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.FileOutputStream;
048    import java.io.InputStream;
049    import java.io.OutputStream;
050    import java.security.Security;
051    import java.security.SignatureException;
052    
053    import iaik.pkcs.pkcs7.SignedDataStream;
054    import iaik.pkcs.pkcs7.SignerInfo;
055    import iaik.security.provider.IAIK;
056    import iaik.x509.X509Certificate;
057    
058    
059    
060    /**
061     * This helper class simply verifies the signature of a PKCS#7 signed data
062     * object and extracts the verified content data.
063     *
064     * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
065     * @version 0.1
066     * @invariants
067     */
068    public class VerifyPKCS7SignedData {
069    
070      public static void main(String[] args) {
071        if ((args.length != 1) && (args.length != 2)) {
072          printUsage();
073          System.exit(1);
074        }
075    
076        try {
077          Security.addProvider(new IAIK());
078    
079          System.out.println("Verifying PKCS#7 signed data from file: " + args[0]);
080          InputStream dataInput = new FileInputStream(args[0]);
081    
082          SignedDataStream signedData = new SignedDataStream(dataInput);
083    
084          InputStream contentStream = signedData.getInputStream();
085          OutputStream verifiedContentStream = (args.length == 2) ? new FileOutputStream(args[1]) : null;
086          byte[] buffer = new byte[1024];
087          int bytesRead;
088    
089          if (verifiedContentStream != null) {
090            while ((bytesRead = contentStream.read(buffer)) > 0) {
091              verifiedContentStream.write(buffer, 0, bytesRead);
092            }
093            verifiedContentStream.flush();
094            verifiedContentStream.close();
095            System.out.println("Verified content written to: " + args[1]);
096            System.out.println("________________________________________________________________________________");
097          } else {
098            System.out.println("The signed content data is: ");
099            System.out.println("________________________________________________________________________________");
100            while ((bytesRead = contentStream.read(buffer)) > 0) {
101              System.out.write(buffer, 0, bytesRead);
102            }
103            System.out.println();
104            System.out.println("________________________________________________________________________________");
105          }
106    
107          // get the signer infos
108           SignerInfo[] signerInfos = signedData.getSignerInfos();
109           // verify the signatures
110           for (int i=0; i < signerInfos.length; i++) {
111             try {
112                // verify the signature for SignerInfo at index i
113                X509Certificate signerCertificate = signedData.verify(i);
114                // if the signature is OK the certificate of the signer is returned
115                System.out.println("Signature OK from signer with certificate: ");
116                System.out.println(signerCertificate);
117                System.out.println();
118             } catch (SignatureException ex) {
119                // if the signature is not OK a SignatureException is thrown
120                System.out.println("Signature ERROR from signer with certificate: ");
121                System.out.println(signedData.getCertificate(signerInfos[i].getIssuerAndSerialNumber()));
122                System.out.println();
123                ex.printStackTrace();
124             }
125           }
126    
127        } catch (Throwable thr) {
128          thr.printStackTrace();
129        }
130      }
131    
132      public static void printUsage() {
133        System.out.println("Usage: VerifyPKCS7SignedData <PKCS#7 signed data file> <verified content data>");
134        System.out.println(" e.g.: VerifyPKCS7SignedData signedData.p7 verifiedContentData.dat");
135      }
136    
137    
138    }