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.BufferedReader;
047    import java.io.FileInputStream;
048    import java.io.FileOutputStream;
049    import java.io.InputStream;
050    import java.io.InputStreamReader;
051    import java.io.OutputStream;
052    import java.io.PrintWriter;
053    import java.math.BigInteger;
054    import java.util.Arrays;
055    import java.util.HashSet;
056    
057    import iaik.pkcs.pkcs11.Mechanism;
058    import iaik.pkcs.pkcs11.MechanismInfo;
059    import iaik.pkcs.pkcs11.Module;
060    import iaik.pkcs.pkcs11.Session;
061    import iaik.pkcs.pkcs11.Token;
062    import iaik.pkcs.pkcs11.TokenException;
063    import iaik.pkcs.pkcs11.objects.DSAPrivateKey;
064    import iaik.pkcs.pkcs11.objects.DSAPublicKey;
065    import iaik.pkcs.pkcs11.objects.Key;
066    import iaik.pkcs.pkcs11.objects.Object;
067    
068    
069    
070    /**
071     * Creates and verifies a signature on a token. The hash is calculated outside
072     * the token. Notice that many tokens do not support verification. In this case
073     * you will get an exception when the progrom tries to verify the signature
074     * on the token.
075     *
076     * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
077     * @version 0.1
078     * @invariants
079     */
080    public class DSASignAndVerify {
081    
082      static BufferedReader input_;
083    
084      static PrintWriter output_;
085    
086      static {
087        try {
088          //output_ = new PrintWriter(new FileWriter("SignAndVerify_output.txt"), true);
089          output_ = new PrintWriter(System.out, true);
090          input_ = new BufferedReader(new InputStreamReader(System.in));
091        } catch (Throwable thr) {
092          thr.printStackTrace();
093          output_ = new PrintWriter(System.out, true);
094          input_ = new BufferedReader(new InputStreamReader(System.in));
095       }
096      }
097    
098      public static void main(String[] args) {
099        if ((args.length != 2) && (args.length != 3)) {
100          printUsage();
101          System.exit(1);
102        }
103    
104        try {
105    
106            Module pkcs11Module = Module.getInstance(args[0]);
107            pkcs11Module.initialize(null);
108    
109            Token token = Util.selectToken(pkcs11Module, output_, input_);
110            if (token == null) {
111              output_.println("We have no token to proceed. Finished.");
112              output_.flush();
113              System.exit(0);
114            }
115    
116            // first check out what attributes of the keys we may set
117            HashSet supportedMechanisms = new HashSet(Arrays.asList(token.getMechanismList()));
118    
119            MechanismInfo signatureMechanismInfo;
120            if (supportedMechanisms.contains(Mechanism.DSA_SHA1)) {
121              signatureMechanismInfo = token.getMechanismInfo(Mechanism.DSA_SHA1);
122            } else {
123              signatureMechanismInfo = null;
124              output_.println("The token does not support mechanism DSA_SHA1. Going to exit.");
125              System.exit(0);
126            }
127    
128            if ((signatureMechanismInfo == null) || !signatureMechanismInfo.isSign()) {
129              output_.println("The token does not support signing with mechanism DSA_SHA1. Going to exit.");
130              System.exit(0);
131            }
132    
133            Session session = Util.openAuthorizedSession(token, Token.SessionReadWriteBehavior.RO_SESSION, output_, input_);
134    
135            output_.println("################################################################################");
136            output_.println("find private signature key");
137            DSAPrivateKey templateSignatureKey = new DSAPrivateKey();
138            templateSignatureKey.getSign().setBooleanValue(Boolean.TRUE);
139    
140            KeyAndCertificate selectedSignatureKeyAndCertificate =
141                Util.selectKeyAndCertificate(session, templateSignatureKey, output_, input_);
142            if (selectedSignatureKeyAndCertificate == null) {
143              output_.println("We have no signature key to proceed. Finished.");
144              output_.flush();
145              System.exit(0);
146            }
147            Key signatureKey = selectedSignatureKeyAndCertificate.getKey();
148            output_.println("################################################################################");
149    
150    
151            output_.println("################################################################################");
152            output_.println("signing data from file: " + args[1]);
153    
154            InputStream dataInputStream = new FileInputStream(args[1]);
155    
156            //be sure that your token can process the specified mechanism
157            Mechanism signatureMechanism = Mechanism.DSA_SHA1;
158            // initialize for signing
159            session.signInit(signatureMechanism, signatureKey);
160    
161            byte[] dataBuffer = new byte[1024];
162            byte[] helpBuffer;
163            int bytesRead;
164    
