/// <summary>
/// take any string and encrypt it by encryption key,
/// using the requested encription type
/// then return the encrypted data
/// </summary>
/// <param name="message"></param>
/// <param name="key"></param>
/// <param name="encType"></param>
/// <returns></returns>
public static string GetHashData(string message, string key, encriptionType encType)
{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
byte[] keyByte = encoding.GetBytes(key);
HMACMD5 hmacmd5 = new HMACMD5(keyByte);
HMACSHA1 hmacsha1 = new HMACSHA1(keyByte);
byte[] messageBytes = encoding.GetBytes(message);
byte[] hashmessage;
switch (encType)
{
case encriptionType.MD5:
hashmessage = hmacmd5.ComputeHash(messageBytes);
break;
case encriptionType.SHA1:
hashmessage = hmacsha1.ComputeHash(messageBytes);
break;
default:
hashmessage = hmacmd5.ComputeHash(messageBytes);
break;
}
return(ByteToString(hashmessage));
}
/// <summary>
/// encrypt input text by encryption key with requested encription type
/// and compare it with the stored encrypted text
/// </summary>
/// <param name="inputData"></param>
/// <param name="storedHashData"></param>
/// <param name="key"></param>
/// <param name="encType"></param>
/// <returns></returns>
public static bool ValidateHashData(string inputData, string storedHashData, string key, encriptionType encType)
{
//hash input text and save it string variable
string getHashInputData = GetHashData(inputData, key, encType);
if (string.Compare(getHashInputData, storedHashData) == 0)
{
return(true);
}
else
{
return(false);
}
}
