Passkey Uniffi API layer

crates/bitwarden-uniffi/Cargo.toml

@@ -19,6 +19,7 @@ bench = false
 
 [dependencies]
 async-lock = "3.3.0"
+async-trait = "0.1.80"
 bitwarden = { workspace = true, features = ["mobile", "internal"] }
 bitwarden-crypto = { workspace = true, features = ["mobile"] }
 bitwarden-generators = { workspace = true, features = ["mobile"] }

crates/bitwarden-uniffi/src/error.rs

@@ -14,6 +14,22 @@ impl From<bitwarden::error::Error> for BitwardenError {
     }
 }
 
+impl Into<bitwarden::error::Error> for BitwardenError {
+    fn into(self) -> bitwarden::error::Error {
+        match self {
+            BitwardenError::E(e) => e,
+        }
+    }
+}
+
+// Need to implement this From<> impl in order to handle unexpected callback errors.  See the
+// Callback Interfaces section of the handbook for more info.
+impl From<uniffi::UnexpectedUniFFICallbackError> for BitwardenError {
+    fn from(e: uniffi::UnexpectedUniFFICallbackError) -> Self {
+        Self::E(bitwarden::error::Error::UniffiCallback(e))
+    }
+}
+
 impl Display for BitwardenError {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {

crates/bitwarden-uniffi/src/platform/fido2.rs

@@ -0,0 +1,233 @@
+use std::sync::Arc;
+
+use bitwarden::{
+    error::Result as BitResult,
+    platform::fido2::{
+        CheckUserOptions, CheckUserResult, ClientData, GetAssertionRequest, GetAssertionResult,
+        MakeCredentialRequest, MakeCredentialResult,
+        PublicKeyCredentialAuthenticatorAssertionResponse,
+        PublicKeyCredentialAuthenticatorAttestationResponse,
+    },
+    vault::{Cipher, CipherView, Fido2Credential, Fido2CredentialView},
+};
+
+use crate::{error::Result, Client};
+
+#[derive(uniffi::Object)]
+pub struct ClientFido2(pub(crate) Arc<Client>);
+
+#[uniffi::export]
+impl ClientFido2 {
+    pub fn authenticator(
+        self: Arc<Self>,
+        user_interface: Arc<dyn UserInterface>,
+        credential_store: Arc<dyn CredentialStore>,
+    ) -> Arc<ClientFido2Authenticator> {
+        Arc::new(ClientFido2Authenticator(
+            self.0.clone(),
+            user_interface,
+            credential_store,
+        ))
+    }
+
+    pub fn client(
+        self: Arc<Self>,
+        user_interface: Arc<dyn UserInterface>,
+        credential_store: Arc<dyn CredentialStore>,
+    ) -> Arc<ClientFido2Client> {
+        Arc::new(ClientFido2Client(ClientFido2Authenticator(
+            self.0.clone(),
+            user_interface,
+            credential_store,
+        )))
+    }
+}
+
+#[derive(uniffi::Object)]
+pub struct ClientFido2Authenticator(
+    pub(crate) Arc<Client>,
+    pub(crate) Arc<dyn UserInterface>,
+    pub(crate) Arc<dyn CredentialStore>,
+);
+
+#[uniffi::export]
+impl ClientFido2Authenticator {
+    pub async fn make_credential(
+        &self,
+        request: MakeCredentialRequest,
+    ) -> Result<MakeCredentialResult> {
+        let mut client = self.0 .0.write().await;
+
+        let mut platform = client.platform();
+        let mut fido2 = platform.fido2();
+        let mut auth = fido2.create_authenticator(
+            UniffiTraitBridge(self.1.as_ref()),
+            UniffiTraitBridge(self.2.as_ref()),
+        )?;
+
+        let result = auth.make_credential(request).await?;
+        Ok(result)
+    }
+
+    pub async fn get_assertion(&self, request: GetAssertionRequest) -> Result<GetAssertionResult> {
+        let mut client = self.0 .0.write().await;
+
+        let mut platform = client.platform();
+        let mut fido2 = platform.fido2();
+        let mut auth = fido2.create_authenticator(
+            UniffiTraitBridge(self.1.as_ref()),
+            UniffiTraitBridge(self.2.as_ref()),
+        )?;
+
+        let result = auth.get_assertion(request).await?;
+        Ok(result)
+    }
+
+    pub async fn silently_discover_credentials(
+        &self,
+        rp_id: String,
+    ) -> Result<Vec<Fido2CredentialView>> {
+        let mut client = self.0 .0.write().await;
+
+        let mut platform = client.platform();
+        let mut fido2 = platform.fido2();
+        let mut auth = fido2.create_authenticator(
+            UniffiTraitBridge(self.1.as_ref()),
