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Arris TM602A password of the day generator
/*
* Arris TM602A password of the day generator
*
* Author of Original JavaScript Version: Raul Pedro Fernandes Santos
* Author of this C# Code: Marcel Valdez Orozco
* Project homepage for JavaScript Version: http://www.borfast.com/projects/arrispwgen
*
* This software is distributed under the Simplified BSD License.
*
* Copyright 2012 Marcel Valdez Orozco. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
namespace PasswordOfTheDay
{
using System;
public class Program
{
public static void Main(string[] args)
{
Console.WriteLine("Arris password of today: {0}", GeneratePassword(DateTime.Now));
}
// TODO: Add some unit testing, just for fun.
public static string GeneratePassword(DateTime date) {
string seed = "MPSJKMDHAI";
string seedeight = seed.Substring(0, 8);
string seedten = seed;
int[][] table1 = {
new[] { 15, 15, 24, 20, 24 },
new[] {13, 14, 27, 32, 10},
new[] {29, 14, 32, 29, 24},
new[] {23, 32, 24, 29, 29},
new[] {14, 29, 10, 21, 29},
new[] {34, 27, 16, 23, 30},
new[] {14, 22, 24, 17, 13}
};
int[][] table2 = {
new[] {0, 1, 2, 9, 3, 4, 5, 6, 7, 8},
new[] {1, 4, 3, 9, 0, 7, 8, 2, 5, 6},
new[] {7, 2, 8, 9, 4, 1, 6, 0, 3, 5},
new[] {6, 3, 5, 9, 1, 8, 2, 7, 4, 0},
new[] {4, 7, 0, 9, 5, 2, 3, 1, 8, 6},
new[] {5, 6, 1, 9, 8, 0, 4, 3, 2, 7}
};
char[] alphanum = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
};
int[] list1 = new int[10];
int[] list2 = new int[10];
int[] list3 = new int[10];
int[] list4 = new int[10];
int[] list5 = new int[10];
int year;
int month;
int dayOfMonth;
int dayOfWeek;
// Now let's generate one password for each day
// For each iteration advance the date one day
// Last two digits of the year
year = date.Year % 100;
// Number of the month (no leading zero; January == 0)
month = date.Month;
// Day of the month
dayOfMonth = date.Day;
// Day of the week. Normally 0 would be Sunday but we need it to be Monday.
dayOfWeek = (int)date.DayOfWeek - 1;
if (dayOfWeek < 0) {
dayOfWeek = 6;
}
// Now build the lists that will be used by each other.
// list1
for (int i = 0; i <= 4; i++) {
list1[i] = table1[dayOfWeek][i];
}
list1[5] = dayOfMonth;
if (((year + month) - dayOfMonth) < 0) {
list1[6] = (((year + month) - dayOfMonth) + 36) % 36;
} else {
list1[6] = ((year + month) - dayOfMonth) % 36;
}
list1[7] = (((3 + ((year + month) % 12)) * dayOfMonth) % 37) % 36;
// list2
for (int i = 0; i <= 7; i++) {
list2[i] = (seedeight.Substring(i, 1)[0]) % 36;
}
// list3
for (int i = 0; i <= 7; i++) {
list3[i] = (((list1[i] + list2[i])) % 36);
}
list3[8] = (list3[0] + list3[1] + list3[2] + list3[3] + list3[4] +
list3[5] + list3[6] + list3[7]) % 36;
int num8 = list3[8] % 6;
list3[9] = (int)Math.Round(Math.Pow(num8, 2));
// list4
for (int i = 0; i <= 9; i++) {
list4[i] = list3[table2[num8][i]];
}
// list5
for (int i = 0; i <= 9; i++) {
list5[i] = ((seedten.Substring(i, 1)[0]) + list4[i]) % 36;
}
// Finally, build the password of the day.
int len = list5.Length;
char[] passwordOfTheDay = new char[len];
for (int i = 0; i < len; i++) {
passwordOfTheDay[i] = alphanum[list5[i]];
}
return new String(passwordOfTheDay);
}
}
}
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