package serictly;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
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 sun.misc.resources.*;;
public class EncrypImpl implements Encryp{
public byte[] decryption(String s) {
KeyGenerator keygen;
SecretKey deskey = null ;
Cipher c = null ;
byte[] enc=null;
try {
keygen = KeyGenerator.getInstance("AES");
deskey = keygen.generateKey();
try {
c = Cipher.getInstance("AES");
} catch (NoSuchPaddingException e) {
e.printStackTrace();
}
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
String msg =s;
System.out.println("文明是:"+msg);
try {
c.init(Cipher.ENCRYPT_MODE, deskey);
byte[] src = msg.getBytes();
try {
enc = c.doFinal(src);
System.out.println("+++"+enc);
System.out.println("密文是:"+new String(enc));
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
} catch (InvalidKeyException e) {
e.printStackTrace();
}
return enc;
}
public String encryption(byte[] s) {
KeyGenerator keygen;
SecretKey deskey = null ;
Cipher c = null ;
System.out.println(s);
try {
keygen = KeyGenerator.getInstance("DESede");
deskey = keygen.generateKey();
try {
c = Cipher.getInstance("DESede");
} catch (NoSuchPaddingException e) {
e.printStackTrace();
}
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
try {
c.init(Cipher.DECRYPT_MODE, deskey);
try {
byte[] dec = c.doFinal(s);
System.out.println("文明是:"+new String (dec));
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
} catch (InvalidKeyException e) {
e.printStackTrace();
}
return null;
}
}在加密时就没错误，但是解密时就错误了，
javax.crypto.BadPaddingException: Given final block not properly padded
at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..)
at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..)
at com.sun.crypto.provider.DESedeCipher.engineDoFinal(DashoA13*..)
at javax.crypto.Cipher.doFinal(DashoA13*..)
at serictly.EncrypImpl.encryption(EncrypImpl.java:88)
at serictly.s.main(s.java:14)
