Add IcalinguaSinger struct and client module

ica-rs/src/client.rs

@@ -0,0 +1,26 @@
+use ed25519_dalek::{Signature, Signer, SigningKey};
+use rust_socketio::{ClientBuilder, Event, Payload, RawClient};
+
+pub struct IcalinguaSinger {
+    pub host: String,
+    pub pub_key: SigningKey,
+}
+
+impl IcalinguaSinger {
+    pub fn new(host: String, pub_key: &str) -> Self {
+        let array_key: [u8; 32] = hex::decode(pub_key).unwrap().try_into().unwrap();
+
+        let signing_key: SigningKey = SigningKey::from_bytes(&array_key);
+        Self {
+            host,
+            pub_key: signing_key,
+        }
+    }
+
+    pub fn sign_for_salt(&self, salt: String) -> Vec<u8> {
+        let salt: Vec<u8> = hex::decode(salt).unwrap();
+        let signature: Signature = self.pub_key.sign(salt.as_slice());
+
+        signature.to_bytes().to_vec()
+    }
+}

ica-rs/src/main.rs

@@ -1,3 +1,5 @@
+mod client;
+
 use ed25519_dalek::{Signature, Signer, SigningKey};
 use rust_socketio::{ClientBuilder, Payload, RawClient, Event};
 use std::time::Duration;