Change adapter nonce API to be more generic.

packages/adapter-cloudflare-workers/files/shims.js

@@ -1 +1 @@
-export const generateCspNonce = () => btoa(crypto.getRandomValues(new Uint32Array(4)));
+export const generateRandomString = (bytes) => btoa(crypto.getRandomValues(new Uint8Array(bytes)));

packages/adapter-netlify/files/shims.js

@@ -1,4 +1,4 @@
 import { randomBytes } from 'crypto';
 export { fetch, Response, Request, Headers } from '@sveltejs/kit/install-fetch';
 
-export const generateCspNonce = () => randomBytes(16).toString('base64');
+export const generateRandomString = (bytes) => randomBytes(bytes).toString('base64');

packages/adapter-node/src/shims.js

@@ -2,7 +2,7 @@ import { createRequire } from 'module';
 import { randomBytes } from 'crypto';
 export { fetch, Response, Request, Headers } from '@sveltejs/kit/install-fetch';
 
-export const generateCspNonce = () => randomBytes(16).toString('base64');
+export const generateRandomString = (bytes) => randomBytes(bytes).toString('base64');
 
 // esbuild automatically renames "require"
 // So we still have to use Object.defineProperty here

packages/adapter-vercel/files/shims.js

@@ -1,4 +1,4 @@
 import { randomBytes } from 'crypto';
 export { fetch, Response, Request, Headers } from '@sveltejs/kit/install-fetch';
 
-export const generateCspNonce = () => randomBytes(16).toString('base64');
+export const generateRandomString = (bytes) => randomBytes(bytes).toString('base64');

packages/kit/src/runtime/server/index.js

@@ -39,7 +39,7 @@ export async function respond(incoming, options, state = {}) {
 	let nonce;
 	if (!state.prerender && options.cspNonce) {
 		try {
-			nonce = generateCspNonce();
+			nonce = generateRandomString(16);
 		} catch (e) {
 			if (e instanceof ReferenceError) {
 				console.warn(

packages/kit/types/globals.d.ts

@@ -1 +1 @@
-declare const generateCspNonce: () => string;
+declare const generateRandomString: (bytes: number) => string;