Initial commit: wowee native WoW 3.3.5a client

include/auth/big_num.hpp

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <vector>
+#include <cstdint>
+#include <string>
+#include <openssl/bn.h>
+
+namespace wowee {
+namespace auth {
+
+// Wrapper around OpenSSL BIGNUM for big integer arithmetic
+class BigNum {
+public:
+    BigNum();
+    explicit BigNum(uint32_t value);
+    explicit BigNum(const std::vector<uint8_t>& bytes, bool littleEndian = true);
+    ~BigNum();
+
+    // Copy/move operations
+    BigNum(const BigNum& other);
+    BigNum& operator=(const BigNum& other);
+    BigNum(BigNum&& other) noexcept;
+    BigNum& operator=(BigNum&& other) noexcept;
+
+    // Factory methods
+    static BigNum fromRandom(int bytes);
+    static BigNum fromHex(const std::string& hex);
+    static BigNum fromDecimal(const std::string& dec);
+
+    // Arithmetic operations
+    BigNum add(const BigNum& other) const;
+    BigNum subtract(const BigNum& other) const;
+    BigNum multiply(const BigNum& other) const;
+    BigNum mod(const BigNum& modulus) const;
+    BigNum modPow(const BigNum& exponent, const BigNum& modulus) const;
+
+    // Comparison
+    bool equals(const BigNum& other) const;
+    bool isZero() const;
+
+    // Conversion
+    std::vector<uint8_t> toArray(bool littleEndian = true, int minSize = 0) const;
+    std::string toHex() const;
+    std::string toDecimal() const;
+
+    // Direct access (for advanced operations)
+    BIGNUM* getBN() { return bn; }
+    const BIGNUM* getBN() const { return bn; }
+
+private:
+    BIGNUM* bn;
+};
+
+} // namespace auth
+} // namespace wowee