(PureBasic) Sending S/MIME Encrypted Email

Sends an encrypted email using the recipient's digital certificate from a .cer file.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkCert.pb"
IncludeFile "CkEmail.pb"
IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

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

    ; The mailman object is used for sending and receiving email.
    mailman.i = CkMailMan::ckCreate()
    If mailman.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Set the SMTP server.
    CkMailMan::setCkSmtpHost(mailman, "smtp.comcast.net")

    ; Load the .cer file into a certificate object.
    ; When sending S/MIME encrypted email, it is the recipient's
    ; certificate that is used for encryption.  Only the public key
    ; is needed to encrypt.  The recipient is the only
    ; one possessing the private key, and therefore is the only
    ; one able to decrypt.
    cert.i = CkCert::ckCreate()
    If cert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkCert::ckLoadFromFile(cert,"cknotes.cer")
    If success <> 1
        Debug CkCert::ckLastErrorText(cert)
        CkMailMan::ckDispose(mailman)
        CkCert::ckDispose(cert)
        ProcedureReturn
    EndIf

    ; Create a new email object
    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkEmail::setCkSubject(email, "This email is encrypted")
    CkEmail::setCkBody(email, "This is a digitally encrypted mail")
    CkEmail::setCkFrom(email, "Chilkat Support <support@chilkatsoft.com>")
    success = CkEmail::ckAddTo(email,"Chilkat Blog","admin@cknotes.com")

    ; Indicate that the email is to be sent encrypted.
    CkEmail::setCkSendEncrypted(email, 1)

    ; Specify the certificate to be used for encryption.
    success = CkEmail::ckSetEncryptCert(email,cert)

    success = CkMailMan::ckSendEmail(mailman,email)
    If success <> 1
        Debug CkMailMan::ckLastErrorText(mailman)
    Else
        Debug "Mail Sent!"
    EndIf



    CkMailMan::ckDispose(mailman)
    CkCert::ckDispose(cert)
    CkEmail::ckDispose(email)


    ProcedureReturn
EndProcedure