| Line | Hits | Source |
|---|---|---|
| 1 | /******************************************************************************* | |
| 2 | *InternetCafe is a software solution that helps the management of Cybercafes | |
| 3 | * according with the ITALIAN DECREE LAW ON ANTI-TERROR MEASURES, 27 JULY 2005. | |
| 4 | * Copyright (C) 2006 Guido Angelo Ingenito | |
| 5 | ||
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version 2 | |
| 9 | * of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
| 19 | *******************************************************************************/ | |
| 20 | package base.jdbs.cryptography.asymmetric; | |
| 21 | ||
| 22 | import java.io.BufferedInputStream; | |
| 23 | import java.io.File; | |
| 24 | import java.io.FileInputStream; | |
| 25 | import java.io.FileOutputStream; | |
| 26 | import java.security.Signature; | |
| 27 | ||
| 28 | 2 | import org.apache.log4j.Logger; |
| 29 | ||
| 30 | 3 | public class RSAAsymmetricCipher implements IAsymmetricCipher { |
| 31 | ||
| 32 | 1 | private static final transient Logger logger = Logger.getLogger(RSAAsymmetricCipher.class.getName()); |
| 33 | ||
| 34 | 0 | public void sign(File input, File output, base.jdbs.cryptography.asymmetric.PrivateKey privateKey) { |
| 35 | 0 | |
| 36 | 0 | try{ |
| 37 | ||
| 38 | 0 | /* Create a Signature object and initialize it with the private key */ |
| 39 | 0 | Signature rsa = Signature.getInstance("SHA1withRSA"); |
| 40 | 0 | rsa.initSign(privateKey.getValue()); |
| 41 | 0 | |
| 42 | 0 | /* Update and sign the data */ |
| 43 | 0 | FileInputStream fileInputStream = new FileInputStream(input); |
| 44 | 0 | BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream); |
| 45 | 0 | byte[] buffer = new byte[1024]; |
| 46 | 0 | int numRead; |
| 47 | 0 | while (bufferedInputStream.available() != 0) { |
| 48 | 0 | numRead = bufferedInputStream.read(buffer); |
| 49 | 0 | rsa.update(buffer, 0, numRead); |
| 50 | 0 | }; |
| 51 | ||
| 52 | 0 | bufferedInputStream.close(); |
| 53 | ||
| 54 | 0 | /* Now that all the data to be signed has been read in, |
| 55 | 0 | generate a signature for it */ |
| 56 | 0 | byte[] realSig = rsa.sign(); |
| 57 | 0 | |
| 58 | /* Save the signature in a file */ | |
| 59 | 0 | FileOutputStream sigfos = new FileOutputStream(output); |
| 60 | 0 | sigfos.write(realSig); |
| 61 | 0 | sigfos.close(); |
| 62 | 0 | } catch (Exception e) { |
| 63 | 0 | logger.error("Caught exception " + e.toString()); |
| 64 | 0 | } |
| 65 | 0 | } |
| 66 | 0 | |
| 67 | public boolean checkSignature(File signedInputFile, File dataFile, PublicKey publicKey) { | |
| 68 | try{ | |
| 69 | /* input the signature bytes */ | |
| 70 | 0 | FileInputStream sigfis = new FileInputStream(signedInputFile); |
| 71 | 0 | byte[] sigToVerify = new byte[sigfis.available()]; |
| 72 | 0 | sigfis.read(sigToVerify ); |
| 73 | ||
| 74 | 0 | sigfis.close(); |
| 75 | ||
| 76 | /* create a Signature object and initialize it with the public key */ | |
| 77 | 0 | Signature sig = Signature.getInstance("SHA1withRSA"); |
| 78 | 0 | sig.initVerify(publicKey.getValue()); |
| 79 | ||
| 80 | /* Update and verify the data */ | |
| 81 | ||
| 82 | 0 | FileInputStream datafis = new FileInputStream(dataFile); |
| 83 | 0 | BufferedInputStream bufin = new BufferedInputStream(datafis); |
| 84 | ||
| 85 | 0 | byte[] buffer = new byte[1024]; |
| 86 | int len; | |
| 87 | 0 | while (bufin.available() != 0) { |
| 88 | 0 | len = bufin.read(buffer); |
| 89 | 0 | sig.update(buffer, 0, len); |
| 90 | 0 | }; |
| 91 | ||
| 92 | 0 | bufin.close(); |
| 93 | ||
| 94 | ||
| 95 | 0 | boolean verifies = sig.verify(sigToVerify); |
| 96 | ||
| 97 | 0 | System.out.println("signature verifies: " + verifies); |
| 98 | ||
| 99 | 0 | return verifies; |
| 100 | ||
| 101 | 0 | } catch (Exception e) { |
| 102 | 0 | System.err.println("Caught exception " + e.toString()); |
| 103 | } | |
| 104 | 0 | return false; |
| 105 | } | |
| 106 | } |
|
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |