magento2-api-wrapper/esm/hash/createHmacHasher.js

Minimal Magento 2 API library. Both node and browser compatible

export function createHmacHasher(hash) {
    return async function hmacHasher(key, content) {
        // encoder to convert string to Uint8Array
        const enc = new TextEncoder();
        const algo = { name: "HMAC", hash };
        const cryptKey = await crypto.subtle.importKey("raw", enc.encode(key), algo, false, ["sign", "verify"]);
        const signature = await crypto.subtle.sign(algo, cryptKey, enc.encode(content));
        const b = new Uint8Array(signature);
        // base64 digest
        return btoa(String.fromCharCode(...b));
    };
}