System Initiative

import { Base64 } from "js-base64"; import _sodium from "libsodium-wrappers"; export interface PublicKey { /** * The PK of the public key */ pk: string; /** * The name of the public key */ name: string; /** * The public key contents, encoded as a Base64 string * * # Examples * * Decoding a public key into a `Uint8Array` type: * * ```ts * Base64.toUint8Array(key.public_key); * ``` */ public_key: string; /** * A created lamport clock, used to sort multiple generations of key pairs */ created_lamport_clock: string; created_at: string; updated_at: string; } export async function encryptMessage( message: Record<string, string>, publicKey: PublicKey, ): Promise<number[]> { await _sodium.ready; const sodium = _sodium; // Base64 decode the key into a Uint8Array (i.e. "bytes") const pkey = Base64.toUint8Array(publicKey.public_key); return Array.from(sodium.crypto_box_seal(serializeMessage(message), pkey)); } function serializeMessage(message: Record<string, string>): Uint8Array { const json = JSON.stringify(message, null, 0); const result = new Uint8Array(json.length); for (let i = 0; i < json.length; i++) { result[i] = json.charCodeAt(i); } return result; }