Fix allOf/anyOf Abstain Logic

Closes gh-13487

Author: jzheaux

core/src/main/java/org/springframework/security/authorization/AuthorizationManagers.java

@@ -41,11 +41,17 @@ public static <T> AuthorizationManager<T> anyOf(AuthorizationManager<T>... manag
 			List<AuthorizationDecision> decisions = new ArrayList<>();
 			for (AuthorizationManager<T> manager : managers) {
 				AuthorizationDecision decision = manager.check(authentication, object);
-				if (decision == null || decision.isGranted()) {
+				if (decision == null) {
+					continue;
+				}
+				if (decision.isGranted()) {
 					return decision;
 				}
 				decisions.add(decision);
 			}
+			if (decisions.isEmpty()) {
+				return new AuthorizationDecision(false);
+			}
 			return new CompositeAuthorizationDecision(false, decisions);
 		};
 	}
@@ -64,11 +70,17 @@ public static <T> AuthorizationManager<T> allOf(AuthorizationManager<T>... manag
 			List<AuthorizationDecision> decisions = new ArrayList<>();
 			for (AuthorizationManager<T> manager : managers) {
 				AuthorizationDecision decision = manager.check(authentication, object);
-				if (decision != null && !decision.isGranted()) {
+				if (decision == null) {
+					continue;
+				}
+				if (!decision.isGranted()) {
 					return decision;
 				}
 				decisions.add(decision);
 			}
+			if (decisions.isEmpty()) {
+				return new AuthorizationDecision(true);
+			}
 			return new CompositeAuthorizationDecision(true, decisions);
 		};
 	}

core/src/test/java/org/springframework/security/authorization/AuthorizationManagersTests.java

@@ -36,12 +36,14 @@ void checkAnyOfWhenOneGrantedThenGrantedDecision() {
 		assertThat(decision.isGranted()).isTrue();
 	}
 
+	// gh-13069
 	@Test
-	void checkAnyOfWhenOneAbstainedThenAbstainedDecision() {
+	void checkAnyOfWhenAllNonAbstainingDeniesThenDeniedDecision() {
 		AuthorizationManager<?> composed = AuthorizationManagers.anyOf((a, o) -> new AuthorizationDecision(false),
 				(a, o) -> null);
 		AuthorizationDecision decision = composed.check(null, null);
-		assertThat(decision).isNull();
+		assertThat(decision).isNotNull();
+		assertThat(decision.isGranted()).isFalse();
 	}
 
 	@Test
@@ -61,8 +63,9 @@ void checkAllOfWhenAllGrantedThenGrantedDecision() {
 		assertThat(decision.isGranted()).isTrue();
 	}
 
+	// gh-13069
 	@Test
-	void checkAllOfWhenOneAbstainedThenGrantedDecision() {
+	void checkAllOfWhenAllNonAbstainingGrantsThenGrantedDecision() {
 		AuthorizationManager<?> composed = AuthorizationManagers.allOf((a, o) -> new AuthorizationDecision(true),
 				(a, o) -> null);
 		AuthorizationDecision decision = composed.check(null, null);