• 日期: 2024-06-18 20:57:35
  • 标签: 常规

以下是使用C语言实现AES和RSA加密算法的示例代码：

AES加密算法实现：

#include <stdio.h>

// 用于AES加密的S盒和逆S盒
unsigned char sBox[256] = {
    0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
    0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
    0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
    0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
    0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
    0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
    0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
    0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
    0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
    0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
    0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
    0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
    0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
    0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
    0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
    0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};

unsigned char invSBox[256] = {
    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
};

// 将4个字节表示的32位整数进行循环左移
void leftShift(unsigned char* word) {
    unsigned char temp = word[0];
    for (int i = 0; i < 3; i++) {
        word[i] = word[i + 1];
    }
    word[3] = temp;
}

// 将4个字节表示的32位整数进行按位异或
void xorBytes(unsigned char* a, unsigned char* b, unsigned char* result) {
    for (int i = 0; i < 4; i++) {
        result[i] = a[i] ^ b[i];
    }
}

// 对单个字节进行S盒替换
void subBytes(unsigned char* state) {
    for (int i = 0; i < 16; i++) {
        state[i] = sBox[state[i]];
    }
}

// 对单个字节进行逆S盒替换
void invSubBytes(unsigned char* state) {
    for (int i = 0; i < 16; i++) {
        state[i] = invSBox[state[i]];
    }
}

// 对单个字节进行行移位
void shiftRows(unsigned char* state) {
    unsigned char temp;

    // 第二行循环左移1位
    temp = state[1];
    state[1] = state[5];
    state[5] = state[9];
    state[9] = state[13];
    state[13] = temp;

    // 第三行循环左移2位
    temp = state[2];
    state[2] = state[10];
    state[10] = temp;
    temp = state[6];
    state[6] = state[14];
    state[14] = temp;

    // 第四行循环左移3位
    temp = state[3];
    state[3] = state[15];
    state[15] = state[11];
    state[11] = state[7];
    state[7] = temp;
}

// 对单个字节进行逆行移位
void invShiftRows(unsigned char* state) {
    unsigned char temp;

    // 第二行循环右移1位
    temp = state[13];
    state[13] = state[9];
    state[9] = state[5];
    state[5] = state[1];
    state[1] = temp;

    // 第三行循环右移2位
    temp = state[2];
    state[2] = state[10];
    state[10] = temp;
    temp = state[6];
    state[6] = state[14];
    state[14] = temp;

    // 第四行循环右移3位
    temp = state[3];
    state[3] = state[7];
    state[7] = state[11];
    state[11] = state[15];
    state[15] = temp;
}

// 对单个字节进行列混合
void mixColumns(unsigned char* state) {
    unsigned char temp[4];

    for (int i = 0; i < 4; i++) {
        temp[0] = state[i * 4];
        temp[1] = state[i * 4 + 1];
        temp[2] = state[i * 4 + 2];
        temp[3] = state[i * 4 + 3];

        state[i * 4] = (unsigned char)(mul(0x02, temp[0]) ^ mul(0x03, temp[1]) ^ temp[2] ^ temp[3]);
        state[i * 4 + 1] = (unsigned char)(temp[0] ^ mul(0x02, temp[1]) ^ mul(0x03, temp[2]) ^ temp[3]);
        state[i * 4 + 2] = (unsigned char)(temp[0] ^ temp[1] ^ mul(0x02, temp[2]) ^ mul(0x03, temp[3]));
        state[i * 4 + 3] = (unsigned char)(mul(0x03, temp[0]) ^ temp[1] ^ temp[2] ^ mul(0x02, temp[3]));
    }
}

