c2370a1be6
* chore: Add the SPDX information to each file Add copyright and licensing information as defined in version 3.0 of the REUSE Specification. * tweak format --------- Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
25 lines
654 B
TypeScript
25 lines
654 B
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and other misskey contributors
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import * as crypto from 'node:crypto';
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export const L_CHARS = '0123456789abcdefghijklmnopqrstuvwxyz';
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const LU_CHARS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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export function secureRndstr(length = 32, { chars = LU_CHARS } = {}): string {
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const chars_len = chars.length;
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let str = '';
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for (let i = 0; i < length; i++) {
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let rand = Math.floor((crypto.randomBytes(1).readUInt8(0) / 0xFF) * chars_len);
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if (rand === chars_len) {
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rand = chars_len - 1;
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}
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str += chars.charAt(rand);
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}
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return str;
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}
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