(CkPython) Create CAdES Signature (.p7s) Compliant with ICP-Brazil Digital Signature Standard

See more CAdES Examples

Demonstrates how to create a CMS signature w/ policy ID that is compliant with the ICP-Brazil Digital Signature Standard.

For more information, see https://validar.iti.gov.br/

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

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

# ------------------------------------------------------------------------------------------------------
# Note: This example creates a CAdES (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
# ------------------------------------------------------------------------------------------------------

crypt = chilkat.CkCrypt2()

cert = chilkat.CkCert()
success = cert.LoadPfxFile("mySigningCert.pfx","pfxPassword")
if (success != True):
    print(cert.lastErrorText())
    sys.exit()

crypt.SetSigningCert(cert)

# See https://www.gov.br/iti/pt-br/assuntos/repositorio/artefatos-de-assinatura-digital

# Create JSON to indicate which signing attributes to include.
attrs = chilkat.CkJsonObject()
attrs.UpdateBool("contentType",True)
attrs.UpdateBool("signingTime",True)
attrs.UpdateBool("messageDigest",True)
attrs.UpdateBool("signingCertificateV2",True)

attrs.UpdateString("policyId.hashAlg","SHA256")

# 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
attrs.UpdateString("policyId.id","2.16.76.1.7.1.1.2.3")
attrs.UpdateString("policyId.profile","PA_AD_RB_v2_3")

crypt.put_SigningAttributes(attrs.emit())

# The input file can be any type of file.
inFile = "toBeSigned.pdf"
outFile = "signed.pdf.p7s"

success = crypt.CreateP7M(inFile,outFile)
if (success == False):
    print(crypt.lastErrorText())
    sys.exit()

print("Success.")