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(Visual FoxPro) POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted email.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loMailman
LOCAL lnSuccess
LOCAL loBundle
LOCAL i
LOCAL loEmail

* 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.
loMailman = CreateObject('Chilkat_9_5_0.MailMan')

* Set the POP3 server's hostname
loMailman.MailHost = "pop.someMailServer.com"

* Set the POP3 login/password.
loMailman.PopUsername = "myLogin"
loMailman.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.
lnSuccess = loMailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1")
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    CANCEL
ENDIF

lnSuccess = loMailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx","pfxPassword2")
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    CANCEL
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.
loBundle = loMailman.CopyMail()
IF (loMailman.LastMethodSuccess = 0) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    CANCEL
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, 
i = 0
DO WHILE i < loBundle.MessageCount

    loEmail = loBundle.GetEmail(i)

    ? loEmail.From
    ? loEmail.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 (loEmail.ReceivedEncrypted = 1) THEN

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

    ENDIF

    IF (loEmail.ReceivedSigned = 1) THEN

        ? "This email was signed when received."
        IF (loEmail.SignaturesValid = 1) THEN
            ? "The signature was verified.  It was signed by:"
            ? loEmail.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.

    ? "--"
    RELEASE loEmail

    i = i + 1
ENDDO

RELEASE loBundle

RELEASE loMailman


 

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