Copilot commented on code in PR #290: URL: https://github.com/apache/shiro-site/pull/290#discussion_r2772182563
########## src/site/content/forums.adoc: ########## @@ -29,7 +17,6 @@ ____ ____ -== GitHub Discussions - -For questions, ideas, and general community discussion, please use https://github.com/apache/shiro/discussions[GitHub Discussions]. +== Mailing Lists Review Comment: Grammatical error in the sentence. The phrase "For users that prefer to browse the mailing lists with a browser can use" is awkward because it uses both "For users that" (which doesn't need "can") and "can use" together. This should be either: - "For users that prefer to browse the mailing lists with a browser, we recommend using https://lists.apache.org/[ASF Lists] (Pony Mail)." - "Users that prefer to browse the mailing lists with a browser can use https://lists.apache.org/[ASF Lists] (Pony Mail)." ########## src/site/content/authenticator.adoc: ########## @@ -1,8 +1,110 @@ -= Authenticator -:jbake-type: lend_a_hand +[#Authenticator-UnderstandingAuthenticators] += Apache Shiro Authenticators +:jbake-date: 2010-03-18 00:00:00 +:jbake-type: page :jbake-status: published -:jbake-tags: documentation, todo, lend-a-hand +:jbake-tags: authenticator, authentication, security, realms +:jbake-description: Understanding Apache Shiro Authenticators - the component responsible for verifying user identity. Learn how Authenticators work with Realms and AuthenticationStrategies. :idprefix: :icons: font +:toc: -TODO +An `Authenticator` is a component responsible for verifying that a user actually is who they claim to be. +It is the core component that executes the authentication process on behalf of the link:/subject.html[Subject]. + +While the link:/authentication.html[Authentication] documentation explains the concepts and workflow of authentication in Shiro, +the Authenticator represents the actual implementation component that performs identity verification. + +[#Authenticator-Role] +== Role in the SecurityManager + +The link:/securitymanager.html[SecurityManager] does not perform authentication directly. +Instead, it delegates authentication requests to its internal `Authenticator` instance. +When a link:/subject.html[Subject] calls link:/static/current/apidocs/org/apache/shiro/subject/Subject.html#login(org.apache.shiro.authc.AuthenticationToken)[`login(token)`], +the SecurityManager receives the request and immediately delegates to the Authenticator by calling +link:/static/current/apidocs/org/apache/shiro/authc/Authenticator.html#authenticate(org.apache.shiro.authc.AuthenticationToken)[`authenticate(token)`]. + +The Authenticator takes the submitted link:/static/current/apidocs/org/apache/shiro/authc/AuthenticationToken.html[`AuthenticationToken`] +and uses it to verify the Subject's identity. +If verification succeeds, it returns an link:/static/current/apidocs/org/apache/shiro/authc/AuthenticationInfo.html[`AuthenticationInfo`] object. +If verification fails, it throws an link:/static/current/apidocs/org/apache/shiro/authc/AuthenticationException.html[`AuthenticationException`]. + +[#Authenticator-ModularRealmAuthenticator] +== ModularRealmAuthenticator + +Shiro uses the link:/static/current/apidocs/org/apache/shiro/authc/pam/ModularRealmAuthenticator.html[`ModularRealmAuthenticator`] +by default. +This implementation supports coordinating one or more link:/realm.html[Realms] during the authentication process. + +When an authentication token is submitted, the ModularRealmAuthenticator: + +* Iterates through configured Realms +* Calls each Realm's link:/static/current/apidocs/org/apache/shiro/realm/Realm.html#supports(org.apache.shiro.authc.AuthenticationToken)[`supports(token)`] method to determine if the Realm can process the token +* If a Realm supports the token, its link:/static/current/apidocs/org/apache/shiro/realm/Realm.html#getAuthenticationInfo(org.apache.shiro.authc.AuthenticationToken)[`getAuthenticationInfo(token)`] method is invoked +* Returns authentication information if successful, or throws an exception if failed + +[#Authenticator-SingleVsMultipleRealms] +== Single