如何在 python 中的活动连接上启动 TLS?

220 2.0.0 Ready to start TLS

from socket import *
import ssl
msg = "
 smtp.."
endmsg = "
.
"

# Mailserver hostname and port to be used.
mailserver = ("smtp.gmail.com", 587)


# Create a socket and create an active TCP connection with the mailserver
clientSocket = socket(AF_INET, SOCK_STREAM);
clientSocket.connect(mailserver)

# Read server response
recv = clientSocket.recv(1024)
print recv
if recv[:3] != '220':
    print '220 reply not received from server.'

# Send EHLO command and print server response.
ehloCommand = 'EHLO smtp.google.com
'
clientSocket.send(ehloCommand)

recv1 = clientSocket.recv(1024)
print recv1
if recv1[:3] != '250':
    print '250 reply not received from server.'

# Send STARTTLS command to server and print server response
command = "STARTTLS
"
clientSocket.send(command)

recv1 = clientSocket.recv(1024)
print recv1
if recv[:3] != '220':
    print '220 reply not received from server.'

# SEND AUTH LOGIN command and Base64 encoded username
command = "AUTH LOGIN xxxxxxxxxxxxx
"
clientSocket.send(command)

recv1 = clientSocket.recv(1024)
print recv1

解决方案

你可以ssl封装一个连接的socket.这会给你一个想法:

import ssl
import base64
from socket import *


cc = socket(AF_INET, SOCK_STREAM)
cc.connect(("smtp.gmail.com", 587))
# cc.read(..)

cc.send('helo tester.com
')
cc.send('starttls
')
# cc.read(..) If the server responds ok to starttls
#             tls negotiation needs to happen and all
#             communication is then over the SSL socket 

scc = ssl.wrap_socket(cc, ssl_version=ssl.PROTOCOL_SSLv23)
scc.send('auth login
')
# scc.read(..)

scc.send(base64.b64encode('username')+'
')
scc.send(base64.b64encode('password')+'
')

# css.send(
#  mail from:
#  rcpt to:
#  data
#  etc