Add a configuration option to configure max-items for large resources

This change adds a -m option which configures the --max-items API parameter for large
AWS resources. Currently, SNS topic subscriptions are limited to the default of 100
items. SNS topics can easily surpass 100,000 subscriptions which is too many to show
by default.

Since check 3.15 is confirming that subscribers exist - not what they actually are - it's
a waste to display all 100,000 entries.

prowler

@@ -49,6 +49,7 @@ WHITE=""
 PROFILE="default"
 REGION="us-east-1"
 FILTERREGION=""
+MAXITEMS=100
 
 # Command usage menu
 usage(){
@@ -59,12 +60,13 @@ usage(){
       -r <region>         specify an AWS region to direct API requests to (i.e.: us-east-1)
       -c <checknum>       specify a check number or group from the AWS CIS benchmark (i.e.: check11 for check 1.1 or check3 for entire section 3)
       -f <filterregion>   specify an AWS region to run checks against (i.e.: us-west-1)
+      -m <maxitems>       specify the maximum number of items to return for long-running requests (default: 100)
       -h                  this help
   "
   exit
 }
 
-while getopts "hp:r:c:f:" OPTION; do
+while getopts "hp:r:c:f:m:" OPTION; do
    case $OPTION in
      h )
         usage
@@ -82,6 +84,9 @@ while getopts "hp:r:c:f:" OPTION; do
      f )
         FILTERREGION=$OPTARG
         ;;
+     m )
+        MAXITEMS=$OPTARG
+        ;;
      : )
         echo -e "\n$RED ERROR!$NORMAL  -$OPTARG requires an argument\n"
         exit 1
@@ -1004,7 +1009,7 @@ check315(){
     TOPICS_LIST=$($AWSCLI sns list-topics --profile $PROFILE --region $regx --output text --query 'Topics[*].TopicArn')
     if [[ $TOPICS_LIST ]];then
         for topic in $TOPICS_LIST; do
-          CHECK_TOPIC_LIST=$($AWSCLI sns list-subscriptions-by-topic --topic-arn $topic --profile $PROFILE --region $regx --query 'Subscriptions[*].{Endpoint:Endpoint,Protocol:Protocol}' --output text)
+          CHECK_TOPIC_LIST=$($AWSCLI sns list-subscriptions-by-topic --topic-arn $topic --profile $PROFILE --region $regx --query 'Subscriptions[*].{Endpoint:Endpoint,Protocol:Protocol}' --output text --max-items $MAXITEMS | grep -v "None")
           if [[ $CHECK_TOPIC_LIST ]]; then
             TOPIC_SHORT=$(echo $topic | awk -F: '{ print $7 }')
             echo -e "     $NOTICE Region $regx with Topic $TOPIC_SHORT: $NORMAL "