Android™
Android™
XML Signature Multiple External References
See more XML Digital Signatures Examples
Demonstrates how to add multiple external references to an XML digital signature.Chilkat Android™ Downloads
// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;
import android.app.Activity;
import com.chilkatsoft.*;
import android.widget.TextView;
import android.os.Bundle;
public class SimpleActivity extends Activity {
private static final String TAG = "Chilkat";
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean success = false;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example creates the following signed XML with multiple external references:
// <?xml version="1.0" encoding="UTF-8"?>
// <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4">
// <ds:SignedInfo>
// <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
// <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0" URI="https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1" URI="https://isus.ezdrowie.gov.pl/fhir/Encounter/124/_history/22">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2" URI="https://isus.ezdrowie.gov.pl/fhir/Condition/125/_history/1">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3" URI="https://isus.ezdrowie.gov.pl/fhir/Procedure/126/_history/1">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops">
// <ds:Transforms>
// <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
// </ds:Transforms>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// </ds:SignedInfo>
// <ds:SignatureValue Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue">...</ds:SignatureValue>
// <ds:KeyInfo>
// <ds:X509Data>
// <ds:X509Certificate>...</ds:X509Certificate>
// <ds:X509SubjectName>...</ds:X509SubjectName>
// <ds:X509IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </ds:X509IssuerSerial>
// </ds:X509Data>
// </ds:KeyInfo>
// <ds:Object>
// <xades:QualifyingProperties xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#" Target="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4">
// <xades:SignedProperties Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops">
// <xades:SignedSignatureProperties>
// <xades:SigningTime>2021-06-02T07:10:13.306+02:00</xades:SigningTime>
// <xades:SigningCertificate>
// <xades:Cert>
// <xades:CertDigest>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </xades:CertDigest>
// <xades:IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </xades:IssuerSerial>
// </xades:Cert>
// <xades:Cert>
// <xades:CertDigest>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </xades:CertDigest>
// <xades:IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </xades:IssuerSerial>
// </xades:Cert>
// <xades:Cert>
// <xades:CertDigest>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </xades:CertDigest>
// <xades:IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </xades:IssuerSerial>
// </xades:Cert>
// </xades:SigningCertificate>
// </xades:SignedSignatureProperties>
// </xades:SignedProperties>
// </xades:QualifyingProperties>
// </ds:Object>
// </ds:Signature>
//
success = true;
CkXmlDSigGen gen = new CkXmlDSigGen();
gen.put_SigLocation("");
gen.put_SigLocationMod(0);
// Note: ID's simply need to be unique values in the signed XML document. They don't necessarily need to be GUID/UUID formatted.
gen.put_SigId("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4");
gen.put_SigNamespacePrefix("ds");
gen.put_SigNamespaceUri("http://www.w3.org/2000/09/xmldsig#");
gen.put_SigValueId("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue");
gen.put_SignedInfoCanonAlg("C14N");
gen.put_SignedInfoDigestMethod("sha256");
// Create an Object to be added to the Signature.
CkXml object1 = new CkXml();
object1.put_Tag("xades:QualifyingProperties");
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#");
object1.AddAttribute("xmlns:xades141","http://uri.etsi.org/01903/v1.4.1#");
object1.AddAttribute("Target","#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4");
object1.UpdateAttrAt("xades:SignedProperties",true,"Id","xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT");
// This assumes there are 3 certs in the certificate chain: The signing certificate, an intermediate root, and the root CA.
// Remove the lines with "Cert[2]" if there is no intermediate root...
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod",true,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2","TO BE GENERATED BY CHILKAT");
gen.AddObject("",object1.getXml(),"","");
CkHttp http = new CkHttp();
CkBinData bd = new CkBinData();
String url = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456";
success = http.QuickGetBd(url,bd);
if (success != true) {
Log.i(TAG, http.lastErrorText());
return;
}
// -------- Reference 1 --------
gen.AddExternalBinaryRef(url,bd,"sha256","");
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0");
// -------- Reference 2 --------
bd.Clear();
url = "https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1";
success = http.QuickGetBd(url,bd);
if (success != true) {
Log.i(TAG, http.lastErrorText());
return;
}
gen.AddExternalBinaryRef(url,bd,"sha256","");
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1");
// -------- Reference 3 --------
bd.Clear();
url = "https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1";
success = http.QuickGetBd(url,bd);
if (success != true) {
Log.i(TAG, http.lastErrorText());
return;
}
gen.AddExternalBinaryRef(url,bd,"sha256","");
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2");
// -------- Reference 4 --------
bd.Clear();
url = "https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1";
success = http.QuickGetBd(url,bd);
if (success != true) {
Log.i(TAG, http.lastErrorText());
return;
}
gen.AddExternalBinaryRef(url,bd,"sha256","");
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3");
// -------- Reference 5 --------
gen.AddObjectRef("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops","sha256","C14N","","http://uri.etsi.org/01903#SignedProperties");
// Provide a certificate + private key. (PFX password is test123)
CkCert cert = new CkCert();
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
if (success != true) {
Log.i(TAG, cert.lastErrorText());
return;
}
gen.SetX509Cert(cert,true);
gen.put_KeyInfoType("X509Data");
gen.put_X509Type("IssuerSerial,SubjectName,Certificate");
// This will be an enveloping signature where the Signature element
// is the XML document root, the signed data is contained within Object
// tag(s) within the Signature.
// Therefore, pass an empty sbXml to CreateXmlDsigSb.
CkStringBuilder sbXml = new CkStringBuilder();
gen.put_Behaviors("IndentedSignature");
// Sign the XML...
success = gen.CreateXmlDSigSb(sbXml);
if (success != true) {
Log.i(TAG, gen.lastErrorText());
return;
}
// -----------------------------------------------
// Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",false);
Log.i(TAG, sbXml.getAsString());
// ----------------------------------------
// Verify the signature we just produced...
CkXmlDSig verifier = new CkXmlDSig();
success = verifier.LoadSignatureSb(sbXml);
if (success != true) {
Log.i(TAG, verifier.lastErrorText());
return;
}
boolean verified = verifier.VerifySignature(true);
if (verified != true) {
Log.i(TAG, verifier.lastErrorText());
return;
}
Log.i(TAG, "This signature was successfully verified.");
}
static {
System.loadLibrary("chilkat");
// Note: If the incorrect library name is passed to System.loadLibrary,
// then you will see the following error message at application startup:
//"The application <your-application-name> has stopped unexpectedly. Please try again."
}
}