android Rsa加密 与 openssl库互通

/** *加密的方法   key 是公钥string */public  static String encrypt(String source,String key) {    String epStr="";    try{        LogUtil.e("PUCLIC_KEY:index",String.valueOf(key.indexOf("\n-----END PUBLIC KEY-----")));        String PUCLIC_KEY =key.substring(27,key.indexOf("\n-----END PUBLIC KEY-----"));        LogUtil.e("PUCLIC_KEY:",PUCLIC_KEY);        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");        cipher.init(Cipher.ENCRYPT_MODE, loadPublicKey(PUCLIC_KEY));        byte[] sbt = source.getBytes("UTF-8");        byte[] output = cipher.doFinal(sbt);        epStr =  Base64Util.encode(output);        LogUtil.e("PUCLIC_KEY+encrypt:",epStr);    }catch (Exception e){        System.out.println(e.getMessage());    }    return epStr;}/** * 从字符串中加载公钥 * * @param publicKeyStr *            公钥数据字符串 * @throws Exception   *             加载公钥时产生的异常 */public static Key loadPublicKey(String publicKeyStr) throws Exception{    try    {        byte[] buffer = Base64Util.decode(publicKeyStr);        KeyFactory keyFactory = KeyFactory.getInstance("RSA", new BouncyCastleProvider());        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(buffer);        return (RSAPublicKey) keyFactory.generatePublic(keySpec);    } catch (NoSuchAlgorithmException e)    {        throw new Exception("无此算法");    } catch (InvalidKeySpecException e)    {        throw new Exception("公钥非法");    } catch (NullPointerException e)    {        throw new Exception("公钥数据为空");    }}