Example usage for javax.crypto Cipher getInstance

List of usage examples for javax.crypto Cipher getInstance

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Introduction

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

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException

Source Link

Document

Returns a Cipher object that implements the specified transformation.

Usage

From source file:com.jopss.logico.negocio.util.CriptoUtils.java

public static String desEncode(String texto, String chave) {
    Cipher ecipher;/*w  ww .ja v  a 2  s  . co m*/
    SecretKey key;
    String encod = null;
    try {
        key = new SecretKeySpec(chave.getBytes("UTF-8"), 0, 8, "DES");
        ecipher = Cipher.getInstance("DES");
        ecipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] utf8 = texto.getBytes("UTF8");
        byte[] crip = ecipher.doFinal(utf8);
        encod = new String(Hex.encodeHex(crip));

    } catch (Exception e) {
        log.error(e);
    }

    return encod;
}

From source file:Main.java

public static byte[] getRSAEncryptedData(byte[] dataWithHash) {
    BigInteger modulus = new BigInteger(
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
            16);/*from   w  ww . jav  a 2s  .co  m*/
    BigInteger pubExp = new BigInteger("010001", 16);

    KeyFactory keyFactory = null;
    try {
        keyFactory = KeyFactory.getInstance("RSA");
        RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(modulus, pubExp);
        RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(pubKeySpec);

        Cipher cipher = Cipher.getInstance("RSA/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] cipherData = cipher.doFinal(dataWithHash);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (InvalidKeyException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (BadPaddingException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (InvalidKeySpecException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (NoSuchPaddingException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    }
    return null;
}

From source file:com.app.utils.StringEncrypt.java

/**
 * Funcin de tipo String que recibe una llave (key), un vector de inicializacin (iv)
 * y el texto que se desea cifrar//w  w  w .jav a 2  s.co  m
 * @param key la llave en tipo String a utilizar
 * @param iv el vector de inicializacin a utilizar
 * @param cleartext el texto sin cifrar a encriptar
 * @return el texto cifrado en modo String
 * @throws Exception puede devolver excepciones de los siguientes tipos: NoSuchAlgorithmException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, NoSuchPaddingException
 */
public static String encrypt(String key, String iv, String cleartext) throws Exception {
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] encrypted = cipher.doFinal(cleartext.getBytes());
    return new String(encodeBase64(encrypted));
}

From source file:com.formatAdmin.utils.UtilsSecurity.java

public static String cifrarMD5(String texto) {
    String base64EncryptedString = "";
    try {//from w  ww  .j av  a 2s .  c om
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(SECRET_MD5_KEY.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

        SecretKey key = new SecretKeySpec(keyBytes, ENCRYPT_ALGORITHM);
        Cipher cipher = Cipher.getInstance(ENCRYPT_ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);

    } catch (UnsupportedEncodingException | InvalidKeyException | NoSuchAlgorithmException | BadPaddingException
            | IllegalBlockSizeException | NoSuchPaddingException ex) {
    }
    return base64EncryptedString;
}

From source file:Main.java

public static String decryp(String key, String str) throws java.io.UnsupportedEncodingException,
        NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
        InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
    String aesKey;/*from  www .  ja va2s  . c om*/
    aesKey = key.substring(0, 16);
    Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
    c.init(Cipher.DECRYPT_MODE, AESkey(key), new IvParameterSpec(aesKey.getBytes("UTF-8")));

    byte[] byteStr = Base64.decode(str.getBytes(), 0);
    String deStr = new String(c.doFinal(byteStr), "UTF-8");

    return deStr;
}

From source file:Main.java

public static String encrypt(String key, String str) throws java.io.UnsupportedEncodingException,
        NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
        InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
    String aesKey;/*w  ww. j av  a  2 s . co m*/
    aesKey = key.substring(0, 16);
    Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
    c.init(Cipher.ENCRYPT_MODE, AESkey(key), new IvParameterSpec(aesKey.getBytes()));

    byte[] encrypted = c.doFinal(str.getBytes("UTF-8"));
    String enStr = new String(Base64.encodeToString(encrypted, 0));

    return enStr;
}

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

public static String encrypt(String value) {
    try {//from ww w . ja va 2s.  c  om
        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.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(value.getBytes());
        return Base64.encodeBase64String(encrypted);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

From source file:Logic.security.java

public static String symmetricDecrypt(String text, String secretKey) {
    Cipher cipher;//from   w w w.  ja  va2 s .c  o  m
    String encryptedString;
    byte[] encryptText = null;
    byte[] raw;
    SecretKeySpec skeySpec;
    try {
        raw = Base64.decodeBase64(secretKey);
        skeySpec = new SecretKeySpec(raw, "AES");
        encryptText = Base64.decodeBase64(text);
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        encryptedString = new String(cipher.doFinal(encryptText));
    } catch (Exception e) {
        e.printStackTrace();
        return "Error";
    }
    return encryptedString;
}

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

public static String encrypt(String key1, String iv1, String value) {
    try {//from   w  w  w .  j a v a  2s .co  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.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(value.getBytes());
        //System.out.println("encrypted string:" + Base64.encodeBase64String(encrypted));
        return Base64.encodeBase64String(encrypted);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

From source file:com.hp.application.automation.tools.EncryptionUtils.java

public static String Decrypt(String text, String key) throws Exception {

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] keyBytes = new byte[16];
    byte[] b = key.getBytes("UTF-8");
    int len = b.length;
    if (len > keyBytes.length)
        len = keyBytes.length;//from w w w .j  a  va2  s  .co m
    System.arraycopy(b, 0, keyBytes, 0, len);
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
    cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
    byte[] results = cipher.doFinal(Base64.decodeBase64(text));

    return new String(results, "UTF-8");
}