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Privilege Manager for Unix 6.1 Common Documents - Administration Guide

One Identity Privileged Access Suite for Unix Introducing Privilege Manager for Unix Planning Deployment Installation and Configuration Upgrade Privilege Manager for Unix System Administration Managing Security Policy The Privilege Manager for Unix Security Policy Advanced Privilege Manager for Unix Configuration Administering Log and Keystroke Files InTrust Plug-in for Privilege Manager Troubleshooting Privilege Manager for Unix Policy File Components Privilege Manager Variables Privilege Manager for Unix Flow Control Statements Privilege Manager for Unix Built-in Functions and Procedures Privilege Manager programs Installation Packages

Lesson 6 Sample: Conditional keystroke logging

#=================================================================
# Privilege Manager example configuration file
# One Identity 2013
#
# Example File : example6
#
# This file should go in /etc/pm.conf with permissions of 600
# (rw-------).
# It must be owned by root.
#=================================================================
print("-------------- LESSON 6 DESCRIPTION --------------------");
os=osname();
printf("Policy file %s/examples/"+os+"/example6.conf\n",PMINST);
print("--------------------------------------------------------");
print("This lesson extends lesson 5 by adding some statements that cause");
printf("requests by %s, dan and robyn to be rejected if they arrive
outside\n",PMLESSON_USER);
print("of regular office hours (8AM until 5PM Monday to Friday).");
print("A message is printed to the user's screen if this happens.");
print("Once again examine the policy file, noting use of logical not
operator.");
print("Try altering the timebetween() and dayname tests and check the
results");
print("--------------------------------------------------------");
i=0;
while (i<argc)
   { printf("%s ",argv[i]); # Redisplay the original command line for clarity
      i=i+1;
   }
printf("\n");
#=================================================================
adminusers = {"dan", "robyn"};
adminprogs = {"ls", "hostname", "kill", "csh", "ksh", "pmreplay"};
adminusers=append(adminusers,PMLESSON_USER); #Add the lesson user to list
if (user in adminusers && command in adminprogs)
   { runuser = "root";
      if (command in {"csh", "ksh"})
         { iolog = mktemp("/var/adm/pm." + user + "." + command + ".XXXXXX");
            print("This command will be logged to:", iolog);
         }
      if (user in adminusers && (!timebetween(800,1700) || dayname in {"Sat",
"Sun"}))
         { print ("Sorry, you can't use that command outside office hours.");
            reject;
         }
         accept;
}
#=================================================================

See Lesson 6: Conditional keystroke logging for details on using this sample policy file.

Lesson 7 Sample: Policy optimizations

#=================================================================
# Privilege Manager example configuration file
# One Identity 2013
#
# Example File : example7
#
# This file should go in /etc/pm.conf with permissions of 600
# (rw-------).
# It must be owned by root.
#=================================================================
print("---------------- LESSON 7 DESCRIPTION -------------------");
os=osname();
printf("Policy file %s/examples/"+os+"/example7.conf\n",PMINST);
print("--------------------------------------------------------");
print("This lesson extends lesson 6 using variables to store
constraints");
print("which you might want to use several times in the policy file.");
print("Here, we set a variable to store whether or not it is currently");
print("within office hours or not. By storing it in a variable, we can
refer");
print("to it several times later on in the file if need be, without having");
print("enter and resolve the whole lengthly constraint each time.");
print("\nIn this example, there are two bits which we are interested in");
print("whether or not it is currently within office hours. The first bit is");
print("the same as in lesson 6, disallowing dan's requests outside of");
print("office hours. The second bit, near the end, requires the user");
print("to type in robyn's password if robyn makes a request outside of
normal");
print("office hours. This would be useful to protect against the situation");
print("where a user leaves a terminal logged in overnight.");
print("--------------------------------------------------------");
i=0;
while (i<argc)
   { printf("%s ",argv[i]); # Redisplay the original command line for clarity
      i=i+1;
   }
printf("\n");
#=================================================================
# Here, we set officehours to true if it is within office hours (8AM until 5PM
# Monday to Friday), false otherwise.
officehours = timebetween(800, 1700) && dayname !in {"Sat", "Sun"};
adminusers = {"dan", "robyn"};
adminprogs = {"ls", "hostname", "kill", "csh", "ksh"};
# Add the provided lesson user
adminusers=append(adminusers,PMLESSON_USER);
if (user in adminusers && command in adminprogs)
   { runuser = "root";
      if (command in {"csh", "ksh"})
         { iolog = mktemp("/var/adm/pm." + user + "." + command + ".XXXXXX");
            print("This command will be logged to:", iolog);
         }
      # Note how much more compact this is compared to example6.conf,
      # now that we can refer to the "officehours" variable.
      if (user == "dan" && !officehours)
         { print ("Sorry, you can't use that command outside office hours.");
         reject;
   }
   # Now we refer to "officehours" again. This time, if "robyn" is making
   # the request outside of office hours, robyn is asked to correctly
   # type in robyn's password. If it is not typed in correctly, the request
   # is rejected.
   if (user == "robyn" && !officehours)
      { if(!getuserpasswd(user)) reject;
      }
      accept;
}
#=================================================================

See Lesson 7: Policy optimizations for details on using this sample policy file.

