brokenjceblockcipher.java

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        {
        case Cipher.ENCRYPT_MODE:
        case Cipher.WRAP_MODE:
            cipher.init(true, param);
            break;
        case Cipher.DECRYPT_MODE:
        case Cipher.UNWRAP_MODE:
            cipher.init(false, param);
            break;
        default:
            System.out.println("eeek!");
        }
    }

    protected void engineInit(
        int                 opmode,
        Key                 key,
        AlgorithmParameters params,
        SecureRandom        random) 
    throws InvalidKeyException, InvalidAlgorithmParameterException
    {
        AlgorithmParameterSpec  paramSpec = null;

        if (params != null)
        {
            for (int i = 0; i != availableSpecs.length; i++)
            {
                try
                {
                    paramSpec = params.getParameterSpec(availableSpecs[i]);
                    break;
                }
                catch (Exception e)
                {
                    continue;
                }
            }

            if (paramSpec == null)
            {
                throw new InvalidAlgorithmParameterException("can't handle parameter " + params.toString());
            }
        }

        engineParams = params;
        engineInit(opmode, key, paramSpec, random);
    }

    protected void engineInit(
        int                 opmode,
        Key                 key,
        SecureRandom        random) 
        throws InvalidKeyException
    {
        try
        {
            engineInit(opmode, key, (AlgorithmParameterSpec)null, random);
        }
        catch (InvalidAlgorithmParameterException e)
        {
            throw new IllegalArgumentException(e.getMessage());
        }
    }

    protected byte[] engineUpdate(
        byte[]  input,
        int     inputOffset,
        int     inputLen) 
    {
        int     length = cipher.getUpdateOutputSize(inputLen);

        if (length > 0)
        {
                byte[]  out = new byte[length];

                cipher.processBytes(input, inputOffset, inputLen, out, 0);
                return out;
        }

        cipher.processBytes(input, inputOffset, inputLen, null, 0);

        return null;
    }

    protected int engineUpdate(
        byte[]  input,
        int     inputOffset,
        int     inputLen,
        byte[]  output,
        int     outputOffset) 
    {
        return cipher.processBytes(input, inputOffset, inputLen, output, outputOffset);
    }

    protected byte[] engineDoFinal(
        byte[]  input,
        int     inputOffset,
        int     inputLen) 
        throws IllegalBlockSizeException, BadPaddingException
    {
        int     len = 0;
        byte[]  tmp = new byte[engineGetOutputSize(inputLen)];

        if (inputLen != 0)
        {
            len = cipher.processBytes(input, inputOffset, inputLen, tmp, 0);
        }

        try
        {
            len += cipher.doFinal(tmp, len);
        }
        catch (DataLengthException e)
        {
            throw new IllegalBlockSizeException(e.getMessage());
        }
        catch (InvalidCipherTextException e)
        {
            throw new BadPaddingException(e.getMessage());
        }

        byte[]  out = new byte[len];

        System.arraycopy(tmp, 0, out, 0, len);

        return out;
    }

    protected int engineDoFinal(
        byte[]  input,
        int     inputOffset,
        int     inputLen,
        byte[]  output,
        int     outputOffset) 
        throws IllegalBlockSizeException, BadPaddingException
    {
        int     len = 0;

        if (inputLen != 0)
        {
                len = cipher.processBytes(input, inputOffset, inputLen, output, outputOffset);
        }

        try
        {
            return len + cipher.doFinal(output, outputOffset + len);
        }
        catch (DataLengthException e)
        {
            throw new IllegalBlockSizeException(e.getMessage());
        }
        catch (InvalidCipherTextException e)
        {
            throw new BadPaddingException(e.getMessage());
        }
    }

    protected byte[] engineWrap(
        Key     key) 
    throws IllegalBlockSizeException, java.security.InvalidKeyException
    {
        byte[] encoded = key.getEncoded();
        if (encoded == null)
        {
            throw new InvalidKeyException("Cannot wrap key, null encoding.");
        }

        try
        {
            return engineDoFinal(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 = null;
        try
        {
            encoded = engineDoFinal(wrappedKey, 0, wrappedKey.length);
        }
        catch (BadPaddingException e)
        {
            throw new InvalidKeyException(e.getMessage());
        }
        catch (IllegalBlockSizeException e2)
        {
            throw new InvalidKeyException(e2.getMessage());
        }

        if (wrappedKeyType == Cipher.SECRET_KEY)
        {
            return new SecretKeySpec(encoded, wrappedKeyAlgorithm);
        }
        else
        {
            try
            {
                KeyFactory kf = KeyFactory.getInstance(wrappedKeyAlgorithm, "BC");

                if (wrappedKeyType == Cipher.PUBLIC_KEY)
                {
                    return kf.generatePublic(new X509EncodedKeySpec(encoded));
                }
                else if (wrappedKeyType == Cipher.PRIVATE_KEY)
                {
                    return kf.generatePrivate(new PKCS8EncodedKeySpec(encoded));
                }
            }
            catch (NoSuchProviderException e)
            {
                throw new InvalidKeyException("Unknown key type " + e.getMessage());
            }
            catch (NoSuchAlgorithmException e)
            {
                throw new InvalidKeyException("Unknown key type " + e.getMessage());
            }
            catch (InvalidKeySpecException e2)
            {
                throw new InvalidKeyException("Unknown key type " + e2.getMessage());
            }

            throw new InvalidKeyException("Unknown key type " + wrappedKeyType);
        }
    }

    /*
     * The ciphers that inherit from us.
     */

    /**
     * PBEWithMD5AndDES
     */
    static public class BrokePBEWithMD5AndDES
        extends BrokenJCEBlockCipher
    {
        public BrokePBEWithMD5AndDES()
        {
            super(new CBCBlockCipher(new DESEngine()), PKCS5S1, MD5, 64, 64);
        }
    }

    /**
     * PBEWithSHA1AndDES
     */
    static public class BrokePBEWithSHA1AndDES
        extends BrokenJCEBlockCipher
    {
        public BrokePBEWithSHA1AndDES()
        {
            super(new CBCBlockCipher(new DESEngine()), PKCS5S1, SHA1, 64, 64);
        }
    }

    /**
     * PBEWithSHAAnd3-KeyTripleDES-CBC
     */
    static public class BrokePBEWithSHAAndDES3Key
        extends BrokenJCEBlockCipher
    {
        public BrokePBEWithSHAAndDES3Key()
        {
            super(new CBCBlockCipher(new DESedeEngine()), PKCS12, SHA1, 192, 64);
        }
    }

    /**
     * OldPBEWithSHAAnd3-KeyTripleDES-CBC
     */
    static public class OldPBEWithSHAAndDES3Key
        extends BrokenJCEBlockCipher
    {
        public OldPBEWithSHAAndDES3Key()
        {
            super(new CBCBlockCipher(new DESedeEngine()), OLD_PKCS12, SHA1, 192, 64);
        }
    }

    /**
     * PBEWithSHAAnd2-KeyTripleDES-CBC
     */
    static public class BrokePBEWithSHAAndDES2Key
        extends BrokenJCEBlockCipher
    {
        public BrokePBEWithSHAAndDES2Key()
        {
            super(new CBCBlockCipher(new DESedeEngine()), PKCS12, SHA1, 128, 64);
        }
    }

    /**
     * OldPBEWithSHAAndTwofish-CBC
     */
    static public class OldPBEWithSHAAndTwofish
        extends BrokenJCEBlockCipher
    {
        public OldPBEWithSHAAndTwofish()
        {
            super(new CBCBlockCipher(new TwofishEngine()), OLD_PKCS12, SHA1, 256, 128);
        }
    }
}