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[wasm] Use "node:crypto" to polyfill getRandomValues on older node #78696

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Merged
maraf merged 2 commits into from
Nov 23, 2022
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[wasm] Use "node:crypto" to polyfill getRandomValues on older node #78696

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[wasm] Use "node:crypto" to polyfill crypto.getRandomValues on older …
maraf Nov 22, 2022
a4b0fc5
Revert getRandomValues using Math for tests on V8.
maraf Nov 23, 2022
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Revert getRandomValues using Math for tests on V8.
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@maraf
maraf committed Nov 23, 2022
commit a4b0fc5bce1f2d7f4de79fe3616e483d03b05d93
12 changes: 12 additions & 0 deletions src/mono/wasm/test-main.js
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Expand Up @@ -23,6 +23,18 @@ if (is_node && process.versions.node.split(".")[0] < 14) {
throw new Error(`NodeJS at '${process.execPath}' has too low version '${process.versions.node}'`);
}

if (!is_node && !is_browser && typeof globalThis.crypto === 'undefined') {
// **NOTE** this is a simple insecure polyfill for testing purposes only
// /dev/random doesn't work on js shells, so define our own
// See library_fs.js:createDefaultDevices ()
globalThis.crypto = {
getRandomValues: function (buffer) {
for (let i = 0; i < buffer.length; i++)
buffer[i] = (Math.random() * 256) | 0;
}
}
}

let v8args;
if (typeof arguments !== "undefined") {
// this must be captured in top level scope in V8
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