@shopify/shopify-api/dist/cjs/lib/auth/oauth/safe-compare.js

Shopify API Library for Node - accelerate development with support for authentication, graphql proxy, webhooks

'use strict';

var error = require('../../error.js');

const safeCompare = (strA, strB) => {
    if (typeof strA === typeof strB) {
        const enc = new TextEncoder();
        const buffA = enc.encode(JSON.stringify(strA));
        const buffB = enc.encode(JSON.stringify(strB));
        if (buffA.length === buffB.length) {
            return timingSafeEqual(buffA, buffB);
        }
    }
    else {
        throw new error.SafeCompareError(`Mismatched data types provided: ${typeof strA} and ${typeof strB}`);
    }
    return false;
};
// Buffer must be same length for this function to be secure.
function timingSafeEqual(bufA, bufB) {
    const viewA = new Uint8Array(bufA);
    const viewB = new Uint8Array(bufB);
    let out = 0;
    for (let i = 0; i < viewA.length; i++) {
        out |= viewA[i] ^ viewB[i];
    }
    return out === 0;
}

exports.safeCompare = safeCompare;
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