C#

PKCS7 Encrypt MIME

See more MIME Examples

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

bool success = false;

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

Chilkat.Mime mime = new Chilkat.Mime();

//  Build a simple MIME message to be encrypted:
success = 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.)

Chilkat.Cert cert = new Chilkat.Cert();
success = cert.LoadFromFile("myCert.cer");
if (success == false) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

//  Encrypt the MIME:
success = mime.Encrypt(cert);
if (success == false) {
    Debug.WriteLine(mime.LastErrorText);
    return;
}

//  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==