public static string GenerateHash(int version_major, string url,
int hash_select, int request_id )
{
if( _hasht42 == null )
GenerateTable42();
if( _hasht45 == null )
GenerateTable45();
byte [] hashtable = (version_major == 3) ? _hasht45 : _hasht42;
BrokenMD5 md5 = new BrokenMD5( (version_major == 3) ? 1 : 0 );
byte [] hash = new byte[ 32 ];
byte [] tmp = Encoding.ASCII.GetBytes( url );
md5.TransformBlock( tmp, 0, tmp.Length, tmp, 0 );
md5.TransformBlock( _copyright, 0, _copyright.Length, _copyright, 0 );
if( request_id > 0 && version_major == 3 )
{
md5.TransformBlock( hashtable, hash_select * 32, 32,
hashtable, hash_select * 32 );
tmp = Encoding.ASCII.GetBytes( request_id.ToString() );
md5.TransformFinalBlock( tmp, 0, tmp.Length );
}
else
{
md5.TransformFinalBlock( hashtable, hash_select * 32, 32 );
}
HashToString( md5.Hash, hash, 0 );
return Encoding.ASCII.GetString( hash );
}
private static void TransformString( BrokenMD5 md5, string str, bool final )
{
byte [] tmp = Encoding.ASCII.GetBytes( str );
if( final )
md5.TransformFinalBlock( tmp, 0, tmp.Length );
else
md5.TransformBlock( tmp, 0, tmp.Length, tmp, 0 );
}
