ChangeLog

1.4.0-1
Dave Olson, June 2016

Changes to support local mapping, so that TACACS users do not need
entries in /etc/passwd to supply home directory, uid, and gid information.

This was done by using a new mapping library libtacplus_map.  See that
package for details.

Also see the comments about immutable loginuid in Pam.d.common-example

libtac is converted to a shared library, so it can be used by other programs,
and only functions and variables starting with tac_* are exported in the
shared library.  Some functions were renamed to make this possible.

A separate package libnss_tacplus uses the mapping library to do lookups by
both name and uid.  uid lookups are only possible while a tacacs user is
logged in.

If multiple tacacs users at the same privilege level are logged in, the
current behavior is that is that if a call is done from within the login
session, the correct (login) name will be returned.   If from outside the
session (audit uid and/or session don't match in the mapping file), the name
from first map entry is used, much like normal systems where multiple users
have the same UID.

Added the runtime config capability to include another file, so that
the tacacs servers are only listed in a single place.  Ship using
/etc/tacplus_servers as an include file, and use it in the pam sample config
Because that's common, allow debug=NUMBER for pam_tacplus, as well as plain
"debug".

Renamed external libtac functions to all have a tac_ prefix, to avoid
name collision with other programs (the x*alloc family was an issue, in
particular).   This is an API change, but since library just got bumped from
1.0 to 2.0, left it at 2.0

Enabled -Werror to catch errors early (and fixed a few related items).

1.4.0
* Use openssl by default for crypto

1.3.9
* Close file descriptor leak
* Add client_connect_source_address

1.3.8
* A lot of cleanups and improvements by Walter de Jong <walter@heiho.net>
* Fixed build instruction in spec file and INSTALL
* Active_server can not be a pointer, data lost after authentication.
* Added port option per server, thanks to Luc Ducazu <lducazu@gmail.com>
* Fixed missing FIONREAD for solaris
* Rearranged header file include for libtac.h, fixes AIX compile problems
* Renamed rem_addr, rem_addr_len to r_addr and r_addr_len

1.3.7
* Tac_encryption fully handled by libtac no need to enable it manually
* Fixed connection handling in _pam_account,
  thanks to James Allwright <jamesallwright@yahoo.co.uk>
* Handle attributes which contains no value,
  thanks to James Allwright <jamesallwright@yahoo.co.uk>
* Global variables tac_login and tac_secret not static anymore,
  pointed out by James Allwright <jamesallwright@yahoo.co.uk>
* version.c: libtac version 1.8.1
* pam_tacplus.c: moved debug message after active_server validation, avoiding
  null pointer exception
* attrib.c: explicity setting *attr to NULL after free(),
  thanks to Anthony Low <anthonyl@xkl.com>

1.3.6
* Added libpam-runtime support for debian
* Added use_first_pass and try_first_pass option, thanks to Luc Ducazu <lducazu@gmail.com>
* Changed e-mail adres to jeroen@jeroennijhof.nl
* Improved accounting, added cmd attribute for command logging
* Added tac_acct_flag2str()
* Renamed tac_account_read, tac_account_send to tac_acct_read and tac_acct_send
* pam_tacplus.spec.in: fixed static library path and pam_tacplus.so location
* Debian packaging improvements

1.3.5
* This version will be dedicated to Darren Besler, thank you for your major
  contribution!

* libtac version is now 1.7.1
* magic.c: magic_inited is only used for linux
* Finally got rid of all goto illness!
* Changed tabsize to 4
* Fixed missing xalloc.h in authen_s.c
* Get PAM_RHOST from PAM stack and use it as rem_addr
* Added _pam_get_rhost() and _pam_get_user()

* The following is done by Darren Besler:
- add ability to set more elements of tacacs+ packet from parameters or globals
- cleanup messaging to be consistent with function and presentation format
- cleanup how strings are handled and returned
- acct and author read require areply.msg to be freed by caller now
- cast return values
- added port # to formatted IP address
- add timeout on read capability
- cleanup method messages are returned to caller, including adding a 0 byte
  0 byte added for safety reasons
- caller must free areply.msg now.
- add rem_addr as an argument
- include rem_addr in packet
- include ability to set priv_lvl in packet
- add ability to set authen_service from global variable aot fixed value

Bugs fixed by Darren Besler:
- cleanup various memory leaks, lost memory, and dangling pointers
- attrib.c: wasn't preserving '*' separator in attrib.c
- author_r.c:
- free attributes for replace status. Was always adding.
- uncasted char* for length was producing negative length to bcopy for arg len > 127
- possible null dereference when no separator
- cont_s.c
- was creating a new session id, should be using session id from authen start.
- magic.c
- magic was returning 0 on first call. Wasn't being initialized properly.

