Regex for Password with repetitive pattern

I have a requirement for password with below requirements, out of which all fulfilled, except repeated words/patterns.

At least 1 digit
At least 1 upper case
At least 1 lower case
At least 1 special character
No repeating chars (AA not valid, 11 not valid)
No repeating words or pattern (ProPersonPro or xyzxyz) - Unable to implement (within same regex)

This is my Regex which fulfills everything but last (repeating pattern) requirement.

(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[.,!@#$%^+=_])(?!.*(.)\1).{8,20}$

Is there a way I can tackle it within above Regex?

Solution

Assuming your password should not match spaces, you can use \S to match non whitespace characters instead of using a dot.

^(?=[^\d\s]*\d)(?=[^\sa-z]*[a-z])(?=[^\sA-Z]*[A-Z])(?=[^\s.,!@#$%^+=_]*[.,!@#$%^+=_])(?!\S*(\S)\1)(?!\S*(\S{2})\S*\2)\S{8,20}$

The pattern matches:

^ Start of string
(?=[^\d\s]*\d) Assert a digit to the right using a negated character class to match optional non whitespace charaters excluding a digit first
(?=[^\sa-z]*[a-z]) Same mechanism for a char a-z
(?=[^\sA-Z]*[A-Z]) Same for a char A-Z
(?=[^\s.,!@#$%^+=_]*[.,!@#$%^+=_]) As well as for a character that you consider special
(?!\S*(\S)\1) Assert that there is no occurrence of 2 consecutive same non whitespace characters to the right
(?!\S*(\S{2})\S*\2) Assert that there is no sequence of 2 of the same non whitespace characters (separated by optional non whitespace characters in between) to the right
\S{8,20}
$ End of string