64 lines
2.4 KiB
ReStructuredText
64 lines
2.4 KiB
ReStructuredText
:mod:`ussl` -- ssl module
|
|
===============================
|
|
|
|
.. module:: ussl
|
|
:synopsis: TLS/SSL wrapper for socket objects
|
|
|
|
This module provides access to Transport Layer Security (often known as
|
|
“Secure Sockets Layer”) encryption and peer authentication facilities for
|
|
network sockets, both client-side and server-side.
|
|
|
|
Functions
|
|
---------
|
|
|
|
.. function:: ssl.wrap_socket(sock, keyfile=None, certfile=None, server_side=False, cert_reqs=CERT_NONE, ca_certs=None)
|
|
|
|
Takes an instance sock of socket.socket, and returns an instance of ssl.SSLSocket, a subtype of
|
|
``socket.socket``, which wraps the underlying socket in an SSL context. sock must be a ``SOCK_STREAM``
|
|
socket and protocol number ``socket.IPPROTO_SEC``; other socket types are unsupported. Example::
|
|
|
|
import socket
|
|
import ssl
|
|
s = socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_SEC)
|
|
ss = ssl.wrap_socket(s)
|
|
ss.connect(socket.getaddrinfo('www.google.com', 443)[0][-1])
|
|
|
|
Certificates must be used in order to validate the other side of the connection, and also to
|
|
authenticate ourselves with the other end. Such certificates must be stored as files using the
|
|
FTP server, and they must be placed in specific paths with specific names.
|
|
|
|
- The certificate to validate the other side goes in: **'/flash/cert/ca.pem'**
|
|
- The certificate to authenticate ourselves goes in: **'/flash/cert/cert.pem'**
|
|
- The key for our own certificate goes in: **'/flash/cert/private.key'**
|
|
|
|
.. note::
|
|
|
|
When these files are stored, they are placed inside the internal **hidden** file system
|
|
(just like firmware updates), and therefore they are never visible.
|
|
|
|
For instance to connect to the Blynk servers using certificates, take the file ``ca.pem`` located
|
|
in the `blynk examples folder <https://github.com/wipy/wipy/tree/master/examples/blynk>`_
|
|
and put it in '/flash/cert/'. Then do::
|
|
|
|
import socket
|
|
import ssl
|
|
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_SEC)
|
|
ss = ssl.wrap_socket(s, cert_reqs=ssl.CERT_REQUIRED, ca_certs='/flash/cert/ca.pem')
|
|
ss.connect(socket.getaddrinfo('cloud.blynk.cc', 8441)[0][-1])
|
|
|
|
SSL sockets inherit all methods and from the standard sockets, see the :mod:`usocket` module.
|
|
|
|
Exceptions
|
|
----------
|
|
|
|
.. data:: ssl.SSLError
|
|
|
|
Constants
|
|
---------
|
|
|
|
.. data:: ssl.CERT_NONE
|
|
.. data:: ssl.CERT_OPTIONAL
|
|
.. data:: ssl.CERT_REQUIRED
|
|
|
|
supported values in ``cert_reqs``
|