Zi 字媒體

純C/C++ MD5 資料來源:https://mp.weixin.qq.com/s/BHlaHN2_c2tx8D56FjfkZw GITHUB: https://github.com/jash-git/C_MD5 code: #include #include #include "md5.h" #include #include #include #include /* //字串範例 int main( void ) { int read_len; int i ; char temp[8]={0}; unsigned char digest[16]; //存放结果 char hexbuf[128]="12334567"; unsigned char decrypt[16]={0}; unsigned char decrypt32[64]={0}; MD5_CTX md5c; MD5Init(&md5c); //初始化 read_len = strlen(hexbuf); MD5Update(&md5c,(unsigned char *)hexbuf,read_len); MD5Final(&md5c,decrypt); strcpy((char *)decrypt32,""); for(i=0;i<16;i++) { sprintf(temp,"x",decrypt[i]); strcat((char *)decrypt32,temp); } printf("md5:%s\n",decrypt32); return 0; } */ //檔案範例 #define FORWORD_FW "main.c" int calc_md5(char*filename,char*dest) { int i; int filelen = 0; int read_len; char temp[8]={0}; char hexbuf[128]={0}; unsigned char decrypt[16]={0}; unsigned char decrypt32[64]={0}; MD5_CTX md5; char fw_path[128]; int fdf; fdf = open(filename,O_RDWR); if(fdf<0) { printf("%s not exist\n",FORWORD_FW); return -1; } MD5Init(&md5); while(1) { read_len = read(fdf, hexbuf,sizeof(hexbuf)); if (read_len <0) { close(fdf); return -1; } if(read_len==0) { break; } filelen += read_len; MD5Update(&md5,(unsigned char *)hexbuf,read_len); } MD5Final(&md5,decrypt); strcpy((char *)decrypt32,""); for(i=0;i<16;i++) { sprintf(temp,"x",decrypt[i]); strcat((char *)decrypt32,temp); } strcpy(dest,decrypt32); printf("md5:%s len=%d\n",dest,filelen); close(fdf); return filelen; } int main(int argc, char *argv[]) { int ret; int filelen; char md5_str[64]={0}; char cmd[256]={0}; filelen = calc_md5(FORWORD_FW,md5_str); if(filelen<0) { printf("calc_md5 fail\n"); return -1; } return 0; }