Example usage for javax.crypto Cipher init

Introduction

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

Prototype

public final void init(int opmode, Certificate certificate) throws InvalidKeyException

Source Link

Document

Initializes this cipher with the public key from the given certificate.

Usage

From source file:com.jaspersoft.jasperserver.jaxrs.client.core.EncryptionUtils.java

private static String getEncryptedPassword(PublicKey publicKey, String pwd) throws Exception {
    byte[] encryptedUtfPass;
    Cipher enc = Cipher.getInstance("RSA/NONE/NoPadding", new BouncyCastleProvider());
    enc.init(Cipher.ENCRYPT_MODE, publicKey);
    String utfPass = URLEncoder.encode(pwd, CharEncoding.UTF_8);
    encryptedUtfPass = enc.doFinal(utfPass.getBytes());

    return byteArrayToHexString(encryptedUtfPass);
}

From source file:TripleDES.java

/**
 * Use the specified TripleDES key to encrypt bytes from the input stream
 * and write them to the output stream. This method uses CipherOutputStream
 * to perform the encryption and write bytes at the same time.
 *//* w ww .j  ava 2s. c o  m*/
public static void encrypt(SecretKey key, InputStream in, OutputStream out)
        throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IOException {
    // Create and initialize the encryption engine
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.ENCRYPT_MODE, key);

    // Create a special output stream to do the work for us
    CipherOutputStream cos = new CipherOutputStream(out, cipher);

    // Read from the input and write to the encrypting output stream
    byte[] buffer = new byte[2048];
    int bytesRead;
    while ((bytesRead = in.read(buffer)) != -1) {
        cos.write(buffer, 0, bytesRead);
    }
    cos.close();

    // For extra security, don't leave any plaintext hanging around memory.
    java.util.Arrays.fill(buffer, (byte) 0);
}

From source file:com.ec2box.manage.util.EncryptionUtil.java

/**
 * return encrypted value of string//www  .j a  va 2s  .  co  m
 *
 * @param str unencrypted string
 * @return encrypted string
 */
public static String encrypt(String str) {

    String retVal = null;
    if (str != null && str.length() > 0) {
        try {
            Cipher c = Cipher.getInstance("AES");
            c.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "AES"));
            byte[] encVal = c.doFinal(str.getBytes());
            retVal = new String(Base64.encodeBase64(encVal));
        } catch (Exception ex) {
            log.error(ex.toString(), ex);
        }

    }
    return retVal;
}

From source file:encryptdecrypt.util.Security.java

public static String encrypt(String strToEncrypt) {
    try {//  ww w .  j av  a  2 s. c  o m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        return new String(Base64.encodeBase64(cipher.doFinal(strToEncrypt.getBytes())));
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:encryptdecrypt.util.Security.java

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

From source file:com.norbl.util.StringUtil.java

public static String encrypt(SecretKey key, String s) throws Exception {
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] enb = c.doFinal(s.getBytes());
    Base64 b64enc = new Base64();
    return (new String(b64enc.encode(enb)));
}

From source file:com.norbl.util.StringUtil.java

public static String decrypt(SecretKey key, String en) throws Exception {
    Base64 b64enc = new Base64();
    byte[] enb = b64enc.decode(en.getBytes());
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.DECRYPT_MODE, key);
    byte[] denb = c.doFinal(enb);
    return (new String(denb));
}

From source file:ar.gob.ambiente.servicios.gestionpersonas.entidades.util.CriptPass.java

/**
 * Mtodo para encriptar las contraseas/*from  w  w  w  .  ja v  a 2 s  .  c  o m*/
 * @param texto
 * @return 
 */
public static String encriptar(String texto) {

    String secretKey = "zorbazorbas"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {

        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 cipher = Cipher.getInstance("DESede");
        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 (NoSuchAlgorithmException | UnsupportedEncodingException | NoSuchPaddingException
            | InvalidKeyException | IllegalBlockSizeException | BadPaddingException ex) {
        System.out.println(ex.getMessage());
    }
    return base64EncryptedString;
}

From source file:br.com.manish.ahy.kernel.util.HashUtil.java

private static Cipher getCipher(boolean enc)
        throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128);/*  www  . ja  v  a2s .  c o m*/
    SecretKeySpec skeySpec = new SecretKeySpec(getBytes(HEXES2), "AES");
    Cipher cipher = Cipher.getInstance("AES");
    if (enc) {
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
    } else {
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
    }
    return cipher;
}

From source file:ar.gob.ambiente.servicios.gestionpersonas.entidades.util.CriptPass.java

/**
 * Mtodo para desencriptar una contrasea encriptada
 * @param textoEncriptado/*  w w  w.j  a  v a  2  s  . c om*/
 * @return
 * @throws Exception 
 */
public static String desencriptar(String textoEncriptado) throws Exception {

    String secretKey = "zorbazorbas"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {
        byte[] message = Base64.decodeBase64(textoEncriptado.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 (UnsupportedEncodingException | NoSuchAlgorithmException | NoSuchPaddingException
            | InvalidKeyException | IllegalBlockSizeException | BadPaddingException ex) {
        System.out.println(ex.getMessage());
    }
    return base64EncryptedString;
}