VB.NET

IMAP Login using SecureString Credentials

Demonstrates the Chilkat Imap.LoginSecure method, which authenticates a connected session using SecureString credentials. The first argument is the login name and the second is the password. This is the secure-string counterpart of Login; the mechanism is chosen by the AuthMethod property.

Background: A SecureString keeps the credential encrypted in memory and helps avoid leaving plaintext copies lying around in the process, which is why the password should come from an interactive prompt, an environment variable, or a secrets vault — never a hard-coded literal. For XOAUTH2, pass the login name in the first argument and the raw access token (without a Bearer prefix) in the second.

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VB.NET

Dim success As Boolean = False

'  Demonstrates the Imap.LoginSecure method, which authenticates the session using SecureString
'  credentials.  The 1st argument is the login name and the 2nd is the password.

Dim imap As New Chilkat.Imap

imap.Ssl = True
imap.Port = 993

success = imap.Connect("imap.example.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


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

'  Place the login name and password into SecureString objects.
Dim secureLogin As New Chilkat.SecureString
secureLogin.Append("user@example.com")
Dim securePassword As New Chilkat.SecureString
securePassword.Append(password)

success = imap.LoginSecure(secureLogin,securePassword)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("Logged in securely.")

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