B4X

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

See more Egypt ITIDA Examples

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

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

B4X

Dim success As Boolean = False

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

Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

Dim cert As ChilkatCert
cert.Initialize("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..
success = cert.LoadFromSmartcard("")
If success <> True Then
    Log(cert.LastErrorText)
    Return
End If


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


Dim cmsOptions As ChilkatJsonObject
cmsOptions.Initialize
'  Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
cmsOptions.UpdateBool("DigestData", True)
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 ChilkatJsonObject
jsonSigningAttrs.Initialize
jsonSigningAttrs.UpdateInt("contentType", 1)
jsonSigningAttrs.UpdateInt("signingTime", 1)
jsonSigningAttrs.UpdateInt("messageDigest", 1)
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 = Chr(34) & "issuer" & Chr(34) & Chr(34) & "address" & Chr(34) & Chr(34) & "branchID" & Chr(34) & Chr(34) & "0" & Chr(34) & Chr(34) & "country" & Chr(34) & Chr(34) & "EG" & Chr(34) & Chr(34) & "regionCity..."

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


Log("Base64 signature:")
Log(sigBase64)