Ensure cryptographic mechanisms are used to protect the integrity of audit tools

alt0() { o=$(bash -c '#!/usr/bin/env bash

{
   a_output=();a_output2=();a_output3=();a_parlist=()
   l_systemd_analyze="$(whereis systemd-analyze | awk '"'"'{print $2}'"'"')"
   a_audit_files=("auditctl" "auditd" "ausearch" "aureport" "autrace" "augenrules")
   f_parameter_chk()
   {
      for l_tool_file in "${a_parlist[@]}"; do
         if grep -Pq -- '"'"'\b'"'"'"$l_tool_file"'"'"'\b'"'"' <<< "${!A_out[*]}"; then
            for l_string in "${!A_out[@]}"; do
               l_check="$(grep -Po -- '"'"'^\h*(\/usr)?\/sbin\/'"'"'"$l_tool_file"'"'"'\b'"'"' <<< "$l_string")"
               if [ -n "$l_check" ]; then
                  l_fname="$(printf '"'"'%s'"'"' "${A_out[$l_string]}")"
                  [ "$l_check" != "$(readlink -f "$l_check")" ] && \
                  a_output3+=("  - \"$l_check\" should be updated to: \"$(readlink -f "$l_check")\"" "    in: \"$l_fname\"")
                  a_missing=()
                  for l_var in "${a_items[@]}"; do
                     if ! grep -Pq -- "\b$l_var\b" <<< "$l_string"; then
                        a_missing+=("\"$l_var\"")
                     fi
                  done
                  if [ "${#a_missing[@]}" -gt 0 ]; then
                     a_output2+=(" - Option(s): ( ${a_missing[*]} ) are missing from: \"$l_tool_file\" in: \"$l_fname\"")
                  else
                     a_output+=(" - Audit tool file \"$l_tool_file\" exists as:" " \"$l_string\"" "   in the configuration file: \"$l_fname\"")
                  fi
               fi
            done
         else
            a_output2+=(" - Audit tool file \"$l_tool_file\" doesn'"'"'t exist in an AIDE configuration file")
         fi
      done
   }
   f_aide_conf()
   {
      l_config_file="$(whereis aide.conf | awk '"'"'{print $2}'"'"')"
      if [ -f "$l_config_file" ]; then
         a_items=("p" "i" "n" "u" "g" "s" "b" "acl" "xattrs" "sha512")
         declare -A A_out
         while IFS= read -r l_out; do
            if grep -Pq -- '"'"'^\h*\#\h*\/[^#\n\r]+\.conf\b'"'"' <<< "$l_out"; then
               l_file="${l_out//# /}"
            else
               for i in "${a_parlist[@]}"; do
                  grep -Pq -- '"'"'^\h*(\/usr)?\/sbin\/'"'"'"$i"'"'"'\b'"'"' <<< "$l_out" && A_out+=(["$l_out"]="$l_file")
               done
            fi
         done < <("$l_systemd_analyze" cat-config "$l_config_file" | grep -Pio '"'"'^\h*([^#\n\r]+|#\h*\/[^#\n\r\h]+\.conf\b)'"'"')
         if [ "${#A_out[@]}" -gt 0 ]; then
            f_parameter_chk
         else
            a_output2+=(" - No audit tool files are configured in an AIDE configuration file")
         fi
      else
         a_output2+=(" - AIDE configuration file not found." "   Please verify AIDE is installed on the system")
      fi
   }
   for l_audit_file in "${a_audit_files[@]}"; do
      if [ -f "$(readlink -f "/sbin/$l_audit_file")" ]; then
         a_parlist+=("$l_audit_file")
      else
         a_output+=(" - Audit tool file \"$(readlink -f "/sbin/$l_audit_file")\" doesn'"'"'t exist")
      fi
   done
   [ "${#a_parlist[@]}" -gt 0 ] && f_aide_conf
   if [ "${#a_output2[@]}" -le 0 ]; then
      printf '"'"'%s\n'"'"' "" "- Audit Result:" "  ** PASS **" "${a_output[@]}"
      [ "${#a_output3[@]}" -gt 0 ] && printf '"'"'%s\n'"'"' "" "  ** WARNING **" "${a_output3[@]}"
   else
      printf '"'"'%s\n'"'"' "" "- Audit Result:" "  ** FAIL **" "  * Reasons for audit failure *" "${a_output2[@]}" ""
      [ "${#a_output3[@]}" -gt 0 ] && printf '"'"'%s\n'"'"' "" "  ** WARNING **" "${a_output3[@]}"
      [ "${#a_output[@]}" -gt 0 ] && printf '"'"'%s\n'"'"' "- Correctly set:" "${a_output[@]}"
   fi
}' 2>&1); printf '%s\n' "$o" | grep -q '\*\* PASS \*\*' || { echo "step1: script did not report PASS"; return 1; }; }; if alt0; then echo compliant; fi

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