
/*
 * Copyright (c) 2015 Paul Fariello <paul@fariello.eu>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdlib.h>

#include "kickpass.h"

#include "password.h"

char charset[] = 
	"abcdefghijklmnopqrstuvwxyz"
	"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	"0123456789"
	"{}()[].:,;!?<>#$&'@+-/*=%^_|~\\";

/**
 * Generate a truly random password.
 *
 * password must be pre-allocated with at least len+1 bytes
 * len      specify the password len without the terminating null byte 
 *
 * Always return a null terminated password.
 */
kp_error_t kp_password_generate(char *password, size_t len)
{
	int i;
	for (i = 0; i < len; i++) {
		password[i] = charset[arc4random_uniform(sizeof(charset) - 1)];
	}

	password[len] = '\0';

	return KP_SUCCESS;
}