vs. Multiple Realms + +The ModularRealmAuthenticator supports both configurations: + +*Single Realm*: +When only one Realm is configured, the Authenticator directly invokes that Realm to verify the Subject's credentials. + +*Multiple Realms*: +When multiple Realms are configured, the Authenticator uses an link:/static/current/apidocs/org/apache/shiro/authc/pam/AuthenticationStrategy.html[`AuthenticationStrategy`] +to determine how to coordinate authentication across the Realms. +This is a link:https://en.wikipedia.org/wiki/Pluggable_Authentication_Modules[PAM]-style approach where each Realm can be consulted in sequence. + +[#Authenticator-AuthenticationStrategy] +== AuthenticationStrategy + +When multiple Realms are configured, the Authenticator must determine if the overall authentication attempt succeeds or fails. +The link:/static/current/apidocs/org/apache/shiro/authc/pam/AuthenticationStrategy.html[`AuthenticationStrategy`] makes this determination. + +Shiro provides three built-in strategies: + +* *FirstSuccessfulStrategy*: Returns the first Realm that succeeds. Other Realms are not consulted. +* *AtLeastOneSuccessfulStrategy*: Returns success if at least one Realm succeeds. Other Realms continue to be consulted. +* *AllSuccessfulStrategy*: All Realms must succeed for authentication to succeed. This is the most restrictive. + +You can configure which strategy the Authenticator uses, or implement your own strategy for custom behavior. + +[#Authenticator-Configuration] +== Configuration + +You can configure a custom Authenticator in your Shiro configuration if needed: + +[source,ini] +---- +authenticator = com.foo.bar.CustomAuthenticator +securityManager.authenticator = $authenticator +---- + +You can also configure the AuthenticationStrategy: + +[source,ini] +---- +authenticationStrategy = org.apache.shiro.authc.pam.FirstSuccessfulStrategy +authenticator.authenticationStrategy = $authenticationStrategy Review Comment: The configuration example shown here is incomplete and potentially misleading. The property path `authenticator.authenticationStrategy` will only work if a custom authenticator has been explicitly defined and assigned to the securityManager (as shown in lines 80-81). However, if using the default ModularRealmAuthenticator (which is the common case), the correct configuration would be `securityManager.authenticator.authenticationStrategy = $authenticationStrategy`. This inconsistency with the existing authentication.adoc documentation (which correctly shows `securityManager.authenticator.authenticationStrategy`) could cause configuration errors. Consider either: 1. Using the full path `securityManager.authenticator.authenticationStrategy` to be consistent with authentication.adoc 2. Or clarifying that this example assumes the custom authenticator from lines 80-81 is being used ```suggestion securityManager.authenticator.authenticationStrategy = $authenticationStrategy ``` ########## src/site/content/authenticator.adoc: ########## @@ -1,8 +1,110 @@ -= Authenticator -:jbake-type: lend_a_hand +[#Authenticator-UnderstandingAuthenticators] += Apache Shiro Authenticators +:jbake-date: 2010-03-18 00:00:00 +:jbake-type: page :jbake-status: published -:jbake-tags: documentation, todo, lend-a-hand +:jbake-tags: authenticator, authentication, security, realms +:jbake-description: Understanding Apache Shiro Authenticators - the component responsible for verifying user identity. Learn how Authenticators work with Realms and AuthenticationStrategies. :idprefix: :icons: font +:toc: -TODO +An `Authenticator` is a component responsible for verifying that a user actually is who they claim to be. +It is the core component that executes the authentication process on behalf of the link:/subject.html[Subject]. + +While the link:/authentication.html[Authentication] documentation explains the concepts and workflow of authentication in Shiro, +the Authenticator represents the actual implementation component that performs identity verification. + +[#Authenticator-Role] +== Role in the SecurityManager + +The link:/securitymanager.html[SecurityManager] does