Azure-sdk-for-python: Incorrect padding with python 2.7.6

[Fajkowsky]

I was executing this code:

    blob_service = BlobService(
        account_name=azure_account,
        account_key=azure_key
    )
    blob_service.put_block_blob_from_path(
        'images',
        'filename',
        'dwa.jpg',
        x_ms_blob_content_type='image/jpeg'
    )

File "cdn.py", line 22, in main
    x_ms_blob_content_type='image/jpeg'
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/storage/blobservice.py", line 962, in put_block_blob_from_path
    retry_wait)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/storage/blobservice.py", line 1059, in put_block_blob_from_file
    x_ms_lease_id)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/storage/blobservice.py", line 869, in put_blob
    request, self.authentication)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/storage/__init__.py", line 546, in _update_storage_blob_header
    authentication.sign_request(request)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/storage/__init__.py", line 1242, in sign_request
    self._add_authorization_header(request, string_to_sign)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/storage/__init__.py", line 1221, in _add_authorization_header
    signature = _sign_string(self.account_key, string_to_sign)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/__init__.py", line 610, in _sign_string
    key = _decode_base64_to_bytes(key)
  File "/home/dawid/Pulpit/Projekty/venvs/ET/local/lib/python2.7/site-packages/azure/__init__.py", line 189, in _decode_base64_to_bytes
    return base64.b64decode(data)
  File "/usr/lib/python2.7/base64.py", line 76, in b64decode
    raise TypeError(msg)
TypeError: Incorrect padding

[huguesv]

Sounds like there is something wrong with the account key. Does it end with one or more '=' characters? Make sure that you include all of them.

[Fajkowsky]

Thanks for response! In fact, yest it ways because invalid key.

[gregdegruy]

Should the account key end with more then one '='. I heard from a team member that the key must first be hmac encoded https://docs.python.org/2/library/hmac.html?

[lmazuel]

Hi @gregdegruy
Please note that the storage teams now owns this client directly:
https://github.com/Azure/azure-storage-python

You might to ask them directly, since I don't know what are the current constraints
Thanks,