幸运哈希游戏代码大全，从原理到实现幸运哈希游戏代码大全

幸运哈希游戏代码大全，从原理到实现幸运哈希游戏代码大全，

本文目录导读：

哈希函数的概述
常见哈希算法
哈希函数的代码实现
哈希函数的优化技巧

哈希函数的概述

哈希函数是一种数学函数，它能够将任意长度的输入数据（称为“消息”）映射到一个固定长度的输出值（称为“哈希值”或“哈希码”），哈希函数的核心特性是确定性，即相同的输入总是会生成相同的哈希值,而不同的输入通常会产生不同的哈希值。

在游戏开发中,哈希函数可以用于多种场景，

生成随机数
验证玩家行为（如登录验证）
计算玩家评分
生成唯一标识符
防止哈希碰撞（即避免不同的输入生成相同的哈希值）

常见哈希算法

在幸运哈希游戏中,常用的哈希算法包括：

MD5：一种经典的哈希算法，输出长度为128位，虽然MD5在某些情况下仍然被使用,但在现代加密中已不被视为安全。
SHA-1：一种160位的哈希算法,被认为是MD5的改进版本。
SHA-256：一种256位的哈希算法,广泛应用于加密领域。
CRC32：一种常用的循环冗余校验算法,常用于文件校验。
BLAKE2：一种现代的哈希算法，性能优于SHA-256。

以下将分别介绍这些哈希算法的原理及其代码实现。

哈希函数的代码实现

为了方便读者，我们将分别提供C++和Python语言的哈希函数实现代码。

C++实现

（1）MD5哈希

MD5是一种经典的哈希算法，代码实现较为复杂，以下是MD5哈希函数的C++实现：

#include <iostream>
#include <vector>
#include <string>
#include <cmath>
using namespace std;
vector<int> AddRoundKeys(const vector<int>& state, const vector<int>& key) {
    for (int i = 0; i < 20; ++i) {
        state[i] ^= key[i];
    }
    return state;
}
void MD5Final(const vector<int>& state, int* hash) {
    int T0, T1, T2, T3;
    T0 = (state[0] >> 1) ^ (state[0] >> 30);
    T1 = (state[1] >> 0) ^ (state[1] >> 28) & 0x1F;
    T2 = (state[2] >> 0) ^ (state[2] >> 28) & 0x3F;
    T3 = (state[3] >> 0) ^ (state[3] >> 28) & 0x7F;
    hash[0] = (state[0] >> 1) ^ T0;
    hash[1] = (state[1] >> 1) ^ T1;
    hash[2] = (state[2] >> 1) ^ T2;
    hash[3] = (state[3] >> 1) ^ T3;
}
void MD5(const char* buffer, int* hash) {
    const static int initial[4][4] = {
        {0x7F, 0x80, 0x81, 0x82},
        {0xE0, 0x00, 0x82, 0x82},
        {0x00, 0xE0, 0x00, 0x82},
        {0x82, 0x82, 0x82, 0x82}
    };
    int state[4][4] = {0};
    int i, j, k, t, temp;
    char b[4][4] = {0};
    for (i = 0; i < 16; ++i) {
        for (j = 0; j < 4; ++j) {
            b[j][i / 4] = (buffer[i * 4 + j] >> (2 - j)) & 0x0F;
        }
    }
    for (i = 0; i < 16; ++i) {
        for (j = 0; j < 4; ++j) {
            state[j][i / 4] = b[j][i / 4] ^ initial[j][i / 4];
        }
    }
    for (i = 16; i < 64; ++i) {
        int round = i / 4;
        int f, g, h, t;
        f = (state[0][round] & 0x80) ? 1 : 0;
        g = state[1][round] & 0x80 ? 1 : 0;
        h = state[2][round] & 0x80 ? 1 : 0;
        t = state[3][round] & 0x80 ? 1 : 0;
        state[0][round] = (state[0][round] >> 1) ^ t;
        state[1][round] = (state[1][round] >> 1) ^ f;
        state[2][round] = (state[2][round] >> 1) ^ g;
        state[3][round] = (state[3][round] >> 1) ^ h;
        if (round != 16) {
            f = state[0][round] & 0x80 ? 1 : 0;
            g = state[1][round] & 0x80 ? 1 : 0;
            h = state[2][round] & 0x80 ? 1 : 0;
            t = state[3][round] & 0x80 ? 1 : 0;
            state[0][round] = (state[0][round] >> 1) ^ t;
            state[1][round] = (state[1][round] >> 1) ^ f;
            state[2][round] = (state[2][round] >> 1) ^ g;
            state[3][round] = (state[3][round] >> 1) ^ h;
        }
    }
    MD5Final(state, hash);
}
int main() {
    const char* input = "Hello, world!";
    int hash[4];
    MD5(input, hash);
    cout << "MD5 hash: " << hex << hash[0] << " " << hash[1] << " " << hash[2] << " " << hash[3] << endl;
    return 0;
}

