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 GenerateTable42()
{
int i;
_hasht42 = new byte[ 256 * 32 ];
for( i = 0; i < 256; i++ )
{
BrokenMD5 md5 = new BrokenMD5( 0 );
if( ( i & 0x80 ) != 0 )
TransformString( md5, "Accept-Language", false );
else
TransformString( md5, "user-agent", false );
if( ( i & 0x40 ) != 0 )
TransformString( md5, "max-age", false );
else
TransformString( md5, "Authorization", false );
if( ( i & 0x20 ) != 0 )
TransformString( md5, "Client-DAAP-Version", false );
else
TransformString( md5, "Accept-Encoding", false );
if( ( i & 0x10 ) != 0 )
TransformString( md5, "daap.protocolversion", false );
else
TransformString( md5, "daap.songartist", false );
if( ( i & 0x08 ) != 0 )
TransformString( md5, "daap.songcomposer", false );
else
TransformString( md5, "daap.songdatemodified", false );
if( ( i & 0x04 ) != 0 )
TransformString( md5, "daap.songdiscnumber", false );
else
TransformString( md5, "daap.songdisabled", false );
if( ( i & 0x02 ) != 0 )
TransformString( md5, "playlist-item-spec", false );
else
TransformString( md5, "revision-number", false );
if( ( i & 0x01 ) != 0 )
TransformString( md5, "session-id", true );
else
TransformString( md5, "content-codes", true );
HashToString( md5.Hash, _hasht42, i * 32 );
}
}
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 );
}
private static void GenerateTable45()
{
int i;
_hasht45 = new byte[ 256 * 32 ];
for( i = 0; i < 256; i++ )
{
BrokenMD5 md5 = new BrokenMD5( 1 );
if( ( i & 0x40 ) != 0 )
TransformString( md5, "eqwsdxcqwesdc", false );
else
TransformString( md5, "op[;lm,piojkmn", false );
if( ( i & 0x20 ) != 0 )
TransformString( md5, "876trfvb 34rtgbvc", false );
else
TransformString( md5, "=-0ol.,m3ewrdfv", false );
if( ( i & 0x10 ) != 0 )
TransformString( md5, "87654323e4rgbv ", false );
else
TransformString( md5, "1535753690868867974342659792", false );
if( ( i & 0x08 ) != 0 )
TransformString( md5, "Song Name", false );
else
TransformString( md5, "DAAP-CLIENT-ID:", false );
if( ( i & 0x04 ) != 0 )
TransformString( md5, "111222333444555", false );
else
TransformString( md5, "4089961010", false );
if( ( i & 0x02 ) != 0 )
TransformString( md5, "playlist-item-spec", false );
else
TransformString( md5, "revision-number", false );
if( ( i & 0x01 ) != 0 )
TransformString( md5, "session-id", false );
else
TransformString( md5, "content-codes", false );
if( ( i & 0x80 ) != 0 )
TransformString( md5, "IUYHGFDCXWEDFGHN", true );
else
TransformString( md5, "iuytgfdxwerfghjm", true );
HashToString( md5.Hash, _hasht45, i * 32 );
}
}
