Improve listing of Checks and Groups

Change `-l` flag to print a unique list of every single check (assuming none are orphaned outside of all groups)
Allow `-g <group_id>` to be specified in combination with `-l`, to only print checks that are referenced by the specified group
When listing all checks with `-l` only, print out all groups that reference each check

Fixes: #545

README.md

@@ -108,9 +108,9 @@ This script has been written in bash using AWS-CLI and it works in Linux and OSX
     ./prowler
     ```
 
-    Use `-l` to list all available checks and group of checks (sections)
+    Use `-l` to list all available checks and the groups (sections) that reference them
 
-    If you want to avoid installing dependences run it using Docker:
+    If you want to avoid installing dependencies run it using Docker:
 
     ```sh
     docker run -ti --rm --name prowler --env AWS_ACCESS_KEY_ID --env AWS_SECRET_ACCESS_KEY --env AWS_SESSION_TOKEN toniblyx/prowler:latest
@@ -235,7 +235,7 @@ This script has been written in bash using AWS-CLI and it works in Linux and OSX
         -k                  keep the credential report
         -n                  show check numbers to sort easier
                                 (i.e.: 1.01 instead of 1.1)
-        -l                  list all available checks only (does not perform any check)
+        -l                  list all available checks only (does not perform any check). Add -g <group_id> to only list checks within the specified group
         -L                  list all groups (does not perform any check)
         -e                  exclude group extras
         -E                  execute all tests except a list of specified checks separated by comma (i.e. check21,check31)

include/outputs

@@ -130,15 +130,20 @@ textTitle(){
     *)       ITEM_LEVEL="Unspecified or Invalid";;
   esac
 
+  local group_ids
+  if [[ -n "$5" ]]; then
+    group_ids="$CYAN [$5] $NORMAL"
+  fi
+
   if [[ "${MODES[@]}" =~ "csv" ]]; then
       >&2 echo "$TITLE_ID $TITLE_TEXT" | tee -a $OUTPUT_FILE_NAME.$EXTENSION_CSV
   elif [[ "${MODES[@]}" =~ "json" || "${MODES[@]}" =~ "json-asff" ]]; then
     :
   else
     if [[ "$ITEM_SCORED" == "Scored" ]]; then
-      echo -e "\n$BLUE $TITLE_ID $NORMAL $TITLE_TEXT"
+      echo -e "\n$BLUE $TITLE_ID $NORMAL $TITLE_TEXT $group_ids"
     else
-      echo -e "\n$PURPLE $TITLE_ID $TITLE_TEXT $NORMAL"
+      echo -e "\n$PURPLE $TITLE_ID $TITLE_TEXT $NORMAL $group_ids"
     fi
   fi
 }

prowler

@@ -48,6 +48,7 @@ SEND_TO_SECURITY_HUB=0
 SCRIPT_START_TIME=$( date -u +"%Y-%m-%dT%H:%M:%S%z" )
 TITLE_ID=""
 TITLE_TEXT="CALLER ERROR - UNSET TITLE"
+TOTAL_CHECKS=()
 
 # Command usage menu
 usage(){
@@ -70,7 +71,7 @@ USAGE:
       -k                  keep the credential report
       -n                  show check numbers to sort easier
                             (i.e.: 1.01 instead of 1.1)
-      -l                  list all available checks only (does not perform any check)
+      -l                  list all available checks only (does not perform any check). Add -g <group_id> to only list checks within the specified group
       -L                  list all groups (does not perform any check)
       -e                  exclude group extras
       -E                  execute all tests except a list of specified checks separated by comma (i.e. check21,check31)
@@ -232,14 +233,37 @@ if [[ $EXTERNAL_CHECKS_PATH ]]; then
   done
 fi
 