+            UniffiTraitBridge(self.2.as_ref()),
+        )?;
+
+        let result = auth.silently_discover_credentials(rp_id).await?;
+        Ok(result)
+    }
+}
+
+#[derive(uniffi::Object)]
+pub struct ClientFido2Client(pub(crate) ClientFido2Authenticator);
+
+#[uniffi::export]
+impl ClientFido2Client {
+    pub async fn register(
+        &self,
+        origin: String,
+        request: String,
+        client_data: ClientData,
+    ) -> Result<PublicKeyCredentialAuthenticatorAttestationResponse> {
+        let mut client = self.0 .0 .0.write().await;
+
+        let mut platform = client.platform();
+        let mut fido2 = platform.fido2();
+        let mut client = fido2.create_client(
+            UniffiTraitBridge(self.0 .1.as_ref()),
+            UniffiTraitBridge(self.0 .2.as_ref()),
+        )?;
+
+        let result = client.register(origin, request, client_data).await?;
+        Ok(result)
+    }
+
+    pub async fn authenticate(
+        &self,
+        origin: String,
+        request: String,
+        client_data: ClientData,
+    ) -> Result<PublicKeyCredentialAuthenticatorAssertionResponse> {
+        let mut client = self.0 .0 .0.write().await;
+
+        let mut platform = client.platform();
+        let mut fido2 = platform.fido2();
+        let mut client = fido2.create_client(
+            UniffiTraitBridge(self.0 .1.as_ref()),
+            UniffiTraitBridge(self.0 .2.as_ref()),
+        )?;
+
+        let result = client.authenticate(origin, request, client_data).await?;
+        Ok(result)
+    }
+}
+
+// Note that uniffi doesn't support external traits for now it seems, so we have to duplicate them
+// here.
+
+#[uniffi::export(with_foreign)]
+#[async_trait::async_trait]
+pub trait UserInterface: Send + Sync {
+    async fn check_user(
+        &self,
+        options: CheckUserOptions,
+        credential: Option<CipherView>,
+    ) -> Result<CheckUserResult>;
+    async fn pick_credential_for_authentication(
+        &self,
+        available_credentials: Vec<Cipher>,
+    ) -> Result<CipherView>;
+    async fn pick_credential_for_creation(
+        &self,
+        available_credentials: Vec<Cipher>,
+        new_credential: Fido2Credential,
+    ) -> Result<CipherView>;
+}
+
+#[uniffi::export(with_foreign)]
+#[async_trait::async_trait]
+pub trait CredentialStore: Send + Sync {
+    async fn find_credentials(
+        &self,
+        ids: Option<Vec<Vec<u8>>>,
+        rip_id: String,
+    ) -> Result<Vec<Cipher>>;
+
+    async fn save_credential(&self, cred: Cipher) -> Result<()>;
+}
+
+struct UniffiTraitBridge<T>(T);
+
+#[async_trait::async_trait]
+impl bitwarden::platform::fido2::CredentialStore for UniffiTraitBridge<&dyn CredentialStore> {
+    async fn find_credentials(
+        &self,
+        ids: Option<Vec<Vec<u8>>>,
+        rip_id: String,
+    ) -> BitResult<Vec<Cipher>> {
+        self.0
+            .find_credentials(ids, rip_id)
+            .await
+            .map_err(Into::into)
+    }
+
+    async fn save_credential(&self, cred: Cipher) -> BitResult<()> {
+        self.0.save_credential(cred).await.map_err(Into::into)
+    }
+}
+
+#[async_trait::async_trait]
+impl bitwarden::platform::fido2::UserInterface for UniffiTraitBridge<&dyn UserInterface> {
+    async fn check_user(
+        &self,
+        options: CheckUserOptions,
+        credential: Option<CipherView>,
+    ) -> BitResult<CheckUserResult> {
+        self.0
+            .check_user(options, credential)
+            .await
+            .map_err(Into::into)
+    }
+    async fn pick_credential_for_authentication(
+        &self,
+        available_credentials: Vec<Cipher>,
+    ) -> BitResult<CipherView> {
+        self.0
+            .pick_credential_for_authentication(available_credentials)
+            .await
+            .map_err(Into::into)
+    }
+    async fn pick_credential_for_creation(
+        &self,
+        available_credentials: Vec<Cipher>,
+        new_credential: Fido2Credential,
+    ) -> BitResult<CipherView> {
+        self.0
+            .pick_credential_for_creation(available_credentials, new_credential)
+            .await
+            .map_err(Into::into)
+    }
+}

