Software: Apache. PHP/8.1.30 

uname -a: Linux server1.tuhinhossain.com 5.15.0-163-generic #173-Ubuntu SMP Tue Oct 14 17:51:00 UTC
2025 x86_64 

uid=1002(picotech) gid=1003(picotech) groups=1003(picotech),0(root)  

Safe-mode: OFF (not secure)

/home/picotech/domains/note.picotech.app/public_html/node_modules/@smithy/signature-v4/dist-es/   drwxr-xr-x
Free 23.45 GB of 117.98 GB (19.88%)
                            Encoder    Tools    Proc.    FTP brute    Sec.    SQL    PHP-code    Update    Self remove    Logout    

Viewing file:     credentialDerivation.js (1.41 KB)      -rw-r--r--

import { toHex } from "@smithy/util-hex-encoding";
import { toUint8Array } from "@smithy/util-utf8";
import { KEY_TYPE_IDENTIFIER, MAX_CACHE_SIZE } from "./constants";
const signingKeyCache = {};
const cacheQueue = [];
export const createScope = (shortDate, region, service) => `${shortDate}/${region}/${service}/${KEY_TYPE_IDENTIFIER}`;
export const getSigningKey = async (sha256Constructor, credentials, shortDate, region, service) => {
    const credsHash = await hmac(sha256Constructor, credentials.secretAccessKey, credentials.accessKeyId);
    const cacheKey = `${shortDate}:${region}:${service}:${toHex(credsHash)}:${credentials.sessionToken}`;
    if (cacheKey in signingKeyCache) {
        return signingKeyCache[cacheKey];
    }
    cacheQueue.push(cacheKey);
    while (cacheQueue.length > MAX_CACHE_SIZE) {
        delete signingKeyCache[cacheQueue.shift()];
    }
    let key = `AWS4${credentials.secretAccessKey}`;
    for (const signable of [shortDate, region, service, KEY_TYPE_IDENTIFIER]) {
        key = await hmac(sha256Constructor, key, signable);
    }
    return (signingKeyCache[cacheKey] = key);
};
export const clearCredentialCache = () => {
    cacheQueue.length = 0;
    Object.keys(signingKeyCache).forEach((cacheKey) => {
        delete signingKeyCache[cacheKey];
    });
};
const hmac = (ctor, secret, data) => {
    const hash = new ctor(secret);
    hash.update(toUint8Array(data));
    return hash.digest();
};