Example usage for javax.crypto Cipher getIV

Introduction

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

Prototype

public final byte[] getIV() 

Source Link

Document

Returns the initialization vector (IV) in a new buffer.

Usage

From source file:MainClass.java

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

    keyGenerator.init(128);/*from  w  ww .j ava 2  s. co 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 main(String args[]) throws Exception {
    KeyGenerator kg = KeyGenerator.getInstance("DES");
    Cipher c = Cipher.getInstance("DES/CBC/PKCS5Padding");
    Key key = kg.generateKey();//from   www . j a va  2s.c  o m

    c.init(Cipher.ENCRYPT_MODE, key);
    byte input[] = "Stand and unfold yourself".getBytes();
    byte encrypted[] = c.doFinal(input);
    byte iv[] = c.getIV();

    IvParameterSpec dps = new IvParameterSpec(iv);
    c.init(Cipher.DECRYPT_MODE, key, dps);
    byte output[] = c.doFinal(encrypted);
    System.out.println(new String(output));
}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {
    KeyGenerator kg = KeyGenerator.getInstance("DES");
    kg.init(new SecureRandom());
    SecretKey key = kg.generateKey();
    SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
    Class spec = Class.forName("javax.crypto.spec.DESKeySpec");
    DESKeySpec ks = (DESKeySpec) skf.getKeySpec(key, spec);
    ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("keyfile"));
    oos.writeObject(ks.getKey());//from   w ww  .ja v  a2s .  com

    Cipher c = Cipher.getInstance("DES/CFB8/NoPadding");
    c.init(Cipher.ENCRYPT_MODE, key);
    CipherOutputStream cos = new CipherOutputStream(new FileOutputStream("ciphertext"), c);
    PrintWriter pw = new PrintWriter(new OutputStreamWriter(cos));
    pw.println("Stand and unfold yourself");
    pw.close();
    oos.writeObject(c.getIV());
    oos.close();
}

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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[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72, 0x06, 0x75,
            0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03, (byte) 0xdd, (byte) 0xd9,
            0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
    byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6, 0x08,
            (byte) 0xb8 };

    // encrypt the data using precalculated keys

    Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");
    cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(ivBytes));

    byte[] out = cEnc.doFinal(input);
    // decrypt the data using PBE

    char[] password = "password".toCharArray();
    byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
    int iterationCount = 2048;
    PBEKeySpec pbeSpec = new PBEKeySpec(password, salt, iterationCount);
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES");

    Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES");
    Key sKey = keyFact.generateSecret(pbeSpec);

    cDec.init(Cipher.DECRYPT_MODE, sKey);

    System.out.println("cipher : " + new String(out));
    System.out.println("gen key: " + new String(sKey.getEncoded()));
    System.out.println("gen iv : " + new String(cDec.getIV()));
    System.out.println("plain  : " + new String(cDec.doFinal(out)));
}

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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[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72, 0x06, 0x75,
            0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03, (byte) 0xdd, (byte) 0xd9,
            0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
    byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6, 0x08,
            (byte) 0xb8 };

    // encrypt the data using precalculated keys

    Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");

    cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(ivBytes));

    byte[] out = cEnc.doFinal(input);

    // decrypt the data using PBE

    char[] password = "password".toCharArray();
    byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
    int iterationCount = 2048;
    PBEKeySpec pbeSpec = new PBEKeySpec(password);
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");

    Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
    Key sKey = keyFact.generateSecret(pbeSpec);

    cDec.init(Cipher.DECRYPT_MODE, sKey, new PBEParameterSpec(salt, iterationCount));

    System.out.println("cipher : " + new String(out));
    System.out.println("gen key: " + new String(sKey.getEncoded()));
    System.out.println("gen iv : " + new String(cDec.getIV()));
    System.out.println("plain  : " + new String(cDec.doFinal(out)));
}

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From source file:com.tremolosecurity.unison.u2f.util.U2fUtil.java

public static String encode(List<SecurityKeyData> devices, String encyrptionKeyName) throws Exception {
    ArrayList<KeyHolder> keys = new ArrayList<KeyHolder>();
    for (SecurityKeyData dr : devices) {
        KeyHolder kh = new KeyHolder();
        kh.setCounter(dr.getCounter());/*from  w w  w  .  j  a v a  2 s.co  m*/
        kh.setEnrollmentTime(dr.getEnrollmentTime());
        kh.setKeyHandle(dr.getKeyHandle());
        kh.setPublicKey(dr.getPublicKey());
        kh.setTransports(dr.getTransports());
        keys.add(kh);
    }

    String json = gson.toJson(keys);
    EncryptedMessage msg = new EncryptedMessage();

    SecretKey key = GlobalEntries.getGlobalEntries().getConfigManager().getSecretKey(encyrptionKeyName);
    if (key == null) {
        throw new Exception("Queue message encryption key not found");
    }

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key);
    msg.setMsg(cipher.doFinal(json.getBytes("UTF-8")));
    msg.setIv(cipher.getIV());

