Example usage for javax.crypto CipherOutputStream write

Introduction

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

Prototype

public void write(byte b[]) throws IOException 

Source Link

Document

Writes b.length bytes from the specified byte array to this output 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 };// www . j  a  va2s .  c  o m

    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   w  ww  .jav  a2 s. c o  m
    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 desEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;/*  w  w w  . ja  v  a  2 s.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 {/*from   w ww  . jav  a 2s  . co 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:org.panbox.core.crypto.CryptCore.java

public static byte[] _asymmetricDecrypt(byte[] symKey, PrivateKey pKey)
        throws InvalidKeyException, IOException {
    ASYMM_CIPHER.init(Cipher.DECRYPT_MODE, pKey);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    CipherOutputStream cos = new CipherOutputStream(bos, ASYMM_CIPHER);
    cos.write(symKey);
    cos.flush();// w  ww  .  j  av  a2s.com
    cos.close();
    byte[] byteArray = bos.toByteArray();
    return byteArray;
}

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From source file:org.panbox.core.crypto.CryptCore.java

public static byte[] encryptSymmetricKey(byte[] symKey, PublicKey pKey) throws SymmetricKeyEncryptionException {
    try {/*from   ww w  .  j  av a 2s.c  o  m*/
        ASYMM_CIPHER.init(Cipher.ENCRYPT_MODE, pKey);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        CipherOutputStream cos = new CipherOutputStream(bos, ASYMM_CIPHER);
        cos.write(symKey);
        cos.flush();
        cos.close();
        byte[] byteArray = bos.toByteArray();
        return byteArray;
    } catch (Exception e) {
        throw new SymmetricKeyEncryptionException(e);
    }
}

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From source file:com.data.pack.Util.java

public static void copyFile(InputStream in, OutputStream out, int flag) throws IOException {
    byte[] buffer = new byte[1024];
    int read;/*  ww  w .j av a  2 s .  c  om*/

    try {

        Cipher encipher = null;
        try {
            encipher = Cipher.getInstance("AES");
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Cipher decipher = null;
        try {
            decipher = Cipher.getInstance("AES");
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        KeyGenerator kgen = null;
        try {
            kgen = KeyGenerator.getInstance("AES");
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        byte[] keyStart = "fitnesSbridge".getBytes();
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
        sr.setSeed(keyStart);
        kgen.init(128, sr); // 192 and 256 bits may not be available
        SecretKey skey = kgen.generateKey();

        // byte key[] =
        // {0x00,0x32,0x22,0x11,0x00,0x00,0x00,0x00,0x00,0x23,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
        skey = kgen.generateKey();
        // Lgo
        try {
            encipher.init(Cipher.ENCRYPT_MODE, skey);
        } catch (InvalidKeyException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        CipherInputStream cis = new CipherInputStream(in, encipher);
        try {
            decipher.init(Cipher.DECRYPT_MODE, skey);
        } catch (InvalidKeyException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        CipherOutputStream cos = new CipherOutputStream(out, decipher);

        try {

            if (flag == 2) {
                cos = new CipherOutputStream(out, encipher);
            } else {
                cos = new CipherOutputStream(out, decipher);
            }
            while ((read = in.read()) != -1) {
                cos.write(read);
                cos.flush();
            }

            cos.flush();
            cos.close();
            in.close();

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            out.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    } catch (Exception e) {
        // TODO: handle exception
    }

    //
    // byte[] keyStart = "this is a key".getBytes();
    // KeyGenerator kgen = KeyGenerator.getInstance("AES");
    // SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    // sr.setSeed(keyStart);
    // kgen.init(128, sr); // 192 and 256 bits may not be available
    // SecretKey skey = kgen.generateKey();
    // byte[] key = skey.getEncoded();
    //
    //
    // byte[] b = baos.toByteArray();
    // while ((read = in.read(buffer)) != -1) {
    //
    // // decrypt
    // byte[] decryptedData = Util.decrypt(key,buffer);
    // out.write(decryptedData, 0, read);
    // }
    // } catch (NoSuchAlgorithmException e) {
    // // TODO Auto-generated catch block
    // e.printStackTrace();
    // }
    // catch (Exception e) {
    // // TODO: handle exception
    // }
    //
}

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From source file:com.cubusmail.server.mail.security.MailPasswordEncryptor.java

public byte[] encryptPassowrd(String password) {

    Cipher cipher;//from   w w  w. java 2s.c  om
    try {
        cipher = Cipher.getInstance(this.algorithm);
        cipher.init(Cipher.ENCRYPT_MODE, this.keyPair.getPublic());

        ByteArrayOutputStream baosEncryptedData = new ByteArrayOutputStream();
        CipherOutputStream cos = new CipherOutputStream(baosEncryptedData, cipher);

        cos.write(password.getBytes("UTF-8"));
        cos.flush();
        cos.close();

        return baosEncryptedData.toByteArray();
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw new IllegalStateException(e.getMessage(), e);
    }
}

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From source file:enc_mods.aes.java

/**
 * Encrypts the AES key to a file using an RSA public key
 *//*  w w  w .j a v  a  2  s  .c om*/
public void saveKey(File out, File publicKeyFile) {
    try {
        // read public key to be used to encrypt the AES key
        byte[] encodedKey = new byte[(int) publicKeyFile.length()];
        new FileInputStream(publicKeyFile).read(encodedKey);

        // create public key
        X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(encodedKey);
        KeyFactory kf = KeyFactory.getInstance("RSA");
        PublicKey pk = kf.generatePublic(publicKeySpec);

        // write AES key
        cipher.init(Cipher.ENCRYPT_MODE, pk);
        CipherOutputStream os = new CipherOutputStream(new FileOutputStream(out), cipher);
        os.write(key);
        os.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:net.tawacentral.roger.secrets.FileUtils.java

/**
 * Returns an encrypted json stream representing the user's secrets.
 *
 * @param cipher//from   w w  w  . jav a 2  s.c o m
 *          The encryption cipher to use with the file.
 * @param secrets
 *          The list of secrets.
 * @return byte array of secrets
 * @throws IOException
 *           if any error occurs
 */
public static byte[] toEncryptedJSONSecretsStream(Cipher cipher, ArrayList<Secret> secrets) throws IOException {
    CipherOutputStream output = null;
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    try {
        output = new CipherOutputStream(baos, cipher);
        output.write(FileUtils.toJSONSecrets(secrets).toString().getBytes("UTF-8"));
    } catch (Exception e) {
        Log.e(LOG_TAG, "toEncryptedJSONSecretsStream", e);
        throw new IOException("toEncryptedJSONSecretsStream failed: " + e.getMessage());
    } finally {
        try {
            if (null != output)
                output.close();
        } catch (IOException ex) {
        }
    }

    return baos.toByteArray();
}

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