feat: finished create task

password/password.go

@@ -2,17 +2,69 @@ package password
 
 import (
 	"fmt"
+	"regexp"
+	"strings"
 )
 
 // Check checks if password is valid, and returns message, and if its a strong password
 func Check(input string, wordList, passwordList []string) (string, error) {
+	// Variables to check state of password
+	hasCapitalLetter := false
+	hasSpecialCharacter := false
+	isTwelveCharacters := false
+	hasNumber := false
+
 	// Check if password is shorter than 8 characters
-	if len(input) < 8 {
-		return "Weak password", fmt.Errorf("password cannot be shorter than 8 characters")
+	if len(input) < 2 {
+		return "Weak password", fmt.Errorf("password cannot be shorter than 12 characters")
+	} else {
+		isTwelveCharacters = true
 	}
 
-	// Check if password contains a number and a special character
+	// Check if password contains a number and a special character and a capital letter
 	for _, letter := range input {
+		// Check ASCII code to see if has special character
+		if letter >= 33 && letter <= 47 || letter >= 58 && letter <= 62 {
+			hasSpecialCharacter = true
+		}
 
+		// Check ASCII code to see if password contains a number
+		if letter >= 48 && letter <= 57 {
+			hasNumber = true
+		}
+
+		// Check ASCII code to see if password contains a capital letter
+		if letter >= 65 && letter <= 90 {
+			hasCapitalLetter = true
+		}
+
+		// Check ASCII code to see if there is a space
+		if letter == 32 {
+			return "Weak password", fmt.Errorf("password cannot contain a space")
+		}
 	}
+
+	// Check if password is in common passwords
+	for _, entry := range passwordList {
+		if strings.Contains(entry, input) {
+			return "Weak password", fmt.Errorf("password found inside common passwords")
+		}
+	}
+
+	// Check if password contains any common words
+	re, _ := regexp.Compile(`[^a-zA-Z]+`) // Use regex to match anything thats not a letter
+	// Replace all nonletter characters with blank space
+	strippedPassword := re.ReplaceAllString(input, "")
+	// Iterate through common words and see if input contains any
+	for _, word := range wordList {
+		if strings.Contains(word, strippedPassword) {
+			return "Weak password", fmt.Errorf("password contains common word from wordlist")
+		}
+	}
+
+	if !(hasNumber && hasSpecialCharacter && isTwelveCharacters && hasCapitalLetter) {
+		return "Weak password", nil
+	}
+
+	return "Strong password", nil
 }