Strong Password suggestor
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>
/*
"A strong password is determined by the usage of all characters."
Conditions:
1.at least one upper case,lowercase,special character.
2.at least 8 length.
3.at least 2 numbers
Password suggestor:
Input : keshav123
Output : Suggested Password
k(eshav12G3
keshav1@A23
kesh!Aav123
ke(shav12V3
keGshav1$23
kesXhav@123
keAshav12$3
kesKhav@123
kes$hav12N3
$kesRhav123
Input :rakesh@1995kumar
Output : Your Password is Strong
*/
int random_number(int low, int up){
int x = rand() % (up - low +1) + low;
return x;
}
int random_number1(int low, int up,int special){
int x = rand() % (up - low +1) + low;
if(x != special){
return x;
}
else{
x = random_number1(low, up,special);
}
}
int random_number2(int low, int up,int special,int special2){
int x = rand() % (up - low +1) + low;
if(x != special && x != special2){
return x;
}
else{
x = random_number2(low, up,special,special2);
}
}
int random_number3(int low, int up,int special,int special2,int special3){
int x = rand() % (up - low +1) + low;
if(x != special && x != special2 && x != special3){
return x;
}
else{
x = random_number3(low, up,special,special2,special3);
}
}
int random_number4(int low, int up,int special,int special2,int special3,int special4){
int x = rand() % (up - low +1) + low;
if(x != special && x != special2 && x != special3 && x != special4 ){
return x;
}
else{
x = random_number4(low, up,special,special2,special3,special4);
}
}
int main(){
srand(time(NULL));
char schar[]="#@_&";
char uprchar[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char lwrchar[]="abcdefghijklmnopqrstuvwxyz";
char num[]="1234567890";
int check=0;
bool a=true;
bool b=true;
bool c=true;
bool d=true;
char input[100];
printf("enter your new password : ");
scanf("%s",input);
// TO CHECK WHETHER INPUT IS STRONG---------------------------------------
for(int i=0;i<strlen(input);i++){
for(int j=0;j<4 && a;j++){
if(input[i]==schar[j] ){
a = false;
}
}
}
for(int i=0;i<strlen(input);i++){
for(int j=0;j<strlen(num) && d;j++){
if(input[i]==num[j] ){
check++;
if(check == 2){
d = false;
}
}
}
for(int j=0;j<strlen(lwrchar) && b;j++){
if(input[i]==lwrchar[j] ){
b = false;
}
}
for(int j=0;j<strlen(uprchar) && c;j++){
if(input[i]==uprchar[j] ){
c = false;
}
}
}
if(a != true && b != true && c != true && d != true){
printf("Strong\n");
}
// TO SUGGEST A STRONG PASSWORD:---------------------------------------------
else{
char new_password[100];
int x,y,z,w,u;
if(a == true){
x = random_number(0,strlen(input)-1);
new_password[x] = schar[random_number(0,strlen(schar)-1)];
}
if(b == true){
y = random_number1(0,strlen(input)-1,x);
new_password[y] = lwrchar[random_number(0,strlen(lwrchar)-1)];
}
if(c == true){
z = random_number2(0,strlen(input)-1,x,y);
new_password[z] = uprchar[random_number(0,strlen(uprchar)-1)];
}
if(d == true && check==1){
w = random_number3(0,strlen(input)-1,x,y,z);
new_password[w] = num[random_number(0,strlen(num)-1)];
}
else if(d == true && check != 1){
u = random_number3(0,strlen(input)-1,x,y,z);
new_password[u] = num[random_number(0,strlen(num)-1)];
w = random_number4(0,strlen(input)-1,x,y,z,u);
new_password[w] = num[random_number(0,strlen(num)-1)];
}
int j=0;
for(int i=0;i<=strlen(input);){
if(j==x || j==y || j==z || j== w || j==u){
j++;
continue;
}
new_password[j]=input[i];
j++;
i++;
}
printf("%s ",new_password);
}
return 0;
}
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| Output |
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