1 files changed, 96 insertions, 0 deletions
diff --git a/packages/taler-wallet-core/src/crypto/workers/synchronousWorkerPlain.ts b/packages/taler-wallet-core/src/crypto/workers/synchronousWorkerPlain.ts
new file mode 100644
index 000000000..058896828
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+++ b/packages/taler-wallet-core/src/crypto/workers/synchronousWorkerPlain.ts
@@ -0,0 +1,96 @@
+/*
+ This file is part of GNU Taler
+ (C) 2019 GNUnet e.V.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Imports.
+ */
+import { Logger } from "@gnu-taler/taler-util";
+import {
+  nativeCryptoR,
+  TalerCryptoInterfaceR,
+} from "../cryptoImplementation.js";
+import { CryptoWorker } from "./cryptoWorkerInterface.js";
+import { processRequestWithImpl } from "./worker-common.js";
+
+const logger = new Logger("synchronousWorker.ts");
+
+/**
+ * Worker implementation that synchronously executes cryptographic
+ * operations.
+ */
+export class SynchronousCryptoWorkerPlain implements CryptoWorker {
+  /**
+   * Function to be called when we receive a message from the worker thread.
+   */
+  onmessage: undefined | ((m: any) => void);
+
+  /**
+   * Function to be called when we receive an error from the worker thread.
+   */
+  onerror: undefined | ((m: any) => void);
+
+  cryptoImplR: TalerCryptoInterfaceR;
+
+  constructor() {
+    this.onerror = undefined;
+    this.onmessage = undefined;
+    this.cryptoImplR = { ...nativeCryptoR };
+  }
+
+  /**
+   * Add an event listener for either an "error" or "message" event.
+   */
+  addEventListener(event: "message" | "error", fn: (x: any) => void): void {
+    switch (event) {
+      case "message":
+        this.onmessage = fn;
+        break;
+      case "error":
+        this.onerror = fn;
+        break;
+    }
+  }
+
+  private dispatchMessage(msg: any): void {
+    if (this.onmessage) {
+      this.onmessage(msg);
+    }
+  }
+
+  /**
+   * Send a message to the worker thread.
+   */
+  postMessage(msg: any): void {
+    const handleRequest = async () => {
+      const responseMsg = await processRequestWithImpl(msg, this.cryptoImplR);
+      try {
+        setTimeout(() => this.dispatchMessage(responseMsg), 0);
+      } catch (e) {
+        logger.error("got error during dispatch", e);
+      }
+    };
+    handleRequest().catch((e) => {
+      logger.error("Error while handling crypto request:", e);
+    });
+  }
+
+  /**
+   * Forcibly terminate the worker thread.
+   */
+  terminate(): void {
+    // This is a no-op.
+  }
+}