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Ensure b64 prefs always have min padding

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This relates to an issue with an unknown cause (unable to reproduce on
my end) where the preferences string does not contain the correct amount
of padding on a base64 encoded value. This is mediated by appending
padding to the end of the encoded value, since any extra padding is
removed anyways.

Fixes #987
This commit is contained in:
Ben Busby 2023-05-19 11:37:50 -06:00
parent 2cb4b9e3ca
commit f213a2a64a
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GPG Key ID: B9B7231E01D924A1
1 changed files with 4 additions and 2 deletions
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6
app/models/config.py
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@ -254,7 +254,8 @@ class Config:
key = self._get_fernet_key(self.preferences_key)
config = Fernet(key).decrypt(
brotli.decompress(urlsafe_b64decode(preferences.encode()))
brotli.decompress(urlsafe_b64decode(
preferences.encode() + b'=='))
)
config = pickle.loads(brotli.decompress(config))
@ -262,7 +263,8 @@ class Config:
config = {}
elif mode == 'u': # preferences are not encrypted
config = pickle.loads(
brotli.decompress(urlsafe_b64decode(preferences.encode()))
brotli.decompress(urlsafe_b64decode(
preferences.encode() + b'=='))
)
else: # preferences are incorrectly formatted
config = {}