в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:10:05Z

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== javax.crypto.spec.PBEKeySpec ==



<source lang="java">

import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class MainClass {
public static void main(String[] args) throws Exception {
KeyGenerator kg = KeyGenerator.getInstance("DESede");
Key sharedKey = kg.generateKey();
String password = "password";
byte[] salt = "salt1234".getBytes();
PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);
PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
SecretKeyFactory kf = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
SecretKey passwordKey = kf.generateSecret(keySpec);
Cipher c = Cipher.getInstance("PBEWithMD5AndDES");
c.init(Cipher.WRAP_MODE, passwordKey, paramSpec);
byte[] wrappedKey = c.wrap(sharedKey);
c = Cipher.getInstance("DESede");
c.init(Cipher.ENCRYPT_MODE, sharedKey);
byte[] input = "input".getBytes();
byte[] encrypted = c.doFinal(input);
c = Cipher.getInstance("PBEWithMD5AndDES");
c.init(Cipher.UNWRAP_MODE, passwordKey, paramSpec);
Key unwrappedKey = c.unwrap(wrappedKey, "DESede", Cipher.SECRET_KEY);
c = Cipher.getInstance("DESede");
c.init(Cipher.DECRYPT_MODE, unwrappedKey);
System.out.println(new String(c.doFinal(encrypted)));
}
}

</source>

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в 17:43, 31 мая 2010

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