go-check-certs

README

go-check-certs

This is a simple utility written in Go to check SSL certificates for a list of hosts. Each certificate in the host's certificate chain is checked for the following:

• Expiration date. By default, you will be warned if a certificate will expire within 30 days. This can be adjusted with -years=X, -months=X, and/or -days=X.
• Signature algorithm. Some algorithms have already been sunset, others are in the process of being sunset. This can be spammy, so you can disable the check with -check-sig-alg=false.

Usage looks something like:

./go-check-certs -hosts="./path/to/file/with/hosts"

The hosts file is simply a single hostname:port per line. Empty lines or lines that start with # are ignored.

Current limitations:

• This uses the host's root CA set to check the validity of certificates. This means that it is not able to validate things like self-signed certificates.
• A certificate must be valid for it to be checked.

License:

Copyright (c) 2013, Ryan Rogers
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met: 

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer. 
2. 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. 

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