https://github.com/stuarthicks/tls_cert_info

CLI for viewing basic TLS (SSL) Certificate information
https://github.com/stuarthicks/tls_cert_info

cli go golang ssl ssl-certificate ssl-certificate-check tls tls-certificate tls-certificate-checker

Last synced: 4 days ago
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CLI for viewing basic TLS (SSL) Certificate information

• Host: GitHub
• URL: https://github.com/stuarthicks/tls_cert_info
• Owner: stuarthicks
• License: mit
• Created: 2024-05-19T19:41:59.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2024-05-20T08:53:12.000Z (8 months ago)
• Last Synced: 2024-05-20T22:21:09.511Z (8 months ago)
• Topics: cli, go, golang, ssl, ssl-certificate, ssl-certificate-check, tls, tls-certificate, tls-certificate-checker
• Language: Go
• Homepage:
• Size: 5.86 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# tls_cert_info

Print some of the most commonly checked attributes of a TLS certificate without having to remember a very long set of openssl flags. Essentially a replacement for this:

```

❯ openssl s_client \

  -connect github.com:443 \

  -servername github.com \

  -showcerts < /dev/null 2>/dev/null \

  | openssl x509 \

    -noout \

    -issuer \

    -subject \

    -ext subjectAltName \

    -startdate \

    -enddate

issuer=C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo ECC Domain Validation Secure Server CA

subject=CN=github.com

X509v3 Subject Alternative Name:

    DNS:github.com, DNS:www.github.com

notBefore=Mar  7 00:00:00 2024 GMT

notAfter=Mar  7 23:59:59 2025 GMT

```

## Install

Using Homebrew:

    brew install stuarthicks/brews/tls_cert_info

Using Go:

    go install github.com/stuarthicks/tls_cert_info@latest

## Usage

```

❯ tls_cert_info -h

Usage of tls_cert_info:

  -domain string

        Domain to connect to

  -port string

        Override port to connect to (default "443")

  -sni string

        Override SNI domain (default matches -domain)

```

Example:

```

❯ tls_cert_info -domain github.com

Issuer:		Sectigo Limited

Common Name:	github.com

Subject Alternative Names:

	github.com

	www.github.com

Start Date:	2024-03-07

End Date:	2025-03-07

Remaining Days:	292

```