Zig Requires Chilkat v11.0.0+
Zig
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 Zig Downloads
const std = @import("std");
const chilkat = @import("chilkat");
pub fn main(init: std.process.Init) !void {
const alloc = init.arena.allocator();
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
const mime = try chilkat.Mime.init();
defer mime.deinit();
// Create a MIME message to sign.
mime.newMultipartMixed() catch {};
mime.addHeaderField("someHeader1", "Some value 1") catch {};
mime.addHeaderField("someHeader2", "Some value 2") catch {};
const part0 = try chilkat.Mime.init();
defer part0.deinit();
part0.addHeaderField("hdrA", "Some value A") catch {};
part0.addHeaderField("hdrB", "Some value B") catch {};
part0.setContentType("text/plain");
part0.setBody("This is the plain-text body.");
const part1 = try chilkat.Mime.init();
defer part1.deinit();
part1.addHeaderField("hdrX", "Some value X") catch {};
part1.addHeaderField("hdrY", "Some value Y") catch {};
part1.setContentType("text/xml");
part1.setBody("<a>This is the XML body</a>");
mime.appendPart(part0) catch {};
mime.appendPart(part1) catch {};
// The MIME to be signed:
const sb_unsigned_mime = try chilkat.StringBuilder.init();
defer sb_unsigned_mime.deinit();
mime.getMimeSb(sb_unsigned_mime) catch {};
std.debug.print("{s}\n", .{try sb_unsigned_mime.getAsString(alloc)});
// 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.)
const pfx = try chilkat.Pfx.init();
defer pfx.deinit();
pfx.loadPfxFile("qa_data/rsassa-pss/privatekey.pfx", "PFX_PASSWORD") catch {
std.debug.print("{s}\n", .{try pfx.getLastErrorText(alloc)});
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.)
const cert = try chilkat.Cert.init();
defer cert.deinit();
pfx.certAt(0, cert) catch {
std.debug.print("{s}\n", .{try pfx.getLastErrorText(alloc)});
return;
};
// Indicate that RSASSA-PSS with SHA256 should be used.
mime.setSigningAlg("pss");
mime.setSigningHashAlg("sha256");
// Add a detached signature.
mime.addDetachedSignature(cert) catch {
std.debug.print("{s}\n", .{try mime.getLastErrorText(alloc)});
return;
};
// Show the clear-signed MIME. (see the sample output below)
std.debug.print("-------------------------------------------------------------\n", .{});
std.debug.print("Clear-signed MIME using detached signature:\n", .{});
std.debug.print("-------------------------------------------------------------\n", .{});
std.debug.print("{s}\n", .{try mime.getMime(alloc)});
// Restore the original unsigned MIME, and this time create an opaque signature.
mime.loadMime(try sb_unsigned_mime.getAsString(alloc)) catch {};
// Sign using an opaque signature
mime.convertToSigned(cert) catch {
std.debug.print("{s}\n", .{try mime.getLastErrorText(alloc)});
return;
};
// Show the opaque-signed MIME. (see the sample output below)
std.debug.print("-------------------------------------------------------------\n", .{});
std.debug.print("Opaque-signed MIME :\n", .{});
std.debug.print("-------------------------------------------------------------\n", .{});
std.debug.print("{s}\n", .{try mime.getMime(alloc)});
std.debug.print("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
// 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
// MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTcwNDIwMTU1NDMyWjAvBgkqhkiG9w0BCQQx
// IgQgFEtkdw1+iBXvplXCUkOPlq66b+mDg+HBcChLn5YowD8wXwYJKoZIhvcNAQkPMVIwUDALBglg
// hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcGBSsO
