1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
#include <gcrypt.h>
static inline void crypt_init()
{
gcry_check_version("1.9.4");
}
static inline bool crypt_maccmp(const char *key, const char *query,
const char *hmac)
{
gcry_mac_hd_t hd;
gcry_mac_open(&hd, GCRY_MAC_HMAC_SHA256, GCRY_MAC_FLAG_SECURE, NULL);
gcry_mac_setkey(hd, key, strlen(key));
gcry_mac_write(hd, query, strlen(query));
size_t hmac_sha256_len = 32;
unsigned char hmac_sha256[hmac_sha256_len + 1];
gcry_mac_read(hd, hmac_sha256, &hmac_sha256_len);
gcry_mac_close(hd);
char hmac_sha256_str[65] = { [0] = '\0' };
for (int i = 0; i < hmac_sha256_len; i++)
sprintf(hmac_sha256_str, "%s%02x", hmac_sha256_str,
hmac_sha256[i]);
return !strcmp(hmac, hmac_sha256_str);
}
static inline void crypt_getnonce(char *string, const size_t string_len)
{
string[0] = '\0';
const size_t nonce_len = string_len / 2;
unsigned char nonce[nonce_len + 1];
gcry_create_nonce(nonce, nonce_len);
for (int i = 0; i < nonce_len; i++)
sprintf(string, "%s%02x", string, nonce[i]);
}
|
