[enh] Using -iter or -pbkdf2 would be better.

[dag7dev]

Please, implement iter and pbkdf2.

OS: Ubuntu 22.04 LTS
OpenSSL: OpenSSL 3.0.2 15 Mar 2022 (Library: OpenSSL 3.0.2 15 Mar 2022)

More info:
https://askubuntu.com/questions/1093591/how-should-i-change-encryption-according-to-warning-deprecated-key-derivat

[Lorenzoantonelli]

I included -pbkdf2 for encryption and decryption with 1250666

For the iteration number: if I store it in the json with the rest of the data it would be useless, I need to find a way to store it safely or ask for it in input every time.