Question

in C++, Design a program that asks the user to enter a password, and then analyze the password, and then analyze the password for the following weaknesses:

1. Fewer than 8 characters

2. Does not contain at least one uppercase letter and one lowercase latter

3. Does not contain at least one numeric digit

4. Does not contain at least one special character( a character that is not a letter or numeric digit)

5. Is a sequence of consecutive uppercase letters ( such as ABCDE)

6. Is a sequence of censecutive lowercase letters (such as abcd)

7. Is a sequence of consecutive numeric digits (such as 12345)

8. Is a repeating sequence of characters (such as ZZZZZ or 55555) The program should display messages indicating whether any of these weaknesses are found in the password.

Answer 1

Code:

#include <iostream>
using namespace std;

void PasswordChecker(string& input)
{
int n = input.length();
int uppercase,lowercase,numbers;
bool hasLower = false, hasUpper = false;
bool hasDigit = false, specialChar = false;
string normalChars = "abcdefghijklmnopqrstu"
"vwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890 ";

for (int i = 0; i < n; i++) {
if (islower(input[i])) //Condition 2
hasLower = true;
if (isupper(input[i])) //Condition 3
hasUpper = true;
if (isdigit(input[i])) //Condition 4
hasDigit = true;
if (input[i] >= 'A' && input[i] <= 'Z')
uppercase++;
if(input[i] >= 'a' && input[i] <= 'z')
lowercase++;
if (input[i] >= '0' && input[i] <= '9')
numbers++;

size_t special = input.find_first_not_of(normalChars);
if (special != string::npos)
specialChar = true; //Condition 5
}

// Strength of password
cout << "Password is :-";

if (hasLower && hasUpper && hasDigit &&
specialChar && (uppercase > 5) && (numbers > 5) &&(lowercase > 5) && (n >= 8))
cout << "Strong" << endl;
else if ((hasLower || hasUpper) &&
specialChar && (uppercase < 5) && (numbers < 5) &&(lowercase < 5) &&(n < 8))
cout << "Weak" << endl;
else
cout << "Weak" << endl;
}

// Driver code
int main()
{
string input ;
cout<<"Enter Password:"<<endl;
getline(cin,input);
PasswordChecker(input);
return 0;
}

ScreenShots:

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