not perform authentication directly. +Instead, it delegates authentication requests to its internal `Authenticator` instance. +When a link:/subject.html[Subject] calls link:/static/current/apidocs/org/apache/shiro/subject/Subject.html#login(org.apache.shiro.authc.AuthenticationToken)[`login(token)`], +the SecurityManager receives the request and immediately delegates to the Authenticator by calling +link:/static/current/apidocs/org/apache/shiro/authc/Authenticator.html#authenticate(org.apache.shiro.authc.AuthenticationToken)[`authenticate(token)`]. + +The Authenticator takes the submitted link:/static/current/apidocs/org/apache/shiro/authc/AuthenticationToken.html[`AuthenticationToken`] +and uses it to verify the Subject's identity. +If verification succeeds, it returns an link:/static/current/apidocs/org/apache/shiro/authc/AuthenticationInfo.html[`AuthenticationInfo`] object. +If verification fails, it throws an link:/static/current/apidocs/org/apache/shiro/authc/AuthenticationException.html[`AuthenticationException`]. + +[#Authenticator-ModularRealmAuthenticator] +== ModularRealmAuthenticator + +Shiro uses the link:/static/current/apidocs/org/apache/shiro/authc/pam/ModularRealmAuthenticator.html[`ModularRealmAuthenticator`] +by default. +This implementation supports coordinating one or more link:/realm.html[Realms] during the authentication process. + +When an authentication token is submitted, the ModularRealmAuthenticator: + +* Iterates through configured Realms +* Calls each Realm's link:/static/current/apidocs/org/apache/shiro/realm/Realm.html#supports(org.apache.shiro.authc.AuthenticationToken)[`supports(token)`] method to determine if the Realm can process the token +* If a Realm supports the token, its link:/static/current/apidocs/org/apache/shiro/realm/Realm.html#getAuthenticationInfo(org.apache.shiro.authc.AuthenticationToken)[`getAuthenticationInfo(token)`] method is invoked +* Returns authentication information if successful, or throws an exception if failed + +[#Authenticator-SingleVsMultipleRealms] +== Single vs. Multiple Realms + +The ModularRealmAuthenticator supports both configurations: + +*Single Realm*: +When only one Realm is configured, the Authenticator directly invokes that Realm to verify the Subject's credentials. + +*Multiple Realms*: +When multiple Realms are configured, the Authenticator uses an link:/static/current/apidocs/org/apache/shiro/authc/pam/AuthenticationStrategy.html[`AuthenticationStrategy`] +to determine how to coordinate authentication across the Realms. +This is a link:https://en.wikipedia.org/wiki/Pluggable_Authentication_Modules[PAM]-style approach where each Realm can be consulted in sequence. + +[#Authenticator-AuthenticationStrategy] +== AuthenticationStrategy + +When multiple Realms are configured, the Authenticator must determine if the overall authentication attempt succeeds or fails. +The link:/static/current/apidocs/org/apache/shiro/authc/pam/AuthenticationStrategy.html[`AuthenticationStrategy`] makes this determination. + +Shiro provides three built-in strategies: + +* *FirstSuccessfulStrategy*: Returns the first Realm that succeeds. Other Realms are not consulted. Review Comment: The description of FirstSuccessfulStrategy is potentially misleading. The statement "Other Realms are not consulted" could be interpreted to mean that NO other realms are consulted at all, when in fact realms are consulted in order until one succeeds, and then the remaining realms are not consulted. The existing authentication.adoc documentation is clearer: "Only the information returned from the first successfully authenticated Realm will be used. All further Realms will be ignored." Consider revising to: "Returns the first Realm that succeeds. Remaining Realms are not consulted." or "Consults Realms in order until one succeeds. Remaining Realms are not consulted." ```suggestion * *FirstSuccessfulStrategy*: Consults Realms in order until one succeeds. Remaining Realms are not consulted. ``` -- This is an automated message from the Apache Git Service. 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