Prep for 0.5 release

- Update CHANGELOG and CONTRIBUTORS
- Bump version
- Include Apple Gamecenter highscore setting tutorial in docs
This commit is contained in:
Aldo Cortesi 2011-06-27 16:38:00 +12:00
parent 0a642f2441
commit 46ec8f52e7
10 changed files with 137 additions and 7 deletions

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27 June 2011: mitmproxy 0.5:
* An -n option to start the tools without binding to a proxy port.
* Allow scripts, hooks, sticky cookies etc. to run on flows loaded from
save files.
* Regularize command-line options for mitmproxy and mitmdump.
* Add an "SSL exception" to mitmproxy's license to remove possible
distribution issues.
* Add a --cert-wait-time option to make mitmproxy pause after a new SSL
certificate is generated. This can pave over small discrepancies in
system time between the client and server.
* Handle viewing big request and response bodies more elegantly. Only
render the first 100k of large documents, and try to avoid running the
XML indenter on non-XML data.
* BUGFIX: Make the "revert" keyboard shortcut in mitmproxy work after a
flow has been replayed.
* BUGFIX: Repair a problem that sometimes caused SSL connections to consume
100% of CPU.
30 March 2011: mitmproxy 0.4

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179 Aldo Cortesi
203 Aldo Cortesi
18 Henrik Nordstrom
13 Thomas Roth
1 Yuangxuan Wang
1 Henrik Nordström

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<li>Tutorials</li>
<ul>
<li> <a href="@!urlTo("tutorials/30second.html")!@">Client replay: a 30 second example</a> </li>
<li> Scripting: On-the-fly modifications to HTTP conversations [coming soon] </li>
<li> Sticky cookies [coming soon] </li>
<li> Breaking iPhone apps for fun and profit [coming soon] </li>
<li> <a href="@!urlTo("tutorials/gamecenter.html")!@">Setting highscores on Apple's GameCenter</a> </li>
</ul>
<li><a href="@!urlTo("faq.html")!@">FAQ</a></li>
<li><a href="@!urlTo("admin.html")!@">Administrivia</a></li>

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import os, sys
import countershape
from countershape import Page, Directory, PythonModule, markup
import countershape.grok, countershape.template
import countershape.template
sys.path.insert(0, "..")
from libmproxy import filt
@ -33,7 +33,7 @@ ns.index_contents = file(mpath("README.mkd")).read()
top = os.path.abspath(os.getcwd())
def example(s):
d = file(mpath(s)).read()
return countershape.template.pySyntax(d)
return countershape.template.Syntax("py")(d)
ns.example = example

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## The setup
In this tutorial, I'm going to show you how simple it is to creatively
interfere with Apple Game Center traffic using mitmproxy. To set things up, I
registered my mitmproxy CA certificate with my iPhone - there's a [step by step
set of instructions](@!urlTo("certinstall/ios.html")!@) elsewhere in this manual. I then
started mitmproxy on my desktop, and configured the iPhone to use it as a
proxy.
## Taking a look at the Game Center traffic
Lets take a first look at the Game Center traffic. The game I'll use in this
tutorial is [Super Mega
Worm](http://itunes.apple.com/us/app/super-mega-worm/id388541990?mt=8) - a
great little retro-apocalyptic sidescroller for the iPhone:
<center>
<img src="@!urlTo("tutorials/supermega.png")!@"/>
</center>
After finishing a game (take your time), watch the traffic flowing through
mitmproxy:
<center>
<img src="@!urlTo("tutorials/one.png")!@"/>
</center>
We see a bunch of things we might expect - initialisation, the retrieval of
leaderboards and so forth. Then, right at the end, there's a POST to this
tantalising URL:
<pre>
https://service.gc.apple.com/WebObjects/GKGameStatsService.woa/wa/submitScore
</pre>
The contents of the submission are particularly interesting:
<!--(block|syntax("xml"))-->
<plist version="1.0">
<dict>
<key>category</key>
<string>SMW_Adv_USA1</string>
<key>score-value</key>
<integer>55</integer>
<key>timestamp</key>
<integer>1301553284461</integer>
</dict>
</plist>
<!--(end)-->
This is a [property list](http://en.wikipedia.org/wiki/Property_list),
containing an identifier for the game, a score (55, in this case), and a
timestamp. Looks pretty simple to mess with.
## Modifying and replaying the score submission
Lets edit the score submission. First, select it in mitmproxy, then press
__enter__ to view it. Make sure you're viewing the request, not the response -
you can use __tab__ to flick between the two. Now press __e__ for edit. You'll
be prompted for the part of the request you want to change - press __b__ for
body. Your preferred editor (taken from the EDITOR environment variable) will
now fire up. Lets bump the score up to something a bit more ambitious:
<!--(block|syntax("xml"))-->
<plist version="1.0">
<dict>
<key>category</key>
<string>SMW_Adv_USA1</string>
<key>score-value</key>
<integer>2200272667</integer>
<key>timestamp</key>
<integer>1301553284461</integer>
</dict>
</plist>
<!--(end)-->
Save the file and exit your editor.
The final step is to replay this modified request. Simply press __r__ for
replay.
## The glorious result and some intrigue
<center>
<img src="@!urlTo("tutorials/leaderboard.png")!@"/>
</center>
And that's it - according to the records, I am the greatest Super Mega Worm
player of all time.
Curiously, the top competitors' scores are all the same: 2,147,483,647. If you
think that number seems familiar, you're right: it's 2^31-1, the maximum value
you can fit into a signed 32-bit int. Now let me tell you another peculiar
thing about Super Mega Worm - at the end of every game, it submits your highest
previous score to the Game Center, not your current score. This means that it
stores your highscore somewhere, and I'm guessing that it reads that stored
score back into a signed integer. So, if you _were_ to cheat by the relatively
pedestrian means of modifying the saved score on your jailbroken phone, then
2^31-1 might well be the maximum score you could get. Then again, if the game
itself stores its score in a signed 32-bit int, you could get the same score
through perfect play, effectively beating the game. So, which is it in this
case? I'll leave that for you to decide.

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@ -2,4 +2,5 @@ from countershape import Page
pages = [
Page("30second.html", "Client playback: a 30 second example"),
Page("gamecenter.html", "Setting highscores on Apple's GameCenter"),
]

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IVERSION = (0, 4)
IVERSION = (0, 5)
VERSION = ".".join([str(i) for i in IVERSION])