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(Delphi ActiveX) IMAP Download and Verify Signed (S/MIME) EmailDemonstrates how to download and verify digitally signed S/MIME email. Note: This example requires Chilkat v11.0.0 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var success: Integer; imap: TChilkatImap; fetchUids: Integer; messageSet: TMessageSet; email: TChilkatEmail; cert: TChilkatCert; i: Integer; uid: WideString; begin success := 0; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. imap := TChilkatImap.Create(Self); // Connect to an IMAP server. // Use TLS imap.Ssl := 1; imap.Port := 993; success := imap.Connect('imap.example.com'); if (success = 0) then begin Memo1.Lines.Add(imap.LastErrorText); Exit; end; success := imap.Login('myLogin','myPassword'); if (success = 0) then begin Memo1.Lines.Add(imap.LastErrorText); Exit; end; // Select an IMAP mailbox success := imap.SelectMailbox('Inbox'); if (success = 0) then begin Memo1.Lines.Add(imap.LastErrorText); Exit; end; // We can choose to fetch UIDs or sequence numbers. fetchUids := 1; // Get the message IDs of all the emails in the mailbox messageSet := TMessageSet.Create(Self); success := imap.QueryMbx('ALL',fetchUids,messageSet.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(imap.LastErrorText); Exit; end; email := TChilkatEmail.Create(Self); cert := TChilkatCert.Create(Self); i := 0; while i < messageSet.Count do begin uid := messageSet.GetId(i); Memo1.Lines.Add('uid: ' + uid); success := imap.FetchEmail(0,uid,1,email.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(imap.LastErrorText); Exit; end; // The security layers of signed and/or encrypted emails // are automatically "unwrapped" when loaded into // a Chilkat email object. // An application only needs to check to see if an email // was received signed or encrypted, and then examine // the success/failure. For example: if (email.ReceivedSigned = 1) then begin Memo1.Lines.Add('This email was signed.'); // Check to see if the signatures were verified. if (email.SignaturesValid = 1) then begin Memo1.Lines.Add('Digital signature(s) verified.'); Memo1.Lines.Add('Signer: ' + email.SignedBy); // Get the certificate used for signing. success := email.LastSignerCert(0,cert.ControlInterface); if (success = 0) then begin Memo1.Lines.Add('Failed to get signing certificate object.'); end else begin Memo1.Lines.Add('Signing cert: ' + cert.SubjectCN); end; end else begin Memo1.Lines.Add('Digital signature verification failed.'); end; end; i := i + 1; end; // Disconnect from the IMAP server. success := imap.Disconnect(); end; |
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