(Visual FoxPro) Send Signed Email using PFX File (long version)

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loMailman
LOCAL loEmail
LOCAL lnSuccess
LOCAL loCertStore
LOCAL loCert
LOCAL loCert2

* 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.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.MailMan')
loMailman = CreateObject('Chilkat.MailMan')

* Set the SMTP server.
loMailman.SmtpHost = "smtp.mymailserver.com"

* Create a new email object
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Email')
loEmail = CreateObject('Chilkat.Email')

loEmail.Subject = "This email is signed"
loEmail.Body = "This is a digitally signed mail"
loEmail.From = "Chilkat Admin <admin@chilkatsoft.com>"
lnSuccess = loEmail.AddTo("Chilkat Support","support@chilkatsoft.com")

* Indicate that the email should be sent signed.
loEmail.SendSigned = 1

* Load a PFX file into a certificate store object.
* Then locate the certificate matching the  sender's email address,
* and use it for signing.
* (a PFX file may contain more than one certificate.)
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.CertStore')
loCertStore = CreateObject('Chilkat.CertStore')
* The 1st argument is the path of the PFX file, the 2nd arg is the 
* PFX file's password:
lnSuccess = loCertStore.LoadPfxFile("/pfx_files/chilkatsoft_secret.pfx","secret")
IF (lnSuccess <> 1) THEN
    ? loCertStore.LastErrorText
    RELEASE loMailman
    RELEASE loEmail
    RELEASE loCertStore
    CANCEL
ENDIF

loCert = loCertStore.FindCertBySubjectE("admin@chilkatsoft.com")
IF (loCertStore.LastMethodSuccess = 0) THEN
    ? loCertStore.LastErrorText
    RELEASE loMailman
    RELEASE loEmail
    RELEASE loCertStore
    CANCEL
ENDIF

* Alternatively, if a PFX file is known to contain a single certificate,
* you may load it directly into a Chilkat certificate object.
* This snippet of source code shows how:
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Cert')
loCert2 = CreateObject('Chilkat.Cert')
* The 1st argument is the filename, the 2nd arg is the 
* PFX file's password:
lnSuccess = loCert2.LoadPfxFile("/pfx_files/chilkatsoft_secret.pfx","secret")
IF (lnSuccess <> 1) THEN
    ? loCert2.LastErrorText
    RELEASE loCert
    RELEASE loMailman
    RELEASE loEmail
    RELEASE loCertStore
    RELEASE loCert2
    CANCEL
ENDIF

* This example will use the cert from the certStore...
lnSuccess = loEmail.SetSigningCert(loCert)

* Signed email can be sent in two different ways.  
* In a multipart/signed email, the signature is attached as a separate MIME part.
* In an opaque email (signedData) the content of the email is encapsulated within the signature
* and the email is sent as "application/pkcs7-mime". 
* Either should be fine, but some receiving systems might require one or the other..
loMailman.OpaqueSigning = 0

* Send a signed email.
lnSuccess = loMailman.SendEmail(loEmail)
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
ELSE
    * The LastErrorText property provides information
    * even when successful.
    ? loMailman.LastErrorText
    ? "Mail Sent!"
ENDIF

RELEASE loCert

RELEASE loMailman
RELEASE loEmail
RELEASE loCertStore
RELEASE loCert2