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| using System;
using System.Collections.Generic;
using System.Text;
namespace Utils
{
class PasswordValidator
{
/// <summary>
/// The specials array must be declared in sorted order
/// </summary>
internal static readonly char[] specials = { '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', ':', ';', '<', '=', '>', '?', '@', '[', '\\', ']', '^', '_', '`', '|', '~' };
/// <summary>
/// Every character type must be in the password exactly 2 times.
/// </summary>
/// <param name="password"></param>
/// <param name="requiredLenght"></param>
/// <returns></returns>
public static bool IsPasswordValid(string password, int requiredLenght)
{
return IsPasswordValid(password, requiredLenght, 2, 2, 2, 2);
}
public static bool IsPasswordValid(string password, int requiredLenght, int lower, int upper, int digits, int specials)
{
if (password.Length == requiredLenght)
{
return CheckLower(password, lower) &&
CheckUpper(password, upper) &&
CheckDigits(password, digits) &&
CheckSpecials(password, specials);
}
return false;
}
/// <summary>
/// Check for requiredLenght special characters
/// </summary>
/// <param name="password"></param>
/// <param name="requiredLenght"></param>
/// <returns></returns>
public static bool CheckSpecials(string password, int requiredLenght)
{
int count = 0;
foreach (char c in specials)
{
if (Array.BinarySearch(specials, c) >= 0)
{
count++;
}
if (count == requiredLenght)
{
return true;
}
}
return false;
}
/// <summary>
/// Check for requiredLenght letters in upper case
/// </summary>
/// <param name="password"></param>
/// <param name="requiredLenght"></param>
/// <returns></returns>
public static bool CheckUpper(string password, int requiredLenght)
{
int count = 0;
foreach (char c in password)
{
if (c >= 'A' && c <= 'Z')
{
count++;
}
if (count == requiredLenght)
{
return true;
}
}
return false;
}
/// <summary>
/// Check for requiredLenght letters in lower case
/// </summary>
/// <param name="password"></param>
/// <param name="requiredLenght"></param>
/// <returns></returns>
public static bool CheckLower(string password, int requiredLenght)
{
int count = 0;
foreach (char c in password)
{
if (c >= 'a' && c <= 'z')
{
count++;
}
if (count == requiredLenght)
{
return true;
}
}
return false;
}
/// <summary>
/// Check for requiredLenght digits
/// </summary>
/// <param name="password"></param>
/// <param name="requiredLenght"></param>
/// <returns></returns>
public static bool CheckDigits(string password, int requiredLenght)
{
int count = 0;
foreach (char c in password)
{
if (c >= '0' && c <= '9')
{
count++;
}
if (count == requiredLenght)
{
return true;
}
}
return false;
}
}
} |
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