python - Wireshark 不显示带有 Python SSL 套接字的 SSL 数据包

Question

我关注了Python SSL socket echo test with self-signed certificate博客来测试一个简单的 SSL 套接字连接。我生成了一个自签名证书，并使用上面的 Python 代码来尝试一下。

一切都按描述工作，但问题是，当我使用 Wireshark 监视网络数据包时，我没有看到任何 SSL 流量。我所看到的只是普通的 TCP 数据包，但我希望看到正在使用的 SSL 协议(protocol)。我错过了什么吗？

为了完整起见，我添加了代码:

客户端.py

import socket, ssl, pprint

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Require a certificate from the server. We used a self-signed certificate
# so here ca_certs must be the server certificate itself.
ssl_sock = ssl.wrap_socket(s,
                           ca_certs="server.crt",
                           cert_reqs=ssl.CERT_REQUIRED)

ssl_sock.connect(('localhost', 10023))

print repr(ssl_sock.getpeername())
print ssl_sock.cipher()
print pprint.pformat(ssl_sock.getpeercert())

ssl_sock.write("boo!")

if False: # from the Python 2.7.3 docs
    # Set a simple HTTP request -- use httplib in actual code.
    ssl_sock.write("""GET / HTTP/1.0\r
    Host: www.verisign.com\n\n""")

    # Read a chunk of data.  Will not necessarily
    # read all the data returned by the server.
    data = ssl_sock.read()

    # note that closing the SSLSocket will also close the underlying socket
    ssl_sock.close()

server.py

import socket, ssl

bindsocket = socket.socket()
bindsocket.bind(('', 10023))
bindsocket.listen(5)

def do_something(connstream, data):
    print "do_something:", data
    return False

def deal_with_client(connstream):
    data = connstream.read()
    while data:
        if not do_something(connstream, data):
            break
        data = connstream.read()

while True:
    newsocket, fromaddr = bindsocket.accept()
    connstream = ssl.wrap_socket(newsocket,
                                 server_side=True,
                                 certfile="server.crt",
                                 keyfile="server.key")
    try:
        deal_with_client(connstream)
    finally:
        connstream.shutdown(socket.SHUT_RDWR)
        connstream.close()

Wireshark 截图:

Answer 1

您看不到 SSL/TLS 的原因是您使用的端口与标准 443 不同。这就是 Wireshark 无法自动检测协议(protocol)的原因。您有两个选择:

• 将流量解码为 SSL:

Analyze > Decode As > Transport > SSL > Apply

• 添加您的端口:

Edit > Preferences > Protocols > HTTP > SSL/TLS Ports = 443, {port}