// 对单个字节进行逆列混合
void invMixColumns(unsigned char* state) {
    unsigned char temp[4];

    for (int i = 0; i < 4; i++) {
        temp[0] = state[i * 4];
        temp[1] = state[i * 4 + 1];
        temp[2] = state[i * 4 + 2];
        temp[3] = state[i * 4 + 3];

        state[i * 4] = (unsigned char)(mul(0x0e, temp[0]) ^ mul(0x0b, temp[1]) ^ mul(0x0d, temp[2]) ^ mul(0x09, temp[3]));
        state[i * 4 + 1] = (unsigned char)(mul(0x09, temp[0]) ^ mul(0x0e, temp[1]) ^ mul(0x0b, temp[2]) ^ mul(0x0d, temp[3]));
        state[i * 4 + 2] = (unsigned char)(mul(0x0d, temp[0]) ^ mul(0x09, temp[1]) ^ mul(0x0e, temp[2]) ^ mul(0x0b, temp[3]));
        state[i * 4 + 3] = (unsigned char)(mul(0x0b, temp[0]) ^ mul(0x0d, temp[1]) ^ mul(0x09, temp[2]) ^ mul(0x0e, temp[3]));
    }
}

// ... (其他AES函数实现)

int main() {
    // ... (AES加密过程实现)

    return 0;
}

RSA加密算法实现：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>

// 扩展欧几里得算法求模逆
int extendedEuclid(int a, int b, int* x, int* y) {
    if (a == 0) {
        *x = 0;
        *y = 1;
        return b;
    }
    int x1, y1;
    int gcd = extendedEuclid(b % a, a, &x1, &y1);
    *x = y1 - (b / a) * x1;
    *y = x1;
    return gcd;
}

// 快速模幂运算
int modPow(int base, int exponent, int modulus) {
    int result = 1;
    base %= modulus;
    while (exponent > 0) {
        if (exponent & 1) {
            result = (result * base) % modulus;
        }
        exponent >>= 1;
        base = (base * base) % modulus;
    }
    return result;
}

// 生成随机素数
int generatePrime(int lowerBound, int upperBound) {
    srand(time(NULL));
    int num = (rand() % (upperBound - lowerBound + 1)) + lowerBound;
    while (!isPrime(num)) {
        num = (rand() % (upperBound - lowerBound + 1)) + lowerBound;
    }
    return num;
}

// 判断是否为素数
int isPrime(int num) {
    if (num <= 1) {
        return 0;
    }
    for (int i = 2; i <= sqrt(num); i++) {
        if (num % i == 0) {
            return 0;
        }
    }
    return 1;
}

// 生成RSA密钥对
void generateKeys(int p, int q, int* publicKey, int* privateKey) {
    int n = p * q;
    int phi = (p - 1) * (q - 1);
    int e = 2;
    while (e < phi && gcd(e, phi) != 1) {
        e++;
    }
    int d, y;
    extendedEuclid(e, phi, &d, &y);
    if (d < 0) {
        d += phi;
    }
    *publicKey = e;
    *privateKey = d;
}

// RSA加密
int encrypt(int message, int publicKey, int n) {
    return modPow(message, publicKey, n);
}

// RSA解密
int decrypt(int ciphertext, int privateKey, int n) {
    return modPow(ciphertext, privateKey, n);
}

int main() {
    // 生成两个随机素数
    int p = generatePrime(10, 100);
    int q = generatePrime(10, 100);

    // 生成公钥和私钥
    int publicKey, privateKey;
    generateKeys(p, q, &publicKey, &privateKey);

    // 明文
    int message = 12345;

    // 加密
    int ciphertext = encrypt(message, publicKey, p * q);

    // 解密
    int decryptedMessage = decrypt(ciphertext, privateKey, p * q);

    printf("明文: %d\n", message);
    printf("密文: %d\n", ciphertext);
    printf("解密后的明文: %d\n", decryptedMessage);

    return 0;
}

注意：

  • 以上代码示例仅供参考，实际应用中需要根据具体情况进行调整和完善。
  • 以上代码示例中使用了随机数生成和素数判断等函数，这些函数的实现可以根据具体情况进行修改。
  • 以上代码示例中没有对加密数据进行填充和格式化处理，实际应用中需要根据具体情况进行处理。
  • 以上代码示例中没有对密钥进行安全存储和管理，实际应用中需要进行安全处理。
C语言实现AES和RSA加密算法：代码示例

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