Simulating MySql's PASSWORD() encryption using .NET in Windows 8 - mysql

Question

PASSWORD() according to MySQL documentation is a double SHA1 algorithm.
In Win32 I was using this method:
public string GenerateMySQLHash(string key)
{
byte[] keyArray = Encoding.UTF8.GetBytes(key);
SHA1Managed enc = new SHA1Managed();
byte[] encodedKey = enc.ComputeHash(enc.ComputeHash(keyArray));
StringBuilder myBuilder = new StringBuilder(encodedKey.Length);
foreach (byte b in encodedKey)
myBuilder.Append(b.ToString("X2"));
return "*" + myBuilder.ToString();
}
SHA1Managed object is not available in the Metro .net framework because the security stuff is now in Windows.Security.Cryptography and not in System.Security.Cryptography.
In the documentation, I see this example to obtain the SHA1 from a string:
public String HashMsg(String strMsg)
{
// Convert the message string to binary data.
IBuffer buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(strMsg, BinaryStringEncoding.Utf8);
// Create a HashAlgorithmProvider object.
HashAlgorithmProvider objAlgProv = HashAlgorithmProvider.OpenAlgorithm(HashAlgorithmNames.Sha1);
// Hash the message.
IBuffer buffHash = objAlgProv.HashData(buffUtf8Msg);
// Verify that the hash length equals the length specified for the algorithm.
if (buffHash.Length != objAlgProv.HashLength)
{
throw new Exception("There was an error creating the hash");
}
// Convert the hash to a string (for display).
return CryptographicBuffer.EncodeToBase64String(buffHash);
}
But I need a double SHA1 algorithm. Any way to do this easy as in win32?

Answer 1

I finally found the solution :), I hope it help you:
/// <summary>
/// Reverse a string
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
public static string ReverseString(string s)
{
char[] arr = s.ToCharArray();
Array.Reverse(arr);
return new string(arr);
}
/// <summary>
/// MySQL PASSWORD encryption
/// </summary>
/// <param name="strMsg"></param>
/// <returns></returns>
public String HashMsg(String strMsg)
{
// Convert the message string to binary data.
IBuffer buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(strMsg, BinaryStringEncoding.Utf8);
// Create a HashAlgorithmProvider object.
HashAlgorithmProvider objAlgProv = HashAlgorithmProvider.OpenAlgorithm(HashAlgorithmNames.Sha1);
// Hash the message.
IBuffer buffHash = objAlgProv.HashData(objAlgProv.HashData(buffUtf8Msg));
// Verify that the hash length equals the length specified for the algorithm.
if (buffHash.Length != objAlgProv.HashLength)
{
throw new Exception("There was an error creating the hash");
}
byte[] arrByteNew;
CryptographicBuffer.CopyToByteArray(buffHash, out arrByteNew);
StringBuilder myBuilder = new StringBuilder(arrByteNew.Length);
foreach (var b in arrByteNew)
myBuilder.Append(b.ToString("X2"));
// Concat with the STRING REVERSED
String stringReversed = "*" + myBuilder.ToString() + ReverseString(strMsg);
buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(s3, BinaryStringEncoding.Utf8);
buffHash = objAlgProv.HashData(objAlgProv.HashData(buffUtf8Msg));
if (buffHash.Length != objAlgProv.HashLength)
{
throw new Exception("There was an error creating the hash");
}
CryptographicBuffer.CopyToByteArray(buffHash, out arrByteNew);
myBuilder = new StringBuilder(arrByteNew.Length);
foreach (var b in arrByteNew)
{
myBuilder.Append(b.ToString("X2"));
}
stringReversed = "*" + myBuilder.ToString();
return stringReversed;
}