001 /* Copyright (c) 2002 Graz University of Technology. All rights reserved. 002 * 003 * Redistribution and use in source and binary forms, with or without 004 * modification, are permitted provided that the following conditions are met: 005 * 006 * 1. Redistributions of source code must retain the above copyright notice, 007 * this list of conditions and the following disclaimer. 008 * 009 * 2. Redistributions in binary form must reproduce the above copyright notice, 010 * this list of conditions and the following disclaimer in the documentation 011 * and/or other materials provided with the distribution. 012 * 013 * 3. The end-user documentation included with the redistribution, if any, must 014 * include the following acknowledgment: 015 * 016 * "This product includes software developed by IAIK of Graz University of 017 * Technology." 018 * 019 * Alternately, this acknowledgment may appear in the software itself, if 020 * and wherever such third-party acknowledgments normally appear. 021 * 022 * 4. The names "Graz University of Technology" and "IAIK of Graz University of 023 * Technology" must not be used to endorse or promote products derived from 024 * this software without prior written permission. 025 * 026 * 5. Products derived from this software may not be called 027 * "IAIK PKCS Wrapper", nor may "IAIK" appear in their name, without prior 028 * written permission of Graz University of Technology. 029 * 030 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED 031 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 032 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 033 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE 034 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 035 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 036 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 037 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 038 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 039 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 040 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 041 * POSSIBILITY OF SUCH DAMAGE. 042 */ 043 044 package demo.pkcs.pkcs11; 045 046 import java.io.FileInputStream; 047 import java.io.IOException; 048 import java.io.InputStream; 049 import java.math.BigInteger; 050 import java.security.GeneralSecurityException; 051 import java.security.Security; 052 import java.security.Signature; 053 import java.security.cert.CertificateFactory; 054 import java.security.cert.X509Certificate; 055 056 import javax.crypto.Cipher; 057 058 import iaik.security.provider.IAIK; 059 import iaik.utils.Util; 060 061 062 063 public class VerifySignature { 064 065 protected X509Certificate certificate_; 066 067 protected Signature verifyEngine_; 068 069 public VerifySignature(X509Certificate certificate, String algorithm) 070 throws GeneralSecurityException 071 { 072 certificate_ = certificate; 073 // verifyEngine_ = Signature.getInstance(algorithm, "IAIK"); 074 verifyEngine_ = Signature.getInstance(algorithm); 075 verifyEngine_.initVerify(certificate.getPublicKey()); 076 } 077 078 public boolean verify(InputStream data, byte[] signature) 079 throws IOException, GeneralSecurityException 080 { 081 byte[] buffer = new byte[1024]; 082 int bytesRead; 083 084 while ((bytesRead = data.read(buffer, 0, buffer.length)) >= 0) { 085 verifyEngine_.update(buffer, 0, bytesRead); 086 } 087 088 return verifyEngine_.verify(signature) ; 089 } 090 091 public static void main(String[] args) { 092 if (args.length != 4) { 093 printUsage(); 094 System.exit(1); 095 } 096 097 try { 098 FileInputStream dataInput = new FileInputStream(args[0]); 099 byte[] signature = Util.readStream(new FileInputStream(args[1])); 100 FileInputStream certificateInput = new FileInputStream(args[2]); 101 Security.addProvider(new IAIK()); 102 //CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509", "IAIK"); 103 CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509"); 104 X509Certificate certificate = (X509Certificate) certificateFactory.generateCertificate(certificateInput); 105 106 VerifySignature verifier = new VerifySignature(certificate, args[3]); 107 108 if (verifier.verify(dataInput, signature)) { 109 System.out.println("Verified signature successfully."); 110 } else { 111 System.out.println("Signature is INVALID."); 112 Cipher rsa = Cipher.getInstance("RSA/ECB/NoPadding"); 113 rsa.init(Cipher.DECRYPT_MODE, certificate.getPublicKey()); 114 byte[] signedBlock = rsa.doFinal(signature); 115 System.out.println("Decrypted signature value is (hex):"); 116 System.out.println(new BigInteger(1, signedBlock).toString(16)); 117 } 118 119 } catch (Throwable thr) { 120 thr.printStackTrace(); 121 } 122 } 123 124 public static void printUsage() { 125 System.out.println("Usage: VerifySignature <data file> <signature file> <X.509 certificate file> <algorithm>"); 126 System.out.println(" e.g.: VerifySignature data.dat signature.bin signerCertificate.der SHA1withRSA"); 127 } 128 129 130 }