java 3des加密算法求解
我下载了一个3des加密的工具,得到如下结果：
原文：06111111FFFFFFFF
密钥：11111111111111111111111111111111
密文：C1335C0C5EC48958
这个也是我需要的结果，但是我用java始终没有得到这样的结果。求相关java代码，紧急，谢谢
[解决办法]
我用java写的测试,生成的结果前面的8字节与你相同,只是多个8个字节,供参考:
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
public class TestDes {
private static final String Algorithm = "DESede";
public static byte[] encryptMode(byte[] keybyte, byte[] src) {
try {
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
public static byte[] decryptMode(byte[] keybyte, byte[] src) {
try {
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
//转换成十六进制字符串
public static String byte2hex(byte[] b) {
String hs="";
String stmp="";
for (int n=0;n<b.length;n++) {
stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length()==1) hs=hs+"0"+stmp;
else hs=hs+stmp;
if (n<b.length-1) hs=hs+":";
}
return hs.toUpperCase();
}
public static void main(String[] args)
{
final byte[] keyBytes = { 0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11
,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11};
byte[] szSrc = {0x06,0x11,0x11,0x11,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF};
System.out.println("加密前的字符串:" + byte2hex(szSrc));
byte[] encoded = encryptMode(keyBytes,szSrc );
System.out.println("加密后的字符串:" + byte2hex(encoded));
byte[] srcBytes = decryptMode(keyBytes, encoded);
System.out.println("解密后的字符串:" + byte2hex(srcBytes));
}
}
import java.security.Key;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
public class BcTest {
static void test() throws Exception {
byte[] data = { 0x06, 0x11, 0x11, 0x11, (byte) 0xFF, (byte) 0xFF,
(byte) 0xFF, (byte) 0xFF };
byte[] key1 = new byte[] { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
0x11 };
byte[] key2 = new byte[] { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
0x11 };
byte[] key3 = new byte[] { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
0x11 };
// 3DES ciphertext = EK3(DK2(EK1(plaintext)))
byte[] crypt = encrypt(decrypt(encrypt(data, key1), key2), key3);
// 3DES plaintext = DK1(EK2(DK3(ciphertext)))
byte[] plain = decrypt(encrypt(decrypt(crypt, key3), key2), key1);
System.out.println(" key: " + ByteUtil.bytes2HexSpace(key1) + " "
+ ByteUtil.bytes2HexSpace(key2) + " "
+ ByteUtil.bytes2HexSpace(key3));
System.out.println(" data: " + ByteUtil.bytes2HexSpace(data));
System.out.println("crypt: " + ByteUtil.bytes2HexSpace(crypt));
System.out.println("plain: " + ByteUtil.bytes2HexSpace(plain));
}
public static void main(String[] args) throws Exception {
test();
}
public static byte[] decrypt(byte[] crypt, byte[] key) throws Exception {
Key k = toKey(key);
Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, k);
return cipher.doFinal(crypt);
}
public static byte[] encrypt(byte[] data, byte[] key) throws Exception {
Key k = toKey(key);
Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, k);
return cipher.doFinal(data);
}
public static SecretKey toKey(byte[] key) throws Exception {
KeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
return keyFactory.generateSecret(dks);
}
}
class ByteUtil {
private static final char HEX[] = "0123456789abcdef".toCharArray();
public static String bytes2HexSpace(byte bys[]) {
char chs[] = new char[(bys.length * 2 + bys.length) - 1];
int i = 0;
int offset = 0;
for (; i < bys.length; i++) {
if (i > 0)
chs[offset++] = ' ';
chs[offset++] = HEX[bys[i] >> 4 & 15];
chs[offset++] = HEX[bys[i] & 15];
}
return new String(chs);
}
}
/*output:
key: 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11
data: 06 11 11 11 ff ff ff ff
crypt: c1 33 5c 0c 5e c4 89 58
plain: 06 11 11 11 ff ff ff ff
*/
