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.
- 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.
Copyright (c) 2013, Ryan Rogers
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