Generate Csr Using Existing Key

What is a CSR? A CSR or Certificate Signing request is a block of encoded text that is given to a Certificate Authority when applying for an SSL Certificate. It is usually generated on the server where the certificate will be installed and contains information that will be included in the certificate such as the organization name, common name (domain name), locality, and country. It also contains the public key that will be included in the certificate. A private key is usually created at the same time that you create the CSR, making a key pair. A CSR is generally encoded using ASN.1 according to the PKCS #10 specification.

Just fill in the details, click Generate, and paste your customized keytool command into your terminal. If you prefer to roll your own keytool commands to generate your CSR, just follow our old instructions below: Create a New Keystore. You will be using the keytool command to create your new key-CSR pairing. How to generate a CSR using an F5 BIG-IP Loadbalancer (version 9) Launch the F5 BIGIP web GUI. Under Local Traffic select 'SSL Certificates' then 'Create.' Under General Properties give your certificate a name (this name will be used in the future to identify this certificate). Using Microsoft IIS to generate CSR and Private Key Last updated; Save as PDF Share. Convert to RSA Private Key Format; You can also use Microsoft IIS to generate a Private Key and CSR. How to generate a CSR in Microsoft IIS 7. Click Start, then Administrative Tools, then Internet Information Services (IIS) Manager. Enter a filename. Generate a CSR from Windows Server using the certificate MMC Certificate MMC access. Run the MMC either from the start menu or via the run tool accessible fom the WIN+R shortcut.

When you generate your CSR code, we will display it on this page instead of the CSR Generator form. The page will refresh, so make sure you scroll down where the CSR Generator was, to see your newly generated CSR code and your Private Key. We will also send you the CSR code and the Private Key by email, for backup purposes.

A certificate authority will use a CSR to create your SSL certificate, but it does not need your private key. You need to keep your private key secret. The certificate created with a particular CSR will only work with the private key that was generated with it. So if you lose the private key, the certificate will no longer work.

What is contained in a CSR?

NameExplanationExamples
Common NameThe fully qualified domain name (FQDN) of your server. This must match exactly what you type in your web browser or you will receive a name mismatch error.

*.google.com
mail.google.com

OrganizationThe legal name of your organization. This should not be abbreviated and should include suffixes such as Inc, Corp, or LLC.Google Inc.
Organizational UnitThe division of your organization handling the certificate.Information Technology
IT Department
City/LocalityThe city where your organization is located.Mountain View
State/County/RegionThe state/region where your organization is located. This shouldn't be abbreviated.California
CountryThe two-letter ISO code for the country where your organization is location.US
GB
Email addressAn email address used to contact your organization.webmaster@google.com
Public KeyThe public key that will go into the certificate.The public key is created automatically

What does a CSR look like?

Most CSRs are created in the Base-64 encoded PEM format. This format includes the '-----BEGIN CERTIFICATE REQUEST-----' and '-----END CERTIFICATE REQUEST-----' lines at the begining and end of the CSR. A PEM format CSR can be opened in a text editor and looks like the following example:

-----BEGIN CERTIFICATE REQUEST-----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-----END CERTIFICATE REQUEST-----

How do I generate a CSR and private key?

You need to generate a CSR and private key on the server that the certificate will be used on. You can find instructions in your server documentation or try the instructions from one of these certificate authorities:

Comodo CSR Generation Instructions
DigiCert CSR Generation Instructions
Entrust CSR Generation Instructions
GeoTrust CSR Generation Instructions
Thawte CSR Generation Instructions

Once you have your CSR generated, you can use our SSL Wizard to find the best SSL certificate that will meet your needs. If you are familiar with OpenSSL you can use the following command to generate a CSR and private key:

openssl req -new -newkey rsa:2048 -nodes -out servername.csr -keyout servername.key

How do I decode a CSR?

You can easily decode your CSR to see what is in it by using our CSR Decoder. In order to decode a CSR on your own machine using OpenSSL, use the following command:

openssl req -in server.csr -noout -text

What is a CSR/Private Key's bit length?

The bit-length of a CSR and private key pair determine how easily the key can be cracked using brute force methods. As of 2016, a key size of less than 2048 bits is considered weak and could potentially be broken in a few months or less with enough computing power. If a private key is broken, all the connections initiated with it would be exposed to whomever had the key. The Extended Validation guidelines that SSL certificate providers are required to follow, require that all EV certificates use a 2048-bit key size to ensure their security well into the future. Because of this, most providers encourage 2048-bit keys on all certificates whether they are EV or not.

Originally posted on Sun Dec 7, 2008

Important: This example is intended to provide general guidance to IT professionals who are experienced with SSL requirements and configuration. The procedure described in this article is just one of many available methods you can use to generate the required files. The process described here should be treated as an example and not as a recommendation.

When you configure Tableau Server to use Secure Sockets Layer (SSL) encryption, this helps ensure that access to the server is secure and that data sent between Tableau Server and Tableau Desktop is protected.

Looking for Tableau Server on Linux? See Example: SSL Certificate - Generate a Key and CSR.

Tableau Server uses Apache, which includes OpenSSL. You can use the OpenSSL toolkit to generate a key file and Certificate Signing Request (CSR) which can then be used to obtain a signed SSL certificate.

Steps to generate a key and CSR

To configure Tableau Server to use SSL, you must have an SSL certificate. To obtain the SSL certificate, complete the steps:

  1. Generate a key file.
  2. Create a Certificate Signing Request (CSR).
  3. Send the CSR to a certificate authority (CA) to obtain an SSL certificate.
  4. Use the key and certificate to configure Tableau Server to use SSL.

