Examples of BufferedBlockCipher

org.bouncycastle.crypto.BufferedBlockCipher
A wrapper class that allows block ciphers to be used to process data in a piecemeal fashion. The BufferedBlockCipher outputs a block only when the buffer is full and more data is being added, or on a doFinal.
Note: in the case where the underlying cipher is either a CFB cipher or an OFB one the last block may not be a multiple of the block size.
org.bouncycastle2.crypto.BufferedBlockCipher
A wrapper class that allows block ciphers to be used to process data in a piecemeal fashion. The BufferedBlockCipher outputs a block only when the buffer is full and more data is being added, or on a doFinal.
Note: in the case where the underlying cipher is either a CFB cipher or an OFB one the last block may not be a multiple of the block size.

Examples of org.bouncycastle.crypto.BufferedBlockCipher

    {
        String  paddingName = padding.toUpperCase();


        if (paddingName.equals("NOPADDING"))
        {
            cipher = new BufferedBlockCipher(cipher.getUnderlyingCipher());
        }
        else if (paddingName.equals("PKCS5PADDING") || paddingName.equals("PKCS7PADDING") || paddingName.equals("ISO10126PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher());
        }

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

            ivLength = baseEngine.getBlockSize();
            if (ivLength < 16)
            {
                throw new IllegalArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
            }
            cipher = new BufferedBlockCipher(
                        new SICBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("CTR"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedBlockCipher(
                        new SICBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("GOFB"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedBlockCipher(
                        new GOFBBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("CTS"))
        {
            ivLength = baseEngine.getBlockSize();

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

        {
            padded = false;
            
            if (!(cipher instanceof CTSBlockCipher))
            {
                cipher = new BufferedBlockCipher(cipher.getUnderlyingCipher());
            }
        }
        else if (paddingName.equals("PKCS5PADDING") || paddingName.equals("PKCS7PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher());

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

            ivLength = baseEngine.getBlockSize();
            if (ivLength < 16)
            {
                throw new IllegalArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
            }
            cipher = new BufferedBlockCipher(
                        new SICBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("CTR"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedBlockCipher(
                        new SICBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("GOFB"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedBlockCipher(
                        new GOFBBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("CTS"))
        {
            ivLength = baseEngine.getBlockSize();

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

        {
            padded = false;
            
            if (!(cipher instanceof CTSBlockCipher))
            {
                cipher = new BufferedBlockCipher(cipher.getUnderlyingCipher());
            }
        }
        else if (paddingName.equals("PKCS5PADDING") || paddingName.equals("PKCS7PADDING"))
        {
            cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher());

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

            throws GeneralSecurityException, InvalidCipherTextException {
        PBES2Parameters pbeParams = new PBES2Parameters((ASN1Sequence) algId.getParameters());
        CipherParameters cipherParams = extractPBES2CipherParams(password, pbeParams);


        EncryptionScheme scheme = pbeParams.getEncryptionScheme();
        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)];
        int len = cipher.processBytes(data, 0, data.length, out, 0);
        len += cipher.doFinal(out, len);
        byte[] pkcs8 = new byte[len];
        System.arraycopy(out, 0, pkcs8, 0, len);
        KeyFactory fact = KeyFactory.getInstance("RSA"); // It seems to work for both RSA and DSA.
        return fact.generatePrivate(new PKCS8EncodedKeySpec(pkcs8));
    }

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

        throws PGPException
    {
        try
        {
            BlockCipher engine = BcImplProvider.createBlockCipher(encAlgorithm);
            BufferedBlockCipher cipher = BcUtil.createSymmetricKeyWrapper(true, engine, key, new byte[engine.getBlockSize()]);


            byte[] out = new byte[sessionInfo.length];


            int len = cipher.processBytes(sessionInfo, 0, sessionInfo.length, out, 0);


            len += cipher.doFinal(out, len);


            return out;
        }
        catch (InvalidCipherTextException e)
        {

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Examples of org.bouncycastle.crypto.BufferedBlockCipher


class BcUtil
{
    static BufferedBlockCipher createStreamCipher(boolean forEncryption, BlockCipher engine, boolean withIntegrityPacket, byte[] key)
    {
        BufferedBlockCipher c;


        if (withIntegrityPacket)
        {
            c = new BufferedBlockCipher(new CFBBlockCipher(engine, engine.getBlockSize() * 8));
        }
        else
        {
            c = new BufferedBlockCipher(new OpenPGPCFBBlockCipher(engine));
        }


        KeyParameter keyParameter = new KeyParameter(key);


        if (withIntegrityPacket)
        {
            c.init(forEncryption, new ParametersWithIV(keyParameter, new byte[engine.getBlockSize()]));
        }
        else
        {
            c.init(forEncryption, keyParameter);
        }


        return c;
    }

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

        return c;
    }


    public static PGPDataDecryptor createDataDecryptor(boolean withIntegrityPacket, BlockCipher engine, byte[] key)
    {
        final BufferedBlockCipher c = createStreamCipher(false, engine, withIntegrityPacket, key);


        return new PGPDataDecryptor()
        {
            public InputStream getInputStream(InputStream in)
            {
                return new CipherInputStream(in, c);
            }


            public int getBlockSize()
            {
                return c.getBlockSize();
            }


            public PGPDigestCalculator getIntegrityCalculator()
            {
                return new SHA1PGPDigestCalculator();

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Examples of org.bouncycastle.crypto.BufferedBlockCipher

        };
    }


    public static BufferedBlockCipher createSymmetricKeyWrapper(boolean forEncryption, BlockCipher engine, byte[] key, byte[] iv)
    {
        BufferedBlockCipher c = new BufferedBlockCipher(new CFBBlockCipher(engine, engine.getBlockSize() * 8));


        c.init(forEncryption, new ParametersWithIV(new KeyParameter(key), iv));


        return c;
    }

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