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Merge pull request #195 from globaldatanet/4.1.1
4.1.1
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| import json | ||
| import logging | ||
| import os | ||
| import urllib.request | ||
| import boto3 | ||
|
|
||
| wafv2 = boto3.client('wafv2') | ||
|
|
||
| HOOK_URL = os.environ['WebhookUrl'] | ||
| MESSENGER = os.environ['Messenger'] | ||
|
|
||
| logger = logging.getLogger() | ||
| logger.setLevel(logging.INFO) | ||
|
|
||
|
|
||
| def get_latest_default_rule_set_version(rule_set_name): | ||
| try: | ||
| response = wafv2.list_available_managed_rule_group_versions(Name=rule_set_name, Scope='REGIONAL', VendorName='AWS') | ||
| DefaultVersion = response.get('CurrentDefaultVersion') | ||
| return DefaultVersion | ||
| except Exception as e: | ||
| print('Error getting the default version for the rule set:', str(e)) | ||
| return None | ||
|
|
||
|
|
||
| def format_slack_message(data, latest_default_rule_set_version): | ||
| payload = { | ||
| 'username': f"WAF {data['Type']}", | ||
| 'icon_emoji': ':managedrule:', | ||
| 'text': f"{data['Subject']}", | ||
| 'attachments': [ | ||
| { | ||
| 'fallback': "Detailed information on {data['Type']}.", | ||
| 'color': 'green', | ||
| 'title': data['Subject'], | ||
| 'text': data['Message'], | ||
| 'fields': [ | ||
| { | ||
| 'title': 'Managed Rule Group', | ||
| 'value': data['MessageAttributes']['managed_rule_group']['Value'], | ||
| 'short': True | ||
| }, | ||
| { | ||
| 'title': 'Default Version', | ||
| 'value': latest_default_rule_set_version, | ||
| 'short': True | ||
| }, | ||
| { | ||
| 'title': 'Info', | ||
| 'value': "AWS WAF sets the default version to the static version recommended by the provider. Default version is automatically updated when the provider recommends a new version.", | ||
| 'short': False | ||
| } | ||
| ] | ||
| } | ||
| ] | ||
| } | ||
| return payload | ||
|
|
||
|
|
||
| def format_teams_message(data, latest_default_rule_set_version): | ||
| message = { | ||
| "type":"message", | ||
| "attachments":[ | ||
| { | ||
| "contentType":"application/vnd.microsoft.card.adaptive", | ||
| "contentUrl": "", | ||
| "content":{ | ||
| "$schema": "http://adaptivecards.io/schemas/adaptive-card.json", | ||
| "type": "AdaptiveCard", | ||
| "msteams": { | ||
| "width": "Full" | ||
| }, | ||
| "version": "1.4", | ||
| "body": [ | ||
| { | ||
| "type": "TextBlock", | ||
| "text": f"{data['Subject']}", | ||
| "size": "Large", | ||
| "weight": "Bolder", | ||
| "wrap": True | ||
| }, | ||
| { | ||
| "type": "TextBlock", | ||
| "text": f"{data['Message']}", | ||
| "separator": True, | ||
| "wrap": True | ||
| }, | ||
| { | ||
| "type": "FactSet", | ||
| "facts": [ | ||
| { | ||
| "title": "Managed Rule Group", | ||
| "value": data['MessageAttributes']['managed_rule_group']['Value'] | ||
| }, | ||
| { | ||
| "title": "Default Version", | ||
| "value": latest_default_rule_set_version | ||
| } | ||
| ], | ||
| "separator": True | ||
| }, | ||
| { | ||
| "type": "TextBlock", | ||
| "text": f"AWS WAF sets the default version to the static version recommended by the provider. Default version is automatically updated when the provider recommends a new version.", | ||
| "separator": True, | ||
| "wrap": True | ||
| } | ||
| ] | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| return message | ||
|
|
||
|
|
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| def notify(url, payload): | ||
| data = json.dumps(payload).encode('utf-8') | ||
| method = 'POST' | ||
| headers = {'Content-Type': 'application/json'} | ||
|
|
||
| request = urllib.request.Request(url, data = data, method = method, headers = headers) | ||
| with urllib.request.urlopen(request) as response: | ||
| return response.read().decode('utf-8') | ||
|
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||
|
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| def lambda_handler(event, context): | ||
| logger.info("Message: " + str(event)) | ||
| for(record) in event['Records']: | ||
| default_version = get_latest_default_rule_set_version(record['Sns']['MessageAttributes']['managed_rule_group']['Value']) | ||
| if(MESSENGER == "Slack"): | ||
| payload = format_slack_message(record['Sns'], default_version) | ||
| elif(MESSENGER == "Teams"): | ||
| payload = format_teams_message(record['Sns'], default_version) | ||
| response = notify(HOOK_URL, payload) | ||
| print(response) | ||
|
|
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