Question

我找到了Xades Signature for Python GitHub。我的计划是将Xades-EPES签名应用于XML文件。根据GitHub的工作，它能够执行此过程，但我无法执行此操作。

test_xades.py有两种方法。尝试运行该错误消息。好吧，问题在于我不确定该库是否可以签署Xades-EPES或如何实现。

提前谢谢

代码：

import unittest
from datetime import datetime
from os import path

from OpenSSL import crypto

import xmlsig
from xades import XAdESContext, template, utils, ObjectIdentifier
from xades.policy import GenericPolicyId, ImpliedPolicy
from basex import parse_xml, BASE_DIR 

class TestXadesSignature(unittest.TestCase):
    def test_verify(self):
        root = parse_xml('data/sample.xml')
        sign = root.xpath(
            '//ds:Signature', namespaces={'ds': xmlsig.constants.DSigNs}
        )[0]
        ctx = XAdESContext()
        ctx.verify(sign)

    def test_sign(self):
        root = parse_xml('data/unsigned-sample.xml')
        sign = root.xpath(
            '//ds:Signature', namespaces={'ds': xmlsig.constants.DSigNs}
        )[0]
        policy = GenericPolicyId(
            'http://www.facturae.es/politica_de_firma_formato_facturae/'
            'politica_de_firma_formato_facturae_v3_1.pdf',
            u"Politica de Firma FacturaE v3.1",
            xmlsig.constants.TransformSha1
        )
        ctx = XAdESContext(policy)
        with open(path.join(BASE_DIR, "data/keyStore.p12"), "rb") as key_file:
            ctx.load_pkcs12(crypto.load_pkcs12(key_file.read()))
        ctx.sign(sign)
        ctx.verify(sign)

    def test_create(self):
        root = parse_xml('data/free-sample.xml')
        signature = xmlsig.template.create(
            xmlsig.constants.TransformInclC14N,
            xmlsig.constants.TransformRsaSha1,
            "Signature"
        )
        signature_id = utils.get_unique_id()
        ref = xmlsig.template.add_reference(
            signature, xmlsig.constants.TransformSha1, uri="", name="REF"
        )
        xmlsig.template.add_transform(ref, xmlsig.constants.TransformEnveloped)
        xmlsig.template.add_reference(
            signature, xmlsig.constants.TransformSha1, uri="#KI"
        )
        xmlsig.template.add_reference(
            signature, xmlsig.constants.TransformSha1, uri="#" + signature_id
        )
        ki = xmlsig.template.ensure_key_info(signature, name='KI')
        data = xmlsig.template.add_x509_data(ki)
        xmlsig.template.x509_data_add_certificate(data)
        serial = xmlsig.template.x509_data_add_issuer_serial(data)
        xmlsig.template.x509_issuer_serial_add_issuer_name(serial)
        xmlsig.template.x509_issuer_serial_add_serial_number(serial)
        xmlsig.template.add_key_value(ki)
        qualifying = template.create_qualifying_properties(
            signature, name=utils.get_unique_id()
        )
        props = template.create_signed_properties(
            qualifying, name=signature_id
        )
        template.add_claimed_role(props, "Supp2")
        template.add_production_place(props, city='Madrid')
        template.add_production_place(
            props, state='BCN', postal_code='08000', country='ES')
        template.add_claimed_role(props, "Supp")
        policy = GenericPolicyId(
            'http://www.facturae.es/politica_de_firma_formato_facturae/'
            'politica_de_firma_formato_facturae_v3_1.pdf',
            u"Politica de Firma FacturaE v3.1",
            xmlsig.constants.TransformSha1
        )
        root.append(signature)
        ctx = XAdESContext(policy)
        with open(path.join(BASE_DIR, "data/keyStore.p12"), "rb") as key_file:
            ctx.load_pkcs12(crypto.load_pkcs12(key_file.read()))
        ctx.sign(signature)
        ctx.verify(signature)

    def test_create_2(self):
        root = parse_xml('data/free-sample.xml')
        signature = xmlsig.template.create(
            xmlsig.constants.TransformInclC14N,
            xmlsig.constants.TransformRsaSha1,
            "Signature"
        )
        ref = xmlsig.template.add_reference(
            signature, xmlsig.constants.TransformSha1, uri="", name="R1"
        )
        xmlsig.template.add_transform(ref, xmlsig.constants.TransformEnveloped)
        xmlsig.template.add_reference(
            signature, xmlsig.constants.TransformSha1, uri="#KI", name="RKI"
        )
        ki = xmlsig.template.ensure_key_info(signature, name='KI')
        data = xmlsig.template.add_x509_data(ki)
        xmlsig.template.x509_data_add_certificate(data)
        serial = xmlsig.template.x509_data_add_issuer_serial(data)
        xmlsig.template.x509_issuer_serial_add_issuer_name(serial)
        xmlsig.template.x509_issuer_serial_add_serial_number(serial)
        xmlsig.template.add_key_value(ki)
        qualifying = template.create_qualifying_properties(signature)
        utils.ensure_id(qualifying)
        utils.ensure_id(qualifying)
        props = template.create_signed_properties(
            qualifying, datetime=datetime.now()
        )
        template.add_claimed_role(props, "Supp")
        signed_do = template.ensure_signed_data_object_properties(props)
        template.add_data_object_format(
            signed_do,
            "#R1",
            identifier=ObjectIdentifier("Idenfitier0", "Description")
        )
        template.add_commitment_type_indication(
            signed_do,
            ObjectIdentifier("Idenfitier0", "Description"),
            qualifiers_type=["Tipo"]
        )

        template.add_commitment_type_indication(
            signed_do,
            ObjectIdentifier("Idenfitier1", references=["#R1"]),
            references=["#R1"]
        )
        template.add_data_object_format(
            signed_do,
            "#RKI",
            description="Desc",
            mime_type="application/xml",
            encoding='UTF-8'
        )
        root.append(signature)
        ctx = XAdESContext(ImpliedPolicy(xmlsig.constants.TransformSha1))
        with open(path.join(BASE_DIR, "data/keyStore.p12"), "rb") as key_file:
            ctx.load_pkcs12(crypto.load_pkcs12(key_file.read()))
        ctx.sign(signature)
        from lxml import etree
        print(etree.tostring(root))
        ctx.verify(signature)

x= TestXadesSignature()
x.test_create()
x.test_create_2()

