POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted email.

Download Chilkat Email ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATMAILLib2_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan2;
success: Integer;
bundle: CHILKATMAILLib2_TLB.IChilkatEmailBundle2;
i: Integer;
email: CHILKATMAILLib2_TLB.IChilkatEmail2;

begin
//  The mailman object is used for receiving (POP3)
//  and sending (SMTP) email.
mailman := TChilkatMailMan2.Create(Self);

//  Any string argument automatically begins the 30-day trial.
success := mailman.UnlockComponent('30-day trial');
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

//  Set the POP3 server's hostname
mailman.MailHost := 'mail.chilkatsoft.com';

//  Set the POP3 login/password.
mailman.PopUsername := 'myLogin';
mailman.PopPassword := 'myPassword';

//  If running on Microsoft Windows, the Chilkat mailman
//  will automatically search the registry-based certificate stores
//  for matching certificates and private keys required for
//  decryption.  However, on Linux, MAX OS X, and other
//  operating systems, no such thing exists.  Therefore, you'll
//  need to specify one or more PFX (.p12 / .pfx) files as
//  sources for locating the certs required for decyrption.
success := mailman.AddPfxSourceFile('/pfxFiles/certs_and_keys_1.pfx','pfxPassword1');
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;
success := mailman.AddPfxSourceFile('/pfxFiles/certs_and_keys_2.pfx','pfxPassword2');
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;
//  ...
//  Note: On MS Windows, it is not required to provide PFX sources
//  if the needed certs and private keys are already installed
//  on the system (in the registry-based certificate stores).

//  Copy the all email from the user's POP3 mailbox
//  into a bundle object.  The email remains on the server.
bundle := mailman.CopyMail();
if (bundle = nil ) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

//  S/MIME security envelopes are automatically "unwrapped"
//  when a message is retrieved from the server. Signed emails are automatically verified, and
//  encrypted emails are automatically decrypted, restoring the email to the original state before
//  signing and/or encrypting. Information about the signing and encrypting certificates can be
//  retrieved from the Email object (methods: GetSignedByCert, GetEncryptedByCert;
//  properties: SignedBy, EncryptedBy, SignaturesValid, Decrypted, ReceivedSigned,
//  ReceivedEncrypted).

//  Loop over the bundle,

for i := 0 to bundle.MessageCount - 1 do
  begin

    email := bundle.GetEmail(i) As CHILKATMAILLib2_TLB.IChilkatEmail2;

    Memo1.Lines.Add(email.From);
    Memo1.Lines.Add(email.Subject);

    //  At this point, if the email was signed and/or encrypted, it is already "unwrapped", i.e.
    //  the email is already decrypted and in a state as if it were never signed or encrypted.
    //  You may check to see if the email was received encrypted or signed, and if so,
    //  whether it was successfully unwrapped and who signed or encrypted it:
    if (email.ReceivedEncrypted = 1) then
      begin

        Memo1.Lines.Add('This email was encrypted when received.');
        if (email.Decrypted = 1) then
          begin
            Memo1.Lines.Add('This email was successfully decrypted.  It was encrypted by:');
            Memo1.Lines.Add(email.EncryptedBy);
          end
        else
          begin
            Memo1.Lines.Add('This email was not decrypted.');
          end;
      end;
    if (email.ReceivedSigned = 1) then
      begin

        Memo1.Lines.Add('This email was signed when received.');
        if (email.SignaturesValid = 1) then
          begin
            Memo1.Lines.Add('The signature was verified.  It was signed by:');
            Memo1.Lines.Add(email.SignedBy);
          end
        else
          begin
            Memo1.Lines.Add('The signature verification failed.');
          end;
      end;

    //  The email's body, HTML body, attachments, etc.
    //  are decrypted and available just like any non-encrypted email.

    Memo1.Lines.Add('--');

  end;


end;