Merge branch '2.3.x' into 2.4.x

Closes gh-26260

buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java

@@ -147,6 +147,10 @@ class JavaConventions {
 		project.getTasks().withType(Test.class, (test) -> {
 			test.useJUnitPlatform();
 			test.setMaxHeapSize("1024M");
+			if (buildingWithJava8(project)) {
+				test.systemProperty("java.security.properties",
+						getClass().getClassLoader().getResource("jdk-8156584-security.properties"));
+			}
 		});
 		project.getPlugins().withType(JavaPlugin.class, (javaPlugin) -> project.getDependencies()
 				.add(JavaPlugin.TEST_RUNTIME_ONLY_CONFIGURATION_NAME, "org.junit.platform:junit-platform-launcher"));
@@ -159,6 +163,10 @@ class JavaConventions {
 				}));
 	}
 
+	private boolean buildingWithJava8(Project project) {
+		return (!project.hasProperty("buildJavaHome")) && JavaVersion.current() == JavaVersion.VERSION_1_8;
+	}
+
 	private boolean isCi() {
 		return Boolean.parseBoolean(System.getenv("CI"));
 	}

buildSrc/src/main/resources/jdk-8156584-security.properties

+keystore.pkcs12.keyProtectionAlgorithm=PBEWithHmacSHA256AndAES_256
\ No newline at end of file