Managed C++/CLI - Verify digital signature and decrypt email - S/MIME¶

#include "stdafx.h"

using namespace System;
using namespace System::Text;
using namespace System::IO;
using namespace EAGetMail; //add EAGetMail namespace
using namespace System::Security::Cryptography::X509Certificates;

void ParseEmail(String ^emlFile)
{
    Mail ^oMail = gcnew Mail("TryIt");
    oMail->Load(emlFile, false);

    if (oMail->IsEncrypted)
    {
        try
        {
            // this email is encrypted, we decrypt it by user default certificate.
            // you can also use specified certificate like this
            /* X509Certificate2 ^decryptCert = gcnew X509Certificate2("D:\\mycert\\test.pfx",
            "nosecret",
            X509KeyStorageFlags::Exportable | X509KeyStorageFlags::UserKeySet);
            oMail->DecryptMessage(decryptCert);
            */

            oMail->DecryptMessage(nullptr);
        }
        catch (Exception ^ep)
        {
            Console::WriteLine(ep->Message);
        }
    }

    if (oMail.IsSigned)
    {
        try
        {
            // This email is digital signed.
            X509Certificate2 ^signerCert = oMail->VerifyMessageSignature();
            Console::WriteLine("This email contains a valid digital signature.");

            // You can add the certificate to your certificate storage like this
            /*
            X509Store ^store = gcnew X509Store("My", StoreLocation::CurrentUser);
            store->Open(OpenFlags::ReadWrite);
            store->Add(signerCert);
            store->Close();
            */
            // then you can use send the encrypted email back to this sender.
        }
        catch (Exception ^ep)
        {
            Console::WriteLine(ep->Message);
        }
    }

    // Parse Mail From/Sender
    Console::WriteLine("From: {0}", oMail->From->ToString());

    // Parse Mail To/Recipient
    array<MailAddress^> ^addrs = oMail->To;
    for (int i = 0; i < addrs->Length; i++)
    {
        Console::WriteLine("To: {0}", addrs[i]->ToString());
    }

    // Parse Mail CC
    addrs = oMail->Cc;
    for (int i = 0; i < addrs->Length; i++)
    {
        Console::WriteLine("To: {0}", addrs[i]->ToString());
    }

    // Parse Mail Subject
    Console::WriteLine("Subject: {0}", oMail->Subject);

    // Parse Mail Text/Plain body
    Console::WriteLine("TextBody: {0}", oMail->TextBody);

    // Parse Mail Html Body
    Console::WriteLine("HtmlBody: {0}", oMail->HtmlBody);

    // Parse Attachments
    array<Attachment^> ^atts = oMail->Attachments;
    for (int i = 0; i < atts->Length; i++)
    {
        Console::WriteLine("Attachment: {0}", atts[i]->Name);
    }
}

int main(array<System::String ^> ^args)
{
    try
    {
        ParseEmail("c:\\my folder\\test.eml");
    }
    catch (Exception ^ep)
    {
        Console::WriteLine(ep->Message);
    }

    return 0;
}