HTTPS with PKCS12 TLS Example

April 30, 2026 ยท View on GitHub

Github StackBlitz

This project demonstrates how to set up an HTTPS server with PKCS12 TLS in a Go application using the Fiber framework.

Prerequisites

Ensure you have the following installed:

  • Golang
  • Fiber package
  • PKCS12 certificate file (cert.p12)

Setup

  1. Clone the repository:

    git clone https://github.com/gofiber/recipes.git
cd recipes/https-pkcs12-tls

  2. Install dependencies:

    go get

  3. Place your PKCS12 certificate file (server.p12) in the security/ directory.

  4. Optionally set the PKCS12 password via environment variable (defaults to changeit):

    export PKCS12_PASSWORD=yourpassword

Running the Application

  1. Start the application:

    go run main.go

  2. Access the application at https://localhost:443.

Example

Here is an example of how to set up an HTTPS server with PKCS12 TLS in a Fiber application:

package main

import (
    "crypto"
    "crypto/tls"
    "log"
    "os"

    "github.com/gofiber/fiber/v3"
    "golang.org/x/crypto/pkcs12"
)

func main() {
    path := "./security/server.p12"
    password := os.Getenv("PKCS12_PASSWORD")
    if password == "" {
        password = "changeit"
    }

    // Read and decode PKCS12 file
    pkcs12Data, err := os.ReadFile(path)
    if err != nil {
        log.Fatal(err)
    }

    key, cert, err := pkcs12.Decode(pkcs12Data, password)
    if err != nil {
        log.Fatal(err)
    }

    tlsCert := tls.Certificate{
        Certificate: [][]byte{cert.Raw},
        PrivateKey:  key.(crypto.PrivateKey),
        Leaf:        cert,
    }

    config := &tls.Config{Certificates: []tls.Certificate{tlsCert}}

    app := fiber.New()
    app.Get("/", func(c fiber.Ctx) error {
        return c.SendString("This page is being served over TLS using a PKCS12 store type!")
    })

    ln, err := tls.Listen("tcp", ":443", config)
    if err != nil {
        log.Fatal(err)
    }

    log.Fatal(app.Listener(ln))
}

References