Xojo Plugin

POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted email. Xojo Plugin

Dim success As Boolean
success = False

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// The mailman object is used for receiving (POP3) 
// and sending (SMTP) email.
Dim mailman As New Chilkat.MailMan

// Set the POP3 server's hostname
mailman.MailHost = "pop.example.com"

// Set the POP3 login/password.
mailman.PopUsername = "myLogin"
mailman.PopPassword = "myPassword"

// If running on Microsoft Windows, the Chilkat mailman
// will automatically search the registry-based certificate stores
// for matching certificates and private keys required for
// decryption.  However, on Linux, MAX OS X, and other
// operating systems, no such thing exists.  Therefore, you'll 
// need to specify one or more PFX (.p12 / .pfx) files as
// sources for locating the certs required for decyrption.
success = mailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1")
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

success = mailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx","pfxPassword2")
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

// ...
// Note: On MS Windows, it is not required to provide PFX sources
// if the needed certs and private keys are already installed
// on the system (in the registry-based certificate stores).

// Copy the all email from the user's POP3 mailbox 
// into a bundle object.  The email remains on the server.
Dim bundle As New Chilkat.EmailBundle
Dim keepOnServer As Boolean
keepOnServer = True
Dim headersOnly As Boolean
headersOnly = False
// Irrelevent because we are NOT downloading headers-only
Dim numBodyLines As Int32
numBodyLines = 0
success = mailman.FetchAll(keepOnServer,headersOnly,numBodyLines,bundle)
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

// S/MIME security envelopes are automatically "unwrapped" 
// when a message is retrieved from the server. Signed emails are automatically verified, and 
// encrypted emails are automatically decrypted, restoring the email to the original state before 
// signing and/or encrypting. Information about the signing and encrypting certificates can be 
// retrieved from the Email object (methods: GetSignedByCert, GetEncryptedByCert; 
// properties: SignedBy, EncryptedBy, SignaturesValid, Decrypted, ReceivedSigned, 
// ReceivedEncrypted).

// Loop over the bundle
Dim email As New Chilkat.Email
Dim i As Int32
i = 0
While i < bundle.MessageCount

    success = bundle.EmailAt(i,email)

    System.DebugLog(email.From)
    System.DebugLog(email.Subject)

    // At this point, if the email was signed and/or encrypted, it is already "unwrapped", i.e.
    // the email is already decrypted and in a state as if it were never signed or encrypted.
    // You may check to see if the email was received encrypted or signed, and if so,
    // whether it was successfully unwrapped and who signed or encrypted it:
    If (email.ReceivedEncrypted = True) Then

        System.DebugLog("This email was encrypted when received.")
        If (email.Decrypted = True) Then
            System.DebugLog("This email was successfully decrypted.  It was encrypted by:")
            System.DebugLog(email.EncryptedBy)
        Else
            System.DebugLog("This email was not decrypted.")
        End If

    End If

    If (email.ReceivedSigned = True) Then

        System.DebugLog("This email was signed when received.")
        If (email.SignaturesValid = True) Then
            System.DebugLog("The signature was verified.  It was signed by:")
            System.DebugLog(email.SignedBy)
        Else
            System.DebugLog("The signature verification failed.")
        End If

    End If

    // The email's body, HTML body, attachments, etc.
    // are decrypted and available just like any non-encrypted email.

    System.DebugLog("--")

    i = i + 1
Wend