Program to check Strength of Password

A password is said to be strong if it satisfies the following criteria:

  1. It contains at least one lowercase English character.
  2. It contains at least one uppercase English character.
  3. It contains at least one special character. The special characters are: !@#$%^&*()-+
  4. Its length is at least 8.
  5. It contains at least one digit.

Given a string, find its strength. Let a strong password is one that satisfies all above conditions. A moderate password is one that satisfies first three conditions and has length at least 6. Otherwise password is week.

Examples : 

Input : "GeeksforGeeks!@12"
Output : Strong

Input : "gfg!@12"
Output : Moderate

C++

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// C++ program to check if a given password is
// strong or not.
#include <bits/stdc++.h>
using namespace std;
  
void printStrongNess(string& input)
{
    int n = input.length();
  
    // Checking lower alphabet in string
    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]))
            hasLower = true;
        if (isupper(input[i]))
            hasUpper = true;
        if (isdigit(input[i]))
            hasDigit = true;
  
        size_t special = input.find_first_not_of(normalChars);
        if (special != string::npos)
            specialChar = true;
    }
  
    // Strength of password
    cout << "Strength of password:-";
    if (hasLower && hasUpper && hasDigit && 
        specialChar && (n >= 8))
        cout << "Strong" << endl;
    else if ((hasLower || hasUpper) && 
             specialChar && (n >= 6))
        cout << "Moderate" << endl;
    else
        cout << "Weak" << endl;
}
  
// Driver code
int main()
{
    string input = "GeeksforGeeks!@12";
    printStrongNess(input);
    return 0;
}

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# Python3 program to check if a given  


# password is strong or not.  


def printStrongNess(input_string): 


      


    n = len(input_string)  


  


    # Checking lower alphabet in string  


    hasLower = False


    hasUpper = False


    hasDigit = False


    specialChar = False


    normalChars = "abcdefghijklmnopqrstu"


    "vwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890 "


      


    for i in range(n): 


        if input_string[i].islower(): 


            hasLower = True


        if input_string[i].isupper(): 


            hasUpper = True


        if input_string[i].isdigit(): 


            hasDigit = True


        if input_string[i] not in normalChars: 


            specialChar = True


  


    # Strength of password  


    print("Strength of password:-", end = "") 


    if (hasLower and hasUpper and 


        hasDigit and specialChar and n >= 8): 


        print("Strong") 


          


    elif ((hasLower or hasUpper) and 


          specialChar and n >= 6): 


        print("Moderate") 


    else: 


        print("Weak") 


  


# Driver code  


if __name__=="__main__":  


      


    input_string = "GeeksforGeeks!@12"


      


    printStrongNess(input_string) 


  


# This code is contributed by Yash_R 



















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Output:


Strength of password:-Strong


This article is contributed by Apurva Agarwal. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.


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