PHP Requires Chilkat v11.0.0+

Send a Signed Email using RSASSA-PSS with SHA256

See more SMTP Examples

Demonstrates how to sign and send an email using the RSASSA-PSS signing algorithm with the SHA256 hash algorithm. . Chilkat2 PHP

<?php

use Chilkat2\Cert;
use Chilkat2\Email;
use Chilkat2\MailMan;
use Chilkat2\Pfx;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// 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');

    $email = new Email();

    // Create a simple email.
    $email->Subject = 'Sample RSASSA-PSS Signed Email';
    $email->Body = 'Sample RSASSA-PSS Signed Email';
    $email->From = 'from_name@mydomain.com';
    // Add one ore more recipients..
    $email->AddTo('Chilkat Support', 'support@chilkatsoft.com');
    $email->AddTo('Chilkat GMail', 'chilkat.support@gmail.com');

    // Indicate that the email is to be signed, and that we want to use RSASSA-PSS.
    $email->SendSigned = true;
    $email->SigningAlg = 'pss';
    $email->SigningHashAlg = 'sha256';

    // 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);

    // Tell the email object to use this cert (and private key) for signing.
    $email->SetSigningCert($cert);

    $mailman = new MailMan();

    // Set the SMTP settings for your email account on your mail server.
    $mailman->SmtpUsername = 'SMTP_LOGIN';
    $mailman->SmtpPassword = 'SMTP_PASSWORD';
    $mailman->SmtpHost = 'MY_SMTP_DOMAIN_OR_IP';
    $mailman->SmtpPort = 587;
    $mailman->StartTLS = true;

    // Signed email can be sent in two different ways.
    // In a multipart/signed email, the signature is attached as a separate MIME part.
    // In an opaque email (signedData) the content of the email is encapsulated within the signature
    // and the email is sent as "application/pkcs7-mime".
    // Either should be fine, but some receiving systems might require one or the other..
    $mailman->OpaqueSigning = false;

    // Send the email.  The mailman will sign the email as directed by the
    // property settings of the email object.
    $mailman->SendEmail($email);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

try {
    $mailman->CloseSmtpConnection();
} catch (\Chilkat2\Exception $e) {
    echo "Connection to SMTP server not closed cleanly.\n";
}

echo "Mail Sent!\n";

// -----------------------------------------------------------
// This is the MIME of the RSASSA-PSS signed email that was sent

//     MIME-Version: 1.0
//     Date: Thu, 20 Apr 2017 10:14:58 -0500
//     Message-ID: <3682A87344CB3A4FB5EB5BC9908C0C4DA01DA461@CHILKAT13>
//     Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha256;
//      boundary="------------050103020705000601010800"
//     X-Priority: 3 (Normal)
//     Subject: Sample RSASSA-PSS Signed Email
//     From: support@chilkatsoft.com
//     To: "Chilkat Support" <support@chilkatsoft.com>,
//      "Chilkat GMail" <chilkat.support@gmail.com>
//
//     --------------050103020705000601010800
//     Content-Type: text/plain; format=flowed
//     Content-Transfer-Encoding: 7bit
//
//     Sample RSASSA-PSS Signed Email
//     --------------050103020705000601010800
//     Content-Transfer-Encoding: base64
//     Content-Type: application/pkcs7-signature; name="smime.p7s"
//     Content-Disposition: attachment; filename="smime.p7s"
//
//     MIIG5wYJKoZIhvcNAQcCoIIG2DCCBtQCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
//     ggL4MIIC9DCCAl2gAwIBAgIJAMPsJCT11cniMA0GCSqGSIb3DQEBCwUAMIGSMQswCQYDVQQGEwJB
//     VTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJu
//     ZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWlu
//     QGludGVybmV0d2lkZ2V0cy5jb20wHhcNMTYxMTAxMTY1MjMyWhcNMjExMDMxMTY1MjMyWjCBkjEL
//     MAkGA1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNV
//     BAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcN
//     AQkBFhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB
//     gQDGIdoCjyavs+F/Rm0VIB4m6O7VL1j+1IqieoR9NEX2GQvu2VCdceyxf9qaw1bxipEvjLwUkw7M
//     e+BTlLpWQbBMH87s6KpsC8MVyXhMLpP0oM8NFix/vLz2wdLhUh7CZvJA0plqkJk9bj57QIu+EO1k
//     tUHM2DFb6sckvCL2yybD1wIDAQABo1AwTjAdBgNVHQ4EFgQUONKKu2zsXIrinWxIGT654vrcQwsw
//     HwYDVR0jBBgwFoAUONKKu2zsXIrinWxIGT654vrcQwswDAYDVR0TBAUwAwEB/zANBgkqhkiG9w0B
//     AQsFAAOBgQArFvdi5u9i2QF1Qw+cdC1l7w2Y3+q6RIkln2W8rWJFje00644o8hXy7v46giJCedmF
//     ULlhm1n7XIsZGy2W3lJ77v5agn9gFwXu1h3cqkGXkoteE6SQJQXWgsW3GWPveObvTL8LF4y57fgM
//     9ZWS+V9MJajeu44Rf/tU17TLYKjvEjGCA7MwggOvAgEBMIGgMIGSMQswCQYDVQQGEwJBVTERMA8G
//     A1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lk
//     Z2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWluQGludGVy
//     bmV0d2lkZ2V0cy5jb20CCQDD7CQk9dXJ4jANBglghkgBZQMEAgEFAKCCAjQwGAYJKoZIhvcNAQkD
//     MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTcwNDIwMTUxNDU4WjAvBgkqhkiG9w0BCQQx
//     IgQgoHOtpFiAgti0cwDw46C8wyYSZbhx2yJqJZ/qRE8WPSQwXwYJKoZIhvcNAQkPMVIwUDALBglg
//     hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcGBSsO
//     AwIHMA0GCCqGSIb3DQMCAgEoMIGxBgkrBgEEAYI3EAQxgaMwgaAwgZIxCzAJBgNVBAYTAkFVMREw
//     DwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5ldCBX
//     aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5AaW50
//     ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMIGzBgsqhkiG9w0BCRACCzGBo6CBoDCBkjELMAkG
//     A1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoM
//     GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkB
//     FhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwPQYJKoZIhvcNAQEKMDCgDTAL
//     BglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMCASAEgYCDQpT6vJZ9zERJ
//     JVX69PGUfCN5Eq9pKzoOTQSrIBe1YgNDSPd5pyOPP2MN1RpI0T/GTQZw4iWy5LZq0T5sjmk3fFVB
//     +VZjKtkTuhGaCdzMQXomVLBbI2fN4UaA4v1/Ayrqr8SY9Rsa20TpKv/bufK7oYs083UOtlcA1EHY
//     41wQ5A==
//
//     --------------050103020705000601010800--