Xbase++ Requires Chilkat v11.0.0+

POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted email. Xbase++

LOCAL nSuccess
LOCAL oMailman
LOCAL oBundle
LOCAL nKeepOnServer
LOCAL nHeadersOnly
LOCAL nNumBodyLines
LOCAL oEmail
LOCAL i

nSuccess := 0

//  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.
oMailman := CreateObject("Chilkat.MailMan")

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

//  Set the POP3 login/password.
oMailman:PopUsername := "myLogin"
oMailman: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.
nSuccess := oMailman:AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx", "pfxPassword1")
IF (nSuccess == 0)
    ? oMailman:LastErrorText
    oMailman:destroy()
    RETURN
ENDIF

nSuccess := oMailman:AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx", "pfxPassword2")
IF (nSuccess == 0)
    ? oMailman:LastErrorText
    oMailman:destroy()
    RETURN
ENDIF

//  ...
//  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.
oBundle := CreateObject("Chilkat.EmailBundle")
nKeepOnServer := 1
nHeadersOnly := 0
//  Irrelevent because we are NOT downloading headers-only
nNumBodyLines := 0
nSuccess := oMailman:FetchAll(nKeepOnServer, nHeadersOnly, nNumBodyLines, oBundle)
IF (nSuccess == 0)
    ? oMailman:LastErrorText
    oMailman:destroy()
    oBundle:destroy()
    RETURN
ENDIF

//  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
oEmail := CreateObject("Chilkat.Email")
i := 0
DO WHILE i < oBundle:MessageCount

    oBundle:EmailAt(i, oEmail)

    ? oEmail:From
    ? oEmail: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 (oEmail:ReceivedEncrypted == 1)

        ? "This email was encrypted when received."
        IF (oEmail:Decrypted == 1)
            ? "This email was successfully decrypted.  It was encrypted by:"
            ? oEmail:EncryptedBy
        ELSE
            ? "This email was not decrypted."
        ENDIF

    ENDIF

    IF (oEmail:ReceivedSigned == 1)

        ? "This email was signed when received."
        IF (oEmail:SignaturesValid == 1)
            ? "The signature was verified.  It was signed by:"
            ? oEmail:SignedBy
        ELSE
            ? "The signature verification failed."
        ENDIF

    ENDIF

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

    ? "--"

    i := i + 1
ENDDO

oMailman:destroy()
oBundle:destroy()
oEmail:destroy()