forked from mirrors/firefish
25 lines
571 B
TypeScript
25 lines
571 B
TypeScript
import * as crypto from "node:crypto";
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const L_CHARS = "0123456789abcdefghijklmnopqrstuvwxyz";
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const LU_CHARS =
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"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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export function secureRndstr(length = 32, useLU = true): string {
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const chars = useLU ? LU_CHARS : L_CHARS;
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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(
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(crypto.randomBytes(1).readUInt8(0) / 0xff) * chars_len,
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);
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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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