Xbase++

Send Encrypted Email with a Selected Algorithm (AES, 3DES, etc.)

Sends an encrypted email using the recipient's digital certificate from a .cer file, and chooses 3DES for the encryption algorithm. (It is also possible to send AES encrypted email w/ 128-bit, 192-bit, or 256-bit encryption simply by setting the Pkcs7CryptAlg and Pkcs7KeyLength properties.) Xbase++

LOCAL nSuccess
LOCAL oMailman
LOCAL oCert
LOCAL oEmail

nSuccess := 0

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

//  Set the SMTP server.
oMailman:SmtpHost := "smtp.mymailserver.com"

//  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.
oCert := CreateObject("Chilkat.Cert")
nSuccess := oCert:LoadFromFile("cknotes.cer")
IF (nSuccess != 1)
    ? oCert:LastErrorText
    oMailman:destroy()
    oCert:destroy()
    RETURN
ENDIF

//  Create a new email object
oEmail := CreateObject("Chilkat.Email")

oEmail:Subject := "This email is encrypted"
oEmail:Body := "This is a digitally encrypted mail"
oEmail:From := "Chilkat Support <support@chilkatsoft.com>"
nSuccess := oEmail:AddTo("Chilkat Blog", "admin@cknotes.com")

//  Indicate that the email is to be sent encrypted.
oEmail:SendEncrypted := 1

//  Specify the certificate to be used for encryption.
nSuccess := oEmail:SetEncryptCert(oCert)

//  If desired, specify the encryption algorithm to be used.
//  The Pkcs7CryptAlg property can be set to "aes", "des", "3des", or "rc2"
oEmail:Pkcs7CryptAlg := "3des"

//  If desired, set the key length (in bits) for the encryption algorithm:
//  The possible values allowed depend on the Pkcs7CryptAlg property. 
//  For "aes", the key length may be 128, 192, or 256. 
//  For "3des" the key length must be 192. 
//  For "des" the key length must be 40. 
//  For "rc2" the key length can be 40, 56, 64, or 128.
oEmail:Pkcs7KeyLength := 192

nSuccess := oMailman:SendEmail(oEmail)
IF (nSuccess != 1)
    ? oMailman:LastErrorText
ELSE
    ? "Mail Sent!"
ENDIF

oMailman:destroy()
oCert:destroy()
oEmail:destroy()