I have got a certificate containing those 4 files and I want to import this certificate to aws,First I converted the key using this command
openssl rsa -in FILENAME.key -out FILENAME.key.rsa
And then I copy past the content of the cer file and the key to aws but it shows this error
Provided certificate is not a valid self signed. Please provide either a valid self-signed certificate or certificate chain.
Solved by adding this (the p7b file)
-----BEGIN CERTIFICATE-----
[certificate chain data]
-----END CERTIFICATE----
and then
openssl pkcs7 -in cert.p7b -print_certs -out out.certs