Examples of org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher

Package org.bouncycastle.crypto.paddings

Examples of org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher

org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher
A wrapper class that allows block ciphers to be used to process data in a piecemeal fashion with padding. The PaddedBufferedBlockCipher outputs a block only when the buffer is full and more data is being added, or on a doFinal (unless the current block in the buffer is a pad block). The default padding mechanism used is the one outlined in PKCS5/PKCS7.

        modeName = Strings.toUpperCase(mode);


        if (modeName.equals("ECB"))
        {
            ivLength = 0;
            cipher = new PaddedBufferedBlockCipher(baseEngine);
        }
        else if (modeName.equals("CBC"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new PaddedBufferedBlockCipher(
                            new CBCBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("OFB"))
        {
            ivLength = baseEngine.getBlockSize();
            if (modeName.length() != 3)
            {
                int wordSize = Integer.parseInt(modeName.substring(3));


                cipher = new PaddedBufferedBlockCipher(
                                new OFBBlockCipher(baseEngine, wordSize));
            }
            else
            {
                cipher = new PaddedBufferedBlockCipher(
                        new OFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
            }
        }
        else if (modeName.startsWith("CFB"))
        {
            ivLength = baseEngine.getBlockSize();
            if (modeName.length() != 3)
            {
                int wordSize = Integer.parseInt(modeName.substring(3));


                cipher = new PaddedBufferedBlockCipher(
                                new CFBBlockCipher(baseEngine, wordSize));
            }
            else
            {
                cipher = new PaddedBufferedBlockCipher(
                        new CFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
            }
        }
        else if (modeName.startsWith("PGP"))
        {
            if (modeName.equalsIgnoreCase("PGPCFBwithIV"))
            {
                ivLength = baseEngine.getBlockSize();
                cipher = new PaddedBufferedBlockCipher(
                    new PGPCFBBlockCipher(baseEngine, true));
            }
            else
            {
                ivLength = baseEngine.getBlockSize();
                cipher = new PaddedBufferedBlockCipher(
                    new PGPCFBBlockCipher(baseEngine, false));
            }
        }
        else if (modeName.equalsIgnoreCase("OpenPGPCFB"))
        {
            ivLength = 0;
            cipher = new PaddedBufferedBlockCipher(
                new OpenPGPCFBBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("SIC"))
        {
            ivLength = baseEngine.getBlockSize();

View Full Code Here

                cipher = new BufferedBlockCipher(cipher.getUnderlyingCipher());
            }
        }
        else if (paddingName.equals("PKCS5PADDING") || paddingName.equals("PKCS7PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher());
        }
        else if (paddingName.equals("ZEROBYTEPADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher(), new ZeroBytePadding());
        }
        else if (paddingName.equals("ISO10126PADDING") || paddingName.equals("ISO10126-2PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher(), new ISO10126d2Padding());
        }
        else if (paddingName.equals("X9.23PADDING") || paddingName.equals("X923PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher(), new X923Padding());
        }
        else if (paddingName.equals("ISO7816-4PADDING") || paddingName.equals("ISO9797-1PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher(), new ISO7816d4Padding());
        }
        else if (paddingName.equals("TBCPADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher(), new TBCPadding());
        }
        else if (paddingName.equals("WITHCTS"))
        {
            padded = false;
            cipher = new CTSBlockCipher(cipher.getUnderlyingCipher());

View Full Code Here

        BufferedBlockCipher cipher;
        if (scheme.getAlgorithm().equals(PKCSObjectIdentifiers.RC2_CBC)) {
            RC2CBCParameter rc2Params = new RC2CBCParameter((ASN1Sequence) scheme.getObject());
            byte[] iv = rc2Params.getIV();
            CipherParameters param = new ParametersWithIV(cipherParams, iv);
            cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new RC2Engine()));
            cipher.init(false, param);
        } else {
            byte[] iv = ((ASN1OctetString) scheme.getObject()).getOctets();
            CipherParameters param = new ParametersWithIV(cipherParams, iv);
            cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
            cipher.init(false, param);
        }


        byte[] data = eIn.getEncryptedData();
        byte[] out = new byte[cipher.getOutputSize(data.length)];

View Full Code Here

        public IESwithDESede()
        {
            super(new IESEngine(new DHBasicAgreement(),
                new KDF2BytesGenerator(new SHA1Digest()),
                new HMac(new SHA1Digest()),
                new PaddedBufferedBlockCipher(new DESedeEngine())));
        }

View Full Code Here

        public IESwithAES()
        {
            super(new IESEngine(new DHBasicAgreement(),
                new KDF2BytesGenerator(new SHA1Digest()),
                new HMac(new SHA1Digest()),
                new PaddedBufferedBlockCipher(new AESEngine())));
        }

View Full Code Here

    }


    private BufferedBlockCipher getCipher() {
        if (cipher == null) {
            BlockCipher engine = new DESedeEngine();
            cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(engine));


            String name = cipher.getUnderlyingCipher().getAlgorithmName();
//            System.out.println("Using " + name);
        }
        return cipher;

View Full Code Here

    
    /** Creates a new instance of AESCipher */
    public AESCipher(boolean forEncryption, byte[] key, byte[] iv) {
        BlockCipher aes = new AESFastEngine();
        BlockCipher cbc = new CBCBlockCipher(aes);
        bp = new PaddedBufferedBlockCipher(cbc);
        KeyParameter kp = new KeyParameter(key);
        ParametersWithIV piv = new ParametersWithIV(kp, iv);
        bp.init(forEncryption, piv);
    }

View Full Code Here

            boolean forEncryption) throws InvalidKeyException,
            IllegalBlockSizeException, BadPaddingException {
        IESCipher cipher = new IESCipher(new IESEngine(
                new ECDHBasicAgreement(), new KDF2BytesGenerator(
                        new SHA1Digest()), new HMac(new SHA256Digest()),
                new PaddedBufferedBlockCipher(new CBCBlockCipher(
                        new AESEngine()))));


        cipher.engineInit(forEncryption ? Cipher.ENCRYPT_MODE
                : Cipher.DECRYPT_MODE, recipient, new SecureRandom());
        return cipher.engineDoFinal(input, 0, input.length);

View Full Code Here


    // h/t Steve Weis, Michael Rogers, and liberationtech
    private static byte[] _cryptBytesAES(byte[] input, byte[] key,
            boolean forEncryption) throws InvalidCipherTextException {
        assert key.length == 32; // 32 bytes == 256 bits
        return process(input, new PaddedBufferedBlockCipher(new CBCBlockCipher(
                new AESEngine())), new KeyParameter(key), forEncryption);
        // note: using zero IV because we generate a new key for every message
    }

View Full Code Here

    
    /** Creates a new instance of AESCipher */
    public AESCipher(boolean forEncryption, byte[] key, byte[] iv) {
        BlockCipher aes = new AESFastEngine();
        BlockCipher cbc = new CBCBlockCipher(aes);
        bp = new PaddedBufferedBlockCipher(cbc);
        KeyParameter kp = new KeyParameter(key);
        ParametersWithIV piv = new ParametersWithIV(kp, iv);
        bp.init(forEncryption, piv);
    }

View Full Code Here

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