Final answer:
To get a certificate chain from a .crt file, you can use the OpenSSL command in the terminal or command prompt.
Step-by-step explanation:
To get a certificate chain from a .crt file, you can use the OpenSSL command in the terminal or command prompt. Here is an example command:
openssl crl2pkcs7 -nocrl -certfile certificate.crt | openssl pkcs7 -print
This command converts the .crt file to PKCS#7 format and then prints the certificate chain. The certificate chain includes the root certificate, intermediate certificates, and the end-entity certificate. This information is useful for verifying the authenticity of the end-entity certificate.