Openssl Generate Key And Csr In One Command

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There are two possible ways to generate a CSR on a Zimbra mail server: in the Zimbra Admin WebApp, or using the Zimbra command line interface.

Note: Zimbra supports only one CSR and private key file. Generating a new CSR will replace the previous CSR and private key files.

Sep 11, 2018 SSL certificates are verified and issued by a Certificate Authority (CA). You apply by generating a CSR with a key pair on your server that would, ideally, hold the SSL certificate. The CSR contains crucial organization details which the CA verifies. Generate a CSR and key pair locally on your server.

CSR generation in the Zimbra Admin Console

By default the Zimbra Administration web interface can be accessed via the following URL:

https://yourdomain.com:7071

  • The following sections describe how to use OpenSSL to generate a CSR for a single host name. If you want to generate a CSR for multiple host names, we recommend using the Cloud Control Panel or the MyRackspace Portal. Install OpenSSL. Check whether OpenSSL is installed by using the following command: CentOS® and Red Hat® Enterprise Linux.
  • Jan 10, 2018  Create a CSR from existing private key. Openssl req -new -key example.key -out example.csr -digest Create a CSR and a private key without a pass phrase in a single command: openssl req -nodes -newkey rsa:bits -keyout example.key -out example.csr. Provide CSR subject info on a command line, rather than through interactive prompt.
  • Open a terminal and browse to a folder where you would like to generate your keypair. Windows Users: Navigate to your OpenSSL 'bin' directory and open a command prompt in the same location. Generate a CSR & Private Key: openssl req -out CSR.csr -new -newkey rsa:2048 -keyout privatekey.key.
  • After you’ve successfully generated the private key, it’s time to create your CSR. It will be in PEM format and include details about your company, as well as the public key derived from your private key. Run the following command to generate the CSR: openssl req -new -key yourdomain.key -out yourdomain.csr. OpenSSL will prompt you to.
  • Apr 12, 2020  Lastly I hope the steps from the article to create SAN certificate using openssl generate csr with san command line and openssl sign csr with subject alternative name on Linux was helpful. So, let me know your suggestions and feedback using the comment section.

– yourdomain.com is the Zimbra server hostname, usually assigned during the initial Zimbra setup.

Log into the Administration Console with your admin credentials (the default admin username is admin@yourdomain.com) and follow these steps:

1. Click Configure in the menu list on the left:

2. Click Certificates in the left pane, then click the gear icon on the top right and select Install Certificate:The sims 3 ambitions key generator. /rosetta-stone-key-generator-verision-04.html.

3. Select the needed servername from the drop-down menu and click Next:

4. Select Generate the CSR for the commercial certificate authorizer and click Next:

5. Fill in the details as follows:

Key Length: the length of private and public keys. The current industry standard is 2048- and 4096- bits.

Common Name: the domain that is your server hostname (yourdomain.com). Note: The Use Wildcard Common Name option should be used only if you have a wildcard certificate. In this case, the Common Name should be specified in the following format: *.example.com.

Country Name: the country should be entered as a two-letter ISO 3166-1 -compliant country code.

State/Province: state, province or region; you can enter the city if this field is not applicable for your country.

City: your city.

Organization Name: company name. Note: For Domain Validation certificates, you can simply enter NA as DV certificates do not include company details.

Organization Unit: company department. Note: You can enter NA as this field is not included into certificates.

Subject Alternative Names: SANs may be specified only if you have a multi-domain certificate. For other certificates, please leave this field empty.

6. Once all fields are filled, click Next to continue:

7. Click Download the CSR and save the CSR file. To proceed with the certificate activation in your SSLs.com account, open the CSR file with any text editor (e.g., Notepad or TextEdit) and copy-paste the entire content into the CSR submission box.

Note: Before submitting the CSR in your account, we recommend checking it for possible issues with this online tool.

