1. Private Key Definition
2. Public Private Key Encryption

When I try to create a ssh key pair using ssh-keygen -t rsa -b 4096 -C 'youremail@example.com' it creates a public key idrsa.pub and a private key idrsa. But this file does not have a.ppk extension. How can we generate a.pub and.ppk file? I can also use puttygen. This how to will show how to convert idrsa keys that were already created on Linux, without a passphrase, to.ppk extension so it can be used with Putty on a Windows box. Download PuttyGen from here and open it. Once it opens click on Conversions = Import Key. Search for the idrsa key on you computer. After this operation is completed, your key can be found in /.ssh and will be sent in any SSH connections that you make by default. The idrsa file is your private key and should be kept in a safe place. The idrsa.pub file is your public key and can be given to the SingleComm ops team to be installed on any server that you require access to. Key generation with PuTTY. To generate a key pair with the PuTTY key generator. By convention, the private key is usually called idrsa and the public key idrsa.pub, but this isn’t a requirement. It’s common to have many keys with more descriptive filenames, for instance. Set up SSH public key authentication. Generate Key Pair. Specify path to your private key on SSH Authentication page of Advanced Site Settings dialog.

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. https://cleversex284.weebly.com/blog/download-memory-map-for-mac. 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.

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

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.

Generate RSA keys with SSH by using PuTTYgen

One effective way of securing SSH access to your cloud server is to usea public-private key pair. This means that a public key is placed onthe server and a private key is placed on your local workstation.Using a key pair makes it impossible for someone to log in by using justa password, as long as you set up SSH to deny password-basedauthentication.

This article provides steps for generating RSA keys by using PuTTYgen onWindows for secure SSH authentication with OpenSSH.

Generate keys

In Windows, use PuTTYgen to generate your public and private keys.

1. If needed, download PuTTYgen from the PuTTY download page.(PuTTYgen might have been installed previously with PuTTY or WinSCP.)
2. Launch the program, and then click the Generate button.The program generates the keys for you.
3. Enter a unique key passphrase in the Key passphrase andConfirm passphrase fields.For additional information about using passphrases,see Log in with a SSH Private Key on Windows.
4. Save the public and private keys by clicking the Save public keyand Save private key buttons.
5. From the Public key for pasting into OpenSSH authorized_keys filefield at the top of the window, copy all the text (starting with ssh-rsa)to your clipboard by pressing Ctrl-C.You need this key available on your clipboard to paste eitherinto the public key tool in the Control Panel or directly into theauthorized keys on your cloud server.

Use the key pair

You can use the RSA key pair in the following ways.

Specify your SSH key when creating a new cloud server

When you create a cloud server, you can assign a public key from the list of keys.If your key is not already in the list, you may add it, and then assign it.

Add a new public key to the list

1. Under Advanced Options on the Create Server page, click Manage SSHKeys.
2. Select public key for the cloud server from the SSH Keys listand click Add Public Key.
3. Enter the key name, select the region, and paste the entire publickey into the Public Key field. Then click Add Public Key.
4. Go back to the Create Server page, and confirm that your key is listedin the SSH Key list.

Assign a public key

Private Key Definition

1. Under Advanced Options on the Create Server page, select the publickey you want to use from the SSH key drop-down menu.
2. When you are done specifying the all the other details for the server,click Create Server.

Assign your SSH Key to an existing cloud server

To make use of your newly generated RSA key pair, you must tell PuTTY touse it when connecting to your cloud server.

1. To edit the file (or create it), run the following command on the cloud server:

2. Paste the text onto its own line in the file.

   You must have the key available in your clipboard to paste it. The key and itsassociated text (the ssh-rsa identified at the start and the comment at the end)must be on one line in the file. If the text is word-wrapped onto multiple linesan error might occur when connecting.

3. If you created the authorized_keys file, change its permissionsafter you’re done editing it by running the following command:

4. Open PuTTY, and go to the SSH > Auth section.

5. Browse to the location of the key file, and load the private key.

6. Go to the Session page, and save the session. This saves the configurationso that PuTTY uses the key every time that you connect to your cloudserver.

After you save your session, your key is loaded automatically when youconnect to your server.

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Public Private Key Encryption

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