Rust

PKCS7 Encrypt MIME

See more MIME Examples

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

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

let mime = chilkat::Mime::new();

// Build a simple MIME message to be encrypted:
let _ = mime.add_header_field("Content-Type", "text/plain").is_ok();
let _ = mime.add_header_field("abc", "123").is_ok();
mime.set_body("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.)

let cert = chilkat::Cert::new();
if cert.load_from_file("myCert.cer").is_err() {
    println!("{}", cert.last_error_text());
    return;
}

// Encrypt the MIME:
if mime.encrypt(&cert).is_err() {
    println!("{}", mime.last_error_text());
    return;
}

// Display the MIME:
println!("{}", mime.get_mime().unwrap_or_default());

// 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==