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//
// Mono.Security.Cryptography.MD4CryptoServiceProvider
//
// Authors:
// Sebastien Pouliot (spouliot@motus.com)
//
// Copyright (C) 2003 Motus Technologies Inc. (http://www.motus.com)
//
using System;
using System.Security.Cryptography;
namespace Mono.Security.Cryptography {
public class MD4CryptoServiceProvider : MD4 {
private CapiHash hash;
public MD4CryptoServiceProvider ()
{
hash = null;
}
~MD4CryptoServiceProvider ()
{
Dispose (true);
}
// 2 cases:
// a. we were calculing a hash and want to abort
// b. we haven't started yet
public override void Initialize ()
{
State = 0;
if (hash == null) {
hash = new CapiHash (CryptoAPI.CALG_MD4);
}
}
protected override void Dispose (bool disposing)
{
if (hash != null) {
hash.Dispose ();
hash = null;
// there's no unmanaged resources (so disposing isn't used)
}
}
protected override void HashCore (byte[] rgb, int ibStart, int cbSize)
{
if (State == 0)
Initialize ();
if (hash == null)
throw new ObjectDisposedException ("MD4CryptoServiceProvider");
State = 1;
hash.HashCore (rgb, ibStart, cbSize);
}
protected override byte[] HashFinal ()
{
if (hash == null)
throw new ObjectDisposedException ("MD4CryptoServiceProvider");
State = 0;
byte[] result = hash.HashFinal ();
Dispose (false);
return result;
}
}
}
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