密码复杂性的正则表达式 [英] Regular expression for password complexity

问题描述

我正在尝试通过客户端 (JavaScript) 和服务器端 (ASP.NET C#) 上的正则表达式来实施密码复杂性.

I am trying to implement the enforcement of password complexity through regular expressions on both client (JavaScript) and server side (ASP.NET C#).

规则如下:

• 必须是 8-40 个字符
• 必须至少包含一位数字
• 必须至少包含一个小写字母
• 必须至少包含一个大写字母
• 必须至少包含一个特殊字符

您能帮忙构建验证上述内容所需的正则表达式吗?

Can you please help construct the regular expression needed to validate the above?

推荐答案

在这里试试这个正则表达式:

try this regex here:

((?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).{8,40})

(           # Start of group
  (?=.*\d)      #   must contains one digit from 0-9
  (?=.*[a-z])       #   must contains one lowercase characters
  (?=.*[A-Z])       #   must contains one uppercase characters
  (?=.*[@#$%])      #   must contains one special symbols in the list "@#$%"
              .     #     match anything with previous condition checking
                {8,40}  #        length at least 8 characters and maximum of 40 
)       

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