001package org.hl7.fhir.r5.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 */ 031 032 033 034import java.io.ByteArrayInputStream; 035import java.io.FileOutputStream; 036import java.io.OutputStream; 037import java.nio.file.Files; 038import java.nio.file.Paths; 039import java.security.KeyFactory; 040import java.security.PrivateKey; 041import java.security.PublicKey; 042import java.security.spec.PKCS8EncodedKeySpec; 043import java.security.spec.X509EncodedKeySpec; 044import java.util.Collections; 045 046import javax.xml.crypto.dsig.CanonicalizationMethod; 047import javax.xml.crypto.dsig.DigestMethod; 048import javax.xml.crypto.dsig.Reference; 049import javax.xml.crypto.dsig.SignatureMethod; 050import javax.xml.crypto.dsig.SignedInfo; 051import javax.xml.crypto.dsig.Transform; 052import javax.xml.crypto.dsig.XMLSignature; 053import javax.xml.crypto.dsig.XMLSignatureFactory; 054import javax.xml.crypto.dsig.dom.DOMSignContext; 055import javax.xml.crypto.dsig.keyinfo.KeyInfo; 056import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory; 057import javax.xml.crypto.dsig.keyinfo.KeyValue; 058import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec; 059import javax.xml.crypto.dsig.spec.TransformParameterSpec; 060import javax.xml.parsers.DocumentBuilder; 061import javax.xml.parsers.DocumentBuilderFactory; 062 063import org.hl7.fhir.utilities.Utilities; 064import org.hl7.fhir.utilities.xml.XmlGenerator; 065import org.w3c.dom.Document; 066 067public class DigitalSignatures { 068 069 public static PrivateKey getPrivateKey(String filename) throws Exception { 070 071 byte[] keyBytes = Files.readAllBytes(Paths.get(filename)); 072 073 PKCS8EncodedKeySpec spec = 074 new PKCS8EncodedKeySpec(keyBytes); 075 KeyFactory kf = KeyFactory.getInstance("RSA"); 076 return kf.generatePrivate(spec); 077 } 078 079 public static PublicKey getPublicKey(String filename) throws Exception { 080 081 byte[] keyBytes = Files.readAllBytes(Paths.get(filename)); 082 083 X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes); 084 KeyFactory kf = KeyFactory.getInstance("RSA"); 085 return kf.generatePublic(spec); 086 } 087 088 public static void main(String[] args) throws Exception { 089 // http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html 090 // 091 byte[] inputXml = "<Envelope xmlns=\"urn:envelope\">\r\n</Envelope>\r\n".getBytes(); 092 // load the document that's going to be signed 093 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 094 dbf.setNamespaceAware(true); 095 DocumentBuilder builder = dbf.newDocumentBuilder(); 096 Document doc = builder.parse(new ByteArrayInputStream(inputXml)); 097 098// // create a key pair 099// KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA"); 100// kpg.initialize(512); 101// KeyPair kp = kpg.generateKeyPair(); 102 PublicKey pub = getPublicKey("C:\\work\\fhirserver\\tests\\signatures\\public_key.der"); 103 PrivateKey priv = getPrivateKey("C:\\work\\fhirserver\\tests\\signatures\\private_key.der"); 104 105 // sign the document 106 DOMSignContext dsc = new DOMSignContext(priv, doc.getDocumentElement()); 107 XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM"); 108 109 Reference ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA1, null), Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null); 110 SignedInfo si = fac.newSignedInfo(fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null), 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}