Ray
parent
7a84c71e80
commit
9bf91c202a
|
|
@ -1,3 +1,9 @@
|
|||
2017-04-03 Ray Brown <ray@Virtor10>
|
||||
|
||||
Release 1.2.0
|
||||
|
||||
* README.md: Release updates
|
||||
|
||||
2017-04-02 Ray Brown <code@liquibits.com>
|
||||
|
||||
Release 1.2.0 Preparation
|
||||
|
|
|
|||
80
README.md
80
README.md
|
|
@ -1,6 +1,4 @@
|
|||
============================================
|
||||
Datagram Transport Layer Security for Python
|
||||
============================================
|
||||
# Datagram Transport Layer Security for Python
|
||||
|
||||
PyDTLS brings Datagram Transport Layer Security (DTLS - RFC 6347:
|
||||
http://tools.ietf.org/html/rfc6347) to the Python environment. In a
|
||||
|
|
@ -13,18 +11,23 @@ DTLS is now very easy to use in Python. If you're familiar with the
|
|||
ssl module in Python's standard library, you already know how. All it
|
||||
takes is passing a datagram/UDP socket to the *wrap_socket* function
|
||||
instead of a stream/TCP socket. Here's how one sets up the client side
|
||||
of a connection::
|
||||
of a connection:
|
||||
|
||||
import ssl
|
||||
from socket import socket, AF_INET, SOCK_DGRAM
|
||||
from dtls import do_patch
|
||||
do_patch()
|
||||
sock = ssl.wrap_socket(socket(AF_INET, SOCK_DGRAM))
|
||||
sock.connect(('foo.bar.com', 1234))
|
||||
sock.send('Hi there')
|
||||
```
|
||||
import ssl
|
||||
from socket import socket, AF_INET, SOCK_DGRAM
|
||||
from dtls import do_patch
|
||||
do_patch()
|
||||
sock = ssl.wrap_socket(socket(AF_INET, SOCK_DGRAM))
|
||||
sock.connect(('foo.bar.com', 1234))
|
||||
sock.send('Hi there')
|
||||
```
|
||||
|
||||
Design Goals
|
||||
============
|
||||
As of version 1.2.0, PyDTLS supports DTLS version 1.2 in addition to
|
||||
version 1.0. This version also introduces forward secrecy using
|
||||
elliptic curve cryptography and more fine-grained configuration options.
|
||||
|
||||
## Design Goals
|
||||
|
||||
The primary design goal of PyDTLS is broad availability. It has therefore
|
||||
been built to be widely compatible with the following:
|
||||
|
|
@ -52,8 +55,7 @@ been built to be widely compatible with the following:
|
|||
expects to go through server-side bind/listen/accept connection
|
||||
establishment should be reusable with PyDTLS sockets.
|
||||
|
||||
Distributions
|
||||
=============
|
||||
## Distributions
|
||||
|
||||
PyDTLS requires version 1.0.0 or higher of the OpenSSL
|
||||
library. Earlier versions are reported not to offer stable DTLS
|
||||
|
|
@ -67,14 +69,15 @@ no further installation steps.
|
|||
In comparison, installation of OpenSSL on Microsoft Windows operating
|
||||
systems is inconvenient. For this reason, source distributions of
|
||||
PyDTLS are available that include OpenSSL dll's for 32-bit and 64-bit
|
||||
Windows. For 32-bit Windows, a version built with the MinGW toolchain
|
||||
is also available. Its archive includes stripped as well as
|
||||
non-stripped dll's. The latter can be debugged with gdb on
|
||||
Windows. All dll's have been linked with the Visual Studio 2008
|
||||
version of the Microsoft C runtime library, msvcr90.dll, the version
|
||||
used by CPython 2.7. Installation of Microsoft redistributable runtime
|
||||
packages should therefore not be required on machines with CPython
|
||||
2.7. The version of OpenSSL distributed with PyDTLS 0.1.0 is 1.0.1c.
|
||||
The version distributed with PyDTLS 1.2.0 is commit
|
||||
248cf959672041f38f4d80a4a09ee01d8ab04fe8 (branch OpenSSL_1_0_2-stable,
|
||||
1.0.2l-dev, containing a desirable fix to DTLSv1_listen not present
|
||||
in 1.0.2k, the stable version at the time of PyDTLS 1.2.0 release).
|
||||
|
||||
The OpenSSL version used by PyDTLS can be determined from the values
|
||||
of *sslconnection's* DTLS_OPENSSL_VERSION_NUMBER,
|
||||
|
|
@ -83,8 +86,7 @@ are available through the *ssl* module also if *do_patch* has been
|
|||
called (see below). Note that the OpenSSL version used by PyDTLS may
|
||||
differ from the one used by the *ssl* module.
|
||||
|
||||
Interfaces
|
||||
==========
|
||||
## Interfaces
|
||||
|
||||
PyDTLS' top-level package, *dtls*, provides DTLS support through the
|
||||
**SSLConnection** class of its *sslconnection*
|
||||
|
|
@ -111,8 +113,7 @@ exceptions of type **ssl.SSLError** instead of its default
|
|||
remain identical when interfacing with *ssl* across stream and
|
||||
datagram sockets.
