Difference between revisions of "Spf checker"
From MyWiki
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| + | <source lang="python"> | ||
import argparse | import argparse | ||
import dns.resolver | import dns.resolver | ||
Revision as of 09:53, 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> <h1>Sender Policy Framework (SPF) Check</h2> <p style="color:orange;">This is being served using mod_wsgi and WebOb</p> <p> <form action="" method="POST"> Enter Domain: <input name="a" size="30" value="%s" /> <input type="submit" value="Lookup" /> </form </p> <p><h3> Normal lookup:</h3> %s</p> <p><h3> Recursive lookup, expanding the "includes":</h3> %s</p> <p><h3> Number of includes = %s </h3></p> </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> </body>
