public partial class HashEncrypt
{
/// <summary>
/// </summary>
/// <param name="strSource">待加密字串</param>
/// <returns>加密后的字串</returns>
public static string MD5Encrypt(string strSource)
{
return MD5Encrypt(strSource, 16);
}
/// <summary>
/// </summary>
/// <param name="strSource">待加密字串</param>
/// <param name="length">16或32值之一,其它则采用.net默认MD5加密算法</param>
/// <returns>加密后的字串</returns>
public static string MD5Encrypt(string strSource, int length)
{
byte[] bytes = Encoding.ASCII.GetBytes(strSource);
byte[] hashValue = ((System.Security.Cryptography.HashAlgorithm)System.Security.Cryptography.CryptoConfig.CreateFromName("MD5")).ComputeHash(bytes);
StringBuilder sb = new StringBuilder();
switch (length)
{
case 16:
for (int i = 4; i < 12; i++)
sb.Append(hashValue[i].ToString("x2"));
break;
case 32:
for (int i = 0; i < 16; i++)
{
sb.Append(hashValue[i].ToString("x2"));
}
break;
default:
for (int i = 0; i < hashValue.Length; i++)
{
sb.Append(hashValue[i].ToString("x2"));
}
break;
}
return sb.ToString();
}
/// <summary>
/// md5 encrypt
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string MSMD5(String str)
{
MD5 md5 = new MD5CryptoServiceProvider();
byte[] data = System.Text.Encoding.Default.GetBytes(str);
byte[] result = md5.ComputeHash(data);
String ret = "";
for (int i = 0; i < result.Length; i++)
ret += result[i].ToString("x").PadLeft(2, '0');
return ret;
}
/// <summary>
/// get md5 hash value
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
static string MSGetMd5Hash(string input)
{
// Create a new instance of the MD5CryptoServiceProvider object.
MD5 md5Hasher = System.Security.Cryptography.MD5.Create();
// Convert the input string to a byte array and compute the hash.
byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString("x2"));
}
// Return the hexadecimal string.
return sBuilder.ToString();
}
/// <summary>
/// Verify a hash against a string.
/// </summary>
/// <param name="input"></param>
/// <param name="hash"></param>
/// <returns></returns>
static bool VerifyMd5Hash(string input, string hash)
{
// Hash the input.
string hashOfInput = MSGetMd5Hash(input);
// Create a StringComparer an comare the hashes.
StringComparer comparer = StringComparer.OrdinalIgnoreCase;
if (0 == comparer.Compare(hashOfInput, hash))
{
return true;
}
else
{
return false;
}
}
}
