Hier ist eine vollständige Implementierung eines keytab in Java verwenden.
import javax.security.auth.Subject;
import javax.security.auth.kerberos.KerberosPrincipal;
import javax.security.auth.login.AppConfigurationEntry;
import javax.security.auth.login.Configuration;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
import java.security.Principal;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
public class SecurityUtils {
public static class LoginConfig extends Configuration {
private String keyTabLocation;
private String servicePrincipalName;
private boolean debug;
public LoginConfig(String keyTabLocation, String servicePrincipalName, boolean debug) {
this.keyTabLocation = keyTabLocation;
this.servicePrincipalName = servicePrincipalName;
this.debug = debug;
}
@Override
public AppConfigurationEntry[] getAppConfigurationEntry(String name) {
HashMap<String, String> options = new HashMap<String, String>();
options.put("useKeyTab", "true");
options.put("keyTab", this.keyTabLocation);
options.put("principal", this.servicePrincipalName);
options.put("storeKey", "true");
options.put("doNotPrompt", "true");
if (this.debug) {
options.put("debug", "true");
}
options.put("isInitiator", "false");
return new AppConfigurationEntry[]{new AppConfigurationEntry("com.sun.security.auth.module.Krb5LoginModule",
AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, options),};
}
}
public static Subject loginAs(String keyTabLocation, String servicePrincipal) {
try {
LoginConfig loginConfig = new LoginConfig(keyTabLocation, servicePrincipal, true);
Set<Principal> princ = new HashSet<Principal>(1);
princ.add(new KerberosPrincipal(servicePrincipal));
Subject sub = new Subject(false, princ, new HashSet<Object>(), new HashSet<Object>());
LoginContext lc;
lc = new LoginContext("", sub, null, loginConfig);
lc.login();
return lc.getSubject();
} catch (LoginException e) {
e.printStackTrace();
}
return null;
}
}
Die loginAs Methode kehren Sie ein Thema, das verwendet werden kann, eine privilegierte Aktion auszuführen:
result = Subject.doAs(subject,
new PrivilegedExceptionAction<NamingEnumeration<SearchResult>>() {
public NamingEnumeration<SearchResult> run() throws NamingException {
return context.search(directoryBase, filterBuilder.toString(), searchCtls);
}
});