pub fn expiry(cert: &Path) -> Result<String, String>Expand description
The expiry date openssl reads out of a certificate.
openssl x509, not a parser: the workspace already requires
openssl for everything key-shaped and adding an X.509 crate to read
one field would be a supply-chain edge bought for a date.
ยงErrors
Returns a description when the file cannot be read or is not a certificate.