Loads certificate information from a SAML metadata URL or encoded string and returns expiration date
usage: check.py [-h] {cmdline,url} data
- Load from SAML metadata URL
python check.py url "https://example.com/saml/metadata"
- Paste X.509 cert
python check.py cmdline "MIIGbzCCBVegAwIBAgIRAJphmAXC6GR8omPixrWd8QowDQYJKoZIhvcNAQELBQAwgY8xCzAJBgNV....=="