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import java.security.Security;
import java.util.Scanner;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.swing.text.Utilities;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
/**
* Example of using PBE with a PBEParameterSpec
*/
public class PBEWithParamsExample
{
public static void main(String[] args) throws Exception
{
Security.addProvider(new BouncyCastleProvider());
Scanner scan = new Scanner(System.in);
System.out.println("Entrer le texte à chiffrer");
String plaintext=scan.nextLine();
byte[] input = plaintext.getBytes();
byte[] keyBytes = new byte[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72,
0x06, 0x75, 0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03,
(byte) 0xdd, (byte) 0xd9, 0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6,
0x08, (byte) 0xb8 };
// encrypt the data using precalculated keys
Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");
cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(
ivBytes));
byte[] out = cEnc.doFinal(input);
// decrypt the data using PBE
char[] password = "password".toCharArray();
byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
int iterationCount = 2048;
PBEKeySpec pbeSpec = new PBEKeySpec(password);
SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
SecretKey sKey = keyFact.generateSecret(pbeSpec);
cDec.init(Cipher.DECRYPT_MODE, sKey, new PBEParameterSpec(salt, iterationCount));
System.out.println("cipher : " + new String(out));
System.out.println("gen key: " + new String(sKey.getEncoded()));
// System.out.println("gen iv : " + new String(cDec.getIV()));
//System.out.println("plain : " + new String(cDec.doFinal(out)));
}
} |
