Generate Public Key From Private Key Keytool

Posted on 07.04.202022.08.2017by admin

Steps to generate self-signed PKCS#12 SSL certificate and export its keys:

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1- Create PKCS#12 keystore (.p12 or .pfx file)

Create PKCS 12 file using your private key and CA signed certificate of it. You can use openssl command for this. Create JKS file using keytool command. Step 3 (Optional). Changing the password of private key file in keystore. More details from here as well. Step 4 (Optional). Apr 23, 2012 RSA authentication uses public and private keys instead of passwords to authenticate with the ESP Server. The Java keytool utility is used to generate RSA keys when the client is in Java. Open a command prompt or terminal.

myKeystore.p12 = keystore filename. It can with .pfx extension as well.
MY_PASSWORD = password used for the keystore and the private key as well.
CN = commonName, it will be shown as certiciate name in certificates list.
OU = organizationUnit, department name for example.
O = organizationName, the company name.
L = localityName, the city.
S = stateName, the state.
C = country, the 2-letter code of the country.

I would like to export my private key from a Java Keytool keystore, so I can use it with openssl. I would like to export my private key from a Java Keytool keystore, so I can use it with openssl. How can I do that? Import Public Private key pair to a Keystore. Is keystore file (server.jks), my private key file?
When your server sends a browser its public key, the browser can encrypt messages that only your server can read, because only your server has the matching private key. Build the keystore Building a Java KeyStore is the first step in configuring your Code42 server to use your own CA-signed SSL certificate.

Note: This step can be done using openssl but it's more complicated.

2- Create the public certificate (has the header -----BEGIN CERTIFICATE-----):

Using keytool:

Or using openssl:

Note: Import public-certificate.pem into browsers to trust it. Add it to 'Trusted Root Certification Authorities' certificate store.

Click Authenticate email. Generating dkim keys google suite. Click Start authentication. Select the domain where you want to start email signing. The page shows the status of email signing for the selected domain.

3- Export the private key (has the header -----BEGIN PRIVATE KEY-----):

4- Export the public key from the private key (has the header -----BEGIN PUBLIC KEY-----):

Generate Private And Public Key

When you are working with JAVA applications and JAVA based server, you may need to configure a Java key store (JKS) file. Self signed keystore can be easily created with keytool command. But if you have a private key and a CA signedcertificate of it, You can not create a key store with just one keytool command.

You need to go through following to get it done.

Step 1. Create PKCS 12 file using your private key and CA signed certificate of it. You can use openssl command for this.

If your private key has a password, It would promote to enter the password of private key. You need to define a password for PKCS 12 file as well.

As an example, say i have a private key called “server.pem” and certificate with “servercret.pem”

Step 2. Create JKS file using keytool command

Created PKCS 12 file has been given as the source keystore and new file name (wso2carbon.jks) has been given as the destination keystore.