VB.NET

Authenticate an IMAP SSH Tunnel with a Password

Demonstrates the Chilkat Imap.SshAuthenticatePw method, which authenticates the SSH tunnel using a username and password. The first argument is the SSH login name and the second is the SSH password. Call SshOpenTunnel first; after SSH authentication succeeds, connect and log in to IMAP.

Background: This is SSH authentication, which is entirely separate from the IMAP login that follows — the SSH credentials belong to the tunnel/jump host, while the IMAP credentials belong to the mail account. Password authentication is the simplest option; use SshAuthenticatePk for key-based authentication, which is generally preferred for automated jobs.

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Dim success As Boolean = False

'  Demonstrates the Imap.SshAuthenticatePw method, which authenticates the SSH tunnel with a
'  username and password.  The 1st argument is the SSH login name and the 2nd is the SSH
'  password.  Call SshOpenTunnel first.

Dim imap As New Chilkat.Imap

'  Open the SSH tunnel first.
Dim sshPort As Integer = 22
success = imap.SshOpenTunnel("ssh.example.com",sshPort)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  The SSH password is not hard-coded in source.  Insert code here to obtain it from an
'  interactive prompt, environment variable, or a secrets vault.
Dim sshPassword As String

'  Authenticate the SSH tunnel (this is SSH authentication, separate from IMAP login).
success = imap.SshAuthenticatePw("sshUser",sshPassword)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  With the SSH tunnel in place, connect and log in to the IMAP server as usual.  The IMAP
'  traffic flows through the tunnel automatically.
imap.Ssl = True
imap.Port = 993
success = imap.Connect("imap.example.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If

success = imap.Login("user@example.com","myPassword")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


success = imap.Disconnect()
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


success = imap.SshCloseTunnel()
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If