PowerBuilder Requires Chilkat v11.0.0+
PowerBuilder
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 PowerBuilder Downloads
integer li_rc
integer li_Success
oleobject loo_Mime
oleobject loo_Part0
oleobject loo_Part1
oleobject loo_SbUnsignedMime
oleobject loo_Pfx
oleobject loo_Cert
li_Success = 0
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat.Mime")
if li_rc < 0 then
destroy loo_Mime
MessageBox("Error","Connecting to COM object failed")
return
end if
// Create a MIME message to sign.
loo_Mime.NewMultipartMixed()
loo_Mime.AddHeaderField("someHeader1","Some value 1")
loo_Mime.AddHeaderField("someHeader2","Some value 2")
loo_Part0 = create oleobject
li_rc = loo_Part0.ConnectToNewObject("Chilkat.Mime")
loo_Part0.AddHeaderField("hdrA","Some value A")
loo_Part0.AddHeaderField("hdrB","Some value B")
loo_Part0.ContentType = "text/plain"
loo_Part0.SetBody("This is the plain-text body.")
loo_Part1 = create oleobject
li_rc = loo_Part1.ConnectToNewObject("Chilkat.Mime")
loo_Part1.AddHeaderField("hdrX","Some value X")
loo_Part1.AddHeaderField("hdrY","Some value Y")
loo_Part1.ContentType = "text/xml"
loo_Part1.SetBody("<a>This is the XML body</a>")
loo_Mime.AppendPart(loo_Part0)
loo_Mime.AppendPart(loo_Part1)
// The MIME to be signed:
loo_SbUnsignedMime = create oleobject
li_rc = loo_SbUnsignedMime.ConnectToNewObject("Chilkat.StringBuilder")
loo_Mime.GetMimeSb(loo_SbUnsignedMime)
Write-Debug loo_SbUnsignedMime.GetAsString()
// 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.)
loo_Pfx = create oleobject
li_rc = loo_Pfx.ConnectToNewObject("Chilkat.Pfx")
li_Success = loo_Pfx.LoadPfxFile("qa_data/rsassa-pss/privatekey.pfx","PFX_PASSWORD")
if li_Success = 0 then
Write-Debug loo_Pfx.LastErrorText
destroy loo_Mime
destroy loo_Part0
destroy loo_Part1
destroy loo_SbUnsignedMime
destroy loo_Pfx
return
end if
// 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.)
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")
li_Success = loo_Pfx.CertAt(0,loo_Cert)
if li_Success = 0 then
Write-Debug loo_Pfx.LastErrorText
destroy loo_Mime
destroy loo_Part0
destroy loo_Part1
destroy loo_SbUnsignedMime
destroy loo_Pfx
destroy loo_Cert
return
end if
// Indicate that RSASSA-PSS with SHA256 should be used.
loo_Mime.SigningAlg = "pss"
loo_Mime.SigningHashAlg = "sha256"
// Add a detached signature.
li_Success = loo_Mime.AddDetachedSignature(loo_Cert)
if li_Success <> 1 then
Write-Debug loo_Mime.LastErrorText
destroy loo_Mime
destroy loo_Part0
destroy loo_Part1
destroy loo_SbUnsignedMime
destroy loo_Pfx
destroy loo_Cert
return
end if
// Show the clear-signed MIME. (see the sample output below)
Write-Debug "-------------------------------------------------------------"
Write-Debug "Clear-signed MIME using detached signature:"
Write-Debug "-------------------------------------------------------------"
Write-Debug loo_Mime.GetMime()
// Restore the original unsigned MIME, and this time create an opaque signature.
loo_Mime.LoadMime(loo_SbUnsignedMime.GetAsString())
// Sign using an opaque signature
li_Success = loo_Mime.ConvertToSigned(loo_Cert)
if li_Success <> 1 then
Write-Debug loo_Mime.LastErrorText
destroy loo_Mime
destroy loo_Part0
destroy loo_Part1
destroy loo_SbUnsignedMime
destroy loo_Pfx
destroy loo_Cert
return
end if
// Show the opaque-signed MIME. (see the sample output below)
Write-Debug "-------------------------------------------------------------"
Write-Debug "Opaque-signed MIME :"
Write-Debug "-------------------------------------------------------------"
Write-Debug loo_Mime.GetMime()
Write-Debug "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
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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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// MDEwNTAwMDEwOTA3DQpoZHJBOiBTb21lIHZhbHVlIEENCmhkckI6IFNvbWUgdmFsdWUgQg0KQ29u
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// /QTfrLOuzXKy
//
destroy loo_Mime
destroy loo_Part0
destroy loo_Part1
destroy loo_SbUnsignedMime
destroy loo_Pfx
destroy loo_Cert