Add assertions to X509Configurer

Signed-off-by: Max Batischev <[email protected]>

Author: franticticktick

config/src/main/java/org/springframework/security/config/annotation/web/configurers/X509Configurer.java

@@ -108,6 +108,7 @@ public X509Configurer() {
 	 * @return the {@link X509Configurer} for further customizations
 	 */
 	public X509Configurer<H> x509AuthenticationFilter(X509AuthenticationFilter x509AuthenticationFilter) {
+		Assert.notNull(x509AuthenticationFilter, "x509AuthenticationFilter cannot be null");
 		this.x509AuthenticationFilter = x509AuthenticationFilter;
 		return this;
 	}
@@ -118,6 +119,7 @@ public X509Configurer<H> x509AuthenticationFilter(X509AuthenticationFilter x509A
 	 * @return the {@link X509Configurer} to use
 	 */
 	public X509Configurer<H> x509PrincipalExtractor(X509PrincipalExtractor x509PrincipalExtractor) {
+		Assert.notNull(x509PrincipalExtractor, "x509PrincipalExtractor cannot be null");
 		this.x509PrincipalExtractor = x509PrincipalExtractor;
 		return this;
 	}
@@ -129,6 +131,7 @@ public X509Configurer<H> x509PrincipalExtractor(X509PrincipalExtractor x509Princ
 	 */
 	public X509Configurer<H> authenticationDetailsSource(
 			AuthenticationDetailsSource<HttpServletRequest, PreAuthenticatedGrantedAuthoritiesWebAuthenticationDetails> authenticationDetailsSource) {
+		Assert.notNull(authenticationDetailsSource, "authenticationDetailsSource cannot be null");
 		this.authenticationDetailsSource = authenticationDetailsSource;
 		return this;
 	}
@@ -155,6 +158,7 @@ public X509Configurer<H> userDetailsService(UserDetailsService userDetailsServic
 	 */
 	public X509Configurer<H> authenticationUserDetailsService(
 			AuthenticationUserDetailsService<PreAuthenticatedAuthenticationToken> authenticationUserDetailsService) {
+		Assert.notNull(authenticationUserDetailsService, "authenticationUserDetailsService cannot be null");
 		this.authenticationUserDetailsService = authenticationUserDetailsService;
 		return this;
 	}