1. 命令行格式验证sm3 hmac
echo -n "abc" | openssl dgst -sm3 -hmac "01234567890123456789012345678901" 说明： 1. 01234567890123456789012345678901 为字符串key，共32位 2. echo -n "abc"，共abc3个字符长度，不包含任何其他字符 执行如下： root@ubuntu:/work2/learn/openssl/sm3# echo -n "abc" | openssl dgst -sm3 -hmac "01234567890123456789012345678901" (stdin)= ce68f88b05a45a87303a2a3eca942e46d4dce6d06596fa52b3fc0ce43440d5dc
2. 基于C语标题言使用openssl api接口实现 sm3 sm3_hmac
root@ubuntu:/work2/learn/openssl/sm3# ./sm3_hmac_demo hamc hmac_excepted_len 32: ce 68 f8 8b 05 a4 5a 87 30 3a 2a 3e ca 94 2e 46 d4 dc e6 d0 65 96 fa 52 b3 fc 0c e4 34 40 d5 dc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
代码.
// 编译// 编译：gcc -g sm3_hmac_demo.c -o sm3_hmac_demo -L/usr/lib -lssl -lcrypto#include<stdio.h>#include<string.h>#include<openssl/evp.h>#include<openssl/x509v3.h>#include<openssl/hmac.h>voidsm3_hmac(constEVP_MD*evp_md,constvoid*key,intkey_len,constunsignedchar*d,size_tn,unsignedchar*md,unsignedint*md_len){HMAC_CTX*c=NULL;if((c=HMAC_CTX_new())==NULL){printf("%s %d \n",__func__,__LINE__);gotoerr;}if(!HMAC_Init_ex(c,key,key_len,evp_md,NULL)){printf("%s %d \n",__func__,__LINE__);gotoerr;}if(!HMAC_Update(c,d,n)){printf("%s %d \n",__func__,__LINE__);gotoerr;}if(!HMAC_Final(c,md,md_len)){printf("%s %d \n",__func__,__LINE__);gotoerr;}HMAC_CTX_free(c);err:HMAC_CTX_free(c);}intmain(){unsignedcharkey[]="01234567890123456789012345678901";unsignedchardata[]={'a','b','c','0'};unsignedcharhmac_value[64];unsignedinthmac_excepted_len;memset(hmac_value,0,sizeof(hmac_value));// sm3_hmac(EVP_sm3(),key,sizeof(key),data,sizeof(data),hmac_value,&hmac_excepted_len);HMAC(EVP_sm3(),key,sizeof(key),data,sizeof(data)-1,hmac_value,&hmac_excepted_len);printf("hamc hmac_excepted_len %d:\n",hmac_excepted_len);inti;for(i=0;i<sizeof(hmac_value);i++){printf("%02x ",hmac_value[i]);}printf("\n");return0;}
