(VB.NET) PKCS7 Encrypt MIME

Encrypt MIME using a digital certificate to create PKCS7 encrypted S/MIME.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim mime As New Chilkat.Mime

' Build a simple MIME message to be encrypted:
Dim success As Boolean = mime.AddHeaderField("Content-Type","text/plain")
success = mime.AddHeaderField("abc","123")
mime.SetBody("This is a test")

' A digital certificate is required to create PKCS7 encrypted MIME.
' It can come from a variety of sources: .cer file, .pfx file, PEM files,
' an in-memory representation, or directly from a Windows
' registry-based certificate store.

' This example will load a certificate object from a .cer file.
' Note: Only the public-key is required to encrypt.  (Decryption
' requires a private key.)

Dim cert As New Chilkat.Cert
success = cert.LoadFromFile("myCert.cer")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Encrypt the MIME:
success = mime.Encrypt(cert)
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


' Display the MIME:
Debug.WriteLine(mime.GetMime())

' The resulting S/MIME looks something like this:

' abc: 123
' Content-Disposition: attachment; filename="smime.p7m"
' Content-Transfer-Encoding: base64
' Content-Type: application/x-pkcs7-mime;
'  name="smime.p7m"
' 
' MIICAQYJKoZIhvcNAQcDoIIB8jCCAe4CAQAxggGFMIIBgQIBADBpMFUxCzAJBgNVBAYTAlpBMSUw
' IwYDVQQKExxUaGF3dGUgQ29uc3VsdGluZyAoUHR5KSBMdGQuMR8wHQYDVQQDExZUaGF3dGUgQ29k
' ZSBTaWduaW5nIENBAhB4ouTcAmLszrGi170k1deSMA0GCSqGSIb3DQEBAQUABIIBABz59iwVufLZ
' QIPs0whUYMtBjIQxg5IOCxpoKJeJmLVzu9Q5Q1poxG9uYOveybS9c4wbl5A0DFfKTW5O4HhHcOHW
' TgcH4iqdwhiFWm/q9d5rjceJWBFQsGOcgoXSU/U2Xp+N47/+Pqyc5XJbxKnOc4YhPzO320JZsNB6
' p1NGk5SNnWqgbUDmEnfH8ZPHSV7dNi2aiFALYTyLjyp0lqJCsdZ524OPTZFfusrl/9ibPAW7jKuI
' FgDCcBtRJvolVF8iIHxaTw4rhk0qb1KWzxvB5j9HSLdyIKIPhZbxeS10bx18YkSsBlKfdKRalQag
' 3oWSRdsK9/N75YHG8Pm+x9BOHUAwYAYJKoZIhvcNAQcBMBkGCCqGSIb3DQMCMA0CAToECAb+toBW
' txZigDhGZKSpUpuTiWvvSMemX/c79sSnMpuefVwGKFTDgXVLE2SoD5a9Yh5vcG7Mhl2IkilVwOMc
' fi23+g==