For now? I'm experimenting on an old concept.
docs: Add commentary to async crypto ffi module
This is actually part of a bigger change I'll introduce later, adding
functions to convert an ed25519 to a x25519, allowing for private data
transfer between individual users, hopefully.
Signed-off-by: MLC Bloeiman <mar@strawmelonjuice.com>
MLC Bloeiman
(Jul 14, 2026, 10:51 AM +0200)
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lumina/backend/src/lumina_server/lumina_async_crypto_ffi.erl
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lumina/backend/src/lumina_server/lumina_async_crypto_ffi.erl
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%% **Lumina > Backend > Erlang Native Implementations >**
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%% # Asynchronous cryptography
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%%
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-module(lumina_async_crypto_ffi).
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-export([generate_keypair/0, sign/2, verify/3]).
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-export([generate_keypair/0, sign/2, verify/3, ed25519_to_x25519_public/1, compute_x25519_shared_secret/2]).
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%% Generates an ed25519 keypair, used for the identification and signing of a Lumina user!
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generate_keypair() ->
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crypto:generate_key(eddsa, ed25519).
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%% Sign a message using ed25519.
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sign(Message, PrivateKey) ->
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crypto:sign(eddsa, none, Message, [PrivateKey, ed25519]).
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%% Verify a signature on a ed25519 signed message.
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verify(Message, Signature, PublicKey) ->
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crypto:verify(eddsa, none, Message, Signature, [PublicKey, ed25519]).