// AwIHMA0GCCqGSIb3DQMCAgEoMIGxBgkrBgEEAYI3EAQxgaMwgaAwgZIxCzAJBgNVBAYTAkFVMREw
// DwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5ldCBX
// aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5AaW50
// ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMIGzBgsqhkiG9w0BCRACCzGBo6CBoDCBkjELMAkG
// A1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoM
// GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkB
// FhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwPQYJKoZIhvcNAQEKMDCgDTAL
// BglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMCASAEgYAvqIqKBzNXyVbh
// TmaxdAc4d0ZTqWT6Na3C+DMO8owSKWy5FdGbJ2DLKm92qe/KLPTcj51vuwLUQb0Sw7r5Xknl+/6p
// Eqn2qe/6hgDn06vvzNofVAweOtSVJsBO7/cYYPc+pXZZ2BcpZDdf/9Ci56Yrlk7A72BeqPe47J3F
// 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
// LS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3DQpoZHJYOiBTb21lIHZhbHVlIFgN
// Cmhkclk6IFNvbWUgdmFsdWUgWQ0KQ29udGVudC1UeXBlOiB0ZXh0L3htbA0KDQo8YT5UaGlzIGlz
// IHRoZSBYTUwgYm9keTwvYT4NCi0tLS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3
// LS0NCqCCAvgwggL0MIICXaADAgECAgkAw+wkJPXVyeIwDQYJKoZIhvcNAQELBQAwgZIxCzAJBgNV
// BAYTAkFVMREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJ
// bnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZ
// YWRtaW5AaW50ZXJuZXR3aWRnZXRzLmNvbTAeFw0xNjExMDExNjUyMzJaFw0yMTEwMzExNjUyMzJa
// MIGSMQswCQYDVQQGEwJBVTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEh
// MB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkq
// hkiG9w0BCQEWGWFkbWluQGludGVybmV0d2lkZ2V0cy5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0A
// MIGJAoGBAMYh2gKPJq+z4X9GbRUgHibo7tUvWP7UiqJ6hH00RfYZC+7ZUJ1x7LF/2prDVvGKkS+M
// vBSTDsx74FOUulZBsEwfzuzoqmwLwxXJeEwuk/Sgzw0WLH+8vPbB0uFSHsJm8kDSmWqQmT1uPntA
// i74Q7WS1QczYMVvqxyS8IvbLJsPXAgMBAAGjUDBOMB0GA1UdDgQWBBQ40oq7bOxciuKdbEgZPrni
// +txDCzAfBgNVHSMEGDAWgBQ40oq7bOxciuKdbEgZPrni+txDCzAMBgNVHRMEBTADAQH/MA0GCSqG
// SIb3DQEBCwUAA4GBACsW92Lm72LZAXVDD5x0LWXvDZjf6rpEiSWfZbytYkWN7TTrjijyFfLu/jqC
// IkJ52YVQuWGbWftcixkbLZbeUnvu/lqCf2AXBe7WHdyqQZeSi14TpJAlBdaCxbcZY+945u9MvwsX
// jLnt+Az1lZL5X0wlqN67jhF/+1TXtMtgqO8SMYIDszCCA68CAQEwgaAwgZIxCzAJBgNVBAYTAkFV
// MREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5l
// dCBXaWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5A
// aW50ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMA0GCWCGSAFlAwQCAQUAoIICNDAYBgkqhkiG
// 9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNzA0MjAxNTU4NTNaMC8GCSqGSIb3
// DQEJBDEiBCBWTSl3s251U8fqOeSAzUp1Yue53X+UCWT0ux+fclE4FDBfBgkqhkiG9w0BCQ8xUjBQ
// MAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAw
// BwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgbEGCSsGAQQBgjcQBDGBozCBoDCBkjELMAkGA1UEBhMC
// QVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoMGEludGVy
// bmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkBFhlhZG1p
// bkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwgbMGCyqGSIb3DQEJEAILMYGjoIGgMIGS
// MQswCQYDVQQGEwJBVTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8G
// A1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG
// 9w0BCQEWGWFkbWluQGludGVybmV0d2lkZ2V0cy5jb20CCQDD7CQk9dXJ4jA9BgkqhkiG9w0BAQow
// MKANMAsGCWCGSAFlAwQCAaEaMBgGCSqGSIb3DQEBCDALBglghkgBZQMEAgGiAwIBIASBgILtktxt
// tXWMWio7hLcvHUWk0Q3jP3rRdgNhcd/NdZsgDFP9/aq8/nHLLHSWfSh1PH+eZeKJwXxUH4Lwk6Sm
// xFt97jyi3HaC3fezUSEqyg5WFG6fwOZGK4qF0WF+q29lvyNyV3iIQgDWxZQOcVL2fhpqUjoytkxj
// /QTfrLOuzXKy
//
}