(Go) 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.

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

    crypt := chilkat.NewCrypt2()

    cert := chilkat.NewCert()

    // 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 {
        fmt.Println(cert.LastErrorText())
        crypt.DisposeCrypt2()
        cert.DisposeCert()
        return
    }

    // Tell the crypt component to use this cert.
    success = crypt.SetSigningCert(cert)
    if success != true {
        fmt.Println(crypt.LastErrorText())
        crypt.DisposeCrypt2()
        cert.DisposeCert()
        return
    }

    cmsOptions := chilkat.NewJsonObject()
    // Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
    cmsOptions.UpdateBool("DigestData",true)
    cmsOptions.UpdateBool("OmitAlgorithmIdNull",true)
    crypt.SetCmsOptions(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.SetCadesEnabled(true)

    crypt.SetHashAlgorithm("sha256")

    jsonSigningAttrs := chilkat.NewJsonObject()
    jsonSigningAttrs.UpdateInt("contentType",1)
    jsonSigningAttrs.UpdateInt("signingTime",1)
    jsonSigningAttrs.UpdateInt("messageDigest",1)
    jsonSigningAttrs.UpdateInt("signingCertificateV2",1)
    crypt.SetSigningAttributes(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.SetIncludeCertChain(false)

    // Make sure we sign the utf-8 byte representation of the JSON string
    crypt.SetCharset("utf-8")

    // Create the CAdES-BES signature.
    textToSign := "\"issuer\"\"address\"\"branchID\"\"0\"\"country\"\"EG\"\"regionCity..."

    crypt.SetEncodingMode("base64")
    sigBase64 := crypt.SignStringENC(textToSign)
    if crypt.LastMethodSuccess() == false {
        fmt.Println(crypt.LastErrorText())
        crypt.DisposeCrypt2()
        cert.DisposeCert()
        cmsOptions.DisposeJsonObject()
        jsonSigningAttrs.DisposeJsonObject()
        return
    }

    fmt.Println("Base64 signature:")
    fmt.Println(*sigBase64)

    crypt.DisposeCrypt2()
    cert.DisposeCert()
    cmsOptions.DisposeJsonObject()
    jsonSigningAttrs.DisposeJsonObject()