changeset 7968:d7e79f8eb943

issue2551350 - Python changes for 3.12 with roundup 2.3.0 mailer.py Fix due to change in smtplib.SMTP.starttls() signature. As of 3.3 it can use an optional ssl context argument for certificates/keys. In 3.12 it dropped legacy support for specifing cert/key files as arguments and requires a context. I modified Andrew's original patch to initialize SSLContext with ssl.PROTOCOL_TLS_CLIENT. If there is a cert file specified, enable check_hostname - verify that the cert supplied by the server matches the hostname we supplied. If there is no cert file call load_default_certs() Also opened issue2551351 to look into more SMTP ssmtp tightening. We also should have an option in Roundup to use TLS/SSL (smtps) without using starttls. Note that this code is untested by the test suite due to the need to setup an SMTP server with STARTTLS support. issue2551351 has some notes on this.
author John Rouillard <rouilj@ieee.org>
date Wed, 15 May 2024 00:08:05 -0400
parents 70703d22c79a
children ebcda75b7adb
files CHANGES.txt roundup/mailer.py
diffstat 2 files changed, 16 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/CHANGES.txt	Tue May 14 23:06:38 2024 -0400
+++ b/CHANGES.txt	Wed May 15 00:08:05 2024 -0400
@@ -145,6 +145,9 @@
 - issue2551350 - Python changes for 3.12 with roundup 2.3.0. Fixes for
   cgitb.py crash due to pydoc.html.header() signature change. (Patch
   by Andrew (kragacles), applied John Rouillard)
+- issue2551350 - Python changes for 3.12 with roundup 2.3.0. Fixes for
+  mailer.py crash due to change in starttls signature change. (Patch
+  by Andrew (kragacles), modified and applied John Rouillard)
 
 Features:
 
--- a/roundup/mailer.py	Tue May 14 23:06:38 2024 -0400
+++ b/roundup/mailer.py	Wed May 15 00:08:05 2024 -0400
@@ -6,6 +6,7 @@
 import os
 import smtplib
 import socket
+import ssl
 import sys
 import time
 import traceback
@@ -312,8 +313,18 @@
         # start the TLS if requested
         if config["MAIL_TLS"]:
             self.ehlo()
-            self.starttls(config["MAIL_TLS_KEYFILE"],
-                          config["MAIL_TLS_CERTFILE"])
+            if sys.version_info[0:2] >= (3, 6):
+                sslctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+                if config["MAIL_TLS_CERTFILE"]:
+                    sslctx.load_cert_chain(config["MAIL_TLS_CERTFILE"],
+                                           keyfile=config["MAIL_TLS_KEYFILE"])
+                    sslctx.check_hostname = True
+                else:
+                    sslctx.load_default_certs()
+                self.starttls(context=sslctx)
+            else:
+                self.starttls(config["MAIL_TLS_KEYFILE"],
+                              config["MAIL_TLS_CERTFILE"])
 
         # ok, now do we also need to log in?
         mailuser = config["MAIL_USERNAME"]

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