Example usage for javax.crypto Cipher DECRYPT

Introduction

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

Prototype

int DECRYPT_MODE

To view the source code for javax.crypto Cipher DECRYPT_MODE.

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Document

Constant used to initialize cipher to decryption mode.

Usage

From source file:ec.edu.uce.medicina.seguimiento.util.EncryptionUtility.java

/**
 *Mtodo que permite la desencriptacin de la contrasea
 * @param encrypted//from   w  w  w  .ja  v  a  2  s  . co  m
 * @return
 * @throws Exception
 */
public static String decrypt(String encrypted) throws Exception {
    String key = "02AE31B79CCCB2A3"; //llave
    String iv = "0123456789ABCDEF";
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    byte[] enc = decodeBase64(encrypted);
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] decrypted = cipher.doFinal(enc);
    return new String(decrypted);
}

From source file:com._64bitlabs.util.Encryptors.java

/**
 * Given AES encryption algorithm, decrypts the string value.
 * @param encryptedData/*ww  w .ja v a2 s.  c  o m*/
 * @return decrypted String
 */
public static String decrypt(String encryptedData) {
    Key key = generateKey();
    try {
        Cipher c = Cipher.getInstance(ALGORITHM);
        c.init(Cipher.DECRYPT_MODE, key);

        Base64 dec = new Base64();
        byte[] decodedValue = dec.decode(encryptedData.getBytes());
        byte[] decValue = c.doFinal(decodedValue);

        return new String(decValue);
    } catch (Exception e) {
        return null;
    }
}

From source file:com.liferay.sync.engine.lan.util.LanTokenUtil.java

public static String decryptLanToken(String lanTokenKey, String encryptedToken) throws Exception {

    byte[] bytes = DigestUtils.sha1(lanTokenKey);

    bytes = Arrays.copyOf(bytes, 16);

    Cipher cipher = Cipher.getInstance("AES");

    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(bytes, "AES"));

    return new String(cipher.doFinal(Base64.decodeBase64(encryptedToken)), Charset.forName("UTF-8"));
}

From source file:com.basp.trabajo_al_minuto.model.business.BusinessSecurity.java

/**
 * Se encarga de desencriptar la contrasea ingresada por el usuario *
 *///from   w  w w .  j  a va 2s  .c  om
public static String decrypt(String encryptValue) throws BusinessException {
    String secretKey = "e-business";
    String base64EncryptedString = "";

    try {
        byte[] message = Base64.decodeBase64(encryptValue.getBytes("utf-8"));
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher decipher = Cipher.getInstance("DESede");
        decipher.init(Cipher.DECRYPT_MODE, key);
        byte[] plainText = decipher.doFinal(message);
        base64EncryptedString = new String(plainText, "UTF-8");
    } catch (Exception ex) {
        throw new BusinessException(ex);
    }
    return base64EncryptedString;
}

From source file:info.bonjean.beluga.util.CryptoUtil.java

private static Cipher getCipher(String strKey, boolean encoder) {
    Cipher cipher = null;/*from w w  w. j a  va2 s.co m*/
    if (encoder)
        cipher = encryptCiphers.get(strKey);
    else
        cipher = decryptCiphers.get(strKey);

    if (cipher != null)
        return cipher;

    try {
        SecretKeySpec key = new SecretKeySpec(strKey.getBytes(), "Blowfish");
        cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");
        cipher.init(encoder ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, key);

        if (encoder)
            encryptCiphers.put(strKey, cipher);
        else
            decryptCiphers.put(strKey, cipher);
    } catch (Exception e) {
        log.error(e.getMessage(), e);
    }

    return cipher;
}

From source file:com.lwr.software.reporter.utils.EncryptionUtil.java

public static String decrypt(String encrypted) {
    try {/*w  w  w  .j  a  v a 2  s .  c  o  m*/
        IvParameterSpec iv = new IvParameterSpec(
                DashboardConstants.INIT_VECTOR.getBytes(DashboardConstants.ENCODING));
        SecretKeySpec skeySpec = new SecretKeySpec(
                DashboardConstants.INIT_KEY.getBytes(DashboardConstants.ENCODING),
                DashboardConstants.ALGORITHM);
        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.kylinolap.rest.security.PasswordPlaceholderConfigurer.java

public static String decrypt(String strToDecrypt) {
    try {//w ww  .  j ava  2s  .  c o m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        final String decryptedString = new String(cipher.doFinal(Base64.decodeBase64(strToDecrypt)));
        return decryptedString;
    } catch (Exception e) {
    }
    return null;
}

From source file:com.netsteadfast.greenstep.util.EncryptorUtils.java

public static String decrypt(String key1, String iv1, String encrypted) {
    try {/* www  .  ja  v  a2s. c  o  m*/
        IvParameterSpec iv = new IvParameterSpec(iv1.getBytes(Constants.BASE_ENCODING));
        SecretKeySpec skeySpec = new SecretKeySpec(key1.getBytes(Constants.BASE_ENCODING), "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:D_common.E_ncript.java

public static byte[] decrypt(byte[] data, String keyStr) {
    try {//from   ww  w.j  a v a2 s  .  com
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
        final SecretKeySpec secretKey = new SecretKeySpec(makeAESKey(keyStr), "AES");
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        return cipher.doFinal(data);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:com.zf.decipher.DataEn.java

private static byte[] decrypt(byte[] data) throws Exception {
    if (null == secretKey) {
        throw new SecurityException("secretKey is null");
    }/*  w ww .j a va2  s.c om*/
    Cipher cipher = Cipher.getInstance(secretKey.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, secretKey);
    return cipher.doFinal(data);
}

Example usage for javax.crypto Cipher DECRYPT_MODE

Introduction

Prototype

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Usage