Example usage for javax.crypto Cipher doFinal

List of usage examples for javax.crypto Cipher doFinal

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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:com.imaginary.home.cloud.Configuration.java

static public @Nonnull String decrypt(@Nonnull String keySalt, @Nonnull String value) {
    try {/*www .ja  va 2 s.  com*/
        SecretKeySpec spec = new SecretKeySpec(getConfiguration().getCustomSalt(keySalt), "AES");
        Cipher cipher = Cipher.getInstance("AES");

        cipher.init(Cipher.DECRYPT_MODE, spec);

        byte[] b64 = value.getBytes("utf-8");
        byte[] raw = Base64.decodeBase64(b64);
        byte[] decrypted = cipher.doFinal(raw);
        return new String(decrypted, "utf-8");
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:com.aurel.track.report.query.ReportQueryBL.java

private static String encrypt(String clearText, char[] password) {
    // Create PBE parameter set
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, count);
    byte[] ciphertext = { 0 };

    PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
    try {//from  ww  w. j  a va  2s .c  om
        SecretKeyFactory keyFac = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey pbeKey = keyFac.generateSecret(pbeKeySpec);

        // Create PBE Cipher
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");

        // Initialize PBE Cipher with key and parameters
        pbeCipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParamSpec);

        // Encrypt the cleartext
        ciphertext = pbeCipher.doFinal(clearText.getBytes());
    } catch (Exception e) {
        LOGGER.error(ExceptionUtils.getStackTrace(e));
    }
    return new String(Base64.encodeBase64(ciphertext));
}

From source file:com.aurel.track.admin.customize.category.filter.execute.ReportQueryBL.java

private static String encrypt(String clearText, char[] password) {
    // Create PBE parameter set
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, count);
    byte[] ciphertext = { 0 };

    PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
    try {/*from   ww w . j  av a  2 s.com*/
        SecretKeyFactory keyFac = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey pbeKey = keyFac.generateSecret(pbeKeySpec);

        // Create PBE Cipher
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");

        // Initialize PBE Cipher with key and parameters
        pbeCipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParamSpec);

        // Encrypt the cleartext
        ciphertext = pbeCipher.doFinal(clearText.getBytes());
    } catch (Exception e) {
        LOGGER.debug(ExceptionUtils.getStackTrace(e), e);
    }
    return new String(Base64.encodeBase64(ciphertext));
}

From source file:com.myapp.common.AES4MEncrypt.java

/**
 * /*from www  . j  a  va 2  s  .  c  o m*/
 * 
 * @param sSrc ?
 * @param sKey KEY
 * @return
 * @throws Exception
 * @author cdduqiang
 * @date 201443
 */
public static String decrypt(String sSrc, String sKey) throws Exception {
    if (sKey == null) {
        log.error("Decrypt Key ??");
        throw new Exception("Decrypt Key ??");
    }

    byte[] raw = hex2byte(sKey);
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
    byte[] encrypted1 = hex2byte(sSrc);

    byte[] original = cipher.doFinal(encrypted1);
    return new String(original, ENCODING);// anslBytes2String(original);
}

From source file:com.qubit.solution.fenixedu.bennu.webservices.services.client.WebServiceClientHandler.java

public static String cypher(byte[] sessionKey, String informationToCipher) {
    Cipher cipher;
    try {/*from  w w w  .ja  v  a 2  s . c  o  m*/
        cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(sessionKey, "AES"));
        byte[] cipherData = cipher.doFinal(informationToCipher.getBytes("UTF-8"));
        return Base64.encodeBase64String(cipherData);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:edu.hku.sdb.udf.util.UDFHandler.java

private static boolean search(byte[] encrypted, String keyword, SecretKey prkey) {
    byte[] keywordbyte = keyword.getBytes();
    if (keywordbyte.length != encrypted.length) {
        return false;
    }//  w w w  .  j a  v  a 2s  .com
    byte[] diff1 = new byte[keywordbyte.length - 1];
    for (int i = 0; i < diff1.length; i++) {
        diff1[i] = (byte) (encrypted[i] ^ keywordbyte[i]);
    }
    byte diff2 = (byte) (encrypted[diff1.length] ^ keywordbyte[diff1.length]);
    // get diff = word xor encrypted
    // if it is a match, first part of diff generates second part of diff using pseudo random function

    try {
        // pseudorandom cipher
        Cipher prCipher = Cipher.getInstance(SCHEME);
        prCipher.init(Cipher.ENCRYPT_MODE, prkey);

        // si is chopped with the desired length

        byte[] fksi = prCipher.doFinal(diff1);
        // fksi is F_k(S_i) in the searchable encryption
        // we use the same AES cipher for simplicity

        return fksi[0] == diff2;
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (BadPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return false;
}

From source file:com.jk.security.JKEncDec.java

/**
 * Encrypt./*ww w. j a  v a  2  s .c  om*/
 *
 * @param plainText
 *            the plain text
 * @return the string
 */
public static String encrypt(String plainText) {
    try {
        plainText = fixText(plainText);
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE");
        SecretKeySpec key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES");
        cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(IV.getBytes("UTF-8")));
        return toString(cipher.doFinal(plainText.getBytes("UTF-8")));
    } catch (Exception e) {
        throw new JKSecurityException(e);
    }
}

From source file:com.screenslicer.common.Crypto.java

private static String encodeHelper(String plainText, String encryptionKey) {
    if (plainText == null || encryptionKey == null) {
        return null;
    }// w ww  . ja v a2  s  .c  o m
    try {
        Cipher aesCipher = Cipher.getInstance("AES");
        aesCipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(DigestUtils.sha256(encryptionKey), "AES"));
        return Base64.encodeBase64String(aesCipher.doFinal(plainText.getBytes("utf-8")));
    } catch (Exception e) {
        return null;
    }
}

From source file:com.jk.security.JKEncDec.java

/**
 * Decrypt.//ww  w. ja  va  2s.c o  m
 *
 * @param cipherText
 *            the cipher text
 * @return the string
 */
public static String decrypt(String cipherText) {
    try {
        byte[] cipherBytes = toBytes(cipherText);
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE");
        SecretKeySpec key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES");
        cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(IV.getBytes("UTF-8")));
        return new String(cipher.doFinal(cipherBytes), "UTF-8").trim();
    } catch (Exception e) {
        throw new JKSecurityException(e);
    }
}

From source file:com.liferay.sync.engine.util.Encryptor.java

public static String decrypt(String value) throws Exception {
    if (value == null) {
        return "";
    }//  ww  w. ja  va  2 s . c  om

    SecretKey secretKey = new SecretKeySpec(_PASSWORD, _ALGORITHM);

    Cipher cipher = Cipher.getInstance(_ALGORITHM);

    cipher.init(Cipher.DECRYPT_MODE, secretKey);

    String decryptedValue = value;

    for (int i = 0; i < _ITERATIONS; i++) {
        byte[] decodedBytes = Base64.decodeBase64(decryptedValue);

        byte[] decryptedBytes = cipher.doFinal(decodedBytes);

        decryptedValue = new String(decryptedBytes, _UTF8_CHARSET).substring(_SALT_LENGTH);
    }

    return decryptedValue;
}