Zig

Send Signed and Encrypted EDI Email (EDIFACT)

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

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    var success: bool = 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.
    const mailman = try chilkat.MailMan.init();
    defer mailman.deinit();

    //  Create a new email object
    const email = try chilkat.Email.init();
    defer email.deinit();

    //  Build the basic EDI email where the body is the EDIFACT message:
    const edi_msg = "UNB+IATB:1+6XPPC ...";
    const name = "something";
    const filename = "something";
    const charset = "iso-8859-1";
    email.setEdifactBody(edi_msg, name, filename, charset);

    email.setSubject("This is the subject");
    email.setFrom("Chilkat Admin <admin@chilkatsoft.com>");
    success = if (email.addTo("Chilkat Support", "support@chilkatsoft.com")) true else |_| false;

    //  Indicate that the email should be sent signed.
    email.setSendSigned(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 = if (mailman.addPfxSourceFile("/pfx_files/myCertAndPrivateKey.pfx", "secret")) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try mailman.getLastErrorText(alloc)});
        return;
    }

    //  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.
    const cert = try chilkat.Cert.init();
    defer cert.deinit();
    success = if (cert.loadFromFile("/certs/recipientCert.cer")) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    }

    //  Indicate that the email is to be sent encrypted.
    email.setSendEncrypted(true);

    //  Indicate that we want 192-bit 3DES encryption:
    email.setPkcs7CryptAlg("3des");
    email.setPkcs7KeyLength(192);

    //  Specify the certificate to be used for encryption.
    success = if (email.setEncryptCert(cert)) true else |_| false;

    //  Tell the mailman to use an opaque signature (as opposed to a detached signature)
    mailman.setOpaqueSigning(true);

    //  SMTP server (use your settings and refer to the online
    //  reference  documentation for more options)
    mailman.setSmtpHost("smtp.mymailserver.com");
    mailman.setSmtpUsername("myLogin");
    mailman.setSmtpPassword("myPassword");
    mailman.setSmtpPort(587);
    mailman.setStartTLS(true);

    //  Send the signed/encrypted EDI email
    success = if (mailman.sendEmail(email)) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try mailman.getLastErrorText(alloc)});
    } else {
        std.debug.print("Mail Sent!\n", .{});
    }
}