Lua

Sign PDF for ICP-Brasil

See more PDF Signatures Examples

Sign a PDF to create a signed PDF compliant with the ICP-Brasil Digital Signature Standard Conformity Checker. (Verificador de Conformidade do Padrão de Assinatura Digital ICP-Brasil) Lua

local chilkat = require("chilkat")

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

-- The signed PDF produced by this example should be verifiable at https://validar.iti.gov.br/
local pdf = chilkat.Pdf.new()

-- Load a PDF to be signed.
-- The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
local success = pdf:load_file("qa_data/pdf/hello.pdf")
if not success then
    print(pdf.last_error_text)
    return
end

local json = chilkat.JsonObject.new()

-- Define the appearance and location of the signature.
json:update_int("page", 1)
json:update_string("appearance.y", "bottom")
json:update_string("appearance.x", "middle")
json:update_string("appearance.fontScale", "9.0")
json:update_string("appearance.text[0]", "Digitally signed by: cert_cn")
json:update_string("appearance.text[1]", "current_dt")
json:update_string("appearance.image", "document-accepted")
json:update_string("appearance.imagePlacement", "left")
json:update_string("appearance.imageOpacity", "100")

-- Add the CMS options required for ICP-Brasil
json:update_int("contentType", 1)
json:update_int("messageDigest", 1)
json:update_int("signingCertificateV2", 1)
json:update_bool("ltvOcsp", true)

-- Listed here are the currently existing profiles. (Chilkat will add additional ICP Brasil policy profiles in future versions as new ones are created.)
-- See https://www.gov.br/iti/pt-br/assuntos/repositorio/artefatos-de-assinatura-digital for more information.
--
-- PA_AD_RA_v1_1 --> 2.16.76.1.7.1.5.1.1
-- PA_AD_RA_v1_2 --> 2.16.76.1.7.1.5.1.2
-- PA_AD_RA_v2_0 --> 2.16.76.1.7.1.5.2
-- PA_AD_RA_v2_1 --> 2.16.76.1.7.1.5.2.1
-- PA_AD_RA_v2_2 --> 2.16.76.1.7.1.5.2.2
-- PA_AD_RA_v2_3 --> 2.16.76.1.7.1.5.2.3
-- PA_AD_RA_v2_4 --> 2.16.76.1.7.1.5.2.4

-- PA_AD_RB_v1_1 --> 2.16.76.1.7.1.1.1.1
-- PA_AD_RB_v2_0 --> 2.16.76.1.7.1.1.2
-- PA_AD_RB_v2_1 --> 2.16.76.1.7.1.1.2.1
-- PA_AD_RB_v2_2 --> 2.16.76.1.7.1.1.2.2
-- PA_AD_RB_v2_3 --> 2.16.76.1.7.1.1.2.3

-- PA_AD_RC_v1_1 --> 2.16.76.1.7.1.4.1.1
-- PA_AD_RC_v2_0 --> 2.16.76.1.7.1.4.2
-- PA_AD_RC_v2_1 --> 2.16.76.1.7.1.4.2.1
-- PA_AD_RC_v2_2 --> 2.16.76.1.7.1.4.2.2
-- PA_AD_RC_v2_3 --> 2.16.76.1.7.1.4.2.3

-- PA_AD_RT_v1_1 --> 2.16.76.1.7.1.2.1.1
-- PA_AD_RT_v2_0 --> 2.16.76.1.7.1.2.2
-- PA_AD_RT_v2_1 --> 2.16.76.1.7.1.2.2.1
-- PA_AD_RT_v2_2 --> 2.16.76.1.7.1.2.2.2
-- PA_AD_RT_v2_3 --> 2.16.76.1.7.1.2.2.3

-- PA_AD_RV_v1_1 --> 2.16.76.1.7.1.3.1.1
-- PA_AD_RV_v2_0 --> 2.16.76.1.7.1.3.2
-- PA_AD_RV_v2_1 --> 2.16.76.1.7.1.3.2.1
-- PA_AD_RV_v2_2 --> 2.16.76.1.7.1.3.2.2
-- PA_AD_RV_v2_3 --> 2.16.76.1.7.1.3.2.3

-- PA_PAdES_AD_RA_v1_0 --> 2.16.76.1.7.1.14.1
-- PA_PAdES_AD_RA_v1_1 --> 2.16.76.1.7.1.14.1.1
-- PA_PAdES_AD_RA_v1_2 --> 2.16.76.1.7.1.14.1.2
-- PA_PAdES_AD_RB_v1_0 --> 2.16.76.1.7.1.11.1
-- PA_PAdES_AD_RB_v1_1 --> 2.16.76.1.7.1.11.1.1
-- PA_PAdES_AD_RC_v1_0 --> 2.16.76.1.7.1.13.1
-- PA_PAdES_AD_RC_v1_1 --> 2.16.76.1.7.1.13.1.1
-- PA_PAdES_AD_RC_v1_2 --> 2.16.76.1.7.1.13.1.2
-- PA_PAdES_AD_RT_v1_0 --> 2.16.76.1.7.1.12.1
-- PA_PAdES_AD_RT_v1_1 --> 2.16.76.1.7.1.12.1.1

-- Set the policy profile name
-- ---------------------------------------------------
-- Note: On 24-May-2024, I was informed that adding the "policyId.profile"
-- causes the PDF signature to fail validation at https://validar.iti.gov.br/
-- Perhaps something changed in the years since this example was originally written and tested to be working.
-- You may need to omit the "policyId.profile".
-- ---------------------------------------------------
json:update_string("policyId.profile", "PA_PAdES_AD_RB_v1_1")

-- Load the signing certificate. (Use your own certificate.)
-- Note: If loading from a smart card, call LoadFromSmartcard instead.
local cert = chilkat.Cert.new()
success = cert:load_pfx_file("qa_data/pfx/myPdfSigningCert.pfx", "pfx_password")
if not success then
    print(cert.last_error_text)
    return
end

-- Tell the pdf object to use the certificate for signing.
success = pdf:set_signing_cert(cert)
if not success then
    print(pdf.last_error_text)
    return
end

success = pdf:sign_pdf(json, "qa_output/hello_signed.pdf")
if not success then
    print(pdf.last_error_text)
    return
end

print("The PDF has been successfully cryptographically signed.")