Verify CRL signature against its root CA
问题 I'm currently trying to verify that the CRL I download from a URL is a valid file, signed by the corresponding Certificate Authority. With OpenSSL, you can do this as follows : https://www.openssl.org/docs/manmaster/apps/crl.html Example with the CRL issued from CertEurope : openssl crl -in certeurope_v3.crl -inform der -CAfile certeurope_advanced_v3.cer (The CRL file and the CA file are downloaded from this URL : https://www.certeurope.fr/chaine-de-confiance ) CA file : https://www