Unicode C++
Unicode C++
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 Unicode C++ Downloads
#include <CkMimeW.h>
#include <CkStringBuilderW.h>
#include <CkPfxW.h>
#include <CkCertW.h>
void ChilkatSample(void)
{
bool success = false;
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
CkMimeW mime;
// Create a MIME message to sign.
mime.NewMultipartMixed();
mime.AddHeaderField(L"someHeader1",L"Some value 1");
mime.AddHeaderField(L"someHeader2",L"Some value 2");
CkMimeW part0;
part0.AddHeaderField(L"hdrA",L"Some value A");
part0.AddHeaderField(L"hdrB",L"Some value B");
part0.put_ContentType(L"text/plain");
part0.SetBody(L"This is the plain-text body.");
CkMimeW part1;
part1.AddHeaderField(L"hdrX",L"Some value X");
part1.AddHeaderField(L"hdrY",L"Some value Y");
part1.put_ContentType(L"text/xml");
part1.SetBody(L"<a>This is the XML body</a>");
mime.AppendPart(part0);
mime.AppendPart(part1);
// The MIME to be signed:
CkStringBuilderW sbUnsignedMime;
mime.GetMimeSb(sbUnsignedMime);
wprintf(L"%s\n",sbUnsignedMime.getAsString());
// 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.)
CkPfxW pfx;
success = pfx.LoadPfxFile(L"qa_data/rsassa-pss/privatekey.pfx",L"PFX_PASSWORD");
if (success == false) {
wprintf(L"%s\n",pfx.lastErrorText());
return;
}
// 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.)
CkCertW cert;
success = pfx.CertAt(0,cert);
if (success == false) {
wprintf(L"%s\n",pfx.lastErrorText());
return;
}
// Indicate that RSASSA-PSS with SHA256 should be used.
mime.put_SigningAlg(L"pss");
mime.put_SigningHashAlg(L"sha256");
// Add a detached signature.
success = mime.AddDetachedSignature(cert);
if (success != true) {
wprintf(L"%s\n",mime.lastErrorText());
return;
}
// Show the clear-signed MIME. (see the sample output below)
wprintf(L"-------------------------------------------------------------\n");
wprintf(L"Clear-signed MIME using detached signature:\n");
wprintf(L"-------------------------------------------------------------\n");
wprintf(L"%s\n",mime.getMime());
// Restore the original unsigned MIME, and this time create an opaque signature.
mime.LoadMime(sbUnsignedMime.getAsString());
// Sign using an opaque signature
success = mime.ConvertToSigned(cert);
if (success != true) {
wprintf(L"%s\n",mime.lastErrorText());
return;
}
// Show the opaque-signed MIME. (see the sample output below)
wprintf(L"-------------------------------------------------------------\n");
wprintf(L"Opaque-signed MIME :\n");
wprintf(L"-------------------------------------------------------------\n");
wprintf(L"%s\n",mime.getMime());
wprintf(L"Success.\n");
// -----------------------------------------------
// 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
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// Cmhkclk6IFNvbWUgdmFsdWUgWQ0KQ29udGVudC1UeXBlOiB0ZXh0L3htbA0KDQo8YT5UaGlzIGlz
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//
}