上一篇介绍了客户端认证处理，那是令牌颁发的前提。这篇开始，我们就来研究下令牌颁发。
令牌颁发
授权服务器提供令牌颁发接口（/oauth2/token），由客户端发起请求，授权服务器生成访问令牌（access_token）返回，客户端使用此令牌才能去调用资源服务器的接口。
Spring Authorization Server 目前支持如下三种令牌颁发策略：Authorization Code、Client Credentials、Refresh Token，分别对应 授权码模式、客户端凭证模式、刷新令牌模式。
Authorization Code（授权码模式）
客户端访问授权链接，用户授权，客户端获得授权码code，通过code获取令牌
-
传参
- grant_type：固定值 authorization_code
- code：授权码
-
核心类
- OAuth2AuthorizationCodeAuthenticationConverter
- OAuth2AuthorizationCodeAuthenticationProvider
Client Credentials（客户端凭证模式）
- 传参
- grant_type：固定值 client_credentials
- 核心类
- OAuth2ClientCredentialsAuthenticationConverter
- OAuth2ClientCredentialsAuthenticationProvider
Refresh Token（刷新令牌模式）
当客户端支持刷新令牌时，授权服务器颁发访问令牌(access_token)时会同时颁发刷新令牌(refresh_token)，客户端可以使用刷新令牌重新获取访问令牌。（由于访问令牌时效比较短，刷新令牌时效比较长，通过刷新令牌获取访问令牌，避免多次授权）
- 传参
- grant_type：固定值 refresh_token
- refresh_token：刷新令牌
- 核心类
- OAuth2RefreshTokenAuthenticationConverter
- OAuth2RefreshTokenAuthenticationProvider
OAuth2TokenEndpointFilter
实现令牌颁发功能的拦截器就是 OAuth2TokenEndpointFilter。OAuth2TokenEndpointFilter 会接收通过上文 OAuth2ClientAuthenticationFilter 客户端认证的请求,其核心代码如下：
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
//step1
if (!this.tokenEndpointMatcher.matches(request)) {
filterChain.doFilter(request, response);
return;
}
try {
String[] grantTypes = request.getParameterValues(OAuth2ParameterNames.GRANT_TYPE);
if (grantTypes == null || grantTypes.length != 1) {
throwError(OAuth2ErrorCodes.INVALID_REQUEST, OAuth2ParameterNames.GRANT_TYPE);
}
//step2
Authentication authorizationGrantAuthentication = this.authenticationConverter.convert(request);
if (authorizationGrantAuthentication == null) {
throwError(OAuth2ErrorCodes.UNSUPPORTED_GRANT_TYPE, OAuth2ParameterNames.GRANT_TYPE);
}
if (authorizationGrantAuthentication instanceof AbstractAuthenticationToken) {
((AbstractAuthenticationToken) authorizationGrantAuthentication)
.setDetails(this.authenticationDetailsSource.buildDetails(request));
}
//step3
OAuth2AccessTokenAuthenticationToken accessTokenAuthentication =
(OAuth2AccessTokenAuthenticationToken) this.authenticationManager.authenticate(authorizationGrantAuthentication);
//step4
this.authenticationSuccessHandler.onAuthenticationSuccess(request, response, accessTokenAuthentication);
} catch (OAuth2AuthenticationException ex) {
SecurityContextHolder.clearContext();
this.authenticationFailureHandler.onAuthenticationFailure(request, response, ex);
}
}
step1.判断此次请求是否是 “令牌颁发” 请求，若是，则继续授权模式检验，否则跳过
step2.解析请求中的参数，构建成一个 Authentication（组装登陆认证对象）
step3.认证管理器对 Authentication 进行认证
step4.到这一步说明access_token生成好了， 将access_token和相关信息响应给请求方。
客户端认证 OAuth2ClientAuthenticationFilter 中也正是用的这种实现套路。将不同实现策略抽象为 AuthenticationConverter 和 AuthenticationProvider 接口。每种策略实际上就是一个 AuthenticationConverter 实现类 加上一个 AuthenticationProvider实现类。
组装认证对象
Authentication authorizationGrantAuthentication = this.authenticationConverter.convert(request);
AuthenticationConverter 会根据请求中的参数和授权类型组装成对应的授权认证对象。
image
授权认证调用
OAuth2AccessTokenAuthenticationToken accessTokenAuthentication =
(OAuth2AccessTokenAuthenticationToken) this.authenticationManager.authenticate(authorizationGrantAuthentication);
image
在
OAuth2ResourceOwnerBaseAuthenticationProvider中
image
认证逻辑
Authentication usernamePasswordAuthentication = authenticationManager
.authenticate(usernamePasswordAuthenticationToken);
根据认证方法传入的参数判定进入到AbstractUserDetailsAuthenticationProvider
