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Merge pull request #8511 from eelhazati/master

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BAEL-3583: JAAS
This commit is contained in:
Eric Martin 2020-03-13 22:32:44 -05:00 committed by GitHub
commit fa70cdafd6
10 changed files with 200 additions and 0 deletions
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17
core-java-modules/core-java-security-2/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<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-2</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-security-2</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-java</relativePath>
</parent>
</project>

24
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/ConsoleCallbackHandler.java Normal file
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package com.baeldung.jaas;
import javax.security.auth.callback.*;
import java.io.Console;
import java.io.IOException;
public class ConsoleCallbackHandler implements CallbackHandler {
@Override
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
Console console = System.console();
for (Callback callback : callbacks) {
if (callback instanceof NameCallback) {
NameCallback nameCallback = (NameCallback) callback;
nameCallback.setName(console.readLine(nameCallback.getPrompt()));
} else if (callback instanceof PasswordCallback) {
PasswordCallback passwordCallback = (PasswordCallback) callback;
passwordCallback.setPassword(console.readPassword(passwordCallback.getPrompt()));
} else {
throw new UnsupportedCallbackException(callback);
}
}
}
}

13
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/JaasAuthentication.java Normal file
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package com.baeldung.jaas;
import javax.security.auth.Subject;
import javax.security.auth.login.LoginException;
public class JaasAuthentication {
public static void main(String[] args) throws LoginException {
LoginService loginService = new LoginService();
Subject subject = loginService.login();
System.out.println(subject.getPrincipals().iterator().next() + " sucessfully logeed in");
}
}

17
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/JaasAuthorization.java Normal file
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package com.baeldung.jaas;
import javax.security.auth.Subject;
import javax.security.auth.login.LoginException;
import java.security.PrivilegedAction;
public class JaasAuthorization {
public static void main(String[] args) throws LoginException {
LoginService loginService = new LoginService();
Subject subject = loginService.login();
PrivilegedAction privilegedAction = new ResourceAction();
Subject.doAsPrivileged(subject, privilegedAction, null);
}
}

14
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/LoginService.java Normal file
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package com.baeldung.jaas;
import javax.security.auth.Subject;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
public class LoginService {
public Subject login() throws LoginException {
LoginContext loginContext = new LoginContext("jaasApplication", new ConsoleCallbackHandler());
loginContext.login();
return loginContext.getSubject();
}
}

15
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/ResourceAction.java Normal file
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package com.baeldung.jaas;
import java.security.PrivilegedAction;
public class ResourceAction implements PrivilegedAction {
@Override
public Object run() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new ResourcePermission("test_resource"));
}
System.out.println("I have access to test_resource !");
return null;
}
}

9
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/ResourcePermission.java Normal file
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package com.baeldung.jaas;
import java.security.BasicPermission;
public class ResourcePermission extends BasicPermission {
public ResourcePermission(String name) {
super(name);
}
}

74
core-java-modules/core-java-security-2/src/main/java/com/baeldung/jaas/loginmodule/InMemoryLoginModule.java Normal file
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package com.baeldung.jaas.loginmodule;
import com.sun.security.auth.UserPrincipal;
import javax.security.auth.Subject;
import javax.security.auth.callback.*;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
import java.io.IOException;
import java.security.Principal;
import java.util.Map;
public class InMemoryLoginModule implements LoginModule {
private static final String USERNAME = "testuser";
private static final String PASSWORD = "testpassword";
private Subject subject;
private CallbackHandler callbackHandler;
private Map<String, ?> sharedState;
private Map<String, ?> options;
private String username;
private boolean loginSucceeded = false;
private Principal userPrincipal;
@Override
public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String, ?> sharedState,
Map<String, ?> options) {
this.subject = subject;
this.callbackHandler = callbackHandler;
this.sharedState = sharedState;
this.options = options;
}
@Override
public boolean login() throws LoginException {
NameCallback nameCallback = new NameCallback("username: ");
PasswordCallback passwordCallback = new PasswordCallback("password: ", false);
try {
callbackHandler.handle(new Callback[]{nameCallback, passwordCallback});
username = nameCallback.getName();
String password = new String(passwordCallback.getPassword());
if (USERNAME.equals(username) && PASSWORD.equals(password)) {
loginSucceeded = true;
}
} catch (IOException | UnsupportedCallbackException e) {
throw new LoginException("Can't login");
}
return loginSucceeded;
}
@Override
public boolean commit() throws LoginException {
if (!loginSucceeded) {
return false;
}
userPrincipal = new UserPrincipal(username);
subject.getPrincipals().add(userPrincipal);
return true;
}
@Override
public boolean abort() throws LoginException {
logout();
return true;
}
@Override
public boolean logout() throws LoginException {
subject.getPrincipals().remove(userPrincipal);
return false;
}
}

3
core-java-modules/core-java-security-2/src/main/resources/jaas/jaas.login.config Normal file
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jaasApplication {
com.baeldung.jaas.loginmodule.InMemoryLoginModule required debug=true;
};

14
core-java-modules/core-java-security-2/src/main/resources/jaas/jaas.policy Normal file
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grant codebase "file:./target/core-java-security-2-0.1.0-SNAPSHOT.jar" {
permission javax.security.auth.AuthPermission "createLoginContext.jaasApplication";
permission javax.security.auth.AuthPermission "doAsPrivileged";
permission java.lang.RuntimePermission "readFileDescriptor";
permission java.lang.RuntimePermission "writeFileDescriptor";
};
grant codebase "file:./target/core-java-security-2-0.1.0-SNAPSHOT.jar" {
permission javax.security.auth.AuthPermission "modifyPrincipals";
};
grant principal com.sun.security.auth.UserPrincipal "testuser" {
permission com.baeldung.jaas.ResourcePermission "test_resource";
};