dnsdist: Ponder adding Lua bindings for symmetric encryption

[rgacogne]

• Program: dnsdist
• Issue type: Feature request

Short description

DNSdist already has the code needed to do secret key cryptography, relying on libsodium when available and libcrypto otherwise. It would be nice to expose this to the Lua interface, including the FFI one.

Description

Something like this:

AuthenticatedCryptoGenerateKey() -> KeyObject or nil, error
AuthenticatedCryptoImportKey(string) -> KeyObject or nil, error
KeyObject:encrypt(string) -> string or nil, error
KeyObject:decrypt(string -> string or nil, error
KeyObject:export() -> string or nil, error