下面是一個錯誤的實現!
/// <summary>
/// 返回32位md5十六進制加密
/// </summary>
/// <param name="strValue">待加密的字符串</param>
/// <returns></returns>
public string GetHexMd5String(string strValue)
{
string strReturn = "";
byte[] data = Encoding.Unicode.GetBytes(strValue);
MD5 md5 = MD5CryptoServiceProvider.Create();
md5.ComputeHash(data);
//下面從byte到字符串轉換有問題!
for (int i=0; i<md5.Hash.Length; i++)
{
string strHex = md5.Hash[i].ToString("X2").ToLower();
//if(strHex.Length==1)
// strHex = "0"+strHex;
strReturn += strHex;
}
return strReturn;
}
/// 返回32位md5十六進制加密
/// </summary>
/// <param name="strValue">待加密的字符串</param>
/// <returns></returns>
public string GetHexMd5String(string strValue)
{
string strReturn = "";
byte[] data = Encoding.Unicode.GetBytes(strValue);
MD5 md5 = MD5CryptoServiceProvider.Create();
md5.ComputeHash(data);
//下面從byte到字符串轉換有問題!
for (int i=0; i<md5.Hash.Length; i++)
{
string strHex = md5.Hash[i].ToString("X2").ToLower();
//if(strHex.Length==1)
// strHex = "0"+strHex;
strReturn += strHex;
}
return strReturn;
}
結算加密出來的結果,寫java,php,asp等標準算法不同!
其實在.net 有一個最簡單實現MD5的方法
/// <summary>
/// MD5加密
/// </summary>
/// <param name="toCryString">被加密字符串</param>
/// <returns>加密後的字符串</returns>
public static string MD5(string toCryString)
{
return FormsAuthentication.HashPasswordForStoringInConfigFile(toCryString, "MD5");
}
/// MD5加密
/// </summary>
/// <param name="toCryString">被加密字符串</param>
/// <returns>加密後的字符串</returns>
public static string MD5(string toCryString)
{
return FormsAuthentication.HashPasswordForStoringInConfigFile(toCryString, "MD5");
}
那麼,從byte到字符串的標準轉法怎麼轉呢,我看了,Quickstart用的是
BitConverter.ToString
這樣標準md5寫法要寫成!
public static string MD5(string toCryString)
{
MD5CryptoServiceProvider hashmd5;
hashmd5 = new MD5CryptoServiceProvider();
return BitConverter.ToString(hashmd5.ComputeHash(Encoding.Default.GetBytes(toCryString))).Replace("-","").ToLower();//asp是小寫,把所有字符變小寫
}
{
MD5CryptoServiceProvider hashmd5;
hashmd5 = new MD5CryptoServiceProvider();
return BitConverter.ToString(hashmd5.ComputeHash(Encoding.Default.GetBytes(toCryString))).Replace("-","").ToLower();//asp是小寫,把所有字符變小寫
}
結果加密出來的內容,和標準的一樣了!