（2）SHA-256

SHA-256是一种256位的哈希算法，代码实现较为复杂，以下是SHA-256哈希函数的C++实现：

#include <iostream>
#include <vector>
#include <string>
#include <cstdint>
using namespace std;
vector<uint8_t> expand(const vector<uint8_t>& input, int length) {
    vector<uint8_t> result = input;
    for (int i = 0; i < 8; ++i) {
        uint8_t b = (input[i] >> 7) & 0x1;
        for (int j = 0; j < 7; ++j) {
            result[i * 8 + j] ^= (input[i] >> (6 - j)) & 0x1C;
        }
        result[i * 8 + 7] ^= (input[i] >> 7) & 0x1C;
        result[i * 8 + 7] ^= b;
    }
    for (int i = 8; i < length; ++i) {
        uint8_t b = (result[i - 8] >> 7) & 0x1C;
        for (int j = 0; j < 7; ++j) {
            result[i - 1 + j] ^= (result[i - 8] >> (6 - j)) & 0x1C;
        }
        result[i - 1 + 7] ^= (result[i - 8] >> 7) & 0x1C;
        result[i - 1 + 7] ^= ((result[i - 8] >> 7) & 0x1C) ^ b;
    }
    return result;
}
void SHA256(const vector<uint8_t>& input, uint64_t* hash) {
    const static uint8_t initial[64] = {
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };
    uint8_t state[64];
    for (int i = 0; i < 64; ++i) {
        state[i] = initial[i];
    }
    for (int i = 0; i < input.size(); ++i) {
        for (int j = 0; j < 8; ++j) {
            state[i + j] ^= input[i * 8 + j];
        }
    }
    for (int i = 0; i < 64; ++i) {
        uint8_t b = state[i];
        uint8_t c = state[i + 8];
        uint8_t d = state[i + 16];
        uint8_t e = state[i + 24];
        uint8_t f = state[i + 32];
        uint8_t g = state[i + 40];
        uint8_t h = state[i + 48];
        uint8_t t0 = (b & c) | ((~b) & d);
        uint8_t t1 = (c & d) | ((~c) & e);
        uint8_t t2 = (d & e) | ((~d) & f);
        uint8_t t3 = (e & f) | ((~e) & g);
        uint8_t t4 = (f & g) | ((~f) & h);
        uint8_t t5 = (g & h) | ((~g) & b);
        uint8_t t6 = (h & b) | ((~h) & c);
        uint8_t t7 = (b & c) | ((~b) & d);
        state[i] = t0;
        state[i + 8] = t1;
        state[i + 16] = t2;
        state[i + 24] = t3;
        state[i + 32] = t4;
        state[i + 40] = t5;
        state[i + 48] = t6;
        state[i + 56] = t7;
    }
    uint64_t hash[2] = {0};
    hash[0] = state[0] | (state[1] << 8) | (state[2] << 16) | (state[3] << 24);
    hash[1] = state[4] | (state[5] << 8) | (state[6] << 16) | (state[7] << 24);
    hash[0] = hash[0] + 0x0000000000000001;
    hash[1] = hash[1] + 0xffffffffffffffff;
    hash[0] &= 0xffffffffffffffff;
    hash[1] &= 0xffffffffffffffff;
}
int main() {
    const char* input = "Hello, world!";
    uint64_t hash[2];
    SHA256(input, hash);
    cout << "SHA-256 hash: " << hex << hash[0] << " " << hash[1] << endl;
    return 0;
}

（3）BLAKE2

BLAKE2是一种现代的哈希算法，代码实现较为简洁，以下是BLAKE2哈希函数的C++实现：

#include <iostream>
#include <vector>
#include <string>
#include <cstdint>
using namespace std;
void BLAKE2(const vector<uint8_t>& input, uint64_t* hash) {
    const static uint8_t initial[16] = {
        0x00000000, 0x00000001, 0x00000002, 0x00000003, 0x00000004, 0x00000005, 0x00000006, 0x00000007,
        0x00000008, 0x00000009, 0x0000000a, 0x0000000b, 0x0000000c, 0x0000000d, 0x0000000e, 0x0000000f
    };
    uint8_t state[4][4];
    for (int i = 0; i < 4; ++i) {
        for (int j = 0; j < 4; ++j) {
            state[i][j] = initial[i * 4 + j];
        }
    }
    for (int i = 0; i < input.size(); ++i) {
        for (int j = 0; j < 4; ++j) {
            state[j][i / 4] ^= input[i * 4 + j];
        }
    }
    for (int i = 0; i < 16; ++i) {
        uint8_t a = state[0][i / 4];
        uint8_t b = state[1][i / 4];
        uint8_t c = state[2][i / 4];
        uint8_t d = state[3][i / 4];
        a = (a << 5) | (a >> 3) ^ (a & 0x1f);
        b = (b << 5) | (b >> 3) ^ (b & 0x1f);
        c = (c << 5) | (c >> 3) ^ (c & 0x1f);
        d = (d << 5) | (d >> 3) ^ (d & 0x1f);
        state[0][i / 4] = a ^ state[0][i / 4];
        state[1][i / 4] = b ^ state[1][i / 4];
        state[2][i / 4] = c ^ state[2][i / 4];
        state[3][i / 4] = d ^ state[3][i / 4];
    }
    uint64_t hash[2] = {0};
    hash[0] = state[0][0] | (state[1][0] << 8) | (state[2][0] << 16) | (state[3][0] << 24);
    hash[1] = state[0][1] | (state[1][1] << 8) | (state[2][1] << 16) | (state[3][1] << 24);
    hash[0] = hash[0] ^ 0x0000000000000001;
    hash[1] = hash[1] ^ 0xffffffffffffffff;
    hash[0] &= 0xffffffffffffffff;
    hash[1] &= 0xffffffffffffffff;
}
int main() {
    const char* input = "Hello, world!";
    uint64_t hash[2];
    BLAKE2(input, hash);
    cout << "BLAKE2 hash: " << hex << hash[0] << " " << hash[1] << endl;
    return 0;
}