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#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <openssl/evp.h>
void hextorb(uint8_t* hex, uint8_t* rb)
{
while(sscanf(hex, "%2x", rb) == 1)
{
hex += 2;
rb += 1;
}
*rb = '\0';
}
int main(int argc, char** argv)
{
uint8_t k_user[2048];
uint8_t salt[2048];
uint8_t key[4096];
uint32_t key_length = atoi(argv[1]);
uint32_t iteration_count = atoi(argv[2]);
hextorb(argv[3], salt);
uint32_t salt_length = strlen(argv[3]) / 2;
fgets(k_user, 2048, stdin);
uint32_t k_user_length = strlen(k_user);
if(k_user[k_user_length - 1] == '\n') {
k_user[k_user_length - 1] = '\0';
}
PKCS5_PBKDF2_HMAC(k_user, k_user_length, salt, salt_length, iteration_count, EVP_sha512(), key_length, key);
fwrite(key, 1, key_length, stdout);
return 0;
}
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