(Objective-C) Find Certificate for Email Encryption

Demonstrates finding the recipient's certificate in the Windows certificate store and using it to send encrypted 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.

BOOL success;
CkoMailMan *mailman = [[CkoMailMan alloc] init];

// Set the SMTP server.
mailman.SmtpHost = @"smtp.example.com";

// Create a new email object
CkoEmail *email = [[CkoEmail alloc] init];

email.Subject = @"This email is encrypted";
email.Body = @"This is a digitally encrypted mail";
email.From = @"Joe <joe@example.com>";
// Emails are encrypted using the recipient's certificate.
NSString *recipientEmailAddr = @"jane@example2.com";
[email AddTo: @"Jane" emailAddress: recipientEmailAddr];

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

// This example demonstrates finding the email encryption certificate
// on a Windows system where the certificate is stored in the Windows 
// certificate store.

CkoCert *cert = [[CkoCert alloc] init];
// The recipient's certificate is used to encrypt.
// (Because the recipient is the only one in possession of the private key to decrypt.)
success = [cert LoadByEmailAddress: recipientEmailAddr];
if (success != YES) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

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

success = [mailman SendEmail: email];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
}
else {
    NSLog(@"%@",@"Encrypted Mail Sent!");
}