Overview

File certgen-1.4.0.obscpio of Package certgen

07070100000000000081A400000000000000000000000168749A1E00000268000000000000000000000000000000000000001E00000000certgen-1.4.0/.goreleaser.ymlversion: 2

before:
  hooks:
    - go mod tidy -compat=1.24

builds:
  -
    goos:
      - darwin
      - linux
      - freebsd
      - windows

    goarch:
      - amd64
      - arm64
      - ppc64le
      - s390x

    flags:
      - -trimpath
      - --tags=kqueue

    ldflags:
      - -s -w -X main.version={{.Tag}}

    env:
      - CGO_ENABLED=0

archives:
  -
    name_template: "{{ .ProjectName }}-{{ .Os }}-{{ .Arch }}"
    format: binary

changelog:
  sort: asc

nfpms:
  -
    maintainer: "MinIO Developers <dev@min.io>"
    homepage: https://github.com/minio/certgen
    formats:
      - deb
      - rpm
07070100000001000081A400000000000000000000000168749A1E000005C7000000000000000000000000000000000000001600000000certgen-1.4.0/LICENSECopyright (c) 2009 The Go Authors. All rights reserved.

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modification, are permitted provided that the following conditions are
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   * Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
   * Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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07070100000002000081A400000000000000000000000168749A1E000008B5000000000000000000000000000000000000001800000000certgen-1.4.0/README.md# certgen

`certgen` is a simple tool to generate self-signed certificates, and provides SAN certificates with DNS and IP entries.

## Install

<details open="true"><summary><b><a name="binary-releases">Binary Releases</a></b></summary>

| OS       | ARCH    | Binary                                                                                               |
|:--------:|:-------:|:----------------------------------------------------------------------------------------------------:|
| Linux    | amd64   | [linux-amd64](https://github.com/minio/certgen/releases/latest/download/certgen-linux-amd64)         |
| Linux    | arm64   | [linux-arm64](https://github.com/minio/certgen/releases/latest/download/certgen-linux-arm64)         |
| Linux    | ppc64le | [linux-ppc64le](https://github.com/minio/certgen/releases/latest/download/certgen-linux-ppc64le)     |
| Linux    | s390x   | [linux-s390x](https://github.com/minio/certgen/releases/latest/download/certgen-linux-s390x)         |
| Apple M1 | arm64   | [darwin-arm64](https://github.com/minio/certgen/releases/latest/download/certgen-darwin-arm64)       |
| Apple    | amd64   | [darwin-amd64](https://github.com/minio/certgen/releases/latest/download/certgen-darwin-amd64)       |
| Windows  | amd64   | [windows-amd64](https://github.com/minio/certgen/releases/latest/download/certgen-windows-amd64.exe) |
| Windows  | arm64   | [windows-amd64](https://github.com/minio/certgen/releases/latest/download/certgen-windows-arm64.exe) |
| FreeBSD  | amd64   | [freebsd-amd64](https://github.com/minio/certgen/releases/latest/download/certgen-freebsd-amd64)     |
| FreeBSD  | arm64   | [freebsd-amd64](https://github.com/minio/certgen/releases/latest/download/certgen-freebsd-arm64)     |

Download [`certgen`](https://github.com/minio/certgen/releases/latest) for your specific operating system and platform.

## Example (server)

```sh
certgen -host "127.0.0.1,localhost"

Created a new certificate 'public.crt', 'private.key' valid for the following names 📜
 - "127.0.0.1"
 - "localhost"
```

## Example (client)

```sh
certgen -client -host "localhost"

Created a new certificate 'client.crt', 'client.key' valid for the following names 📜
 - "localhost"
```
07070100000003000081A400000000000000000000000168749A1E00001BA9000000000000000000000000000000000000001900000000certgen-1.4.0/certgen.go// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Generate a self-signed X.509 certificate for a TLS server. Outputs to
// 'public.crt' and 'private.key' and will overwrite existing files.

