Martin Michelsen
131 lines
3.5 KiB
C++
131 lines
3.5 KiB
C++
#pragma once
|
|
|
|
#include <inttypes.h>
|
|
#include <stddef.h>
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
|
|
|
|
#define PC_STREAM_LENGTH 56
|
|
#define GC_STREAM_LENGTH 521
|
|
#define BB_STREAM_LENGTH 1042
|
|
|
|
class PSOEncryption {
|
|
public:
|
|
virtual ~PSOEncryption() = default;
|
|
|
|
virtual void encrypt(void* data, size_t size, bool advance = true) = 0;
|
|
virtual void decrypt(void* data, size_t size, bool advance = true);
|
|
|
|
inline void encrypt(std::string& data, bool advance = true) {
|
|
this->encrypt(data.data(), data.size(), advance);
|
|
}
|
|
inline void decrypt(std::string& data, bool advance = true) {
|
|
this->decrypt(data.data(), data.size(), advance);
|
|
}
|
|
|
|
virtual void skip(size_t size) = 0;
|
|
|
|
protected:
|
|
PSOEncryption() = default;
|
|
};
|
|
|
|
class PSOPCEncryption : public PSOEncryption {
|
|
public:
|
|
explicit PSOPCEncryption(uint32_t seed);
|
|
|
|
virtual void encrypt(void* data, size_t size, bool advance = true);
|
|
virtual void skip(size_t size);
|
|
|
|
protected:
|
|
void update_stream();
|
|
uint32_t next(bool advance = true);
|
|
|
|
uint32_t stream[PC_STREAM_LENGTH + 1];
|
|
uint8_t offset;
|
|
};
|
|
|
|
class PSOGCEncryption : public PSOEncryption {
|
|
public:
|
|
explicit PSOGCEncryption(uint32_t key);
|
|
|
|
virtual void encrypt(void* data, size_t size, bool advance = true);
|
|
virtual void skip(size_t size);
|
|
|
|
protected:
|
|
void update_stream();
|
|
uint32_t next(bool advance = true);
|
|
|
|
uint32_t stream[GC_STREAM_LENGTH];
|
|
uint16_t offset;
|
|
};
|
|
|
|
class PSOBBEncryption : public PSOEncryption {
|
|
public:
|
|
struct KeyFile {
|
|
// initial_keys are actually a stream of uint32_ts, but we treat them as
|
|
// bytes for code simplicity
|
|
uint8_t initial_keys[0x12 * 4];
|
|
uint32_t private_keys[0x400];
|
|
uint8_t is_modcrypt;
|
|
} __attribute__((packed));
|
|
|
|
PSOBBEncryption(const KeyFile& key, const void* seed, size_t seed_size);
|
|
|
|
virtual void encrypt(void* data, size_t size, bool advance = true);
|
|
virtual void decrypt(void* data, size_t size, bool advance = true);
|
|
virtual void skip(size_t size);
|
|
|
|
protected:
|
|
PSOBBEncryption();
|
|
|
|
static std::vector<uint32_t> generate_stream(
|
|
const KeyFile& key, const void* seed, size_t seed_size);
|
|
|
|
std::vector<uint32_t> stream;
|
|
};
|
|
|
|
// The following classes provide support for multiple PSOBB private keys, and
|
|
// the ability to automatically detect which key the client is using based on
|
|
// the first 8 bytes they send.
|
|
|
|
class PSOBBMultiKeyClientEncryption : public PSOBBEncryption {
|
|
public:
|
|
PSOBBMultiKeyClientEncryption(
|
|
const std::vector<std::shared_ptr<const KeyFile>>& possible_keys,
|
|
const std::string& expected_first_data,
|
|
const void* seed,
|
|
size_t seed_size);
|
|
|
|
virtual void encrypt(void* data, size_t size, bool advance = true);
|
|
virtual void decrypt(void* data, size_t size, bool advance = true);
|
|
|
|
friend class PSOBBMultiKeyServerEncryption;
|
|
|
|
protected:
|
|
std::vector<std::shared_ptr<const KeyFile>> possible_keys;
|
|
std::shared_ptr<const KeyFile> active_key;
|
|
std::string expected_first_data;
|
|
std::string seed;
|
|
};
|
|
|
|
class PSOBBMultiKeyServerEncryption : public PSOBBEncryption {
|
|
public:
|
|
PSOBBMultiKeyServerEncryption(
|
|
std::shared_ptr<const PSOBBMultiKeyClientEncryption> client_crypt,
|
|
const void* seed,
|
|
size_t seed_size);
|
|
|
|
virtual void encrypt(void* data, size_t size, bool advance = true);
|
|
virtual void decrypt(void* data, size_t size, bool advance = true);
|
|
|
|
protected:
|
|
void ensure_stream_ready();
|
|
|
|
std::shared_ptr<const PSOBBMultiKeyClientEncryption> client_crypt;
|
|
std::string seed;
|
|
};
|