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Open command prompt and navigate to the %JDK_HOME%/bin directory.
Info JDK8 is used in this exercise.
Enter the following command, and then press Enter.
Code Block keytool -keysize 2048 –keystore fiorano.jks –genkey –alias fiorano -keyalg RSA
Tip Use any name for keystore and alias, but they should be carefully used in the subsequent commands.
- Enter a password for thekeystorethe keystore. The password used in this example is "fioranopass".
- Answer all Provide the Organization details as prompted. When prompted for the First Name and Last Name, enter the fully qualified domain name (FQDN), Host Name or URL of the organization for which the certificate is applied for.
For requesting a Wildcard certificate, please add an asterisk * on the left side of the Common Name.
Example: .mydomain.com or www.mydomain.com. This secures all subdomains of the Common Name.Warning All the details provided in this step must be valid. If any of these values are invalid, CA authorities reject the CSR. In this example, fiorano.com is used as the First and Last name, as this certificate is generated to secure RESTful/webservices in fiorano.com.
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A CSR needs to be generated using the keystore created in the previous section. This CSR is used by the CA authorities. Whenever a keystore is changed or updated, a new CSR needs to be generated.
To Generate a CSR,
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perform the actions below:
Enter the following command, and then press Enter:
Code Block keytool –keystore fiorano.jks –certreq –alias fiorano –keyalg rsa –file fiorano.csr -sigalg SHA256withRSA
- Provide keystore password (fioranopass) provided in the Generating a Keystore section above ("fioranopass" is used in our example).
- A file named "fiorano.csr" is gets created which contains the certificate signing request (CSR). This CSR has to be passed on to the external/third party CA ( Certificate Authority (CA).
The CA will authenticate the certificate requestor (usually off-line) and will return a certificate or certificate chain used to replace the existing certificate chain (which initially consists of a self-signed certificate) in the keystore.
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A third-party CA website needs to be approached used to request an SSL certificate using the CSR generated in the Generating a Certificate Signing Request (CSR) section. Third party CA websites such as http://www.thawte.com/ and https://www.godaddy.com can be used to generate SSL certificates. In this example, a 21-day trial certificate of Thawte.com is generated and used but the . But this trial certificate is not recommended for any usage.
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- Open the fiorano.csr file generated in the Generating a Certificate Signing Request (CSR) section.
- Highlight the area from ----BEGIN CERTIFICATE REQUEST to END CERTIFICATE REQUEST---- and press Enter.
- Paste it in the CA website online application to generate SSL certificates.
Using certificates from a CA authority
CA authorities will sybsequently subsequently send a signed certificate, intermediate certificate and root certificate. Import all these certificates into the fiorano.jks keystore file.
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The certificate will only work with the same keystore that you was initially created with the CSR with. The certificates must be installed to your keystore the keystore in the correct order.
Assuming sslcert.pem, intermediate.pem and root.pem are the certificates received from CA authorities, following commands are used to import all the certificates into the keystore.
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When root and intermediate certificates are added to the keystore, a message: "Certificate was added to keystore" is displayed. When primary the primary certificate is added to the keystore, the a message displayed is "Certificate reply was installed in keystore" is displayed.
If there is are no errors in this process, move to the Using the keystore in Fiorano section.
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| Code Block |
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keytool -list -keystore fiorano.jks -storepass fioranopass |
To dispolay display the certificate chain length for fiorano alias, specify the -v option in the above command.
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