#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>
#include <sodium.h>
#include "../hashing_settings.h"


int main() {
	bool echo_success = false;

	struct termios tios, tios_orig;
	int ret = tcgetattr(0, &tios_orig);
	if (ret == 0) {
		memcpy(&tios, &tios_orig, sizeof(struct termios));
		tios.c_lflag &= ~ECHO;
		ret = tcsetattr(0, TCSANOW, &tios);
		if (ret == 0) echo_success = true;
	}

	if (!echo_success && isatty(0)) {
		fprintf(stderr, "WARNING: Cannot disable ECHO on stdin\n");
	}

	printf("Password: ");
	fflush(stdout);

	char *password = NULL;
	size_t passlen = 0;
	ssize_t nr = getline(&password, &passlen, stdin);
	if (nr > 0) {
		printf("\n");

		if (passlen > 0) password[--passlen] = '\0';

		char result[crypto_pwhash_STRBYTES + 1];

		ret = crypto_pwhash_str(
				result, password, passlen,
				PASSHASH_OPSLIMIT, PASSHASH_MEMLIMIT);
		if (ret == 0) {
			result[crypto_pwhash_STRBYTES] = '\0';

			printf("Hashed: %s\n", result);
		}

		sodium_memzero(password, passlen);
	}

	if (echo_success) {
		ret = tcsetattr(0, TCSANOW, &tios_orig);
		if (ret != 0) {
			fprintf(stderr, "WARNING: Cannot reset original termios on stdin\n");
		}
	}
}