密码复杂度的正则表达式

Question

我正试图通过客户端(JavaScript)和服务器端(ASP. js)的正则表达式实现密码复杂性的强制执行。净c#) .

规则如下:

• 必须是8-40个字符
• 必须包含至少一个数字
• 必须包含至少一个小写字母
• 必须包含至少一个大写字母
• 必须包含至少一个特殊字符

你能帮助构造验证上面的正则表达式吗?

Answer 1

试试这个正则表达式:

((?=.*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 
)