Visual FoxPro

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.

Visual FoxPro

LOCAL lnSuccess
LOCAL loCrypt
LOCAL loCert
LOCAL loCmsOptions
LOCAL loJsonSigningAttrs
LOCAL lcTextToSign
LOCAL lcSigBase64

lnSuccess = 0

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

loCrypt = CreateObject('Chilkat.Crypt2')

loCert = CreateObject('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..
lnSuccess = loCert.LoadFromSmartcard("")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loCrypt
    RELEASE loCert
    CANCEL
ENDIF

* Tell the crypt component to use this cert.
lnSuccess = loCrypt.SetSigningCert(loCert)
IF (lnSuccess <> 1) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loCert
    CANCEL
ENDIF

loCmsOptions = CreateObject('Chilkat.JsonObject')
* Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
loCmsOptions.UpdateBool("DigestData",1)
loCmsOptions.UpdateBool("OmitAlgorithmIdNull",1)
loCrypt.CmsOptions = loCmsOptions.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. 
loCrypt.CadesEnabled = 1

loCrypt.HashAlgorithm = "sha256"

loJsonSigningAttrs = CreateObject('Chilkat.JsonObject')
loJsonSigningAttrs.UpdateInt("contentType",1)
loJsonSigningAttrs.UpdateInt("signingTime",1)
loJsonSigningAttrs.UpdateInt("messageDigest",1)
loJsonSigningAttrs.UpdateInt("signingCertificateV2",1)
loCrypt.SigningAttributes = loJsonSigningAttrs.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:
loCrypt.IncludeCertChain = 0

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

* Create the CAdES-BES signature.
lcTextToSign = '"issuer""address""branchID""0""country""EG""regionCity...'

loCrypt.EncodingMode = "base64"
lcSigBase64 = loCrypt.SignStringENC(lcTextToSign)
IF (loCrypt.LastMethodSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loCert
    RELEASE loCmsOptions
    RELEASE loJsonSigningAttrs
    CANCEL
ENDIF

? "Base64 signature:"
? lcSigBase64

RELEASE loCrypt
RELEASE loCert
RELEASE loCmsOptions
RELEASE loJsonSigningAttrs