package mx.bigdata.sat.contabilidad_electronica;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.security.PrivateKey;
import java.security.Signature;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Map;
import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.util.JAXBSource;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import mx.bigdata.sat.ce_catalogo_cuentas.schema.Catalogo;
import mx.bigdata.sat.common.NamespacePrefixMapperImpl;
import mx.bigdata.sat.common.URIResolverImpl;
import mx.bigdata.sat.security.KeyLoaderEnumeration;
import mx.bigdata.sat.security.factory.KeyLoaderFactory;
import org.apache.commons.codec.binary.Base64;
import org.w3c.dom.Document;
import org.xml.sax.ErrorHandler;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
public final class CuentasContablesv11 {
private static final String XSLT = "/xslt/ce_catalogo_cuentas/CatalogoCuentas_1_1.xslt";
private static final String[] XSD = new String[] {
"/xsd/ce_catalogo_cuentas/CatalogoCuentas_1_1.xsd"
};
private static final String XML_HEADER = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
private static final String BASE_CONTEXT = "mx.bigdata.sat.ce_catalogo_cuentas.schema";
private final static Joiner JOINER = Joiner.on(':');
private final JAXBContext context ;
public static final ImmutableMap<String, String> PREFIXES =
ImmutableMap.of("http://www.sat.gob.mx/esquemas/ContabilidadE/1_1/CatalogoCuentas", "catalogocuentas",
"http://www.w3.org/2001/XMLSchema-instance","xsi");
// ,"http://www.sat.gob.mx/esquemas/ContabilidadE/1_1/CatalogoCuentas", "catalogocuentas"
private final Map<String, String> localPrefixes = Maps.newHashMap(PREFIXES);
/*************************************************************************************************************/
/*************************************************************************************************************/
private TransformerFactory tf;
// final Comprobante document;
final Catalogo document;
public CuentasContablesv11(InputStream in, String... contexts) throws Exception {
this.context = getContext(contexts);
this.document = load(in);
}
public CuentasContablesv11(Catalogo catalogo, String... contexts) throws Exception {
this.context = getContext(contexts);
this.document = copy(catalogo);
}
public void addNamespace(String uri, String prefix) {
localPrefixes.put(uri, prefix);
}
public void setTransformerFactory(TransformerFactory tf) {
this.tf = tf;
tf.setURIResolver(new URIResolverImpl());
}
public Catalogo sellarComprobante(PrivateKey key, X509Certificate cert) throws Exception {
sellar(key, cert);
return doGetCatalogo();
}
public void validar() throws Exception {
validar(null);
}
public void sellar(PrivateKey key, X509Certificate cert) throws Exception {
cert.checkValidity();
String signature = getSignature(key);
document.setSello(signature);
byte[] bytes = cert.getEncoded();
Base64 b64 = new Base64(-1);
String certStr = b64.encodeToString(bytes);
document.setCertificado(certStr);
BigInteger bi = cert.getSerialNumber();
document.setNoCertificado(new String(bi.toByteArray()));
}
public void validar(ErrorHandler handler) throws Exception {
SchemaFactory sf =
SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Source[] schemas = new Source[XSD.length];
for (int i = 0; i < XSD.length; i++) {
schemas[i] = new StreamSource(getClass().getResourceAsStream(XSD[i]));
}
Schema schema = sf.newSchema(schemas);
Validator validator = schema.newValidator();
if (handler != null) {
validator.setErrorHandler(handler);
}
validator.validate(new JAXBSource(context, document));
}
public void verificar() throws Exception {
String certStr = document.getCertificado();
Base64 b64 = new Base64();
byte[] cbs = b64.decode(certStr);
X509Certificate cert = KeyLoaderFactory.createInstance(KeyLoaderEnumeration.PUBLIC_KEY_LOADER,new ByteArrayInputStream(cbs)).getKey();
String sigStr = document.getSello();
byte[] signature = b64.decode(sigStr);
byte[] bytes = getOriginalBytes();
Signature sig = Signature.getInstance("SHA1withRSA");
sig.initVerify(cert);
sig.update(bytes);
boolean bool = sig.verify(signature);
if (!bool) {
throw new Exception("Invalid signature");
}
}
public void guardar(OutputStream out) throws Exception {
Marshaller m = context.createMarshaller();
m.setProperty("com.sun.xml.bind.namespacePrefixMapper", new NamespacePrefixMapperImpl(localPrefixes));
m.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
m.setProperty(Marshaller.JAXB_SCHEMA_LOCATION, "www.sat.gob.mx/esquemas/ContabilidadE/1_1/CatalogoCuentas " + "http://www.sat.gob.mx/esquemas/ContabilidadE/1_1/CatalogoCuentas/CatalogoCuentas_1_1.xsd");
byte[] xmlHeaderBytes = XML_HEADER.getBytes("UTF8");
out.write(xmlHeaderBytes);
m.marshal(document, out);
}
public String getCadenaOriginal() throws Exception {
byte[] bytes = getOriginalBytes();
return new String(bytes, "UTF8");
}
public static Catalogo newComprobante(InputStream in) throws Exception {
return load(in);
}
// public ComprobanteBase getComprobante() throws Exception {
// return new CFDv32ComprobanteBase(doGetCatalogo());
// }
Catalogo doGetCatalogo() throws Exception {
return copy(document);
}
byte[] getOriginalBytes() throws Exception {
JAXBSource in = new JAXBSource(context, document);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Result out = new StreamResult(baos);
TransformerFactory factory = tf;
if (factory == null) {
factory = TransformerFactory.newInstance();
factory.setURIResolver(new URIResolverImpl());
}
Transformer transformer = factory.newTransformer(new StreamSource(getClass().getResourceAsStream(XSLT)));
transformer.transform(in, out);
return baos.toByteArray();
}
String getSignature(PrivateKey key) throws Exception {
byte[] bytes = getOriginalBytes();
Signature sig = Signature.getInstance("SHA1withRSA");
sig.initSign(key);
sig.update(bytes);
byte[] signed = sig.sign();
Base64 b64 = new Base64(-1);
return b64.encodeToString(signed);
}
// FUNCIONES AUXILIARES
private static JAXBContext getContext(String[] contexts) throws Exception {
List<String> ctx = Lists.asList(BASE_CONTEXT, contexts);
return JAXBContext.newInstance(JOINER.join(ctx));
}
private static Catalogo load(InputStream source, String... contexts)
throws Exception {
JAXBContext context = getContext(contexts);
try {
Unmarshaller u = context.createUnmarshaller();
return (Catalogo) u.unmarshal(source);
} finally {
source.close();
}
}
// Defensive deep-copy
private Catalogo copy(Catalogo catalogo) throws Exception {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.newDocument();
Marshaller m = context.createMarshaller();
m.marshal(catalogo, doc);
Unmarshaller u = context.createUnmarshaller();
return (Catalogo) u.unmarshal(doc);
}
}