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| 1 | +#!/usr/bin/env python |
| 2 | +import re |
| 3 | +import sys |
| 4 | +import random |
| 5 | +from getpass import getpass |
| 6 | + |
| 7 | +# ANSI escape codes for colors |
| 8 | +COLOR = { |
| 9 | + "RED": '\033[91m', |
| 10 | + "YELLOW": '\033[93m', |
| 11 | + "GREEN": '\033[92m', |
| 12 | + "BLUE": '\033[94m', |
| 13 | + "RESET": '\033[0m' |
| 14 | +} |
| 15 | + |
| 16 | +KEYBOARD_PATTERNS = ['qwerty', 'asdfgh', 'zxcvbn'] |
| 17 | +COMMON_SUBSTITUTIONS = { |
| 18 | + '@': 'a', '4': 'a', '3': 'e', '0': 'o', |
| 19 | + '1': 'i', '$': 's', '7': 't' |
| 20 | +} |
| 21 | + |
| 22 | +COMMON_WORDS = { |
| 23 | + 'adjectives': ['Happy', 'Clever', 'Swift', 'Brave', 'Bright'], |
| 24 | + 'nouns': ['Tiger', 'River', 'Mountain', 'Storm', 'Star'], |
| 25 | + 'numbers': ['365', '42', '777', '314', '999'], |
| 26 | + 'separators': ['_', '.', '#', '*', '@'] |
| 27 | +} |
| 28 | + |
| 29 | +PATTERNS = { |
| 30 | + 'uppercase': re.compile(r'[A-Z]'), |
| 31 | + 'lowercase': re.compile(r'[a-z]'), |
| 32 | + 'numbers': re.compile(r'\d'), |
| 33 | + 'special': re.compile(r'[!@#$%^&*(),.?":{}|<>]') |
| 34 | +} |
| 35 | + |
| 36 | + |
| 37 | +def format_to_header( |
| 38 | + msg: str, |
| 39 | + *, |
| 40 | + rep: float = 1, |
| 41 | + new_line_at_end: bool = False, |
| 42 | + is_main_header: bool = False): |
| 43 | + if not isinstance(msg, str): |
| 44 | + raise TypeError("msg must be a string") |
| 45 | + |
| 46 | + res_str = "\n" |
| 47 | + no_of_hypens = int(len(msg)*rep) |
| 48 | + |
| 49 | + if is_main_header: |
| 50 | + no_of_hypens += 4 |
| 51 | + msg = f"| {msg.upper()} |" |
| 52 | + |
| 53 | + header_str = [ |
| 54 | + '-'*no_of_hypens, |
| 55 | + msg, |
| 56 | + '-'*no_of_hypens, |
| 57 | + ] |
| 58 | + |
| 59 | + res_str += "\n".join(header_str) |
| 60 | + if new_line_at_end: |
| 61 | + res_str += "\n" |
| 62 | + return res_str |
| 63 | + |
| 64 | + |
| 65 | +def check_password_strength(password): |
| 66 | + score = 0 |
| 67 | + suggestions = [] |
| 68 | + |
| 69 | + # Check length |
| 70 | + if len(password) < 12: |
| 71 | + suggestions.append("Password should be at least 12 characters long.") |
| 72 | + elif len(password) >= 16: |
| 73 | + score += 2 |
| 74 | + else: |
| 75 | + score += 1 |
| 76 | + |
| 77 | + # Check for uppercase |
| 78 | + if not PATTERNS['uppercase'].search(password): |
| 79 | + suggestions.append("Add uppercase letters.") |
| 80 | + else: |
| 81 | + score += 1 |
| 82 | + |
| 83 | + # Check for lowercase |
| 84 | + if not PATTERNS['lowercase'].search(password): |
| 85 | + suggestions.append("Add lowercase letters.") |
| 86 | + else: |
| 87 | + score += 1 |
| 88 | + |
| 89 | + # Check for numbers |
| 90 | + if not PATTERNS['numbers'].search(password): |
| 91 | + suggestions.append("Add numbers.") |
| 92 | + else: |
| 93 | + score += 1 |
| 94 | + |
| 95 | + # Check for special characters |
| 96 | + if not PATTERNS['special'].search(password): |
| 97 | + suggestions.append("Add special characters.") |
| 98 | + else: |
| 99 | + score += 1 |
| 100 | + |
| 101 | + # Check for repeated patterns (like 'testtest') |
| 102 | + half_length = len(password) // 2 |
