The private key is a separate file that’s used in the encryption/decryption of data sent between your server and the connecting clients. A private key is created by you—the certificate owner—when you request your certificate with a Certificate Signing Request (CSR).
- Csr Vs Private Key
- Openssl Generate Key From Csr
- How To Generate Private Key And Csr On Windows To Obtain Ssl Certificate
- Extract Private Key From Csr
- Windows Generate Csr With Private Key
- Windows Generate Private Key And Csr
- Windows Generate Private Key And Csr Program
Introduction
This document describes the procedure to generate certificates which have to be uploaded with every fresh installation of AMP Virtual Private Cloud (VPC). With the introduction of AMP Private Cloud 3.X, hostnames and certificate/key pairs are required for all of the following services:
- Administration Portal
- Authentication (new in Private Cloud 3.X)
- FireAMP Console
- Disposition Server
- Disposition Server - Extended Protocol
- Disposition Update Service
- Firepower Management Center
Here, we will discuss a quick way to generate and upload the required certificates. You may tweak each of the parameters, including the hashing algorithm, key size, and others, as per your organization's policy, and your mechanism of generating these certificates might not match with what is detailed here.
Prerequisites
Components Used
Cisco recommends that you have knowledge of these topics:
- Windows Server 2008 onwards
- AMP Private Cloud installation
- Public Key Infrastructure
Requirements
The information in this document is based on these software and hardware versions:
- Windows Server 2008
- CentOS 7
- AMP Virtual Private Cloud 3.0.2
Warning: The procedure mentioned below can vary as per your CA server configuration. It is expected that the CA server of your choice is already provisioned and the configuration of the same has been completed. The following technote just describes an example of generating the certificates and Cisco TAC will not be involved in troubleshooting issues related to certificate generation and/or CA server issues of any kind.
Csr Vs Private Key
Generate Certificates on Window Server
Ensure that the following roles are installed and configured on your Windows Server.
- Active Directory Certificate Services
- Certification Authority
- Certification Authority Web Enrollment
- Online Responder
- Certificate Enrollment Web Service
- Certificate Enrollment Policy Web Service
- Active Directory Domain Services
- DNS Servers
- Web Server (IIS)
Generate a Certificate Signing Request (CSR)
Step 1. Navigate to MMC console, and add the Certificates snap-in for your computer account as shown in the image here.
Step 2. Drill down Certificates (Local Computer) > Personal > Certificates.
Step 3. Right click on the empty space and select All Tasks > Advanced Operations > Create Custom Request
Step 4. Click Next at the Enrollment window.
Step 5. Select your certificate enrollment policy and click Next.
Step 6. Choose the template as Web Server and click Next.
Step 7. If your 'Web Server' template has been configured correctly and is available for enrollment, you will see the status as 'Available' here. Click 'Details' to expand click on Properties.
Step 8. At a minimum, add the CN and DNS attributes. The rest of the attributes can be added as per your security requirements.
Step 9. Optionally, give a Friendly Name under the General tab.
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Step 10. Click on the PrivateKey tab and ensure that you're enabling Make private key exportable under the Key Options section.
Step 11. Finally, click on OK. This should lead you to the Certificate Enrollment dialog from where you can click on Next.
Step 12. Browse to a location to save the .req file which will be submitted to the CA server for signing.
Submitting the CSR to the CA and generating the certificate
Openssl Generate Key From Csr
Step 1. Navigate to your MS AD Certificate Services Web Page as below and click 'Request a Certificate'
Step 2. Click on the advanced certificate request link.
Step 3. Click on Submit a certificate request by using a base-64-encoded CMC or PKCS #10 file, or submit a renewal request by using a base-64-encoded PKCS #7 file.
Step 4. Open the contents of the previously saved .req file (CSR) via Notepad. Copy the contents and paste it here. Ensure that the Certificate Template is selected as Web Server
Step 5. Finally, click on Submit.
Step 6. At this point, you should be able to Download the certificate as shown in the image here.
Exporting the Private Key and converting to PEM format
Step 1. Install the certificate into your Certificate Store by opening the .cer file and clicking on Install Certificate.
Step 2. Navigate to the MMC snap-in that was selected earlier.
Step 3. Navigate to the store where the certificate was installed.
Step 4. Right click the correct certificate, select All Tasks > Export.
Step 5. At the Certificate Export Wizard, confirm to export the private key as shown in the image.
Step 6. Enter a password and click Next to save the private key on your disk.
Step 7. This will save the private key in .PFX format, however, this needs to be converted to .PEM format to use this with AMP VPC.
Step 8. Install OpenSSL libraries from here:https://wiki.openssl.org/index.php/Binaries
Step 9. Open a command prompt window and change to the directory where you installed OpenSSL.
Step 10. Run the following command to extract the private key and save it to a new file: (If your PFX file is not in the same path as where the OpenSSL library is stored, you will have to specify the exact path along with the filename)
Step 11. Now run the following command to also extract the public cert and save it to a new file:
Generate Certificate on Linux Server
Ensure that the Linux server that you're trying to generate the required certificates has the OpenSSL libraries installed. Verifying if this and the procedure listed below will vary from the Linux distribution that you're running. This portion has been documented, as done on a CentOS 7 server.
Generate Self Signed RootCA
How To Generate Private Key And Csr On Windows To Obtain Ssl Certificate
Step 1. Generate the Private Key for Root CA certificate
Step 2. Generate the CA certificate
Generate a certificate for each service
Create the certificate for Authentication, Console, Disposition, Disposition-Extended, Update server, Firepower Management Center(FMC) service as per the DNS name entry. You need to repeat below certificate generate process for each service (Authentication, Console etc.)
Generate Private key
Replace the <example.key> with actual certificate key such as Auth-Cert.key.
Generate CSR
Replace the <example.csr> with actual certificate CSR such as Auth-Cert.csr
Generate Certificate
Replace <example.csr>, <example.crt> with actual certificate CSR and certificate name
Extract Private Key From Csr
Adding The Certificates to AMP VPC
Windows Generate Csr With Private Key
Step 1. Once the certificates are generated from any of the above methods, upload the corresponding certificate for each of the services. If they have been generated correctly, all the check marks are enabled as seen in the image here.
Verify
There is currently no verification procedure available for this configuration.
Windows Generate Private Key And Csr
Troubleshoot
Windows Generate Private Key And Csr Program
There is currently no specific troubleshooting information available for this configuration.