(Xojo Plugin) Create Egypt ITIDA CAdES-BES .p7s Signature (with strings in-memory)

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Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements.

Note: This example requires Chilkat v9.5.0.75 or greater.

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

Dim crypt As New Chilkat.Crypt2

Dim cert As New Chilkat.Cert

// There are many ways to load the certificate.  
// This example was created for a customer using an ePass2003 USB token.
// Assuming the USB token is the only source of a hardware-based private key..
Dim success As Boolean
success = cert.LoadFromSmartcard("")
If (success <> True) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

// Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)
If (success <> True) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

Dim cmsOptions As New Chilkat.JsonObject
// Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
success = cmsOptions.UpdateBool("DigestData",True)
success = cmsOptions.UpdateBool("OmitAlgorithmIdNull",True)
crypt.CmsOptions = cmsOptions.Emit()

// The CadesEnabled property applies to all methods that create CMS/PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true. 
crypt.CadesEnabled = True

crypt.HashAlgorithm = "sha256"

Dim jsonSigningAttrs As New Chilkat.JsonObject
success = jsonSigningAttrs.UpdateInt("contentType",1)
success = jsonSigningAttrs.UpdateInt("signingTime",1)
success = jsonSigningAttrs.UpdateInt("messageDigest",1)
success = jsonSigningAttrs.UpdateInt("signingCertificateV2",1)
crypt.SigningAttributes = jsonSigningAttrs.Emit()

// By default, all the certs in the chain of authentication are included in the signature.
// If desired, we can choose to only include the signing certificate:
crypt.IncludeCertChain = False

// Make sure we sign the utf-8 byte representation of the JSON string
crypt.Charset = "utf-8"

// Create the CAdES-BES signature.
Dim textToSign As String
textToSign = """issuer""""address""""branchID""""0""""country""""EG""""regionCity..."

crypt.EncodingMode = "base64"
Dim sigBase64 As String
sigBase64 = crypt.SignStringENC(textToSign)
If (crypt.LastMethodSuccess = False) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

System.DebugLog("Base64 signature:")
System.DebugLog(sigBase64)