Example usage for javax.crypto Cipher doFinal

List of usage examples for javax.crypto Cipher doFinal

  1. HOME
  2. Java
  3. javax
  4. javax.crypto.*
  5. Cipher
  6. 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:Main.java

private static byte[] getDesCode(Context mContext, byte[] byteD) {
    Cipher cipher;
    byte[] byteFina = null;
    try {/*from ww  w.ja va 2s  . c  om*/
        cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.DECRYPT_MODE, getKey(mContext));
        byteFina = cipher.doFinal(byteD);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cipher = null;
    }
    return byteFina;
}

From source file:de.fhdo.helper.DES.java

public static String decrypt(String Text) {
    try {//  w  ww  .jav  a 2 s. c o  m
        DESKeySpec keySpec = new DESKeySpec("schluessel_stdrepository15".getBytes("UTF8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        byte[] encrypedPwdBytes = Base64.decodeBase64(Text);
        Cipher cipher = Cipher.getInstance("DES");// cipher is not thread safe
        cipher.init(Cipher.DECRYPT_MODE, key);

        byte[] plainTextPwdBytes = (cipher.doFinal(encrypedPwdBytes));

        return new String(plainTextPwdBytes);

    } catch (Exception e) {
        e.printStackTrace();
    }

    return "";
}

From source file:aes_encryption.AES_Encryption.java

public static String encrypt(String strToEncrypt) {
    try {//from  w  w  w.jav a  2  s.com
        Cipher cipher = Cipher.getInstance("AES_Encryption/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        setEncryptedString(Base64.encodeBase64String(cipher.doFinal(strToEncrypt.getBytes("UTF-8"))));
    } catch (Exception e) {
        System.out.println("Error while encrypting: " + e.toString());
    }
    return null;
}

From source file:com.rdonasco.security.utils.EncryptionUtil.java

public static String encryptWithPassword(String stringToEncrypt, String password) throws Exception {
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), SALT, COUNT);
    SecretKey pbeKey = getKeyFactory().generateSecret(pbeKeySpec);
    Cipher pbeCipher = Cipher.getInstance(CIPHER_KEY_SPEC);
    pbeCipher.init(Cipher.ENCRYPT_MODE, pbeKey, PBE_PARAM_SPEC);
    byte[] encryptedBytes = pbeCipher.doFinal(stringToEncrypt.getBytes());
    return Base64.encodeBase64String(encryptedBytes);
}

From source file:com.rdonasco.security.utils.EncryptionUtil.java

public static String decryptWithPassword(String encryptedString, String password) throws Exception {
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), SALT, COUNT);
    SecretKey pbeKey = getKeyFactory().generateSecret(pbeKeySpec);
    Cipher pbeCipher = Cipher.getInstance(CIPHER_KEY_SPEC);
    pbeCipher.init(Cipher.DECRYPT_MODE, pbeKey, PBE_PARAM_SPEC);
    byte[] decryptedBytes = pbeCipher.doFinal(Base64.decodeBase64(encryptedString));
    return new String(decryptedBytes);
}

From source file:de.taimos.dvalin.interconnect.model.MessageCryptoUtil.java

/**
 *
 * @param data the data to encrypt/*ww w . java 2  s.c  om*/
 * @return the encrypted BASE64 data
 * @throws CryptoException on encryption error
 */
public static String crypt(final String data) throws CryptoException {
    if (data == null) {
        return null;
    }

    try {
        final Cipher cipher = MessageCryptoUtil.getCipher(Cipher.ENCRYPT_MODE);
        final byte[] encrypted = cipher.doFinal(data.getBytes(Charset.forName("UTF-8")));
        return Base64.encodeBase64String(encrypted);
    } catch (final Exception e) {
        throw new CryptoException("Encryption of data failed!", e);
    }
}

From source file:io.kahu.hawaii.util.encryption.CryptoUtil.java

public static String encrypt(String unencrypted, String key, String initVector) throws ServerException {
    try {//from w ww.  ja  va  2s. c  om
        Cipher cipher = initCipher(Cipher.ENCRYPT_MODE, key, initVector);

        byte[] encrypted = cipher.doFinal(unencrypted.getBytes());
        return Base64.encodeBase64String(encrypted);
    } catch (GeneralSecurityException e) {
        throw new ServerException(ServerError.ENCRYPTION, e);
    }
}

From source file:io.kahu.hawaii.util.encryption.CryptoUtil.java

public static String decrypt(String encrypted, String key, String initVector) throws ServerException {
    try {/*from  w ww .  j  av a2  s. c  om*/
        Cipher cipher = initCipher(Cipher.DECRYPT_MODE, key, initVector);

        byte[] decrypted = cipher.doFinal(Base64.decodeBase64(encrypted));

        return new String(decrypted);
    } catch (GeneralSecurityException e) {
        throw new ServerException(ServerError.ENCRYPTION, e);
    }
}

From source file:Main.java

public static String encryption(String string) throws Exception {
    // TODO Auto-generated method stub

    //generate symmetric key
    KeyGenerator keygt = KeyGenerator.getInstance("AES");
    keygt.init(128);//from w w  w .  ja  v a  2 s. c om
    SecretKey symkey = keygt.generateKey();

    //get it encoded
    byte[] aes_ba = symkey.getEncoded();

    //create cipher
    SecretKeySpec skeySpec = new SecretKeySpec(aes_ba, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

    //encryption
    byte[] EncSymbyteArray = cipher.doFinal(string.getBytes());

    //encrypt symKey with PublicKey
    //        Key pubKey = getPublicKey();

    Key pubKey = publicKey;

    //RSA cipher
    Cipher cipherAsm = Cipher.getInstance("RSA", "BC");
    cipherAsm.init(Cipher.ENCRYPT_MODE, pubKey);

    //RSA encryption
    byte[] asymEncsymKey = cipherAsm.doFinal(aes_ba);

    //           File f3 = new File(BASE_PATH,"enc.txt");
    //           File f3key = new File(BASE_PATH,"enckey.txt");
    //           File f3file = new File(BASE_PATH,"encfile.txt");
    //           writeToFile2(f3,f3key,f3file, asymEncsymKey, EncSymbyteArray);

    //byte != new String
    //return new String(byteMerger(asymEncsymKey, EncSymbyteArray));
    return Base64.encodeToString(byteMerger(asymEncsymKey, EncSymbyteArray), Base64.DEFAULT);

}

From source file:com.aast.encrypt.EncryptManager.java

public static String decryptAES(String key, String encrypted) {
    try {/*www  . j  a va  2s  .c o m*/
        byte[] keyBytes = getKeyFromString(key);
        IvParameterSpec iv = new IvParameterSpec(keyBytes);
        SecretKeySpec skeySpec = new SecretKeySpec(keyBytes, "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

        byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));

        return new String(original);
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}