@Override
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
Assert.isInstanceOf(UsernamePasswordAuthenticationToken.class, authentication,
() -> this.messages.getMessage("AbstractUserDetailsAuthenticationProvider.onlySupports",
"Only UsernamePasswordAuthenticationToken is supported"));
String username = determineUsername(authentication);
boolean cacheWasUsed = true;
UserDetails user = this.userCache.getUserFromCache(username);
if (user == null) {
cacheWasUsed = false;
try {
user = retrieveUser(username, (UsernamePasswordAuthenticationToken) authentication);
}
catch (UsernameNotFoundException ex) {
this.logger.debug("Failed to find user '" + username + "'");
if (!this.hideUserNotFoundExceptions) {
throw ex;
}
throw new BadCredentialsException(this.messages
.getMessage("AbstractUserDetailsAuthenticationProvider.badCredentials", "Bad credentials"));
}
Assert.notNull(user, "retrieveUser returned null - a violation of the interface contract");
}
try {
this.preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user, (UsernamePasswordAuthenticationToken) authentication);
}
catch (AuthenticationException ex) {
if (!cacheWasUsed) {
throw ex;
}
// There was a problem, so try again after checking
// we're using latest data (i.e. not from the cache)
cacheWasUsed = false;
user = retrieveUser(username, (UsernamePasswordAuthenticationToken) authentication);
this.preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user, (UsernamePasswordAuthenticationToken) authentication);
}
this.postAuthenticationChecks.check(user);
if (!cacheWasUsed) {
this.userCache.putUserInCache(user);
}
Object principalToReturn = user;
if (this.forcePrincipalAsString) {
principalToReturn = user.getUsername();
}
return createSuccessAuthentication(principalToReturn, authentication, user);
}
查询用户信息
image
retrieveUser方法
protected abstract UserDetails retrieveUser(String username, UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException;
PigDaoAuthenticationProvider继承了AbstractUserDetailsAuthenticationProvider并重写
retrieveUser方法。返回值为UserDetails。
image
用户密码校验
image
PigDaoAuthenticationProvider继承了AbstractUserDetailsAuthenticationProvider并重写additionalAuthenticationChecks方法。
@Override
@SuppressWarnings("deprecation")
protected void additionalAuthenticationChecks(UserDetails userDetails,
UsernamePasswordAuthenticationToken authentication) throws AuthenticationException {
// app 模式不用校验密码
String grantType = WebUtils.getRequest().get().getParameter(OAuth2ParameterNames.GRANT_TYPE);
if (StrUtil.equals(SecurityConstants.APP, grantType)) {
return;
}
if (authentication.getCredentials() == null) {
this.logger.debug("Failed to authenticate since no credentials provided");
throw new BadCredentialsException(this.messages
.getMessage("AbstractUserDetailsAuthenticationProvider.badCredentials", "Bad credentials"));
}
String presentedPassword = authentication.getCredentials().toString();
if (!this.passwordEncoder.matches(presentedPassword, userDetails.getPassword())) {
this.logger.debug("Failed to authenticate since password does not match stored value");
throw new BadCredentialsException(this.messages
.getMessage("AbstractUserDetailsAuthenticationProvider.badCredentials", "Bad credentials"));
}
}
构建token
认证成功后返回OAuth2ResourceOwnerBaseAuthenticationProvider接着看
image
CustomeOAuth2AccessTokenGenerator实现OAuth2TokenGenerator接口.