|
||||
|
||||
Connection Handling
|
||||
===================
|
||||
## Connection Handling
|
||||
|
||||
The DTLS protocol implies a connection as an association between two
|
||||
network peers where the overall association state is characterized by the
|
||||
|
|
@ -145,12 +146,11 @@ prohibited by *ssl*. *accept* returns peer address information, as
|
|||
expected. Note that when using the *ssl* interface to *dtls*, *listen*
|
||||
must be called before calling *accept*.
|
||||
|
||||
Demultiplexing
|
||||
==============
|
||||
## Demultiplexing
|
||||
|
||||
At the network io layer, only datagrams from its connected peer must be
|
||||
passed to a **SSLConnection** or **SSLSocket** object (unless the object
|
||||
is unconnected on the server-side, in which case in can be in listening
|
||||
is unconnected on the server-side, in which case it can be in listening
|
||||
mode, the initial server-side socket whose role it is to listen for
|
||||
incoming client connection requests).
|
||||
|
||||
|
|
@ -203,8 +203,7 @@ socket might now be readable as a result of the forwarded
|
|||
datagram. *accept* must return so that the application can iterate on
|
||||
its asynchronous *select* loop.
|
||||
|
||||
Shutdown and Unwrapping
|
||||
=======================
|
||||
## Shutdown and Unwrapping
|
||||
|
||||
PyDTLS implements the SSL/TLS shutdown protocol as it has been adapted
|
||||
for DTLS. **SSLConnection's** *shutdown* and **SSLSocket's** *unwrap*
|
||||
|
|
@ -227,8 +226,7 @@ passing it to *ssl.wrap_socket* or the **SSLConnection**
|
|||
constructor. If *osnet* is used, an actual *socket.socket* instance is
|
||||
returned.
|
||||
|
||||
Framework Compatibility
|
||||
=======================
|
||||
## Framework Compatibility
|
||||
|
||||
PyDTLS sockets have been tested under the following usage modes:
|
||||
|
||||
|
|
@ -240,8 +238,7 @@ PyDTLS sockets have been tested under the following usage modes:
|
|||
server framework SocketServer - ThreadingTCPServer (this works
|
||||
because of PyDTLS's emulation of connection-related calls)
|
||||
|
||||
Multi-thread Support
|
||||
====================
|
||||
## Multi-thread Support
|
||||
|
||||
Using multiple threads with OpenSSL requires implementing a locking
|
||||
callback. PyDTLS does implement this, and therefore multi-threaded
|
||||
|
|
@ -267,8 +264,16 @@ platforms where PyDTLS loads the same OpenSSL shared object as
|
|||
*ssl*. On Ubuntu 12.04, for example, this is the case, but on
|
||||
Microsoft Windows it is not.
|
||||
|
||||
Testing
|
||||
=======
|
||||
## Testing
|
||||
|
||||
A simple echo server is available to be executed from the project root
|
||||
directory with `python -m dtls.test.echo_seq`. The echo server is
|
||||
reachable using the code snippet at the top of this document, using port
|
||||
28000 at "localhost".
|
||||
|
||||
Unit test suites can be executed from the project root directory with
|
||||
`python -m dtls.test.unit [-v]` and `python -m dtls.test.unit_wrapper`
|
||||
(for the client and server wrappers)
|
||||
|
||||
Almost all of the Python standard library's *ssl* unit tests from the
|
||||
module *test_ssl.py* have been ported to *dtls.test.unit.py*. All tests
|
||||
|
|
@ -311,18 +316,19 @@ benefits of DTLS over SSL). Nevertheless, some useful insights can be
|
|||
gained by observing the operation of test_perf.py, including software
|
||||
stack behavior in the presence of some amount of packet loss.
|
||||
|
||||
Logging
|
||||
=======
|
||||
## Logging
|
||||
|
||||
The *dtls* package and its sub-packages log various occurrences,
|
||||
primarily events that can aid debugging. Especially *router* emits many
|
||||
messages when the logging level is set to at least *logging.DEBUG*.
|
||||
dtls/test/echo_seq.py activates this logging level during its operation.
|
||||
|
||||
Currently Supported Platforms
|
||||
=============================
|
||||
## Currently Supported Platforms
|
||||
|
||||
At the time of initial release, PyDTLS 0.1.0 has been tested on Ubuntu
|
||||
12.04.1 LTS 32-bit and 64-bit, as well as Microsoft Windows 7 32-bit
|
||||
and 64-bit, using CPython 2.7.3. Patches with additional platform
|
||||
ports are welcome.
|
||||
|
||||
As of release 1.2.0, PyDTLS is tested on Ubuntu 16.04 LTS as well as
|
||||
Microsoft Windows 10, using CPython 2.7.13.
|
||||
|
|
|
|||
Loading…
Reference in New Issue