private JarFile getCachedJarFile(URL url) {
    JarFile result = (JarFile) fileCache.get(url);

    /* if the JAR file is cached, the permission will always be there */
    if (result != null) {
      Permission perm = getPermission(result);
      if (perm != null) {
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
          try {
            sm.checkPermission(perm);
          } catch (SecurityException se) {
            // fallback to checkRead/checkConnect for pre 1.2
            // security managers
            if ((perm instanceof java.io.FilePermission)
                && perm.getActions().indexOf("read") != -1) {
              sm.checkRead(perm.getName());
            } else if ((perm instanceof java.net.SocketPermission)
                && perm.getActions().indexOf("connect") != -1) {
              sm.checkConnect(url.getHost(), url.getPort());
            } else {
              throw se;
            }
          }
        }
      }
    }
    return result;
  }
Beispiel #2
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 // security check to see whether the caller can perform attach
 private void checkProcessAttach(int pid) {
   SecurityManager sm = System.getSecurityManager();
   if (sm != null) {
     String os = System.getProperty("os.name");
     try {
       // Whether the caller can perform link against SA native library?
       checkNativeLink(sm, os);
       if (os.equals("SunOS") || os.equals("Linux")) {
         // Whether the caller can read /proc/<pid> file?
         sm.checkRead("/proc/" + pid);
       }
     } catch (SecurityException se) {
       throw new SecurityException("permission denied to attach to " + pid);
     }
   }
 }