Move XChunk processors to ZoneCommon

src/ZoneCommon/Zone/XChunk/AbstractSalsa20Processor.h

@@ -0,0 +1,45 @@
+#pragma once
+#include <cstdint>
+#include <memory>
+#include <string>
+
+#include "Utils/ClassUtils.h"
+#include "Crypto.h"
+#include "Utils/ICapturedDataProvider.h"
+
+class AbstractSalsa20Processor : public ICapturedDataProvider
+{
+protected:
+    static constexpr int BLOCK_HASHES_COUNT = 200;
+    static constexpr int SHA1_HASH_SIZE = 20;
+    static constexpr int SALSA20_IV_SIZE = 8;
+
+    class StreamContext
+    {
+    public:
+        std::unique_ptr<IStreamCipher> m_salsa20;
+        std::unique_ptr<IHashFunction> m_sha1;
+    };
+
+    int m_stream_count;
+    std::unique_ptr<StreamContext[]> m_stream_contexts;
+
+    // m_block_hashes[BLOCK_HASHES_COUNT][numStreams][HASH_SIZE]
+    std::unique_ptr<uint8_t[]> m_block_hashes;
+    std::unique_ptr<unsigned int[]> m_stream_block_indices;
+
+    AbstractSalsa20Processor(int streamCount, std::string& zoneName, const uint8_t* salsa20Key, size_t keySize);
+
+    _NODISCARD uint8_t* GetHashBlock(int streamNumber) const;
+
+    void InitStreams(std::string& zoneName, const uint8_t* salsa20Key, size_t keySize) const;
+
+public:
+    virtual ~AbstractSalsa20Processor() = default;
+    AbstractSalsa20Processor(const AbstractSalsa20Processor& other) = delete;
+    AbstractSalsa20Processor(AbstractSalsa20Processor&& other) noexcept = default;
+    AbstractSalsa20Processor& operator=(const AbstractSalsa20Processor& other) = delete;
+    AbstractSalsa20Processor& operator=(AbstractSalsa20Processor&& other) noexcept = default;
+
+    void GetCapturedData(const uint8_t** pCapturedData, size_t* pSize) override;
+};