Delphi DLL
Delphi DLL
Sign MIME using RSASSA-PSS with SHA256
See more MIME Examples
Demonstrates how to sign an MIME using the RSASSA-PSS signing algorithm with the SHA256 hash algorithm.Chilkat Delphi DLL Downloads
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Mime, StringBuilder, Pfx, Cert;
...
procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
mime: HCkMime;
part0: HCkMime;
part1: HCkMime;
sbUnsignedMime: HCkStringBuilder;
pfx: HCkPfx;
cert: HCkCert;
begin
success := False;
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
mime := CkMime_Create();
// Create a MIME message to sign.
CkMime_NewMultipartMixed(mime);
CkMime_AddHeaderField(mime,'someHeader1','Some value 1');
CkMime_AddHeaderField(mime,'someHeader2','Some value 2');
part0 := CkMime_Create();
CkMime_AddHeaderField(part0,'hdrA','Some value A');
CkMime_AddHeaderField(part0,'hdrB','Some value B');
CkMime_putContentType(part0,'text/plain');
CkMime_SetBody(part0,'This is the plain-text body.');
part1 := CkMime_Create();
CkMime_AddHeaderField(part1,'hdrX','Some value X');
CkMime_AddHeaderField(part1,'hdrY','Some value Y');
CkMime_putContentType(part1,'text/xml');
CkMime_SetBody(part1,'<a>This is the XML body</a>');
CkMime_AppendPart(mime,part0);
CkMime_AppendPart(mime,part1);
// The MIME to be signed:
sbUnsignedMime := CkStringBuilder_Create();
CkMime_GetMimeSb(mime,sbUnsignedMime);
Memo1.Lines.Add(CkStringBuilder__getAsString(sbUnsignedMime));
// Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
// someHeader1: Some value 1
// someHeader2: Some value 2
//
// --------------080303020600020604010008
// hdrA: Some value A
// hdrB: Some value B
// Content-Type: text/plain
//
// This is the plain-text body.
// --------------080303020600020604010008
// hdrX: Some value X
// hdrY: Some value Y
// Content-Type: text/xml
//
// <a>This is the XML body</a>
// --------------080303020600020604010008--
//
// Get a digital certificate with private key from a .pfx
// (Chilkat has many different ways to provide a cert + private key for siging.
// Using a PFX is just one possible option.)
pfx := CkPfx_Create();
success := CkPfx_LoadPfxFile(pfx,'qa_data/rsassa-pss/privatekey.pfx','PFX_PASSWORD');
if (success = False) then
begin
Memo1.Lines.Add(CkPfx__lastErrorText(pfx));
Exit;
end;
// Get the certificate to be used for signing.
// (The typical case for a PFX is that it contains a cert with an associated private key,
// as well as other certificates in the chain of authentication. The cert with the private
// key should be in the first position at index 0.)
cert := CkCert_Create();
success := CkPfx_CertAt(pfx,0,cert);
if (success = False) then
begin
Memo1.Lines.Add(CkPfx__lastErrorText(pfx));
Exit;
end;
// Indicate that RSASSA-PSS with SHA256 should be used.
CkMime_putSigningAlg(mime,'pss');
CkMime_putSigningHashAlg(mime,'sha256');
// Add a detached signature.
success := CkMime_AddDetachedSignature(mime,cert);
if (success <> True) then
begin
Memo1.Lines.Add(CkMime__lastErrorText(mime));
Exit;
end;
// Show the clear-signed MIME. (see the sample output below)
Memo1.Lines.Add('-------------------------------------------------------------');
Memo1.Lines.Add('Clear-signed MIME using detached signature:');
Memo1.Lines.Add('-------------------------------------------------------------');
Memo1.Lines.Add(CkMime__getMime(mime));
// Restore the original unsigned MIME, and this time create an opaque signature.
