PHP實現和c#壹致的DES加密解密，可以從網上搜到壹大堆，但是測試後發現都沒法用。以下正確代碼是我經過苦苦才找到的。希望大家在系統整合時能用的上。
註意：key的長度為8位以內。
[csharp]?view?plain?copy?print?//C#?版DES?加解密算法?
using?System;?
using?System.Data;?
using?System.Configuration;?
using?System.Web;?
using?System.Web.Security;?
using?System.Web.UI;?
using?System.Web.UI.WebControls;?
using?System.Web.UI.WebControls.WebParts;?
using?System.Web.UI.HtmlControls;?
using?System.Data.SqlClient;?
using?System.Security.Cryptography;?
using?System.IO;?
using?System.Text;?
public?class?Des{?
//加解密密鑰?
private?static?string?skey?=?"12345678";?
//初始化向量?
private?static?byte[]?DESIV?=?{?0x12,?0x34,?0x56,?0x78,?0x90,?0xAB,?0xCD,?0xEF?};
#region?DESEnCode?DES加密?
public?static?string?DESEnCode(string?pToEncrypt,?string?sKey)?
{?
pToEncrypt?=?HttpContext.Current.Server.UrlEncode(pToEncrypt);?
DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();?
byte[]?inputByteArray?=?Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);?
//建立加密對象的密鑰和偏移量?
//原文使用ASCIIEncoding.ASCII方法的GetBytes方法?
//使得輸入密碼必須輸入英文文本?
des.Key?=?ASCIIEncoding.ASCII.GetBytes(sKey);?
des.IV?=?ASCIIEncoding.ASCII.GetBytes(sKey);?
MemoryStream?ms?=?new?MemoryStream();?
CryptoStream?cs?=?new?CryptoStream(ms,?des.CreateEncryptor(),?CryptoStreamMode.Write);?
cs.Write(inputByteArray,?0,?inputByteArray.Length);?
cs.FlushFinalBlock();?
StringBuilder?ret?=?new?StringBuilder();?
foreach?(byte?b?in?ms.ToArray())?
{?
ret.AppendFormat("{0:X2}",?b);?
}?
ret.ToString();?
return?ret.ToString();?
}
#endregion
///?<summary>?
///
///?</summary>?
///?<param?name="pToDecrypt">?待解密的字符串</param>?
///?<param?name="sKey">?解密密鑰,要求為8字節,和加密密鑰相同</param>?
///?<returns>解密成功返回解密後的字符串，失敗返源串</returns>?
#region?DESDeCode?DES解密?
public?static?string?DESDeCode(string?pToDecrypt,?string?sKey)?
{?
//HttpContext.Current.Response.Write(pToDecrypt?+?"<br>"?+?sKey);?
//HttpContext.Current.Response.End();?
DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();?
byte[]?inputByteArray?=?new?byte[pToDecrypt.Length?/?2];?
for?(int?x?=?0;?x?<?pToDecrypt.Length?/?2;?x++)?
{?
int?i?=?(Convert.ToInt32(pToDecrypt.Substring(x?*?2,?2),?16));?
inputByteArray[x]?=?(byte)i;?
}?
des.Key?=?ASCIIEncoding.ASCII.GetBytes(sKey);?
des.IV?=?ASCIIEncoding.ASCII.GetBytes(sKey);?
MemoryStream?ms?=?new?MemoryStream();?
CryptoStream?cs?=?new?CryptoStream(ms,?des.CreateDecryptor(),?CryptoStreamMode.Write);?
cs.Write(inputByteArray,?0,?inputByteArray.Length);?
cs.FlushFinalBlock();?
StringBuilder?ret?=?new?StringBuilder();?
return?HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));?
}?
#endregion
}[php]?view?plain?copy?print?
<?php?
class?DES?
{?
var?$key;?
var?$iv;?//偏移量?
function?DES(?$key,?$iv=0?)?{?
//key長度8例如:1234abcd?
$this->key?=?$key;?
if(?$iv?==?0?)?{?
$this->iv?=?$key;?//默認以$key?作為?iv?
}?else?{?
$this->iv?=?$iv;?//mcrypt_create_iv?(?mcrypt_get_block_size?(MCRYPT_DES,?MCRYPT_MODE_CBC),?MCRYPT_DEV_RANDOM?);?
}?
}?
function?encrypt($str)?{?
//加密，返回大寫十六進制字符串?
$size?=?mcrypt_get_block_size?(?MCRYPT_DES,?MCRYPT_MODE_CBC?);?
$str?=?$this->pkcs5Pad?(?$str,?$size?);?
return?strtoupper(?bin2hex(?mcrypt_cbc(MCRYPT_DES,?$this->key,?$str,?MCRYPT_ENCRYPT,?$this->iv?)?)?);?
}?
function?decrypt($str)?{?
//解密?
$strBin?=?$this->hex2bin(?strtolower(?$str?)?);?
$str?=?mcrypt_cbc(?MCRYPT_DES,?$this->key,?$strBin,?MCRYPT_DECRYPT,?$this->iv?);?
$str?=?$this->pkcs5Unpad(?$str?);?
return?$str;?
}?
function?hex2bin($hexData)?{?
$binData?=?"";?
for($i?=?0;?$i?<?strlen?(?$hexData?);?$i?+=?2)?{?
$binData?.=?chr?(?hexdec?(?substr?(?$hexData,?$i,?2?)?)?);?
}?
return?$binData;?
}?
function?pkcs5Pad($text,?$blocksize)?{?
$pad?=?$blocksize?-?(strlen?(?$text?)?%?$blocksize);?
return?$text?.?str_repeat?(?chr?(?$pad?),?$pad?);?
}?
function?pkcs5Unpad($text)?{?
$pad?=?ord?(?$text?{strlen?(?$text?)?-?1}?);?
if?($pad?>?strlen?(?$text?))?
return?false;?
if?(strspn?(?$text,?chr?(?$pad?),?strlen?(?$text?)?-?$pad?)?!=?$pad)?
return?false;?
return?substr?(?$text,?0,?-?1?*?$pad?);?
}?
}?
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