001package org.hl7.fhir.r4.utils; 002 003/* 004 Copyright (c) 2011+, HL7, Inc. 005 All rights reserved. 006 007 Redistribution and use in source and binary forms, with or without modification, 008 are permitted provided that the following conditions are met: 009 010 * Redistributions of source code must retain the above copyright notice, this 011 list of conditions and the following disclaimer. 012 * Redistributions in binary form must reproduce the above copyright notice, 013 this list of conditions and the following disclaimer in the documentation 014 and/or other materials provided with the distribution. 015 * Neither the name of HL7 nor the names of its contributors may be used to 016 endorse or promote products derived from this software without specific 017 prior written permission. 018 019 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 020 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 021 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 022 IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 024 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 025 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 026 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 027 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 028 POSSIBILITY OF SUCH DAMAGE. 029 030 */ 031 032import java.io.ByteArrayInputStream; 033import java.io.FileOutputStream; 034import java.io.OutputStream; 035import java.nio.file.Files; 036import java.nio.file.Paths; 037import java.security.KeyFactory; 038import java.security.PrivateKey; 039import java.security.PublicKey; 040import java.security.spec.PKCS8EncodedKeySpec; 041import java.security.spec.X509EncodedKeySpec; 042import java.util.Collections; 043 044import javax.xml.crypto.dsig.CanonicalizationMethod; 045import javax.xml.crypto.dsig.DigestMethod; 046import javax.xml.crypto.dsig.Reference; 047import javax.xml.crypto.dsig.SignatureMethod; 048import javax.xml.crypto.dsig.SignedInfo; 049import javax.xml.crypto.dsig.Transform; 050import javax.xml.crypto.dsig.XMLSignature; 051import javax.xml.crypto.dsig.XMLSignatureFactory; 052import javax.xml.crypto.dsig.dom.DOMSignContext; 053import javax.xml.crypto.dsig.keyinfo.KeyInfo; 054import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory; 055import javax.xml.crypto.dsig.keyinfo.KeyValue; 056import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec; 057import javax.xml.crypto.dsig.spec.TransformParameterSpec; 058import javax.xml.parsers.DocumentBuilder; 059import javax.xml.parsers.DocumentBuilderFactory; 060 061import org.hl7.fhir.utilities.Utilities; 062import org.hl7.fhir.utilities.xml.XmlGenerator; 063import org.w3c.dom.Document; 064 065public class DigitalSignatures { 066 067 public static PrivateKey getPrivateKey(String filename) throws Exception { 068 069 byte[] keyBytes = Files.readAllBytes(Paths.get(filename)); 070 071 PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes); 072 KeyFactory kf = KeyFactory.getInstance("RSA"); 073 return kf.generatePrivate(spec); 074 } 075 076 public static PublicKey getPublicKey(String filename) throws Exception { 077 078 byte[] keyBytes = Files.readAllBytes(Paths.get(filename)); 079 080 X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes); 081 KeyFactory kf = KeyFactory.getInstance("RSA"); 082 return kf.generatePublic(spec); 083 } 084 085 public static void main(String[] args) throws Exception { 086 // http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html 087 // 088 byte[] inputXml = "<Envelope xmlns=\"urn:envelope\">\r\n</Envelope>\r\n".getBytes(); 089 // load the document that's going to be signed 090 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 091 dbf.setNamespaceAware(true); 092 DocumentBuilder builder = dbf.newDocumentBuilder(); 093 Document doc = builder.parse(new ByteArrayInputStream(inputXml)); 094 095// // create a key pair 096// KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA"); 097// kpg.initialize(512); 098// KeyPair kp = kpg.generateKeyPair(); 099 PublicKey pub = getPublicKey("C:\\work\\fhirserver\\tests\\signatures\\public_key.der"); 100 PrivateKey priv = getPrivateKey("C:\\work\\fhirserver\\tests\\signatures\\private_key.der"); 101 102 // sign the document 103 DOMSignContext dsc = new DOMSignContext(priv, doc.getDocumentElement()); 104 XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM"); 105 106 Reference ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA1, null), 107 Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null); 108 SignedInfo si = fac.newSignedInfo( 109 fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null), 110 fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null), Collections.singletonList(ref)); 111 112 KeyInfoFactory kif = fac.getKeyInfoFactory(); 113 KeyValue kv = kif.newKeyValue(pub); 114 KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv)); 115 XMLSignature signature = fac.newXMLSignature(si, ki); 116 signature.sign(dsc); 117 118 OutputStream os = new FileOutputStream(Utilities.path("[tmp]", "java-digsig.xml")); 119 new XmlGenerator().generate(doc.getDocumentElement(), os); 120 } 121}