Creating a KeyStore in JKS Format

  • Jan 09, 2017  JKS file is a Java keystore. Using the Java keytool program, run the following commands Export the.der file keytool -export -alias sample -file sample.der -keystore my.jks Convert the.der file to unencrypted PEM (crt file) openssl x509 -inform der -in sample.der -out sample.crt Export the.p12 file keytool -importkeystore -srckeystore my.jks -destkeystore.
  • The first command puts the root CA’s certificate into the keystore. Since the key store doesn’t exist, it will create it automatically: keytool -import -trustcacerts -file 'd:certAddTrustExternalCARoot.crt' -alias AddTrustExternalCARoot -keystore d:certwildcard.jks -storepass xxx.
  • A certificate.crt and privateKey.key can be extracted from your Personal Information Exchange file (certificate.pfx) using OpenSSL. Follow this article to create a certificate.crt and privateKey.key files from a certificate.pfx file.
  • Keytool -import -trustcacerts -alias mydomain -file mydomain.crt -keystore keystore.jks. Generate a keystore and self-signed certificate keytool -genkey -keyalg RSA -alias selfsigned -keystore keystore.jks -storepass password -validity 360 -keysize 2048. Check a stand-alone certificate. Keytool -printcert -v -file 8gwifi.crt.
  • Jun 15, 2018  Before you begin. Be sure to go through the recommendations for setting up keystores in WSO2 products to understand the types of keystores you need. Creating a new keystore. There are two ways to create keystores for a WSO2 product. You can either generate a keystore using an already existing public key certificate (CA-signed), or you can create the.
  • Jan 21, 2009 How to get your java keystore/truststore from pem files January 21, 2009 January 21, 2009 sun Requirement: Create JKS keystore and truststore out of certificate and private key files given in pem format.

This section explains how to create a KeyStore using theJKS format as the database format for both the private key, and theassociated certificate or certificate chain. By default, as specifiedin the java.security file, keytool usesJKS as the format of the key and certificate databases (KeyStore andTrustStores). A CA must sign the certificate signing request (CSR).The CA is therefore trusted by the server-side application to whichthe Adapter is connected.

Creating a KeyStore in JKS Format. This section explains how to create a KeyStore using the JKS format as the database format for both the private key, and the associated certificate or certificate chain. By default, as specified in the java.security file, keytool uses JKS as the format of the key and certificate databases (KeyStore.

Note –

Itis recommended to use the default KeyStore


where <c:JavaCAPS> isthe directory where Java CAPS is installed and <MyDomain> isthe name of your domain.

To Generate a KeyStore

  1. Perform the following command.


  2. Once prompted, enter the information required to generatea CSR. A sample key generation section follows.


    If the KeyStore password is specified, then the password mustbe provided for the adapter.

  3. Press RETURN when prompted for the key password (thisaction makes the key password the same as the KeyStore password).

    This operation creates a KeyStore file clientkeystore in the current working directory. You must specify a fullyqualified domain for the “first and last name” question.The reason for this use is that some CAs such as VeriSign expect thisproperties to be a fully qualified domain name.

    Thereare CAs that do not require the fully qualified domain, but it isrecommended to use the fully qualified domain name for the sake ofportability. All the other information given must be valid. If theinformation cannot be validated, a CA such as VeriSign does not signa generated CSR for this entry.

    This KeyStore containsan entry with an alias of client.This entry consists of the generated private key and information neededfor generating a CSR as follows:


    This command generates a certificate signing request which canbe provided to a CA for a certificate request. The file client.csr contains the CSR in PEM format.

    Some CA (one trusted by the web server to which the adapteris connecting) must sign the CSR. The CA generates a certificate forthe corresponding CSR and signs the certificate with its private key.For more information, visit the following web sites:

    or

    If the certificate is chained with the CA’scertificate, perform step 4; otherwise, perform step 5 in the followinglist:

  4. Perform the following command.


    The command imports the certificate and assumes the client certificateis in the file client.cer and theCA’s certificate is in the file CARoot.cer.

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  5. Perform the following command to import the CA’scertificate into the KeyStore for chaining with the client’scertificate.


  6. Perform the following command to import the client’scertificate signed by the CA whose certificate was imported in thepreceding step.


    The generated file clientkeystore containsthe client’s private key and the associated certificate chainused for client authentication and signing. The KeyStore and/or clientkeystore, can then be used as the adapter’sKeyStore.

To Generate a Certificate by Using keytool

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

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

Generate Private Key File



Example 11–12 Displaying Available Certificates From a JKS Keystore

Generate Jks File From Crt And Key Free


Example 11–13 Displaying Certificate information From a JKS Keystore


See Also

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