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How to Generate a Public/Private Key Pair for Use With Solaris Secure Shell. Users must generate a public/private key pair when their site implements host-based authentication or user public-key authentication. For additional options, see the ssh-keygen(1) man page. Before You Begin.

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  1. I want to SSH from Server 1 to Server 2 using a private key I have (OpenSSH SSH-2 Private Key). I don't know how to do it over unix. But what I did on windows using Putty was to feed my OpenSSH private key to putty-gen and generate a private key in PPK format.
  2. Jul 17, 2017  To ssh using pem file there are few steps you have to follow 1.Generating Key Pairs. To generate an RSA key pair for version 2 of the SSH protocol, follow these steps: Generate an RSA key pair by typing the following at a shell prompt: $ ssh-keygen or $ ssh-keygen -t rsa -b 2048 -v.

How do I create a host key file to use with my applications as I can not use system defined /etc/ssh/ssh_host_rsa_key for non-root account under Linux / Unix / Apple OS X / *BSD operating systems?
You need to use a command called ssh-keygen. This command generates, manages and converts authentication keys for ssh. It can create RSA keys for use by SSH protocol version 1 and RSA or DSA keys for use by SSH protocol version 2. he type of key to be generated is specified with the -t option. If invoked without any arguments, ssh-keygen will generate an RSA key for use in SSH protocol 2 connections. The -f option specifies the filename of the key file.

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Why create a new host key files?

You may need a new key file:

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  1. Your system is compromised.
  2. Your keys are stolen.
  3. You forgotten the passphrase.
  4. Your application need a new host key.
  5. You can not read the default system key files stored in /etc/ssh/ directory but your non-root application needs key.
  6. You got an error message which read as “Could not load host key: /etc/ssh/ssh_host_key*”.

ssh-keygen Syntax

The syntax is:

Example

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Create a host key file in your $HOME/.ssh/myapp as follows. First, create a directory to store your host key file, enter:
$ mkdir -p $HOME/.ssh/myapp
To create a host RSAv2 key file, run:
$ ssh-keygen -t rsa -f $HOME/.ssh/myapp/rsa_key_file
Sample outputs:

Type the following commands to verify the keys:
$ ls -l $HOME/.ssh/myapp/
Sample outputs:

You can now use keys with your app:
$ mycool-app -key $HOME/.ssh/myapp/rsa_key_file -d

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How to Generate a Public/Private KeyPair for Use With Solaris Secure Shell

Users must generate a public/private key pair when their site implementshost-based authentication or user public-key authentication. For additionaloptions, see the ssh-keygen(1) manpage.

Before You Begin

Determine from your system administrator if host-based authenticationis configured.

  1. Start the key generation program.


    where -t is the type of algorithm, one of rsa, dsa, or rsa1.

  2. Specify the path to the file that will hold the key.

    Bydefault, the file name id_rsa, which represents an RSAv2 key, appears in parentheses. You can select this file by pressing the Return key. Or, you can type an alternative file name.


    The file name of the public key is created automatically by appendingthe string .pub to the name of the private key file.

  3. Type a passphrase for using your key.

    This passphraseis used for encrypting your private key. A null entry is stronglydiscouraged. Note that the passphrase is not displayed when youtype it in.


  4. Retype the passphrase to confirm it.


  5. Check the results.

    Check that the path to the keyfile is correct.


    At this point, you have created a public/private key pair.

  6. Choose the appropriate option:

    • If your administrator has configuredhost-based authentication, you might need to copy the local host's publickey to the remote host.

      You can now log in to the remote host.For details, see How to Log In to a Remote Host With Solaris Secure Shell.

      1. Type the command on one line with no backslash.


      2. When you are prompted, supply your login password.


    • If your site uses user authentication with public keys, populateyour authorized_keys file on the remote host.

      1. Copy your public key to the remote host.

        Type thecommand on one line with no backslash.


      2. When you are prompted, supply your login password.

        Whenthe file is copied, the message “Key copied” is displayed.


  7. (Optional) Reduce the prompting for passphrases.

    For a procedure, see How to Reduce Password Prompts in Solaris Secure Shell. For more information, see the ssh-agent(1) and ssh-add(1) man pages.

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Example 19–2 Establishing a v1 RSA Key for a User

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In the following example, the user cancontact hosts that run v1 of the Solaris Secure Shell protocol. To be authenticated by v1hosts, the user creates a v1 key, then copies the public key portion to theremote host.

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