Example usage for javax.crypto.spec IvParameterSpec IvParameterSpec

Introduction

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

Prototype

public IvParameterSpec(byte[] iv) 

Source Link

Document

Creates an IvParameterSpec object using the bytes in iv as the IV.

Usage

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

/**
 * Returns the {@link Cipher} for the encryption and decryption process.
 * //from w  ww.  ja  v  a2 s  .  co m
 * @param mode
 *            {@link Cipher.DECRYPT_MODE} or {@link Cipher.ENCRYPT_MODE}
 * @param iv
 *            the initial vector which should be used in the cipher. if the
 *            iv is <code>null</code>, a new iv will be generated.
 * @return {@link Cipher} object
 */
private static Cipher getCipher(int mode, byte[] iv) {
    try {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        if (iv == null) {
            cipher.init(mode, KeyManager.instance().getKey());
        } else {
            IvParameterSpec parameterSpec = new IvParameterSpec(iv);
            cipher.init(mode, KeyManager.instance().getKey(), parameterSpec);
        }
        return cipher;
    } catch (InvalidKeyException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    }
}

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From source file:com.myapp.common.AES4MEncrypt.java

/**
 * //from w w w . jav a2s  .c om
 * 
 * @param sSrc ?
 * @param sKey KEY
 * @return
 * @throws Exception
 * @author cdduqiang
 * @date 201443
 */
public static String decrypt(String sSrc, String sKey) throws Exception {
    if (sKey == null) {
        log.error("Decrypt Key ??");
        throw new Exception("Decrypt Key ??");
    }

    byte[] raw = hex2byte(sKey);
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
    byte[] encrypted1 = hex2byte(sSrc);

    byte[] original = cipher.doFinal(encrypted1);
    return new String(original, ENCODING);// anslBytes2String(original);
}

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From source file:Main.java

/**
 * More flexible AES decrypt that doesn't encode
 *
 * @param key AES key typically 128, 192 or 256 bit
 * @param iv Initiation Vector/* www. j  a v a  2s.  c om*/
 * @param decodedCipherText in bytes (assumed it's already been decoded)
 * @return Decrypted message cipher text (not encoded)
 * @throws GeneralSecurityException if something goes wrong during encryption
 */
public static byte[] decrypt(final SecretKeySpec key, final byte[] iv, final byte[] decodedCipherText)
        throws GeneralSecurityException {
    final Cipher cipher = Cipher.getInstance(AES_MODE);
    IvParameterSpec ivSpec = new IvParameterSpec(iv);
    cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
    byte[] decryptedBytes = cipher.doFinal(decodedCipherText);

    log("decryptedBytes", decryptedBytes);

    return decryptedBytes;
}

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From source file:com.elle.analyster.admissions.AESCrypt.java

public static String decrypt(String key, String initVector, String encrypted) {
    try {// w  w  w.jav a 2  s  . co m
        IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

        byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));

        return new String(original);
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}

---

From source file:com.cloudant.sync.datastore.encryption.DPKEncryptionUtil.java

/**
 * AES Encrypt a byte array/*from  w  w w  . jav  a 2 s. c  o  m*/
 *
 * @param key              The encryption key
 * @param iv               The iv
 * @param unencryptedBytes The data to encrypt
 * @return The encrypted data
 * @throws NoSuchPaddingException
 * @throws NoSuchAlgorithmException
 * @throws InvalidAlgorithmParameterException
 * @throws InvalidKeyException
 * @throws BadPaddingException
 * @throws IllegalBlockSizeException
 */
public static byte[] encryptAES(SecretKey key, byte[] iv, byte[] unencryptedBytes)
        throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    Cipher aesCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec ivParameter = new IvParameterSpec(iv);
    // see http://stackoverflow.com/a/11506343
    Key encryptionKey = new SecretKeySpec(key.getEncoded(), "AES");
    aesCipher.init(Cipher.ENCRYPT_MODE, encryptionKey, ivParameter);
    return aesCipher.doFinal(unencryptedBytes);
}

