Example usage for javax.crypto Cipher doFinal

Introduction

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

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

From source file:cn.lynx.emi.license.ViewLicense.java

private static final String _decrypt(String data) {
    byte[] corekey = Base64.decodeBase64(LICENSE_CORE_KEY);
    byte[] rawData = Base64.decodeBase64(data);

    X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(corekey);
    try {//from   w  ww  . ja v  a 2s  .co  m
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        Key publicKey = keyFactory.generatePublic(x509EncodedKeySpec);

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, publicKey);

        return new String(cipher.doFinal(rawData), "UTF-8");
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

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

public static String encrypt(String key1, String iv1, String value) {
    try {//  w  w  w . j  a  va  2s .  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.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.lecaddyfute.utils.security.AESCrypto.java

public static String encrypt1(String Data) throws Exception {
    KeyGenerator keyGen = KeyGenerator.getInstance(ALGO);
    keyGen.init(128);/*from   www  .  ja v a  2  s .  c om*/
    SecretKey key = keyGen.generateKey();
    System.out.println("Generated key: " + key);
    Cipher c = Cipher.getInstance(ALGO);
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encVal = c.doFinal(Data.getBytes("UTF8"));

    String encryptedValue = ConvertionHelper.bytesToHex(encVal);
    //        String encryptedValue = new String(Base64.encodeBase64(encVal));
    return encryptedValue;
}

From source file:com.bytecode.util.Crypto.java

private static Key generateKey(String keystring, int bits) throws Exception {
    byte[] keyBytes = new byte[bits];
    byte[] key = new byte[bits];
    for (int i = 0; i < bits; i++) {
        keyBytes[i] = (byte) keystring.codePointAt(i);
    }//from w ww. j a  va  2  s .com
    SecretKey secretKey = new SecretKeySpec(keyBytes, "AES");
    Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    key = cipher.doFinal(keyBytes);
    for (int i = 0; i < bits - 16; i++) {
        key[16 + i] = key[i];
    }

    return new SecretKeySpec(key, "AES");
}

From source file:Main.java

private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
    byte[] decrypted = cipher.doFinal(encrypted);
    return decrypted;
}

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

private static byte[] encrypt(byte[] data) throws Exception {
    if (null == secretKey) {
        throw new SecurityException("secretKey is null");
    }// w  w w  .  ja  v a2  s .co  m
    Cipher cipher = Cipher.getInstance(secretKey.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    return cipher.doFinal(data);
}

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");
    }/*from   w  ww .  j  av  a2s.  c o  m*/
    Cipher cipher = Cipher.getInstance(secretKey.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, secretKey);
    return cipher.doFinal(data);
}

From source file:com.sds.acube.ndisc.xnapi.XNApiDesCipher.java

/**
 * //from w w w .  jav a  2  s .c  om
 * 
 * @param data  ?
 * @return  ?
 */
public static String decrypt(String data) {
    try {
        Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, getKey());
        byte d[] = cipher.doFinal(Base64.decodeBase64(data.getBytes()));
        return new String(d);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:com.sds.acube.ndisc.xnapi.XNApiDesCipher.java

/**
 * //from   w w  w.  j  a va 2  s  . c  o m
 * 
 * @param data  ?
 * @return  ?
 */
public static String encrypt(String data) {
    try {
        Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, getKey());
        byte e[] = cipher.doFinal(data.getBytes());
        return Base64.encodeBase64String(e);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static String decode(String key, String ciphertext) throws Exception {
    byte[] bs = parseHexStr2Byte(ciphertext);
    IvParameterSpec ivSpec = new IvParameterSpec(HEX.getBytes());
    SecretKeySpec secretKeySpec = createKey(key);
    Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
    c.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
    return new String(c.doFinal(bs), "UTF-8");
}