Function gen_challenge

authenticate.c:61–81

Generate a challenge buffer and return it base64-encoded. */

/* Generate a challenge buffer and return it base64-encoded. */
static void gen_challenge(const char *addr, char *challenge)
{
	char input[32];
	char digest[MAX_DIGEST_LEN];
	struct timeval tv;
	int len;

	memset(input, 0, sizeof input);

	strlcpy(input, addr, 17);
	sys_gettimeofday(&tv);
	SIVAL(input, 16, tv.tv_sec);
	SIVAL(input, 20, tv.tv_usec);
	SIVAL(input, 24, getpid());

	len = sum_init(valid_auth_checksums.negotiated_nni, 0);
	sum_update(input, sizeof input);
	sum_end(digest);

	base64_encode(digest, len, challenge, 0);
}

/* Generate an MD4 hash created from the combination of the password
 * and the challenge string and return it base64-encoded. */