SecurityFilterChain
若是項目脫離使用spring-boot-starter-tomcat依賴的話，ApplicationFilterChain中的過濾器鏈，只會有名稱爲springSecurityFileterChain的過濾器內容會生效，該Filter中包含一系列該請求匹配須要經歷的過濾器鏈。css
ApplicationFilterChain，when request arrived , enter the FilterChain.doFilter() method，The code is as followsas follow：html
/**
* Invoke the next filter in this chain, passing the specified request
* and response. If there are no more filters in this chain, invoke
* the <code>service()</code> method of the servlet itself.
*
* @param request The servlet request we are processing
* @param response The servlet response we are creating
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet exception occurs
*/
@Override
public void doFilter(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
if( Globals.IS_SECURITY_ENABLED ) {
final ServletRequest req = request;
final ServletResponse res = response;
try {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedExceptionAction<Void>() {
@Override
public Void run()
throws ServletException, IOException {
internalDoFilter(req,res);
return null;
}
}
);
} catch( PrivilegedActionException pe) {
Exception e = pe.getException();
if (e instanceof ServletException)
throw (ServletException) e;
else if (e instanceof IOException)
throw (IOException) e;
else if (e instanceof RuntimeException)
throw (RuntimeException) e;
else
throw new ServletException(e.getMessage(), e);
}
} else {
internalDoFilter(request,response);
}
}
Enter the internalDoFilter(request,response)，the code as follow：java
private void internalDoFilter(ServletRequest request,
ServletResponse response)
throws IOException, ServletException {
// Call the next filter if there is one
if (pos < n) {
ApplicationFilterConfig filterConfig = filters[pos++];
try {
Filter filter = filterConfig.getFilter();
if (request.isAsyncSupported() && "false".equalsIgnoreCase(
filterConfig.getFilterDef().getAsyncSupported())) {
request.setAttribute(Globals.ASYNC_SUPPORTED_ATTR, Boolean.FALSE);
}
if( Globals.IS_SECURITY_ENABLED ) {
final ServletRequest req = request;
final ServletResponse res = response;
Principal principal =
((HttpServletRequest) req).getUserPrincipal();
Object[] args = new Object[]{req, res, this};
SecurityUtil.doAsPrivilege ("doFilter", filter, classType, args, principal);
} else {
filter.doFilter(request, response, this);
}
} catch (IOException | ServletException | RuntimeException e) {
throw e;
} catch (Throwable e) {
e = ExceptionUtils.unwrapInvocationTargetException(e);
ExceptionUtils.handleThrowable(e);
throw new ServletException(sm.getString("filterChain.filter"), e);
}
return;
}
// We fell off the end of the chain -- call the servlet instance
try {
if (ApplicationDispatcher.WRAP_SAME_OBJECT) {
lastServicedRequest.set(request);
lastServicedResponse.set(response);
}
if (request.isAsyncSupported() && !servletSupportsAsync) {
request.setAttribute(Globals.ASYNC_SUPPORTED_ATTR,
Boolean.FALSE);
}
// Use potentially wrapped request from this point
if ((request instanceof HttpServletRequest) &&
(response instanceof HttpServletResponse) &&
Globals.IS_SECURITY_ENABLED ) {
final ServletRequest req = request;
final ServletResponse res = response;
Principal principal =
((HttpServletRequest) req).getUserPrincipal();
Object[] args = new Object[]{req, res};
SecurityUtil.doAsPrivilege("service",
servlet,
classTypeUsedInService,
args,
principal);
} else {
servlet.service(request, response);
}
} catch (IOException | ServletException | RuntimeException e) {
throw e;
} catch (Throwable e) {
e = ExceptionUtils.unwrapInvocationTargetException(e);
ExceptionUtils.handleThrowable(e);
throw new ServletException(sm.getString("filterChain.servlet"), e);
} finally {
if (ApplicationDispatcher.WRAP_SAME_OBJECT) {
lastServicedRequest.set(null);
lastServicedResponse.set(null);
}
}
}
代碼首先會判斷pos < n，pos表明當前是第幾個Filter，n表示總共的Filter大小。初次請求訪問pos爲0，而且每次有請求都會通過這些Filter。
全部的Filters均可以在ApplicationFilterChain中的以下代碼看到：web
/** * Filters. */ private ApplicationFilterConfig[] filters = new ApplicationFilterConfig[0];
此處的Filters的內容以下：spring
0：ApplicationFilterConfig[name=characterEncodingFilter, filterClass=org.springframework.boot.web.filter.OrderedCharacterEncodingFilter] 1：ApplicationFilterConfig[name=hiddenHttpMethodFilter, filterClass=org.springframework.boot.web.filter.OrderedHiddenHttpMethodFilter] 2：ApplicationFilterConfig[name=httpPutFormContentFilter, filterClass=org.springframework.boot.web.filter.OrderedHttpPutFormContentFilter] 3：ApplicationFilterConfig[name=requestContextFilter, filterClass=org.springframework.boot.web.filter.OrderedRequestContextFilter] 4：ApplicationFilterConfig[name=springSecurityFilterChain, filterClass=org.springframework.boot.web.servlet.DelegatingFilterProxyRegistrationBean$1] 5：ApplicationFilterConfig[name=authenticationTokenFilterBean, filterClass=org.zerhusen.security.JwtAuthenticationTokenFilter] 6：ApplicationFilterConfig[name=Tomcat WebSocket (JSR356) Filter, filterClass=org.apache.tomcat.websocket.server.WsFilter]
數字爲Filters中的下標，依次執行Filters。標題依次排列表示順序。express
call filter 0 (name = characterEncodingFilter, filterClass=org.springframework.boot.web.filter.OrderedCharacterEncodingFilter)apache
call filter 1 (name = hiddenHttpMethodFilter, filterClass=org.springframework.boot.web.filter.OrderedHiddenHttpMethodFilter)api
call fitler 2 (name=httpPutFormContentFilter, filterClass=org.springframework.boot.web.filter.OrderedHttpPutFormContentFilter)tomcat
call filter 3 (name=requestContextFilter, filterClass=org.springframework.boot.web.filter.OrderedRequestContextFilter)安全
SecurityFilterChain
call filter 4 (ApplicationFilterConfig[name=springSecurityFilterChain, filterClass=org.springframework.boot.web.servlet.DelegatingFilterProxyRegistrationBean$1])
名稱爲springSecurityFilterChain的Filter，注入的Filter實現類實際是DelegatingFilterProxyRegistrationBean，是一個代理類。真正調用的是DelegatingFilterProxy對象的doFilter() method。
DelegatingFilterProxy.doFilter()：
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
// Lazily initialize the delegate if necessary.
