Add android package name support

CHANGELOG.md

@@ -17,6 +17,14 @@
 
 - Changed: The `Client` no longer hardcodes the UV value sent to the `Authenticator` ([#22](https://github.com/1Password/passkey-rs/pull/22)).
 - Changed: The `Client` no longer hardcodes the RK value sent to the `Authenticator` ([#27](https://github.com/1Password/passkey-rs/pull/27)).
+- The client now supports additional user-defined properties in the client data, while also clarifying how the client
+handles client data and its hash.
+	- ⚠ BREAKING: Changed: `register` and `authenticate` take `ClientData<E>` instead of `Option<Vec<u8>>`.
+	- ⚠ BREAKING: Changed: Custom client data hashes are now specified using `DefaultClientDataWithCustomHash(Vec<u8>)` instead of
+		`Some(Vec<u8>)`.
+	- Added: Additional fields can be added to the client data using `DefaultClientDataWithExtra(ExtraData)`.
+- `CollectedClientData` is now generic and supports additional strongly typed fields.
+	- Changed: `CollectedClientData` has changed to `CollectedClientData<E = ()>`
 
 ## Passkey v0.2.0
 ### passkey-types v0.2.0

README.md

@@ -98,7 +98,7 @@ let request = CredentialCreationOptions {
 };
 