package main

import (
	"crypto/ecdsa"
	"crypto/ed25519"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/pem"
	"flag"
	"fmt"
	"log"
	"math/big"
	"net"
	"net/mail"
	"net/url"
	"os"
	"os/user"
	"regexp"
	"strings"
	"time"
)

var version = "(dev)"

var (
	host       = flag.String("host", "", "Comma-separated hostnames and IPs to generate a certificate for")
	ecdsaCurve = flag.String("ecdsa-curve", "P256", "ECDSA curve to use to generate a key. Valid values are P224, P256 (recommended), P384, P521")
	ed25519Key = flag.Bool("ed25519", false, "Generate an Ed25519 key")
	orgName    = flag.String("org-name", "Certgen Development", "Organization name used when generating the certs")
	commonName = flag.String("common-name", "", "Common name for client cert")
	ouName     = flag.String("ou-name", "", "Organizational unit name for cert. Defaults to username@hostname")
	isNoCA     = flag.Bool("no-ca", false, "whether this cert should not be its own Certificate Authority")
	isClient   = flag.Bool("client", false, "whether this cert is a client certificate")
	validFrom  = flag.String("start-date", "", "Creation date formatted as Jan 1 15:04:05 2011")
	validFor   = flag.Duration("duration", 365*24*time.Hour, "Duration that certificate is valid for")
)

func publicKey(priv interface{}) interface{} {
	switch k := priv.(type) {
	case *ecdsa.PrivateKey:
		return &k.PublicKey
	case ed25519.PrivateKey:
		return k.Public().(ed25519.PublicKey)
	default:
		return nil
	}
}

var organizationalUnit string

func init() {
	if *ouName == "" {
		u, err := user.Current()
		if err == nil {
			organizationalUnit = u.Username + "@"
		}
		if h, err := os.Hostname(); err == nil {
			organizationalUnit += h
		}
		if err == nil && u.Name != "" && u.Name != u.Username {
			organizationalUnit += " (" + u.Name + ")"
		}
	} else {
		organizationalUnit = *ouName
	}
}

func main() {
	flag.Parse()

	if len(*host) == 0 {
		log.Fatalf("Missing required --host parameter")
	}

	var priv interface{}
	var err error
	switch *ecdsaCurve {
	case "":
		if *ed25519Key {
			_, priv, err = ed25519.GenerateKey(rand.Reader)
		}
	case "P224":
		priv, err = ecdsa.GenerateKey(elliptic.P224(), rand.Reader)
	case "P256":
		priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
	case "P384":
		priv, err = ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
	case "P521":
		priv, err = ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
	default:
		log.Fatalf("Unrecognized elliptic curve: %q", *ecdsaCurve)
	}
	if err != nil {
		log.Fatalf("Failed to generate private key: %v", err)
	}

	// ECDSA, ED25519 subject keys should have the DigitalSignature
	// KeyUsage bits set in the x509.Certificate template
	keyUsage := x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature

	var notBefore time.Time
	if len(*validFrom) == 0 {
		notBefore = time.Now()
	} else {
		notBefore, err = time.Parse("Jan 2 15:04:05 2006", *validFrom)
		if err != nil {
			log.Fatalf("Failed to parse creation date: %v", err)
		}
	}

	notAfter := notBefore.Add(*validFor)

	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
	if err != nil {
		log.Fatalf("Failed to generate serial number: %v", err)
	}

	template := x509.Certificate{
		SerialNumber: serialNumber,
		Subject: pkix.Name{
			Organization:       []string{*orgName},
			OrganizationalUnit: []string{organizationalUnit},
		},
		NotBefore: notBefore,
		NotAfter:  notAfter,

