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Python实现的密码强度检测器示例

更新时间:2020-05-06 05:06:01 作者:startmvc
本文实例讲述了Python实现的密码强度检测器。分享给大家供大家参考,具体如下:密码强度

本文实例讲述了Python实现的密码强度检测器。分享给大家供大家参考,具体如下:

密码强度

密码强度如何量化呢?

一个密码可以有以下几种类型:长度、大写字母、小写字母、数字以及特殊符号。

显然,密码包含的特征越多、长度越长,其强度也就越高。

我们设置几个等级来评测密码强度,分别是:terrible, simple, medium, strong

不同的应用可能对密码强度的要求不一样,我们引入最小程度(min_length)和最小特征数(min_types),作为可配置选项。

这样我们就可以检测密码包含的特征,特征与密码之间的关系可以简单定义为:

特征数 强度
小于最小长度 terrible
常用密码或规则的密码 simple
小于最小特征数 medium
大于或等于最小特征数 strong

另:常用的1万个密码点击此处本站下载

代码实现

check.py


# coding: utf-8
"""
check
Check if your password safe
"""
import re
# 特征
NUMBER = re.compile(r'[0-9]')
LOWER_CASE = re.compile(r'[a-z]')
UPPER_CASE = re.compile(r'[A-Z]')
OTHERS = re.compile(r'[^0-9A-Za-z]')
def load_common_password():
 words = []
 with open("10k_most_common.txt", "r") as f:
 for word in f:
 words.append(word.strip())
 return words
COMMON_WORDS = load_common_password()
# 管理密码强度的类
class Strength(object):
 """
 密码强度三个属性:是否有效valid, 强度strength, 提示信息message
 """
 def __init__(self, valid, strength, message):
 self.valid = valid
 self.strength = strength
 self.message = message
 def __repr__(self):
 return self.strength
 def __str__(self):
 return self.message
 def __bool__(self):
 return self.valid
class Password(object):
 TERRIBLE = 0
 SIMPLE = 1
 MEDIUM = 2
 STRONG = 3
 @staticmethod
 def is_regular(input):
 regular = ''.join(['qwertyuiop', 'asdfghjkl', 'zxcvbnm'])
 return input in regular or input[::-1] in regular
 @staticmethod
 def is_by_step(input):
 delta = ord(input[1]) - ord(input[0])
 for i in range(2, len(input)):
 if ord(input[i]) - ord(input[i - 1]) != delta:
 return False
 return True
 @staticmethod
 def is_common(input):
 return input in COMMON_WORDS
 def __call__(self, input, min_length=6, min_type=3, level=STRONG):
 if len(input) < min_length:
 return Strength(False, "terrible", "密码太短了")
 if self.is_regular(input) or self.is_by_step(input):
 return Strength(False, "simple", "密码有规则")
 if self.is_common(input):
 return Strength(False, "simple", "密码很常见")
 types = 0
 if NUMBER.search(input):
 types += 1
 if LOWER_CASE.search(input):
 types += 1
 if UPPER_CASE.search(input):
 types += 1
 if OTHERS.search(input):
 types += 1
 if types < 2:
 return Strength(level <= self.SIMPLE, "simple", "密码太简单了")
 if types < min_type:
 return Strength(level <= self.MEDIUM, "medium", "密码还不够强")
 return Strength(True, "strong", "密码很强")
class Email(object):
 def __init__(self, email):
 self.email = email
 def is_valid_email(self):
 if re.match("^.+@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$", self.email):
 return True
 return False
 def get_email_type(self):
 types = ['qq', '163', 'gmail', '126', 'sina']
 email_type = re.search('@\w+', self.email).group()[1:]
 if email_type in types:
 return email_type
 return 'wrong email'
password = Password()

test_check.py: 用于单元测试


# coding: utf-8
"""
test for check
"""
import unittest
import check
class TestCheck(unittest.TestCase):
 def test_regular(self):
 rv = check.password("qwerty")
 self.assertTrue(repr(rv) == "simple")
 self.assertTrue('规则' in rv.message)
 def test_by_step(self):
 rv = check.password("abcdefg")
 self.assertTrue(repr(rv) == "simple")
 self.assertTrue('规则' in rv.message)
 def test_common(self):
 rv = check.password("password")
 self.assertTrue(repr(rv) == "simple")
 self.assertTrue('常见' in rv.message)
 def test_medium(self):
 rv = check.password("ahj01a")
 self.assertTrue(repr(rv) == 'medium')
 self.assertTrue('不够强' in rv.message)
 def test_strong(self):
 rv = check.password("asjka9AD")
 self.assertTrue(repr(rv) == 'strong')
 self.assertTrue('很强' in rv.message)
 # 测试邮箱
 def test_email(self):
 rv = check.Email("123@gmail.com")
 self.assertEqual(rv.is_valid_email(), True)
 def test_email_type(self):
 rv = check.Email("123@gmail.com")
 types = ['qq', '163', 'gmail', '126', 'sina']
 self.assertIn(rv.get_email_type(), types)
if __name__ == '__main__':
 unittest.main()

PS:这里再为大家提供两款相关在线工具供大家参考使用:

在线随机数字/字符串生成工具: http://tools.jb51.net/aideddesign/suijishu

高强度密码生成器: http://tools.jb51.net/password/CreateStrongPassword

Python 密码强度 检测器