感谢这里的几个用户,我现在有一个(几乎)工作的SMTP服务器,支持根据需要从纯文本切换到TLS连接。基本服务器代码是:
from twisted.internet import ssl, protocol, defer, task, endpoints
from twisted.protocols.basic import LineReceiver
from twisted.python.modules import getModule
from OpenSSL.crypto import load_privatekey, load_certificate, FILETYPE_PEM
from custom_esmtp import mySMTP
def main(reactor):
caCertFile = open("/opt/tesa/etc/certs/CA/cacert.pem","r")
certFile = open("/opt/tesa/etc/certs/server/server.crt","r")
keyFile = open("/opt/tesa/etc/certs/server/server.key","r")
caCertData = caCertFile.read()
pKeyData = keyFile.read()
certData = certFile.read()
caCert = ssl.Certificate.loadPEM(caCertData)
cert = load_certificate(FILETYPE_PEM, certData)
pKey = load_privatekey(FILETYPE_PEM, pKeyData)
sslCtxFactory = ssl.CertificateOptions(privateKey=pKey, certificate=cert, trustRoot=caCert)
myESMTP = mySMTP(contextFactory=sslCtxFactory)
factory = protocol.Factory.forProtocol(lambda: mySMTP(contextFactory=sslCtxFactory))
endpoint = endpoints.TCP4ServerEndpoint(reactor, 8001)
endpoint.listen(factory)
return defer.Deferred()
if __name__ == '__main__':
import starttls_server
task.react(starttls_server.main)
如您所见 - 我创建了mySMTP类的对象实例(myESMTP)。这可能是因为你可能猜到的是(在custom_esmtp.py中)来自ESMTP的twisted.py-来自SMTP类 - 我们已经为myESMTP类写了几个函数重载,更多来。
但是,在twisted的mail.py中,SMTP类定义有一个方法" validateFrom":
def validateFrom(self, helo, origin):
<<snip>>
if self.portal:
result = self.portal.login(
cred.credentials.Anonymous(),
None,
IMessageDeliveryFactory, IMessageDelivery)
def ebAuthentication(err):
"""
Translate cred exceptions into SMTP exceptions so that the
protocol code which invokes C{validateFrom} can properly report
the failure.
"""
if err.check(cred.error.UnauthorizedLogin):
print ("Unauth Login")
exc = SMTPBadSender(origin)
elif err.check(cred.error.UnhandledCredentials):
exc = SMTPBadSender(
origin, resp="Unauthenticated senders not allowed")
else:
return err
return defer.fail(exc)
result.addCallbacks(
self._cbAnonymousAuthentication, ebAuthentication)
def continueValidation(ignored):
"""
Re-attempt from address validation.
"""
return self.validateFrom(helo, origin)
result.addCallback(continueValidation)
return result
raise SMTPBadSender(origin)
因此,如果定义了self.portal,则该方法在退出if条件之前返回 - 但如果未定义,则会引发SMTPBadSender错误。并且在SMTP类定义中没有任何地方定义门户。
我注意到self.portal 在 init 方法中为SMTPFactory类定义了 - 我们应该以某种方式使用它 - 如果是这样的话,可以有人解释这将如何影响我们的服务器代码?也就是说,即便如此,似乎并没有将自我设置为任何东西,而是有意义的......#...
def init (self,portal = None): self.portal = portal
也许这是SMTP类定义中的一个错误?似乎不太可能......也许我们只需要创建我们自己的validateFrom重写版本,并删除代码以在self.portal未定义时引发错误?尽管如此,我已经尝试过 - (删除在if块之外生成错误的2行代码) - 结果是&#34;不常见&#34; ....
mail from: me@localhost
250 Sender address accepted
rcpt to:you@somedomain.test
503 Must have sender before recipient
一如既往地感谢!
答案 0 :(得分:0)
所以我发现了一个简单的答案 - 只需在我们的自定义ESMTP类中为ValidateFrom和ValidateTo创建重载定义!工作得很好......但我并不是100%相信这是最正确的#34;正确的#34;解决方案 - 我现在可以将我的ehlo,邮件和rcpt提交给......但是当我尝试提交&#34;数据&#34;:
2014-10-15 09:49:40+0000 [mySMTP,0,127.0.0.1] Unhandled Error
Traceback (most recent call last):
File "/usr/lib64/python2.6/site-packages/twisted/internet/tcp.py", line 220, in _dataReceived
rval = self.protocol.dataReceived(data)
File "/usr/lib64/python2.6/site-packages/twisted/protocols/basic.py", line 454, in dataReceived
self.lineReceived(line)
File "/usr/lib64/python2.6/site-packages/twisted/mail/smtp.py", line 568, in lineReceived
return getattr(self, 'state_' + self.mode)(line)
File "/usr/lib64/python2.6/site-packages/twisted/mail/smtp.py", line 582, in state_COMMAND
method('')
--- <exception caught here> ---
File "/usr/lib64/python2.6/site-packages/twisted/mail/smtp.py", line 733, in do_DATA
msg = msgFunc()
exceptions.AttributeError: User instance has no __call__ method
我仍然想知道我是否应该以某种方式使用SMTPFactory ....我知道在答案中提出问题并不是一个好习惯,所以我将其留作&# 34;如果有人有更好的建议,请说出来!&#34;