我正在尝试创建一个系统,要求您输入密码。如果全部较低,较高或编号,则打印较弱;如果是两个条件,则将其显示为med,如果满足所有条件,则显示为较强。看来似乎行不通。
弱而强的作品,但媒介却没有。
我不知道哪里出了问题。
def password():
print ('enter password')
print ()
print ()
print ('the password must be at least 6, and no more than 12 characters long')
print ()
password = input ('type your password ....')
weak = 'weak'
med = 'medium'
strong = 'strong'
if len(password) >12:
print ('password is too long It must be between 6 and 12 characters')
elif len(password) <6:
print ('password is too short It must be between 6 and 12 characters')
elif len(password) >=6 and len(password) <= 12:
print ('password ok')
if password.lower()== password or password.upper()==password or password.isalnum()==password:
print ('password is', weak)
elif password.lower()== password and password.upper()==password or password.isalnum()==password:
print ('password is', med)
else:
password.lower()== password and password.upper()==password and password.isalnum()==password
print ('password is', strong)
afaik isalnum()返回一个布尔值,因此它永远不会等于密码
你好吗?
最好的方法是使用正则表达式搜索
这是我当前正在使用的功能
def password_check(password):
"""
Verify the strength of 'password'
Returns a dict indicating the wrong criteria
A password is considered strong if:
8 characters length or more
1 digit or more
1 symbol or more
1 uppercase letter or more
1 lowercase letter or more
"""
# calculating the length
length_error = len(password) < 8
# searching for digits
digit_error = re.search(r"\\d", password) is None
# searching for uppercase
uppercase_error = re.search(r"[A-Z]", password) is None
# searching for lowercase
lowercase_error = re.search(r"[a-z]", password) is None
# searching for symbols
symbol_error = re.search(r"[ !#$%&'()*+,-./[\\\\\\]^_`{|}~"+r'"]', password) is None
# overall result
password_ok = not ( length_error or digit_error or uppercase_error or lowercase_error or symbol_error )
return {
'password_ok' : password_ok,
'length_error' : length_error,
'digit_error' : digit_error,
'uppercase_error' : uppercase_error,
'lowercase_error' : lowercase_error,
'symbol_error' : symbol_error,
}
编辑:
以下是Lukasz的建议,它是对特殊符号条件验证的更新
symbol_error = re.search(r"\\W", password) is None
对于symbol_error是否有使用'\\\\ W * \\\\ s'的方法?列出符号似乎效率不高。例如,您提供的列表省略了?,以及许多其他内容。
感谢您的评论Lukasz。使用特殊序列\\\\ W可以简化符号搜索。不需要包含\\\\,因为\\\\ W中已经包含空格。因此,"搜索符号"的代码必须更改为:symbol_error = re.search(r" \\\\ W",password)为None
我喜欢这种方法。清晰,简单且可读性强。不确定是否要在密码中保留空格?尽管对此的意见似乎有所不同:security.stackexchange.com/questions/32691/…
至少前导和尾随空格应错误:o.whitespace_error = len(pwd.strip()) != len(pwd)
password.isalnum()返回一个布尔值,因此password.isalnum()==password始终为False。
只需省略==password部分:
if password.lower()== password or password.upper()==password or password.isalnum():
# ...
接下来,它永远不能同时是所有上限和下限,也不能全部是上限和下限,也不能全部是下限和所有数,因此第二个条件(中)是不可能的。也许您应该寻找一些大写,小写和数字的出现?
但是,首先要解决的另一个问题。您正在测试密码是否为字母数字,仅由字符和/或数字组成。如果只想测试数字,请使用.isdigit()。
您可能想熟悉字符串方法。您可以尝试使用方便的.islower()和.isupper()方法,例如:
>>> 'abc'.islower()
True
>>> 'abc123'.islower()
True
>>> 'Abc123'.islower()
False
>>> 'ABC'.isupper()
True
>>> 'ABC123'.isupper()
True
>>> 'Abc123'.isupper()
False
与使用password.upper() == password相比,这些命令更快且更详细,以下将对其进行测试:
if password.isupper() or password.islower() or password.isdigit():
# very weak indeed
您要学习的下一个技巧是遍历字符串,以便可以测试各个字符:
>>> [c.isdigit() for c in 'abc123']
[False, False, False, True, True, True]
如果将其与any()函数结合使用,则可以测试是否有一些数字字符:
>>> any(c.isdigit() for c in 'abc123')
True
>>> any(c.isdigit() for c in 'abc')
False
我认为您在测试密码强度时会发现这些技巧很方便。
这里是您写的内容的重拍:
import re
def password():
print ('Enter a password\
\
The password must be between 6 and 12 characters.\
')
while True:
password = input('Password: ... ')
if 6 <= len(password) < 12:
break
print ('The password must be between 6 and 12 characters.\
')
password_scores = {0:'Horrible', 1:'Weak', 2:'Medium', 3:'Strong'}
password_strength = dict.fromkeys(['has_upper', 'has_lower', 'has_num'], False)
if re.search(r'[A-Z]', password):
password_strength['has_upper'] = True
if re.search(r'[a-z]', password):
password_strength['has_lower'] = True
if re.search(r'[0-9]', password):
password_strength['has_num'] = True
score = len([b for b in password_strength.values() if b])
print ('Password is %s' % password_scores[score])
输出(样本):
>>> password()
Enter a password
The password must be between 6 and 12 characters.
Password: ... ghgG234
Password is Strong
将raw_input切换为input,您可以使用,如果使用python 2,也可以,反之亦然。(我已经编辑了答案,所以应该可以使用)
我也在寻找一些密码强度检查功能,并发现了很多半途而废的建议。我基于该函数组装了自己的函数。
希望能提供帮助
def get_pw_strength( pw ):
s_lc = set(['a', 'c', 'b', 'e', 'd', 'g', 'f', 'i', 'h', 'k', 'j', 'm', 'l', 'o', 'n', 'q', 'p', 's', 'r', 'u', 't', 'w', 'v', 'y', 'x', 'z'])
s_uc = set(['A', 'C', 'B', 'E', 'D', 'G', 'F', 'I', 'H', 'K', 'J', 'M', 'L', 'O', 'N', 'Q', 'P', 'S', 'R', 'U', 'T', 'W', 'V', 'Y', 'X', 'Z'])
s_dg = set(['1', '0', '3', '2', '5', '4', '7', '6', '9', '8'])
s_sp = set(['+', ',', '.', '-', '?', ':', '_', '(', ')', '*', '/', ';', '+', '!'])
pw_s = 0
pw_steps = (5, 8, 12)
pw_l = len(pw)
if ( pw_l < 4 ):
return 0
for l in pw_steps :
if ( pw_l > l ):
pw_s += 1
#print"length over", l," giving point", pw_s
c_lc = c_uc = c_dg = c_sp = 0
for c in pw :
if ( c in s_lc ) :
c_lc += 1
if ( c in s_uc ) :
c_uc += 1
if ( c in s_dg ) :
c_dg += 1
if ( c in s_sp ) :
c_sp += 1
if ( c_lc + c_uc + c_dg + c_sp <> pw_l ):
#print c_lc, c_uc, c_dg, c_sp, pw_l
#raise Exception"Forbidden chracter"
return -1
charset = 0
if ( c_lc ) :
pw_s += 1
charset = len(s_lc)
if ( c_uc ) :
pw_s += 1
charset = len(s_uc)
if ( c_dg ) :
pw_s += 1
charset = len(s_dg)
if ( c_sp ) :
pw_s += 2
charset = len(s_sp)
entropy = log(pow(charset,pw_l),2)
return pw_s, entropy