Filter delegateToUse = this.delegate;
if (delegateToUse == null) {
synchronized (this.delegateMonitor) {
if (this.delegate == null) {
WebApplicationContext wac = findWebApplicationContext();
if (wac == null) {
throw new IllegalStateException("No WebApplicationContext found: " +
"no ContextLoaderListener or DispatcherServlet registered?");
}
this.delegate = initDelegate(wac);
}
delegateToUse = this.delegate;
}
}
// Let the delegate perform the actual doFilter operation.
invokeDelegate(delegateToUse, request, response, filterChain);
}
初次加載時，this.delegate爲null。聲明以下：
private volatile Filter delegate;
this.delegate實際上爲一個FilterChain。initDelegate方法以下，主要是初始化springSecurityFilterChain。
/**
* Initialize the Filter delegate, defined as bean the given Spring
* application context.
* <p>The default implementation fetches the bean from the application context
* and calls the standard {@code Filter.init} method on it, passing
* in the FilterConfig of this Filter proxy.
* @param wac the root application context
* @return the initialized delegate Filter
* @throws ServletException if thrown by the Filter
* @see #getTargetBeanName()
* @see #isTargetFilterLifecycle()
* @see #getFilterConfig()
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
protected Filter initDelegate(WebApplicationContext wac) throws ServletException {
Filter delegate = wac.getBean(getTargetBeanName(), Filter.class);
if (isTargetFilterLifecycle()) {
delegate.init(getFilterConfig());
}
return delegate;
}
delegate就是一個FiletChain，包含了一系列須要的Filters。
this.delegate的內容和其中的FilterChains如圖所示：
// Let the delegate perform the actual doFilter operation.
invokeDelegate(delegateToUse, request, response, filterChain);
最後執行實際的須要的Filters，也就是springSecurityFilterChain(FilcerChain)。
invokeDelegate(delegateToUse, request, response, filterChain)方法代碼以下：
/**
* Actually invoke the delegate Filter with the given request and response.
* @param delegate the delegate Filter
* @param request the current HTTP request
* @param response the current HTTP response
* @param filterChain the current FilterChain
* @throws ServletException if thrown by the Filter
* @throws IOException if thrown by the Filter
*/
protected void invokeDelegate(
Filter delegate, ServletRequest request, ServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
delegate.doFilter(request, response, filterChain);
}
enter the FilterChainProxy.doFilter() method，the code as follow：
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
boolean clearContext = request.getAttribute(FILTER_APPLIED) == null;
if (clearContext) {
try {
request.setAttribute(FILTER_APPLIED, Boolean.TRUE);
doFilterInternal(request, response, chain);
}
finally {
SecurityContextHolder.clearContext();
request.removeAttribute(FILTER_APPLIED);
}
}
else {
doFilterInternal(request, response, chain);
}
}
chain爲ApplicationFilterChain，這樣設計是循環調用，最終回到applicationFilterChain，繼續執行next filter。Enter the doFilterInternal(request, response, chain)，the code as follow：
private void doFilterInternal(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
FirewalledRequest fwRequest = firewall
.getFirewalledRequest((HttpServletRequest) request);
HttpServletResponse fwResponse = firewall
.getFirewalledResponse((HttpServletResponse) response);
List<Filter> filters = getFilters(fwRequest);
if (filters == null || filters.size() == 0) {
if (logger.isDebugEnabled()) {
logger.debug(UrlUtils.buildRequestUrl(fwRequest)
+ (filters == null ? " has no matching filters"
: " has an empty filter list"));
}
fwRequest.reset();
chain.doFilter(fwRequest, fwResponse);
return;
}
VirtualFilterChain vfc = new VirtualFilterChain(fwRequest, chain, filters);
vfc.doFilter(fwRequest, fwResponse);
}
getFilters(fwRequest)是根據該請求的訪問路徑來進行匹配須要過濾的Filter。
getFilters(fwRequest) code as follow：
/**
* Returns the first filter chain matching the supplied URL.
*
* @param request the request to match
* @return an ordered array of Filters defining the filter chain
*/
private List<Filter> getFilters(HttpServletRequest request) {
for (SecurityFilterChain chain : filterChains) {
if (chain.matches(request)) {
return chain.getFilters();
}
}
return null;
}
獲取到該請求須要過濾的Filters後則開始進行該請求的Filters過濾。若是該請求匹配到須要過濾的Filters爲0，則不進行過濾。不然經過新建VirualFilterChain來執行這些Filters的過濾。
繼續執行流程，The code as follow：
VirtualFilterChain vfc = new VirtualFilterChain(fwRequest, chain, filters); vfc.doFilter(fwRequest, fwResponse);
傳遞request請求和chain(applicationFilterChain)，filters(該請求匹配到須要過濾的Filters)。
VirtualFilterChain
VirtualFilterChain是FilterChainProxy內部類，VirtualFilterChain類聲明代碼以下：
// ~ Inner Classes
// ==================================================================================================
/**
* Internal {@code FilterChain} implementation that is used to pass a request through
* the additional internal list of filters which match the request.