Other changes by Darren Besler:
* libtac/include/cdefs.h
- add #ifndef guards

* libtac/include/libtac.h
- rename #ifndef guard to match filename
- add extern "C" for C++
- alter define for TACDEBUG
- add define for TACSYSLOG
- alter macro for TACDEBUG to be able to be used at runtime via tac_debug_enable
- add declarations from tacplus.h not related to protocol
- add defines for return status codes for library functions
- add declarations for new additional global variables
tac_priv_lvl
tac_authen_method
tac_authen_service
tac_debug_enable
tac_readtimeout_enable
- revise declarations for functions to that have altered parameters lists, or return value

* libtac/include/tacplus.h
- move library specific declarations to libtac.h, leaving declarations
here to be used for protocol specific details
- add additional declarations for more complete coverage of tacacs+ protocol (v1.78)

1.3.4
* removed encrypt option just check if there is a secret (key).
* removed first_hit option because you can get the same behaviour by using only one server.
* added multiple secret support,
  you can now specify different secrets (keys) for different servers.
* connect.c: improved connection error handling by using getpeername() to check if connection
  is still valid. This was needed since we are using non-blocking sockets.
* properly handle multiple servers when authenticating, patch from Gregg Nemas, thanks!

1.3.3
* pam_tacplus.h: changed bitflags to hex, thanks Jason!
* Added gitignore for build stuff
* connect.c: removed ifdef for sys/socket.h, it will be included anyway for other platforms,
  thanks to Obata Akio for pointing that out.
* connect.c: improved connection error handling, patch from Martin Volf, thanks!

1.3.2
* Added autotool configuration files, thanks to Benoit Donneaux <benoit.donneaux@gmail.com>.
* Added pam_tacplus.spec file, thanks to Benoit Donneaux <benoit.donneaux@gmail.com>.
* Added license information to all files and the license itself.
* All AV pairs are now available to the PAM environment. So you can use pam_exec.so or whatever
  to do something with these. Only available for PAM account.
* Rewritten attribute loop in function pam_sm_acct_mgmt() for debug and future use
  of AV pairs.
* Fixed attribute buffer in author_r.c, this bug cause program stuck when you get
  AV pairs from the server, reported by Oz Shitrit.

1.3.1
* Added custom password prompt option
* Removed password logging when in debug mode

1.3.0
* Released version 1.3.0 based on 1.2.13.
  This release finally includes support for TACACS+ chap and login authentication. The
  default is still pap for backward compatibility.

1.2.13
* Changed spaces into tabs for pam_tacplus.c so make it more readable
* Did some minor cleanup
* Added login option so you can choose which TACACS+ authentication you want to
  use. You can use pap, chap or login (ascii) at the moment. The default login option is pap.
* Added cont_s.c needed for TACACS+ login authentication.

1.2.12
* Missing network byte order convertion to host byte order in function's
  tac_account_read, tac_authen_pap_read and tac_author_read, reported and
  patch by Sven van den Steene, thanks!
* Fixed potential memory leak, when tac_account_read and tac_authen_pap_read are
  successful msg isn't freed, reported by Sven van den Steene

1.2.11
* Added NO_STATIC_MODULES to CFLAGS for linking with openpam on netbsd, tested by
  Fredrik Pettai <pettai@nordu.net>
* Removed libdl for compiling causing failure on netbsd, reported by
  Fredrik Pettai <pettai@nordu.net>
* hdr_check.c: forgot to include stdlib, reported by
  Fredrik Pettai <pettai@nordu.net>
* Changed defines to add support for netbsd, fixed by
  Jeroen Nijhof <jeroen@nijhofnet.nl>
* magic.c: read() can have a return value, fixed by
  Jeroen Nijhof <jeroen@nijhofnet.nl>
* support.c: _pam_log() va_list converted to string with vsnprintf() to support
  syslog(), we have human readable error's in syslog again, fixed by
  Jeroen Nijhof <jeroen@nijhofnet.nl>

1.2.10
  The following changes where made by Jeroen Nijhof <jeroen@nijhofnet.nl>
* Changed default compile flags to be more compatible
* Fixed serveral bugs including casts and cleanup's, the code can now compile
  without any warnings
* Changed some Makefile definitions to be more compatible with other versions of make
* Support added for solaris and aix, tested on aix 5.3, solaris 9 and 10. Including
  standalone version of cdefs.h

1.2.9
* Fixed bug with passing username and password, reported by
  Mark Volpe <volpe.mark@epamail.epa.gov>
* Fixed bug in passing the remote address, reported by
  Jason Lambert <jlambert@lambert-comm.net> and
  Yury Trembach <yt@sns.net.ua>
* Fixed bug in reception of authorization packet, reported by
  <svg@disney.surnet.ru>

1.2.8
* Another bugfix in tty handling - some daemons don't use any terminal, in
  which case we send "unknown" terminal name to the TACACS+ server

1.2.7
* Fixed bug in tty determination

1.2.6
* Better protection against disconnection signals

1.2.5
* Fixed bug in task_id initialisation

1.2.4
* Fixed small bug in accounting

1.2.3
* upgraded to new libtac version, now pam_tacplus returns the attributes
  received from server (currently only 'addr' attribute in PAM_RHOST)
* minor fixes

1.2.2
* more fixes

1.2.1
* pam_sm_acct_mgmt() added
* pam_sm_open_session() added
* pam_sm_close_session() added
* minor fixes

1.0.1
* first working version with pam_sm_authenticate()