Thank you Aki, I will try to digg into that direction
On 05/26/2017 04:44 PM, Aki Tuomi wrote:
On May 26, 2017 at 5:13 PM "dovecot@avv.solutions" <dovecot@avv.solutions> wrote:
Hello Community,
(sorry to be more busy, hence more running questions in parallel :) )
As mentioned in another post, I am testing mail_crypt plugin.
I was wondering how to really secure the process sothat even the admin cannot have any access to the other users mail content.
My current config is simple:
using per-folder keys (hence the per-user spaces are preserved)
put the public/private global keys in base64 format into the sql DB (elliptic algo)
This obviously allows anyone with read access to the table to decrypt the mails from the filesystem... which I try to prevent.
Considering of course that all mail users are virtual and do not (and may not) have access to the box itself:
how can I secure the keys? I do not see how to handle a assword for them?
a solution might be to crypt/decrypt the keys using the user's password?
other?
Thank you for you help. (sorry for possible duplicate)
You can use userdb attribute mail_crypt_private_password to encrypt the private key. You can use something like
userdb_mail_crypt_private_password = %{pkcs5;salt=<random string>%Lu:password}
to generate the encryption password on the fly from passdb.
Aki Tuomi Dovecot Oy