Changes from Release 0.0 to release 0.1 --------------------------------------- You must now say "default attribute = permit" instead of default authorization = permit" when configuring service defaults You must now say "default svc = permit" instead of "default authorization = permit" when configuring service defaults for a user. When authorizing enable requests, the daemon used to prompt for a username which it then ignored. It no longer prompts for a username. Fix recursion issues with service and command lookups. They are now fully recursive c.f. password lookups. Add debugging output to password verification to provide information about expiry processing. Keep track of longest hash chain we create, for fine tuning. Hash all keywords into a keyword table instead of doing linear lookup. Update users_guide to reflect the new configuration syntax. The convert.pl script now generates the new configuration file syntax. Accounting code now honours the "more" flag. Changes from Release 0.1 to release 0.2 --------------------------------------- You can now send a SIGHUP to the daemon to cause it to reinitialize itself and re-read its CONFIG file. There is a new debugging flag devoted to this section of the code. Node types are now pretty-printed in debug output. The conversion script "convert.pl" now will not print out an expires field if it doesn't think the syntax of the field is correct. It also now ignores blank lines in its input files. When doing authorization, the NAS supplied attribute "cmd=" is now correctly ignored. This would previously have caused exec authorization to be denied. Changes from Release 0.2 to release 0.3 --------------------------------------- Warn when not invoked as uid 0. Improved Usage message Add make install target Changes from Release 0.3 to release 0.4 --------------------------------------- Add TAC_PLUS_PIDFILE to makefile per Andy Linton's suggestion. Fix bug in authorization code (protocol field needs to be uppercase) which prevented authorization from working. Changes from Release 0.4 to release 0.5 --------------------------------------- Add pre and post authorization calls to shell commands. Minor bugfixes and code cleanup The "More" bit in accounting records is now honoured. Fix a bug in convert.pl Redo accounting output routines. You can now name the accounting file in the configuration file. Change "svc" to "service" and "proto" to "protocol". You can use any string to name a ppp protocol, even one which doesn't yet exist. Add PPP/LCP special case processing Revised authorization algorithm (see user's guide) Add hex debug flag to allow skipping hex in packet dumps. Update user's guide to reflect changes Changes from Release 0.4 to release 1.0 --------------------------------------- Changed format of syslog messages to make writing scripts easier Added ability to use cleartext passwords instead of DES passwords Updated man page to reflect the fact that we use SIGUSR1 to re-read the config file. SIGHUP is now ignored. Updated the users guide. Changes from Release 1.0 to release 1.1 --------------------------------------- Release 1.1 corresponds to RCS version 1.64 of tac_plus (see tac_plus -v) A typo in the Solaris section of the Makefile has been fixed. The keyword 'des' has been introduced which must be used before all des encrypted passwords. The keyword 'password' has been changed to 'login', so password = f23sac783n has become login = des f23sac783n The convert.pl script knows about these changes. arap and chap now require the keyword 'cleartext' in front of their passwords. A cleartext, per-user, global password can now be configured, which works for login, arap and chap. The users_guide has been updated to include a list of all A/V pairs recognised by IOS 10.3(3) code. Some solaris binaries have been provided as a courtesy. Changes from Release 1.1 to release 2.0 --------------------------------------- generate_password.pl has been removed in favour of a C program generate_passwd.c The version number reported by tac_plus has been changed to agree with the release number. This is why the version has jumped to 2.0 skey was broken by changes made in 1.1. These are now fixed. Documentation has been added for the authorization AV pairs supported by IOS releases 10.3(3) and 11.0. Changes from Release 2.0 to release 2.1 --------------------------------------- There are now Makefile definitions for most of the major platforms. Minor changes to remove some spurious debugging output. A prematurely closed NAS connection will now call the authentication function with the abort flag set, so that it can do any clean up it requires. syslog messages will contain the string "unknown" for usernames and ports which are NULL, so that the messages always contain a fixed number of fields. The authentication code has been rearranged to better reflect the structure of the API. The "default user = permit" directive is still accepted but is now deprecated in favour of "default authorization = permit". A bug in the handling of substring AV pairs which caused the attribute "addr" to erroneously match "addr-pool" has been fixed. Added