*/
private static class VirtualFilterChain implements FilterChain {
private final FilterChain originalChain;
private final List<Filter> additionalFilters;
private final FirewalledRequest firewalledRequest;
private final int size;
private int currentPosition = 0;
private VirtualFilterChain(FirewalledRequest firewalledRequest,
FilterChain chain, List<Filter> additionalFilters) {
this.originalChain = chain;
this.additionalFilters = additionalFilters;
this.size = additionalFilters.size();
this.firewalledRequest = firewalledRequest;
}
public void doFilter(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
if (currentPosition == size) {
if (logger.isDebugEnabled()) {
logger.debug(UrlUtils.buildRequestUrl(firewalledRequest)
+ " reached end of additional filter chain; proceeding with original chain");
}
// Deactivate path stripping as we exit the security filter chain
this.firewalledRequest.reset();
originalChain.doFilter(request, response);
}
else {
currentPosition++;
Filter nextFilter = additionalFilters.get(currentPosition - 1);
if (logger.isDebugEnabled()) {
logger.debug(UrlUtils.buildRequestUrl(firewalledRequest)
+ " at position " + currentPosition + " of " + size
+ " in additional filter chain; firing Filter: '"
+ nextFilter.getClass().getSimpleName() + "'");
}
nextFilter.doFilter(request, response, this);
}
}
}
如今則開始循環過濾匹配到的Filters，執行doFilter()，The code as follow：
public void doFilter(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
if (currentPosition == size) {
if (logger.isDebugEnabled()) {
logger.debug(UrlUtils.buildRequestUrl(firewalledRequest)
+ " reached end of additional filter chain; proceeding with original chain");
}
// Deactivate path stripping as we exit the security filter chain
this.firewalledRequest.reset();
originalChain.doFilter(request, response);
}
else {
currentPosition++;
Filter nextFilter = additionalFilters.get(currentPosition - 1);
if (logger.isDebugEnabled()) {
logger.debug(UrlUtils.buildRequestUrl(firewalledRequest)
+ " at position " + currentPosition + " of " + size
+ " in additional filter chain; firing Filter: '"
+ nextFilter.getClass().getSimpleName() + "'");
}
nextFilter.doFilter(request, response, this);
}
}
addtionalFilters爲該請求匹配到須要進行過濾的Filters，如圖所示：
數字爲Filters的下標。
0：org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@bfe47a8
1：org.springframework.security.web.context.SecurityContextPersistenceFilter@2ad2b274
3：org.springframework.security.web.authentication.logout.LogoutFilter@8383a14
4：org.zerhusen.security.JwtAuthenticationTokenFilter@274234c3
5：org.springframework.security.web.savedrequest.RequestCacheAwareFilter@7114e780
6：org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@f9b8129
Filters 7 AnonymousAuthenticationFilter
7:org.springframework.security.web.authentication.AnonymousAuthenticationFilter@2f1f9515AnonymousAuthenticationFilter.doFilter()：主要做用是當沒有Authentication數據時，產生默認的匿名Authentication信息。
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
if (SecurityContextHolder.getContext().getAuthentication() == null) {
SecurityContextHolder.getContext().setAuthentication(
createAuthentication((HttpServletRequest) req));
if (logger.isDebugEnabled()) {
logger.debug("Populated SecurityContextHolder with anonymous token: '"
+ SecurityContextHolder.getContext().getAuthentication() + "'");
}
}
else {
if (logger.isDebugEnabled()) {
logger.debug("SecurityContextHolder not populated with anonymous token, as it already contained: '"
+ SecurityContextHolder.getContext().getAuthentication() + "'");
}
}
chain.doFilter(req, res);
}
SecurityContextHolder.getContext().getAuthentication()==null的話，則會生成匿名的Authentication信息，調用createAuthentication(httpServletRequest request)方法，代碼以下；
protected Authentication createAuthentication(HttpServletRequest request) {
AnonymousAuthenticationToken auth = new AnonymousAuthenticationToken(key,
principal, authorities);
auth.setDetails(authenticationDetailsSource.buildDetails(request));
return auth;
}
principal：anonymousUser，authorities：[ROLE_ANONYMOUS]。
auth以下圖所示
若是SecurityContextHolder.getContext().getAuthentication()!=null的話，則會在控制檯打印：
" not populated with anonymous token, as it already contained: "信息。
Filters 8 SessionManagementFilter
8：org.springframework.security.web.session.SessionManagementFilter@731db93f
SessionManagementFilter.doFilter()，The code as follow：
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
if (request.getAttribute(FILTER_APPLIED) != null) {
chain.doFilter(request, response);
return;
}
request.setAttribute(FILTER_APPLIED, Boolean.TRUE);
if (!securityContextRepository.containsContext(request)) {
Authentication authentication = SecurityContextHolder.getContext()
.getAuthentication();
if (authentication != null && !trustResolver.isAnonymous(authentication)) {
// The user has been authenticated during the current request, so call the
// session strategy
try {
sessionAuthenticationStrategy.onAuthentication(authentication,
request, response);
}
catch (SessionAuthenticationException e) {
// The session strategy can reject the authentication
logger.debug(
"SessionAuthenticationStrategy rejected the authentication object",
e);
SecurityContextHolder.clearContext();
failureHandler.onAuthenticationFailure(request, response, e);
return;
}
// Eagerly save the security context to make it available for any possible
// re-entrant
// requests which may occur before the current request completes.
