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Assinando um XML de NFe

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stavarengo edited this page Sep 29, 2012 · 1 revision

A partir do momento em que você tiver um arquivo XML de NF-e criado, deverá assinar digitalmente este arquivo, utilizando o certificado digital. É isto mesmo, ou seja, o certificado digital serve para assinar o arquivo XML, dando autenticidade ao mesmo. A etapa de assinar o XML significa, na prática, que serão inseridas algumas tags na estrutura do XML, tags estas referentes à assinatura.

Para assinar um arquivo XML de NF-e utilize o método ToolsNFePHP::signXML(). Este método espera dois parâmetros, o primeiro é a string contendo a estrutura do XML, ou seja, o XML propriamente dito. E o segundo parâmetro é a tag do XML a ser assinada, muito provavelmente será a tag "infNFe".

Por exemplo, dado o XML fictício abaixo:

<?xml version="1.0" encoding="utf-8"?>
<NFe xmlns="http://www.portalfiscal.inf.br/nfe">
<infNFe Id="NFe43120103987283000133550010000006241607910981" versao="2.00">
   <ide>
     <cUF>43</cUF>
     <cNF>60791098</cNF>
     <natOp>5.101 - VENDA</natOp>
     <indPag>1</indPag>
     <mod>55</mod>
     <serie>1</serie>
     <nNF>624</nNF>
     <dEmi>2012-01-25</dEmi>
     <tpNF>1</tpNF>
     <cMunFG>4313409</cMunFG>
     <tpImp>1</tpImp>
     <tpEmis>1</tpEmis>
     <cDV>1</cDV>
     <tpAmb>2</tpAmb>
     <finNFe>1</finNFe>
     <procEmi>0</procEmi>
     <verProc>2.02</verProc>
   </ide>
   <emit>
     <CNPJ>03987283000133</CNPJ>
     <xNome>MINHA EMPRESA TESTE LTDA.</xNome>
     <xFant>MINHA EMPRESA FANTASIA TESTE</xFant>
     <enderEmit>
        <xLgr>RUA TESTE</xLgr>
        <nro>123</nro>
        <xBairro>CENTRO</xBairro>
        <cMun>4312345</cMun>
        <xMun>PORTO ALEGRE</xMun>
        <UF>RS</UF>
        <CEP>93000000</CEP>
        <cPais>1058</cPais>
        <xPais>BRASIL</xPais>
        <fone>5111223344</fone>
     </enderEmit>
     <IE>0868689965</IE>
     <CRT>1</CRT>
  </emit>
  <dest>
     <CNPJ>99999999000191</CNPJ>
     <xNome>NF-E EMITIDA EM AMBIENTE DE HOMOLOGACAO - SEM VALOR FISCAL</xNome>
     <enderDest>
        <xLgr>AV. DOS TESTES</xLgr>
        <nro>202</nro>
        <xBairro>CENTRO</xBairro>
        <cMun>4369854</cMun>
        <xMun>PORTO ALEGRE</xMun>
        <UF>RS</UF>
        <CEP>93000000</CEP>
        <cPais>1058</cPais>
        <xPais>BRASIL</xPais>
     </enderDest>
     <IE>ISENTO</IE>
  </dest>
  <det nItem="1">
     <prod>
        <cProd>15036</cProd>
        <cEAN/>
        <xProd>PRODUTO TESTE REF 123123</xProd>
        <NCM>84123123</NCM>
        <CFOP>5101</CFOP>
        <uCom>UN</uCom>
        <qCom>1.0000</qCom>
        <vUnCom>590.0000</vUnCom>
        <vProd>590.00</vProd>
        <cEANTrib/>
        <uTrib>UN</uTrib>
        <qTrib>1.0000</qTrib>
        <vUnTrib>590.0000</vUnTrib>
        <indTot>1</indTot>
     </prod>
         <imposto>
            <ICMS>
               <ICMSSN101>
                  <orig>0</orig>
                  <CSOSN>101</CSOSN>
                  <pCredSN>2.82</pCredSN>
                  <vCredICMSSN>16.64</vCredICMSSN>
               </ICMSSN101>
            </ICMS>
            <PIS>
               <PISOutr>
                  <CST>99</CST>
                  <vBC>0.00</vBC>
                  <pPIS>0.00</pPIS>
                  <vPIS>0.00</vPIS>
               </PISOutr>
            </PIS>
            <COFINS>
               <COFINSOutr>
                  <CST>99</CST>
                  <vBC>0.00</vBC>
                  <pCOFINS>0.00</pCOFINS>
                  <vCOFINS>0.00</vCOFINS>
               </COFINSOutr>
            </COFINS>
         </imposto>
      </det>
      <total>
         <ICMSTot>
            <vBC>0.00</vBC>
            <vICMS>0.00</vICMS>
            <vBCST>0.00</vBCST>
            <vST>0.00</vST>
            <vProd>590.00</vProd>
            <vFrete>0.00</vFrete>
            <vSeg>0.00</vSeg>
            <vDesc>0.00</vDesc>
            <vII>0.00</vII>
            <vIPI>0.00</vIPI>
            <vPIS>0.00</vPIS>
            <vCOFINS>0.00</vCOFINS>
            <vOutro>0.00</vOutro>
            <vNF>590.00</vNF>
         </ICMSTot>
      </total>
      <transp>
         <modFrete>1</modFrete>
      </transp>
      <cobr>
         <dup>
            <nDup>624</nDup>
            <dVenc>2013-02-08</dVenc>
            <vDup>590.00</vDup>
         </dup>
      </cobr>
      <infAdic>
         <infCpl>TESTE DE INFORMACOES ADICIONAIS</infCpl>
      </infAdic>
   </infNFe>
</NFe>

