AES加密

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AES加密

2017-01-11 16:35:45 231 0 0

akiragatsu

/**
     * 解密
     *
     * @param sSrc
     * @param key
     * @param ivs
     * @return
     */
    public static String decrypt(String sSrc, String key, String ivs) {
        try {
            byte[] raw = key.getBytes("ASCII");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance(CipherMode);
            IvParameterSpec iv = new IvParameterSpec(ivs.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
            byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密
            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original, "utf-8");
            return originalString;
        } catch (Exception ex) {
            Log.e("AES", "解密异常：" + ex.getMessage());
            return null;
        }
    }
    
    
    /**
     * 加密
     *
     * @param encData
     * @param secretKey
     * @param vector
     * @return
     */
    public static String Encrypt(String encData, String secretKey, String vector) {
        try {
            if (secretKey == null) {
                return null;
            }
            if (secretKey.length() != 16) {
                return null;
            }
            Cipher cipher = Cipher.getInstance(CipherMode);
            byte[] raw = secretKey.getBytes();
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
            byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8"));
            return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。
        } catch (Exception ex) {
            Log.e("AES", "加密异常：" + ex.getMessage());
            return null;
        }
    }

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