Example usage for javax.crypto CipherOutputStream close

Introduction

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

Prototype

public void close() throws IOException 

Source Link

Document

Closes this output stream and releases any system resources associated with this stream.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
            0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };
    byte[] ivBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x01 };/*from  w  w  w  .j  a va  2s.  com*/

    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
    Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
    System.out.println("input : " + new String(input));

    // encryption pass
    cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
    ByteArrayInputStream bIn = new ByteArrayInputStream(input);
    CipherInputStream cIn = new CipherInputStream(bIn, cipher);
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();

    int ch;
    while ((ch = cIn.read()) >= 0) {
        bOut.write(ch);
    }

    byte[] cipherText = bOut.toByteArray();

    System.out.println("cipher: " + new String(cipherText));

    // decryption pass
    cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
    bOut = new ByteArrayOutputStream();
    CipherOutputStream cOut = new CipherOutputStream(bOut, cipher);
    cOut.write(cipherText);
    cOut.close();
    System.out.println("plain : " + new String(bOut.toByteArray()));
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");

    keyGenerator.init(128);/*from  ww  w  .  j av a 2  s.  com*/
    Key secretKey = keyGenerator.generateKey();

    Cipher cipherOut = Cipher.getInstance("Blowfish/CFB/NoPadding");

    cipherOut.init(Cipher.ENCRYPT_MODE, secretKey);
    BASE64Encoder encoder = new BASE64Encoder();
    byte iv[] = cipherOut.getIV();
    if (iv != null) {
        System.out.println("Initialization Vector of the Cipher:\n" + encoder.encode(iv));
    }
    FileInputStream fin = new FileInputStream("inputFile.txt");
    FileOutputStream fout = new FileOutputStream("outputFile.txt");
    CipherOutputStream cout = new CipherOutputStream(fout, cipherOut);
    int input = 0;
    while ((input = fin.read()) != -1) {
        cout.write(input);
    }

    fin.close();
    cout.close();
}

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From source file:MainClass.java

public static void write(byte[] bytes, OutputStream out) throws Exception {
    CipherOutputStream cos = new CipherOutputStream(out, m_encrypter);
    cos.write(bytes, 0, bytes.length);/*from www.  j  a  v  a2  s .c  o  m*/
    cos.close();
}

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From source file:org.jgrades.lic.api.crypto.decrypt.LicenceDecryptionProvider.java

private static ByteArrayOutputStream getDecryptedOutputStream(byte[] encryptedLicXmlBytes, Cipher cipher)
        throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    CipherOutputStream cos = new CipherOutputStream(bos, cipher);
    IOUtils.write(encryptedLicXmlBytes, cos);
    cos.close();
    return bos;//from   w  w  w.  j  av a2s . co m
}

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From source file:MainClass.java

public static void desEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;/*w  ww . j  av  a2s . c om*/
    ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("DESKey.ser"));
    key = (SecretKey) keyFile.readObject();
    keyFile.close();

    KeyGenerator keygen = KeyGenerator.getInstance("DES");
    key = keygen.generateKey();
    ObjectOutputStream keyFileout = new ObjectOutputStream(new FileOutputStream("DESKey.ser"));
    keyFileout.writeObject(key);
    keyFileout.close();
    Cipher cipher = null;
    cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key);
    BufferedInputStream in = new BufferedInputStream(new FileInputStream(f1));

    CipherOutputStream out = new CipherOutputStream(new BufferedOutputStream(new FileOutputStream(f2)), cipher);
    int i;
    do {
        i = in.read();
        if (i != -1)
            out.write(i);
    } while (i != -1);
    in.close();
    out.close();
}

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From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
private static String encryptStringImpl(Context context, final String plainText) {
    String encryptedText = plainText;
    try {/* ww w.j a v  a  2  s  .c  o  m*/
        final KeyStore keyStore = getKeyStore(context);

        PublicKey publicKey = keyStore.getCertificate(KEY_ALIAS).getPublicKey();

        String algorithm = ALGORITHM_OLD;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            algorithm = ALGORITHM;
        }
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        CipherOutputStream cipherOutputStream = new CipherOutputStream(outputStream, cipher);
        cipherOutputStream.write(plainText.getBytes("UTF-8"));
        cipherOutputStream.close();

        byte[] bytes = outputStream.toByteArray();
        encryptedText = Base64.encodeToString(bytes, Base64.DEFAULT);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return encryptedText;
}

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From source file:Main.java

public static void encrypt(String fileIn, String fileOut, byte key[])
        throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
    // Here you read the cleartext.
    FileInputStream fis = new FileInputStream(fileIn);
    // This stream write the encrypted text. This stream will be wrapped by another stream.
    FileOutputStream fos = new FileOutputStream(fileOut);

