Implementation of MD5CryptoServiceProvider in. net Compact Flamework

In the. net Flamework full version, encryption classes in the System. Security. Cryptography namespace are well supported. However, the corresponding classes in the namespace are not provided in the Lite version. It is really troublesome to use encryption algorithms when using. net to write a Pocket PC program. There are two methods to solve this problem. OpenNetCF (www.openetcf.org) provides the System. security. simulation of various classes in the Cryptography namespace, but it lacks flexibility: for example, during symmetric encryption, users cannot set attributes such as Padding and CipherMode. In addition, its provision method is inconsistent with the class interface in the full version of. net, which causes confusion to users. Another method is to manually encapsulate the cryptoAPI.
Recently, the MD5CryptoServiceProvider has been implemented out of work requirements. The interfaces of this class are exactly the same as those in the full version.
Implementation of the "System. Security. Cryptography. MD5CryptoServiceProvider" class.

Public sealed class MD5CryptoServiceProvider: MD5
{
Public MD5CryptoServiceProvider ()
{
Initialize ();
M_Disposed = false;
}
Public override void Initialize ()
{
If (m_Disposed)
Throw new ObjectDisposedException (this. GetType (). FullName );
If (m_Hash! = IntPtr. Zero)
{
Crypto. CryptDestroyHash (m_Hash );
}
M_Prov = Crypto. AcquireContext (ProvType. RSA_FULL );
Bool retVal = Crypto. CryptCreateHash (m_Prov, (uint) CalgHash. MD5, IntPtr. Zero, 0, out m_Hash );

}
Protected override void HashCore (byte [] array, int ibStart, int cbSize)
{
If (m_Disposed)