CkMime_LoadMime(mime,CkStringBuilder__getAsString(sbUnsignedMime));
// Sign using an opaque signature
success := CkMime_ConvertToSigned(mime,cert);
if (success <> True) then
begin
Memo1.Lines.Add(CkMime__lastErrorText(mime));
Exit;
end;
// Show the opaque-signed MIME. (see the sample output below)
Memo1.Lines.Add('-------------------------------------------------------------');
Memo1.Lines.Add('Opaque-signed MIME :');
Memo1.Lines.Add('-------------------------------------------------------------');
Memo1.Lines.Add(CkMime__getMime(mime));
Memo1.Lines.Add('Success.');
// -----------------------------------------------
// This is sample output for the clear-signed MIME:
// -----------------------------------------------
//
// Content-Type: multipart/signed; boundary="----=_NextPart_672_c95a_97b64c9a.90b5204d";
// protocol="application/x-pkcs7-signature";
// micalg=sha256
//
// ------=_NextPart_672_c95a_97b64c9a.90b5204d
// Content-Type: multipart/mixed; boundary="------------030207090102000301050504"
// someHeader1: Some value 1
// someHeader2: Some value 2
//
// --------------030207090102000301050504
// hdrA: Some value A
// hdrB: Some value B
// Content-Type: text/plain
//
// This is the plain-text body.
// --------------030207090102000301050504
// hdrX: Some value X
// hdrY: Some value Y
// Content-Type: text/xml
//
// <a>This is the XML body</a>
// --------------030207090102000301050504--
//
// ------=_NextPart_672_c95a_97b64c9a.90b5204d
// Content-Transfer-Encoding: base64
// Content-Type: application/x-pkcs7-signature; name="smime.p7s"
// Content-Disposition: attachment; filename="smime.p7s"
//
// MIIG5wYJKoZIhvcNAQcCoIIG2DCCBtQCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
// ggL4MIIC9DCCAl2gAwIBAgIJAMPsJCT11cniMA0GCSqGSIb3DQEBCwUAMIGSMQswCQYDVQQGEwJB
// VTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJu
// ZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWlu
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// neC8qw==
//
// ------=_NextPart_672_c95a_97b64c9a.90b5204d--
//
// -----------------------------------------------
// This is sample output for the opaque-signed MIME:
// -----------------------------------------------
// Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="signed-data"
// someHeader1: Some value 1
// someHeader2: Some value 2
// Content-Disposition: attachment; filename="smime.p7m"
// Content-Transfer-Encoding: base64
//
// MIIItAYJKoZIhvcNAQcCoIIIpTCCCKECAQExDzANBglghkgBZQMEAgEFADCCAdYGCSqGSIb3DQEH
// AaCCAccEggHDQ29udGVudC1UeXBlOiBtdWx0aXBhcnQvbWl4ZWQ7IGJvdW5kYXJ5PSItLS0tLS0t
// LS0tLS0wMDA2MDcwNzA3MDcwMTA1MDAwMTA5MDciDQpzb21lSGVhZGVyMTogU29tZSB2YWx1ZSAx
// DQpzb21lSGVhZGVyMjogU29tZSB2YWx1ZSAyDQoNCi0tLS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3
// MDEwNTAwMDEwOTA3DQpoZHJBOiBTb21lIHZhbHVlIEENCmhkckI6IFNvbWUgdmFsdWUgQg0KQ29u
// dGVudC1UeXBlOiB0ZXh0L3BsYWluDQoNClRoaXMgaXMgdGhlIHBsYWluLXRleHQgYm9keS4NCi0t
// LS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3DQpoZHJYOiBTb21lIHZhbHVlIFgN
// Cmhkclk6IFNvbWUgdmFsdWUgWQ0KQ29udGVudC1UeXBlOiB0ZXh0L3htbA0KDQo8YT5UaGlzIGlz
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// LS0NCqCCAvgwggL0MIICXaADAgECAgkAw+wkJPXVyeIwDQYJKoZIhvcNAQELBQAwgZIxCzAJBgNV
// BAYTAkFVMREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJ
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// /QTfrLOuzXKy
//
CkMime_Dispose(mime);
CkMime_Dispose(part0);
CkMime_Dispose(part1);
CkStringBuilder_Dispose(sbUnsignedMime);
CkPfx_Dispose(pfx);
CkCert_Dispose(cert);
end;