public void ProcessRequest(HttpContext context)
{
byte[] requestData = new byte[(int)context.Request.InputStream.Length];
context.Request.InputStream.ReadBlock(requestData, 0, (int)context.Request.InputStream.Length);
// this is a mysterious token of unknown purpose. It seems to vary
// with the type of request being done.
// On GTS requests, it's 83 characters long and begins with NDS.
// In Random Matchup, it looks more like a base64 string, is 88
// chars long and encodes 64 bytes of random looking data.
// It is null terminated (variable length), followed immediately
// by the rest of the message.
int tokenLength = Array.IndexOf<byte>(requestData, 0x00);
String token = StringHelper.BytesToString(requestData, 0, tokenLength, Encoding.UTF8);
int offset = tokenLength + 1;
RequestType type = (RequestType)BitConverter.ToInt16(requestData, offset);
offset += 2;
PokemonValidationResult[] results;
switch (type)
{
case RequestType.RandomMatchup:
case RequestType.GTS:
{
int pkmCount = (requestData.Length - offset) / 220;
results = new PokemonValidationResult[pkmCount];
for (int x = 0; x < results.Length; x++)
{
byte[] data = new byte[220];
Array.Copy(requestData, offset + x, data, 0, 220);
Pokemon5 pkm = new Pokemon5(data);
// todo: actual validation goes here
results[x] = PokemonValidationResult.Valid;
}
} break;
/*
case RequestType.BattleSubway:
{
// todo: Need more info on this structure
} break;
*/
// todo: there also appears to be a Battle Video request?
default:
{
// Don't understand this request. Give it a response containing
// all 00s so stuff depending on it won't break.
// The game accepts a hash of all 00s and doesn't care what's contained
// in the response beyond its expected length so this will work.
// fixme: Once we start generating real signatures, they will prevent
// this from returning the necessary number of 00s in all cases.
results = new PokemonValidationResult[]{
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid};
} break;
}
PartyValidationResult result = PartyValidationResult.Valid;
foreach (PokemonValidationResult pkr in results)
{
if (pkr != PokemonValidationResult.Valid) result = PartyValidationResult.Invalid;
}
context.Response.ContentType = "text/plain";
context.Response.OutputStream.WriteByte((byte)result); // success
foreach (PokemonValidationResult pkr in results)
{
context.Response.OutputStream.Write(BitConverter.GetBytes((int)pkr), 0, 4);
}
// placeholder for signature.
// Should be 128 bytes of an unknown hashing/signing algorithm
context.Response.OutputStream.Write(new byte[128], 0, 128);
}
public void ProcessRequest(HttpContext context)
{
byte[] requestData = new byte[(int)context.Request.InputStream.Length];
context.Request.InputStream.ReadBlock(requestData, 0, (int)context.Request.InputStream.Length);
// this is a mysterious token of unknown purpose. It seems to vary
// with the type of request being done.
// On GTS requests, it's 83 characters long and begins with NDS.
// In Random Matchup, it looks more like a base64 string, is 88
// chars long and encodes 64 bytes of random looking data.
// It is null terminated (variable length), followed immediately
// by the rest of the message.
int tokenLength = Array.IndexOf <byte>(requestData, 0x00);
String token = StringHelper.BytesToString(requestData, 0, tokenLength, Encoding.UTF8);
int offset = tokenLength + 1;
RequestType type = (RequestType)BitConverter.ToInt16(requestData, offset);
offset += 2;
PokemonValidationResult[] results;
switch (type)
{
case RequestType.RandomMatchup:
case RequestType.GTS:
{
int pkmCount = (requestData.Length - offset) / 220;
results = new PokemonValidationResult[pkmCount];
for (int x = 0; x < results.Length; x++)
{
byte[] data = new byte[220];
Array.Copy(requestData, offset + x, data, 0, 220);
Pokemon5 pkm = new Pokemon5(data);
// todo: actual validation goes here
results[x] = PokemonValidationResult.Valid;
}
} break;
/*
* case RequestType.BattleSubway:
* {
* // todo: Need more info on this structure
* } break;
*/
// todo: there also appears to be a Battle Video request?
default:
{
// Don't understand this request. Give it a response containing
// all 00s so stuff depending on it won't break.
// The game accepts a hash of all 00s and doesn't care what's contained
// in the response beyond its expected length so this will work.
// fixme: Once we start generating real signatures, they will prevent
// this from returning the necessary number of 00s in all cases.
results = new PokemonValidationResult[] {
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid,
PokemonValidationResult.Valid
};
} break;
}
PartyValidationResult result = PartyValidationResult.Valid;
foreach (PokemonValidationResult pkr in results)
{
if (pkr != PokemonValidationResult.Valid)
{
result = PartyValidationResult.Invalid;
}
}
context.Response.ContentType = "text/plain";
context.Response.OutputStream.WriteByte((byte)result); // success
foreach (PokemonValidationResult pkr in results)
{
context.Response.OutputStream.Write(BitConverter.GetBytes((int)pkr), 0, 4);
}
// placeholder for signature.
// Should be 128 bytes of an unknown hashing/signing algorithm
context.Response.OutputStream.Write(new byte[128], 0, 128);
}