v一、前言
由于之前写过的一片文章 （java接口签名(Signature)实现方案 ）收获了很多好评，此次来说一下另一种简单粗暴的签名方案。相对于之前的签名方案，对body、paramenter、path variable的获取都做了简化的处理。也就是说这种方式针所有数据进行了签名，并不能指定某些数据进行签名。
v二、签名规则
1、线下分配appid和appsecret，针对不同的调用方分配不同的appid和appsecret
2、加入timestamp（时间戳），10分钟内数据有效
3、加入流水号nonce（防止重复提交），至少为10位。针对查询接口，流水号只用于日志落地，便于后期日志核查。 针对办理类接口需校验流水号在有效期内的唯一性，以避免重复请求。
4、加入signature，所有数据的签名信息。
以上红色字段放在请求头中。
v三、签名的生成
signature 字段生成规则如下。
v 1、数据部分
Path Variable：按照path中的字典顺序将所有value进行拼接
Parameter：按照key=values（多个value按照字典顺序拼接）字典顺序进行拼接
Body：从request inputstream中获取保存为String形式
如果存在多种数据形式，则按照body、parameter、path variable的顺序进行再拼接，得到所有数据的拼接值。
上述拼接的值记作 Y。
v 2、请求头部分
X=”appid=xxxnonce=xxxtimestamp=xxx”
v 3、生成签名
最终拼接值=XY
最后将最终拼接值按照如下方法进行加密得到签名。
signature=org.apache.commons.codec.digest.HmacUtils.AesEncodeUtil(app secret, 拼接的值);
v四、签名算法实现
注：省去了X=”appid=xxxnonce=xxxtimestamp=xxx”这部分。
v 1、自定义Request对象
为什么要自定义request对象，因为我们要获取request inputstream（默认只能获取一次）。
public class BufferedHttpServletRequest extends HttpServletRequestWrapper { private ByteBuf buffer; private final AtomicBoolean isCached = new AtomicBoolean(); public BufferedHttpServletRequest(HttpServletRequest request, int initialCapacity) { super(request); int contentLength = request.getContentLength(); int min = Math.min(initialCapacity, contentLength); if (min < 0) {
buffer = Unpooled.buffer(0);
} else {
buffer = Unpooled.buffer(min, contentLength);
}
}
@Override public ServletInputStream getInputStream() throws IOException { //Only returning data from buffer if it is readonly, which means the underlying stream is EOF or closed.
if (isCached.get()) { return new NettyServletInputStream(buffer);
} return new ContentCachingInputStream(super.getInputStream());
} public void release() {
buffer.release();
} private class ContentCachingInputStream extends ServletInputStream { private final ServletInputStream is; public ContentCachingInputStream(ServletInputStream is) { this.is = is;
}
@Override public int read() throws IOException { int ch = this.is.read(); if (ch != -1) { //Stream is EOF, set this buffer to readonly state buffer.writeByte(ch);
} else {
isCached.compareAndSet(false, true);
} return ch;
}
@Override public void close() throws IOException { //Stream is closed, set this buffer to readonly state
try {
is.close();
} finally {
isCached.compareAndSet(false, true);
}
}
@Override public boolean isFinished() { throw new UnsupportedOperationException("Not yet implemented!");
}
@Override public boolean isReady() { throw new UnsupportedOperationException("Not yet implemented!");
}
@Override public void setReadListener(ReadListener readListener) { throw new UnsupportedOperationException("Not yet implemented!");
}
}
}
替换默认的request对象
@Configurationpublic class FilterConfig {
@Bean public RequestCachingFilter requestCachingFilter() { return new RequestCachingFilter();
}
@Bean public FilterRegistrationBean requestCachingFilterRegistration(
RequestCachingFilter requestCachingFilter) {
FilterRegistrationBean bean = new FilterRegistrationBean(requestCachingFilter);
bean.setOrder(1); return bean;
}
}
public class RequestCachingFilter extends OncePerRequestFilter { private static Logger LOGGER = LoggerFactory.getLogger(RequestCachingFilter.class);
@Override protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException { boolean isFirstRequest = !isAsyncDispatch(request);
HttpServletRequest requestToUse = request; if (isFirstRequest && !(request instanceof BufferedHttpServletRequest)) {
requestToUse = new BufferedHttpServletRequest(request, 1024);
} try {
filterChain.doFilter(requestToUse, response);
} catch (Exception e) {
LOGGER.error("RequestCachingFilter>>>>>>>>>", e);
} finally { this.printRequest(requestToUse); if (requestToUse instanceof BufferedHttpServletRequest) {
((BufferedHttpServletRequest) requestToUse).release();
}
}
} private void printRequest(HttpServletRequest request) {
String body = StringUtils.EMPTY; try { if (request instanceof BufferedHttpServletRequest) {
body = IOUtils.toString(request.getInputStream(), StandardCharsets.UTF_8);
}
} catch (IOException e) {
LOGGER.error("printRequest 获取body异常...", e);
}
JSONObject requestJ = new JSONObject();
JSONObject headers = new JSONObject();
Collections.list(request.getHeaderNames())
.stream()
.forEach(name -> headers.put(name, request.getHeader(name)));
requestJ.put("headers", headers);
requestJ.put("parameters", request.getParameterMap());
requestJ.put("body", body);
requestJ.put("remote-user", request.getRemoteUser());
requestJ.put("remote-addr", request.getRemoteAddr());
requestJ.put("remote-host", request.getRemoteHost());
requestJ.put("remote-port", request.getRemotePort());
requestJ.put("uri", request.getRequestURI());
requestJ.put("url", request.getRequestURL());