| 103 | + for i in range(2, half_length + 1): |
| 104 | + if password[:i] * (len(password) // i) == password[:len(password) // i * i]: |
| 105 | + suggestions.append("Avoid repeating patterns in your password.") |
| 106 | + score -= 1 |
| 107 | + break |
| 108 | + |
| 109 | + # Check for keyboard patterns |
| 110 | + lower_pass = password.lower() |
| 111 | + for pattern in KEYBOARD_PATTERNS: |
| 112 | + if pattern in lower_pass: |
| 113 | + suggestions.append("Avoid common keyboard patterns") |
| 114 | + score -= 1 |
| 115 | + break |
| 116 | + |
| 117 | + # Check for simple character substitutions |
| 118 | + substituted = password.lower() |
| 119 | + for k, v in COMMON_SUBSTITUTIONS.items(): |
| 120 | + substituted = substituted.replace(k, v) |
| 121 | + if substituted.isalpha() and len(substituted) > 3: |
| 122 | + suggestions.append( |
| 123 | + "Using symbol substitutions (like '@' for 'a') isn't very secure.") |
| 124 | + score -= 1 |
| 125 | + |
| 126 | + # Ensure score doesn't go below 0 |
| 127 | + score = max(0, score) |
| 128 | + |
| 129 | + return score, suggestions |
| 130 | + |
| 131 | + |
| 132 | +def categorize_password(score): |
| 133 | + if score < 2: |
| 134 | + return "WEAK", COLOR["RED"] |
| 135 | + if score < 4: |
| 136 | + return "GOOD", COLOR["YELLOW"] |
| 137 | + return "STRONG", COLOR["GREEN"] |
| 138 | + |
| 139 | + |
| 140 | +def create_memorable_suggestion(base_word): |
| 141 | + adj = random.choice(COMMON_WORDS['adjectives']) |
| 142 | + noun = random.choice(COMMON_WORDS['nouns']) |
| 143 | + num = random.choice(COMMON_WORDS['numbers']) |
| 144 | + sep = random.choice(COMMON_WORDS['separators']) |
| 145 | + |
| 146 | + # Use the base word if it's good enough (not too short and has letters) |
| 147 | + if len(base_word) >= 4 and any(c.isalpha() for c in base_word): |
| 148 | + base = base_word.capitalize() |
| 149 | + else: |
| 150 | + base = noun |
| 151 | + |
| 152 | + patterns = [ |
| 153 | + f"{adj}{sep}{base}{num}", |
| 154 | + f"{base}{sep}{noun}{num}", |
| 155 | + f"{num}{sep}{adj}{base}" |
| 156 | + ] |
| 157 | + |
| 158 | + return random.choice(patterns) |
| 159 | + |
| 160 | + |
| 161 | +def suggest_better_password(password): |
| 162 | + # If password is very weak, create a completely new memorable one |
| 163 | + score, _ = check_password_strength(password) |
| 164 | + if score < 2: |
| 165 | + return create_memorable_suggestion(password) |
| 166 | + |
| 167 | + suggestion = password |
| 168 | + |
| 169 | + # Smart character substitutions (maintain readability) |
| 170 | + smart_subs = { |
| 171 | + 'a': '@', 'e': '3', 'i': '!', 'o': '0', 's': '$', |
| 172 | + 'ate': '8', 'to': '2', 'for': '4' |
| 173 | + } |
| 174 | + |
| 175 | + # Apply substitutions intelligently |
| 176 | + for word, replacement in smart_subs.items(): |
| 177 | + if word in suggestion.lower() and random.random() < 0.5: # 50% chance |
| 178 | + suggestion = suggestion.replace(word, replacement) |
| 179 | + |
| 180 | + # Ensure at least one capital letter in a natural position |
| 181 | + if not any(c.isupper() for c in suggestion): |
| 182 | + words = suggestion.split() |
| 183 | + if words: |
