Cretificate Update Test

[Mushy]

Hello,

I have recieved three certificates root, intermediate and the server certificate to apply in the Linux server.

How do i verify the validity/correctness of the existing certificate, before applying new certificates?

Thanks,

Mushy

[gwootton · Accepted solution]

You can use openssl commands to check a certificate against a key and against a certificate authority.

For example:

#Check if key matches certificate, these modulus would match.
openssl rsa -noout -modulus -in server.key
openssl x509 -noout -modulus -in server.crt

# Check if a certificate is valid for a given CA/Intermediate.
openssl verify -CAfile root.crt -untrusted intermediate.crt server.crt

[Mushy]

@gwootton  Thanks for the guidance!