php和.net 的加密解密

PHP版：

$key = 335ff';

/*

* 加密方法

* @param string $input，待加密的字符串

* @param string $key，加密的密码（只能为8位长）

* @return string,加密之后的文本

* */

public static function encryptForDotNet($input, $key) {

$iv = $key;

$addnum = 8 - ( strlen($input) % 8 );

for ($i = 0; $i < $addnum; $i++) {

$input .= chr($addnum);

}

$output = mcrypt_encrypt(MCRYPT_DES, $key, $input, MCRYPT_MODE_CBC, $iv);

return base64_encode($output);

}

/*

* 解密方法

* @param string $input，待解密的字符串

* @param string $key，解密的密码（只能为8位长）

* @return string,解密之后的文本

* */

public static function decryptForDotNet($input, $key) {

$iv = $key;

$output = base64_decode($input);

$output = mcrypt_decrypt(MCRYPT_DES, $key, $output, MCRYPT_MODE_CBC, $iv);

for ($i = 0; $i <= 8; $i++) {

$output = str_replace(chr($i), "", $output);

}

return $output;

}

C#版：

password = 'isso_key';

/// <summary>

/// 加密方法

/// </summary>

/// <param name="input">待加密的字符串</param>

/// <param name="password">加密的密码（只能为8位长）</param>

/// <param name="encoding">编码方式</param>

/// <returns>加密之后的文本</returns>

public static string Encrypt(string input, string password, Encoding encoding = null)

{

encoding = encoding ?? Encoding.Default;

//注意iv的长度，必须和key中的密码长度相同

var iv = encoding.GetBytes(password);

var key = encoding.GetBytes(password);

var datas = encoding.GetBytes(input);

var desCryptoServiceProvider = new DESCryptoServiceProvider();

using (var memoryStream = new MemoryStream())

{

using (

var cryptoStream = new CryptoStream(memoryStream, desCryptoServiceProvider.CreateEncryptor(iv, key),

CryptoStreamMode.Write))

{

cryptoStream.Write(datas, 0, datas.Length);

cryptoStream.FlushFinalBlock();

return Convert.ToBase64String(memoryStream.ToArray());

}

}

}

/// <summary>

/// 解密方法

/// </summary>

/// <param name="input">待解密的字符串</param>

/// <param name="password">加密时用的密码（只能为8位长）</param>

/// <param name="encoding">编码方式</param>

/// <returns>解密之后的文本</returns>

public static string Decrypt(string input, string password, Encoding encoding = null)

{

encoding = encoding ?? Encoding.Default;

var iv = encoding.GetBytes(password);

var key = encoding.GetBytes(password);

var datas = Convert.FromBase64String(input);

var desCryptoServiceProvider = new DESCryptoServiceProvider();

using (var memoryStream = new MemoryStream())

{

using (

var cryptoStream = new CryptoStream(memoryStream, desCryptoServiceProvider.CreateDecryptor(iv, key),

CryptoStreamMode.Write))

{

cryptoStream.Write(datas, 0, datas.Length);

cryptoStream.FlushFinalBlock();

return encoding.GetString(memoryStream.ToArray());

}

}

}