initial commit

Signed-off-by: Kamal Tufekcic <kamal@lo.sh>

soliton_wasm/src/call.rs

@@ -0,0 +1,54 @@
+//! Call key derivation.
+
+use crate::errors::to_js_err;
+use wasm_bindgen::prelude::*;
+
+/// Call keys for encrypted voice/video media.
+///
+/// Call `free()` when done to zeroize key material.
+#[wasm_bindgen]
+pub struct CallKeys {
+    inner: Option<soliton::call::CallKeys>,
+}
+
+#[wasm_bindgen]
+impl CallKeys {
+    /// Current send key (32 bytes).
+    #[wasm_bindgen(js_name = "sendKey")]
+    pub fn send_key(&self) -> Result<Vec<u8>, JsValue> {
+        let inner = self
+            .inner
+            .as_ref()
+            .ok_or_else(|| crate::errors::js_error("call keys consumed"))?;
+        Ok(inner.send_key().to_vec())
+    }
+
+    /// Current recv key (32 bytes).
+    #[wasm_bindgen(js_name = "recvKey")]
+    pub fn recv_key(&self) -> Result<Vec<u8>, JsValue> {
+        let inner = self
+            .inner
+            .as_ref()
+            .ok_or_else(|| crate::errors::js_error("call keys consumed"))?;
+        Ok(inner.recv_key().to_vec())
+    }
+
+    /// Advance the call chain — derives fresh keys, zeroizes old ones.
+    pub fn advance(&mut self) -> Result<(), JsValue> {
+        let inner = self
+            .inner
+            .as_mut()
+            .ok_or_else(|| crate::errors::js_error("call keys consumed"))?;
+        inner.advance().map_err(to_js_err)
+    }
+
+    pub fn free(&mut self) {
+        self.inner = None;
+    }
+}
+
+impl CallKeys {
+    pub fn from_inner(inner: soliton::call::CallKeys) -> Self {
+        Self { inner: Some(inner) }
+    }
+}