| Цитата(jk1 @ 4.11.2010, 09:24) | | Цитата |
есть еще варианты?)
|
На основании приведенного нет. Вы не могли бы запостить несколько классов целиком, чтобы я мог воспроизвести проблему? Особенно интересуют классы ECP и Message. |
да, без проблем.
ECP
| Код |
package testrsa;
import java.io.UnsupportedEncodingException;
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.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
public class ECP
{
private static Key publicKey = null;
private static Key privateKey = null;
private static final int sizeKeys = 1024;
public ECP()
{
}
static
{
KeyPairGenerator kpg;
try
{
kpg = KeyPairGenerator.getInstance("RSA");
kpg.initialize(sizeKeys);
KeyPair kp = kpg.genKeyPair();
publicKey = kp.getPublic();
privateKey = kp.getPrivate();
}
catch (NoSuchAlgorithmException ex)
{
System.out.println(ex.getMessage());
}
}
public static Message signMessage(Message message)
{
try
{
if(publicKey == null || privateKey == null)
return null;
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(message.getDataBytes());
byte[] hash = md.digest();
System.out.println("encode");
System.out.println(publicKey.toString());
System.out.println(privateKey.toString());
byte[] sign = encrypt(hash);
String signStr = Base64.encodeToString(sign, false);
message.setLengthSign(signStr.length());
message.addSignToMessage(signStr);
byte[] decrypt;
decrypt = decrypt(Base64.decode(message.getSign()));
System.out.println(Arrays.toString(decrypt));
//message.addSignTest(sign);
return message;
}
catch (NoSuchAlgorithmException ex)
{
System.out.println(ex.getMessage());
return null;
}
}
public static boolean verify(Message message)
{
try
{
if(publicKey == null || privateKey == null)
return false;
if(!message.isIsSign())
return false;
MessageDigest md = MessageDigest.getInstance("MD5");
String data = message.getMessage();
System.out.println("decode");
System.out.println(publicKey.toString());
System.out.println(privateKey.toString());
byte[] decrypt;
decrypt = decrypt(Base64.decode(message.getSign()));
md.update(data.getBytes());
byte[] hash = md.digest();
System.out.println("Verify:");
System.out.println(Arrays.toString(decrypt));
System.out.println(Arrays.toString(hash));
return Arrays.equals(decrypt, hash);
}
catch (NoSuchAlgorithmException ex)
{
System.out.println(ex.getMessage());
return false;
}
}
private static byte[] encrypt(byte[] data)
{
Cipher cipher;
byte[] cipherData = null;
try
{
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
cipherData = cipher.doFinal(data);
}
catch (NoSuchAlgorithmException ex)
{
System.err.println(ex.getMessage());
}
catch (NoSuchPaddingException ex)
{
System.err.println(ex.getMessage());
}
catch (InvalidKeyException ex)
{
System.err.println(ex.getMessage());
}
catch (IllegalBlockSizeException ex)
{
System.err.println(ex.getMessage());
}
catch (BadPaddingException ex)
{
System.err.println(ex.getMessage());
}
finally
{
return cipherData;
}
}
private static byte[] decrypt(byte[] data)
{
Cipher cipher;
byte[] cipherData = null;
try
{
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, publicKey);
cipherData = cipher.doFinal(data);
}
catch (NoSuchAlgorithmException ex)
{
System.err.println(ex.getMessage());
}
catch (NoSuchPaddingException ex)
{
System.err.println(ex.getMessage());
}
catch (InvalidKeyException ex)
{
System.err.println(ex.getMessage());
}
catch (IllegalBlockSizeException ex)
{
System.err.println(ex.getMessage());
}
catch (BadPaddingException ex)
{
System.err.println(ex.getMessage());
}
finally
{
return cipherData;
}
}
}
|
Message
| Код |
package testrsa;
public class Message
{
private String message;
private boolean isSign = false;
private int lengthSign = 0;
private byte[] signTest;
public Message(String message)
{
this.message = message;
}
public boolean isIsSign()
{
return isSign;
}
public void setIsSign(boolean isSign)
{
this.isSign = isSign;
}
public int getLengthSign()
{
return lengthSign;
}
public void setLengthSign(int lengthSign)
{
this.lengthSign = lengthSign;
}
public String getMessage()
{
return message;
}
public void setMessage(String message)
{
this.message = message;
}
public byte[] getDataBytes()
{
return this.message.getBytes();
}
public void addSignToMessage(String sign)
{
this.message += sign;
this.setIsSign(true);
}
public String getSign()
{
if(this.isSign)
{
return this.message.substring(this.message.length() - this.lengthSign);
}
else
{
return null;
}
}
public String getData()
{
if(this.isSign)
{
return this.message.substring(0 , this.message.length() - this.lengthSign);
}
else
{
return null;
}
}
public void addSignTest(byte[] sign)
{
this.signTest = sign;
this.setIsSign(true);
}
public byte[] getSignTest()
{
return this.signTest;
}
}
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