// SEC-1396.
securityContextRepository.saveContext(SecurityContextHolder.getContext(),
request, response);
}
else {
// No security context or authentication present. Check for a session
// timeout
if (request.getRequestedSessionId() != null
&& !request.isRequestedSessionIdValid()) {
if (logger.isDebugEnabled()) {
logger.debug("Requested session ID "
+ request.getRequestedSessionId() + " is invalid.");
}
if (invalidSessionStrategy != null) {
invalidSessionStrategy
.onInvalidSessionDetected(request, response);
return;
}
}
}
}
chain.doFilter(request, response);
}
此處會進入else，控制檯會打印 reuqestSessionId invalid。
Filters 9 ExceptionTranslationFilter
9：org.springframework.security.web.access.ExceptionTranslationFilter@278fe428
ExceptionTranslationFilter的做用是作了一層包裝，當後續的Filter出現異常時會在ExceptionTranslationFilter的doFilter()中進行捕獲。doFilter() code as follow：
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
try {
chain.doFilter(request, response);
logger.debug("Chain processed normally");
}
catch (IOException ex) {
throw ex;
}
catch (Exception ex) {
// Try to extract a SpringSecurityException from the stacktrace
Throwable[] causeChain = throwableAnalyzer.determineCauseChain(ex);
RuntimeException ase = (AuthenticationException) throwableAnalyzer
.getFirstThrowableOfType(AuthenticationException.class, causeChain);
if (ase == null) {
ase = (AccessDeniedException) throwableAnalyzer.getFirstThrowableOfType(
AccessDeniedException.class, causeChain);
}
if (ase != null) {
handleSpringSecurityException(request, response, chain, ase);
}
else {
// Rethrow ServletExceptions and RuntimeExceptions as-is
if (ex instanceof ServletException) {
throw (ServletException) ex;
}
else if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
// Wrap other Exceptions. This shouldn't actually happen
// as we've already covered all the possibilities for doFilter
throw new RuntimeException(ex);
}
}
}
Filters 10 FilterSecurityInterceptor
10：org.springframework.security.web.access.intercept.FilterSecurityInterceptor@5b4954b2
FilterSecurityInterceptor.doFilter() code as follow：
/**
* Method that is actually called by the filter chain. Simply delegates to the
* {@link #invoke(FilterInvocation)} method.
*
* @param request the servlet request
* @param response the servlet response
* @param chain the filter chain
*
* @throws IOException if the filter chain fails
* @throws ServletException if the filter chain fails
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
FilterInvocation fi = new FilterInvocation(request, response, chain);
invoke(fi);
}
chain爲VirtualFilterChain，invoke(fi)代碼以下：
public void invoke(FilterInvocation fi) throws IOException, ServletException {
if ((fi.getRequest() != null)
&& (fi.getRequest().getAttribute(FILTER_APPLIED) != null)
&& observeOncePerRequest) {
// filter already applied to this request and user wants us to observe
// once-per-request handling, so don't re-do security checking
fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
}
else {
// first time this request being called, so perform security checking
if (fi.getRequest() != null) {
fi.getRequest().setAttribute(FILTER_APPLIED, Boolean.TRUE);
}
InterceptorStatusToken token = super.beforeInvocation(fi);
try {
fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
}
finally {
super.finallyInvocation(token);
}
super.afterInvocation(token, null);
}
}
第一次請求調用會進行安全檢查，因此進入else代碼塊，當執行到InterceptorStatusToken token = super.beforeInvocation(fi); 此處是super，因此會調用父類的beforeInvocation(fi)方法。FilterSecurityInteceptor extends AbstractSecurityInterceptor。
AbstractSecurityInterceptor.beforeInvocation() method，The code as follow：
protected InterceptorStatusToken beforeInvocation(Object object) {
Assert.notNull(object, "Object was null");
final boolean debug = logger.isDebugEnabled();
if (!getSecureObjectClass().isAssignableFrom(object.getClass())) {
throw new IllegalArgumentException(
"Security invocation attempted for object "
+ object.getClass().getName()
+ " but AbstractSecurityInterceptor only configured to support secure objects of type: "
+ getSecureObjectClass());
}
Collection<ConfigAttribute> attributes = this.obtainSecurityMetadataSource()
.getAttributes(object);
if (attributes == null || attributes.isEmpty()) {
if (rejectPublicInvocations) {
throw new IllegalArgumentException(
"Secure object invocation "
+ object
+ " was denied as public invocations are not allowed via this interceptor. "
+ "This indicates a configuration error because the "
+ "rejectPublicInvocations property is set to 'true'");
}
if (debug) {
logger.debug("Public object - authentication not attempted");
}
publishEvent(new PublicInvocationEvent(object));
return null; // no further work post-invocation
}
if (debug) {
logger.debug("Secure object: " + object + "; Attributes: " + attributes);
}
if (SecurityContextHolder.getContext().getAuthentication() == null) {
credentialsNotFound(messages.getMessage(
"AbstractSecurityInterceptor.authenticationNotFound",
"An Authentication object was not found in the SecurityContext"),
object, attributes);
}
Authentication authenticated = authenticateIfRequired();
// Attempt authorization
try {
this.accessDecisionManager.decide(authenticated, object, attributes);
}
catch (AccessDeniedException accessDeniedException) {
publishEvent(new AuthorizationFailureEvent(object, attributes, authenticated,
accessDeniedException));
throw accessDeniedException;
}
if (debug) {
logger.debug("Authorization successful");
}
if (publishAuthorizationSuccess) {
publishEvent(new AuthorizedEvent(object, attributes, authenticated));
}
// Attempt to run as a different user
Authentication runAs = this.runAsManager.buildRunAs(authenticated, object,
attributes);
if (runAs == null) {
if (debug) {
logger.debug("RunAsManager did not change Authentication object");
}
// no further work post-invocation
return new InterceptorStatusToken(SecurityContextHolder.getContext(), false,
attributes, object);
}
else {
if (debug) {
logger.debug("Switching to RunAs Authentication: " + runAs);
}
SecurityContext origCtx = SecurityContextHolder.getContext();
SecurityContextHolder.setContext(SecurityContextHolder.createEmptyContext());
SecurityContextHolder.getContext().setAuthentication(runAs);
// need to revert to token.Authenticated post-invocation
return new InterceptorStatusToken(origCtx, true, attributes, object);
}
}
此代碼中有一段關鍵代碼：
Collection<ConfigAttribute> attributes = this.obtainSecurityMetadataSource()
.getAttributes(object);
if (attributes == null || attributes.isEmpty()) {
if (rejectPublicInvocations) {
throw new IllegalArgumentException(
"Secure object invocation "
+ object
+ " was denied as public invocations are not allowed via this interceptor. "
+ "This indicates a configuration error because the "
+ "rejectPublicInvocations property is set to 'true'");
}
若是此處沒有得到權限，則會拋出異常。不然繼續執行
authenticateIfRequired() code as follow：
/**
* Checks the current authentication token and passes it to the AuthenticationManager
* if {@link org.springframework.security.core.Authentication#isAuthenticated()}
* returns false or the property <tt>alwaysReauthenticate</tt> has been set to true.
