Unicode C
Unicode C
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. .Chilkat Unicode C Downloads
#include <C_CkPfxW.h>
#include <C_CkEmailW.h>
#include <C_CkCertW.h>
#include <C_CkMailManW.h>
void ChilkatSample(void)
{
BOOL success;
HCkPfxW pfx;
HCkEmailW email;
HCkCertW cert;
HCkMailManW mailman;
success = FALSE;
// 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 = CkPfxW_Create();
success = CkPfxW_LoadPfxFile(pfx,L"qa_data/rsassa-pss/privatekey.pfx",L"PFX_PASSWORD");
if (success == FALSE) {
wprintf(L"%s\n",CkPfxW_lastErrorText(pfx));
CkPfxW_Dispose(pfx);
return;
}
email = CkEmailW_Create();
// Create a simple email.
CkEmailW_putSubject(email,L"Sample RSASSA-PSS Signed Email");
CkEmailW_putBody(email,L"Sample RSASSA-PSS Signed Email");
CkEmailW_putFrom(email,L"from_name@mydomain.com");
// Add one ore more recipients..
CkEmailW_AddTo(email,L"Chilkat Support",L"support@chilkatsoft.com");
CkEmailW_AddTo(email,L"Chilkat GMail",L"chilkat.support@gmail.com");
// Indicate that the email is to be signed, and that we want to use RSASSA-PSS.
CkEmailW_putSendSigned(email,TRUE);
CkEmailW_putSigningAlg(email,L"pss");
CkEmailW_putSigningHashAlg(email,L"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 = CkCertW_Create();
success = CkPfxW_CertAt(pfx,0,cert);
if (success == FALSE) {
wprintf(L"%s\n",CkPfxW_lastErrorText(pfx));
CkPfxW_Dispose(pfx);
CkEmailW_Dispose(email);
CkCertW_Dispose(cert);
return;
}
// Tell the email object to use this cert (and private key) for signing.
CkEmailW_SetSigningCert(email,cert);
mailman = CkMailManW_Create();
// Set the SMTP settings for your email account on your mail server.
CkMailManW_putSmtpUsername(mailman,L"SMTP_LOGIN");
CkMailManW_putSmtpPassword(mailman,L"SMTP_PASSWORD");
CkMailManW_putSmtpHost(mailman,L"MY_SMTP_DOMAIN_OR_IP");
CkMailManW_putSmtpPort(mailman,587);
CkMailManW_putStartTLS(mailman,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..
CkMailManW_putOpaqueSigning(mailman,FALSE);
// Send the email. The mailman will sign the email as directed by the
// property settings of the email object.
success = CkMailManW_SendEmail(mailman,email);
if (success == FALSE) {
wprintf(L"%s\n",CkMailManW_lastErrorText(mailman));
CkPfxW_Dispose(pfx);
CkEmailW_Dispose(email);
CkCertW_Dispose(cert);
CkMailManW_Dispose(mailman);
return;
}
success = CkMailManW_CloseSmtpConnection(mailman);
if (success != TRUE) {
wprintf(L"Connection to SMTP server not closed cleanly.\n");
}
wprintf(L"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
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// A1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lk
// Z2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWluQGludGVy
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// 41wQ5A==
//
// --------------050103020705000601010800--
CkPfxW_Dispose(pfx);
CkEmailW_Dispose(email);
CkCertW_Dispose(cert);
CkMailManW_Dispose(mailman);
}