[EC-598] feat: start creating separate authenticator service

libs/common/src/webauthn/abstractions/fido2-authenticator.service.abstraction.ts

@@ -0,0 +1,44 @@
+export abstract class Fido2AuthenticatorService {
+  makeCredential: (params: Fido2AuthenticatorMakeCredentialsParams) => void;
+}
+
+/**
+ * Parameters for {@link Fido2AuthenticatorService.makeCredential}
+ *
+ * @note
+ * This interface uses the parameter names defined in `fido-v2.0-ps-20190130`
+ * but the parameter values use the corresponding data structures defined in
+ * `WD-webauthn-3-20210427`. This is to avoid the unnecessary complexity of
+ * converting data to CBOR and back.
+ */
+export interface Fido2AuthenticatorMakeCredentialsParams {
+  clientDataHash: BufferSource;
+  rp: {
+    name: string;
+    id?: string;
+  };
+  user: {
+    name: string;
+    displayName: string;
+    id: BufferSource;
+  };
+  pubKeyCredParams: {
+    alg: number;
+    // type: "public-key"; // not used
+  }[];
+  excludeList?: {
+    id: BufferSource;
+    transports?: ("ble" | "internal" | "nfc" | "usb")[];
+    // type: "public-key"; // not used
+  }[];
+  extensions?: {
+    appid?: string;
+    appidExclude?: string;
+    credProps?: boolean;
+    uvm?: boolean;
+  };
+  options?: {
+    rk?: boolean;
+    uv?: boolean;
+  };
+}

libs/common/src/webauthn/services/fido2-authenticator.service.spec.ts

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+describe("FidoAuthenticatorService", () => {
+  describe("authenticatorMakeCredential", () => {
+    test.skip("To be implemented");
+  });
+});

libs/common/src/webauthn/services/fido2-authenticator.service.ts

@@ -0,0 +1,12 @@
+import {
+  Fido2AuthenticatorMakeCredentialsParams,
+  Fido2AuthenticatorService as Fido2AuthenticatorServiceAbstraction,
+} from "../abstractions/fido2-authenticator.service.abstraction";
+
+/**
+ * Bitwarden implementation of the Authenticator API described by the FIDO Alliance
+ * https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html
+ */
+export class Fido2AuthenticatorService implements Fido2AuthenticatorServiceAbstraction {
+  makeCredential: (params: Fido2AuthenticatorMakeCredentialsParams) => void;
+}