The following are top voted examples for showing how to use java.security.KeyPairGenerator.These examples are extracted from open source projects. You can vote up the examples you like and your votes will be used in our system to generate more good examples. 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.
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This procedure uses the Java keytool utility to generate a key and save it to a Java keystore.
NOTE:
![Pair Pair](/uploads/1/2/5/8/125872604/960337915.jpg)
- 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.
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. See the example below to enter these values directly on the command line.
- 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.
An alternate option to responding to prompts is to specify the DN value on the command line using the -dname option. For example:
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This article shows how to securely connect (i.e. establish ssh connection) to the remote host from java application. Also, configuration details for enabling public key authentication and protecting ssh keys will be provided.
![Key Key](/uploads/1/2/5/8/125872604/158400663.png)
Java Code To Generate Rsa Key Pair
Public key authentication enables users to establish an SSH connection without providing (i.e. typing in) explicit password. The immediate benefit is that the password is not transferred over the network, thus preventing the possibility of the password being compromised.
The private key should be stored in the ssh keychain and protected with the encryption passphrase.
The first step is to generate a private/public key on the server where your java application will be running.
Private/public key pair can be generated by executing the following command:
Here is the output from my local development box:
Private key is identified as
id_rsa
and public key as a id_rsa.pub
.The
ssh-copy-id
copies the public key of your default identity (use -i identity_file for other identities) to the remote host.I have used JSch library to establish SSH connection.
The most important part is configuration of
com.jcraft.jsch.Session
object and adding publickey
to the list of PreferredAuthentication
options.Generate Rsa Keypair
Here is the sample code for configuring public key authentication:
The next step is to connect to the remote host and execute an arbitrary command over SSH:
For a full example, you can check out code from the following git repository.
Date: 23 Nov 2015