89PuC9Br

1#include <openssl/hmac.h>
2#include <string.h>
3#include <stdio.h>
4#include "generics.h"
5#include <curl/curl.h>
6#include <sys/time.h>
7 
8char* btimestamp(){
9 
10 
11      struct timeval tv;
12      gettimeofday(&tv,NULL);
13      long long timems = (((long long)tv.tv_sec)*1000)+(tv.tv_usec/1000);
14      char* tmpstr =(char *) malloc(sizeof(char)*256);
15      sprintf(tmpstr, "%lld", timems);
16      return tmpstr;
17 
18}
19 
20char* concat(const char *s1, const char *s2)
21{
22    const size_t len1 = strlen(s1);
23    const size_t len2 = strlen(s2);
24    char *result =(char*) malloc(len1 + len2 + 1); // +1 for the null-terminator
25    //  check for errors in malloc here
26    memcpy(result, s1, len1);
27    memcpy(result + len1, s2, len2 + 1); // +1 to copy the null-terminator
28    return result;
29}
30 
31 char* bhmac(char* data) {
32
33	  unsigned char *key = SECRETKEY;
34	  unsigned char *result;
35	  int result_len = 32;
36	  int i;
37	  //static char res_hexstring[32];
38	  char *resptr = (char*)malloc(sizeof(char)*32);
39	  result = HMAC(EVP_sha256(), key, strlen((char *)key), data, strlen((char *)data), NULL, NULL);
40	  for (i = 0; i < result_len; i++) {
41	    sprintf(&(resptr[i * 2]), "%02x", result[i]);
42	  }
43	  return resptr;
44 }
45 
46int main() {
47 
48    char *timestamp = btimestamp();
49    char *shastr = concat(partreq, timestamp);
50    char *computehmac = bhmac(shastr); //with this call valgrind crash
51 
52/* other code here */
53    free(timestamp);
54    free(shastr);
55    free(computehmac);
56   
57}