I’m communicating between Python and Elixir. Python reads my (Linux-standard, ssh-keygen with no options) ~/.ssh/id_rsa.pub, pem-encodes it, and sends it to Elixir via encrypted websocket. This is a (fake) version of it pry(7)> key "-----BEGIN PUBLIC KEY-----\nMIIBojANBgkqhkiG9w0BEH6ycVAgMBAAE=\n--…

This works for strings up to about the size of the key, then doesn’t. You need a box. The most ubiquitous box JWE (encryption) which is supported by jose . JWK does your PEM decoding and key management. It’s not easy to figure all out, but nothing with crypto is.

I completely get what you mean @vegabook . I too struggled longer than I’d like to admit before I got my assymetric RSA encryption working. Please see below for a module I wrote, that hopefully explains things well enough. defmodule Ls.Crypto.Assymetric do @moduledoc """ Functionality releated t…

It’s a thing of beauty! [image]

Yeah as much as I had “fun” working on the self-rolled solution, there are just too many permutations on multiple dimensions (data structures, string encodings, cryptography algorithms, key formats, etc) that it’s becoming a cartesian explosion of trial and error. I got the python to elixir side wor…

I had the exact “fun” you’re talking about. Crypto is really interesting, deep and complex. Learning more about how any part of it works is well worth the effort (or rabbit hole). Good luck!

That sounds like a great idea @vegabook ! Using something standardized / well thought out that someone else spent a lot of time thinking about is almost always the way to go. It’s way too easy to miss out on some subtleties otherwise, especially when it comes to security and cryptography. Like @danj …

Yes I’ll probably lean into the Phoenix stack’s authentication methods. Yep once I’m authed wss will sort everything out in terms of privacy. Unfortunately Bloomberg does not have API access from Linux or Mac unless purchasing one of their multi-tens-of-thousands dollars per month “Bpipe” services,…

Ah you’re interactiving with Bloomberg over the internet - gotcha! Cool that you used ZeroMQ before. I only suggested it because most people I know never heard of it, and much less used it :slight_smile: . But you’re 100% right - it won’t be a good solution in this case. Seems like you have a pret…

How to encrypt a string using a pem-encoded public key (obtained from Python)

Questions & Help Questions

vegabook October 5, 2023, 8:47pm 3

It’s a thing of beauty!