mdb-reader/lib/browser/crypto/deriveKey.js

JavaScript library to read data from Access databases

import { fixBufferLength, intToBuffer } from "../util.js";
import { hash } from "./hash.js";
/**
 * Can probably be replaced with `crypto.webcrypto.subtle.derivekey(...)` once node 16 support is dropped
 */
export function deriveKey(password, blockBytes, algorithm, salt, iterations, keyByteLength) {
    const baseHash = hash(algorithm, [salt, password]);
    const iterHash = iterateHash(algorithm, baseHash, iterations);
    const finalHash = hash(algorithm, [iterHash, blockBytes]);
    return fixBufferLength(finalHash, keyByteLength, 0x36);
}
function iterateHash(algorithm, baseBuffer, iterations) {
    let iterHash = baseBuffer;
    for (let i = 0; i < iterations; ++i) {
        iterHash = hash(algorithm, [intToBuffer(i), iterHash]);
    }
    return iterHash;
}