Unable to set a correct SSL access

[Mat38]

Hi all,

I am currently trying to set monit with SSL ENABLE by using a certified
certificat.
I know nothing in SSL...

My provider give me three files:
        SSLCertificateFile /etc/ssl/certs/domain.tld.crt
        SSLCertificateKeyFile /etc/ssl/private/domain.tld.key
        SSLCertificateChainFile /etc/ssl/certs/GandiXXXSSLCA.pem

I use them for Apache configuration and on all my website, it is working
well.

However, Monit requires a .pem file. I do not know how I can generate it
for make Monit work properly in SSL with the following configuration:

  SET HTTPD PORT 2812 and
      SSL ENABLE
      PEMFILE  /var/certs/monit.pem
      allow user:pwd

Someone can help me ?

Thank you in advance.
Regards,
Mathias.