CSR generation using Zimbra Certificate CLI

You can use the zmcertmgr command line tool to generate a CSR and manage certificates. To do it, you will need SSH access to the server. To use this tool, log in as root for Zimbra version prior to 8.7, or as the zimbra user for versions 8.7 and higher. To switch to the zimbra user, you can run this command (you need to be logged in as root — you can run sudo su to switch to root):

su – zimbra

The default location of the zmcertmgr tool is /opt/zimbra/bin/zmcertmgr. To generate a CSR, run the following command:

/opt/zimbra/bin/zmcertmgr createcsr comm -new -subject “/C=CC/ST=State/L=City/O=Company/OU=NA/CN=yourdomain.com” -noDefaultSubjectAltName

Replace the values as follows:

C = Country, should be specified as a two-letter ISO 3166-1-compliant country code. The list of country codes can be checked here.

ST = State or province; enter the city if not applicable

L = Locality (city)

O = Organization (company name); you can enter NA if this field is not applicable

OU = Organization Unit (company name); you can enter NA if this field is not applicable

CN = Common Name (domain that is your server hostname). If you have a wildcard certificate, enter the Common Name in this format: *.yourdomain.com.

Here is an example command for reference: /opt/zimbra/bin/zmcertmgr createcsr comm -new -subject “/C=US/ST=California/L=Los Angeles/O=MyCompany Inc/OU=NA/CN=server.mydomain.com” -noDefaultSubjectAltName

The output will look like this:

If you need to generate a CSR with multiple domains to activate a multi-domain certificate, you can adjust the command to include SANs in the following way:

/opt/zimbra/bin/zmcertmgr createcsr comm -new -subject “/C=CC/ST=State/L=City/O=Company/OU=NA/CN=yourdomain.com” -subjectAltNames “subdomain.yourdomain.com,otherdomain.com”

Additional domains should be typed in instead of subdomain.yourdomain.comandotherdomain.com.

The CSR will be saved into this file: /opt/zimbra/ssl/zimbra/commercial/commercial.csr.

Openssl Generate Key And Csr In One Command 1

You can open the file with a text editor like Nano, or run this command to print it to console:

cat /opt/zimbra/ssl/zimbra/commercial/commercial.csr

Openssl Generate Key And Csr In One Command Edition

To proceed with certificate activation, copy the entire output including —–BEGIN CERTIFICATE REQUEST—– and —–END CERTIFICATE REQUEST—–, and paste it into the CSR box in your SSLs.com account.

Before submitting the CSR in your account, we recommend checking it for possible issues with this online tool.

Note: The corresponding private key will be saved in the same directory as /opt/zimbra/ssl/zimbra/commercial/commercial.key. The key will be required for certificate installation on Zimbra.

More details on the zmcertmgr tool usage can be found on the Zimbra Wiki.

Deciding on Key Generation Options

When generating a key, you have to decide three things: the key algorithm, the key size, and whether to use a passphrase.

Key Algorithm

For the key algorithm, you need to take into account its compatibility. For this reason, we recommend you use RSA. However, if you have a specific need to use another algorithm (such as ECDSA), you can use that too, but be aware of the compatibility issues you might run into.

Note: This guide only covers generating keys using the RSA algorithm.

Key Size

For the key size, you need to select a bit length of at least 2048 when using RSA and 256 when using ECDSA; these are the smallest key sizes allowed for SSL certificates. Unless you need to use a larger key size, we recommend sticking with 2048 with RSA and 256 with ECDSA.

Openssl Generate Key And Csr In One Command Code

Note: In older versions of OpenSSL, if no key size is specified, the default key size of 512 is used. Any key size lower than 2048 is considered unsecure and should never be used.

Openssl Generate Private Key And Csr

Passphrase

Openssl Generate Key And Csr In One Command

Openssl Generate Key And Csr

For the passphrase, you need to decide whether you want to use one. If used, the private key will be encrypted using the specified encryption method, and it will be impossible to use without the passphrase. Because there are pros and cons with both options, it's important you understand the implications of using or not using a passphrase. In this guide, we will not be using a passphrase in our examples.