Example usage for javax.crypto CipherInputStream CipherInputStream

List of usage examples for javax.crypto CipherInputStream CipherInputStream

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Introduction

In this page you can find the example usage for javax.crypto CipherInputStream CipherInputStream.

Prototype

public CipherInputStream(InputStream is, Cipher c)

Source Link

Document

Constructs a CipherInputStream from an InputStream and a Cipher.

Usage

From source file:org.linagora.linshare.core.utils.SymmetricEnciphermentPBEwithAES.java

public void decryptStream() throws IOException {

    if (cipherMode != Cipher.DECRYPT_MODE)
        throw new IllegalStateException("can not call decrypt, check cipher mode");

    CipherInputStream cis = new CipherInputStream(in, cipher);

    // Read from encrypted input and write to output stream
    byte[] buffer = new byte[2048];
    int bytesRead;

    while ((bytesRead = cis.read(buffer)) != -1) {
        out.write(buffer, 0, bytesRead);
        //System.out.println(bytesRead);
    }/*from   ww  w  .  j a  v  a 2 s  . co m*/

    out.flush();
    out.close();
    cis.close();
    in.close();

}

From source file:org.opendatakit.briefcase.util.ExportToCsv.java

private String getSubmissionValue(EncryptionInformation ei, TreeElement model, Element element) {
    // could not find element, return null
    if (element == null) {
        return null;
    }//from  ww w . j  av  a 2 s .  c  o m

    StringBuilder b = new StringBuilder();

    int maxChildren = element.getChildCount();
    for (int i = 0; i < maxChildren; i++) {
        if (element.getType(i) == Node.TEXT) {
            b.append(element.getText(i));
        }
    }
    String rawElement = b.toString();

    // Field-level encryption support -- experimental
    if (JavaRosaParserWrapper.isEncryptedField(model)) {

        InputStreamReader isr = null;
        try {
            Cipher c = ei.getCipher("field:" + model.getName(), model.getName());

            isr = new InputStreamReader(
                    new CipherInputStream(new ByteArrayInputStream(Base64.decodeBase64(rawElement)), c),
                    "UTF-8");

            b.setLength(0);
            int ch;
            while ((ch = isr.read()) != -1) {
                char theChar = (char) ch;
                b.append(theChar);
            }
            return b.toString();

        } catch (IOException e) {
            e.printStackTrace();
            log.severe(" element name: " + model.getName() + " exception: " + e.toString());
        } catch (InvalidKeyException e) {
            e.printStackTrace();
            log.severe(" element name: " + model.getName() + " exception: " + e.toString());
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
            log.severe(" element name: " + model.getName() + " exception: " + e.toString());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            log.severe(" element name: " + model.getName() + " exception: " + e.toString());
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
            log.severe(" element name: " + model.getName() + " exception: " + e.toString());
        } finally {
            if (isr != null) {
                try {
                    isr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    return rawElement;
}

From source file:com.diona.fileReader.CipherUtil.java

/**
 * Decrypts a file./*from   ww  w .j a  v a 2s. c  o  m*/
 * 
 * @param path
 *          path of the encrypted file.
 * @param decryptedPath
 *          the path where file should be decrypted.
 * @param context
 *          context to fetch preferences.
 * @param decryptAsyncTask
 *          the AsyncTask that calls this method and needs to be updated. Ignored if null.
 */
public long decryptFile(final String path, final String decryptedPath, final Context context) {
    long empty = 123456789L;
    Date d1 = new Date();
    // Transaction.checkLongRunningProcessing("decryptFile");
    //System.err.println("Path = "+path);
    //System.err.println("decryptedPath = "+decryptedPath);
    try {
        final FileInputStream fis = new FileInputStream(path);
        final FileOutputStream fos = new FileOutputStream(decryptedPath);

        final InputStream inputStream;
        if (ENCRYPTION_ENABLED) {
            //System.err.println("DE - 1");
            //        final SecretKeySpec secret = getSecretKey(context);
            final SecretKeySpec secret = usedSecretKey;
            // Decrypt the message
            final Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
            //System.err.println("DE - 2");
            // cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(getIV(context)));
            cipher.init(Cipher.DECRYPT_MODE, secret, ivspec);
            //System.err.println("DE - 3");
            inputStream = new CipherInputStream(fis, cipher);
            //System.err.println("DE - 4");
        } else {
            inputStream = fis;
        }

