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35 lines
1.1 KiB
TypeScript
35 lines
1.1 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import * as msg from "gen/cli/msg_generated";
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import * as flatbuffers from "./flatbuffers";
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import * as dispatch from "./dispatch";
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import { assert } from "./util";
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function req(
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typedArray: ArrayBufferView
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): [flatbuffers.Builder, msg.Any, flatbuffers.Offset, ArrayBufferView] {
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const builder = flatbuffers.createBuilder();
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const inner = msg.GetRandomValues.createGetRandomValues(builder);
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return [builder, msg.Any.GetRandomValues, inner, typedArray];
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}
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/** Synchronously collects cryptographically secure random values. The
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* underlying CSPRNG in use is Rust's `rand::rngs::ThreadRng`.
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*
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* const arr = new Uint8Array(32);
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* crypto.getRandomValues(arr);
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*/
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export function getRandomValues<
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T extends
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| Int8Array
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| Uint8Array
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| Uint8ClampedArray
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| Int16Array
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| Uint16Array
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| Int32Array
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| Uint32Array
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>(typedArray: T): T {
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assert(typedArray !== null, "Input must not be null");
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assert(typedArray.length <= 65536, "Input must not be longer than 65536");
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dispatch.sendSync(...req(typedArray as ArrayBufferView));
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return typedArray;
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}
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