baggage.hypertoolkit.security.CipherText.java Source code

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Here is the source code for baggage.hypertoolkit.security.CipherText.java

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/*
 * The MIT License
 *
 * Copyright (c) 2010 Fabrice Medio
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package baggage.hypertoolkit.security;

import org.apache.commons.codec.binary.Base64;

import javax.crypto.*;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

public class CipherText {
    private byte[] bytes;

    public CipherText(byte[] bytes) {
        this.bytes = bytes;
    }

    public CipherText(String base64) {
        this.bytes = Base64.decodeBase64(base64);
    }

    public String base64() {
        return Base64.encodeBase64URLSafeString(bytes).trim();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        CipherText that = (CipherText) o;

        if (!Arrays.equals(bytes, that.bytes))
            return false;

        return true;
    }

    @Override
    public int hashCode() {
        return bytes != null ? Arrays.hashCode(bytes) : 0;
    }

    public ClearText decrypt(SecretKey secretKey) throws MessageIntegrityException {
        try {
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, secretKey);
            return new ClearText(cipher.doFinal(bytes));
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        } catch (NoSuchPaddingException e) {
            throw new RuntimeException(e);
        } catch (InvalidKeyException e) {
            throw new RuntimeException(e);
        } catch (IllegalBlockSizeException e) {
            throw new MessageIntegrityException();
        } catch (BadPaddingException e) {
            throw new MessageIntegrityException();
        }
    }
}