bool RTMFP::Decode(AESEngine& aesDecrypt,PacketReader& packet) {
// Decrypt
aesDecrypt.process(packet.current(),packet.current(),packet.available());
// Check the first 2 CRC bytes
packet.reset(4);
UInt16 sum = packet.read16();
return (sum == CheckSum(packet));
}
void RTMFP::Encode(AESEngine& aesEncrypt,PacketWriter& packet) {
if(aesEncrypt.type != AESEngine::EMPTY) {
// paddingBytesLength=(0xffffffff-plainRequestLength+5)&0x0F
int paddingBytesLength = (0xFFFFFFFF-packet.length()+5)&0x0F;
// Padd the plain request with paddingBytesLength of value 0xff at the end
packet.reset(packet.length());
string end(paddingBytesLength,(UInt8)0xFF);
packet.writeRaw(end);
}
WriteCRC(packet);
// Encrypt the resulted request
aesEncrypt.process(packet.begin()+4,packet.begin()+4,packet.length()-4);
}
void RTMFP::Encode(AESEngine& aesEncrypt,PacketWriter packet) {
// paddingBytesLength=(0xffffffff-plainRequestLength+5)&0x0F
int paddingBytesLength = (0xFFFFFFFF-packet.length()+5)&0x0F;
// Padd the plain request with paddingBytesLength of value 0xff at the end
packet.reset(packet.length());
string end(paddingBytesLength,(UInt8)0xFF);
packet.writeRaw(end);
// Compute the CRC and add it at the beginning of the request
PacketReader reader(packet);
reader.next(6);
UInt16 sum = CheckSum(reader);
packet.reset(4);packet << sum;
// Encrypt the resulted request
reader.reset(4);
aesEncrypt.process(reader.current(),reader.current(),reader.available());
}
bool RTMFP::Decode(AESEngine& aesDecrypt,PacketReader& packet) {
// Decrypt
aesDecrypt.process(packet.current(),packet.current(),packet.available());
return ReadCRC(packet);
}
