root/source4/auth/

[..]
  1. auth.h
  2. auth_sam_reply.c
  3. credentials/
  4. gensec/
  5. kerberos/
  6. ntlm/
  7. ntlmssp/
  8. pyauth.c
  9. pyauth.h
  10. sam.c
  11. samba_server_gensec.c
  12. session.c
  13. session.h
  14. system_session.c
[..]