B4X

SSH Authenticate with a SecureString Password

Demonstrates the Chilkat Ssh.AuthenticateSecPw method, which performs the same authentication as AuthenticatePw but receives the login and password as SecureString objects. The first argument is the login and the second is the password.

Background: A SecureString keeps the credential encrypted in memory, reducing the chance of a plaintext password lingering in the process. The connection-state, retry, and AuthFailReason behavior matches AuthenticatePw; only the credential handling is more protective. Populate the SecureString from a value obtained at runtime, not a hard-coded literal.

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Dim success As Boolean = False

'  Demonstrates the Ssh.AuthenticateSecPw method, which authenticates using SecureString login
'  and password objects.  The 1st argument is the login and the 2nd is the password.

Dim ssh As ChilkatSsh
ssh.Initialize("ssh")

'  Connect to the SSH server.  Port 22 is the usual SSH port.
Dim sshPort As Int = 22
success = ssh.Connect("ssh.example.com", sshPort)
If success = False Then
    Log(ssh.LastErrorText)
    Return
End If


'  Normally you would not hard-code the password in source.  You should instead obtain it
'  from an interactive prompt, environment variable, or a secrets vault.
Dim password As String = "mySshPassword"

'  Place the login and password into SecureString objects.
Dim secureLogin As ChilkatSecureString
secureLogin.Initialize
secureLogin.Append("mySshLogin")
Dim securePassword As ChilkatSecureString
securePassword.Initialize
securePassword.Append(password)

success = ssh.AuthenticateSecPw(secureLogin, securePassword)
If success = False Then
    Log(ssh.LastErrorText)
    Return
End If

Log("Authenticated.")

ssh.Disconnect