        int b;
        final byte[] d = new byte[BUFFER_SIZE];
        int totalBytesWritten = 0;
        while ((b = inputStream.read(d)) != -1) {
            fos.write(d, 0, b);
            /*if (decryptAsyncTask != null) {
              totalBytesWritten += BUFFER_SIZE;
              decryptAsyncTask.updateProgress(totalBytesWritten);
            }*/
        }
        fos.flush();
        fos.close();
        inputStream.close();

        Date d2 = new Date();
        long diff = d2.getTime() - d1.getTime();
        long diffSeconds = diff / 1000 % 60;
        System.err.println("File decrypted SUCCESSFULLY. Time = " + diffSeconds);
        return diffSeconds;
    } catch (final Exception e) {
        Log.e(TAG, "e" + e);
        return empty;
    }
}

From source file:com.csipsimple.backup.SipProfileJson.java

/**
 * Restore a sip configuration//ww  w. j  a  va  2s .  c o m
 * 
 * @param ctxt
 * @param fileToRestore
 * @return
 */
public static boolean restoreSipConfiguration(Context ctxt, File fileToRestore, String filePassword) {
    if (fileToRestore == null || !fileToRestore.isFile()) {
        return false;
    }

    StringBuffer contentBuf = new StringBuffer();

    try {
        BufferedReader buf;
        String line;
        InputStream is = new FileInputStream(fileToRestore);
        if (!TextUtils.isEmpty(filePassword)) {
            Cipher c;
            try {
                c = Cipher.getInstance("AES");
                SecretKeySpec k = new SecretKeySpec(filePassword.getBytes(), "AES");
                c.init(Cipher.ENCRYPT_MODE, k);
                is = new CipherInputStream(is, c);
            } catch (NoSuchAlgorithmException e) {
                Log.e(THIS_FILE, "NoSuchAlgorithmException :: ", e);
            } catch (NoSuchPaddingException e) {
                Log.e(THIS_FILE, "NoSuchPaddingException :: ", e);
            } catch (InvalidKeyException e) {
                Log.e(THIS_FILE, "InvalidKeyException :: ", e);
            }
        }

        InputStreamReader fr = new InputStreamReader(is);
        buf = new BufferedReader(fr);
        while ((line = buf.readLine()) != null) {
            contentBuf.append(line);
        }
        fr.close();
    } catch (FileNotFoundException e) {
        Log.e(THIS_FILE, "Error while restoring", e);
    } catch (IOException e) {
        Log.e(THIS_FILE, "Error while restoring", e);
    }

    JSONArray accounts = null;
    JSONObject settings = null;
    // Parse json if some string here
    if (contentBuf.length() > 0) {
        try {
            JSONObject mainJSONObject = new JSONObject(contentBuf.toString());
            // Retrieve accounts
            accounts = mainJSONObject.getJSONArray(KEY_ACCOUNTS);
            // Retrieve settings
            settings = mainJSONObject.getJSONObject(KEY_SETTINGS);

        } catch (JSONException e) {
            Log.e(THIS_FILE, "Error while parsing saved file", e);
        }
    } else {
        return false;
    }

    if (accounts != null && accounts.length() > 0) {
        restoreSipAccounts(ctxt, accounts);
    }

    if (settings != null) {
        restoreSipSettings(ctxt, settings);
        return true;
    }

    return false;
}

From source file:Crypto.java

/**
 * Read from the encrypted file (input) and turn the cipher back into cleartext. Write the cleartext buffer back out
 * to disk as (output) File.//from   ww w .  ja va  2  s. com
 * 
 * I left CipherInputStream in here as a test to see if I could mix it with the update() and final() methods of encrypting
 *  and still have a correctly decrypted file in the end. Seems to work so left it in.
 *  
 * @param input - File object representing encrypted data on disk 
 * @param output - File object of cleartext data to write out after decrypting
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws IOException
 */
public void ReadEncryptedFile(File input, File output)
        throws IllegalBlockSizeException, BadPaddingException, IOException {
    FileInputStream fin;
    FileOutputStream fout;
    CipherInputStream cin;
    long totalread = 0;
    int nread = 0;
    byte[] inbuf = new byte[MAX_FILE_BUF];

    fout = new FileOutputStream(output);
    fin = new FileInputStream(input);

