Martin Michelsen
62 lines
1.2 KiB
C++
62 lines
1.2 KiB
C++
#include <inttypes.h>
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#include <stddef.h>
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#define PC_STREAM_LENGTH 57
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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) = 0;
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virtual void decrypt(void* data, size_t size);
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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);
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private:
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void update_stream();
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uint32_t next();
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uint32_t stream[PC_STREAM_LENGTH];
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uint16_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);
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private:
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void update_stream();
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uint32_t next();
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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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explicit PSOBBEncryption(const void* key);
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virtual void encrypt(void* data, size_t size);
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virtual void decrypt(void* data, size_t size);
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private:
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void update_stream();
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uint32_t stream[BB_STREAM_LENGTH];
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uint16_t offset;
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};
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