| 184 | + words[0] = words[0].capitalize() |
| 185 | + suggestion = ''.join(words) |
| 186 | + |
| 187 | + # Add complexity if needed while keeping it memorable |
| 188 | + if len(suggestion) < 12: |
| 189 | + suggestion += random.choice(COMMON_WORDS['numbers']) |
| 190 | + |
| 191 | + if not re.search(r'[!@#$%^&*(),.?":{}|<>]', suggestion): |
| 192 | + suggestion += random.choice(COMMON_WORDS['separators']) |
| 193 | + |
| 194 | + return suggestion |
| 195 | + |
| 196 | + |
| 197 | +def input_handler(): |
| 198 | + if len(sys.argv) > 1: |
| 199 | + password = sys.argv[1] |
| 200 | + print( |
| 201 | + f"{COLOR['RED']}It is recommended to avoid entering passwords directly on the command line,{COLOR['RESET']}") |
| 202 | + print( |
| 203 | + f"{COLOR['RED']}as they may be visible to others and recorded in the shell history.{COLOR['RESET']}") |
| 204 | + return password |
| 205 | + print( |
| 206 | + format_to_header( |
| 207 | + "Password Strength Checker", |
| 208 | + new_line_at_end=True, |
| 209 | + is_main_header=True |
| 210 | + ) |
| 211 | + ) |
| 212 | + print("For enhanced security, your input will be hidden.") |
| 213 | + print("Hence, you may not see the characters as you type.") |
| 214 | + try: |
| 215 | + password = getpass("\nEnter password to check: ") |
| 216 | + except KeyboardInterrupt: |
| 217 | + print("\nExiting...") |
| 218 | + sys.exit(0) |
| 219 | + return password |
| 220 | + |
| 221 | + |
| 222 | +def output_handler(password, category, color, suggestions): |
| 223 | + print(f"\nPassword Strength: {color}{category}{COLOR['RESET']}") |
| 224 | + |
| 225 | + if suggestions: |
| 226 | + print(format_to_header("Suggestions to improve:")) |
| 227 | + for suggestion in suggestions: |
| 228 | + print(f"{COLOR['BLUE']}- {suggestion}{COLOR['RESET']}") |
| 229 | + |
| 230 | + # Add this block to show suggested password |
| 231 | + if category != "STRONG": |
| 232 | + better_password = suggest_better_password(password) |
| 233 | + print( |
| 234 | + f"\nSuggested stronger password: {COLOR['GREEN']}{better_password}{COLOR['RESET']}") |
| 235 | + |
| 236 | + points_to_remember = [ |
| 237 | + "Never use your personal information while creating a password.", |
| 238 | + "Consider using a passphrase made up of multiple words for better security.", |
| 239 | + "Avoid using common phrases or easily guessable patterns.", |
| 240 | + "Avoid using the same password for multiple accounts.", |
| 241 | + "Regularly update your passwords to enhance security.", |
| 242 | + "Use a reputable password manager to generate and store complex passwords securely." |
| 243 | + ] |
| 244 | + print(format_to_header('Points to Remember:')) |
| 245 | + for points in points_to_remember: |
| 246 | + print(f"{COLOR['BLUE']}- {points}{COLOR['RESET']}") |
| 247 | + |
| 248 | + |
| 249 | +def main(): |
| 250 | + password = input_handler() |
| 251 | + score, suggestions = check_password_strength(password) |
| 252 | + category, color = categorize_password(score) |
| 253 | + output_handler(password, category, color, suggestions) |
| 254 | + |
| 255 | + |
| 256 | +if __name__ == "__main__": |
| 257 | + main() |
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