*
* @return an authenticated <tt>Authentication</tt> object.
*/
private Authentication authenticateIfRequired() {
Authentication authentication = SecurityContextHolder.getContext()
.getAuthentication();
if (authentication.isAuthenticated() && !alwaysReauthenticate) {
if (logger.isDebugEnabled()) {
logger.debug("Previously Authenticated: " + authentication);
}
return authentication;
}
authentication = authenticationManager.authenticate(authentication);
// We don't authenticated.setAuthentication(true), because each provider should do
// that
if (logger.isDebugEnabled()) {
logger.debug("Successfully Authenticated: " + authentication);
}
SecurityContextHolder.getContext().setAuthentication(authentication);
return authentication;
}
此處會進入if(authentication.isAuthenticated() && !alwaysReauthenticate)代碼塊，而且reuturn。回到以下代碼塊處：
Authentication authenticated = authenticateIfRequired();
// Attempt authorization
try {
this.accessDecisionManager.decide(authenticated, object, attributes);
}
catch (AccessDeniedException accessDeniedException) {
publishEvent(new AuthorizationFailureEvent(object, attributes, authenticated,
accessDeniedException));
throw accessDeniedException;
}
if (debug) {
logger.debug("Authorization successful");
}
if (publishAuthorizationSuccess) {
publishEvent(new AuthorizedEvent(object, attributes, authenticated));
}
// Attempt to run as a different user
Authentication runAs = this.runAsManager.buildRunAs(authenticated, object,
attributes);
if (runAs == null) {
if (debug) {
logger.debug("RunAsManager did not change Authentication object");
}
// no further work post-invocation
return new InterceptorStatusToken(SecurityContextHolder.getContext(), false,
attributes, object);
}
else {
if (debug) {
logger.debug("Switching to RunAs Authentication: " + runAs);
}
SecurityContext origCtx = SecurityContextHolder.getContext();
SecurityContextHolder.setContext(SecurityContextHolder.createEmptyContext());
SecurityContextHolder.getContext().setAuthentication(runAs);
// need to revert to token.Authenticated post-invocation
return new InterceptorStatusToken(origCtx, true, attributes, object);
}
上圖中有一段關鍵代碼：
// Attempt authorization
try {
this.accessDecisionManager.decide(authenticated, object, attributes);
}
catch (AccessDeniedException accessDeniedException) {
publishEvent(new AuthorizationFailureEvent(object, attributes, authenticated,
accessDeniedException));
throw accessDeniedException;
}
this.accessDecisionManager.decide(authenticated, object, attributes);，此處的this.accessDecisionManager的實現是AffirmativeBased類。AffirmativeBased.decide方法以下：
/**
* This concrete implementation simply polls all configured
* {@link AccessDecisionVoter}s and grants access if any
* <code>AccessDecisionVoter</code> voted affirmatively. Denies access only if there
* was a deny vote AND no affirmative votes.
* <p>
* If every <code>AccessDecisionVoter</code> abstained from voting, the decision will
* be based on the {@link #isAllowIfAllAbstainDecisions()} property (defaults to
* false).
