Method join

security/src/main/java/pro/tools/security/sm/SM2.java:82–94

字节数组拼接 @param params @return

(byte[]... params)

     * @return
     */
    private static byte[] join(byte[]... params) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] res = null;
        try {
            for (int i = 0; i < params.length; i++) {
                baos.write(params[i]);
            }
            res = baos.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return res;
    }

    /**
     * sm3摘要