From fe8a123eadc54c0add827d0ee3ce220935a164ca Mon Sep 17 00:00:00 2001
From: Toni de la Fuente <toni.delafuente@alfresco.com>
Date: Wed, 31 Oct 2018 00:01:47 -0400
Subject: [PATCH] Added check extra730 - ACM cert expiration

---
 checks/check_extra730 | 43 +++++++++++++++++++++++++++++++++++++++++++
 include/os_detector   | 24 ++++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 checks/check_extra730

diff --git a/checks/check_extra730 b/checks/check_extra730
new file mode 100644
index 00000000..f91b9b27
--- /dev/null
+++ b/checks/check_extra730
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# Prowler - the handy cloud security tool (copyright 2018) by Toni de la Fuente
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy
+# of the License at http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed
+# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+
+DAYS_TO_EXPIRE_THRESHOLD="7"
+
+CHECK_ID_extra730="7.30"
+CHECK_TITLE_extra730="[extra730] Check if ACM Certificates are about to expire in $DAYS_TO_EXPIRE_THRESHOLD days or less (Not Scored) (Not part of CIS benchmark)"
+CHECK_SCORED_extra730="NOT_SCORED"
+CHECK_TYPE_extra730="EXTRA"
+CHECK_ALTERNATE_check730="extra730"
+
+extra730(){
+  # "Check if ACM Certificates are about to expire in $DAYS_TO_EXPIRE_THRESHOLD days or less"
+  for regx in $REGIONS; do
+    LIST_OF_ACM_CERTS=$($AWSCLI acm list-certificates $PROFILE_OPT --region $regx --query 'CertificateSummaryList[].CertificateArn' --output text)
+    if [[ $LIST_OF_ACM_CERTS ]];then
+      for cert in $LIST_OF_ACM_CERTS; do
+        CERT_DATA=$($AWSCLI acm describe-certificate --certificate-arn $cert --query 'Certificate.[DomainName,NotAfter]' --output text)
+        echo "$CERT_DATA" | while read FQDN NOTAFTER; do
+          EXPIRES_DATE=$(timestamp_to_date $NOTAFTER)
+          COUNTER_DAYS=$(how_many_days_from_today $EXPIRES_DATE)
+          if [[ $COUNTER_DAYS -le $DAYS_TO_EXPIRE_THRESHOLD ]]; then
+            textFail "$regx: Certificate for $FQDN is about to expire in $COUNTER_DAYS days!" "$regx"
+          else
+            textPass "$regx: Certificate for $FQDN expires in $COUNTER_DAYS days" "$regx"
+          fi
+        done
+      done
+    else
+      textInfo "$regx: No certificates found" "$regx"
+    fi
+  done
+}
diff --git a/include/os_detector b/include/os_detector
index 7c4a528a..1cbb368d 100644
--- a/include/os_detector
+++ b/include/os_detector
@@ -38,6 +38,14 @@ if [ "$OSTYPE" == "linux-gnu" ] || [ "$OSTYPE" == "linux-musl" ]; then
     {
       base64 -d
     }
+  how_many_days_from_today()
+      {
+        DATE_TO_COMPARE=$1
+        TODAY_IN_DAYS=$(date -d "$(date +%Y-%m-%d)" +%s)
+        DATE_IN_DAYS=$(date -d $DATE_TO_COMPARE +%s)
+        DAYS_TO=$((( $DATE_IN_DAYS - $TODAY_IN_DAYS )/60/60/24))
+        echo $DAYS_TO
+      }
 elif [[ "$OSTYPE" == "darwin"* ]]; then
   # BSD/OSX commands compatibility
   TEMP_REPORT_FILE=$(mktemp -t prowler.cred_report-XXXXXX)
@@ -60,6 +68,14 @@ elif [[ "$OSTYPE" == "darwin"* ]]; then
     {
       base64 -D
     }
+  how_many_days_from_today()
+      {
+        DATE_TO_COMPARE=$1
+        TODAY_IN_DAYS=$(date +%s)
+        DATE_IN_DAYS=$(date -jf %Y-%m-%d $DATE_TO_COMPARE +%s)
+        DAYS_TO=$((( $DATE_IN_DAYS - $TODAY_IN_DAYS )/60/60/24))
+        echo $DAYS_TO
+      }
 elif [[ "$OSTYPE" == "cygwin" ]]; then
   # POSIX compatibility layer and Linux environment emulation for Windows
   TEMP_REPORT_FILE=$(mktemp -t -p /tmp prowler.cred_report-XXXXXX)
@@ -82,6 +98,14 @@ elif [[ "$OSTYPE" == "cygwin" ]]; then
     {
       base64 -d
     }
+  how_many_days_from_today()
+      {
+        DATE_TO_COMPARE=$1
+        TODAY_IN_DAYS=$(date -d "$(date +%Y-%m-%d)" +%s)
+        DATE_IN_DAYS=$(date -d $DATE_TO_COMPARE +%s)
+        DAYS_TO=$((( $TODAY_IN_DAYS - $DATE_IN_DAYS )/60/60/24))
+        echo $DAYS_TO
+      }
 else
       echo "Unknown Operating System! Valid \$OSTYPE: linux-gnu, linux-musl, darwin* or cygwin"
       echo "Found: $OSTYPE"