1 files changed, 72 insertions, 0 deletions
diff --git a/packages/taler-wallet-core/src/index.browser.ts b/packages/taler-wallet-core/src/index.browser.ts
new file mode 100644
index 000000000..d0b82d3e0
--- /dev/null
+++ b/packages/taler-wallet-core/src/index.browser.ts
@@ -0,0 +1,72 @@
+/*
+ This file is part of TALER
+ (C) 2019 GNUnet e.V.
+
+ 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.
+
+ 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
+ TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+export * from "./index.js";
+
+import { setPRNG } from './crypto/primitives/nacl-fast.js';
+// export default API;
+
+function cleanup(arr: Uint8Array): void {
+  for (let i = 0; i < arr.length; i++) arr[i] = 0;
+}
+
+// Initialize PRNG if environment provides CSPRNG.
+// If not, methods calling randombytes will throw.
+// @ts-ignore-error
+const cr = typeof self !== "undefined" ? self.crypto || self.msCrypto : null;
+
+const QUOTA = 65536;
+setPRNG(function (x: Uint8Array, n: number) {
+  let i;
+  const v = new Uint8Array(n);
+  for (i = 0; i < n; i += QUOTA) {
+    cr.getRandomValues(v.subarray(i, i + Math.min(n - i, QUOTA)));
+  }
+  for (i = 0; i < n; i++) x[i] = v[i];
+  cleanup(v);
+});
+// function initPRNG() {
+//   // Initialize PRNG if environment provides CSPRNG.
+//   // If not, methods calling randombytes will throw.
+//   // @ts-ignore-error
+//   const cr = typeof self !== "undefined" ? self.crypto || self.msCrypto : null;
+//   if (cr && cr.getRandomValues) {
+//     // Browsers.
+//     const QUOTA = 65536;
+//     setPRNG(function (x: Uint8Array, n: number) {
+//       let i;
+//       const v = new Uint8Array(n);
+//       for (i = 0; i < n; i += QUOTA) {
+//         cr.getRandomValues(v.subarray(i, i + Math.min(n - i, QUOTA)));
+//       }
+//       for (i = 0; i < n; i++) x[i] = v[i];
+//       cleanup(v);
+//     });
+//   } else if (typeof require !== "undefined") {
+//     // Node.js.
+//     // eslint-disable-next-line @typescript-eslint/no-var-requires
+//     const cr = require("crypto");
+//     if (cr && cr.randomBytes) {
+//       setPRNG(function (x: Uint8Array, n: number) {
+//         const v = cr.randomBytes(n);
+//         for (let i = 0; i < n; i++) x[i] = v[i];
+//         cleanup(v);
+//       });
+//     }
+//   }
+// }
+
+// initPRNG();
+\ No newline at end of file