PBEWithMD5AndDES加密

java 中的
加密：加密后的密文字符串=PasswordUtil.encrypt(待加密的明文字符串,生成密钥时所使用的密码,盐值)
解密：解密后的明文字符串=PasswordUtil.decrypt(待解密的密文字符串,生成密钥时所使用的密码,盐值)
C# 中的
加密：加密后的密文字符串=Rcode(待加密的明文字符串,生成密钥时所使用的密码,盐值)

JAVA

import java.io.File;
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class PasswordUtil {

	/**
	 * JAVA6支持以下任意一种算法 PBEWITHMD5ANDDES PBEWITHMD5ANDTRIPLEDES
	 * PBEWITHSHAANDDESEDE PBEWITHSHA1ANDRC2_40 PBKDF2WITHHMACSHA1
	 * */

	/**
	 * 定义使用的算法为:PBEWITHMD5andDES算法
	 */
	public static final String ALGORITHM = "PBEWithMD5AndDES";//加密算法
	public static final String Salt = "1111323423";//密钥，此处自定义

	/**
	 * 定义迭代次数为100次
	 */
	private static final int ITERATIONCOUNT = 100;//此处自定义

	/**
	 * 获取加密算法中使用的盐值,解密中使用的盐值必须与加密中使用的相同才能完成操作. 盐长度必须为8字节
	 * 
	 * @return byte[] 盐值
	 * */
	public static byte[] getSalt() throws Exception {
		// 实例化安全随机数
		SecureRandom random = new SecureRandom();
		// 产出盐
		return random.generateSeed(8);
	}

	public static byte[] getStaticSalt() {
		// 产出盐
		return Salt.getBytes();
	}

	/**
	 * 根据PBE密码生成一把密钥
	 * 
	 * @param password
	 *            生成密钥时所使用的密码
	 * @return Key PBE算法密钥
	 * */
	private static Key getPBEKey(String password) {
		// 实例化使用的算法
		SecretKeyFactory keyFactory;
		SecretKey secretKey = null;
		try {
			keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
			// 设置PBE密钥参数
			PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
			// 生成密钥
			secretKey = keyFactory.generateSecret(keySpec);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return secretKey;
	}

	/**
	 * 加密明文字符串
	 * 
	 * @param plaintext
	 *            待加密的明文字符串
	 * @param password
	 *            生成密钥时所使用的密码
	 * @param salt
	 *            盐值
	 * @return 加密后的密文字符串
	 * @throws Exception
	 */
	public static String encrypt(String plaintext, String password, byte[] salt) {

		Key key = getPBEKey(password);
		byte[] encipheredData = null;
		PBEParameterSpec parameterSpec = new PBEParameterSpec(salt, ITERATIONCOUNT);
		try {
			Cipher cipher = Cipher.getInstance(ALGORITHM);

			cipher.init(Cipher.ENCRYPT_MODE, key, parameterSpec);

			encipheredData = cipher.doFinal(plaintext.getBytes());
		} catch (Exception e) {
		}
		return bytesToHexString(encipheredData);
	}

	/**
	 * 解密密文字符串
	 * 
	 * @param ciphertext
	 *            待解密的密文字符串
	 * @param password
	 *            生成密钥时所使用的密码(如需解密,该参数需要与加密时使用的一致)
	 * @param salt
	 *            盐值(如需解密,该参数需要与加密时使用的一致)
	 * @return 解密后的明文字符串
	 * @throws Exception
	 */
	public static String decrypt(String ciphertext, String password, byte[] salt) {

		Key key = getPBEKey(password);
		byte[] passDec = null;
		PBEParameterSpec parameterSpec = new PBEParameterSpec(getStaticSalt(), ITERATIONCOUNT);
		try {
			Cipher cipher = Cipher.getInstance(ALGORITHM);

			cipher.init(Cipher.DECRYPT_MODE, key, parameterSpec);

			passDec = cipher.doFinal(hexStringToBytes(ciphertext));
		}

		catch (Exception e) {
			// TODO: handle exception
		}
		return new String(passDec);
	}

	/**
	 * 将字节数组转换为十六进制字符串
	 * 
	 * @param src
	 *            字节数组
	 * @return
	 */
	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();
	}

	/**
	 * 将十六进制字符串转换为字节数组
	 * 
	 * @param hexString
	 *            十六进制字符串
	 * @return
	 */
	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);
	}

	public static void main(String[] args) {
		File f = new File("C:/a/2.txt");
		f.delete();
	}
}

C#

public class PKCSKeyGenerator
{
    byte[] key = new byte[8], iv = new byte[8];
    DESCryptoServiceProvider des = new DESCryptoServiceProvider();

    public byte[] Key { get { return key; } }
    public byte[] IV { get { return iv; } }
    public ICryptoTransform Encryptor { get { return des.CreateEncryptor(key, iv); } }
    public ICryptoTransform Decryptor { get { return des.CreateDecryptor(key, iv); } } // 多加一个Decryptor用于解密

    public PKCSKeyGenerator() { }
    public PKCSKeyGenerator(String keystring, byte[] salt, int md5iterations, int segments)
    {
        Generate(keystring, salt, md5iterations, segments);
    }

    public ICryptoTransform Generate(String keystring, byte[] salt, int md5iterations, int segments)
    {
        int HASHLENGTH = 16;    //MD5 bytes
        byte[] keymaterial = new byte[HASHLENGTH * segments]; //to store concatenated Mi hashed results

        // --- get secret password bytes ----
        byte[] psbytes;
        psbytes = Encoding.UTF8.GetBytes(keystring);

        // --- concatenate salt and pswd bytes into fixed data array ---
        byte[] data00 = new byte[psbytes.Length + salt.Length];
        Array.Copy(psbytes, data00, psbytes.Length);  //copy the pswd bytes
        Array.Copy(salt, 0, data00, psbytes.Length, salt.Length);//concatenate the salt bytes

        // ---- do multi-hashing and concatenate results  D1, D2 ...  
        // into keymaterial bytes ----
        MD5 md5 = new MD5CryptoServiceProvider();
        byte[] result = null;
        byte[] hashtarget = new byte[HASHLENGTH + data00.Length];   //fixed length initial hashtarget

        for (int j = 0; j < segments; j++)
        {
            // ----  Now hash consecutively for md5iterations times ------
            if (j == 0) result = data00;       //initialize
            else
            {
                Array.Copy(result, hashtarget, result.Length);
                Array.Copy(data00, 0, hashtarget, result.Length, data00.Length);
                result = hashtarget;
            }

            for (int i = 0; i < md5iterations; i++)
                result = md5.ComputeHash(result);

            Array.Copy(result, 0, keymaterial, j * HASHLENGTH, result.Length);  //concatenate to keymaterial
        }

        Array.Copy(keymaterial, 0, key, 0, 8);
        Array.Copy(keymaterial, 8, iv, 0, 8);
        return Encryptor;
    }
}

调用方法
public static String Rcode(String message,String key，sbyte[] salt)
{		
		int count = 100; // 迭代次数

    PKCSKeyGenerator cipher = new PKCSKeyGenerator(key, Array.ConvertAll(salt, a => (byte)a), count, 1);

    byte[] src = Encoding.UTF8.GetBytes(message);
    byte[] result = cipher.Encryptor.TransformFinalBlock(src, 0, src.Length);
    string ret = "";
    for (int i = 0; i < result.Length; i++)
    {
        ret += Convert.ToString(result[i], 16).PadLeft(2, '0');
    }
    return ret;
}