#include #include #include #include #include //PASSWORD GENERATOR & PASSWORD VALIDATOR int main() { srand(time(NULL)); int methodNumb, i; printf("Choose the password method you want to use:\n"); while(1) { //Choosing the password method printf("1: Random Generator | 2: Password Validator\n"); scanf("%d", &methodNumb); if(methodNumb == 1 || methodNumb == 2) { break; } else { ("Unvalid choice!\nChoose the method again:\n"); } } if(methodNumb == 1) { //random password generator by length int length; while(1) { //Asking for length printf("Enter the length for your password(Min 8, Max 32): \n"); scanf("%d", &length); if(length <= 32 && length >= 8) { break; } else { printf("unvalid length!\n"); } } int password[length]; for(i = 0; i < length; i++) { password[i] = rand() % 93 + 34; //generates a random number between 33 and 126 (33 & 126 included.) } printf("Generated password is: "); //Printing integers as chars. for(i = 0; i < length; i++) { printf("%c", password[i]); } } else if(methodNumb == 2) { //User defined, tells the strength (use string functions!) int strength = 0, i; char password[256]; printf("Enter a password including at least a lowercase letter, an uppercase letter and a number.\nMin 8, Max 32 characters.\n"); printf("Enter your new password: \n"); while(strength < 3) { while(strength < 3) { fflush(stdin); //Clear the input buffer after reading the character gets(password); //User Input if(strlen(password) > 32 || strlen(password) < 8) { printf("Invalid length!\nEnter your new password again(Min 8, Max 32 characters): \n"); }else { break; } } //looking for if a number exist. for(i = 0; i < strlen(password); i++) { if(isdigit(password[i])) { strength++; break; } } //looking for if a lowercase letter exist. for(i = 0; i < strlen(password); i++) { if(islower(password[i])) { strength++; break; } } //looking for if a uppercase letter exist. for(i = 0; i < strlen(password); i++) { if(isupper(password[i])) { strength++; break; } } if(strength >= 3) { printf("Nice one! Your password has been set!\n"); printf("Your new password is %s", password); }else { strength = 0; //reset strength variable password[0] = 0; //reset the string with null terminator printf("Your password is not strong enough!"); printf("Enter a password again: \n"); } } } return 0; }

Password Generator & Password Validator - 13.02.2019