    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    DeflaterOutputStream compressor = new DeflaterOutputStream(baos,
            new Deflater(Deflater.BEST_COMPRESSION, true));

    compressor.write(gson.toJson(msg).getBytes("UTF-8"));
    compressor.flush();
    compressor.close();

    String b64 = new String(Base64.encodeBase64(baos.toByteArray()));

    return b64;

}

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From source file:de.marius_oe.cfs.cryption.Crypter.java

/**
 * Encrypts the given input stream and stores the encrypted data in the
 * destinationFile.//ww w  . jav  a2  s .  c o  m
 *
 * @param inStream
 *            plain text stream
 * @param destinationStream
 *            stream for the encrypted data
 * @param compressStream
 *            whether the data should be compressed before encryption
 */
public static void encrypt(InputStream inStream, OutputStream destinationStream, boolean compressStream) {
    logger.debug("encrypting inputstream - compressed: {}", compressStream);

    InputStream tempInputStream;

    if (compressStream) {
        logger.debug("Compress InputStream.");
        tempInputStream = StreamUtils.zipStream(inStream);
    } else {
        tempInputStream = inStream;
    }

    Cipher cipher = getCipher(Cipher.ENCRYPT_MODE, null);

    logger.debug("Encrypt InputStream.");
    tempInputStream = new CipherInputStream(tempInputStream, cipher);

    try {
        // write iv to the beginning of the stream
        destinationStream.write((byte) cipher.getIV().length);
        destinationStream.write(cipher.getIV());

        int bytesCopied = IOUtils.copy(tempInputStream, destinationStream);

        logger.debug("encryption done. copied {} encrypted bytes to the outputstream", bytesCopied);

        tempInputStream.close();
        destinationStream.close();
    } catch (IOException e) {
        logger.error("Encryption failed - Reason: {}", e.getLocalizedMessage());
        throw new RuntimeException(e);
    }
}

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From source file:com.tremolosecurity.provisioning.customTasks.CreateOTPKey.java

public static String generateEncryptedToken(String userID, GoogleAuthenticatorKey key, String hostName,
        ConfigManager cfg, String encryptionKey) throws ProvisioningException {
    TOTPKey totpkey = new TOTPKey();
    totpkey.setHost(hostName);/*from   w  w w  .  j av  a  2 s . c o m*/
    totpkey.setScratchCodes(key.getScratchCodes());
    totpkey.setSecretKey(key.getKey());
    totpkey.setUserName(userID);
    totpkey.setValidationCode(key.getVerificationCode());

    Gson gson = new Gson();
    String json = gson.toJson(totpkey);
    SecretKey sc = cfg.getSecretKey(encryptionKey);
    String attrVal = null;
    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        baos.write(json.getBytes("UTF-8"));

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, sc);

        byte[] encJson = cipher.doFinal(baos.toByteArray());
        String base64d = new String(org.bouncycastle.util.encoders.Base64.encode(encJson));

        Token token = new Token();
        token.setEncryptedRequest(base64d);
        token.setIv(new String(org.bouncycastle.util.encoders.Base64.encode(cipher.getIV())));

        json = gson.toJson(token);
        attrVal = new String(org.bouncycastle.util.encoders.Base64.encode(json.getBytes("UTF-8")));

    } catch (Exception e) {
        throw new ProvisioningException("Could not encrypt key", e);
    }
    return attrVal;
}

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From source file:alfio.manager.CheckInManager.java

public static String encrypt(String key, String payload) {
    try {//from  w w  w  . j  a v  a  2  s . com
        Pair<Cipher, SecretKeySpec> cipherAndSecret = getCypher(key);
        Cipher cipher = cipherAndSecret.getKey();
        cipher.init(Cipher.ENCRYPT_MODE, cipherAndSecret.getRight());
        byte[] data = cipher.doFinal(payload.getBytes(StandardCharsets.UTF_8));
        byte[] iv = cipher.getIV();
        return Base64.encodeBase64URLSafeString(iv) + "|" + Base64.encodeBase64URLSafeString(data);
    } catch (GeneralSecurityException e) {
        throw new IllegalStateException(e);
    }
}

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From source file:org.mozilla.android.sync.Cryptographer.java

public static CryptoInfo encrypt(CryptoInfo info) {

    Cipher cipher = getCipher();
    try {/*from ww  w.  j  a v  a2 s . com*/
        cipher.init(Cipher.ENCRYPT_MODE,
                new SecretKeySpec(info.getKeys().getEncryptionKey(), KEY_ALGORITHM_SPEC));
    } catch (InvalidKeyException e) {
        e.printStackTrace();
        return null;
    }

    // Encrypt
    byte[] encryptedBytes = commonCrypto(cipher, info.getMessage());
    info.setMessage(encryptedBytes);

    // Save IV
    info.setIv(cipher.getIV());

    // Generate HMAC
    info.setHmac(generateHmac(info));

    return info;

}

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