Fix layer violations

src/vs/workbench/browser/webview.ts

@@ -0,0 +1,25 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+/**
+ * Returns a sha-256 composed of `parentOrigin` and `salt` converted to base 32
+ */
+export async function parentOriginHash(parentOrigin: string, salt: string): Promise<string> {
+	// This same code is also inlined at `src/vs/workbench/services/extensions/worker/webWorkerExtensionHostIframe.html`
+	if (!crypto.subtle) {
+		throw new Error(`Can't compute sha-256`);
+	}
+	const strData = JSON.stringify({ parentOrigin, salt });
+	const encoder = new TextEncoder();
+	const arrData = encoder.encode(strData);
+	const hash = await crypto.subtle.digest('sha-256', arrData);
+	return sha256AsBase32(hash);
+}
+
+function sha256AsBase32(bytes: ArrayBuffer): string {
+	const array = Array.from(new Uint8Array(bytes));
+	const hexArray = array.map(b => b.toString(16).padStart(2, '0')).join('');
+	// sha256 has 256 bits, so we need at most ceil(lg(2^256-1)/lg(32)) = 52 chars to represent it in base 32
+	return BigInt(`0x${hexArray}`).toString(32).padStart(52, '0');
+}