C# 3DES加密详解

package org.zwork.market.mina.msg;import java.security.spec.KeySpec;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.DESedeKeySpec;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.zwork.market.MktContants;public class ThreeEncryptDecrypt {  private static final Logger LOGGER = LoggerFactory.getLogger(ThreeEncryptDecrypt.class);  // 定义 加密算法,可用 DES,DESede,Blowfish  public static final String Algorithm = "DESede";  public static String DES = "DES/ECB/NoPadding";  public static String TriDes = "DESede/ECB/NoPadding";  // des加密  public static byte[] des_crypt(byte key[], byte data[]) {    try {      KeySpec ks = new DESKeySpec(key);      SecretKeyFactory kf = SecretKeyFactory.getInstance("DES");      SecretKey ky = kf.generateSecret(ks);      Cipher c = Cipher.getInstance(DES);      c.init(Cipher.ENCRYPT_MODE, ky);      return c.doFinal(data);    } catch (Exception e) {      LOGGER.error("des_crypt error:", e);      return null;    }  }  // des解密  public static byte[] des_decrypt(byte key[], byte data[]) {    try {      KeySpec ks = new DESKeySpec(key);      SecretKeyFactory kf = SecretKeyFactory.getInstance("DES");      SecretKey ky = kf.generateSecret(ks);      Cipher c = Cipher.getInstance(DES);      c.init(Cipher.DECRYPT_MODE, ky);      return c.doFinal(data);    } catch (Exception e) {      LOGGER.error("des_decrypt error:", e);      return null;    }  }  // 3DES加密  public static byte[] trides_crypt(byte key[], byte data[]) {    try {      byte[] k = new byte[24];      int len = data.length;      if (data.length % 8 != 0) {        len = data.length - data.length % 8 + 8;      }      byte[] needData = null;      if (len != 0)        needData = new byte[len];      for (int i = 0; i < len; i++) {        needData[i] = 0x00;      }      System.arraycopy(data, 0, needData, 0, data.length);      if (key.length == 16) {        System.arraycopy(key, 0, k, 0, key.length);        System.arraycopy(key, 0, k, 16, 8);      } else {        System.arraycopy(key, 0, k, 0, 24);      }      KeySpec ks = new DESedeKeySpec(k);      SecretKeyFactory kf = SecretKeyFactory.getInstance("DESede");      SecretKey ky = kf.generateSecret(ks);      Cipher c = Cipher.getInstance(TriDes);      c.init(Cipher.ENCRYPT_MODE, ky);      return c.doFinal(needData);    } catch (Exception e) {      LOGGER.error("trides_crypt error:", e);      return null;    }  }  // 3DES解密  public static byte[] trides_decrypt(byte key[], byte data[]) {    try {      byte[] k = new byte[24];      int len = data.length;      if (data.length % 8 != 0) {        len = data.length - data.length % 8 + 8;      }      byte[] needData = null;      if (len != 0)        needData = new byte[len];      for (int i = 0; i < len; i++) {        needData[i] = 0x00;      }      System.arraycopy(data, 0, needData, 0, data.length);      if (key.length == 16) {        System.arraycopy(key, 0, k, 0, key.length);        System.arraycopy(key, 0, k, 16, 8);      } else {        System.arraycopy(key, 0, k, 0, 24);      }      KeySpec ks = new DESedeKeySpec(k);      SecretKeyFactory kf = SecretKeyFactory.getInstance("DESede");      SecretKey ky = kf.generateSecret(ks);      Cipher c = Cipher.getInstance(TriDes);      c.init(Cipher.DECRYPT_MODE, ky);      return c.doFinal(needData);    } catch (Exception e) {      LOGGER.error("trides_decrypt error:", e);      return null;    }  }  public static String getPass(String source) {    byte[] data= hexToBytes(source);    byte[] key ="111111111111111111111111111a1.1.".getBytes();    String result = byte2hex(trides_decrypt(key, data)).toUpperCase();    return result.substring(2, 8);  }  public static String byte2hex(byte[] data) {    StringBuffer sb = new StringBuffer();    for (int i = 0; i < data.length; i++) {      String temp = Integer.toHexString(((int) data[i]) & 0xFF);      for (int t = temp.length(); t < 2; t++) {        sb.append("0");      }      sb.append(temp);    }    return sb.toString();  }  public static byte[] hexToBytes(String str) {    if (str == null) {      return null;    } else if (str.length() < 2) {      return null;    } else {      int len = str.length() / 2;      byte[] buffer = new byte[len];      for (int i = 0; i < len; i++) {        buffer[i] = (byte) Integer.parseInt(str.substring(i * 2, i * 2 + 2), 16);      }      return buffer;    }  }}

public class DESHelper{  /// <summary>  /// 将密码转成直接数组  /// </summary>  /// <param name="str"></param>  /// <returns></returns>  public static byte[] HexToBytes(String str)  {    if (str == null)    {      return null;    }    else if (str.Length < 2)    {      return null;    }    else    {      int len = str.Length / 2;      byte[] buffer = new byte[len];      for (int i = 0; i < len; i++)      {        var temp = str.Substring(i * 2, 2);        buffer[i] = (byte)Convert.ToInt32(temp, 16);      }      return buffer;    }  }  /// <summary>  /// 3DES加密  /// </summary>  /// <param name="key"></param>  /// <param name="data"></param>  /// <returns></returns>  public static byte[] GetDes3EncryptedText(byte[] key, byte[] data)  {    byte[] k = new byte[24];    int len = data.Length;    if (data.Length % 8 != 0)    {      len = data.Length - data.Length % 8 + 8;    }    byte[] needData = null;    if (len != 0)      needData = new byte[len];    for (int i = 0; i < len; i++)    {      needData[i] = 0x00;    }    Buffer.BlockCopy(data, 0, needData, 0, data.Length);    if (key.Length == 16)    {      Buffer.BlockCopy(key, 0, k, 0, key.Length);      Buffer.BlockCopy(key, 0, k, 16, 8);    }    else    {      Buffer.BlockCopy(key, 0, k, 0, 24);    }    var des3 = new TripleDESCryptoServiceProvider();    des3.Key = k;    des3.Mode = CipherMode.ECB;    des3.Padding = PaddingMode.Zeros;    using (MemoryStream ms = new MemoryStream())    using (CryptoStream cs = new CryptoStream(ms, des3.CreateEncryptor(), CryptoStreamMode.Write))    {      cs.Write(data, 0, data.Length);      cs.FlushFinalBlock();      return ms.ToArray();    }  }  /// <summary>  /// 将加密结果转成字符串  /// </summary>  /// <param name="data"></param>  /// <returns></returns>  public static String GetByte2Hex(byte[] data)  {    StringBuilder sb = new StringBuilder();    for (int i = 0; i < data.Length; i++)    {      String temp = string.Format("{0:X}", ((int)data[i]) & 0xFF);      for (int t = temp.Length; t < 2; t++)      {        sb.Append("0");      }      sb.Append(temp);    }    return sb.ToString();  }}