Após ser assinado, ele ficará assim:

<?xml version="1.0" encoding="utf-8"?><NFe xmlns="http://www.portalfiscal.inf.br/nfe"><infNFe Id="NFe43120103987283000133550010000006241607910981" versao="2.00"><ide><cUF>43</cUF><cNF>60791098</cNF><natOp>5.101 - VENDA</natOp><indPag>1</indPag><mod>55</mod><serie>1</serie><nNF>624</nNF><dEmi>2012-01-25</dEmi><tpNF>1</tpNF><cMunFG>4313409</cMunFG><tpImp>1</tpImp><tpEmis>1</tpEmis><cDV>1</cDV><tpAmb>2</tpAmb><finNFe>1</finNFe><procEmi>0</procEmi><verProc>2.02</verProc></ide><emit><CNPJ>03987283000133</CNPJ><xNome>MINHA EMPRESA TESTE LTDA.</xNome><xFant>MINHA EMPRESA FANTASIA TESTE</xFant><enderEmit><xLgr>RUA TESTE</xLgr><nro>123</nro><xBairro>CENTRO</xBairro><cMun>4312345</cMun><xMun>PORTO ALEGRE</xMun><UF>RS</UF><CEP>93000000</CEP><cPais>1058</cPais><xPais>BRASIL</xPais><fone>5111223344</fone></enderEmit><IE>0868689965</IE><CRT>1</CRT></emit><dest><CNPJ>99999999000191</CNPJ><xNome>NF-E EMITIDA EM AMBIENTE DE HOMOLOGACAO - SEM VALOR FISCAL</xNome><enderDest><xLgr>AV. DOS TESTES</xLgr><nro>202</nro><xBairro>CENTRO</xBairro><cMun>4369854</cMun><xMun>PORTO ALEGRE</xMun><UF>RS</UF><CEP>93000000</CEP><cPais>1058</cPais><xPais>BRASIL</xPais></enderDest><IE>ISENTO</IE></dest><det nItem="1"><prod><cProd>15036</cProd><cEAN/><xProd>PRODUTO TESTE REF 123123</xProd><NCM>84123123</NCM><CFOP>5101</CFOP><uCom>UN</uCom><qCom>1.0000</qCom><vUnCom>590.0000</vUnCom><vProd>590.00</vProd><cEANTrib/><uTrib>UN</uTrib><qTrib>1.0000</qTrib><vUnTrib>590.0000</vUnTrib><indTot>1</indTot></prod><imposto><ICMS><ICMSSN101><orig>0</orig><CSOSN>101</CSOSN><pCredSN>2.82</pCredSN><vCredICMSSN>16.64</vCredICMSSN></ICMSSN101></ICMS><PIS><PISOutr><CST>99</CST><vBC>0.00</vBC><pPIS>0.00</pPIS><vPIS>0.00</vPIS></PISOutr></PIS><COFINS><COFINSOutr><CST>99</CST><vBC>0.00</vBC><pCOFINS>0.00</pCOFINS><vCOFINS>0.00</vCOFINS></COFINSOutr></COFINS></imposto></det><total><ICMSTot><vBC>0.00</vBC><vICMS>0.00</vICMS><vBCST>0.00</vBCST><vST>0.00</vST><vProd>590.00</vProd><vFrete>0.00</vFrete><vSeg>0.00</vSeg><vDesc>0.00</vDesc><vII>0.00</vII><vIPI>0.00</vIPI><vPIS>0.00</vPIS><vCOFINS>0.00</vCOFINS><vOutro>0.00</vOutro><vNF>590.00</vNF></ICMSTot></total><transp><modFrete>1</modFrete></transp><cobr><dup><nDup>624</nDup><dVenc>2013-02-08</dVenc><vDup>590.00</vDup></dup></cobr><infAdic><infCpl>TESTE DE INFORMACOES ADICIONAIS</infCpl></infAdic></infNFe><Signature xmlns="http://www.w3.org/2000/09/xmldsig#"><SignedInfo><CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/><SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/><Reference URI="#NFe43120101951363000175550010000006241607910981"><Transforms><Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/><Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/></Transforms><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>w9ST4BFe2YG5i/ifHycd4fBMQ=</DigestValue></Reference></SignedInfo><SignatureValue>El98tgmZRnakzzbLqjzuLDlWzL5cZJc8Xg8BOnffj5SIfqhuSvq/v7UOy6Sz80u4dV1GCFuycOV4wHdIfitzlmnfiDJkjIpjrrYOwOpiL5DCXgPWcbRwAVjIA04T/d6AL/dErwKvpS1GBAySz/Ds6KX03jtheFNgCpyeg=</SignatureValue><KeyInfo><X509Data><X509Certificate>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</X509Certificate></X509Data></KeyInfo></Signature></NFe>

Script de exemplo para assinar um XML:

<?php
/*
 * Exemplo de assinatura de um XML de NF-e
 *
 */

require_once('../libs/ToolsNFePHP.class.php');

// Instancia um objeto da classe "Tools" da API.
$tools = new ToolsNFePHP();

// Esta variável deve conter o XML inteiro da NF-e a ser assinada.
$sXml = "<?xml version="1.0" encoding="utf-8"?><NFe ... </NFe>";

// Chama o método "signXML()" da API.
$sXmlAssinado = $this->toolsNFe->signXML($sXml, 'infNFe');

// Caso a assinatura tenha falhado por algum motivo, o método retorna FALSE.
if ($sXmlAssinado === FALSE) {
   die("Erro na assinatura do XML de NF-e");
}

// Se o método não retornou FALSE, então ele retornou a nova string do XML com as tags referentes à assinatura.
var_dump($sXmlAssinado);
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