AES加密在linux上的问题

来源：互联网发布：淘宝刷手小号编辑：程序博客网时间：2024/06/05 01:06

AES加密在Linux上加密和解密都必须加上

  KeyGenerator kgen = KeyGenerator.getInstance("AES");        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");        random.setSeed(encryptKey.getBytes());        kgen.init(128,random);        Cipher cipher = Cipher.getInstance("AES");        cipher.init(Cipher.ENCRYPT_MODE,new SecretKeySpec(kgen.generateKey().getEncoded(),"AES"));

否则，因为持有的random对象不一样，导致每次密钥不一致。

加密工具类：

public class DESUtil {    /**     * base 64 encode     * @param bytes 待编码的byte[]     * @return 编码后的base 64 code     */    public static String base64Encode(byte[] bytes){        return new BASE64Encoder().encode(bytes);    }    /**     * base 64 decode     * @param base64Code 待解码的base 64 code     * @return 解码后的byte[]     * @throws Exception     */    public static byte[] base64Decode(String base64Code) throws IOException {        return StringUtils.isNullOrEmpty(base64Code)? null : new BASE64Decoder().decodeBuffer(base64Code);    }    /**     * 获取byte[]的md5值     * @param bytes byte[]     * @return md5     * @throws Exception     */    public static byte[] md5(byte[] bytes) throws NoSuchAlgorithmException {        MessageDigest md = MessageDigest.getInstance("MD5");        md.update(bytes);        return md.digest();    }    /**     * 获取字符串md5值     * @param msg     * @return md5     * @throws Exception     */    public static byte[] md5(String msg) throws NoSuchAlgorithmException {        return StringUtils.isNullOrEmpty(msg) ? null : md5(msg.getBytes());    }    /**     * 结合base64实现md5加密     * @param msg 待加密字符串     * @return 获取md5后转为base64     * @throws Exception     */    public static String md5Encrypt(String msg) throws NoSuchAlgorithmException {        return StringUtils.isNullOrEmpty(msg) ? null : base64Encode(md5(msg));    }    /**     * AES加密     * @param content 待加密的内容     * @param encryptKey 加密密钥     * @return 加密后的byte[]     * @throws Exception     */    public static byte[] aesEncryptToBytes(String content,String encryptKey) throws Exception {        KeyGenerator kgen = KeyGenerator.getInstance("AES");        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");        random.setSeed(encryptKey.getBytes());        kgen.init(128,random);        Cipher cipher = Cipher.getInstance("AES");        cipher.init(Cipher.ENCRYPT_MODE,new SecretKeySpec(kgen.generateKey().getEncoded(),"AES"));        return cipher.doFinal(content.getBytes("UTF-8"));    }    /**     * AES加密为base 64 code     * @param content 待加密的内容     * @param encryptKey 加密密钥     * @return 加密后的base 64 code     * @throws Exception     */    public static String aesEncrypt(String content,String encryptKey) throws Exception {        return base64Encode(aesEncryptToBytes(content,encryptKey));    }    /**     * AES解密     * @param encryptBytes 待解密的byte[]     * @param decryptKey 解密密钥     * @return 解密后的String     * @throws Exception     */    public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {        KeyGenerator kgen = KeyGenerator.getInstance("AES");        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");        random.setSeed(decryptKey.getBytes());        kgen.init(128, random);        Cipher cipher = Cipher.getInstance("AES");        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));        byte[] decryptBytes = cipher.doFinal(encryptBytes);        return new String(decryptBytes);    }    /**     * 将base 64 code AES解密     * @param encryptStr 待解密的base 64 code     * @param decryptKey 解密密钥     * @return 解密后的string     * @throws Exception     */    public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {        return StringUtils.isNullOrEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);    }}

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