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:com.tydic.dbp.utils.ThreeDesUtils.java

public static String decryptMode(String srcStr) {
    try {//w w w .  ja va  2  s  .c om
        // ?
        SecretKey deskey = new SecretKeySpec(keyBytes, Algorithm);
        // 
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.DECRYPT_MODE, deskey);
        return new String(c1.doFinal(Hex.decodeHex(srcStr.toCharArray())));
    } catch (java.security.NoSuchAlgorithmException e1) {
        e1.printStackTrace();
    } catch (javax.crypto.NoSuchPaddingException e2) {
        e2.printStackTrace();
    } catch (java.lang.Exception e3) {
        e3.printStackTrace();
    }
    return null;
}

From source file:de.serverfrog.pw.crypt.SerpentUtil.java

public static CipherInputStream getInputStream(InputStream os, Key key) throws IOException {
    try {/*from   w  w w  . j a v a2 s  .com*/
        Cipher instance = Cipher.getInstance("Serpent", "BC");
        instance.init(Cipher.DECRYPT_MODE, key);
        return new CipherInputStream(os, instance);
    } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchProviderException
            | NoSuchPaddingException ex) {
        if (ex.getClass().equals(InvalidKeyException.class)) {
            throw new IOException("Password Wrong");
        }
        Logger.getLogger(SerpentUtil.class.getName()).log(Level.SEVERE, null, ex);
    }
    return null;
}

From source file:love.sola.netsupport.util.RSAUtil.java

public static String decrypt(String encrypted) {
    try {//w ww.  ja  v a2  s.c om
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));
        return new String(original, StandardCharsets.UTF_8);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

From source file:illab.nabal.util.SecurityHelper.java

/**
 * Decrypt a AES-encrypted message./* w  w w.j av a 2  s  . c  o  m*/
 * 
 * @param encrypted
 * @return String
 * @throws Exception
 */
public static String decipher(String encrypted) throws Exception {
    if (StringHelper.isEmpty(encrypted) == false) {
        Cipher cipher = Cipher.getInstance(AES);
        cipher.init(Cipher.DECRYPT_MODE, SYSTEM_SECRET_KEY_SPEC);
        return new String(cipher.doFinal(Base64.decode(encrypted, Base64.DEFAULT)), HTTP.UTF_8);
    } else {
        return null;
    }
}

From source file:com.security.ch08_rsa.RSACoderTextKey.java

/**
 * ?//from w  w w  .  j ava 2s. c  o  m
 *
 * @param data
 *            ?
 * @param key
 *            ?
 * @return byte[] ?
 * @throws Exception
 */
private static byte[] decryptByPrivateKey(byte[] data, byte[] key) throws Exception {

    // ??
    PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(key);

    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

    // ??
    PrivateKey privateKey = keyFactory.generatePrivate(pkcs8KeySpec);

    // ?
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

    cipher.init(Cipher.DECRYPT_MODE, privateKey);

    return cipher.doFinal(data);
}

From source file:com.searchbox.utils.DecryptLicense.java

public static byte[] decrypt(byte[] inpBytes) throws Exception {

    byte[] pkbytes = Base64.decodeBase64(privkey);
    KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
    PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(pkbytes);
    PrivateKey pk = keyFactory.generatePrivate(privateKeySpec);

    Cipher cipher = Cipher.getInstance(xform);
    cipher.init(Cipher.DECRYPT_MODE, pk);
    return cipher.doFinal(inpBytes);
}

From source file:Componentes.EncryptionMD5.java

public static String Desencriptar(String encriptado) {
    System.out.println(encriptado);
    String secretKey = "qualityinfosolutions"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {/*from   w w w.j  a  va 2s .c o m*/
        System.out.println("h");
        byte[] message = Base64.decodeBase64(encriptado.getBytes("utf-8"));
        System.out.println("b");
        MessageDigest md = MessageDigest.getInstance("MD5");
        System.out.println("a");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        System.out.println("c");
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        System.out.println("g");
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        System.out.println("w");
        Cipher decipher = Cipher.getInstance("DESede");
        System.out.println("t");
        decipher.init(Cipher.DECRYPT_MODE, key);
        System.out.println("r");
        System.out.println(Arrays.toString(message));
        byte[] plainText = decipher.doFinal(message);
        System.out.println(Arrays.toString(plainText));
        base64EncryptedString = new String(plainText, "UTF-8");

    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return base64EncryptedString;
}

From source file:com.sirius.utils.encrypt.DESEncryptor.java

@Override
public byte[] decrypt(Object key, byte[] data) throws EncryptException {
    try {/*w w w  . j av  a 2  s.  c o  m*/
        Cipher cipher = Cipher.getInstance(ALGORITHM, security_provider);
        cipher.init(Cipher.DECRYPT_MODE, getKey(key));
        return cipher.doFinal(data);
    } catch (Exception e) {
        throw new EncryptException(e);
    }
}

From source file:com.jsmartframework.web.manager.CsrfEncrypter.java

private static Cipher getDecryptCipher(HttpServletRequest request, String key) throws Exception {
    Cipher decryptCipher = (Cipher) request.getAttribute(REQUEST_CSRF_DECRYPT_CIPHER);
    if (decryptCipher == null) {
        decryptCipher = Cipher.getInstance("AES");
        SecretKey secretKey = new SecretKeySpec(key.getBytes("UTF8"), "AES");
        decryptCipher.init(Cipher.DECRYPT_MODE, secretKey);
        request.setAttribute(REQUEST_CSRF_DECRYPT_CIPHER, decryptCipher);
    }/* w w  w  .j  av  a2  s .co m*/
    return decryptCipher;
}

From source file:com.jsmartframework.web.manager.AuthEncrypter.java

private static Cipher getDecryptCipher(HttpServletRequest request, String key) throws Exception {
    Cipher decryptCipher = (Cipher) request.getAttribute(REQUEST_AUTH_DECRYPT_CIPHER);
    if (decryptCipher == null) {
        decryptCipher = Cipher.getInstance("AES");
        SecretKey secretKey = new SecretKeySpec(key.getBytes("UTF8"), "AES");
        decryptCipher.init(Cipher.DECRYPT_MODE, secretKey);
        request.setAttribute(REQUEST_AUTH_DECRYPT_CIPHER, decryptCipher);
    }/* w ww .j ava2 s  .  c om*/
    return decryptCipher;
}

Example usage for javax.crypto Cipher DECRYPT_MODE

Introduction

Prototype

Document

Usage