-# Function to show the title of the check
+# Get a list of total checks available by ID
+for i in "${!GROUP_TITLE[@]}"; do
+  IFS=',' read -ra CHECKS <<< "${GROUP_CHECKS[$i]}"
+  for j in "${CHECKS[@]}"; do
+    TOTAL_CHECKS+=("$CHECK_ID_$j")
+  done
+done
+# Remove duplicates whilst preserving the order of checks, and store the result as an array
+TOTAL_CHECKS=($(echo "${TOTAL_CHECKS[*]}" | tr ' ' '\n' | awk '!seen[$0]++'))
+
+# Function to show the title of the check, and optionally which group(s) it belongs to
 # using this way instead of arrays to keep bash3 (osx) and bash4(linux) compatibility
 show_check_title() {
   local check_id=CHECK_ID_$1
   local check_title=CHECK_TITLE_$1
   local check_scored=CHECK_SCORED_$1
   local check_type=CHECK_TYPE_$1
-  textTitle "${!check_id}" "${!check_title}" "${!check_scored}" "${!check_type}"
+  local group_ids
+  # If requested ($2 is any non-null value) iterate all GROUP_CHECKS and produce a comma-separated list of all
+  # the GROUP_IDs that include this particular check
+  if [[ -n "$2" ]]; then
+    for i in "${!GROUP_ID[@]}"; do
+      if [[ "${GROUP_CHECKS[$i]}" =~ "$1" ]]; then
+        if [[ -n "$group_ids" ]]; then
+          group_ids+=", "
+        fi
+        group_ids+="${GROUP_ID[$i]}"
+      fi
+    done
+  fi
+  textTitle "${!check_id}" "${!check_title}" "${!check_scored}" "${!check_type}" "$group_ids"
 }
 
 # Function to show the title of a group, by numeric id
@@ -343,23 +367,40 @@ execute_all() {
 	done
 }
 
-# Function to show the titles of everything
+# Function to show the titles of either all checks or only those in the specified group
 show_all_titles() {
-  MAIN_GROUPS=(1 2 3 4 7)
+  local checks
-  for i in "${MAIN_GROUPS[@]}"; do
+  local check_id
-		show_group_title $i
+  local group_index
-		# Display the title of the checks in groups 1,2,3,4 and 7
+  # If '-g <group_id>' has been specified, only show the titles of checks within the specified group
-    # Any other group has checks in these groups
+  if [[ $GROUP_ID_READ ]];then
-		IFS=',' read -ra CHECKS <<< ${GROUP_CHECKS[$i]}
+    if [[ " ${GROUP_ID[@]} " =~ " ${GROUP_ID_READ} " ]]; then
-		for j in ${CHECKS[@]}; do
+      for group_index in "${!GROUP_ID[@]}"; do
-			show_check_title $j
+        if [ "${GROUP_ID[$group_index]}" == "${GROUP_ID_READ}" ]; then
+          show_group_title "$group_index"
+          IFS=',' read -ra checks <<< "${GROUP_CHECKS[$i]}"
+          for check_id in ${checks[@]}; do
+            show_check_title "$check_id"
           done
+        fi
       done
+    else
+      textFail "Use a valid check group ID i.e.: group1, extras, forensics-ready, etc."
+      show_all_group_titles
+      exit $EXITCODE
+    fi
+  else
+    for check_id in "${TOTAL_CHECKS[@]}"; do
+      # Pass 1 so that the group IDs that this check belongs to are printed
+      show_check_title "$check_id" 1
+    done
+  fi
 }
 
 show_all_group_titles() {
-	for i in "${!GROUP_TITLE[@]}"; do
+  local group_index
-		show_group_title $i
+  for group_index in "${!GROUP_TITLE[@]}"; do
+    show_group_title "$group_index"
   done
 }
 
@@ -373,16 +414,6 @@ get_all_checks_without_exclusion() {
   for E_CHECK in "${E_CHECKS[@]}"; do
     CHECKS_TO_EXCLUDE+=($E_CHECK)
   done
-  # Get a list of total checks available by ID
-  for i in "${!GROUP_TITLE[@]}"; do
-    # show_group_title $i
-    IFS=',' read -ra CHECKS <<< ${GROUP_CHECKS[$i]}
-    for j in ${CHECKS[@]}; do
-      TOTAL_CHECKS+=($CHECK_ID_$j)
-    done
-  done
-  # Remove duplicates whilst preserving the order of checks, and store the result as an array
-  TOTAL_CHECKS=($(echo "${TOTAL_CHECKS[*]}" | tr ' ' '\n' | awk '!seen[$0]++'))
   # Create a list that contains all checks but excluded ones
   for i in "${TOTAL_CHECKS[@]}"; do
     local COINCIDENCE=false