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Thomas Lackner 2012-12-31 05:53:16 -06:00
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README.md
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@ -17,8 +17,8 @@ Limitations
Only login (with list of new media) and fetching of images is implemented. Only login (with list of new media) and fetching of images is implemented.
This is obviously a huge failing which I am to correct when I have more time. This is obviously a huge failing which I am to correct when I have more time.
Motivation Motivation and development process
---------- ----------------------------------
I'm a huge fan of Snapchat. I'm stunned and delighted by the fact that a simple I'm a huge fan of Snapchat. I'm stunned and delighted by the fact that a simple
feature like auto-expiration of images can create such a compelling and feature like auto-expiration of images can create such a compelling and
@ -35,6 +35,9 @@ decompiling the whole thing with a mix of tools (all of them seemed to produce
subtly incorrect output), and then puzzling through the process of creating subtly incorrect output), and then puzzling through the process of creating
their dreaded access tokens (called req\_token in the HTTP calls). their dreaded access tokens (called req\_token in the HTTP calls).
This involved me paging through Fiddler, trying to generate SHA-256 hashes
seemingly at random, tearing my hear out, and weeping openly.
Their system is a bit unusual: it AES-256 hashes the two input values Their system is a bit unusual: it AES-256 hashes the two input values
separately, using a secret key contained in the binary, and then uses a fixed separately, using a secret key contained in the binary, and then uses a fixed
pattern string to pull bytes from one or the other. The final composition of pattern string to pull bytes from one or the other. The final composition of
@ -77,6 +80,7 @@ The TODO list is almost endless at this point:
- Port to Javascript (probably via Node + NPM since their API doesn't seem to - Port to Javascript (probably via Node + NPM since their API doesn't seem to
support JSONP) support JSONP)
- Add support for PHP composer - Add support for PHP composer
- Test framework
Author Author
------ ------
@ -84,3 +88,4 @@ Author
Made by [@tlack](http://twitter.com/tlack) with a lot of help from Made by [@tlack](http://twitter.com/tlack) with a lot of help from
[@adamcaudill](http://twitter.com/adamcaudill) [@adamcaudill](http://twitter.com/adamcaudill)