crates/bitwarden-uniffi/src/platform/mod.rs

@@ -4,6 +4,8 @@ use bitwarden::platform::FingerprintRequest;
 
 use crate::{error::Result, Client};
 
+mod fido2;
+
 #[derive(uniffi::Object)]
 pub struct ClientPlatform(pub(crate) Arc<Client>);
 
@@ -37,4 +39,9 @@ impl ClientPlatform {
         self.0 .0.write().await.load_flags(flags);
         Ok(())
     }
+
+    /// FIDO2 operations
+    pub fn fido2(self: Arc<Self>) -> Arc<fido2::ClientFido2> {
+        Arc::new(fido2::ClientFido2(self.0.clone()))
+    }
 }

crates/bitwarden/Cargo.toml

@@ -31,6 +31,7 @@ mobile = [
 wasm-bindgen = ["chrono/wasmbind"]
 
 [dependencies]
+async-trait = ">=0.1.80, <0.2"
 base64 = ">=0.21.2, <0.22"
 bitwarden-api-api = { workspace = true }
 bitwarden-api-identity = { workspace = true }
@@ -46,6 +47,7 @@ chrono = { version = ">=0.4.26, <0.5", features = [
 getrandom = { version = ">=0.2.9, <0.3", features = ["js"] }
 hmac = ">=0.12.1, <0.13"
 log = ">=0.4.18, <0.5"
+passkey = { git = "https://github.com/bitwarden/passkey-rs", rev = "12da886102707f87ad97e499c857c0857ece0b85" }
 rand = ">=0.8.5, <0.9"
 reqwest = { version = ">=0.12, <0.13", features = [
     "http2",

crates/bitwarden/src/error.rs

@@ -8,6 +8,7 @@ use bitwarden_api_identity::apis::Error as IdentityError;
 use bitwarden_exporters::ExportError;
 #[cfg(feature = "internal")]
 use bitwarden_generators::{PassphraseError, PasswordError, UsernameError};
+use passkey::client::WebauthnError;
 use reqwest::StatusCode;
 use thiserror::Error;
 
@@ -68,10 +69,23 @@ pub enum Error {
     #[error(transparent)]
     ExportError(#[from] ExportError),
 
+    #[error("Webauthn error: {0:?}")]
+    WebauthnError(passkey::client::WebauthnError),
+
+    #[cfg(feature = "mobile")]
+    #[error("Uniffi callback error: {0}")]
+    UniffiCallback(#[from] uniffi::UnexpectedUniFFICallbackError),
+
     #[error("Internal error: {0}")]
     Internal(Cow<'static, str>),
 }
 
+impl From<WebauthnError> for Error {
+    fn from(e: WebauthnError) -> Self {
+        Self::WebauthnError(e)
+    }
+}
+
 impl From<String> for Error {
     fn from(s: String) -> Self {
         Self::Internal(s.into())

crates/bitwarden/src/platform/client_platform.rs

@@ -1,6 +1,6 @@
 use super::{
     generate_fingerprint::{generate_fingerprint, generate_user_fingerprint},
-    FingerprintRequest, FingerprintResponse,
+    ClientFido2, FingerprintRequest, FingerprintResponse,
 };
 use crate::{error::Result, Client};
 
@@ -16,6 +16,12 @@ impl<'a> ClientPlatform<'a> {
     pub fn user_fingerprint(self, fingerprint_material: String) -> Result<String> {
         generate_user_fingerprint(self.client, fingerprint_material)
     }
+
+    pub fn fido2(&'a mut self) -> ClientFido2<'a> {
+        ClientFido2 {
+            client: self.client,
+        }
+    }
 }
 
 impl<'a> Client {