From f1a2d69968126f8ce6bf2f28b40d239a95b34169 Mon Sep 17 00:00:00 2001
From: Josh Cummings <josh.cummings@gmail.com>
Date: Mon, 30 Dec 2019 09:17:25 -0700
Subject: [PATCH] Add AuthenticationProvider List Configurability

Issue gh-5185
---
 .../security/config/http/AuthenticationConfigBuilder.java      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/config/src/main/java/org/springframework/security/config/http/AuthenticationConfigBuilder.java b/config/src/main/java/org/springframework/security/config/http/AuthenticationConfigBuilder.java
index 5c63745649..7ec2cc4cd9 100644
--- a/config/src/main/java/org/springframework/security/config/http/AuthenticationConfigBuilder.java
+++ b/config/src/main/java/org/springframework/security/config/http/AuthenticationConfigBuilder.java
@@ -167,6 +167,7 @@ final class AuthenticationConfigBuilder {
 	private BeanDefinition authorizationCodeGrantFilter;
 	private BeanReference authorizationCodeAuthenticationProviderRef;
 
+	private final List<BeanReference> authenticationProviders = new ManagedList<>();
 	private final Map<BeanDefinition, BeanMetadataElement> defaultDeniedHandlerMappings = new ManagedMap<>();
 	private final Map<BeanDefinition, BeanMetadataElement> defaultEntryPointMappings = new ManagedMap<>();
 	private final List<BeanDefinition> csrfIgnoreRequestMatchers = new ManagedList<>();
@@ -1013,6 +1014,8 @@ final class AuthenticationConfigBuilder {
 			providers.add(authorizationCodeAuthenticationProviderRef);
 		}
 
+		providers.addAll(this.authenticationProviders);
+
 		return providers;
 	}