Martin Michelsen
84 lines
2.0 KiB
C++
84 lines
2.0 KiB
C++
#pragma once
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#include <inttypes.h>
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#include <stddef.h>
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#include <string>
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#include <vector>
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#define PC_STREAM_LENGTH 56
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#define GC_STREAM_LENGTH 521
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#define BB_STREAM_LENGTH 1042
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class PSOEncryption {
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public:
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virtual ~PSOEncryption() = default;
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virtual void encrypt(void* data, size_t size, bool advance = true) = 0;
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virtual void decrypt(void* data, size_t size, bool advance = true);
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inline void encrypt(std::string& data, bool advance = true) {
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this->encrypt(data.data(), data.size(), advance);
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}
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inline void decrypt(std::string& data, bool advance = true) {
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this->decrypt(data.data(), data.size(), advance);
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}
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virtual void skip(size_t size) = 0;
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protected:
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PSOEncryption() = default;
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};
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class PSOPCEncryption : public PSOEncryption {
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public:
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explicit PSOPCEncryption(uint32_t seed);
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virtual void encrypt(void* data, size_t size, bool advance = true);
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virtual void skip(size_t size);
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protected:
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void update_stream();
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uint32_t next(bool advance = true);
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uint32_t stream[PC_STREAM_LENGTH + 1];
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uint8_t offset;
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};
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class PSOGCEncryption : public PSOEncryption {
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public:
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explicit PSOGCEncryption(uint32_t key);
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virtual void encrypt(void* data, size_t size, bool advance = true);
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virtual void skip(size_t size);
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protected:
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void update_stream();
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uint32_t next(bool advance = true);
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uint32_t stream[GC_STREAM_LENGTH];
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uint16_t offset;
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};
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class PSOBBEncryption : public PSOEncryption {
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public:
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struct KeyFile {
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uint32_t initial_keys[18];
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uint32_t private_keys[1024];
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} __attribute__((packed));
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PSOBBEncryption(const KeyFile& key, const void* seed, size_t seed_size);
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virtual void encrypt(void* data, size_t size, bool advance = true);
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virtual void decrypt(void* data, size_t size, bool advance = true);
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virtual void skip(size_t size);
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protected:
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static std::vector<uint32_t> generate_stream(
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const KeyFile& key, const void* seed, size_t seed_size);
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const std::vector<uint32_t> stream;
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};
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