VB.NET

Send Signed and Encrypted EDI Email (EDIFACT)

Demonstrates how to send a signed and encrypted EDI email (EDIFACT email). VB.NET

Dim success As Boolean = False

' 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.
Dim mailman As New Chilkat.MailMan

'  Create a new email object
Dim email As Chilkat.Email

'  Build the basic EDI email where the body is the EDIFACT message:
Dim ediMsg As String = "UNB+IATB:1+6XPPC ..."
Dim name As String = "something"
Dim filename As String = "something"
Dim charset As String = "iso-8859-1"
email.SetEdifactBody(ediMsg,name,filename,charset)

email.Subject = "This is the subject"
email.From = "Chilkat Admin <admin@chilkatsoft.com>"
success = email.AddTo("Chilkat Support","support@chilkatsoft.com")

'  Indicate that the email should be sent signed.
email.SendSigned = True

'  Tell the mailman to use a PFX file as a source for locating
'  the certificate and private key required for signing.
'  The certificate chosen for signing will be the one that
'  matches the sender's email address, which also has
'  a private key.  All intermediate certs in the chain of
'  authentication, up to and including the root, will
'  be included in the signature.
success = mailman.AddPfxSourceFile("/pfx_files/myCertAndPrivateKey.pfx","secret")
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


'  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.
Dim cert As Chilkat.Cert
success = cert.LoadFromFile("/certs/recipientCert.cer")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


'  Indicate that the email is to be sent encrypted.
email.SendEncrypted = True

'  Indicate that we want 192-bit 3DES encryption:
email.Pkcs7CryptAlg = "3des"
email.Pkcs7KeyLength = 192

'  Specify the certificate to be used for encryption.
success = email.SetEncryptCert(cert)

'  Tell the mailman to use an opaque signature (as opposed to a detached signature)
mailman.OpaqueSigning = True

'  SMTP server (use your settings and refer to the online
'  reference  documentation for more options)
mailman.SmtpHost = "smtp.mymailserver.com"
mailman.SmtpUsername = "myLogin"
mailman.SmtpPassword = "myPassword"
mailman.SmtpPort = 587
mailman.StartTLS = True

'  Send the signed/encrypted EDI email
success = mailman.SendEmail(email)
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
Else
    Debug.WriteLine("Mail Sent!")
End If