165            // feed all data from the input stream to the message digest
166            while ((bytesRead = dataInputStream.read(dataBuffer)) >= 0) {
167              helpBuffer = new byte[bytesRead]; // we need a buffer that only holds what to send for signing
168              System.arraycopy(dataBuffer, 0, helpBuffer, 0, bytesRead);
169              session.signUpdate(helpBuffer);
170              Arrays.fill(helpBuffer, (byte) 0); // ensure that no data is left in the memory
171            }
172    
173            byte[] signatureValue = session.signFinal();
174    
175            Arrays.fill(dataBuffer, (byte) 0); // ensure that no data is left in the memory
176    
177            output_.println("The siganture value is: " + new BigInteger(1, signatureValue).toString(16));
178    
179            if (args.length == 3) {
180              output_.println("Writing signature to file: " + args[2]);
181    
182              OutputStream signatureOutput = new FileOutputStream(args[2]);
183              signatureOutput.write(signatureValue);
184              signatureOutput.flush();
185              signatureOutput.close();
186            }
187    
188            output_.println("################################################################################");
189    
190    
191            if ((signatureMechanismInfo == null) || !signatureMechanismInfo.isVerify()) {
192              output_.println("The token does not support verification with mechanism RSA_PKCS. Going to exit.");
193              System.exit(0);
194            }
195    
196            output_.println("################################################################################");
197            output_.println("find public verification key");
198            DSAPublicKey templateVerificationKey = new DSAPublicKey();
199            templateVerificationKey.getVerify().setBooleanValue(Boolean.TRUE);
200            // we search for a public key with the same ID
201            templateVerificationKey.getId().setByteArrayValue(signatureKey.getId().getByteArrayValue());
202    
203            session.findObjectsInit(templateVerificationKey);
204    
205            Object[] foundVerificationKeyObjects = session.findObjects(1); // find first
206    
207            DSAPublicKey verificationKey = null;
208            if (foundVerificationKeyObjects.length > 0) {
209              verificationKey = (DSAPublicKey) foundVerificationKeyObjects[0];
210              output_.println("________________________________________________________________________________");
211              output_.println(verificationKey);
212              output_.println("________________________________________________________________________________");
213           } else {
214              output_.println("No matching public key found!");
215              System.exit(0);
216            }
217            session.findObjectsFinal();
218    
219            output_.println("################################################################################");
220    
221    
222            output_.println("################################################################################");
223            output_.println("verifying signature");
224    
225            dataInputStream = new FileInputStream(args[1]);
226    
227            // feed all data from the input stream to the message digest
228            while ((bytesRead = dataInputStream.read(dataBuffer)) >= 0) {
229              helpBuffer = new byte[bytesRead]; // we need a buffer that only holds what to send for signing
230              System.arraycopy(dataBuffer, 0, helpBuffer, 0, bytesRead);
231              session.signUpdate(helpBuffer);
232              Arrays.fill(helpBuffer, (byte) 0); // ensure that no data is left in the memory
233            }
234    
235            //be sure that your token can process the specified mechanism
236            Mechanism verificationMechanism = Mechanism.DSA_SHA1;
237            // initialize for signing
238            session.verifyInit(verificationMechanism, verificationKey);
239    
240            try {
241              session.verifyFinal(signatureValue); // throws an exception upon unsuccessful verification
242              output_.println("Verified the signature successfully");
243            } catch (TokenException ex) {
244              output_.println("Verification FAILED: " + ex.getMessage());
245            }
246    
247            output_.println("################################################################################");
248    
249    
250            session.closeSession();
251            pkcs11Module.finalize(null);
252    
253        } catch (Throwable thr) {
254          thr.printStackTrace();
255        } finally {
256          output_.close();
257        }
258      }
259    
260      public static void printUsage() {
261        output_.println("Usage: DSASignAndVerify <PKCS#11 module> <file to be signed> [<signature value file>]");
262        output_.println(" e.g.: DSASignAndVerify pk2priv.dll data.dat signature.bin");
263        output_.println("The given DLL must be in the search path of the system.");
264      }
265    
266    }