fix(useragent): now using new challenge format

useragent/rust/src/api/mod.rs

@@ -1,13 +1,15 @@
 use anyhow::anyhow;
+use arbiter_crypto::authn::{self, AuthChallenge, USERAGENT_CONTEXT};
 use flutter_rust_bridge::frb;
-use arbiter_crypto::authn::{self, USERAGENT_CONTEXT};
 
 #[frb(opaque)]
 pub struct MldsaKey(authn::SigningKey);
 
 impl MldsaKey {
     pub fn from_bytes(bytes: &[u8]) -> anyhow::Result<Self> {
-        let bytes: [u8; 32] = bytes.try_into().map_err(|_| anyhow!("Invalid key length"))?;
+        let bytes: [u8; 32] = bytes
+            .try_into()
+            .map_err(|_| anyhow!("Invalid key length"))?;
         Ok(Self(authn::SigningKey::from_seed(bytes)))
     }
 
@@ -26,4 +28,11 @@ impl MldsaKey {
     pub fn get_public_key(&self) -> Vec<u8> {
         self.0.public_key().to_bytes().to_vec()
     }
-}
+}
+
+pub fn format_challenge(random: Vec<u8>, timestamp: i64) -> Result<Vec<u8>, String> {
+    let challenge = AuthChallenge::from_parts(&random, timestamp)
+        .map_err(|_| "Invalid nonce length".to_string())?;
+
+    Ok(challenge.format())
+}

useragent/rust/src/frb_generated.rs

@@ -39,7 +39,7 @@ flutter_rust_bridge::frb_generated_boilerplate!(
     default_rust_auto_opaque = RustAutoOpaqueMoi,
 );
 pub(crate) const FLUTTER_RUST_BRIDGE_CODEGEN_VERSION: &str = "2.12.0";
-pub(crate) const FLUTTER_RUST_BRIDGE_CODEGEN_CONTENT_HASH: i32 = -437661335;
+pub(crate) const FLUTTER_RUST_BRIDGE_CODEGEN_CONTENT_HASH: i32 = 1247923898;
 
 // Section: executor
 
@@ -267,6 +267,40 @@ fn wire__crate__api__MldsaKey_to_bytes_impl(
         },
     )
 }
+fn wire__crate__api__format_challenge_impl(
+    port_: flutter_rust_bridge::for_generated::MessagePort,
+    ptr_: flutter_rust_bridge::for_generated::PlatformGeneralizedUint8ListPtr,
+    rust_vec_len_: i32,
+    data_len_: i32,
+) {
+    FLUTTER_RUST_BRIDGE_HANDLER.wrap_normal::<flutter_rust_bridge::for_generated::SseCodec, _, _>(
+        flutter_rust_bridge::for_generated::TaskInfo {
+            debug_name: "format_challenge",
+            port: Some(port_),
+            mode: flutter_rust_bridge::for_generated::FfiCallMode::Normal,
+        },
+        move || {
+            let message = unsafe {
+                flutter_rust_bridge::for_generated::Dart2RustMessageSse::from_wire(
+                    ptr_,
+                    rust_vec_len_,
+                    data_len_,
+                )
+            };
+            let mut deserializer =
+                flutter_rust_bridge::for_generated::SseDeserializer::new(message);
+            let api_random = <Vec<u8>>::sse_decode(&mut deserializer);
+            let api_timestamp = <i64>::sse_decode(&mut deserializer);
+            deserializer.end();
+            move |context| {
+                transform_result_sse::<_, String>((move || {
+                    let output_ok = crate::api::format_challenge(api_random, api_timestamp)?;
+                    Ok(output_ok)
+                })())
+            }
+        },
+    )
+}
 
 // Section: related_funcs
 
@@ -312,6 +346,13 @@ impl SseDecode for String {
     }
 }
 
+impl SseDecode for i64 {
+    // Codec=Sse (Serialization based), see doc to use other codecs
+    fn sse_decode(deserializer: &mut flutter_rust_bridge::for_generated::SseDeserializer) -> Self {
+        deserializer.cursor.read_i64::<NativeEndian>().unwrap()
+    }
+}
+
 impl SseDecode for Vec<u8> {
     // Codec=Sse (Serialization based), see doc to use other codecs
     fn sse_decode(deserializer: &mut flutter_rust_bridge::for_generated::SseDeserializer) -> Self {
@@ -371,6 +412,7 @@ fn pde_ffi_dispatcher_primary_impl(
         3 => wire__crate__api__MldsaKey_get_public_key_impl(port, ptr, rust_vec_len, data_len),
         4 => wire__crate__api__MldsaKey_sign_impl(port, ptr, rust_vec_len, data_len),
         5 => wire__crate__api__MldsaKey_to_bytes_impl(port, ptr, rust_vec_len, data_len),
+        6 => wire__crate__api__format_challenge_impl(port, ptr, rust_vec_len, data_len),
         _ => unreachable!(),
     }
 }
@@ -436,6 +478,13 @@ impl SseEncode for String {
     }
 }
 
+impl SseEncode for i64 {
+    // Codec=Sse (Serialization based), see doc to use other codecs
+    fn sse_encode(self, serializer: &mut flutter_rust_bridge::for_generated::SseSerializer) {
+        serializer.cursor.write_i64::<NativeEndian>(self).unwrap();
+    }
+}
+
 impl SseEncode for Vec<u8> {
     // Codec=Sse (Serialization based), see doc to use other codecs
     fn sse_encode(self, serializer: &mut flutter_rust_bridge::for_generated::SseSerializer) {