제2의 비엔지니어 인생관을 꿈꾸며

Posted
Filed under Study

Exporting SSL certificates from Windows to Linux

First, you have to get the certificate and key out of Windows in a pfx (PKCS #12) format.

  • Click Start, Run, then type “mmc” and hit enter.
  • In the leftmost menu, choose “Add/Remove Snap In”.
  • Click “Add”, then click “Certificates”, then OK.
  • When the wizard starts, choose “Computer Account”, “Local Computer” and finish out the wizard.
  • Once you’re finished, get back to the MMC and expand the “Certificates” node, then the “Personal” node.
  • Click on the “Certificates” node under “Personal” and find your certificate in the right pane.
  • Right click on the certificate and choose “All Tasks”, then “Export”.
  • When the wizard starts, choose “Yes” for exporting the private key, then select ONLY “Strong Private Key Protection” from the PFX section. You will also need to set a password and specify a location for the PFX file.
  • Once the PFX file has been saved, close out the MMC (don’t save the snap-in if it asks).
  • Get the PFX over to the Linux server somehow.

Once the PFX makes it over to the Linux server, you have to decrypt the PFX into a plaintext PEM file (PFX’s are binary files, and can’t be viewed in a text editor):

openssl pkcs12 -in file.pfx -out file.pem

You will be asked for the password for the PFX (which is the one you set in the Windows wizard). Once you enter that, you will be asked for a new password. This new password is used to encrypt the private key. You cannot proceed until you enter a password that is 4 characters or longer. REMEMBER this password!

When this step is complete, you should have a PEM file that you can read in a text editor. Open the file in a text editor and copy the private key and certificate to different files. Remember to keep the dashed lines intact when you copy the certificates – this is important. There is some additional text above the key, and also between the key and certificate – this text should be ignored and should not be included in the certificate and key files.

Now that you have the key and certificate separated, you need to decrypt the private key (or face the wrath of Apache every time you restart the server). You can decrypt the private key like this:

openssl rsa -in file.key -out file.key

Yes, provide the same file name twice and it will decrypt the key onto itself, keeping everything in one file. OpenSSL will ask for a password to decrypt the key, and this is the password you set when you decrypted the PFX. If you forgot the password, you will need to start over from when you brought it over from the Windows box.

After this entire process, you will have four files, a PFX, PEM, KEY, and CRT. Throw away the PFX and PEM, and you can use the key and certificate files to install into Apache. In case you forget the syntax, here’s what goes in the Apache configuration:

SSLEngine On
SSLCertificateFile /path/to/your/certificate
SSLCertificateKeyFile /path/to/your/privatekey



<VirtualHost *:443>
    ServerName host.domain.com
    SSLEngine On
    SSLProxyEngine On
    ProxyRequests Off
    ProxyPreserveHost On
    SSLCertificateFile /etc/apache2/ssl/domain.pem
    SSLCertificateKeyFile /etc/apache2/ssl/domain-private.key 
    ProxyPass / https://192.168.1.14/
    ProxyPassReverse / https://192.168.1.14/
</VirtualHost>

두가지 방법이 존재합니다. 위 방식은 https 로 받아서 https 로 전달하는 방법이고 아래 내용은 http로 받아서 엔드유저단에는 https 로 전달해주는 방법입니다. 즉 중간에 SSL 브릿지 역할만 하게끔 하는것도 SSL 사이트를 구성할수 있는 방법중 하나입니다. 서버에서 SSL 사이트를 구성하지 않아도 중간 프록시단에서 SSL 로 연결해줄수 있는 방법이기도 합니다.

Listen 443

NameVirtualHost *:443
<VirtualHost *:443>
    SSLEngine On
    # Set the path to SSL certificate
    # Usage: SSLCertificateFile /path/to/cert.pem
    SSLCertificateFile /etc/apache2/ssl/file.pem

    # Servers to proxy the connection, or;
    # List of application servers:
    # Usage:
    # ProxyPass / http://[IP Addr.]:[port]/
    # ProxyPassReverse / http://[IP Addr.]:[port]/
    # Example:
    ProxyPass / http://0.0.0.0:8080/
    ProxyPassReverse / http://0.0.0.0:8080/

    # Or, balance the load:
    # ProxyPass / balancer://balancer_cluster_name

</VirtualHost>

How To Use Apache HTTP Server As Reverse-Proxy Using mod_proxy Extension
2015/07/15 10:16 2015/07/15 10:16