c语言实现sm4加密
时间: 2024-05-12 13:11:14 浏览: 129
SM4 C语言实现
SM4加密算法是一种分组密码算法,适用于非对称加密,其加密和解密过程使用相同的算法和密钥。以下是一个c语言实现SM4加密的例子:
<<引用:>>
```c
#include <stdio.h>
#include <string.h>
#define uint8 unsigned char
#define uint32 unsigned long int
uint32 GETU32(const uint8 *buf) {
return ((uint32)buf << 24) | ((uint32)buf << 16) | ((uint32)buf << 8) | ((uint32)buf);
}
void PUTU32(uint32 val, uint8 *buf) {
buf = (uint8)(val >> 24); buf = (uint8)(val >> 16); buf = (uint8)(val >> 8); buf = (uint8)val;
}
void SM4_setkey_enc(SM4_KEY *key, const unsigned char *user_key) {}
void SM4_encrypt(const unsigned char *indata, unsigned char *outdata, const SM4_KEY *key) {}
int main() {
SM4_KEY key;
const uint8 user_key[] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10};
const uint8 data[] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10};
uint8 out[sizeof(data)];
SM4_setkey_enc(&key, user_key);
SM4_encrypt(data, out, &key);
return 0;
}
```
<<引用:>>
由于C语言实现SM4加密算法需要的代码量较大,上面提供的代码仅供参考,具体实现还需要进一步完善。
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