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BAEL-1529 Intro to the Java SecurityManager (#7697)

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Denis 2019-09-04 21:30:42 +08:00 committed by Grzegorz Piwowarek
parent c4a1b44b39
commit 73743acb30
5 changed files with 101 additions and 0 deletions
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34
core-java-modules/core-java-security-manager/pom.xml Normal file
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@ -0,0 +1,34 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-security-manager</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>core-java-security-manager</name>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
</project>

13
core-java-modules/core-java-security-manager/src/main/java/com/baeldung/security/manager/CustomPermission.java Normal file
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package com.baeldung.security.manager;
import java.security.BasicPermission;
public class CustomPermission extends BasicPermission {
public CustomPermission(String name) {
super(name);
}
public CustomPermission(String name, String actions) {
super(name, actions);
}
}

18
core-java-modules/core-java-security-manager/src/main/java/com/baeldung/security/manager/Service.java Normal file
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package com.baeldung.security.manager;
public class Service {
public static final String OPERATION = "my-operation";
public void operation() {
SecurityManager securityManager = System.getSecurityManager();
if (securityManager != null) {
securityManager.checkPermission(new CustomPermission(OPERATION));
}
System.out.println("Operation is executed");
}
public static void main(String[] args) {
new Service().operation();
}
}

35
core-java-modules/core-java-security-manager/src/test/java/com/baeldung/security/manager/SecurityManagerUnitTest.java Normal file
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package com.baeldung.security.manager;
import org.junit.Test;
import java.net.URL;
import java.security.AccessControlException;
import java.util.concurrent.Callable;
public class SecurityManagerUnitTest {
@Test(expected = AccessControlException.class)
public void whenSecurityManagerIsActive_thenNetworkIsNotAccessibleByDefault() throws Exception {
doTest(() -> {
new URL("http://www.google.com").openConnection().connect();
return null;
});
}
@Test(expected = AccessControlException.class)
public void whenUnauthorizedClassTriesToAccessProtectedOperation_thenAnExceptionIsThrown() throws Exception {
doTest(() -> {
new Service().operation();
return null;
});
}
private void doTest(Callable<Void> action) throws Exception {
System.setSecurityManager(new SecurityManager());
try {
action.call();
} finally {
System.setSecurityManager(null);
}
}
}

1
core-java-modules/pom.xml
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@ -19,6 +19,7 @@
<module>core-java-optional</module>
<module>core-java-lang-operators</module>
<module>core-java-networking-2</module>
<module>core-java-security-manager</module>
</modules>
</project>