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To Generate a Certificate by Using keytool

1. Generate Private Key Keystore
2. Generate A Private Key For A Keystore Business
3. Private Key Definition

By default, the keytool utility creates a keystorefile in the directory where the utility is run.

Generating Key Pairs and Importing Public Key Certificates to a Trusted Keystore. Anyway if you are looking to know how to generate a key pair or import a certificate to a Keystore using. It is a little tricky. First you can use keytool to put the private key into PKCS12 format, which is more portable/compatible than Java's various keystore formats. Here is an example taking a private key with alias 'mykey' in a Java keystore and copying it into a PKCS12 file named myp12file.p12. Dec 31, 2018 How to generate a Keystore/CSR using keytool command/utility. Keytool Utility: Keytool is a key and certificate management JDK utility which helps in managing a keystore of private/public keys and associated certificates.

Before You Begin

To run the keytool utility, your shell environmentmust be configured so that the J2SE /bin directory is inthe path, otherwise the full path to the utility must be present on the commandline.

1. Change to the directory that contains the keystore and truststorefiles.

   Always generate the certificate in the directory containingthe keystore and truststore files. The default is domain-dir/config.

2. Generate the certificate in the keystore file, keystore.jks,using the following command format:

   Use any unique name as your keyAlias. Ifyou have changed the keystore or private key password from the default (changeit), substitute the new password for changeit.The default key password alias is s1as.

   A prompt appears that asks for your name, organization, and other information.

3. Export the generated certificate to the server.cer file(or client.cer if you prefer), using the following commandformat:

4. If a certificate signed by a certificate authority is required,see To Sign a Certificate by Using keytool.

5. Create the cacerts.jks truststore file andadd the certificate to the truststore, using the following command format:

   If you have changed the keystore or private key password from the default(changeit), substitute the new password.

   Information about the certificate is displayed and a prompt appearsasking if you want to trust the certificate.

6. Type yes, then press Enter.

   Informationsimilar to the following is displayed:

7. To apply your changes, restart GlassFish Server. See To Restart a Domain.

Example 11–10 Creating a Self-Signed Certificate in a JKS Keystore by Using an RSAKey Algorithm

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

Example 11–11 Creating a Self-Signed Certificate in a JKS Keystore by Using a DefaultKey Algorithm

Example 11–12 Displaying Available Certificates From a JKS Keystore

Example 11–13 Displaying Certificate information From a JKS Keystore

See Also

For more information about keytool, see the keytool reference page.

Generate Private Key Keystore

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

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.

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.

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.

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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.

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.

Generate A Private Key For A Keystore Business

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

Private Key Definition

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.

   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.

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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.