Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Delphi ActiveX Examples

ASN.1
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
Facebook
FileAccess
Firebase
GMail REST API
GeoOp
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Google Sheets
Gzip
HTML-to-XML/Text
HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)

Java KeyStore (JKS)
Jira
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
PayPal
Peoplevox
QuickBooks
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Shopify
Socket/SSL/TLS
Spider
Stream
Stripe
SugarCRM
Tar Archive
Twitter
Upload
VoiceBase
Walmart
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Xero
Zip
curl
eBay

 

 

 

(Delphi ActiveX) Add DKIM-Signature Header to MIME / Email

Demonstrates how to add a DKIM-Signature header field to a MIME message.

Note: The DKIM / DomainKey functionality is included with the Chilkat MIME license.

Chilkat for Delphi Downloads

Chilkat ActiveX DLL for Delphi

Chilkat non-ActiveX DLL for Delphi

* The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_v9_5_0_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
dkim: TChilkatDkim;
success: Integer;
password: WideString;
fac: TCkFileAccess;
mimeData: Array of Byte;
dkimSignedMime: Array of Byte;

begin
//  Important: It is helpful to send the contents of the
//  dkim.LastErrorText property when requesting support.

dkim := TChilkatDkim.Create(Self);

//  Any string automatically begins a fully-functional 30-day trial.
success := dkim.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    Memo1.Lines.Add(dkim.LastErrorText);
    Exit;
  end;

//  To create a DKIM signature for email (i.e. MIME),
//  you'll need to provide the following:
//  (1) An RSA private key in any common file format.
//  (2) The domain name (typically the same domain
//  as the sender of an email).
//  (3) A selector for the domain name -- an arbitrary string
//  to identify the matching public key in DNS.

//  To allow an email recipient to verify the DKIM signature via an
//  external email client supporting DKIM or using other software,
//  you will need to create a DNS record with the selector
//  and matching public key.  This example does not provide
//  information about DKIM DNS record creation.
//  (Chilkat does not provide an API for creating DNS records.
//  Creating the DKIM DNS record is something you would do
//  manually.)

//  Set the domain and selector:
//  You'll need to provide your own values here..
dkim.DkimDomain := 'chilkatsoft.com';
dkim.DkimSelector := 'tuna';

//  Load a private key from any common RSA private key
//  format, such as DER, PKCS8, PEM, XML, etc.
//  The LoadDkimPkFile method automatically detects
//  the file format and reads it appropriately.
//  If a password is not required, you'll still need to provide
//  a password string argument, but it is ignored.

password := 'optionalPassword';
success := dkim.LoadDkimPkFile('myPrivateKey.pem',password);
if (success <> 1) then
  begin
    Memo1.Lines.Add(dkim.LastErrorText);
    Exit;
  end;

//  Load a MIME file into a byte array.
fac := TCkFileAccess.Create(Self);

mimeData := fac.ReadEntireFile('testMessage.eml');
if (fac.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(fac.LastErrorText);
    Exit;
  end;

//  Sign it.  This adds the DKIM-Signature header and
//  returns the new MIME with DKIM-Signature added.

dkimSignedMime := dkim.AddDkimSignature(mimeData);
if (dkim.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(dkim.LastErrorText);
    Exit;
  end;

success := fac.WriteEntireFile('dkimSigned.eml',dkimSignedMime);
if (success <> 1) then
  begin
    Memo1.Lines.Add(fac.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Success.');
end;

 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.