Public Key User Authenticationﾠﾠﾠ

Owned by NetSarang Support
Apr 30, 2019
2 min read

For public key user authentication, a pair of user keys must be created comprised of a public key and a private key. While public key authentication is carried out, the private key is used by Xftp to create a user signature and the public key is used by SSH server to check the signature.
A user key can be created in either the SSH server or Xftp. If the user key was created from the server, the private key must be registered in the Xftp private key repository using the Xftp import function. If the user key was created from Xftp, the public key must be registered in the server.

To Create a User Key:

  1. Select [New User Key Wizard] from the [Tools] menu.
  2. Create a user key according to instructions given by the New User Key Wizard.
  • Note
    Register a public key in a server at the last stage of key creation. Registration methods vary depending on server types.
  • SSH1: Copy the public key text and save it to $HOME/.SSH/authorized_keys file. Execute the following command to turn off the write permission of the files and directories. $ cd$ chmod go-w . .ssh .ssh/authorized_keys
  • SSH2-OpenSSH: OpenSSH servers use this format. Copy the public key text and save it to $HOME/.SSH/authorized_keys2 file. Execute the following command to turn off the write permission of the files and directories. $ cd$ chmod go-w . .ssh .ssh/authorized_keys2
  • SSH2-IETF SECSH: Some commercial SSH servers, such as the ssh.com server, use this format. Save the public key under an intrinsic name, such as mypublickey.pub, and copy it to $HOME/.ssh2 directory. Add the following line to the $HOME/.ssh2/authorization file: Key mypublickey.pub Execute the following command to turn off the write permission of the files and directories. $ cd $ chmod go-w . .ssh2$ chmod go-w .ssh2/authorization .ssh2/mypublickey.pub


To Register a Public Key in a Server:

  1. Select [User Key Manager] from the [Tools] menu and the User Keys dialog box is displayed.
  2. Select a user key to register.
  3. Click [Properties]. The User Key Properties dialog box is displayed.
  4. Click the [Public Key] tab.
  5. Select an appropriate type from the [Public Key Format] list.
  6. Save user key by clicking [Save as a file] or copy the key and register it to the server according to public key registration methods above.

To Change the User Key Passphrase:

  1. Open the User Keys dialog box.
  2. Select a user key for which to change the passphrase.
  3. Click [Properties]. The User Key Properties dialog box is displayed.
  4. Click the [General] tab.
  5. Click [Change Passphrase].
  • Note
    Import, export, rename, delete, and create a user key in the 'User Keys Dialog Box'.