65 lines
2.5 KiB
Python
65 lines
2.5 KiB
Python
# hobo - portal to configure and deploy applications
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# Copyright (C) 2015-2016 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import dns.resolver
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import smtplib
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import socket
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from django.conf import settings
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from django.core.exceptions import ValidationError
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from django.utils.translation import ugettext_lazy as _
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def validate_email_address(value):
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email_domain = value.split('@')[-1]
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try:
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mx_server = dns.resolver.query(email_domain, 'MX')[0].exchange.to_text()
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except dns.resolver.NXDOMAIN as e:
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raise ValidationError(_('Error: %s') % str(e))
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except dns.resolver.NoAnswer as e:
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raise ValidationError(_('Error: %s') % str(e))
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smtp = smtplib.SMTP(timeout=30)
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try:
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smtp.connect(mx_server)
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except socket.error as e:
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raise ValidationError(_('Error while connecting to %(server)s: %(msg)s') % {'server': mx_server, 'msg': str(e)})
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status, msg = smtp.helo()
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if status != 250:
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smtp.quit()
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raise ValidationError(_('Error while connecting to %(server)s: %(msg)s') % {'server': mx_server, 'msg': msg})
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smtp.mail('')
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status, msg = smtp.rcpt(value)
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if status == 250:
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smtp.quit()
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return
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smtp.quit()
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raise ValidationError(_('Email address not found on %s') % mx_server)
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def validate_email_spf(value, strict=False):
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allowed_records = settings.ALLOWED_SPF_RECORDS
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email_domain = value.split('@')[-1]
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txt_records = sum([r.strings for r in dns.resolver.query(email_domain, 'TXT')], [])
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spf_records = [x for x in txt_records if x.startswith('v=spf1 ')]
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if not strict and not spf_records:
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return
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for spf_record in spf_records:
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if '+all' in spf_record:
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return
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for allowed_record in allowed_records:
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if allowed_record in spf_record:
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return
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raise ValidationError(_('No suitable SPF record found for %s') % email_domain)
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