How to Enable 1FA Passwordless (local users)

Steps For Configuring AuthNull PAM Authenticator (Password Login) for Passwordless Authentication

1. Login into any VM , check out the pam.so file and did.sh script from the github link given below:

   Github Link

For Password authentication,

Centos Based :

2. Please add the below lines at the end of the file in /etc/pam.d/su

   auth required /usr/local/lib/security/pam_authenticator.so debug nullok auth required pam_permit.so

Comment below

#auth sufficient pam_rootok.so

#auth sufficient pam_wheel.so trust use_uid

#auth required pam_wheel.so use_uid #auth substack system-auth #auth include postlogin

#account required pam_unix.so

#session include system-auth #session include postlogin

b. Ubuntu Based

Please add the below lines at the end of the file in /etc/pam.d/common-auth

auth required /usr/local/lib/security/pam_authenticator.so debug nullok auth required pam_permit.so

Comment below

3. Please try su to any local user

   su username

This will intiate the passwordless login

Please check the logs from /var/log/auth.log file (for ubuntu based) , and /var/log/secure (centos based)