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# Copyright 2017 Canonical Ltd.
# Licensed under the LGPLv3, see LICENCE file for details.
import base64
import json
import webbrowser
from pymacaroons import Macaroon
from macaroonbakery import json_serializer
def deserialize(json_macaroon):
'''Deserialize a JSON macaroon into a macaroon object from pymacaroons.
@param the JSON macaroon to deserialize as a dict.
@return the deserialized macaroon object.
'''
return Macaroon.deserialize(json.dumps(json_macaroon),
json_serializer.JsonSerializer())
def serialize_macaroon_string(macaroon):
'''Serialize macaroon object to string.
@param macaroon object to be serialized.
@return a string serialization form of the macaroon.
'''
return macaroon.serialize(json_serializer.JsonSerializer())
def add_base64_padding(b):
'''Add padding to base64 encoded bytes.
pymacaroons does not give padded base64 bytes from serialization.
@param bytes b to be padded.
@return a padded bytes.
'''
return b + b'=' * (-len(b) % 4)
def remove_base64_padding(b):
'''Remove padding from base64 encoded bytes.
pymacaroons does not give padded base64 bytes from serialization.
@param bytes b to be padded.
@return a padded bytes.
'''
return b.rstrip(b'=')
def raw_urlsafe_b64decode(s):
'''Base64 decode with added padding and convertion to bytes.
@param s string decode
@return bytes decoded
'''
return base64.urlsafe_b64decode(add_base64_padding(
s.encode('ascii')))
def raw_urlsafe_b64encode(b):
'''Base64 encode with padding removed.
@param s string decode
@return bytes decoded
'''
return remove_base64_padding(base64.urlsafe_b64encode(b))
def visit_page_with_browser(visit_url):
'''Open a browser so the user can validate its identity.
@param visit_url: where to prove your identity.
'''
webbrowser.open(visit_url, new=1)
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