1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
#!/usr/bin/python3
"""
PowerDNS <-> Mailcow DKIM Public Key patching script.
Created and Last modified: 13/09/2021 by Georg Pfuetzenreuter <georg@lysergic.dev>
Example use cases:
- Administration failure caused individual zones to contain faulty DKIM records
- Automation failure caused individual zones to contain faulty DKIM records
- Security incident required replacing DKIM private keys
- Security audit required manipulating the DKIM records of selected zones
The public key provided by Mailcow is considered as the source of truth.
"""
import requests
import sys
import os
from dotenv import load_dotenv
if len(sys.argv) > 1:
domain = sys.argv[1]
else:
print("Specify the domain name")
sys.exit(1)
load_dotenv()
# POWERDNS SETTINGS
ENDPOINT_PDNS = os.environ.get('ENDPOINT_PDNS')
APIKEY_PDNS = os.environ.get('APIKEY_PDNS')
# MAILCOW SETTINGS
ENDPOINT_MAILCOW = os.environ.get('ENDPOINT_MAILCOW')
APIKEY_MAILCOW = os.environ.get('APIKEY_MAILCOW')
if None in (ENDPOINT_PDNS, APIKEY_PDNS, ENDPOINT_MAILCOW, APIKEY_MAILCOW):
print("Could not load environment variables. Please check your .env file.")
sys.exit(0)
print("Scanning " + domain)
# QUERY POWERDNS
URL = ENDPOINT_PDNS + '/api/v1/servers/localhost/zones/' + domain + './export'
try:
response = requests.get(
URL,
headers = {'accept': 'text/plain', 'X-API-Key': APIKEY_PDNS},
)
data = response.text
#print(data)
for record in data.split('\n'):
if '._domainkey' in record:
#print(record)
txtis = record.split('"')[1]
try:
txtis
except NameError:
print("No DKIM TXT record found.")
#else:
#print(txtis)
except requests.exceptions.ConnectionError as err:
print("Connection failed.")
sys.exit(1)
except requests.exceptions.HTTPError as err:
print(err)
sys.exit(1)
# QUERY MAILCOW (can I put cow emoji in comment?)
server = ENDPOINT_MAILCOW
api_key = APIKEY_MAILCOW
api = '/api/v1'
get = api + '/get'
URL = server + get + '/dkim/' + domain
try:
response = requests.get(
URL,
headers = {'accept': 'application/json', 'X-API-Key': api_key},
)
data = response.json()
selector = data['dkim_selector']
txtshould = data['dkim_txt']
length = data['length']
pubkey = data['pubkey']
#print(f"Domain: {domain}\nSelector: {selector}\nTXT: {txtshould}\nPublic Key: {pubkey}")
#print(txtshould)
except KeyError:
print("No or faulty DKIM lookup from Mailcow. ABORTING.")
sys.exit(1)
except requests.exceptions.ConnectionError as err:
print("Connection failed.")
sys.exit(1)
except requests.exceptions.HTTPError as err:
print(err)
sys.exit(1)
# COMPARE
if txtis == txtshould:
print(domain + ": All good!")
if txtis != txtshould:
print("Mismatch!")
print("Patching SPF and DMARC ...")
URL = ENDPOINT_PDNS + '/api/v1/servers/localhost/zones/' + domain + "."
payload = {
"rrsets": [{"name": domain + ".", "type": "TXT", "ttl": "3600", "changetype": "REPLACE", "records": [{"content": "\"v=spf1 mx a -all\"", "disabled": False, "name": domain + "."}, {"content": "\"v=DMARC1; p=reject; rua=mailto:system@lysergic.dev\"", "disabled": False, "name": domain + "."}]}]
}
response = requests.patch(
URL,
headers = {'accept': 'application/json', 'X-API-Key': APIKEY_PDNS, 'Content-Type': 'application/json'},
json = payload,
)
status = response.status_code
if status == 204:
print("SPF/DMARC: OK!")
elif status == 422:
print("SPF/DMARC: Failed:")
print(response.json())
sys.exit(1)
else:
print("Unhandled error.")
print(status)
print(response.json())
sys.exit(1)
print("Patching DKIM ...")
payload = {
"rrsets": [{"name": selector + "._domainkey." + domain + ".", "type": "TXT", "ttl": "3600", "changetype": "REPLACE", "records": [{"content": "\""+ txtshould + "\"", "disabled": False, "name": selector + "._domainkey." + domain + "."}]}]
}
response = requests.patch(
URL,
headers = {'accept': 'application/json', 'X-API-Key': APIKEY_PDNS, 'Content-Type': 'application/json'},
json = payload,
)
status = response.status_code
if status == 204:
print("DKIM: OK!")
elif status == 422:
print("DKIM: Failed:")
print(response.json())
sys.exit(1)
else:
print("Unhandled error.")
print(status)
print(response.json())
sys.exit(1)
print("Done.")
sys.exit(0)
|