回溯：

Exception has occurred: StopIteration
    exception: no description
      File "/home/sergio/Escritorio/PROYECTOSMAY2018/haciendaPython/src/lxml/lxml.etree.pyx", line 2821, in lxml.etree._ElementMatchIterator.__next__ (src/lxml/lxml.etree.c:75265)
      File "/home/sergio/Escritorio/PROYECTOSMAY2018/haciendaPython/haciendaCode/pythoncorella/test/test_xades.py", line 50, in test_create
        xmlsig.template.add_transform(ref, xmlsig.constants.TransformEnveloped)
      File "/home/sergio/Escritorio/PROYECTOSMAY2018/haciendaPython/haciendaCode/pythoncorella/test/test_xades.py", line 150, in <module>
        x.test_create()
      File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
        exec(code, run_globals)
      File "/usr/lib/python3.6/runpy.py", line 96, in _run_module_code
        mod_name, mod_spec, pkg_name, script_name)
      File "/usr/lib/python3.6/runpy.py", line 263, in run_path
        pkg_name=pkg_name, script_name=fname)

Answer 1

使用这个导入

import xmlsig
from lxml import etree
from OpenSSL import crypto
from xades import XAdESContext, template, utils
from xades.policy import GenericPolicyId

这是全球

POLICY_ENDPOINT = "politicadefirma/v2/politicadefirmav2.pdf"
SIGN_POLICY = f"http://facturaelectronica.dian.gov.co/{POLICY_ENDPOINT}"
CERTICAMARA_PFX = os.environ.get(
    'CERTICAMARA_PFX',
    '/path/to/certificate.pfx')

需要解析要签名的xml文件

parsed_file = etree.parse(file_path).getroot()

使用相应的转换内容创建签名模板

signature = xmlsig.template.create(
    xmlsig.constants.TransformInclC14N,
    xmlsig.constants.TransformRsaSha256,
    "Signature",
)

创建一个 uuid 和对签名的引用

    signature_id = utils.get_unique_id()
    ref = xmlsig.template.add_reference(
        signature, xmlsig.constants.TransformSha256, uri="", name="REF"
    )

为签名参考创建转换

    xmlsig.template.add_transform(ref, xmlsig.constants.TransformEnveloped)

添加其他引用

   xmlsig.template.add_reference(
        signature, xmlsig.constants.TransformSha256, uri="#" + signature_id
    )

   xmlsig.template.add_reference(
        signature, xmlsig.constants.TransformSha256, uri="#" + signature_id
    )

添加将要合并证书的部分

    ki = xmlsig.template.ensure_key_info(signature, name="KI")
    data = xmlsig.template.add_x509_data(ki)
    xmlsig.template.x509_data_add_certificate(data)
    serial = xmlsig.template.x509_data_add_issuer_serial(data)
    xmlsig.template.x509_issuer_serial_add_issuer_name(serial)
    xmlsig.template.x509_issuer_serial_add_serial_number(serial)
    xmlsig.template.add_key_value(ki)
    qualifying = template.create_qualifying_properties(
        signature, name=utils.get_unique_id(), etsi='xades'
    )

在签名中添加任何其他数据

    props = template.create_signed_properties(qualifying, name=signature_id)
    # Additional data for signature
    template.add_claimed_role(props, "Supp2")
    template.add_production_place(props, city="Bogotá Colombia")
    template.add_production_place(
        props, state="BCN", postal_code="08000", country="CO"
    )
    template.add_claimed_role(props, "SNE")

添加政策信息

    policy = GenericPolicyId(
        SIGN_POLICY,
        u"Política de firma para facturas"
        " electrónicas de la República de Colombia",
        xmlsig.constants.TransformSha256,
    )

将签名附加到解析后的文档

   parsed_file.append(signature)

打开 .pfx 或 .pem，这必须同时包含密钥和证书

   with open(CERTICAMARA_ANDES_PFX, "rb") as key_file:
        certificate = crypto.load_pkcs12(key_file.read(), 'filepassword')

将证书和策略添加到 ctx 以便在下一步中签名

    ctx = XAdESContext(
        policy,
        certificate.get_certificate().to_cryptography(),
    )

将证书加载到 ctx 并执行签名

   ctx.load_pkcs12(certificate)
   ctx.sign(signature)

将签名移动到所需位置，您可以更改以适合您的浇注姿势。

    parsed_file[0][position][0].append(signature)

创建新的 xml 签名文件

    et = etree.ElementTree(parsed_file)
    
    nfs_name = 'Name of the signed file'
    et.write(nfs_name, pretty_print=True,
             encoding='utf-8', xml_declaration=True)

我在我的国家的一个电子发票签名项目中使用了这个，考虑到 Enric Tobella 的源代码与包相比是领先的。使用源代码，您可以添加多个证书，而软件包只允许您使用一个，这是我发现的唯一区别。

如何在Python中使用Xades-EPES标准进行签名？

1 个答案: