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Feature #13914
closed
smbd encrypt_cipher property should list enabled ciphers explicitly
Start date:
2021-06-29
Due date:
% Done:
100%
Estimated time:
Difficulty:
Medium
Tags:
smb, smf
Gerrit CR:
Description
Currently, we support 2 encryption ciphers: AES-128-CCM and AES-128-GCM. There are 2 corresponding options for smbd/encrypt_cipher property: aes128-ccm and aes128-gcm. If aes128-ccm option is chosen, AES128-CCM is the only allowed cipher. When aes128-gcm is set, both ciphers are enabled. There is no way to disable aes128-ccm.
Latest SMB specification adds other 2 ciphers: AES-256-CCM and AES-256-GCM, and it becomes more clear that we have to change the approach for encryp_cipher property. Probably, we should list enabled ciphers explicitly.
The new approach would set up the property such way: smbd/encrypt_cipher="<cipher_1>[,<cipher_k>,<cipher_n>]". If it is not set (empty) then all ciphers would be enabled.
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