Code Explainers

Code explainers tagged #hmac

ruby 
require "openssl"
require "base32"
 
class TOTP

How TOTP one-time codes work in Ruby

hmac authentication totp
Intermediate 7 steps
typescript 
import {
  createParamDecorator,
  ExecutionContext,
  UnauthorizedException,

A signed-cookie param decorator in NestJS

custom-decorators hmac timing-safe-comparison
Advanced 8 steps
rust 
use hmac::{Hmac, Mac};
use sha2::Sha256;
use subtle::ConstantTimeEq;
 

HMAC signing and constant-time verify in Rust

hmac cryptography constant-time
Intermediate 7 steps
go 
package middleware
 
import (
	"crypto/hmac"

Verifying signed URLs with Gin middleware

hmac middleware authentication
Intermediate 8 steps
rust 
use axum::{
    extract::{FromRequestParts, Path, Query},
    http::{request::Parts, StatusCode},
    response::{IntoResponse, Redirect},

Signed download links as an Axum extractor

hmac custom-extractor authentication
Advanced 9 steps
go 
package handlers
 
type WebhookEvent struct {
	ID   string          `json:"id"`

Verifying and processing webhooks in Gin

webhooks hmac idempotency
Intermediate 9 steps
php 
<?php
 
final class RememberMeCookie
{

Signed remember-me cookies in PHP

authentication hmac cookies
Intermediate 8 steps
ruby 
class WebhookSignatureConstraint
  def initialize(provider)
    @provider = provider
  end

Verifying webhook signatures with Rails routing constraints

routing constraints hmac webhooks
Advanced 7 steps
java 
public final class HmacJwt {
 
    private static final ObjectMapper MAPPER = new ObjectMapper();
    private static final Base64.Encoder ENCODER = Base64.getUrlEncoder().withoutPadding();

How HMAC-signed JWTs are created and verified

jwt hmac cryptography
Intermediate 9 steps
python 
import base64
import hashlib
import hmac
import os

How TOTP two-factor codes work

totp hmac authentication
Intermediate 7 steps
ruby 
require "openssl"
require "json"
require "base64"
 

Building signed session tokens in Ruby

hmac authentication cryptography
Intermediate 8 steps
go 
package security
 
import (
	"crypto/hmac"

Signing and verifying payloads with HMAC in Go

hmac cryptography authentication
Intermediate 5 steps
php 
<?php
 
namespace App\Http\Middleware;
 

Verifying GitHub webhook signatures in Laravel

middleware hmac webhooks
Intermediate 5 steps
python 
import base64
import hashlib
import hmac
import json

Building signed expiring tokens with HMAC

hmac authentication base64
Intermediate 7 steps
php 
<?php
 
namespace App\Support;
 

How TOTP codes are generated in PHP

totp hmac two-factor-auth
Advanced 7 steps
php 
<?php
 
namespace App\Http\Middleware;
 

Verifying webhook signatures in Laravel

hmac middleware webhooks
Intermediate 7 steps
ruby 
require "openssl"
require "base64"
 
module WebhookSignature

Signing and verifying webhooks in Ruby

hmac cryptography webhooks
Intermediate 7 steps
php 
<?php
 
namespace App\Services;
 

Building signed, expiring download URLs in PHP in Laravel

hmac url-signing authentication
Intermediate 7 steps