Adding support for dynamic IV #77
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philpep
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Nov 28, 2025
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philpep
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philpep
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Hi, thanks for this.
Maybe instead of adding a new dynamic-decrypt add a --dynamic option to decrypt command and make it mutually exclusive with --iv? See https://docs.python.org/3/library/argparse.html#mutual-exclusion
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I have changed the usage as your request. Note that I had modified arg_from_env to allow this working: It is not possible to have a member of mutually exclusive group member with required = True... So I add an optional parameter... |
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Enedis add an other method for decrypt files. There is no IV, only a key. IV is dynamic and shipped inside the data bloc:
https://www.enedis.fr/sites/default/files/documents/pdf/Enedis-MOP-CF_080E.pdf
Example of encoded file with associated key:
ENEDIS.0525_fichier_chiffre.txt
key.txt