[Bug 1363348] Re: Multipart base64 file decoding of fails with large files - greater than 47406

[Andres Rodriguez]

** Changed in: maas
       Status: Triaged => Fix Released

** Also affects: python-django (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: python-django (Ubuntu)
   Importance: Undecided => Critical

** Changed in: python-django (Ubuntu Trusty)
   Importance: Undecided => Critical

** Changed in: python-django (Ubuntu Trusty)
       Status: New => Confirmed

** Summary changed:

- Multipart base64 file decoding of fails with large files  - greater than 47406
+ [SRU] Multipart base64 file decoding of fails with large files  - greater than 47406

** Description changed:

+ [Impact]
  This is with 1.7.0~beta2+bzr2847-0ubuntu1
  
  Attempting to upload boot-resources files larger than 47406 bytes
  results in this error:
  
  "Could not decode base64 data: TypeError(Error('Incorrect padding',),)"
  
  Larger stack trace:
  http://paste.ubuntu.com/8184315/
  
+ [Test Case]
+ 1. Install MAAS
+ 2. Create a file that's larger than 47406 bytes.
+ (dd if=/dev/urandom of=blah bs=47407 count=1)
+ 
+ 3. Try to upload to MAAS (With the Fix it will succeed, without the fix, it will fail).
+ (maas local boot-resources create name=testing/testing architecture=amd64/generic content@=/home/ubuntu/blah
+ Could not decode base64 data: TypeError(Error('Incorrect padding',),))
+ 
+ [Regression Potential]
+ Minimal. This has been fixed upstream and has been tested by the MAAS developers.
+ 
+ [Old Information]
  You can reproduce this with dd:
  ubuntu at trusty-maas6:~$ maas local boot-resources create name=testing/testing architecture=amd64/generic content@=/home/ubuntu/blah
  {
      "name": "testing/testing",
      "title": "",
      "architecture": "amd64/generic",
      "sets": {
          "20140830": {
              "files": {
                  "tgz": {
                      "filename": "tgz",
                      "filetype": "tgz",
                      "sha256": "a76c2f1ca615406f257e0eb8148b1aecc404266497ec5ce472141f560abcc59f",
                      "complete": true,
                      "size": 47406
                  }
              },
              "label": "generated",
              "version": "20140830",
              "complete": true,
              "size": 47406
          }
      },
      "type": "Generated",
      "id": 130,
      "resource_uri": "/MAAS/api/1.0/boot-resources/130/"
  }
  ubuntu at trusty-maas6:~$ dd if=/dev/urandom of=blah bs=47407 count=1
  1+0 records in
  1+0 records out
  47407 bytes (47 kB) copied, 0.0140973 s, 3.4 MB/s
  ubuntu at trusty-maas6:~$ maas local boot-resources create name=testing/testing architecture=amd64/generic content@=/home/ubuntu/blah
  Could not decode base64 data: TypeError(Error('Incorrect padding',),)

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https://bugs.launchpad.net/bugs/1363348

Title:
  [SRU] Multipart base64 file decoding of fails with large files  -
  greater than 47406

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