		KeyUsage:              keyUsage,
		BasicConstraintsValid: true,
	}

	if *isClient {
		if *commonName != "" {
			template.Subject.CommonName = *commonName
		}
	}

	hosts := strings.Split(*host, ",")
	for _, h := range hosts {
		h = strings.TrimSpace(h)
		if h == "" {
			continue
		}
		if ip := net.ParseIP(h); ip != nil {
			template.IPAddresses = append(template.IPAddresses, ip)
		} else if email, err := mail.ParseAddress(h); err == nil && email.Address == h {
			template.EmailAddresses = append(template.EmailAddresses, h)
		} else if uriName, err := url.Parse(h); err == nil && uriName.Scheme != "" && uriName.Host != "" {
			template.URIs = append(template.URIs, uriName)
		} else {
			template.DNSNames = append(template.DNSNames, h)
		}
	}

	if len(template.IPAddresses) > 0 || len(template.DNSNames) > 0 || len(template.URIs) > 0 {
		template.ExtKeyUsage = append(template.ExtKeyUsage, x509.ExtKeyUsageServerAuth)
	}
	if len(template.EmailAddresses) > 0 {
		template.ExtKeyUsage = append(template.ExtKeyUsage, x509.ExtKeyUsageEmailProtection)
	}

	if *isClient {
		template.ExtKeyUsage = append(template.ExtKeyUsage, x509.ExtKeyUsageClientAuth)
	} else if !*isNoCA {
		template.IsCA = true
		template.KeyUsage |= x509.KeyUsageCertSign
	}

	pkey := publicKey(priv)
	if pkey == nil {
		log.Fatalln("Failed to create certificate: publicKey is nil")
	}

	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, pkey, priv)
	if err != nil {
		log.Fatalf("Failed to create certificate: %v", err)
	}

	certName := "public.crt"
	if *isClient {
		certName = "client.crt"
	}
	certOut, err := os.Create(certName)
	if err != nil {
		log.Fatalf("Failed to open %s for writing: %v", certName, err)
	}
	if err := pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
		log.Fatalf("Failed to write data to %s: %v", certName, err)
	}
	if err := certOut.Close(); err != nil {
		log.Fatalf("Error closing %s: %v", certName, err)
	}

	certKey := "private.key"
	if *isClient {
		certKey = "client.key"
	}

	keyOut, err := os.OpenFile(certKey, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
	if err != nil {
		log.Fatalf("Failed to open %s for writing: %v", certKey, err)
	}
	privBytes, err := x509.MarshalPKCS8PrivateKey(priv)
	if err != nil {
		log.Fatalf("Unable to marshal %s: %v", certKey, err)
	}
	if err := pem.Encode(keyOut, &pem.Block{Type: "PRIVATE KEY", Bytes: privBytes}); err != nil {
		log.Fatalf("Failed to write data to %s: %v", certKey, err)
	}
	if err := keyOut.Close(); err != nil {
		log.Fatalf("Error closing %s: %v", certKey, err)
	}

	secondLvlWildcardRegexp := regexp.MustCompile(`(?i)^\*\.[0-9a-z_-]+$`)
	fmt.Printf("Created a new certificate '%v', '%v' valid for the following names 📜\n", certName, certKey)
	for _, h := range hosts {
		h = strings.TrimSpace(h)
		if h == "" {
			continue
		}
		fmt.Printf(" - %q\n", h)
		if secondLvlWildcardRegexp.MatchString(h) {
			fmt.Printf("   Warning: many browsers don't support second-level wildcards like %q ⚠ī¸\n", h)
		}
	}

	for _, h := range hosts {
		h = strings.TrimSpace(h)
		if h == "" {
			continue
		}
		if strings.HasPrefix(h, "*.") {
			fmt.Printf("\nReminder: X.509 wildcards only go one level deep, so this won't match a.b.%s ℹī¸\n", h[2:])
			break
		}
	}
}
07070100000004000081A400000000000000000000000168749A1E0000003D000000000000000000000000000000000000001500000000certgen-1.4.0/go.modmodule github.com/minio/certgen

go 1.24

toolchain go1.24.5
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!24 blocks
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