Lua

Create ICP-Brasil Compliant CMS Signature

See more CAdES Examples

Demonstrates how to create a .p7s signature that contains a data file, which in this case is a PDF. The .p7s will be compliant with the ICP-Brazil Digital Signature Standard.

The .p7s file created by this example can be verified at ICP-Brasil Online Verifier

Lua

local chilkat = require("chilkat")

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

-- ------------------------------------------------------------------------------------------------------
-- Note: This example creates a CMS signature (.p7s) that contains the PDF.
-- It is different than signing a PDF.  To sign a PDF where the resulting PDF contains the CMS signature,
-- see this example:  Sign PDF for ICP-Brasil
-- ------------------------------------------------------------------------------------------------------
local crypt = chilkat.Crypt2.new()

-- Any type of file can be signed.  It doesn't have to be a PDF.
local inFile = "qa_data/pdf/helloWorld.pdf"

local bd = chilkat.BinData.new()
local success = bd:load_file(inFile)
if not success then
    print("Failed to load " .. inFile)
    return
end

-- We'll be using a certificate w/ private key stored on a smartcard for signing.
local cert = chilkat.Cert.new()

-- If the smartcard or token requires a PIN, we can set it here to avoid the dialog...
cert.smart_card_pin = "000000"

success = cert:load_from_smartcard("")
if not success then
    print(cert.last_error_text)
    return
end

-- Tell the crypt component to use this cert.
success = crypt:set_signing_cert(cert)
if not success then
    print(crypt.last_error_text)
    return
end

-- Set properties for signing...
crypt.hash_algorithm = "sha256"

local jsonSigningAttrs = chilkat.JsonObject.new()
jsonSigningAttrs:update_int("contentType", 1)
jsonSigningAttrs:update_int("signingTime", 1)
jsonSigningAttrs:update_int("messageDigest", 1)
jsonSigningAttrs:update_bool("signingCertificateV2", 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 --> 2.16.76.1.7.1.5.1
-- 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 --> 2.16.76.1.7.1.1.1
-- 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 --> 2.16.76.1.7.1.4.1
-- 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 --> 2.16.76.1.7.1.2.1
-- 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 --> 2.16.76.1.7.1.3.1
-- 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

-- Set the policy OID and the profile name
jsonSigningAttrs:update_string("policyId.id", "2.16.76.1.7.1.1.2.3")
jsonSigningAttrs:update_string("policyId.profile", "PA_AD_RB_v2_3")

crypt.signing_attributes = jsonSigningAttrs:emit()

-- The Brazil government validator requires the ASN.1 data to be in "constructed octets" form..
crypt.uncommon_options = "UseConstructedOctets,OmitAlgorithmIdNull"
crypt.include_cert_chain = false

-- Sign.
success = crypt:opaque_sign_bd(bd)
if not success then
    print(crypt.last_error_text)
    return
end

-- Save to a .p7s
success = bd:write_file("qa_output/helloWorld.pdf.p7s")

print("Success")