Lua Requires Chilkat v11.0.0+
Lua
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 Lua Downloads
local chilkat = require("chilkat")
-- This requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.
local mime = chilkat.Mime.new()
-- Create a MIME message to sign.
mime:new_multipart_mixed()
mime:add_header_field("someHeader1", "Some value 1")
mime:add_header_field("someHeader2", "Some value 2")
local part0 = chilkat.Mime.new()
part0:add_header_field("hdrA", "Some value A")
part0:add_header_field("hdrB", "Some value B")
part0.content_type = "text/plain"
part0:set_body("This is the plain-text body.")
local part1 = chilkat.Mime.new()
part1:add_header_field("hdrX", "Some value X")
part1:add_header_field("hdrY", "Some value Y")
part1.content_type = "text/xml"
part1:set_body("<a>This is the XML body</a>")
mime:append_part(part0)
mime:append_part(part1)
-- The MIME to be signed:
local sbUnsignedMime = chilkat.StringBuilder.new()
mime:get_mime_sb(sbUnsignedMime)
print(sbUnsignedMime:get_as_string())
-- 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.)
local pfx = chilkat.Pfx.new()
local success = pfx:load_pfx_file("qa_data/rsassa-pss/privatekey.pfx", "PFX_PASSWORD")
if not success then
print(pfx.last_error_text)
return
end
-- 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.)
local cert = chilkat.Cert.new()
success = pfx:cert_at(0, cert)
if not success then
print(pfx.last_error_text)
return
end
-- Indicate that RSASSA-PSS with SHA256 should be used.
mime.signing_alg = "pss"
mime.signing_hash_alg = "sha256"
-- Add a detached signature.
success = mime:add_detached_signature(cert)
if not success then
print(mime.last_error_text)
return
end
-- Show the clear-signed MIME. (see the sample output below)
print("-------------------------------------------------------------")
print("Clear-signed MIME using detached signature:")
print("-------------------------------------------------------------")
print(mime:get_mime())
-- Restore the original unsigned MIME, and this time create an opaque signature.
mime:load_mime(sbUnsignedMime:get_as_string())
-- Sign using an opaque signature
success = mime:convert_to_signed(cert)
if not success then
print(mime.last_error_text)
return
end
-- Show the opaque-signed MIME. (see the sample output below)
print("-------------------------------------------------------------")
print("Opaque-signed MIME :")
print("-------------------------------------------------------------")
print(mime:get_mime())
print("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
-- QGludGVybmV0d2lkZ2V0cy5jb20wHhcNMTYxMTAxMTY1MjMyWhcNMjExMDMxMTY1MjMyWjCBkjEL
-- MAkGA1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNV
-- BAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcN
-- AQkBFhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB
-- gQDGIdoCjyavs+F/Rm0VIB4m6O7VL1j+1IqieoR9NEX2GQvu2VCdceyxf9qaw1bxipEvjLwUkw7M
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-- GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkB
-- FhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwPQYJKoZIhvcNAQEKMDCgDTAL
-- BglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMCASAEgYAvqIqKBzNXyVbh
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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
-- LS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3DQpoZHJYOiBTb21lIHZhbHVlIFgN
-- Cmhkclk6IFNvbWUgdmFsdWUgWQ0KQ29udGVudC1UeXBlOiB0ZXh0L3htbA0KDQo8YT5UaGlzIGlz
-- IHRoZSBYTUwgYm9keTwvYT4NCi0tLS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3
-- LS0NCqCCAvgwggL0MIICXaADAgECAgkAw+wkJPXVyeIwDQYJKoZIhvcNAQELBQAwgZIxCzAJBgNV
-- BAYTAkFVMREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJ
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-- /QTfrLOuzXKy
--