 // Now create the credential.
-let my_webauthn_credential: CreatedPublicKeyCredential = my_client.register(origin, request).await?;
+let my_webauthn_credential: CreatedPublicKeyCredential = my_client.register(origin, request, DefaultClientData).await?;
 
 ```
 

passkey-client/src/client_data.rs

@@ -0,0 +1,54 @@
+use serde::Serialize;
+
+/// A trait describing how client data should be generated during a WebAuthn operation.
+pub trait ClientData<E: Serialize> {
+    /// Extra client data to be appended to the automatically generated client data.
+    fn extra_client_data(&self) -> E;
+
+    /// The hash of the client data to be used in the WebAuthn operation.
+    fn client_data_hash(&self) -> Option<Vec<u8>>;
+}
+
+/// The client data and its hash will be automatically generated from the request
+/// according to the WebAuthn specification.
+pub struct DefaultClientData;
+impl ClientData<()> for DefaultClientData {
+    fn extra_client_data(&self) {}
+
+    fn client_data_hash(&self) -> Option<Vec<u8>> {
+        None
+    }
+}
+
+/// The extra client data will be appended to the automatically generated client data.
+/// The hash will be automatically generated from the result client data according to the WebAuthn specification.
+pub struct DefaultClientDataWithExtra<E: Serialize>(pub E);
+impl<E: Serialize + Clone> ClientData<E> for DefaultClientDataWithExtra<E> {
+    fn extra_client_data(&self) -> E {
+        self.0.clone()
+    }
+    fn client_data_hash(&self) -> Option<Vec<u8>> {
+        None
+    }
+}
+
+/// The client data will be automatically generated from the request according to the WebAuthn specification
+/// but it will not be used as a base for the hash. The client data hash will instead be provided by the caller.
+pub struct DefaultClientDataWithCustomHash(pub Vec<u8>);
+impl ClientData<()> for DefaultClientDataWithCustomHash {
+    fn extra_client_data(&self) {}
+
+    fn client_data_hash(&self) -> Option<Vec<u8>> {
+        Some(self.0.clone())
+    }
+}
+
+/// Backwards compatibility with the previous `register` and `authenticate` functions
+/// which only took `Option<Vec<u8>>` as a client data hash.
+impl ClientData<()> for Option<Vec<u8>> {
+    fn extra_client_data(&self) {}
+
+    fn client_data_hash(&self) -> Option<Vec<u8>> {
+        self.clone()
+    }
+}

passkey-client/src/lib.rs

@@ -14,6 +14,9 @@
 //! [version]: https://img.shields.io/crates/v/passkey-client?logo=rust&style=flat
 //! [documentation]: https://img.shields.io/docsrs/passkey-client/latest?logo=docs.rs&style=flat
 //! [Webauthn]: https://w3c.github.io/webauthn/
+mod client_data;
+pub use client_data::*;
+
 use std::borrow::Cow;
 
 use ciborium::{cbor, value::Value};
@@ -28,6 +31,7 @@ use passkey_types::{
     },
     Passkey,
 };
+use serde::Serialize;
 use typeshare::typeshare;
 use url::Url;
 
@@ -163,11 +167,11 @@ where
     /// Register a webauthn `request` from the given `origin`.
     ///
     /// Returns either a [`webauthn::CreatedPublicKeyCredential`] on success or some [`WebauthnError`]
-    pub async fn register(
+    pub async fn register<D: ClientData<E>, E: Serialize + Clone>(
         &mut self,
         origin: &Url,
         request: webauthn::CredentialCreationOptions,
-        client_data_hash: Option<Vec<u8>>,
+        client_data: D,
     ) -> Result<webauthn::CreatedPublicKeyCredential, WebauthnError> {
         // extract inner value of request as there is nothing else of value directly in CredentialCreationOptions
         let request = request.public_key;
@@ -189,18 +193,20 @@ where
             .rp_id_verifier
             .assert_domain(origin, request.rp.id.as_deref())?;
 
-        let collected_client_data = webauthn::CollectedClientData {
+        let collected_client_data = webauthn::CollectedClientData::<E> {
             ty: webauthn::ClientDataType::Create,
             challenge: encoding::base64url(&request.challenge),
             origin: origin.as_str().trim_end_matches('/').to_owned(),
             cross_origin: None,
+            extra_data: client_data.extra_client_data(),
             unknown_keys: Default::default(),
         };
 
         // SAFETY: it is a developer error if serializing this struct fails.
         let client_data_json = serde_json::to_string(&collected_client_data).unwrap();
-        let client_data_json_hash =
-            client_data_hash.unwrap_or_else(|| sha256(client_data_json.as_bytes()).to_vec());
+        let client_data_json_hash = client_data
+            .client_data_hash()
+            .unwrap_or_else(|| sha256(client_data_json.as_bytes()).to_vec());
 
         let cred_props =
             if let Some(true) = request.extensions.as_ref().and_then(|ext| ext.cred_props) {
@@ -293,11 +299,11 @@ where
     /// Authenticate a Webauthn request.
     ///
     /// Returns either an [`webauthn::AuthenticatedPublicKeyCredential`] on success or some [`WebauthnError`].
-    pub async fn authenticate(
+    pub async fn authenticate<D: ClientData<E>, E: Serialize + Clone>(
         &mut self,
         origin: &Url,
         request: webauthn::CredentialRequestOptions,
-        client_data_hash: Option<Vec<u8>>,
+        client_data: D,
     ) -> Result<webauthn::AuthenticatedPublicKeyCredential, WebauthnError> {
         // extract inner value of request as there is nothing else of value directly in CredentialRequestOptions
         let request = request.public_key;
@@ -313,18 +319,20 @@ where
             .rp_id_verifier
             .assert_domain(origin, request.rp_id.as_deref())?;
 
-        let collected_client_data = webauthn::CollectedClientData {
+        let collected_client_data = webauthn::CollectedClientData::<E> {
             ty: webauthn::ClientDataType::Get,
             challenge: encoding::base64url(&request.challenge),
             origin: origin.as_str().trim_end_matches('/').to_owned(),
             cross_origin: None, //Some(false),
+            extra_data: client_data.extra_client_data(),
             unknown_keys: Default::default(),
         };
 
         // SAFETY: it is a developer error if serializing this struct fails.
         let client_data_json = serde_json::to_string(&collected_client_data).unwrap();
-        let client_data_json_hash =
-            client_data_hash.unwrap_or_else(|| sha256(client_data_json.as_bytes()).to_vec());
+        let client_data_json_hash = client_data
+            .client_data_hash()
+            .unwrap_or_else(|| sha256(client_data_json.as_bytes()).to_vec());
 
         let ctap2_response = self
             .authenticator

passkey-client/src/tests/mod.rs

@@ -1,7 +1,10 @@
 use super::*;
 use coset::iana;
 use passkey_authenticator::{MemoryStore, MockUserValidationMethod, UserCheck};