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From source file:com.amazonaws.cognito.devauthsample.AESEncryption.java

private static byte[] encrypt(String clearText, String key, byte[] iv) {
    try {//from  www  .j av  a2s.co m
        Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
        AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
        params.init(new IvParameterSpec(iv));
        cipher.init(Cipher.ENCRYPT_MODE, getKey(key), params);
        return cipher.doFinal(clearText.getBytes());
    } catch (GeneralSecurityException e) {
        throw new RuntimeException("Failed to encrypt.", e);
    }
}

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From source file:com.paypal.utilities.AESDecrypt.java

public AESDecrypt(String encryptedString) throws Exception {
    SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    KeySpec keySpec = new PBEKeySpec(passphrase.toCharArray(), SALT, ITERATION_COUNT, KEY_LENGTH);
    SecretKey secretKeyTemp = secretKeyFactory.generateSecret(keySpec);
    SecretKey secretKey = new SecretKeySpec(secretKeyTemp.getEncoded(), "AES");

    encrypt = Base64.decodeBase64(encryptedString.getBytes());

    eCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    eCipher.init(Cipher.ENCRYPT_MODE, secretKey);

    byte[] iv = extractIV();
    dCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    dCipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(iv));
}

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From source file:OfficeAdministrator.Encrypt.java

public static String DecryptText(String EncText) {

    String RawText = "";
    byte[] keyArray = new byte[24];
    byte[] temporaryKey;
    String key = "developersnotedotcom";
    byte[] toEncryptArray = null;

    try {/*from w  w w .  ja v  a2  s  .  c om*/
        MessageDigest m = MessageDigest.getInstance("MD5");
        temporaryKey = m.digest(key.getBytes("UTF-8"));

        if (temporaryKey.length < 24) // DESede require 24 byte length key
        {
            int index = 0;
            for (int i = temporaryKey.length; i < 24; i++) {
                keyArray[i] = temporaryKey[index];
            }
        }

        Cipher c = Cipher.getInstance("DESede/CBC/PKCS5Padding");
        c.init(Cipher.DECRYPT_MODE, new SecretKeySpec(keyArray, "DESede"), new IvParameterSpec(sharedvector));
        byte[] decrypted = c.doFinal(Base64.decodeBase64(EncText));

        RawText = new String(decrypted, "UTF-8");
    } catch (Exception NoEx) {
        JOptionPane.showMessageDialog(null, NoEx);
    }

    return RawText;

}

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From source file:Logi.GSeries.Libraries.Encryption.java

public static String decrypt(String encryptedString, String password) {
    try {//from w  w w  .j a  v a2  s  .c  o  m
        byte[] encryptedWithIV = Base64.decodeBase64(encryptedString);
        byte initialVector[] = new byte[16];
        byte[] encrypted = new byte[encryptedWithIV.length - initialVector.length];
        System.arraycopy(encryptedWithIV, 0, encrypted, 0, encrypted.length);
        System.arraycopy(encryptedWithIV, encrypted.length, initialVector, 0, initialVector.length);
        IvParameterSpec ivspec = new IvParameterSpec(initialVector);
        SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, ivspec);
        byte[] original = cipher.doFinal(encrypted);
        return new String(original);
    } catch (Exception ex) {
        Logger.getLogger(Encryption.class.getName()).log(Level.SEVERE, null, ex);
        return "Error";
    }
}

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From source file:ch.newscron.encryption.Encryption.java

/**
 * Given a JSONObject, and maybe an hash, it is encoded and returned as a String.
 * @param inviteData is a JSONObject having the data with the keys "customerId", "rew1", "rew2" and "val"
 * @param md5Hash is a String that substitute the hash computed using md5 algorithm, in case it is not null and not empty
 * @return encoded string //from ww  w .  j av a  2  s . co  m
 */
protected static String encode(JSONObject inviteData, String md5Hash) {

    try {
        //Check in case we want to add a given hash (having at the end a corrupt data)
        if (md5Hash != null && !md5Hash.isEmpty()) {
            //Add md5Hash to JSONObject
            inviteData.put("hash", md5Hash);
        } else {
            return null;
        }

        //Encode inviteData (with hash) JSONObject
        String params = inviteData.toString();
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey,
                new IvParameterSpec(initializationVector.getBytes("UTF-8")));
        return Base64.encodeBase64URLSafeString(cipher.doFinal(params.getBytes())); //to ensure valid URL characters
    } catch (Exception e) {
    }

    return null;
}

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