org.argeo.cms/src/org/argeo/cms/osgi/useradmin/OsUserUtils.java

   1 package org.argeo.cms.osgi.useradmin;
   2
   3 import java.net.URISyntaxException;
   4 import java.net.URL;
   5 import java.security.NoSuchAlgorithmException;
   6 import java.security.URIParameter;
   7
   8 import javax.security.auth.Subject;
   9 import javax.security.auth.login.Configuration;
  10 import javax.security.auth.login.LoginContext;
  11 import javax.security.auth.login.LoginException;
  12
  13 /** Log in based on JDK-provided OS integration. */
  14 public class OsUserUtils {
  15         private final static String LOGIN_CONTEXT_USER_NIX = "USER_NIX";
  16         private final static String LOGIN_CONTEXT_USER_NT = "USER_NT";
  17
  18         public static String getOsUsername() {
  19                 return System.getProperty("user.name");
  20         }
  21
  22         public static LoginContext loginAsSystemUser(Subject subject) {
  23                 try {
  24                         URL jaasConfigurationUrl = OsUserUtils.class.getClassLoader()
  25                                         .getResource("org/argeo/cms/osgi/useradmin/jaas-os.cfg");
  26                         URIParameter uriParameter = new URIParameter(jaasConfigurationUrl.toURI());
  27                         Configuration jaasConfiguration = Configuration.getInstance("JavaLoginConfig", uriParameter);
  28                         LoginContext lc = new LoginContext(isWindows() ? LOGIN_CONTEXT_USER_NT : LOGIN_CONTEXT_USER_NIX, subject,
  29                                         null, jaasConfiguration);
  30                         lc.login();
  31                         return lc;
  32                 } catch (URISyntaxException | NoSuchAlgorithmException | LoginException e) {
  33                         throw new RuntimeException("Cannot login as system user", e);
  34                 }
  35         }
  36
  37         public static void main(String args[]) {
  38                 Subject subject = new Subject();
  39                 LoginContext loginContext = loginAsSystemUser(subject);
  40                 System.out.println(subject);
  41                 try {
  42                         loginContext.logout();
  43                 } catch (LoginException e) {
  44                         // silent
  45                 }
  46         }
  47
  48         private static boolean isWindows() {
  49                 return System.getProperty("os.name").startsWith("Windows");
  50         }
  51
  52         private OsUserUtils() {
  53         }
  54 }