Token 存储持久化
image
image
RedisOAuth2AuthorizationService实现OAuth2AuthorizationService
save方法
@Override
public void save(OAuth2Authorization authorization) {
Assert.notNull(authorization, "authorization cannot be null");
if (isState(authorization)) {
String token = authorization.getAttribute("state");
redisTemplate.setValueSerializer(RedisSerializer.java());
redisTemplate.opsForValue().set(buildKey(OAuth2ParameterNames.STATE, token), authorization, TIMEOUT,
TimeUnit.MINUTES);
}
if (isCode(authorization)) {
OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode = authorization
.getToken(OAuth2AuthorizationCode.class);
OAuth2AuthorizationCode authorizationCodeToken = authorizationCode.getToken();
long between = ChronoUnit.MINUTES.between(authorizationCodeToken.getIssuedAt(),
authorizationCodeToken.getExpiresAt());
redisTemplate.setValueSerializer(RedisSerializer.java());
redisTemplate.opsForValue().set(buildKey(OAuth2ParameterNames.CODE, authorizationCodeToken.getTokenValue()),
authorization, between, TimeUnit.MINUTES);
}
if (isRefreshToken(authorization)) {
OAuth2RefreshToken refreshToken = authorization.getRefreshToken().getToken();
long between = ChronoUnit.SECONDS.between(refreshToken.getIssuedAt(), refreshToken.getExpiresAt());
redisTemplate.setValueSerializer(RedisSerializer.java());
redisTemplate.opsForValue().set(buildKey(OAuth2ParameterNames.REFRESH_TOKEN, refreshToken.getTokenValue()),
authorization, between, TimeUnit.SECONDS);
}
if (isAccessToken(authorization)) {
OAuth2AccessToken accessToken = authorization.getAccessToken().getToken();
long between = ChronoUnit.SECONDS.between(accessToken.getIssuedAt(), accessToken.getExpiresAt());
redisTemplate.setValueSerializer(RedisSerializer.java());
redisTemplate.opsForValue().set(buildKey(OAuth2ParameterNames.ACCESS_TOKEN, accessToken.getTokenValue()),
authorization, between, TimeUnit.SECONDS);
}
}
onAuthenticationSuccess
image
PigAuthenticationSuccessEventHandler实现AuthenticationSuccessHandler
@SneakyThrows
@Override
public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
Authentication authentication) {
OAuth2AccessTokenAuthenticationToken accessTokenAuthentication = (OAuth2AccessTokenAuthenticationToken) authentication;
Map<String, Object> map = accessTokenAuthentication.getAdditionalParameters();
if (MapUtil.isNotEmpty(map)) {
// 发送异步日志事件
PigUser userInfo = (PigUser) map.get(SecurityConstants.DETAILS_USER);
log.info("用户：{} 登录成功", userInfo.getName());
SecurityContextHolder.getContext().setAuthentication(accessTokenAuthentication);
SysLog logVo = SysLogUtils.getSysLog();
logVo.setTitle("登录成功");
String startTimeStr = request.getHeader(CommonConstants.REQUEST_START_TIME);
if (StrUtil.isNotBlank(startTimeStr)) {
Long startTime = Long.parseLong(startTimeStr);
Long endTime = System.currentTimeMillis();
logVo.setTime(endTime - startTime);
}
logVo.setCreateBy(userInfo.getName());
logVo.setUpdateBy(userInfo.getName());
SpringContextHolder.publishEvent(new SysLogEvent(logVo));
}
// 输出token
sendAccessTokenResponse(request, response, authentication);
}
输出token
private void sendAccessTokenResponse(HttpServletRequest request, HttpServletResponse response,
Authentication authentication) throws IOException {
OAuth2AccessTokenAuthenticationToken accessTokenAuthentication = (OAuth2AccessTokenAuthenticationToken) authentication;
OAuth2AccessToken accessToken = accessTokenAuthentication.getAccessToken();
OAuth2RefreshToken refreshToken = accessTokenAuthentication.getRefreshToken();
Map<String, Object> additionalParameters = accessTokenAuthentication.getAdditionalParameters();
OAuth2AccessTokenResponse.Builder builder = OAuth2AccessTokenResponse.withToken(accessToken.getTokenValue())
.tokenType(accessToken.getTokenType()).scopes(accessToken.getScopes());
if (accessToken.getIssuedAt() != null && accessToken.getExpiresAt() != null) {
builder.expiresIn(ChronoUnit.SECONDS.between(accessToken.getIssuedAt(), accessToken.getExpiresAt()));
}
if (refreshToken != null) {
builder.refreshToken(refreshToken.getTokenValue());
}
if (!CollectionUtils.isEmpty(additionalParameters)) {
builder.additionalParameters(additionalParameters);
}
OAuth2AccessTokenResponse accessTokenResponse = builder.build();
ServletServerHttpResponse httpResponse = new ServletServerHttpResponse(response);
// 无状态 注意删除 context 上下文的信息
SecurityContextHolder.clearContext();
this.accessTokenHttpResponseConverter.write(accessTokenResponse, null, httpResponse);
}
