40 lines
1008 B
C
40 lines
1008 B
C
#include "../hmac_sha256.h"
|
|
|
|
#include <assert.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define SHA256_HASH_SIZE 32
|
|
|
|
int main() {
|
|
const char* str_data = "Hello World!";
|
|
const char* str_key = "super-secret-key";
|
|
uint8_t out[SHA256_HASH_SIZE];
|
|
char out_str[SHA256_HASH_SIZE * 2 + 1];
|
|
unsigned i;
|
|
|
|
// Call hmac-sha256 function
|
|
hmac_sha256(str_key, strlen(str_key), str_data, strlen(str_data), &out,
|
|
sizeof(out));
|
|
|
|
// Convert `out` to string with printf
|
|
memset(&out_str, 0, sizeof(out_str));
|
|
for (i = 0; i < sizeof(out); i++) {
|
|
snprintf(&out_str[i*2], 3, "%02x", out[i]);
|
|
}
|
|
|
|
// Print out the result
|
|
printf("Message: %s\n", str_data);
|
|
printf("Key: %s\n", str_key);
|
|
printf("HMAC: %s\n", out_str);
|
|
|
|
// This assertion fails if something went wrong
|
|
assert(strncmp(
|
|
out_str,
|
|
"4b393abced1c497f8048860ba1ede46a23f1ff5209b18e9c428bddfbb690aad8",
|
|
SHA256_HASH_SIZE * 2) == 0);
|
|
return 0;
|
|
}
|