    // creating a decoding stream from the FileInputStream above using the cipher created from setupDecrypt()
    cin = new CipherInputStream(fin, mDecipher);

    while ((nread = cin.read(inbuf)) > 0) {
        Db("read " + nread + " bytes");
        totalread += nread;

        // create a buffer to write with the exact number of bytes read. Otherwise a short read fills inbuf with 0x0
        byte[] trimbuf = new byte[nread];
        for (int i = 0; i < nread; i++)
            trimbuf[i] = inbuf[i];

        // write out the size-adjusted buffer
        fout.write(trimbuf);
    }

    fout.flush();
    cin.close();
    fin.close();
    fout.close();

    Db("wrote " + totalread + " encrypted bytes");
}

From source file:org.linagora.linshare.core.utils.SymmetricEnciphermentPBEwithAES.java

/**
 * give a CipherInputStream to decrypt data, if you want to decrypt data yourself
 * in must be given in class constructor
 * @return// www . java2 s . c o m
 */
public CipherInputStream getCipherInputStream() {
    if (in == null)
        throw new IllegalStateException("can not give intialised CipherInputStream, check inputstream");
    return new CipherInputStream(in, cipher);
}

From source file:org.hardisonbrewing.s3j.FileSyncer.java

public PutObjectResult put(File file, boolean encrypted) throws Exception {

    if (!encrypted || privateKey == null) {
        return put(file);
    }/*from  w  w  w .j a v a 2s .  c  om*/

    long decryptedLength = file.length();
    String path = getBucketPath(file);

    byte[] rawKey = AesUtil.generateKey();
    Cipher cipher = Cipher.getInstance(AesUtil.ALGORITHM);
    cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(rawKey, AesUtil.ALGORITHM));

    int encryptedLength = cipher.getOutputSize((int) file.length());

    InputStream inputStream = null;

    try {
        inputStream = new FileInputStream(file);
        inputStream = new CipherInputStream(inputStream, cipher);
        put(path, inputStream, encryptedLength);
    } finally {
        IOUtil.close(inputStream);
    }

    byte[] encryptedKey = RsaUtil.encrypt(privateKey, rawKey);

    DataProperties properties = new DataProperties();
    properties.put(PROP_ALGORITHM, AesUtil.ALGORITHM);
    properties.put(PROP_DECRYPTED_LENGTH, decryptedLength);
    properties.put(PROP_ENCRYPTED_LENGTH, encryptedLength);
    properties.put(PROP_KEY, encryptedKey);
    properties.put(PROP_ORIG_FILE_PATH, file.getAbsolutePath());
    properties.put(PROP_LAST_MODIFIED, file.lastModified());
    uploadProperties(path, properties);

    PutObjectResult response = new PutObjectResult();
    response.file = file;
    response.properties = properties;
    response.bucketPath = path;
    return response;
}

From source file:org.apache.pdfbox.pdmodel.encryption.SecurityHandler.java

/**
 * Encrypt or decrypt data with AES256./*from   w  ww  . j a  v a 2s.  c o m*/
 *
 * @param data The data to encrypt.
 * @param output The output to write the encrypted data to.
 * @param decrypt true to decrypt the data, false to encrypt it.
 *
 * @throws IOException If there is an error reading the data.
 */
private void encryptDataAES256(InputStream data, OutputStream output, boolean decrypt) throws IOException {
    byte[] iv = new byte[16];

    if (decrypt) {
        // read IV from stream
        data.read(iv);
    } else {
        // generate random IV and write to stream
        SecureRandom rnd = new SecureRandom();
        rnd.nextBytes(iv);
        output.write(iv);
    }

    Cipher cipher;
    try {
        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        SecretKeySpec keySpec = new SecretKeySpec(encryptionKey, "AES");
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        cipher.init(decrypt ? Cipher.DECRYPT_MODE : Cipher.ENCRYPT_MODE, keySpec, ivSpec);
    } catch (GeneralSecurityException e) {
        throw new IOException(e);
    }

