi()
{
}
protected int engineGetBlockSize()
{
return 0;
}
protected byte[] engineGetIV()
{
return null;
}
protected int engineGetKeySize(
Key key)
{
return key.getEncoded().length;
}
protected int engineGetOutputSize(
int inputLen)
{
return -1;
}
protected AlgorithmParameters engineGetParameters()
{
return null;
}
protected final AlgorithmParameters createParametersInstance(String algorithm)
throws NoSuchAlgorithmException, NoSuchProviderException
{
return helper.createAlgorithmParameters(algorithm);
}
protected void engineSetMode(
String mode)
throws NoSuchAlgorithmException
{
throw new NoSuchAlgorithmException("can't support mode " + mode);
}
protected void engineSetPadding(
String padding)
throws NoSuchPaddingException
{
throw new NoSuchPaddingException("Padding " + padding + " unknown.");
}
protected byte[] engineWrap(
Key key)
throws IllegalBlockSizeException, InvalidKeyException
{
byte[] encoded = key.getEncoded();
if (encoded == null)
{
throw new InvalidKeyException("Cannot wrap key, null encoding.");
}
try
{
if (wrapEngine == null)
{
return engineDoFinal(encoded, 0, encoded.length);
}
else
{
return wrapEngine.wrap(encoded, 0, encoded.length);
}
}
catch (BadPaddingException e)
{
throw new IllegalBlockSizeException(e.getMessage());
}
}
protected Key engineUnwrap(
byte[] wrappedKey,
String wrappedKeyAlgorithm,
int wrappedKeyType)
throws InvalidKeyException
{
byte[] encoded;
try
{
if (wrapEngine == null)
{
encoded = engineDoFinal(wrappedKey, 0, wrappedKey.length);
}
else
{
encoded = wrapEngine.unwrap(wrappedKey, 0, wrappedKey.length);
}
}
catch (InvalidCipherTextException e)
{
throw new InvalidKeyException(e.getMessage());
}
catch (final BadPaddingException e)
{
throw new InvalidKeyException("unable to unwrap")
{
public synchronized Throwable getCause()
{
return e;
}
};
}
catch (IllegalBlockSizeException e2)
{
throw new InvalidKeyException(e2.getMessage());
}
if (wrappedKeyType == Cipher.SECRET_KEY)
{
return new SecretKeySpec(encoded, wrappedKeyAlgorithm);
}
else if (wrappedKeyAlgorithm.equals("") && wrappedKeyType == Cipher.PRIVATE_KEY)
{
/*
* The caller doesn't know the algorithm as it is part of
* the encrypted data.
*/
try
{
PrivateKeyInfo in = PrivateKeyInfo.getInstance(encoded);
PrivateKey privKey = BouncyCastleProvider.getPrivateKey(in);
if (privKey != null)
{
return privKey;
}
else
{
throw new InvalidKeyException("algorithm " + in.getPrivateKeyAlgorithm().getAlgorithm() + " not supported");
}
}
catch (Exception e)
{
throw new InvalidKeyException("Invalid key encoding.");
}
}
else
{
try
{
KeyFactory kf = helper.createKeyFactory(wrappedKeyAlgorithm);
if (wrappedKeyType == Cipher.PUBLIC_KEY)
{
return kf.generatePublic(new X509EncodedKeySpec(encoded));
}
else if (wrappedKeyType == Cipher.PRIVATE_KEY)
{
return kf.generatePrivate(new PKCS8EncodedKeySpec(encoded));
}
}
catch (NoSuchAlgorithmException e)
{
throw new InvalidKeyException("Unknown key type " + e.getMessage());
}
catch (InvalidKeySpecException e)
{
throw new InvalidKeyException("Unknown key type " + e.getMessage());
}
catch (NoSuchProviderException e)
{
throw new InvalidKeyException("Unknown key type " + e.getMessage());
}
throw new InvalidKeyException("Unknown key type " + wrappedKeyType);
}
}
protected static final class ErasableOutputStream
extends ByteArrayOutputStream
{
public ErasableOutputStream()
{
}
public byte[] getBuf()
{
return buf;
}
public void erase()
{
Arrays.fill(this.buf, (byte)0);
reset();
}
}
}