I have 4 certificate files like this:
1.certum_certificate.crt
2.certum_certificate.pem
3.Intermediate_CA2.cer
4.Intermediate_CA.cer
5.Root_CA.cer
I put these files content by this order in a bundle file and I figured out that my SSL chain is incomplete.
How should I arrange them in bundle file?
Just concatenate the three parts into a single file like this (fullchain.pem) :
-----BEGIN CERTIFICATE-----
MIIFKTCCBBGgAwIBAgISA/UUyBjJ71fucZuvpiLsdfsfsdfsdfd
...
hoFWWJt3/SeBKn+ci03RRvZsdfdsfsdfw=
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIFFjCCAv6gAwIBAgIRAJErCErPDBinsdfsfsdfsdfdsfsdfsd
....
nLRbwHqsdqD7hHwg==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIFYDCCBsdfSDFSDFVSDVzfsdffvqdsfgsT664ScbvsfGDGSDV
...
Dfvp7OOGAN6dEOM4+SDFSDZET+DFGDFQSD45Bddfghqsqf6Bsff
-----END CERTIFICATE-----
The order must be backwards. The sender's certificate must come first in the list. Each following certificate must directly certify the one preceding it :
Original issuer —> Intermediate issuer 1 —> Final Root issuer which is a root certificate authority and can be trusted.
It's possible to have several intermediates : ...—> Intermediate issuer 1 —> Intermediate issuer 2 —>...