Difference between revisions of "Spf checker"
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import dns.resolver | import dns.resolver | ||
import smtplib | import smtplib | ||
Revision as of 09:52, 2 February 2023
import argparse import dns.resolver import smtplib
- Specify the DNS servers to be queried
dns.resolver.default_resolver = dns.resolver.Resolver(configure=False) dns.resolver.default_resolver.nameservers = ['8.8.8.8', '8.8.4.4' ]
substring="include" # If we find this we need to call the function again good_string="ip4" # If we find this we append the result to "the_result_l ist" another_good_string="ip6" # If we find this we append the result to "the_ result_list"
the_result_list = [] # The list to which the results will be appended
the_recursive_result_list = [] # The list to which the results will be append
ed
count = 0
def lookup(domain):
# print("in lookup")
try:
test_spf = dns.resolver.resolve(domain , 'TXT')
for dns_data in test_spf:
if 'spf1' in str(dns_data):
the_string = str(dns_data)
the_string = the_string.replace('"', ) # Removing quotes as they mess up queries
for i in the_string.split():
if substring in i:
the_result_list.append(i)
#new_search=i.split(":")
#new_domain=new_search[1]
##print("looking up" + new_domain)
#lookup(new_domain) # Recursive call
if good_string in i:
the_result_list.append(i)
if another_good_string in i:
the_result_list.append(i)
except:
print ("Some sort of failure has occurred")
pass
return(' '.join(the_result_list))
def recursive_lookup(domain):
# print("in recursive_lookup")
try:
test_spf = dns.resolver.resolve(domain , 'TXT')
for dns_data in test_spf:
if 'spf1' in str(dns_data):
the_string = str(dns_data)
the_string = the_string.replace('"', ) # Removing quotes as they mess up queries
for i in the_string.split():
if substring in i:
global count
count = count + 1
#the_resursive_result_list.append(i)
new_search=i.split(":")
new_domain=new_search[1]
#print("looking up" + new_domain)
recursive_lookup(new_domain) # Recursive call
if good_string in i:
the_recursive_result_list.append(i)
if another_good_string in i:
the_recursive_result_list.append(i)
except:
print ("Some sort of failure has occurred")
pass
return(' '.join(the_recursive_result_list))
def get_count():
global count return str(count)
def application(environment, start_response):
from webob import Request, Response
request = Request(environment) params = request.params post = request.POST
page = """
<html> <body>
Sender Policy Framework (SPF) Check</h2>
This is being served using mod_wsgi and WebOb
<form action="" method="POST">
Enter Domain: <input name="a" size="30" value="%s" />
<input type="submit" value="Lookup" />
</form
Normal lookup:
%s
Recursive lookup, expanding the "includes":
%sNumber of includes = %s
</body> </html> """ % (post.get('a'), "".join(lookup(post.get('a'))), "".join(recursive_lookup(post.get('a'))), get_count())
response = Response(body = page,
content_type = "text/html",
charset = "utf8",
status = "200 OK")
global count
#print("count is " + str(count))
count = 0
the_result_list.clear()
the_recursive_result_list.clear()
return response(environment, start_response)
</code></pre>
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