https-cert-info

A command-line tool outputs a summary of the HTTPS certificate (or certificate chain) for a server

Installation

Cargo

shell cargo install https-cert-info

Manual

Download the binary from the latest release, and place it somewhere on $PATH.

Examples

```shell $ https-cert-info google.com Connecting to google.com:443 (took 122ms) Performing handshake for google.com (took 458ms)

Subject .google.com (C=US, ST=California, L=Mountain View, O=Google LLC, CN=.google.com) Issued by GTS CA 1O1 (C=US, O=Google Trust Services, CN=GTS CA 1O1) Valid from 28 days ago (2020-08-26T08:08:49Z) Expires in 55 days (2020-11-18T08:08:49Z)

Subject Alternative Names: *.google.com *.android.com *.appengine.google.com *.bdn.dev *.cloud.google.com *.crowdsource.google.com *.datacompute.google.com *.g.co *.gcp.gvt2.com *.gcpcdn.gvt1.com and 63 more.

using SNI to request a different domain

$ https-cert-info google.com -d www.google.com Connecting to google.com:443 (took 17ms) Performing handshake for www.google.com (took 461ms)

Subject www.google.com (C=US, ST=California, L=Mountain View, O=Google LLC, CN=www.google.com) Issued by GTS CA 1O1 (C=US, O=Google Trust Services, CN=GTS CA 1O1) Valid from 28 days ago (2020-08-26T08:14:23Z) Expires in 55 days (2020-11-18T08:14:23Z)

Subject Alternative Names: www.google.com ```

License

MIT OR Apache-2.0