1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
| package com.bnpparibas.offremobile.presentation.struts.action;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.util.Date;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import com.bnpparibas.offremobile.presentation.base.action.AbstractOffreMobileBaseAction;
import com.bnpparibas.offremobile.presentation.base.exception.OffreMobileException;
import com.bnpparibas.offremobile.presentation.base.session.SessionOffreMobileUtilisateur;
import com.thoughtworks.xstream.core.util.Base64Encoder;
public class CryptageAction extends AbstractOffreMobileBaseAction{
private static final Logger log = Logger.getLogger(CryptageAction.class);
protected ActionForward doBefore(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
ActionForward actionforward = super.doBefore(mapping, form, request,
response);
return actionforward;
}
protected ActionForward performAction(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws Exception {
if(log.isDebugEnabled()){
log.debug("[Enter CryptageAction]");
}
SessionOffreMobileUtilisateur sessionOffreMobileUtilisateur = (SessionOffreMobileUtilisateur)request.getSession().getAttribute(SessionOffreMobileUtilisateur.OFFREMOBILE_CLE_SESSION_OBJECT);
Date date = sessionOffreMobileUtilisateur.getDateServeur().getDate();
Security.addProvider(new BouncyCastleProvider());
String chaineAcrypter = "BonjourJeSuisCrypté";
long timstamp = date.getTime();
StringBuffer sb = new StringBuffer(255);
sb.append(chaineAcrypter).append(timstamp);
StringBuffer sbdf = new StringBuffer(255);
sbdf = shaHashing(sb.toString());
request.getSession().setAttribute("messageHashé", sbdf.toString());
byte[] input = sbdf.toString().getBytes();
Cipher cipher = null;
KeyPairGenerator generator = null;
Key pubKey = null;
Key privKey = null;
byte[] cipherText = null;
byte[] plainText = null;
String url64 = null;
try {
cipher = Cipher.getInstance("RSA/None/OAEPWithSHA1AndMGF1Padding", "BC");
generator = KeyPairGenerator.getInstance("RSA", "BC");
generator.initialize(2048);
KeyPair pair = generator.generateKeyPair();
pubKey = pair.getPublic();
privKey = pair.getPrivate();
//Cryptage
cipher.init(Cipher.ENCRYPT_MODE, privKey);
cipherText = cipher.doFinal(input);
System.out.println("MESSAGE CRYPTE : "+new String(cipherText));
//Decryptage
cipher.init(Cipher.DECRYPT_MODE, pubKey);
plainText = cipher.doFinal(cipherText);
System.out.println("MESSAGE DECYPTE : "+ new String(plainText));
Base64Encoder encoder = new Base64Encoder();
url64 = encoder.encode(cipherText);
} catch (NoSuchAlgorithmException e) {
log.error(e);
throw new OffreMobileException(e.getMessage(), e.getCause());
} catch (NoSuchProviderException e) {
log.error(e);
throw new OffreMobileException(e.getMessage(), e.getCause());
} catch (NoSuchPaddingException e) {
log.error(e);
throw new OffreMobileException(e.getMessage(), e.getCause());
} catch (InvalidKeyException e) {
log.error(e);
throw new OffreMobileException(e.getMessage(), e.getCause());
} catch (IllegalBlockSizeException e) {
log.error(e);
throw new OffreMobileException(e.getMessage(), e.getCause());
} catch (BadPaddingException e) {
log.error(e);
throw new OffreMobileException(e.getMessage(), e.getCause());
}
request.getSession().setAttribute("clePub", pubKey.toString());
request.getSession().setAttribute("messageacrypter2", new String(sb));
request.getSession().setAttribute("messageCrypte", new String(cipherText));
request.getSession().setAttribute("messageDecrypte", new String (plainText));
request.getSession().setAttribute("base64Url", url64);
request.getSession().setAttribute("popup", true);
String adresseDuFichier = "c:/cryptage.txt";
try{
FileWriter fw = new FileWriter(adresseDuFichier, true);
BufferedWriter output = new BufferedWriter(fw);
output.write("Cle publique : "+pubKey.toString()+"\r\n"+"Message a crypter : "+new String(sb)+"\r\n"+"Message crypté : "+new String(cipherText)+"\r\n"+"Message decrypté : "+new String (plainText)+"\r\n"+"Message encodé en base64 : "+url64);
output.flush();
output.close();
System.out.println("fichier créé");
}catch(IOException ioe){
System.out.print("Erreur : ");
ioe.printStackTrace();
}
if(log.isDebugEnabled()){
log.debug("[Exit CryptageAction]");
}
return getSuccessForward(mapping);
}
public StringBuffer shaHashing(String chaine){
StringBuffer sb = new StringBuffer(255);
try {
MessageDigest md = MessageDigest.getInstance("SHA-256");
md.update(chaine.getBytes());
byte byteData[] = md.digest();
for(int i=0;i<byteData.length;i++){
sb.append(Integer.toString((byteData[i]&0xff)+0x100, 16).substring(1));
}
} catch (NoSuchAlgorithmException e) {
log.error(e);
}
return sb;
}
} |
Partager