DES加密算法在java和C#中相同结果的代码事例
先看一下java代码：
/*
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*/
package test;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
public class Des {
private static final String PASSWORD_CRYPT_KEY = "abcdefgh";
private final static String DES = "DES";
public static void main(String[] args){
System.out.println("加密："+encrypt("123456"));
}
public static byte[] encrypt(byte[] src, byte[] key) throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(DES);
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(src);
}
public static byte[] decrypt(byte[] src, byte[] key) throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(DES);
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(src);
}
/**
** 密码解密
*/
public final static String decrypt(String data) {
try {
return new String(decrypt(hexStringToBytes(data),PASSWORD_CRYPT_KEY.getBytes()));
} catch (Exception e) {
}
return null;
}
/**
** 密码加密
*/
public final static String encrypt(String password) {
try {
return bytesToHexString(encrypt(password.getBytes(), PASSWORD_CRYPT_KEY.getBytes()));
} catch (Exception e) {
}
return null;
}
public static String bytesToHexString(byte[] src){
StringBuilder stringBuilder = new StringBuilder("");
if (src == null || src.length <= 0) {
return null;
}
for (int i = 0; i < src.length; i++) {
int v = src[i] & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
stringBuilder.append(0);
}
stringBuilder.append(hv);
}
return stringBuilder.toString().toUpperCase();
}
public static byte[] hexStringToBytes(String hexString) {
if (hexString == null || hexString.equals("")) {
return null;
}
hexString = hexString.toUpperCase();
int length = hexString.length() / 2;
char[] hexChars = hexString.toCharArray();
byte[] d = new byte[length];
for (int i = 0; i < length; i++) {
int pos = i * 2;
d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
}
return d;
}
private static byte charToByte(char c) {
return (byte) "0123456789ABCDEF".indexOf(c);
}
}
上面java代码执行的结果如下：
run:
加密：B074DDFFD7B162E9
成功构建 (总时间: 1 秒)
下面在看一下c#的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
namespace Temp
{
class DES
{
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
public static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
dCSP.Mode = CipherMode.ECB;
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return BytesToHexString(mStream.ToArray());
}
catch
{
return encryptString;
}
}
public static string BytesToHexString(byte[] bytes)
{
StringBuilder returnStr = new StringBuilder();
if (bytes != null || bytes.Length == 0)
{
for (int i = 0; i < bytes.Length; i++)
{
returnStr.Append(bytes[i].ToString("X2"));
}
}
return returnStr.ToString();
}
}
}
上面代码中要想C#的加密结果与java中的代码结果一致最关键是dCSP.Mode = CipherMode.ECB;这一行代码。
最后运行的效果如下：