new files: enable.c generate_passwd.c skey_fn.c New #defines have been added to make it easier to port tacacs+ to new systems. Many more iterations are allowed before an error is declared. Changes from Release 2.1 to release 2.2 --------------------------------------- The expiry field in the shadow file on Solaris machines is now honored, if it exists. Added TAC_PLUS_AUTHEN_SVC_NASI Changes from Release 2.2 to release F3.0.13 ------------------------------------------- NEW REVISION OF THE PROTOCOL corresponding to tacacs+.spec.v1.63.ps (which see) to increase security in the case of compromised keys. Inbound pap logins and outbound pap password are now configurable as separate entries for each principal. Inbound pap logins are now declared by using a "pap = " configuration directive. Outbound PAP is now configured using "opap =". Substantial code rearrangement of authentication routines. Cleartext passwords can be up to 255 characters in length (previously only the first 8 characters were used). default service = permit is now fully recursive and now allows you to say default service = deny in case you belong to a group where the default is to permit. Include backward compatibility with old revision of the protocol (prior to v1.63). post_authorization scripts are now invoked for command authorization. Better sanity checking of authorization and accounting packets. The API has changed slightly. All character string fields in the identity structure are now allocated from the heap and can be up to 255 bytes long (instead of being character arrays of 32 and 64 bytes, as specified in the API document revision 1.30 or earlier). Double quotes can now appear inside strings if they are escaped with a backslash. Added code which limits the number of simultaneous sessions a user can have (see MAXSESS in the user's guide). The accounting "more" bit is gone (It was deprecated from the spec). Hooks are now in so that if you have DES code, you can do ARAP more securely, per the new protocol. The packet read/write routines now handle exceptions more gracefully. Lots of stuff added to the user's guide. If you use a port number other than the default, the pidfile has the port number appended to it, in case you are running multiple daemons. We also now remove the pidfile when the daemon terminates via SIGTERM. user = DEFAULT has been added, deprecating "default authorization = permit". See the user's guide. Arbitrary service types can now be configured in the config file. REARMSIGNAL has been added for those systems which install one-shot signal handlers which need to be rearmed after use (LINUX, HPUX). A \n can now be embedded within strings. Concede defeat. Allow SIGHUP as synonym for SIGUSR1. Avoid symbol buffer overflow by checking the maximum length of a string or token. Make peer DNS lookup on incoming connections optional. Do not close socket when servicing a SIGHUP Fix a bad bug where service/cmd declarations which were not contiguous were parsed but ignored (reported by Gabor Kiss). Patch maxsessions to not count the current port on a different NAS. Add various other fixes to maxsession code. Add timeout to finger read routine. Changes from release F3.0.13 to F4.0.1 ------------------------------------------- Added MSCHAP routines CSCdi37706 exposed a bug in command authorization on the daemon. Change assemble_args so it returns "" if there are no command arguments. Changes from release F4.0.1 to F4.0.2 ------------------------------------------- Fix fseek problem in maxsess code Changes from release F4.0.2 to F4.0.3 ------------------------------------------- Add option for wtmp file logging in accounting Added -DGLIBC for Linux. Support PAP with des encrypted passwords Support a return code of 3 for external authorization scripts Changes from release F4.0.3 to F4.0.4 ------------------------------------------- merge F4.0.4 changes from disaster.com F4.0.4.1 - {log,pid}file permissions fixes - partically from ian freislich - add bind address (-B) option - partically from ian freislich - fix pidfile removal on exit F4.0.4.2 - partial autoconf setup - much more to be done - compile option IGN_HUP (ignore HUP signal) is history - rename generated_password -> tac_pwd and add manpage - rename tac_plus.1 -> tac_plus.8 - add tac_plus.confg.5 - add -h option to display usage info F4.0.4.3 - comment out the unnecessary lex and yacc tests from autoconf F4.0.4.4 - added more autoconf stuff - fix-up tac_plus.8 manpage - still need to do autoconf-time option replacement - fix-up tac_plus.conf manpage - incomplete - fix-up tac_plus help message - whitespace and formatting nits - port host clause (minus type keyword) from devrim seral's tac_plus v9 (http://www.gazi.edu.tr/tacacs/) at user request - changed user-specific enable password handling such that it if one is specified for the user, the daemon does not check the host-specific or global enable password. - make TACPLUS_ACCTFILE, TACPLUS_PIDFILE, and TACPLUS_LOGFILE autoconf knobs filling in pathsl.h and appopriate bits in manpages - separated the frequently asked questions portion of the user_guide into the file