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

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