Rust

Load .eml and Decrypt (smime.p7m)

Loads an encrypted email from a .eml file and decrypts using certificate w/ private key found in a .p12 (or .pfx) file.

The Content-Type and Content-Disposition email headers of the email to be decrypted look similar to this:

Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data;
	name="smime.p7m"
Content-Disposition: attachment; filename="smime.p7m"

Rust

let email = chilkat::Email::new();

// Add a PFX (or .p12) to be used for decryption
if email.add_pfx_source_file("myCert.p12", "passwordForP12").is_err() {
    println!("{}", email.last_error_text());
    return;
}

// Loading the .eml automatically decrypts.
if email.load_eml("encrypted.eml").is_err() {
    println!("{}", email.last_error_text());
    return;
}

// The email now exists as it was prior to encryption.
// Your app may access the email's subject, body, attachments,
// etc. using the Chilkat Email API...

// Save the decrypted email:
if email.save_eml("decrypted.eml").is_err() {
    println!("{}", email.last_error_text());
    return;
}

println!("Success.");