Openssl Private Public Keystore Generieren Cname

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Configuring Java CAPS for SSL Support
The following sections explain how to create both a KeyStore and a TrustStore (or import a certificate into an existing TrustStore such as the default Logical Host TrustStore in the location:


\appserver\domains\\config\cacerts.jks
where is the directory where Java CAPS is installed and is the name of your domain. The primary tool used is keytool, but openssl is also used as a reference for generating pkcs12 KeyStores.
For more information on openssl and available downloads, visit the following web site:
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 and TrustStores). A CA must sign the certificate signing request (CSR). The CA is therefore trusted by the server-side application to which the Adapter is connected.
It is recommended to use the default KeyStore


\appserver\domains\\config\keystore.jks
where is the directory where Java CAPS is installed and is the name of your domain.


keytool -keystore clientkeystore -genkey -alias client
Once prompted, enter the information required to generate a CSR. A sample key generation section follows.


Enter keystore password: javacaps
What is your first and last name?
[Unknown]: development.sun.com
What is the name of your organizational unit?
[Unknown]: Development
what is the name of your organization?
[Unknown]: Sun
What is the name of your City or Locality?
[Unknown]: Monrovia
What is the name of your State or Province?
[Unknown]: California
What is the two-letter country code for this unit?
[Unknown]: US
Is correct?
[no]: yes

Enter key password for
(RETURN if same as keystore password):
If the KeyStore password is specified, then the password must be provided for the adapter.
Press RETURN when prompted for the key password (this action 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 fully qualified domain for the “first and last name” question. The reason for this use is that some CAs such as VeriSign expect this properties to be a fully qualified domain name.
There are CAs that do not require the fully qualified domain, but it is recommended to use the fully qualified domain name for the sake of portability. All the other information given must be valid. If the information cannot be validated, a CA such as VeriSign does not sign a generated CSR for this entry.
This KeyStore contains an entry with an alias of client. This entry consists of the generated private key and information needed for generating a CSR as follows:


keytool -keystore clientkeystore -certreq -alias client -keyalg rsa -file client.csr
This command generates a certificate signing request which can be 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 adapter is connecting) must sign the CSR. The CA generates a certificate for the corresponding CSR and signs the certificate with its private key. For more information, visit the following web sites:
If the certificate is chained with the CA’s certificate, perform step 4; otherwise, perform step 5 in the following list:


keytool -import -keystore clientkeystore -file client.cer -alias client
The command imports the certificate and assumes the client certificate is in the file client.cer and the CA’s certificate is in the file CARoot.cer.
Perform the following command to import the CA’s certificate into the KeyStore for chaining with the client’s certificate.


keytool -import -keystore clientkeystore -file CARoot.cer -alias theCARoot
Perform the following command to import the client’s certificate signed by the CA whose certificate was imported in the preceding step.


keytool -import -keystore clientkeystore -file client.cer -alias client
The generated file clientkeystore contains the client’s private key and the associated certificate chain used for client authentication and signing. The KeyStore and/or clientkeystore, can then be used as the adapter’s KeyStore.
This section explains how to create a PKCS12 KeyStore to work with JSSE. In a real working environment, a customer could already have an existing private key and certificate (signed by a known CA). In this case, JKS format cannot be used, because it does not allow the user to import/export the private key through keytool. It is necessary to generate a PKCS12 database consisting of the private key and its certificate.
The generated PKCS12 database can then be used as the Adapter’s KeyStore. The keytool utility is currently lacking the ability to write to a PKCS12 database. However, it can read from a PKCS12 database.
There are additional third-party tools available for generating PKCS12 certificates, if you want to use a different tool.
For the following example, openssl is used to generate the PKCS12 KeyStore:


cat mykey.pem.txt mycertificate.pem.txt>mykeycertificate.pem.txt
The existing key is in the file mykey.pem.txt in PEM format. The certificate is in mycertificate.pem.txt, which is also in PEM format. A text file must be created which contains the key followed by the certificate as follows:


openssl pkcs12 -export -in mykeycertificate.pem.txt -out mykeystore.pkcs12
-name myAlias -noiter -nomaciter
This command prompts the user for a password. The password is required. The KeyStore fails to work with JSSE without a password. This password must also be supplied as the password for the Adapter’s KeyStore password.
This command also uses the openssl pkcs12 command to generate a PKCS12 KeyStore with the private key and certificate. The generated KeyStore is mykeystore.pkcs12 with an entry specified by the myAlias alias. This entry contains the private key and the certificate provided by the -in argument. The noiter and nomaciter options must be specified to allow the generated KeyStore to be recognized properly by JSSE.
For demonstration purposes, suppose you have the following CAs that you trust: firstCA.cert, secondCA.cert, thirdCA.cert, located in the directory C:\cascerts. You can create a new TrustStore consisting of these three trusted certificates.


keytool -import -file C:\cascerts\firstCA.cert -alias firstCA -keystore myTrustStore
Enter this command two more times, but for the second and third entries, substitute secondCA and thirdCA for firstCA. Each of these command entries has the following purposes:
The first entry creates a KeyStore file named myTrustStore in the current working directory and imports the firstCA certificate into the TrustStore with an alias of firstCA. The format of myTrustStore is JKS.
For the second entry, substitute secondCA to import the secondCA certificate into the TrustStore, myTrustStore.
For the third entry, substitute thirdCA to import the thirdCA certificate into the TrustStore.
Once completed, myTrustStore is available to be used as the TrustStore for the adapter.
© 2010, Oracle Corporation and/or its affiliates

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We have JAVA server and client communicate over a network using SSL. The server and client mutually authenticate each other using certificates. The keystore type used by the server and client is JKS. The server and client loads their keystore and truststore files. The keystore and truststore file names are: server.keystore, server.truststore, client.keystore, and client.truststore. I am using Self-Signed certificates for testing only.
Q1. I would like to know why I need to add server’s and client’s own certificates into their respective truststores, in step 6.
Q2. Can I reduce the number steps to achieve the same thing? If yes, then how?
Steps to create RSA key, self-signed certificates, keystore, and truststore for a server
Create a PKCS12 keystore from private key and public certificate.
Convert PKCS12 keystore into a JKS keystore
Import a client's certificate to the server's trust store.
Import a server's certificate to the server's trust store.
Steps to create RSA private key, self-signed certificate, keystore, and truststore for a client
Create PKCS12 keystore from private key and public certificate.
Convert a PKCS12 keystore into a JKS keystore
Import a server's certificate to the client's trust store.
Import a client's certificate to the client's trust store.
vic99
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Ulrich Schwarz
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Normal https only requires 1 command;
If the client is not blindly trusting any cert, then you need to copy your server public cert to the client.
user1133275
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Until my edit gets peer reviewed: The flag is -genkeypair and you can add a lot of different flags to customize the certificate (e.g. -validity 365 or -dname "cn=Mark Jones, ou=JavaSoft, o=Sun, c=US"). Best see the link in the answer for more details. – Johannes Stadler Jul 27 '18 at 9:24
@JohannesStadler Thanks I approved your edit and updated the link to the latest java version, note that "This command was named -genkey in previous releases" – user1133275 Jul 27 '18 at 14:16
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