* </p>
*
* @param authentication the caller invoking the method
* @param object the secured object
* @param configAttributes the configuration attributes associated with the method
* being invoked
*
* @throws AccessDeniedException if access is denied
*/
public void decide(Authentication authentication, Object object,
Collection<ConfigAttribute> configAttributes) throws AccessDeniedException {
int deny = 0;
for (AccessDecisionVoter voter : getDecisionVoters()) {
int result = voter.vote(authentication, object, configAttributes);
if (logger.isDebugEnabled()) {
logger.debug("Voter: " + voter + ", returned: " + result);
}
switch (result) {
case AccessDecisionVoter.ACCESS_GRANTED:
return;
case AccessDecisionVoter.ACCESS_DENIED:
deny++;
break;
default:
break;
}
}
if (deny > 0) {
throw new AccessDeniedException(messages.getMessage(
"AbstractAccessDecisionManager.accessDenied", "Access is denied"));
}
// To get this far, every AccessDecisionVoter abstained
checkAllowIfAllAbstainDecisions();
}
若是是匿名用戶，雖然訪問的是沒有加權限的方法，但到這時會拋出AccessDeniedException異常。
疑問：
若是是訪問的須要認證的URL，並無在extends WebSecurityConfigurerAdapter的實現類中包含，例如：
@Override
protected void configure(HttpSecurity httpSecurity) throws Exception {
httpSecurity
// we don't need CSRF because our token is invulnerable
.csrf().disable()
.exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
// don't create session
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
.authorizeRequests()
//.antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
// allow anonymous resource requests
.antMatchers(
HttpMethod.GET,
"/",
"/*.html",
"/favicon.ico",
"/**/*.html",
"/**/*.css",
"/**/*.js"
).permitAll()
.antMatchers("/auth/**").permitAll()
.anyRequest().authenticated();
// Custom JWT based security filter
httpSecurity
.addFilterBefore(authenticationTokenFilterBean(), UsernamePasswordAuthenticationFilter.class);
// disable page caching
httpSecurity.headers().cacheControl();
}
當訪問/hello，顯然該請求是須要進行認證的，爲何不在請求的最初就進行驗證，須要到SpringSecuirty的最後的攔截器纔開始認證？這不是很浪費效率嗎？
控制檯打印以下：
2017-04-14 10:19:46.833 DEBUG 5888 --- [nio-8080-exec-6] o.s.s.access.vote.AffirmativeBased : Voter: org.springframework.security.web.access.expression.WebExpressionVoter@6012eb80, returned: -1 2017-04-14 10:19:53.282 DEBUG 5888 --- [nio-8080-exec-6] o.s.s.w.a.ExceptionTranslationFilter : Access is denied (user is anonymous); redirecting to authentication entry point org.springframework.security.access.AccessDeniedException: Access is denied at org.springframework.security.access.vote.AffirmativeBased.decide(AffirmativeBased.java:84) ~[spring-security-core-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.access.intercept.AbstractSecurityInterceptor.beforeInvocation(AbstractSecurityInterceptor.java:233) ~[spring-security-core-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:124) ~[spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) ~[spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115) ~[spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.zerhusen.security.JwtAuthenticationTokenFilter.doFilterInternal(JwtAuthenticationTokenFilter.java:58) [classes/:na] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:121) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) [spring-security-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.5.RELEASE.jar:4.3.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410) [tomcat-embed-core-8.5.6.jar:8.5.6] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.6.jar:8.5.6] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.6.jar:8.5.6] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
當拋出Access is denied異常後責會交由TransactionFilter進行處理，最終拋到ApplicationFilterChain。若是認證成功，擁有權限則繼續執行this.accessDecisionManager.decide()以後代碼。
由於是AnonymousAuthenticationToken，匿名Authentication，因此runAS==null會執行
// no further work post-invocation return new InterceptorStatusToken(SecurityContextHolder.getContext(), false,attributes, object);
回到FilterSecurityInteceptor的InterceptorStatusToken token = super.beforeInvocation(fi);代碼處。執行如下代碼：
InterceptorStatusToken token = super.beforeInvocation(fi);
try {
fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
}
finally {
super.finallyInvocation(token);
}
super.afterInvocation(token, null);
執行fi.getChain().doFilter(fi.getRequest(), fi.getResponse());代碼時會跳轉到FilterChainProxy.doFilter()
此時currentPosition==size執行如下邏輯：
public void doFilter(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
if (currentPosition == size) {
if (logger.isDebugEnabled()) {
logger.debug(UrlUtils.buildRequestUrl(firewalledRequest)
+ " reached end of additional filter chain; proceeding with original chain");
}
// Deactivate path stripping as we exit the security filter chain
this.firewalledRequest.reset();
originalChain.doFilter(request, response);
}
執行originalChain.doFilter(request, response);會回到applicationFilterChain.doFilter()繼續執行next Filters。
ApplicationFilerChain.doFilter繼續執行 next filter.
5：ApplicationFilterConfig[name=authenticationTokenFilterBean, filterClass=org.zerhusen.security.JwtAuthenticationTokenFilter]
private void internalDoFilter(ServletRequest request,
ServletResponse response)
throws IOException, ServletException {
// Call the next filter if there is one
if (pos < n) {
ApplicationFilterConfig filterConfig = filters[pos++];
try {
Filter filter = filterConfig.getFilter();
if (request.isAsyncSupported() && "false".equalsIgnoreCase(
filterConfig.getFilterDef().getAsyncSupported())) {
request.setAttribute(Globals.ASYNC_SUPPORTED_ATTR, Boolean.FALSE);
}
if( Globals.IS_SECURITY_ENABLED ) {
final ServletRequest req = request;
final ServletResponse res = response;
Principal principal =
((HttpServletRequest) req).getUserPrincipal();
Object[] args = new Object[]{req, res, this};
SecurityUtil.doAsPrivilege ("doFilter", filter, classType, args, principal);
} else {
filter.doFilter(request, response, this);
}
} catch (IOException | ServletException | RuntimeException e) {
throw e;
} catch (Throwable e) {
e = ExceptionUtils.unwrapInvocationTargetException(e);
ExceptionUtils.handleThrowable(e);
throw new ServletException(sm.getString("filterChain.filter"), e);
}
return;
}
// We fell off the end of the chain -- call the servlet instance
try {
if (ApplicationDispatcher.WRAP_SAME_OBJECT) {
lastServicedRequest.set(request);
lastServicedResponse.set(response);
}
if (request.isAsyncSupported() && !servletSupportsAsync) {
request.setAttribute(Globals.ASYNC_SUPPORTED_ATTR,
Boolean.FALSE);
}
// Use potentially wrapped request from this point
if ((request instanceof HttpServletRequest) &&
(response instanceof HttpServletResponse) &&
Globals.IS_SECURITY_ENABLED ) {
final ServletRequest req = request;
final ServletResponse res = response;
Principal principal =
((HttpServletRequest) req).getUserPrincipal();
Object[] args = new Object[]{req, res};
SecurityUtil.doAsPrivilege("service",
servlet,
classTypeUsedInService,
args,
principal);
} else {
servlet.service(request, response);
}
} catch (IOException | ServletException | RuntimeException e) {
throw e;
} catch (Throwable e) {
e = ExceptionUtils.unwrapInvocationTargetException(e);
ExceptionUtils.handleThrowable(e);
throw new ServletException(sm.getString("filterChain.servlet"), e);
} finally {
if (ApplicationDispatcher.WRAP_SAME_OBJECT) {
lastServicedRequest.set(null);
lastServicedResponse.set(null);
}
}
}
當 if(pos< n)全部Filters執行完畢後，進入以後的try{}代碼塊。
最終調用servlet.service(request,response)進行調用。
進入受權的的controller處理：
@RequestMapping(value = "/oauth", method = RequestMethod.POST)
public ResponseEntity<?> createAuthenticationToken(@RequestBody JwtAuthenticationRequest authenticationRequest, Device device) throws AuthenticationException {
// Perform the security
final Authentication authentication = authenticationManager.authenticate(
new UsernamePasswordAuthenticationToken(
authenticationRequest.getUsername(),
authenticationRequest.getPassword()
)
);
SecurityContextHolder.getContext().setAuthentication(authentication);
// Reload password post-security so we can generate token
final UserDetails userDetails = userDetailsService.loadUserByUsername(authenticationRequest.getUsername());
final String token = jwtTokenUtil.generateToken(userDetails, device); // Return the token
return ResponseEntity.ok(new JwtAuthenticationResponse(token));
}
authenticationManager.authenticate()，此處authenticationManager實現是org.springframework.security.authentication.ProviderManager。
首先訪問：
/**
* Attempts to authenticate the passed {@link Authentication} object.