    CipherInputStream cis = new CipherInputStream(data, cipher);
    try {
        IOUtils.copy(cis, output);
    } catch (IOException exception) {
        // starting with java 8 the JVM wraps an IOException around a GeneralSecurityException
        // it should be safe to swallow a GeneralSecurityException
        if (!(exception.getCause() instanceof GeneralSecurityException)) {
            throw exception;
        }
        LOG.debug("A GeneralSecurityException occured when decrypting some stream data", exception);
    } finally {
        cis.close();
    }
}

From source file:ropes.Crypto.java

/**
* Read from the encrypted file (input) and turn the cipher back into cleartext. Write the cleartext buffer back out
* to disk as (output) File./*from  w w  w.j a v a2 s .  c  om*/
* 
* I left CipherInputStream in here as a test to see if I could mix it with the update() and final() methods of encrypting
*  and still have a correctly decrypted file in the end. Seems to work so left it in.
*  
* @param input - File object representing encrypted data on disk 
* @param output - File object of cleartext data to write out after decrypting
* @throws IllegalBlockSizeException
* @throws BadPaddingException
* @throws IOException
*/
public void ReadEncryptedFile(File input, File output) {
    try {
        FileInputStream fin;
        FileOutputStream fout;
        CipherInputStream cin;
        long totalread = 0;
        int nread = 0;
        byte[] inbuf = new byte[MAX_FILE_BUF];

        fout = new FileOutputStream(output);
        fin = new FileInputStream(input);

        // creating a decoding stream from the FileInputStream above using the cipher created from setupDecrypt()
        cin = new CipherInputStream(fin, mDecipher);

        while ((nread = cin.read(inbuf)) > 0) {
            Db("read " + nread + " bytes");
            totalread += nread;

            // create a buffer to write with the exact number of bytes read. Otherwise a short read fills inbuf with 0x0
            byte[] trimbuf = new byte[nread];
            for (int i = 0; i < nread; i++)
                trimbuf[i] = inbuf[i];

            // write out the size-adjusted buffer
            fout.write(trimbuf);
        }

        fout.flush();
        cin.close();
        fin.close();
        fout.close();

        Db("wrote " + totalread + " encrypted bytes");
    } catch (FileNotFoundException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    }
}

From source file:com.filelocker.encryption.AES_Encryption.java

/**
 * Read from the encrypted file (input) and turn the cipher back into cleartext. Write the cleartext buffer back out
 * to disk as (output) File.//from ww w. j  a  v a2 s  . com
 *
 * I left CipherInputStream in here as a test to see if I could mix it with the update() and final() methods of encrypting
 *  and still have a correctly decrypted file in the end. Seems to work so left it in.
 *
 * @param input - File object representing encrypted data on disk
 * @param output - File object of cleartext data to write out after decrypting
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws IOException
 */
public void ReadEncryptedFile(File input, File output)
        throws IllegalBlockSizeException, BadPaddingException, IOException {
    FileInputStream fin;
    FileOutputStream fout;
    CipherInputStream cin;
    long totalread = 0;
    int nread = 0;
    byte[] inbuf = new byte[MAX_FILE_BUF];

    fout = new FileOutputStream(output);
    fin = new FileInputStream(input);

    // creating a decoding stream from the FileInputStream above using the cipher created from setupDecrypt()
    cin = new CipherInputStream(fin, vDecipher);

    while ((nread = cin.read(inbuf)) > 0) {
        Db("read " + nread + " bytes");
        totalread += nread;

        // create a buffer to write with the exact number of bytes read. Otherwise a short read fills inbuf with 0x0
        byte[] trimbuf = new byte[nread];
        for (int i = 0; i < nread; i++)
            trimbuf[i] = inbuf[i];

        // write out the size-adjusted buffer
        fout.write(trimbuf);
    }

    fout.flush();
    cin.close();
    fin.close();
    fout.close();

    Db("wrote " + totalread + " dencrypted bytes");
    Db("Decryption Complete File Unlocked");
}