I am trying to verify a signature for a file:
openssl dgst -verify cert.pem -signature file.sha1 file.data
- all it says is "unable to load key file"
The certificate says:
openssl verify cert.pem cert.pem: /C=.... error 20 at 0 depth lookup:unable to get local issuer certificate
However, I specifically don't care about verifying the certificate, I want only to verify the signature for a given file!