* <p>
* The list of {@link AuthenticationProvider}s will be successively tried until an
* <code>AuthenticationProvider</code> indicates it is capable of authenticating the
* type of <code>Authentication</code> object passed. Authentication will then be
* attempted with that <code>AuthenticationProvider</code>.
* <p>
* If more than one <code>AuthenticationProvider</code> supports the passed
* <code>Authentication</code> object, the first one able to successfully
* authenticate the <code>Authentication</code> object determines the
* <code>result</code>, overriding any possible <code>AuthenticationException</code>
* thrown by earlier supporting <code>AuthenticationProvider</code>s.
* On successful authentication, no subsequent <code>AuthenticationProvider</code>s
* will be tried.
* If authentication was not successful by any supporting
* <code>AuthenticationProvider</code> the last thrown
* <code>AuthenticationException</code> will be rethrown.
*
* @param authentication the authentication request object.
*
* @return a fully authenticated object including credentials.
*
* @throws AuthenticationException if authentication fails.
*/
public Authentication authenticate(Authentication authentication)
throws AuthenticationException {
Class<? extends Authentication> toTest = authentication.getClass();
AuthenticationException lastException = null;
Authentication result = null;
boolean debug = logger.isDebugEnabled();
for (AuthenticationProvider provider : getProviders()) {
if (!provider.supports(toTest)) {
continue;
}
if (debug) {
logger.debug("Authentication attempt using "
+ provider.getClass().getName());
}
try {
result = provider.authenticate(authentication);
if (result != null) {
copyDetails(authentication, result);
break;
}
}
catch (AccountStatusException e) {
prepareException(e, authentication);
// SEC-546: Avoid polling additional providers if auth failure is due to
// invalid account status
throw e;
}
catch (InternalAuthenticationServiceException e) {
prepareException(e, authentication);
throw e;
}
catch (AuthenticationException e) {
lastException = e;
}
}
if (result == null && parent != null) {
// Allow the parent to try.
try {
result = parent.authenticate(authentication);
}
catch (ProviderNotFoundException e) {
// ignore as we will throw below if no other exception occurred prior to
// calling parent and the parent
// may throw ProviderNotFound even though a provider in the child already
// handled the request
}
catch (AuthenticationException e) {
lastException = e;
}
}
if (result != null) {
if (eraseCredentialsAfterAuthentication
&& (result instanceof CredentialsContainer)) {
// Authentication is complete. Remove credentials and other secret data
// from authentication
((CredentialsContainer) result).eraseCredentials();
}
eventPublisher.publishAuthenticationSuccess(result);
return result;
}
// Parent was null, or didn't authenticate (or throw an exception).
if (lastException == null) {
lastException = new ProviderNotFoundException(messages.getMessage(
"ProviderManager.providerNotFound",
new Object[] { toTest.getName() },
"No AuthenticationProvider found for {0}"));
}
prepareException(lastException, authentication); throw lastException;
}
執行到provider.authenticate(authentication);，代碼以下：此處provider爲org.springframework.security.authentication.dao.DaoAuthenticationProvider@7cdb7fc，其實是AbstractUserDetailsAuthenticationProvider。
public class DaoAuthenticationProvider extends AbstractUserDetailsAuthenticationProvider
進入AbstractUserDetailsAuthenticationProvider開始效驗用戶名和密碼是否正確。authenticate()方法以下：
public Authentication authenticate(Authentication authentication)
throws AuthenticationException {
Assert.isInstanceOf(UsernamePasswordAuthenticationToken.class, authentication,
messages.getMessage(
"AbstractUserDetailsAuthenticationProvider.onlySupports",
"Only UsernamePasswordAuthenticationToken is supported"));
// Determine username
String username = (authentication.getPrincipal() == null) ? "NONE_PROVIDED"
: authentication.getName();
boolean cacheWasUsed = true;
UserDetails user = this.userCache.getUserFromCache(username);
if (user == null) {
cacheWasUsed = false;
try {
user = retrieveUser(username,
(UsernamePasswordAuthenticationToken) authentication);
}
catch (UsernameNotFoundException notFound) {
logger.debug("User '" + username + "' not found");
if (hideUserNotFoundExceptions) {
throw new BadCredentialsException(messages.getMessage(
"AbstractUserDetailsAuthenticationProvider.badCredentials",
"Bad credentials"));
}
else {
throw notFound;
}
}
Assert.notNull(user,
"retrieveUser returned null - a violation of the interface contract");
}
try {
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user,
(UsernamePasswordAuthenticationToken) authentication);
}
catch (AuthenticationException exception) {
if (cacheWasUsed) {
// 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);
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user,
(UsernamePasswordAuthenticationToken) authentication);
}
else {
throw exception;
}
}
postAuthenticationChecks.check(user);
if (!cacheWasUsed) {
this.userCache.putUserInCache(user);
}
Object principalToReturn = user;
if (forcePrincipalAsString) {
principalToReturn = user.getUsername();
} return createSuccessAuthentication(principalToReturn, authentication, user);
}
此處的this.userCache.getUserFromCache(username);返回null，由於userCache實現默認爲org.springframework.security.core.userdetails.cache.NullUserCache@cc42bd4
則執行如下代碼塊：
retrieveUser(username,(UsernamePasswordAuthenticationToken) authentication);
