(Objective-C) Send Signed and Encrypted EDI Email (EDIFACT)

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

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#import <CkoMailMan.h>
#import <CkoEmail.h>
#import <NSString.h>
#import <CkoCert.h>

// 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.
CkoMailMan *mailman = [[CkoMailMan alloc] init];

//  Create a new email object
CkoEmail *email = 0;

//  Build the basic EDI email where the body is the EDIFACT message:
NSString *ediMsg = @"UNB+IATB:1+6XPPC ...";
NSString *name = @"something";
NSString *filename = @"something";
NSString *charset = @"iso-8859-1";
[email SetEdifactBody: ediMsg name: name filename: filename charset: charset];

email.Subject = @"This is the subject";
email.From = @"Chilkat Admin <admin@chilkatsoft.com>";
BOOL success = [email AddTo: @"Chilkat Support" emailAddress: @"support@chilkatsoft.com"];

//  Indicate that the email should be sent signed.
email.SendSigned = YES;

//  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 = [mailman AddPfxSourceFile: @"/pfx_files/myCertAndPrivateKey.pfx" password: @"secret"];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
    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.
CkoCert *cert = 0;
success = [cert LoadFromFile: @"/certs/recipientCert.cer"];
if (success != YES) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

//  Indicate that the email is to be sent encrypted.
email.SendEncrypted = YES;

//  Indicate that we want 192-bit 3DES encryption:
email.Pkcs7CryptAlg = @"3des";
email.Pkcs7KeyLength = [NSNumber numberWithInt:192];

//  Specify the certificate to be used for encryption.
success = [email SetEncryptCert: cert];

//  Tell the mailman to use an opaque signature (as opposed to a detached signature)
mailman.OpaqueSigning = YES;

//  SMTP server (use your settings and refer to the online
//  reference  documentation for more options)
mailman.SmtpHost = @"smtp.mymailserver.com";
mailman.SmtpUsername = @"myLogin";
mailman.SmtpPassword = @"myPassword";
mailman.SmtpPort = [NSNumber numberWithInt:587];
mailman.StartTLS = YES;

//  Send the signed/encrypted EDI email
success = [mailman SendEmail: email];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
}
else {
    NSLog(@"%@",@"Mail Sent!");
}