Generate Private Key Using Keytool

  1. Private Key Definition
  2. Openssl Generate Rsa Private Key
  3. How To Generate Private Key Using Keytool
  4. Generate Public Private Key Using Keytool

Mar 29, 2016  Generate Client and Server Keystores We start by creating a keystore for the server. Execute the following command in a terminal. This command generates a 2048-bit RSA key pair, which is valid for 365 days and stored under the alias server in the server.jks keystore file. Apr 27, 2016  Scenario You have generated a self signed certificate or a client gives you a certificate with a private key that was signed by the client's signing authority. You want to create a new Java keystore using your new private key or the client's existing private key. Command First you need. Use the same alias as the private key so it associates them together. The alias here must match the alias of the private key in the first command. Keytool -import -trustcacerts -alias mydomain -file mydomain.crt -keystore KeyStore.jks. Jul 02, 2019  Generate self-signed PKCS#12 SSL certificate and export its keys using Java keytool and openssl. ssl-certs.md. MYPASSWORD = password used for the keystore and the private key as well. CN = commonName. Jul 08, 2019  In order to generate the CSR code on Tomcat, you can use keytool commands. First, you need to create a keystore that will contain the private key. Open up a command line interface and run the following command: keytool -genkey -keysize 2048 -keyalg RSA -alias tomcat -keystore yourkeystore.jks. You are free to use any custom alias and a keystore name. Generate a Self Signed Certificate using Java Keytool Now that you know when to use a Keytool self signed certificate, let's create one using a simple Java Keytool command: Open the command console on whatever operating system you are using and navigate to the directory where keytool.exe is located (usually where the JRE is located, e.g.

To Use keytool to Create a ServerCertificate

Run keytool to generate a new key pair in the defaultdevelopment keystore file, keystore.jks. This exampleuses the alias server-alias to generate a new public/privatekey pair and wrap the public key into a self-signed certificate inside keystore.jks. The key pair is generated by using an algorithm oftype RSA, with a default password of changeit. For moreinformation and other examples of creating and managing keystore files, readthe keytool online help at http://download.oracle.com/javase/6/docs/technotes/tools/solaris/keytool.html.

Note –

RSA is public-key encryption technology developed by RSA DataSecurity, Inc.

From the directory in which you want to create the key pair, run keytool as shown in the following steps.

  1. Generate the server certificate.

    Type the keytool command all on one line:


    When you press Enter, keytool prompts you to enterthe server name, organizational unit, organization, locality, state, and countrycode.

    You must type the server name in response to keytool’sfirst prompt, in which it asks for first and last names. For testing purposes,this can be localhost.

    When you run the example applications, the host (server name) specifiedin the keystore must match the host identified in the javaee.server.name property specified in the file tut-install/examples/bp-project/build.properties.

  2. Export the generated server certificate in keystore.jks intothe file server.cer.

    Type the keytool commandall on one line:


  3. If you want to have the certificate signed by a CA, read the exampleat http://download.oracle.com/javase/6/docs/technotes/tools/solaris/keytool.html.

  4. To add the server certificate to the truststore file, cacerts.jks, run keytool from the directory where you createdthe keystore and server certificate.

    Use the following parameters:


    Information on the certificate, such as that shown next, will appear:


  5. Type yes, then press the Enter or Return key.

    The following information appears:


Use Java's Keytool to create a CSR and install your SSL/TLS certificate on your Tomcat (or other Java-based) server

Private

Use these instructions to generate your certificate signing request (CSR) and install your SSL/TLS certificate on your Tomcat server using Java’s Keytool.

Restart Note: After you've installed your SSL/TLS certificate and configured the server to use it, you must restart the Tomcat service.

  1. To create your certificate signing request (CSR), see Tomcat Server: Create Your CSR with Java Keytool.

  2. To install your SSL certificate, see Tomcat Server: Install and Configure Your SSL/TLS Certificate.

To view these instructions in Spanish, see CSR para Tomcat and Tomcat Instalar Certificado SSL.

