48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2015 Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
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#
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# This file is part of python-omemo library.
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#
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# The python-omemo library is free software: you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# python-omemo is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# the python-omemo library. If not, see <http://www.gnu.org/licenses/>.
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#
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import sys
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import logging
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log = logging.getLogger('gajim.plugin_system.omemo')
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try:
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from .aes_gcm_native import aes_decrypt
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from .aes_gcm_native import aes_encrypt
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log.debug('Using fast cryptography')
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except ImportError:
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from .aes_gcm_fallback import aes_decrypt
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from .aes_gcm_fallback import aes_encrypt
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log.debug('Using slow cryptography')
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def encrypt(key, iv, plaintext):
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return aes_encrypt(key, iv, plaintext)
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def decrypt(key, iv, ciphertext):
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plaintext = aes_decrypt(key, iv, ciphertext).decode('utf-8')
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if sys.version_info < (3, 0):
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return unicode(plaintext)
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else:
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return plaintext
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class NoValidSessions(Exception):
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pass
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