188 lines
6.9 KiB
Python
188 lines
6.9 KiB
Python
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import smtplib, sys
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import argparse
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import os
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import uuid
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import imaplib
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from datetime import datetime, timedelta
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import email
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import time
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RETRY = 100
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def _send_mail(smtp_host, smtp_port, from_addr, from_pwd, to_addr, subject, starttls):
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print("Sending mail with subject '{}'".format(subject))
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message = "\n".join([
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"From: {from_addr}",
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"To: {to_addr}",
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"Subject: {subject}",
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"",
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"This validates our mail server can send to Gmail :/"]).format(
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from_addr=from_addr,
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to_addr=to_addr,
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subject=subject)
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retry = RETRY
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while True:
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with smtplib.SMTP(smtp_host, port=smtp_port) as smtp:
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if starttls:
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smtp.starttls()
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if from_pwd is not None:
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smtp.login(from_addr, from_pwd)
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try:
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smtp.sendmail(from_addr, [to_addr], message)
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return
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except smtplib.SMTPResponseException as e:
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# This is a service unavailable error
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# In this situation, we want to retry.
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if e.smtp_code == 451:
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if retry > 0:
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retry = retry - 1
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time.sleep(1)
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continue
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else:
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print("Error while sending mail: %s" % e)
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exit(5)
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except Exception as e:
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print("Error while sending mail: %s" % e)
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exit(4)
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def _read_mail(
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imap_host,
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imap_port,
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imap_username,
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to_pwd,
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subject,
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ignore_dkim_spf,
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show_body=False,
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delete=True):
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print("Reading mail from %s" % imap_username)
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message = None
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obj = imaplib.IMAP4_SSL(imap_host, imap_port)
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obj.login(imap_username, to_pwd)
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obj.select()
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today = datetime.today()
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cutoff = today - timedelta(days=1)
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dt = cutoff.strftime('%d-%b-%Y')
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for _ in range(0, RETRY):
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print("Retrying")
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obj.select()
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typ, data = obj.search(None, '(SINCE %s) (SUBJECT "%s")'%(dt, subject))
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if data == [b'']:
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time.sleep(1)
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continue
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uids = data[0].decode("utf-8").split(" ")
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if len(uids) != 1:
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print("Warning: %d messages have been found with subject containing %s " % (len(uids), subject))
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# FIXME: we only consider the first matching message...
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uid = uids[0]
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_, raw = obj.fetch(uid, '(RFC822)')
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if delete:
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obj.store(uid, '+FLAGS', '\\Deleted')
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obj.expunge()
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message = email.message_from_bytes(raw[0][1])
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print("Message with subject '%s' has been found" % message['subject'])
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if show_body:
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for m in message.get_payload():
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if m.get_content_type() == 'text/plain':
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print("Body:\n%s" % m.get_payload(decode=True).decode('utf-8'))
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break
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if message is None:
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print("Error: no message with subject '%s' has been found in INBOX of %s" % (subject, imap_username))
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exit(1)
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if ignore_dkim_spf:
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return
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# gmail set this standardized header
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if 'ARC-Authentication-Results' in message:
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if "dkim=pass" in message['ARC-Authentication-Results']:
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print("DKIM ok")
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else:
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print("Error: no DKIM validation found in message:")
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print(message.as_string())
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exit(2)
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if "spf=pass" in message['ARC-Authentication-Results']:
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print("SPF ok")
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else:
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print("Error: no SPF validation found in message:")
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print(message.as_string())
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exit(3)
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else:
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print("DKIM and SPF verification failed")
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exit(4)
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def send_and_read(args):
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src_pwd = None
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if args.src_password_file is not None:
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src_pwd = args.src_password_file.readline().rstrip()
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dst_pwd = args.dst_password_file.readline().rstrip()
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if args.imap_username != '':
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imap_username = args.imap_username
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else:
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imap_username = args.to_addr
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subject = "{}".format(uuid.uuid4())
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_send_mail(smtp_host=args.smtp_host,
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smtp_port=args.smtp_port,
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from_addr=args.from_addr,
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from_pwd=src_pwd,
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to_addr=args.to_addr,
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subject=subject,
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starttls=args.smtp_starttls)
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_read_mail(imap_host=args.imap_host,
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imap_port=args.imap_port,
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imap_username=imap_username,
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to_pwd=dst_pwd,
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subject=subject,
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ignore_dkim_spf=args.ignore_dkim_spf)
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def read(args):
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_read_mail(imap_host=args.imap_host,
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imap_port=args.imap_port,
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to_addr=args.imap_username,
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to_pwd=args.imap_password,
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subject=args.subject,
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ignore_dkim_spf=args.ignore_dkim_spf,
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show_body=args.show_body,
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delete=False)
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parser = argparse.ArgumentParser()
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subparsers = parser.add_subparsers()
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parser_send_and_read = subparsers.add_parser('send-and-read', description="Send a email with a subject containing a random UUID and then try to read this email from the recipient INBOX.")
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parser_send_and_read.add_argument('--smtp-host', type=str)
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parser_send_and_read.add_argument('--smtp-port', type=str, default=25)
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parser_send_and_read.add_argument('--smtp-starttls', action='store_true')
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parser_send_and_read.add_argument('--from-addr', type=str)
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parser_send_and_read.add_argument('--imap-host', required=True, type=str)
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parser_send_and_read.add_argument('--imap-port', type=str, default=993)
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parser_send_and_read.add_argument('--to-addr', type=str, required=True)
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parser_send_and_read.add_argument('--imap-username', type=str, default='', help="username used for imap login. If not specified, the to-addr value is used")
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parser_send_and_read.add_argument('--src-password-file', type=argparse.FileType('r'))
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parser_send_and_read.add_argument('--dst-password-file', required=True, type=argparse.FileType('r'))
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parser_send_and_read.add_argument('--ignore-dkim-spf', action='store_true', help="to ignore the dkim and spf verification on the read mail")
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parser_send_and_read.set_defaults(func=send_and_read)
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parser_read = subparsers.add_parser('read', description="Search for an email with a subject containing 'subject' in the INBOX.")
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parser_read.add_argument('--imap-host', type=str, default="localhost")
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parser_read.add_argument('--imap-port', type=str, default=993)
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parser_read.add_argument('--imap-username', required=True, type=str)
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parser_read.add_argument('--imap-password', required=True, type=str)
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parser_read.add_argument('--ignore-dkim-spf', action='store_true', help="to ignore the dkim and spf verification on the read mail")
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parser_read.add_argument('--show-body', action='store_true', help="print mail text/plain payload")
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parser_read.add_argument('subject', type=str)
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parser_read.set_defaults(func=read)
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args = parser.parse_args()
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args.func(args)
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