    // Length is 32 bytes
    //byte key[] = "1010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100000011010110101010101010100101111001001001001001001011110111100001111000011".getBytes("UTF-8");
    MessageDigest sha = MessageDigest.getInstance("SHA-256");
    key = sha.digest(key);/*from   www.j  a v a 2 s .co  m*/
    SecretKeySpec sks = new SecretKeySpec(key, "AES");
    // Create cipher
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, sks);
    // Wrap the output stream
    CipherOutputStream cos = new CipherOutputStream(fos, cipher);
    // Write bytes
    int b;
    byte[] d = new byte[8];
    while ((b = fis.read(d)) != -1) {
        cos.write(d, 0, b);
    }
    // Flush and close streams.
    cos.flush();
    cos.close();
    fis.close();
}

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From source file:TripleDES.java

/**
 * Use the specified TripleDES key to encrypt bytes from the input stream
 * and write them to the output stream. This method uses CipherOutputStream
 * to perform the encryption and write bytes at the same time.
 *///  w  w w . j  ava2  s. c o  m
public static void encrypt(SecretKey key, InputStream in, OutputStream out)
        throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IOException {
    // Create and initialize the encryption engine
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.ENCRYPT_MODE, key);

    // Create a special output stream to do the work for us
    CipherOutputStream cos = new CipherOutputStream(out, cipher);

    // Read from the input and write to the encrypting output stream
    byte[] buffer = new byte[2048];
    int bytesRead;
    while ((bytesRead = in.read(buffer)) != -1) {
        cos.write(buffer, 0, bytesRead);
    }
    cos.close();

    // For extra security, don't leave any plaintext hanging around memory.
    java.util.Arrays.fill(buffer, (byte) 0);
}

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From source file:uploadProcess.java

public static boolean encrypt(File inputFolder, File outputFolder, String fileName, String patientID) {
    try {// ww  w.j  a va2s  . c o  m

        String ukey = GetKey.getPatientKey(patientID);
        File filePath = new File(inputFolder.getAbsolutePath() + File.separator + fileName);
        FileInputStream fis = new FileInputStream(filePath);
        File outputFile = new File(outputFolder.getAbsolutePath() + File.separator + fileName);
        FileOutputStream fos = new FileOutputStream(outputFile);
        byte[] k = ukey.getBytes();
        SecretKeySpec key = new SecretKeySpec(k, "AES");
        //            System.out.println(key);
        Cipher enc = Cipher.getInstance("AES");
        enc.init(Cipher.ENCRYPT_MODE, key);
        CipherOutputStream cos = new CipherOutputStream(fos, enc);
        byte[] buf = new byte[1024];
        int read;
        while ((read = fis.read(buf)) != -1) {
            cos.write(buf, 0, read);
        }
        fis.close();
        fos.flush();
        cos.close();

        //Upload File to cloud
        DropboxUpload upload = new DropboxUpload();
        upload.uploadFile(outputFolder, fileName, StoragePath.getDropboxDir() + patientID);
        DeleteDirectory.delete(outputFolder);
        return true;
    } catch (Exception e) {
        System.out.println("Error: " + e);
    }
    return false;
}

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From source file:uploadProcess.java

public static boolean decrypt(File inputFolder, String fileName, String patientID) {
    try {// www  .ja v  a 2 s .  co m
        //Download File from Cloud..
        DropboxUpload download = new DropboxUpload();
        download.downloadFile(fileName, StoragePath.getDropboxDir() + patientID, inputFolder);

        String ukey = GetKey.getPatientKey(patientID);
        File inputFile = new File(inputFolder.getAbsolutePath() + File.separator + fileName);
        FileInputStream fis = new FileInputStream(inputFile);
        File outputFolder = new File(inputFolder.getAbsolutePath() + File.separator + "temp");
        if (!outputFolder.exists()) {
            outputFolder.mkdir();
        }
        FileOutputStream fos = new FileOutputStream(outputFolder.getAbsolutePath() + File.separator + fileName);
        byte[] k = ukey.getBytes();
        SecretKeySpec key = new SecretKeySpec(k, "AES");
        Cipher enc = Cipher.getInstance("AES");
        enc.init(Cipher.DECRYPT_MODE, key);
        CipherOutputStream cos = new CipherOutputStream(fos, enc);
        byte[] buf = new byte[1024];
        int read;
        while ((read = fis.read(buf)) != -1) {
            cos.write(buf, 0, read);
        }
        fis.close();
        fos.flush();
        cos.close();
        return true;
    } catch (Exception e) {
        System.out.println("Error: " + e);
    }
    return false;
}

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