missing root certificate, SMIME spanish government

[Wolfgang Traylor]

> However given a cer file, how can I find out its fingerprint?
This command will show you the details of the certificates from the website[1]
you mentioned including its fingerprint:

openssl x509 -noout -text -fingerprint -inform DER -in downloaded_key_file.cer

Or you import the key with `gpgsm --import file.cer` and look in the list of
`gpgsm --list-keys`.

[1] https://www.sede.fnmt.gob.es/descargas/certificados-raiz-de-la-fnmt
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