Tag: https

Setting up (comodo) ssl for your website on aws

We have bought our ssl from comodo from name.com as we got a better deal there. After sending them our signed key. comodo sent us following files via email, against my private key. Now I would blog about how I setted the whole thing up on AWS.

First of all, before purchasing I had to send them a key which I had generated using OpenSSL using following command:

openssl req \
       -newkey rsa:2048 -nodes -keyout domain.key \
       -out domain.csr

Which was pretty easy. And as we had bought Comodo Essential SSL Wildcard so we could buy it without verifying our company, in fairly easy in less than 5 min.

After our successful purchase comodo sent us following files as zip in my email:
domain_com.crt
COMODORSAAddTrustCA.crt
domain_com.crt os our Primary Certificate, COMODORSAAddTrustCA.crt is our Intermediate Certificate, and AddTrustExternalCAROOT.crt is the The Root Certificate.

Now it gets a little bit tricky because currently our certificates are in .crt format, but we want it to be in *.pem format. So we would need to convert them in *.pem.

openssl x509 -in ./AddTrustExternalCARoot.crt -outform pem -out ./pem/AddTrustExternalCARoot.pem
openssl x509 -in ./COMODORSAAddTrustCA.crt -outform pem -out ./pem/COMODORSAAddTrustCA.pem
openssl x509 -in ./COMODORSADomainValidationSecureServerCA.crt -outform pem -out ./pem/COMODORSADomainValidationSecureServerCA.pem
openssl x509 -in ./domain_com.crt -outform pem -out ./domain.pem

We would also need to keys that was used to create these certificates by comodo.

openssl rsa -in ./domain.key -outform PEM -out domain.key.pem

Lets create the chain first:

$ cat ./COMODORSADomainValidationSecureServerCA.pem > ./CAChain.pem
$ cat ./COMODORSAAddTrustCA.pem >> ./CAChain.pem
$ cat ./AddTrustExternalCARoot.pem >> ./CAChain.pem

Now you need to login to your aws console and search for ACM (Amazon Certificate Manager). and if it is your first time you need to click on Provision certificates.

It is time to import your certificate to ACM. At the form where it says Certificate body* please paste domain.pem and domain.key.pem and at Certificate chain paste CAChain.pem.

So thats it we are done importing.

Now if you have a load balancer you can take advantages of this ssl. If you have an existing load balancer or feel free to create one, where at the place of listener add https instead of http and for certificate choose acm and your domain.

You are good to go.