DaoAuthenticationProvider.retrieveUser()方法以下：
protected final UserDetails retrieveUser(String username,
UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException {
UserDetails loadedUser;
try {
loadedUser = this.getUserDetailsService().loadUserByUsername(username);
}
catch (UsernameNotFoundException notFound) {
if (authentication.getCredentials() != null) {
String presentedPassword = authentication.getCredentials().toString();
passwordEncoder.isPasswordValid(userNotFoundEncodedPassword,
presentedPassword, null);
}
throw notFound;
}
catch (Exception repositoryProblem) {
throw new InternalAuthenticationServiceException(
repositoryProblem.getMessage(), repositoryProblem);
} if (loadedUser == null) {
throw new InternalAuthenticationServiceException(
"UserDetailsService returned null, which is an interface contract violation");
}
return loadedUser;
}
而後回到AbstractUserDetailsAuthenticationProvider.authenticate()方法處。執行如下代碼：
try {
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user,
(UsernamePasswordAuthenticationToken) authentication);
}
addtionalAuthenticationChecks()聲明以下：
/**
* Allows subclasses to perform any additional checks of a returned (or cached)
* <code>UserDetails</code> for a given authentication request. Generally a subclass
* will at least compare the {@link Authentication#getCredentials()} with a
* {@link UserDetails#getPassword()}. If custom logic is needed to compare additional
* properties of <code>UserDetails</code> and/or
* <code>UsernamePasswordAuthenticationToken</code>, these should also appear in this
* method.
*
* @param userDetails as retrieved from the
* {@link #retrieveUser(String, UsernamePasswordAuthenticationToken)} or
* <code>UserCache</code>
* @param authentication the current request that needs to be authenticated
*
* @throws AuthenticationException AuthenticationException if the credentials could
* not be validated (generally a <code>BadCredentialsException</code>, an
* <code>AuthenticationServiceException</code>)
*/
protected abstract void additionalAuthenticationChecks(UserDetails userDetails,
UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException;
此處判斷密碼是否正確。若是不正確將拋出異常，正確的話，將跳轉到AbstractUserDetailsAuthenticationProvider的以下代碼塊：
try {
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user,
(UsernamePasswordAuthenticationToken) authentication);
}
catch (AuthenticationException exception) {
if (cacheWasUsed) {
// 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);
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user,
(UsernamePasswordAuthenticationToken) authentication);
}
else {
throw exception;
}
}
postAuthenticationChecks.check(user);
if (!cacheWasUsed) {
this.userCache.putUserInCache(user);
}
Object principalToReturn = user;
if (forcePrincipalAsString) {
principalToReturn = user.getUsername();
} return createSuccessAuthentication(principalToReturn, authentication, user);
此處真正的實現類是DaoAuthenticationProvider，因此會執行DaoAuthenticationProvider.additionalAuthenticationChecks。
DaoAuthenticationProvider.additionalAuthenticationChecks實現以下：
// ~ Methods
// ========================================================================================================
@SuppressWarnings("deprecation")
protected void additionalAuthenticationChecks(UserDetails userDetails,
UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException {
Object salt = null;
if (this.saltSource != null) {
salt = this.saltSource.getSalt(userDetails);
}
if (authentication.getCredentials() == null) {
logger.debug("Authentication failed: no credentials provided");
throw new BadCredentialsException(messages.getMessage(
"AbstractUserDetailsAuthenticationProvider.badCredentials",
"Bad credentials"));
}
String presentedPassword = authentication.getCredentials().toString();
if (!passwordEncoder.isPasswordValid(userDetails.getPassword(),
presentedPassword, salt)) {
logger.debug("Authentication failed: password does not match stored value"); throw new BadCredentialsException(messages.getMessage(
"AbstractUserDetailsAuthenticationProvider.badCredentials",
"Bad credentials"));
}
}
密碼匹配成功的話，若是配置了userCache將把user數據放入Cache，例如Redis或者memecahced等。最終將調用createSuccessAuthentication()生成token。createSuccessAuthentication()方法代碼以下：
/**
* Creates a successful {@link Authentication} object.
* <p>
* Protected so subclasses can override.
* </p>
* <p>
* Subclasses will usually store the original credentials the user supplied (not
* salted or encoded passwords) in the returned <code>Authentication</code> object.
* </p>
*
* @param principal that should be the principal in the returned object (defined by
* the {@link #isForcePrincipalAsString()} method)
* @param authentication that was presented to the provider for validation
* @param user that was loaded by the implementation
*
* @return the successful authentication token
*/
protected Authentication createSuccessAuthentication(Object principal,
Authentication authentication, UserDetails user) {
// Ensure we return the original credentials the user supplied,
// so subsequent attempts are successful even with encoded passwords.
// Also ensure we return the original getDetails(), so that future
// authentication events after cache expiry contain the details
UsernamePasswordAuthenticationToken result = new UsernamePasswordAuthenticationToken(
principal, authentication.getCredentials(),
authoritiesMapper.mapAuthorities(user.getAuthorities()));
result.setDetails(authentication.getDetails());
return result;
}
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