Ruby Requires Chilkat v11.0.0+
Ruby
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 Ruby Downloads
require 'chilkat'
success = false
# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.
mime = Chilkat::CkMime.new()
# Create a MIME message to sign.
mime.NewMultipartMixed()
mime.AddHeaderField("someHeader1","Some value 1")
mime.AddHeaderField("someHeader2","Some value 2")
part0 = Chilkat::CkMime.new()
part0.AddHeaderField("hdrA","Some value A")
part0.AddHeaderField("hdrB","Some value B")
part0.put_ContentType("text/plain")
part0.SetBody("This is the plain-text body.")
part1 = Chilkat::CkMime.new()
part1.AddHeaderField("hdrX","Some value X")
part1.AddHeaderField("hdrY","Some value Y")
part1.put_ContentType("text/xml")
part1.SetBody("<a>This is the XML body</a>")
mime.AppendPart(part0)
mime.AppendPart(part1)
# The MIME to be signed:
sbUnsignedMime = Chilkat::CkStringBuilder.new()
mime.GetMimeSb(sbUnsignedMime)
print sbUnsignedMime.getAsString() + "\n";
# 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.)
pfx = Chilkat::CkPfx.new()
success = pfx.LoadPfxFile("qa_data/rsassa-pss/privatekey.pfx","PFX_PASSWORD")
if (success == false)
print pfx.lastErrorText() + "\n";
exit
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.)
cert = Chilkat::CkCert.new()
success = pfx.CertAt(0,cert)
if (success == false)
print pfx.lastErrorText() + "\n";
exit
end
# Indicate that RSASSA-PSS with SHA256 should be used.
mime.put_SigningAlg("pss")
mime.put_SigningHashAlg("sha256")
# Add a detached signature.
success = mime.AddDetachedSignature(cert)
if (success != true)
print mime.lastErrorText() + "\n";
exit
end
# Show the clear-signed MIME. (see the sample output below)
print "-------------------------------------------------------------" + "\n";
print "Clear-signed MIME using detached signature:" + "\n";
print "-------------------------------------------------------------" + "\n";
print mime.getMime() + "\n";
# Restore the original unsigned MIME, and this time create an opaque signature.
mime.LoadMime(sbUnsignedMime.getAsString())
# Sign using an opaque signature
success = mime.ConvertToSigned(cert)
if (success != true)
print mime.lastErrorText() + "\n";
exit
end
# Show the opaque-signed MIME. (see the sample output below)
print "-------------------------------------------------------------" + "\n";
print "Opaque-signed MIME :" + "\n";
print "-------------------------------------------------------------" + "\n";
print mime.getMime() + "\n";
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
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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
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#