Rust Requires Chilkat v11.0.0+
Rust
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 Rust Downloads
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
let mime = chilkat::Mime::new();
// Create a MIME message to sign.
let _ = mime.new_multipart_mixed();
let _ = mime.add_header_field("someHeader1", "Some value 1");
let _ = mime.add_header_field("someHeader2", "Some value 2");
let part0 = chilkat::Mime::new();
let _ = part0.add_header_field("hdrA", "Some value A");
let _ = part0.add_header_field("hdrB", "Some value B");
part0.set_content_type("text/plain");
part0.set_body("This is the plain-text body.");
let part1 = chilkat::Mime::new();
let _ = part1.add_header_field("hdrX", "Some value X");
let _ = part1.add_header_field("hdrY", "Some value Y");
part1.set_content_type("text/xml");
part1.set_body("<a>This is the XML body</a>");
let _ = mime.append_part(&part0);
let _ = mime.append_part(&part1);
// The MIME to be signed:
let sb_unsigned_mime = chilkat::StringBuilder::new();
let _ = mime.get_mime_sb(&sb_unsigned_mime);
println!("{}", sb_unsigned_mime.get_as_string().unwrap_or_default());
// 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.)
let pfx = chilkat::Pfx::new();
if pfx.load_pfx_file("qa_data/rsassa-pss/privatekey.pfx", "PFX_PASSWORD").is_err() {
println!("{}", pfx.last_error_text());
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.)
let cert = chilkat::Cert::new();
if pfx.cert_at(0, &cert).is_err() {
println!("{}", pfx.last_error_text());
return;
}
// Indicate that RSASSA-PSS with SHA256 should be used.
mime.set_signing_alg("pss");
mime.set_signing_hash_alg("sha256");
// Add a detached signature.
if mime.add_detached_signature(&cert).is_err() {
println!("{}", mime.last_error_text());
return;
}
// Show the clear-signed MIME. (see the sample output below)
println!("-------------------------------------------------------------");
println!("Clear-signed MIME using detached signature:");
println!("-------------------------------------------------------------");
println!("{}", mime.get_mime().unwrap_or_default());
// Restore the original unsigned MIME, and this time create an opaque signature.
let _ = mime.load_mime(&sb_unsigned_mime.get_as_string().unwrap_or_default());
// Sign using an opaque signature
if mime.convert_to_signed(&cert).is_err() {
println!("{}", mime.last_error_text());
return;
}
// Show the opaque-signed MIME. (see the sample output below)
println!("-------------------------------------------------------------");
println!("Opaque-signed MIME :");
println!("-------------------------------------------------------------");
println!("{}", mime.get_mime().unwrap_or_default());
println!("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
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//