feat: create crypto.rs module for generation of tokens

Cargo.toml

@@ -13,6 +13,8 @@ actix-web = "4.10"
 argon2 = { version = "0.5.3", features = ["std"] }
 clap = { version = "4.5.37", features = ["derive"] }
 futures = "0.3"
+getrandom = "0.3.2"
+hex = "0.4.3"
 regex = "1.11"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"

src/crypto.rs

@@ -0,0 +1,14 @@
+use getrandom::fill;
+use hex::encode;
+
+fn generate_access_token() -> Result<String, getrandom::Error> {
+    let mut buf = [0u8; 16];
+    fill(&mut buf)?;
+    Ok(encode(&buf))
+}
+
+fn generate_refresh_token() -> Result<String, getrandom::Error> {
+    let mut buf = [0u8; 32];
+    fill(&mut buf)?;
+    Ok(encode(&buf))
+}

src/main.rs

@@ -6,6 +6,7 @@ use std::time::SystemTime;
 mod config;
 use config::{Config, ConfigBuilder};
 mod api;
+mod crypto;
 
 type Error = Box<dyn std::error::Error>;