#!/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.
CHECK_ID_extra7162="7.162"
CHECK_TITLE_extra7162="[extra7162] Check if CloudWatch Log Groups have a retention policy of 365 days"
CHECK_SCORED_extra7162="NOT_SCORED"
CHECK_CIS_LEVEL_extra7162="EXTRA"
CHECK_SEVERITY_extra7162="Medium"
CHECK_ASFF_RESOURCE_TYPE_extra7162="AwsLogsLogGroup"
CHECK_ALTERNATE_check7162="extra7162"
CHECK_SERVICENAME_extra7162="cloudwatch"
CHECK_RISK_extra7162='If log groups have a low retention policy of less than 365 days; crucial logs and data can be lost'
CHECK_REMEDIATION_extra7162='Add Log Retention policy of 365 days to log groups. This will persist logs and traces for a long time.'
CHECK_DOC_extra7162='https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/AWS_Logs.html'
CHECK_CAF_EPIC_extra7162='Data Retention'

extra7162() {
    # "Check if CloudWatch Log Groups have a retention policy of 365 days"
    declare -i LOG_GROUP_RETENTION_PERIOD_DAYS=365
    for regx in $REGIONS; do
        LIST_OF_365_RETENTION_LOG_GROUPS=$($AWSCLI logs describe-log-groups $PROFILE_OPT --region $regx --query 'logGroups[?retentionInDays=="${LOG_GROUP_RETENTION_PERIOD_DAYS}"].[logGroupName]' --output text 2>&1)
        if [[ $(echo "$LIST_OF_365_RETENTION_LOG_GROUPS" | grep -E 'AccessDenied|UnauthorizedOperation|AuthorizationError') ]]; then
            textInfo "$regx: Access Denied trying to describe log groups" "$regx"
            continue
        fi
        if [[ $LIST_OF_365_RETENTION_LOG_GROUPS ]]; then
            for log in $LIST_OF_365_RETENTION_LOG_GROUPS; do
                textPass "$regx: $log Log Group has 365 days retention period!" "$regx" "$log"
            done
        fi
        LIST_OF_NON_365_RETENTION_LOG_GROUPS=$($AWSCLI logs describe-log-groups $PROFILE_OPT --region $regx --query 'logGroups[?retentionInDays!="${LOG_GROUP_RETENTION_PERIOD_DAYS}"].[logGroupName]' --output text)
        if [[ $LIST_OF_NON_365_RETENTION_LOG_GROUPS ]]; then
            for log in $LIST_OF_NON_365_RETENTION_LOG_GROUPS; do
                textFail "$regx: $log Log Group does not have 365 days retention period!" "$regx" "$log"
            done
        fi
        REGION_NO_LOG_GROUP=$($AWSCLI logs describe-log-groups $PROFILE_OPT --region $regx --output text)
        if [[ $REGION_NO_LOG_GROUP ]]; then
            :
        else
            textInfo "$regx does not have a Log Group!" "$regx"
    
        fi
    done
}