Lesson 8 Sample: Controlling the execution environment

#=================================================================
# Privilege Manager example configuration file
# One Identity 2013
#
# Example File : example8
#
# This file should have permissions of 600
# (rw-------).
# It must be owned by root.
#=================================================================
#=================================================================
# This example shows how facets of a job's run-time operating
# environment can be set up using Privilege Manager.
# Although the policies listed here are arbitrary, their structure
# can be used as examples or how to implement your own real policies.
# For experimental purposes, replace "dan" and "robyn" with user
# names from your own site.
adminusers = {"dan", "robyn"};
adminprogs = {"ls", "hostname", "kill", "csh", "ksh", "echo"};
if (user in adminusers && command in adminprogs) {
   # What directory should this job run in? For this example, we
   # want to say that if the job is executed from any directory
   # under /usr, it can be allowed to execute in that directory.
   # If it is not being executed from a directory under /usr, it
   # should execute in /tmp.
   if(cwd != "/usr" && !glob("/usr/*", cwd))
      runcwd = "/tmp";
   # Do not allow more than 2 arguments to be specified to the
   # command. The range function is used here to return only the
   # first 3 arguments of the argv list. The first element is the
   # command name, the second element is the first argument to
   # the command, and the third element is the second argument
   # to the command.
   if(argc > 2)
      runargv = range(argv, 0, 2);
   # Require the request to run as root.
   runuser = "root";
   # Require the request to run in the "bin" group.
   rungroup = "bin";
   # if the command being run is "hostname", run that command on
   # whatever machine the user requests (by default, the same
   # machine that pmrun is run from, but this can be changed
   # using pmrun's -h argument). Otherwise, requests should only
   # run on the same machine that the pmrun request was
   # submitted from.
   if(command != "hostname")
      runhost = submithost;
   # Since environment variables can sometimes be used to
   # exploit security holes in UNIX programs and shell scripts,
   # we should be careful to set up the job's environment
   # variables safely. We start by deleting any and all
   # environment variables except those specified in the
   # following list.
   keepenv("TERM", "DISPLAY", "HOME", "TZ", "PWD", "WINDOWID",
   "COLUMNS", "LINES");
   # Next we explicitly set up the PATH variable, so that only
   # safe directories are on it. Note the use of + to
   # concatenate the value that we want to assign to the PATH
   # variable. We use + so that we can split it up over 2 lines
   # to avoid ugly end-of-line wrapping.
   setenv("PATH",
   "/usr/ucb:/bin:/usr/bin:/usr/local/bin:/usr/bin/X11:" +
   "/usr/X11/bin:/usr/etc:/etc:/usr/local/etc:/usr/sbin");
   # We ensure that the SHELL variable is set safely. If the
   # existing SHELL variable is set to a safe value, which we
   # define as any of /bin/sh, /bin/csh, or /bin/ksh, then we
   # use that value. If not, then we use /bin/sh.
   # Note: getenv reads from the "env" variable, setenv and
   # keepenv write to the "runenv" variable.
   safeshells = {"/bin/sh", "/bin/csh", "/bin/ksh"};
   if(getenv("SHELL") in safeshells)
      setenv("SHELL", getenv("SHELL"));
   else
      setenv("SHELL", "/bin/sh");
   # Set the command's umask to 022 -- this means that data
   # files created by the command will have rw-r--r--
   # permissions, and executable files will have rwxr-xr-x
   # permissions. Since the command will run as root, root will
   # own the files. Note that we specify a leading zero when
   # typing in umask values, so that the values will be interpreted in
   # octal.
   runumask = 022;
   # The command should run with a "nice" value of -4, so that it
   # runs with a high priority relative to other jobs on the
   # system.
   runnice = -4;
accept;
}
#=================================================================

See Lesson 8: Controlling the execution environment for details on using this sample policy file.

Lesson 9 Sample: Flow control

#=================================================================
# Privilege Manager example configuration file
# One Identity 2013
#
# Example File : example9
# This file should have permissions of 600
# (rw-------).
# It must be owned by root.
#=================================================================
#=================================================================
# This example shows how the switch and case statement can be used.
# In this case, we allow different users to act as system
# administrators on different days of the week.
# For experimental purposes, replace "dan", "cory", and "robyn" with
# user names from your own site.
adminprogs = {"ls", "hostname", "kill", "csh", "ksh", "echo"};
if (command in adminprogs) {
   switch (dayname) {
      case "Mon":
      case "Wed":
      case "Fri":
         adminusers = {"dan", "robyn"};
         break;
      case "Tue":
      case "Thu":
         adminusers = {"robyn", "cory"};
         break;
      default:
         adminusers = {};
   }
   if (user in adminusers) {
      runuser = "root";
         accept;
   }
}
#=================================================================

See Lesson 9: Flow control for details on using this sample policy file.

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