| /* |
| * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8259535 |
| * @summary ECDSA SignatureValue do not always have the specified length |
| * @modules java.xml.crypto |
| */ |
| |
| import org.w3c.dom.Document; |
| import org.w3c.dom.NodeList; |
| import org.xml.sax.InputSource; |
| |
| import javax.xml.crypto.dsig.*; |
| import javax.xml.crypto.dsig.dom.DOMSignContext; |
| import javax.xml.crypto.dsig.keyinfo.KeyInfo; |
| import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory; |
| import javax.xml.crypto.dsig.keyinfo.X509Data; |
| import javax.xml.crypto.dsig.keyinfo.X509IssuerSerial; |
| import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec; |
| import javax.xml.crypto.dsig.spec.TransformParameterSpec; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMResult; |
| import javax.xml.transform.dom.DOMSource; |
| import java.io.StringReader; |
| import java.math.BigInteger; |
| import java.security.Provider; |
| import java.security.Security; |
| import java.security.*; |
| import java.security.spec.AlgorithmParameterSpec; |
| import java.security.spec.PKCS8EncodedKeySpec; |
| import java.util.*; |
| |
| public class ShortECDSA { |
| |
| public static final String XML = "<testXmlFile>\n" |
| + "\t<element>Value</element>\n" |
| + "</testXmlFile>"; |
| |
| private static final String PRIVATE_KEY_BASE_64 = |
| "MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgP6yNCRsISznuzY4D" |
| + "0cwkBjgV8uu2lQ2tCPxdam7Fx9OhRANCAAS33BazN06tOnXsLYatPvmkrEVDyRWj" |
| + "yzxlCU+en8PPJ4ETUGRhz8h1fAELEkKS0Cky5M61oQVyiSxHaXhunH29"; |
| |
| private static final XMLSignatureFactory FAC = |
| XMLSignatureFactory.getInstance("DOM"); |
| |
| public static void main(String[] args) throws Exception { |
| DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); |
| factory.setNamespaceAware(true); |
| Document document = factory.newDocumentBuilder(). |
| parse(new InputSource(new StringReader(XML))); |
| |
| PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec( |
| Base64.getDecoder().decode(PRIVATE_KEY_BASE_64)); |
| KeyFactory kf = KeyFactory.getInstance("EC"); |
| PrivateKey privateKey = kf.generatePrivate(keySpec); |
| |
| // Remove SunEC so neither its ASN.1 or P1363 format ECDSA will be used |
| Security.removeProvider("SunEC"); |
| Security.addProvider(new MyProvider()); |
| |
| Document signedDocument = XmlSigningUtils.signDocument(document, privateKey); |
| NodeList nodeList = signedDocument.getElementsByTagName("SignatureValue"); |
| byte[] sig = Base64.getMimeDecoder().decode( |
| nodeList.item(0).getFirstChild().getNodeValue()); |
| if (sig.length != 64) { |
| System.out.println("Length: " + sig.length); |
| //System.out.println(HexFormat.ofDelimiter(":").formatHex(sig)); |
| for (int i = 0; i < sig.length; ++i) { |
| System.out.print(String.format(i == 0 ? "%02x" : ":%02x", sig[i])); |
| } |
| System.out.println(); |
| throw new RuntimeException("Failed"); |
| } |
| } |
| |
| public static class XmlSigningUtils { |
| |
| public static Document signDocument(Document document, PrivateKey privateKey) |
| throws Exception { |
| DOMResult result = new DOMResult(); |
| TransformerFactory.newInstance().newTransformer() |
| .transform(new DOMSource(document), result); |
| Document newDocument = (Document) result.getNode(); |
| FAC.newXMLSignature(buildSignedInfo(), buildKeyInfo()) |
| .sign(new DOMSignContext(privateKey, newDocument.getDocumentElement())); |
| return newDocument; |
| } |
| |
| private static SignedInfo buildSignedInfo() |
| throws NoSuchAlgorithmException, InvalidAlgorithmParameterException { |
| return FAC.newSignedInfo( |
| FAC.newCanonicalizationMethod(CanonicalizationMethod.EXCLUSIVE, (C14NMethodParameterSpec) null), |
| FAC.newSignatureMethod(SignatureMethod.ECDSA_SHA256, null), |
| List.of(FAC.newReference( |
| "", |
| FAC.newDigestMethod(DigestMethod.SHA256, null), |
| List.of(FAC.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null))); |
| } |
| |
| private static KeyInfo buildKeyInfo() { |
| KeyInfoFactory keyInfoFactory = FAC.getKeyInfoFactory(); |
| X509IssuerSerial x509IssuerSerial = keyInfoFactory |
| .newX509IssuerSerial("CN=Me", BigInteger.ONE); |
| X509Data x509Data = keyInfoFactory.newX509Data(Collections.singletonList(x509IssuerSerial)); |
| return keyInfoFactory.newKeyInfo(Collections.singletonList(x509Data)); |
| } |
| } |
| |
| // Only provide SHA256withECDSA, no P1363 format. This triggers the convertASN1toXMLDSIG translation. |
| public static class MyProvider extends Provider { |
| MyProvider() { |
| super("MyProvider", "1", "My provider"); |
| put("Signature.SHA256withECDSA", MyECDSA.class.getName()); |
| } |
| } |
| |
| public static class MyECDSA extends SignatureSpi { |
| |
| // Hardcoded signature with short r and s |
| public static byte[] hardcoded; |
| |
| static { |
| hardcoded = new byte[68]; |
| // Fill in with a number <128 so it will look like a |
| // correct ASN.1 encoding for positive numbers. |
| Arrays.fill(hardcoded, (byte) 0x55); |
| hardcoded[0] = 0x30; // SEQUENCE OF |
| hardcoded[1] = 66; // 2 [tag,len,31] components |
| hardcoded[2] = hardcoded[35] = 2; // Each being an INTEGER... |
| hardcoded[3] = hardcoded[36] = 31; // ... of 31 bytes long |
| } |
| |
| protected void engineInitVerify(PublicKey publicKey) { |
| } |
| |
| protected void engineInitSign(PrivateKey privateKey) { |
| } |
| |
| protected void engineUpdate(byte b) { |
| } |
| |
| protected void engineUpdate(byte[] b, int off, int len) { |
| } |
| |
| protected byte[] engineSign() { |
| return hardcoded; |
| } |
| |
| protected boolean engineVerify(byte[] sigBytes) { |
| return false; |
| } |
| |
| protected void engineSetParameter(String param, Object value) { |
| } |
| |
| protected Object engineGetParameter(String param) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| protected void engineSetParameter(AlgorithmParameterSpec params) { |
| } |
| |
| protected AlgorithmParameters engineGetParameters() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| protected int engineSign(byte[] outbuf, int offset, int len) { |
| System.arraycopy(hardcoded, 0, outbuf, offset, hardcoded.length); |
| return hardcoded.length; |
| } |
| } |
| } |