Generate Private Key From Certificate Java

Generate Private Key From Certificate Java 5,5/10 3207 reviews

A CSR is encoded text that contains information about the certificate requester. This information includes, but is not limited to, the publisher name for the certificate (referred to as a “Common Name”), organization name (if applicable), and a contact email for the certificate. When creating a CSR it will export two files, these two files will be your CSR, which will be requested during enrollment, and a corresponding private key which should not be shared and will be required during installation.

Java,Certificate chain,Creation, Pure Java.In previous post, we have introduced the use of Certificate and how to generate self signed certificate using Java. In this post, we will show you how to generate a certificate chain. Nov 01, 2018  A private key can be use to sign a document and the public key is use to verify that the signature of the document is valid. The API we use to generate the key pairs is in the java.security package. That’s mean we have to import this package into our code. The class for generating the key pairs is KeyPairGenerator. Mar 29, 2016 This tutorial explains how to create a public private keystore for client and server. You can use these keystores to secure communication between client and server. Following steps are required for generating a public private keystore.

Note: Before proceeding with the instructions below, confirm the Java Development Kit (JDK) is installed correctly on your server or local computer.

The following instructions will guide you through creating a Java Keystore File and CSR. If you already generated the CSR and received your trusted Code Signing Certificate, please click here for Code Signing downloading/exporting Instructions.

1. Run the Keystore prompt

To make a keystore and key file, run the command prompt below:

Private

keytool -genkey -alias server -keyalg RSA -keysize 2048 -keystore keystore.jks

2. Enter the required information, when prompted

  • Enter keystore password:
  • Re-enter new password:
  • What is your first and last name?
  • What is the name of your organization unit?
  • What is the name of your organization?
  • What is the name of your City or Locality?
  • What is the name of your State or Province?
  • What is the two-letter country code for this unit?
  • Is CN = CompanyName or Firstname Lastname, OU=DeparmentName, O=CompanyName, L=City, ST=State, C=CountryCode correct?
  • Enter key password for <server>:

The above command will create a Java keystore file called keystore.jks

Java Keystore Certificate Examples

3. Run the CSR prompt

To make the CSR from the keystore, run the command prompt below:keytool -certreq -alias server -file csr.csr -keystore keystore.jks
Enter keystore password:

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Note: The keystore password is the same password you created in step 2.

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The above command will create the CSR and private key and saves as a .csr file and a .jks file.

4. Generate the order

  1. Copy the newly generated CSR and include the header —–BEGIN NEW CERTIFICATE REQUEST—- and footer —–END NEW CERTIFICATE REQUEST—– tags.
  2. Login to your account
  3. Locate your Incomplete Order
  4. Click Generate Cert Now
  5. Select the option to Create a link
  6. Click the link
  7. Select Java as your Code Signing Certificate Type
  8. Continue and paste in your CSR
  9. Complete the remaining enrollment steps
  10. Congrats! You now have an Order Number

After you complete the validation process and receive the trusted Code Signing Certificate from the issuing Certificate Authority, please click here and proceed to the next step of using our Code Signing Installation Instructions.

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{{#eclipseproject:technology.higgins}}1. To generate a keystore, you need a JDK installed with its /bin directory in your path

2. Create a keystore using this command:

keytool will ask you to enter the values for Common Name (CN), Organizational Unit (OU), Oranization(O), Locality (L), State (S) and Country (C). CN should match the domain name of your webapp if you are planning to use this keystore for your servlet container

You can verify keystore contents using this command:

Generate Private Key From Certificate Java Pdf

3. Generate the Certificate Signing Request (CSR) using this command:

Submit contents of csr-for-myserver.pem file to your CA for signing

You can get a trial certificate from Thawte at https://www.thawte.com/cgi/server/try.exe

4. Save the signed certificate from CA to a file signed-cert.pem

You can see the contents of the signed certificate using this command:

5. Download Root certificate from CA. You can download Thawte Test Root Certificate from http://www.thawte.com/roots/.

6. Import Root Certificate to keystore using this command:

where root-cert.pem is the Root Certificate from CA

7. Verify contents of keystore using this command:

8. Import CA signed certificate to keystore

9. Verify contents of keystore using this command:

The most important thing you want to see is that, under the private key alias, additional information is being displayed. You're looking for this:

How to import existing .key and .crt into .jks

Assume you have an existing .key and .crt from your Apache configuration.

You do this:

1. You convert the private key into PKCS#8 format:

Generate Private Key From Certificate Java Code

2. Since the stupid Java keytool doesn't allow you to import private keys, you download this tool:

3. Now you can import the key into the Java Keystore:

Generate Private Key From Certificate Java File

4. Now you have the Java Keystore:

5. Delete the tmpfile:

Generate Certificate From Private Key Java

Links

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