requestJ.put("servlet-path", request.getServletPath());
requestJ.put("method", request.getMethod());
requestJ.put("query", request.getQueryString());
requestJ.put("path-info", request.getPathInfo());
requestJ.put("context-path", request.getContextPath());
LOGGER.info("Request-Info: " + JSON.toJSONString(requestJ, SerializerFeature.PrettyFormat));
}
}
v 2、签名切面
@Aspect
@Componentpublic class SignatureAspect { private static final Logger LOGGER = LoggerFactory.getLogger(StringUtils.class);
@Around("execution(* com..controller..*.*(..)) " +
"&& (@annotation(org.springframework.web.bind.annotation.RequestMapping)" +
"|| @annotation(org.springframework.web.bind.annotation.GetMapping)" +
"|| @annotation(org.springframework.web.bind.annotation.PostMapping)" +
"|| @annotation(org.springframework.web.bind.annotation.DeleteMapping)" +
"|| @annotation(org.springframework.web.bind.annotation.PatchMapping))"
) public Object doAround(ProceedingJoinPoint pjp) throws Throwable { try { this.checkSign(); return pjp.proceed();
} catch (Throwable e) {
LOGGER.error("SignatureAspect>>>>>>>>", e); throw e;
}
} private void checkSign() throws Exception {
HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest();
String oldSign = request.getHeader("X-SIGN"); if (StringUtils.isBlank(oldSign)) { throw new RuntimeException("取消签名Header[X-SIGN]信息");
} //获取body（对应@RequestBody）
String body = null; if (request instanceof BufferedHttpServletRequest) {
body = IOUtils.toString(request.getInputStream(), StandardCharsets.UTF_8);
} //获取parameters（对应@RequestParam）
Map<String, String[]> params = null; if (!CollectionUtils.isEmpty(request.getParameterMap())) {
params = request.getParameterMap();
} //获取path variable（对应@PathVariable）
String[] paths = null;
ServletWebRequest webRequest = new ServletWebRequest(request, null);
Map<String, String> uriTemplateVars = (Map<String, String>) webRequest.getAttribute(
HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST); if (!CollectionUtils.isEmpty(uriTemplateVars)) {
paths = uriTemplateVars.values().toArray(new String[]{});
} try {
String newSign = SignUtil.sign(body, params, paths); if (!newSign.equals(oldSign)) { throw new RuntimeException("签名不一致...");
}
} catch (Exception e) { throw new RuntimeException("验签出错...", e);
}
}
}
分别获取了request inputstream中的body信息、parameter信息、path variable信息。
v 3、签名核心工具类
public class SignUtil { private static final String DEFAULT_SECRET = "1qaz@WSX#$%&"; public static String sign(String body, Map<String, String[]> params, String[] paths) {
StringBuilder sb = new StringBuilder(); if (StringUtils.isNotBlank(body)) {
sb.append(body).append('#');
} if (!CollectionUtils.isEmpty(params)) {
params.entrySet()
.stream()
.sorted(Map.Entry.comparingByKey())
.forEach(paramEntry -> {
String paramValue = String.join(",", Arrays.stream(paramEntry.getValue()).sorted().toArray(String[]::new));
sb.append(paramEntry.getKey()).append("=").append(paramValue).append('#');
});
} if (ArrayUtils.isNotEmpty(paths)) {
String pathValues = String.join(",", Arrays.stream(paths).sorted().toArray(String[]::new));
sb.append(pathValues);
}
String createSign = HmacUtils.hmacSha256Hex(DEFAULT_SECRET, sb.toString()); return createSign;
} public static void main(String[] args) {
String body = "{\n" +
"\t\"name\": \"hjzgg\",\n" +
"\t\"age\": 26\n" +
"}";
Map<String, String[]> params = new HashMap<>();
params.put("var3", new String[]{"3"});
params.put("var4", new String[]{"4"});
String[] paths = new String[]{"1", "2"};
System.out.println(sign(body, params, paths));
}
}
v五、签名验证
简单写了一个包含body参数，parameter参数，path variable参数的controller
@RestController
@RequestMapping("example")public class ExampleController {
@PostMapping(value = "test/{var1}/{var2}", produces = MediaType.ALL_VALUE) public String myController(@PathVariable String var1
, @PathVariable String var2
, @RequestParam String var3
, @RequestParam String var4
, @RequestBody User user) { return String.join(",", var1, var2, var3, var4, user.toString());
} private static class User { private String name; private int age; public String getName() { return name;
} public void setName(String name) { this.name = name;
} public int getAge() { return age;
} public void setAge(int age) { this.age = age;
}
@Override public String toString() { return new ToStringBuilder(this)
.append("name", name)
.append("age", age)
.toString();
}
}
}
通过 签名核心工具类SignUtil 的main方法生成一个签名，通过如下命令验证
curl -X POST \ 'http://localhost:8080/example/test/1/2?var3=3&var4=4' \ -H 'Content-Type: application/json' \ -H 'X-SIGN: 4955125a3aa2782ab3def51dc958a34ca46e5dbb345d8808590fb53e81cc2687' \ -d '{
"name": "hjzgg", "age": 26}'
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