OpenSSL/GMSSL EVP接口说明——2.8 MAC示例代码

2.8 MAC示例代码

#include "openssl/hmac.h"

int test_evp_hmac_sm3()

{

        const EVP_MD *md = NULL;

        int flag, dlen1, dlen2;

        unsigned char key[16]={0x66,0xc7,0xf0,0xf4, 0x62,0xee,0xed,0xd9, 0xd1,0xf2,0xd4,0x6b, 0xdc,0x10,0xe4,0xe2};

        unsigned char msg[64]={      

                 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 

                 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64,

                 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64,

                 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64, 0x61,0x62,0x63,0x64   

        };

        unsigned char digest1[64],digest2[64], *pdata = NULL;

        HMAC_CTX ctx, ctx2;

printf("\n************************************************************\n");

        printf("测试OpenSSL HMAC SM3\n\n");

        md = EVP_sm3();

        HMAC_CTX_init(&ctx);

        flag = HMAC_Init(&ctx, key, sizeof(key), md);  

        flag = HMAC_Update(&ctx, msg, sizeof(msg));

        flag = HMAC_Final(&ctx, digest1, &dlen1);

        HMAC_CTX_cleanup(&ctx);

        pdata = HMAC( md, key, sizeof(key), msg, sizeof(msg), digest2, &dlen2);

        flag = ( memcmp(digest1, digest2, dlen1) == 0 );

        printf("flag = %d\n\n", flag);

        return 1;

}