uuid-core/dist/uuid-v5.js

A simple UUID generator library for Node.js, NestJS, and Next.js

import { createHash } from "crypto";
export function v5(name, namespace) {
    const nsBytes = Buffer.from(namespace.replace(/-/g, ""), "hex");
    const nameBytes = Buffer.from(name);
    const input = Buffer.concat([nsBytes, nameBytes]);
    const hash = createHash("sha1").update(input).digest();
    const output = Buffer.alloc(16);
    hash.copy(output, 0, 0, 16);
    output[6] = (output[6] & 0x0f) | 0x50;
    output[8] = (output[8] & 0x3f) | 0x80;
    const hex = output.toString("hex");
    return [
        hex.slice(0, 8),
        hex.slice(8, 12),
        hex.slice(12, 16),
        hex.slice(16, 20),
        hex.slice(20, 32),
    ].join("-");
}