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twofishc.java
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/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
import com.mongodb.BasicDBObject;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import iaik.security.cipher.Twofish;
import iaik.security.provider.IAIK;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
/**
*
* @author funky
*/
public class twofishc {
public String encrypt(String str) throws NoSuchProviderException {
try {
SecretKey key= KeyGenerator.getInstance("Twofish", "IAIK").generateKey();
Cipher ecipher = Cipher.getInstance("Twofish/CBC/PKCS5Padding", "IAIK");
ecipher.init(Cipher.ENCRYPT_MODE, key);
byte[] keyBytes = key.getEncoded();
SecretKeySpec secretKeySpec = new SecretKeySpec(keyBytes, "Twofish");
byte[] utf8 = str.getBytes("UTF8");
byte[] enc = ecipher.doFinal(utf8);
crypter.ivBytes = ecipher.getIV();
IvParameterSpec ivt = new IvParameterSpec(crypter.ivBytes);
String s =new sun.misc.BASE64Encoder().encode(enc);
crypter.count++;
DBObject en = new BasicDBObject("id",crypter.count)
.append("string",s);
crypter.collection.insert(en);
//crypter.vec.add(key);
crypter.sks.add(secretKeySpec);
crypter.iv.add(ivt);
crypter.indext.add(crypter.count);
return s;
} catch (BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
} catch (NoSuchAlgorithmException e) {
} catch (InvalidKeyException e) {
} catch (NoSuchPaddingException e) {
}
return null;
}
public String decrypt(int i) throws InvalidKeyException, IOException, NoSuchProviderException, InvalidAlgorithmParameterException {
String str = null;
SecretKey key = null;
int j;
int c=0;
for (j=0;j<crypter.indext.size();j++) {
if(crypter.indext.get(j)==i) {
c++;
break;
}
}
if(c==0) {
return new String("Wrong Algorithm chosen");
}
try {
Cipher dcipher = Cipher.getInstance("Twofish/CBC/PKCS5Padding", "IAIK");
DBObject query = new BasicDBObject("id", i);
DBCursor cursor= crypter.collection.find(query);
str=(String)cursor.one().get("string");
dcipher.init(Cipher.DECRYPT_MODE, crypter.sks.get(j), crypter.iv.get(j));
byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
byte[] utf8 = dcipher.doFinal(dec);
return new String(utf8, "UTF8");
} catch (BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
} catch (NoSuchAlgorithmException e) {
} catch (NoSuchPaddingException e) {
}
return null;
}
}