You can find additional information on the SSL FAQ page on the Apache Software Foundation website.

Configure a certificate for multiple domain names

Tableau Server allows SSL for multiple domains. To set up this environment, you need to modify the OpenSSL configuration file, openssl.conf, and configure a Subject Alternative Name (SAN) certificate on Tableau Server. See For SAN certificates: modify the OpenSSL configuration file below.

Set the OpenSSL configuration environment variable (optional)

To avoid using the -config argument with every use of openssl.exe, you can use the OPENSSL_CONF environment variable to ensure that the correct configuration file is used and all configuration changes made in subsequent procedures in this article produce expected results (for example, you must set the environment variable to add a SAN to your certificate).

Open the Command Prompt as an administrator, and run the following command:

set OPENSSL_CONF=c:Program FilesTableauTableau Serverpackagesapache.<version_code>confopenssl.cnf

Notes:

  • When setting the Open SSL configuration environment variable, do not enclose the file path with quotation marks.

  • If you are using a 32-bit version of Tableau Server on a 64-bit computer, run the set OPENSSL_CONF=c:Program Files (x86)TableauTableau Serverpackagesapache.<version_code>confopenssl.cnf command instead.

Generate a key

Generate a key file that you will use to generate a certificate signing request.

  1. Open the Command Prompt as an administrator, and navigate to the Apache directory for Tableau Server. For example, run the following command:

    cd C:Program FilesTableauTableau Serverpackagesapache.<version_code>bin

  2. Run the following command to create the key file:

    openssl.exe genrsa -out <yourcertname>.key 4096

    Note: This command uses a 4096-bit length for the key. You should choose a bit length that is at least 2048 bits because communication encrypted with a shorter bit length is less secure. If a value is not provided, 512 bits is used.

Create a certificate signing request to send to a certificate authority

Use the key file you created in the procedure above to generate the certificate signing request (CSR). You send the CSR to a certificate authority (CA) to obtain a signed certificate.

Important: If you want to configure a SAN certificate to use SSL for multiple domains, first complete the steps in For SAN certificates: modify the OpenSSL configuration file below, and then return to here to generate a CSR.

  1. Run the following command to create a certificate signing request (CSR) file:

    openssl.exe req -new -key yourcertname.key -out yourcertname.csr

    If you did not set the OpenSSL configuration environment variable, OPENSSL_CONF, you might see either of the following messages:

    • An error message about the config information being unable to load. In this case, retype the command above with the following parameter: -config .confopenssl.cnf.

    • A warning that the /usr/local/ssl directory cannot be found. This directory does not exist on Windows, and you can simply ignore this message. The file is created successfully.

    To set an OpenSSL configuration environment variable, see Set the OpenSSL configuration environment variable (optional) section in this article.

  2. When prompted, enter the required information.

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    Note: For Common Name, type the Tableau Server name. The Tableau Server name is the URL that will be used to reach the Tableau Server. For example, if you reach Tableau Server by typing tableau.example.com in the address bar of your browser, then tableau.example.com is the common name. If the common name does not resolve to the server name, errors will occur when a browser or Tableau Desktop tries to connect to Tableau Server.

Send the CSR to a certificate authority to obtain an SSL certificate

Send the CSR to a commercial certificate authority (CA) to request the digital certificate. For information, see the Wikipedia article Certificate authority and any related articles that help you decide which CA to use.

Use the key and certificate to configure Tableau Server

Generate Private Key From Csr

When you have both the key and the certificate from the CA, you can configure Tableau Server to use SSL. For the steps, see Configure External SSL.

For SAN certificates: modify the OpenSSL configuration file

In a standard installation of OpenSSL, some features are not enabled by default. To use SSL with multiple domain names, before you generate the CSR, complete these steps to modify the openssl.cnf file.

Generate Csr Using Existing Key Plan

  1. Open Windows Explorer and browse to the Apache conf folder for Tableau Server.

    For example: C:Program FilesTableauTableau Server<version_code>apacheconf

  2. Open openssl.cnf in a text editor, and find the following line: req_extensions = v3_req

    This line might be commented out with a hash sign (#) at the beginning of the line.

    If the line is commented out, uncomment it by removing the # and space characters from the beginning of the line.

  3. Move to the [ v3_req ] section of the file. The first few lines contain the following text:

    # Extensions to add to a certificate request
    basicConstraints = CA:FALSE
    keyUsage = nonRepudiation, digitalSignature, keyEncipherment

    After the keyUsage line, insert the following line:

    subjectAltName = @alt_names

    If you’re creating a self-signed SAN certificate, do the following to give the certificate permission to sign the certificate:

    1. Add the cRLSign and keyCertSign to the keyUsage line so it looks like the following: keyUsage = nonRepudiation, digitalSignature, keyEncipherment, cRLSign, keyCertSign

    2. After the keyUsage line, add the following line: subjectAltName = @alt_names

  4. In the [alt_names] section, provide the domain names you want to use with SSL.

    DNS.1 = [domain1]
    DNS.2 = [domain2]
    DNS.3 = [etc]

    The following image shows the results highlighted, with placeholder text that you would replace with your domain names.

  5. Save and close the file.

  6. Complete the steps in Create a certificate signing request to send to a certificate authority section, above.

Additional information

Generate Csr Using Existing Key West

If you prefer to use a different version of OpenSSL, you can download it from Open SSL for Windows.

Generate Csr Ubuntu

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