[Metalab] Ask Metalab: Please help decoding this web-request! (eg. ~base64) "?request=CsQCCuABRFFBQUFKd0FBQURCdU..."

[Chris Hager]

Hey Guys!

I was checking out what data my G1 is sending to Google via HTTP POST 
requests, which is somehow encoded. First, here is the request-string 
which would be nice to see decoded:

?request=CsQCCuABRFFBQUFKd0FBQURCdU5DbG04UEF5NUhyMzkzT1pTSThEcmdsWExNVGdWTTVobjBnbEdhVFk0WGo3bExHTl92MURnVUR5U2lVV281UElUT21KVTdDZEVoWHpwSHI5czQwT01HTkRkSHhvUG1nY2szREJNQ2NkNTNyV0ppTlcweHBhcjUtREljbXVFaWtQaUJURC1SNEJBMTQzSk90bDduVVNrbWNIZjJheG55UVFZTFBuY1RERUZzUnNoN0xfalNJcVpDQXlSajI3Q3g0QkJoLVR5WFNsaWVUR0VwU1hOZTAQABjqByIQMjAwMTQ1ZGE5MGM4NmU1ZioHZHJlYW06MzICZW46AkdCQhBULU1vYmlsZSBBdXN0cmlhSgBSBTIzMjAzWgUyMzIwM2IVYW0tYW5kcm9pZC10bW9iaWxlLWF0EyIKCAQ4AUAASApQABQ

I found out that i can partly decode the key (starting at 'CsQCC...') 
with base64 and see parts of the original string, but still don't get a 
totally decoded result. (To decode with base64, you have to append "=" 
at the end of the key).

  > import base64
  > base64.decode64(REQUEST_KEY + "=")

Output (with repr):
'\n\xc4\x02\n\xe0\x01DQAAAJwAAADBuNClm8PAy5Hr393OZSI8DrglXLMTgVM5hn0glGaTY4Xj7lLGN_v1DgUDySiUWo5PITOmJU7CdEhXzpHr9s40OMGNDdHxoPmgck3DBMCcd53rWJiNW0xpar5-DIcmuEikPiBTD-R4BA143JOtl7nUSkmcHf2axnyQQYLPncTDEFsRsh7L_jSIqZCAyRj27Cx4BBh-TyXSlieTGEpSXNe0\x10\x00\x18\xea\x07"\x10200145da90c86e5f*\x07dream:32\x02en:\x02GBB\x10T-Mobile 
AustriaJ\x00R\x0523203Z\x0523203b\x15am-android-tmobile-at\x13"\n\x08\x048\x01@\x00H\nP\x00\x14'

So these are a lot of hex characters which are not inside the ascii 
character map. I don't know if this is the right trail, but here is 
where I don't know how to proceed on myself. It would be very 
interesting to see how the G1's communicate with Google!

Please have a look at it -- perhaps we can solve this puzzle with joined 
forces!

- Chris

Jabber: metachris at jabber.metalab.at