PHP Requires Chilkat v11.0.0+
Chilkat2 PHP
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 PHP Downloads
<?php
use Chilkat2\Cert;
use Chilkat2\Mime;
use Chilkat2\Pfx;
use Chilkat2\StringBuilder;
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
$mime = new Mime();
// Create a MIME message to sign.
$mime->NewMultipartMixed();
$mime->AddHeaderField('someHeader1', 'Some value 1');
$mime->AddHeaderField('someHeader2', 'Some value 2');
$part0 = new Mime();
$part0->AddHeaderField('hdrA', 'Some value A');
$part0->AddHeaderField('hdrB', 'Some value B');
$part0->ContentType = 'text/plain';
$part0->SetBody('This is the plain-text body.');
$part1 = new Mime();
$part1->AddHeaderField('hdrX', 'Some value X');
$part1->AddHeaderField('hdrY', 'Some value Y');
$part1->ContentType = 'text/xml';
$part1->SetBody('<a>This is the XML body</a>');
$mime->AppendPart($part0);
$mime->AppendPart($part1);
// The MIME to be signed:
$sbUnsignedMime = new StringBuilder();
$mime->GetMimeSb($sbUnsignedMime);
echo $sbUnsignedMime->GetAsString(), "\n";
// 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 = new Pfx();
try {
$pfx->LoadPfxFile('qa_data/rsassa-pss/privatekey.pfx', 'PFX_PASSWORD');
// 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 = new Cert();
$pfx->CertAt(0, $cert);
// Indicate that RSASSA-PSS with SHA256 should be used.
$mime->SigningAlg = 'pss';
$mime->SigningHashAlg = 'sha256';
// Add a detached signature.
$mime->AddDetachedSignature($cert);
} catch (\Chilkat2\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
// Show the clear-signed MIME. (see the sample output below)
echo "-------------------------------------------------------------\n";
echo "Clear-signed MIME using detached signature:\n";
echo "-------------------------------------------------------------\n";
echo $mime->GetMime(), "\n";
// Restore the original unsigned MIME, and this time create an opaque signature.
$mime->LoadMime($sbUnsignedMime->GetAsString());
// Sign using an opaque signature
try {
$mime->ConvertToSigned($cert);
} catch (\Chilkat2\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
// Show the opaque-signed MIME. (see the sample output below)
echo "-------------------------------------------------------------\n";
echo "Opaque-signed MIME :\n";
echo "-------------------------------------------------------------\n";
echo $mime->GetMime(), "\n";
echo "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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//