If you have the private key and public key, execute the following command: openssl x509 -x509toreq -in certname.crt -out -signkey key.key Once you generate the CSR, you need to submit the CSR to your certificate authority to get a new CA-signed certificate. To generate a new public/private key pair in a Java keystore. Use the -genkeypair option to generate a key and save it to a Java keystore (newkeystore.jks in this example). The example shown here prompts you to enter values for items that make up the distinguished name (DN) in the certificate. Command: keytool -list -v -keystore identity.jks -storepass password - The ImportPrivateKey utility is used to load a private key into a private keystore file. You can use the CertGen utility to create a.key ( testkey ) and.crt ( testcert ) and then use the ImportPrivateKey utility to create a.jks file. I need to create keystore and truststore with root signed certificates. I have these files (at this step they are identical for client and for server): clientcert.pem clientprvkey.pem rootcer.
How To Generate Jks
Jun 19, 2010 Generate a.jks keystore using.key and.crt files: Notes: x509 standard assumes a strict hierarchical system of certificate authorities (CAs) for issuing the certificates. Structure of a certificate: The structure of an X.509 v3 digital certificate is as follows:. Certificate Version Serial Number Algorithm ID Issuer Validity Not Before Not.
This procedure uses the Java keytool utility to generate a key and save it to a Java keystore.
NOTE:
The CA you use might have specific options required for creating an HTTPS certificate. Review the instructions provided by the CA before creating your key pair.
DSA keys used in Reflection Gateway server certificates must be either 2048 or 3072 bits. RSA keys must be between 2048 and 4096 bits.
Import Ssl Certificate Jks
To generate a new public/private key pair in a Java keystore
Jks Certificate
Use the -genkeypair option to generate a key and save it to a Java keystore (newkeystore.jks in this example). The example shown here prompts you to enter values for items that make up the distinguished name (DN) in the certificate. See the example below to enter these values directly on the command line.
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The keytool prompts you to enter a password and values for the items that make up the distinguished name (DN) in the certificate (name = CN, organizational unit = OU, organization = O, city or locality = L, state or province = S, two letter country code = C). The generated DN will use the value 'Unknown' for any fields you don't specify.
When you are prompted with “What is your first and last name?'
You must enter the DNS name that is used to access the Reflection Gateway server (for example gateway.mycompany.com). This value is used as the CN (Common Name) in the certificate. If the CN in a certificate doesn't match the actual DNS name used to access the server, you will see a certificate warning when you connect to the server.
When you are prompted with 'What is the two-letter country code for this unit?'
You must enter a valid two-letter country code (for example US).
When you are prompted for a password for the alias, press Enter to use the same password you used for the keystore.
Create Jks From Cert
An alternate option to responding to prompts is to specify the DN value on the command line using the -dname option. For example:
It should be set to FAT32 for 32GB SD cards. Select Quick Format. 
Once the formatting is complete, you can close the window. Click Start. In the Format window make sure that the correct File System is selected.