Delphi DLL

Load Signed and/or Encrypted Email and Unwrap Security Layers

See more Email Object Examples

The LoadEml method loads an email (.eml file containing the MIME of an email) and automatically unwraps the digital signature and encryption security layers. A program can then examine the properties of the email object to see what was unwrapped. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Email;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
email: HCkEmail;

begin
success := False;

email := CkEmail_Create();

// Provide PFX/.p12 files for any certs+keys needed for decryption.
// Signature verification does not need anything extra.  
// (Also, Chilkat will automatically find and use pre-installed certs + private keys needed for decryption
// on a Windows system.)
success := CkEmail_AddPfxSourceFile(email,'/pfxFiles/certs_and_keys_1.pfx','pfxPassword1');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;
success := CkEmail_AddPfxSourceFile(email,'/pfxFiles/certs_and_keys_2.pfx','pfxPassword2');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;
// ...

// Load a potentially signed and/or encrypted email.
success := CkEmail_LoadEml(email,'someDir/someEmail.eml');

// If the email was signed and/or encrypted, it was "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 (CkEmail_getReceivedEncrypted(email) = True) then
  begin

    Memo1.Lines.Add('This email was encrypted.');
    if (CkEmail_getDecrypted(email) = True) then
      begin
        Memo1.Lines.Add('This email was successfully decrypted.  It was encrypted by:');
        Memo1.Lines.Add(CkEmail__encryptedBy(email));
      end
    else
      begin
        Memo1.Lines.Add('This email was not decrypted.');
      end;
  end;
if (CkEmail_getReceivedSigned(email) = True) then
  begin

    Memo1.Lines.Add('This email was signed.');
    if (CkEmail_getSignaturesValid(email) = True) then
      begin
        Memo1.Lines.Add('The signature was verified.  It was signed by:');
        Memo1.Lines.Add(CkEmail__signedBy(email));
      end
    else
      begin
        Memo1.Lines.Add('The signature verification failed.');
      end;
  end;

// At this point, the contents of the email, including attachments, can be accessed normally..

CkEmail_Dispose(email);

end;