-use passkey_types::{ctap2, rand::random_vec, Bytes};
+use passkey_types::{
+    ctap2, encoding::try_from_base64url, rand::random_vec, webauthn::CollectedClientData, Bytes,
+};
+use serde::Deserialize;
 use url::{ParseError, Url};
 
 fn good_credential_creation_options() -> webauthn::PublicKeyCredentialCreationOptions {
@@ -91,7 +94,7 @@ async fn create_and_authenticate() {
         public_key: good_credential_creation_options(),
     };
     let cred = client
-        .register(&origin, options, None)
+        .register(&origin, options, DefaultClientData)
         .await
         .expect("failed to register with options");
 
@@ -101,11 +104,79 @@ async fn create_and_authenticate() {
         public_key: good_credential_request_options(credential_id),
     };
     client
-        .authenticate(&origin, auth_options, None)
+        .authenticate(&origin, auth_options, DefaultClientData)
         .await
         .expect("failed to authenticate with freshly created credential");
 }
 
+#[tokio::test]
+async fn create_and_authenticate_with_extra_client_data() {
+    #[derive(Clone, Serialize, Deserialize)]
+    struct AndroidClientData {
+        android_package_name: String,
+    }
+    let auth = Authenticator::new(
+        ctap2::Aaguid::new_empty(),
+        MemoryStore::new(),
+        uv_mock_with_creation(2),
+    );
+    let mut client = Client::new(auth);
+
+    let origin = Url::parse("https://future.1password.com").unwrap();
+    let options = webauthn::CredentialCreationOptions {
+        public_key: good_credential_creation_options(),
+    };
+    let extra_data = AndroidClientData {
+        android_package_name: "com.example.app".to_owned(),
+    };
+    let cred = client
+        .register(
+            &origin,
+            options,
+            DefaultClientDataWithExtra(extra_data.clone()),
+        )
+        .await
+        .expect("failed to register with options");
+
+    let returned_base64url_client_data_json: String = cred.response.client_data_json.into();
+    let returned_client_data_json =
+        try_from_base64url(returned_base64url_client_data_json.as_str())
+            .expect("could not base64url decode client data");
+    let returned_client_data: CollectedClientData<AndroidClientData> =
+        serde_json::from_slice(&returned_client_data_json)
+            .expect("could not json deserialize client data");
+    assert_eq!(
+        returned_client_data.extra_data.android_package_name,
+        "com.example.app"
+    );
+
+    let credential_id = cred.raw_id;
+
+    let auth_options = webauthn::CredentialRequestOptions {
+        public_key: good_credential_request_options(credential_id),
+    };
+    let result = client
+        .authenticate(
+            &origin,
+            auth_options,
+            DefaultClientDataWithExtra(extra_data.clone()),
+        )
+        .await
+        .expect("failed to authenticate with freshly created credential");
+
+    let returned_base64url_client_data_json: String = result.response.client_data_json.into();
+    let returned_client_data_json =
+        try_from_base64url(returned_base64url_client_data_json.as_str())
+            .expect("could not base64url decode client data");
+    let returned_client_data: CollectedClientData<AndroidClientData> =
+        serde_json::from_slice(&returned_client_data_json)
+            .expect("could not json deserialize client data");
+    assert_eq!(
+        returned_client_data.extra_data.android_package_name,
+        "com.example.app"
+    );
+}
+
 #[tokio::test]
 async fn create_and_authenticate_with_origin_subdomain() {
     let auth = Authenticator::new(
@@ -120,7 +191,7 @@ async fn create_and_authenticate_with_origin_subdomain() {
         public_key: good_credential_creation_options(),
     };
     let cred = client
-        .register(&origin, options, None)
+        .register(&origin, options, DefaultClientData)
         .await
         .expect("failed to register with options");
 
@@ -136,7 +207,7 @@ async fn create_and_authenticate_with_origin_subdomain() {
         public_key: good_credential_request_options(cred.raw_id),
     };
     let res = client
-        .authenticate(&origin, auth_options, None)
+        .authenticate(&origin, auth_options, DefaultClientData)
         .await
         .expect("failed to authenticate with freshly created credential");
     let att_obj = ctap2::AuthenticatorData::from_slice(&res.response.authenticator_data)
@@ -164,7 +235,7 @@ async fn create_and_authenticate_without_rp_id() {
         },
     };
     let cred = client
-        .register(&origin, options, None)
+        .register(&origin, options, DefaultClientData)
         .await
         .expect("failed to register with options");
 
@@ -183,7 +254,7 @@ async fn create_and_authenticate_without_rp_id() {
         },
     };
     let res = client
-        .authenticate(&origin, auth_options, None)
+        .authenticate(&origin, auth_options, DefaultClientData)
         .await
         .expect("failed to authenticate with freshly created credential");
     let att_obj = ctap2::AuthenticatorData::from_slice(&res.response.authenticator_data)
@@ -208,7 +279,7 @@ async fn create_and_authenticate_without_cred_params() {
         },
     };
     let cred = client
-        .register(&origin, options, None)
+        .register(&origin, options, DefaultClientData)
         .await
         .expect("failed to register with options");
 
@@ -218,7 +289,7 @@ async fn create_and_authenticate_without_cred_params() {
         public_key: good_credential_request_options(credential_id),
     };
     client
-        .authenticate(&origin, auth_options, None)
+        .authenticate(&origin, auth_options, DefaultClientData)
         .await
         .expect("failed to authenticate with freshly created credential");
 }
@@ -355,7 +426,7 @@ async fn client_register_triggers_uv_when_uv_is_required() {
 
     // Act & Assert
     client
-        .register(&origin, options, None)
+        .register(&origin, options, DefaultClientData)
         .await
         .expect("failed to register with options");
 }
@@ -382,7 +453,7 @@ async fn client_register_does_not_trigger_uv_when_uv_is_discouraged() {
 
     // Act & Assert
     client
-        .register(&origin, options, None)
+        .register(&origin, options, DefaultClientData)
         .await
         .expect("failed to register with options");
 }

passkey-types/Cargo.toml

@@ -3,7 +3,7 @@ name = "passkey-types"
 description = "Rust type definitions for the webauthn and CTAP specifications"
 include = ["src/", "../LICENSE-APACHE", "../LICENSE-MIT"]
 readme = "README.md"
-version = "0.2.0"
+version = "0.2.1"
 authors.workspace = true
 repository.workspace = true
 edition.workspace = true