certgrabber

Summary

Tool to grab x509 certificate(s) from a remote host. By default the certificates will be returned in PEM format but this can be overrwridden to use DER using the --der flag.

Releases

Updated versions are automatically built and released, please see https://github.com/stavinski/certgrabber/releases.

Usage

Usage: ./certgrabber [Options] host:port

Grabs x509 certificate(s) from a remote host, format will default to PEM. 
  v1.0.0 Mike Nicholls 2022

Options:
  -h, --help    show this help message and exit
  -c, --chain   include the chain
  -d, --der     write in DER format instead of PEM
  -w, --wait    wait timeout for connection in seconds
  -o, --out     output to file instead of stdout

Examples

Wait 5 secs return cert in PEM:

./certgrabber --wait 5 google.com:443

Return cert in DER format and write to google.der:

./certgrabber --der --out google.der google.com:443

Return the full cert chain:

./certgrabber --chain google.com:443