PowerBuilder

Sign String to create a CAdES-T Signature

See more CAdES Examples

This example will sign a string to create a CAdEST-T signature.

Note: This example requires Chilkat v9.5.0.78 or greater.

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Crypt
oleobject loo_Cert
oleobject loo_Attrs
string ls_StrToSign
oleobject loo_Bd

li_Success = 0

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// This example will use the certificate + private key currently inserted into a smartcard reader.
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

// If we wish to provide the smartcard PIN (otherwise the user will be prompted by the operating system).
loo_Cert.SmartCardPin = "000000"
li_Success = loo_Cert.LoadFromSmartcard("")
if li_Success <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    return
end if

// Note: It is also possible to use certs from .pfx/.p12, .pem, or other sources such as 
// pre-installed Windows certificates.

li_Success = loo_Crypt.SetSigningCert(loo_Cert)

// Use SHA-256 rather than the default of SHA-1
loo_Crypt.HashAlgorithm = "sha256"

// Create JSON that tells Chilkat what signing attributes to include:
loo_Attrs = create oleobject
li_rc = loo_Attrs.ConnectToNewObject("Chilkat.JsonObject")

loo_Attrs.UpdateBool("contentType",1)
loo_Attrs.UpdateBool("signingTime",1)
loo_Attrs.UpdateBool("messageDigest",1)
loo_Attrs.UpdateBool("signingCertificateV2",1)

// A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
// We must include the TSA's URL, as well as a few options to indicate what is desired.
// Except for the TSA URL, the options shown here are typically what you would need.
loo_Attrs.UpdateBool("timestampToken.enabled",1)
loo_Attrs.UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr")
loo_Attrs.UpdateBool("timestampToken.addNonce",0)
loo_Attrs.UpdateBool("timestampToken.requestTsaCert",1)
loo_Attrs.UpdateString("timestampToken.hashAlg","sha256")

loo_Crypt.SigningAttributes = loo_Attrs.Emit()

ls_StrToSign = "THIS IS MY ID"

loo_Bd = create oleobject
li_rc = loo_Bd.ConnectToNewObject("Chilkat.BinData")

loo_Bd.AppendString(ls_StrToSign,"utf-8")

// This creates the CAdES-T signature.  During the signature creation, it
// communicates with the TSA to get a timestampToken.
// The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
li_Success = loo_Crypt.OpaqueSignBd(loo_Bd)
if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_Attrs
    destroy loo_Bd
    return
end if

// Get the signature in base64 format:
Write-Debug loo_Bd.GetEncoded("base64_mime")

// Or save the signature to a file.
loo_Bd.WriteFile("qa_output/cades-t_sample.p7m")

Write-Debug "Success."


destroy loo_Crypt
destroy loo_Cert
destroy loo_Attrs
destroy loo_Bd