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45 lines
1.5 KiB
Plaintext
45 lines
1.5 KiB
Plaintext
[[servlet-authentication-userdetailsservice]]
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= UserDetailsService
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{security-api-url}org/springframework/security/core/userdetails/UserDetailsService.html[`UserDetailsService`] is used by xref:servlet/authentication/passwords/dao-authentication-provider.adoc#servlet-authentication-daoauthenticationprovider[`DaoAuthenticationProvider`] for retrieving a username, a password, and other attributes for authenticating with a username and password.
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Spring Security provides xref:servlet/authentication/passwords/in-memory.adoc#servlet-authentication-inmemory[in-memory] and xref:servlet/authentication/passwords/jdbc.adoc#servlet-authentication-jdbc[JDBC] implementations of `UserDetailsService`.
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You can define custom authentication by exposing a custom `UserDetailsService` as a bean.
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For example, the following listing customizes authentication, assuming that `CustomUserDetailsService` implements `UserDetailsService`:
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[NOTE]
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====
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This is only used if the `AuthenticationManagerBuilder` has not been populated and no `AuthenticationProviderBean` is defined.
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====
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.Custom UserDetailsService Bean
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[tabs]
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======
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Java::
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+
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[source,java,role="primary"]
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----
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@Bean
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CustomUserDetailsService customUserDetailsService() {
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return new CustomUserDetailsService();
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}
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----
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XML::
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+
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[source,java,role="secondary"]
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----
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<b:bean class="example.CustomUserDetailsService"/>
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----
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Kotlin::
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+
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[source,kotlin,role="secondary"]
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----
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@Bean
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fun customUserDetailsService() = CustomUserDetailsService()
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----
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======
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// FIXME: Add CustomUserDetails example with links to @AuthenticationPrincipal
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