rc4对16进制数进行加密c++
时间: 2024-01-14 18:03:33 浏览: 23
以下是使用RC4算法对16进制数进行加密的C++示例代码:
```cpp
#include <iostream>
#include <cstring>
using namespace std;
class RC4 {
private:
unsigned char S[256];
int x, y;
void swap(unsigned char &a, unsigned char &b) {
a ^= b;
b ^= a;
a ^= b;
}
public:
RC4() {}
void init(unsigned char *key, int keylen) {
x = y = 0;
for (int i = 0; i < 256; i++) {
S[i] = i;
}
int j = 0;
for (int i = 0; i < 256; i++) {
j = (j + S[i] + key[i % keylen]) % 256;
swap(S[i], S[j]);
}
}
void crypt(unsigned char *data, int datalen) {
int t;
for (int i = 0; i < datalen; i++) {
x = (x + 1) % 256;
y = (y + S[x]) % 256;
swap(S[x], S[y]);
t = (S[x] + S[y]) % 256;
data[i] ^= S[t];
}
}
};
int main() {
unsigned char key[] = {0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0};
unsigned char data[] = {0x12, 0x34, 0x56, 0x78};
int keylen = sizeof(key) / sizeof(unsigned char);
int datalen = sizeof(data) / sizeof(unsigned char);
RC4 rc4;
rc4.init(key, keylen);
rc4.crypt(data, datalen);
cout << "Encrypted data: ";
for (int i = 0; i < datalen; i++) {
printf("%02x ", data[i]);
}
cout << endl;
return 0;
}
```
在示例中,我们使用了一个RC4类来封装RC4算法。首先,我们使用init()方法初始化RC4类的S盒,然后使用crypt()方法对数据进行加密。示例中的key和data都是16进制数,可以自行修改为需要加密的数据。最后输出加密后的结果,可用于后续的解密。