https://github.com/earthboundkid/certinfo

Get information about the certificate used at a domain
https://github.com/earthboundkid/certinfo

certificate certinfo cli command-line-tool go golang json

Last synced: 4 months ago
JSON representation

Get information about the certificate used at a domain

• Host: GitHub
• URL: https://github.com/earthboundkid/certinfo
• Owner: earthboundkid
• License: mit
• Created: 2018-10-05T19:26:26.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2021-04-19T14:12:12.000Z (almost 4 years ago)
• Last Synced: 2024-06-19T00:32:47.302Z (7 months ago)
• Topics: certificate, certinfo, cli, command-line-tool, go, golang, json
• Language: Go
• Homepage:
• Size: 14.6 KB
• Stars: 34
• Watchers: 3
• Forks: 6
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# certinfo [![GoDoc](https://godoc.org/github.com/carlmjohnson/certinfo?status.svg)](https://godoc.org/github.com/carlmjohnson/certinfo) [![Go Report Card](https://goreportcard.com/badge/github.com/carlmjohnson/certinfo)](https://goreportcard.com/report/github.com/carlmjohnson/certinfo)

Get information about the certificate used at a domain

## Installation

First install [Go](http://golang.org).

If you just want to install the binary to your current directory and don't care about the source code, run

```bash

GOBIN="$(pwd)" go install github.com/carlmjohnson/certinfo@latest

```

## Screenshots

```

$ certinfo --help

Usage of certinfo

    certinfo [options] ...

Options:

  -expires duration

        error if cert expiration time is less than this; use 0 to disable (default 168h0m0s)

  -output mode

        output mode: text, json, or none (default text)

  -port int

        Port to look for TLS certificates on (default 443)

  -timeout duration

        time out on TCP dialing (default 5s)

  -verbose

        log connections

$ certinfo example.com

Host: example.com:443

Certs:

    Issuer: DigiCert SHA2 High Assurance Server CA

    Subject: www.example.org

    Not Before: Nov 3, 2015 12:00 AM

    Not After: Nov 28, 2018 12:00 PM

    DNS names: www.example.org example.com example.edu example.net example.org www.example.com www.example.edu www.example.net

$ certinfo -output json -verbose example.com

2018/11/04 19:19:15 connecting to example.com:443

[

  {

    "Host": "example.com",

    "Port": 443,

    "Certs": [

      {

        // snip many fields!

      }

    ]

  }

]

$ certinfo -output none -expires 24h example.com

$ certinfo -output none -expires 480h example.com

Problem running certinfo: cert for www.example.org expires too soon: 2018-11-28T12:00:00Z less than 480h0m0s away

```