36 lines
1.2 KiB
Python
36 lines
1.2 KiB
Python
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# cryptomator-utils: Python utilities for inspecting Cryptomator drives
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# Copyright (C) 2024 Lee Yingtong Li (RunasSudo)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import base64
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def b64url_decode(s):
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"""
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Decode the Base64URL (optional padding) encoded string
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"""
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padding_len = -(len(s) % -4)
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return base64.urlsafe_b64decode(s + '=' * padding_len)
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def b64url_encode(s, strip_padding=True):
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"""
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Encode the bytes with Base64URL, optionally stripping padding
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"""
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result = base64.urlsafe_b64encode(s)
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if strip_padding:
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result = result.rstrip(b'=')
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return result.decode('utf-8')
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