certify

🔒 Certify

Certify is an easy-to-use certificate manager and can be used as an alternative to OpenSSL. With Certify you can create your own private CA (Certificate Authority) and issue certificates with your own CA.

Feature

• Create a CA and intermediate CA
• Issue certificate with custom common name, ip san, dns san, expiry date, and extended key usage
• Show certificate information from file or remote host
• Export certificate to PKCS12 format
• Verify private key matches with certificate
• Revoke certificate

Installation

Download in the release page

Usage

             _   _ ___     
 ___ ___ ___| |_|_|  _|_ _ 
|  _| -_|  _|  _| |  _| | |
|___|___|_| |_| |_|_| |_  |
                      |___| Certify v1.x

Usage of certify:  
certify [flag] [ip-or-dns-san] [cn:default certify] [eku:default serverAuth,clientAuth] [expiry:default 8766h s,m,h,d]

$ certify server.local 172.17.0.1 cn:web-server eku:serverAuth expiry:1d
$ certify -init cn:web-server o:nothinux crl-nextupdate:100d

Flags:
  -init
	Initialize new root CA Certificate and Key
  -intermediate
	Generate intermediate certificate
  -read  <filename>
	Read certificate information from file or stdin
  -read-crl <filename>
	Read certificate revocation list from file or stdin
  -connect  <host:443> <tlsver:1.2> <insecure> <with-ca:ca-path>
	Show certificate information from remote host, use tlsver to set spesific tls version
  -export-p12  <cert> <private-key> <ca-cert>
	Generate client.p12 pem file containing certificate, private key and ca certificate
  -match  <private-key> <cert>
	Verify cert-key.pem and cert.pem has same public key
  -interactive
	Run certify interactively
  -revoke <certificate> <crl-file> <crl-nextupdate:10d(optional)>
	Revoke certificate, the certificate will be added to CRL
  -verify-crl <certificate> <crl-file>
	Check if the certificate was revoked
  -version
	print certify version

Create Certificate with CN nothinux and expiry 30 days

# create CA
$ certify -init cn:nothinux o:nothinux

# create Certificate
$ certify cn:nothinux expiry:30d

Create Certificate interactively

$ certify -interactive

Read Certificate

$ certify -read ca-cert.pem
or
$ cat ca-cert.pem | certify -read

Use Certify as library

You can also use certify as library for your Go application

Installation

go get github.com/nothinux/certify

Documentation

see pkg.go.dev

Example

Create Private Key and CA Certificates

package main

import (
	"crypto/x509/pkix"
	"log"
	"os"
	"time"

	"github.com/nothinux/certify"
)

func main() {
	p, err := certify.GetPrivateKey()
	if err != nil {
		log.Fatal(err)
	}

	if err := os.WriteFile("CA-key.pem", []byte(p.String()), 0640); err != nil {
		log.Fatal(err)
	}

	// create ca
	template := certify.Certificate{
		Subject: pkix.Name{
			Organization: []string{"certify"},
		},
		NotBefore: time.Now(),
		NotAfter:  time.Now().Add(8766 * time.Hour),
		IsCA:      true,
	}

	caCert, err := template.GetCertificate(p.PrivateKey)
	if err != nil {
		log.Fatal(err)
	}

	if err := os.WriteFile("CA-cert.pem", []byte(caCert.String()), 0640); err != nil {
		log.Fatal(err)
	}

}

License

MIT