Lianja

POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted email. Lianja

llSuccess = .F.

// 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("CkMailMan")

// Set the POP3 server's hostname
loMailman.MailHost = "pop.example.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.
llSuccess = loMailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1")
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    return
endif

llSuccess = loMailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx","pfxPassword2")
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    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.
loBundle = createobject("CkEmailBundle")
llKeepOnServer = .T.
llHeadersOnly = .F.
// Irrelevent because we are NOT downloading headers-only
lnNumBodyLines = 0
llSuccess = loMailman.FetchAll(llKeepOnServer,llHeadersOnly,lnNumBodyLines,loBundle)
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    release loBundle
    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
loEmail = createobject("CkEmail")
i = 0
do while i < loBundle.MessageCount

    loBundle.EmailAt(i,loEmail)

    ? 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 = .T.) then

        ? "This email was encrypted when received."
        if (loEmail.Decrypted = .T.) then
            ? "This email was successfully decrypted.  It was encrypted by:"
            ? loEmail.EncryptedBy
        else
            ? "This email was not decrypted."
        endif

    endif

    if (loEmail.ReceivedSigned = .T.) then

        ? "This email was signed when received."
        if (loEmail.SignaturesValid = .T.) 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.

    ? "--"

    i = i + 1
enddo


release loMailman
release loBundle
release loEmail