If you are looking for a simpler way to create CSRs, and install and manage your SSL/TLS certificates, we recommend using the DigiCert® Certificate Utility for Windows. You can use the DigiCert Utility to generate your CSR and prepare your SSL/TLS certificate file for installation on your Tomcat server. See Tomcat: Create CSR & Install SSL/TLS Certificate with the DigiCert Utility.

I. Tomcat Server: Create Your CSR with Java’s Keytool

Use the instructions in this section to create a new keystore (.jks) file and to generate your CSR.

Private Key Definition

Recommended Method: Use the DigiCert Java Keytool CSR Wizard

Save yourself some time: Use the DigiCert Java Keytool CSR Wizard to generate a Keytool command to create your Tomcat keystore and CSR.

  1. Simply fill out the form, click Generate, and then paste your customized Java Keytool command into your terminal.

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  2. The Java keytool utility creates both your private key and your certificate signing request, and saves them to two files: your_common_name.jks, and your_common_name.csr.

  3. You can then copy the contents of the CSR file and paste it into the CSR text box in our order form.

  4. Skip to Step 2, part 3: Save and Back-up Your Keystore File.

Do you prefer a more manual approach to generating your Tomcat keystore and CSR? Follow the instructions below.

Step 1: Use Keytool to Create a New Keystore

Important: We recommend you generate a new keystore following the process outlined in this section. Installing a new certificate to an old keystore often ends in installation errors or the SSL/TLS certificate not working properly. Before you begin this process, backup and remove any old keystores.

Openssl Generate Rsa Private Key

  1. Run Command

    1. Navigate to the directory where you plan to manage your keystore and SSL/TLS certificate.

    2. Enter the command below.

      In the command above, your_site_name should be the name of the domain you want to secure with this SSL/TLS certificate. When ordering a Wildcard certificate, do not include the asterisk (*) in the filename (e.g., your_site_name). The asterisk is not a valid keytool character.

    3. Create a Password

      1. When prompted, create a password for your Keystore.

        Note: You will specify this password in your Tomcat configuration file and then use it to generate your CSR and to import your certificate.

      2. Store this password somewhere safe, such as a trusted and secured password manager.

    4. Enter your SSL/TLS certificate information.

      Important: When prompted for the first and last name, DO NOT type your first and last name. Instead, type the Fully Qualified Domain Name (FQDN) for the site you are securing with this certificate (e.g., www.yourdomain.com, mail.yourdomain.com). Are you are ordering a Wildcard Certificate? Then your FQDN must begin with an asterisk (*). (e.g.,*.yourdomain.com).

    5. Enter your Organization information.

    6. When prompted to verify your information, type y or yes to confirm.

    7. When asked for a 'key password for <server>', press enter to use the password you just created for the keystore file.

  2. Your keystore file, your_site_name.jks, is now created and in your current working directory.

How To Generate Private Key Using Keytool

Step 2: Generate a Certificate Signing Request (CSR) from your New Keystore

Generate Public Private Key Using Keytool

  1. Run Command

    1. In Keytool, type the following command:

      In the command above, your_site_name should be the name of the keystore file you created in Step 1: Use Keytool to Create a New Keystore or when using the DigiCert Java Keytool CSR Wizard.

    2. When prompted, enter the password you created earlier (when you created your new keystore).

    3. In your current directory, csr.txt (e.g., your_site_domain.txt) now contains your CSR.

  2. Save and Back-up Your Keystore File

    1. Take note of the path to your keystore file (your_site_domain.jks) as your SSL/TLS certificate will be installed to it later.

    2. We recommend that you create a back-up copy of your Keystore file (your_site_domain.jks) before continuing. Having a back-up of the Keystore file can help resolve issues that may occur during certificate SSL/TLS installation.

  3. Order Your SSL/TLS Certificate

    1. Open the .csr file you created with a text editor.

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    2. Copy the text, including the -----BEGIN NEW CERTIFICATE REQUEST----- and -----END NEW CERTIFICATE REQUEST----- tags, and paste it in to the DigiCert order form.

    3. Make sure that when you Select Server Software, you select Tomcat.

      4. Tomcat SSL/TLS Certificates, Guides, & Tutorials

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  4. Install Certificate

    After you’ve received your SSL/TLS certificate from DigiCert, you can install it on your Tomcat server.