FAQ - OR successive -d (debug) options - fix md5 for LP64 F4.0.4.5 - use C99 stdint.h for int types - linux's libwrap needs libnsl - variable index in md5.c conflicts with index() F4.0.4.6 - fix a few compiler warnings - add -e and -h options to tac_pwd - include crypt.h if it exists (solaris) - make configure options --with-{user,group}id work F4.0.4.7 - make configure option --with-skey work - raise a few logs from INFO to NOTICE, to allow syslogd filtering of some rather noisey logs - add ACL checking for authorization, for the case where tacacs is only used for authorization. F4.0.4.8 - if -B is used, add the bind address in the PID filename - from Ian Dickinson - "acl" is an AV pair for service exec. Within service attribute parsing, do not parse "acl" as the acl (or connection ACL) keyword. This is a hack; the parser is rather lame - noted by Bryce Kahle - fix md4 for LP64 - do not accept skey keywords unless compiled with skey support - fix skey enable password type - bit from Ed Ravin - skey prompt ("challenge") is "S/Key challenge", not "Password" - make "daemon" the default syslog facility and add a syslog config statement - add support for user authentication via PAM F4.0.4.9 - clean-up bogus nopasswd_str protoypes that gcc4 did not like F4.0.4.10 - Fix PAM for linux, which does not offer PAM_AUTHOK for pam_set_item() and requires a pam_conv function even with PAM_SILENT - reported and tested by Stefan Oettl F4.0.4.11 - Fix OS X and build problems and do not prototype errno - from Georg Schwarz F4.0.4.12 - Fix typo in usage message - from Georg Schwarz - Various tac_plus.conf.5 fixes - from Georg Schwarz - escape the escape backslash of the ACL examples - from Georg Schwarz - Fix a LP64 bug where VALUE (union v) consisting of pointer was intialized like an int - reported by brad dreisbach F4.0.4.13 - Rename convert.pl to tac_convert and install it - install users_guide F4.0.4.14 - Add notes about PAM to the user guide and tac_plus.conf(5) - Log login failures with the username, NAS address and NAS tty - requested by Andi Bauer - ACLs were not applied through the default authentication (ie: user=DEFAULT) path - reported by Robert Lister F4.0.4.15 - Check data lengths in debugging functions - reported by Antonin Vitecek - Fix syslog facility selection - from Timo Vanoni & Josef Voggesser - Add -G/foreground option - Deal with missing socklen_t F4.0.4.16 - Few innocuous changes from or inspired by FreeBSD ports - Deal with max-session finger format difference in a way that does not require knowing which IOS is being fingered. - The header encryption field is really a flags field which includes a single-session option (which we'd like to support) - Check return of write() for interrupts when writing arguments to external scripts. - -G was not remaining in foreground - From Nathan Schrenk - Do not attempt to remove the pidfile if the pidfilebuf was truncated or we could not open the file. - Add 'accounting syslog;' configuration knob - mostly from Mark Ellzey Thomas - Notes about PAM - from Aaron Scarisbrick - Allow PAM debug message with tac_plus password debugging option - from Aaron Scarisbrick - Allow \'s within quoted words in tac_plus.conf - from Jesse Zbikowski - Allow 'file' for host and user enable - part from Jeff Gehlbach via Daniel Schmidt - Fix possible buffer overflow for arap - noted by Oren Nechushtan F4.0.4.17 - Move REARMSIGNAL definition to autoconf - Move REAPCHILD definition to autoconf and check if SIG_IGN works - Move SIGCHLD handling to apply to all daemon personalities - partly from John Payne F4.0.4.18 - Fix missing printf argument in debug output - Add "enable = nopassword" to users, groups and hosts. F4.0.4.19 - offer $ip to before/after authorization scripts - wtmp and accounting files do not need to be mutually exclusive - add authorization script example - from Daniel Schmidt - add partial support for single-connection mode - convert select()s to poll()s F4.0.4.20 - remove stupid error message about running as root - Drop the private regex library in favor of libc's. A system w/o a regex is one I dont care about. - finally remove config parsing for 'default authorization = permit' - apply ACLs to pap, chap, arap and ms-chap authentication too - change accounting log time format to match syslog - do_auth.py fix from Daniel Schmidt - import fdes from David G. Koontz (1991) for ARAP/MSCHAP_DES - move MSCHAP define to autoconf; --enable-mschap - use the fdes code for ARAP_DES and MSCHAP_DES. NOTE: I have no way to test this. lmk if it does not work. - increase NAC address array size. affects the format of the tacacs wholog file (TACPLUS_WHOLOGFILE); existing file should be removed. - add comments to tac_plus.conf.5 about cipher algorithms in password_spec - do_auth.py - Fixed reression, Support for replacing av pairs - from Daniel Schmidt F4.0.4.21 - do_auth.py - better Nexus support, better AV replacement, and only send roles to Nexus - from Daniel Schmidt - fix bug in checking the return value of regexec() for login and enable ACLs. - do_auth.py - better Nexus support, better AV replacement, and only F4.0.4.22 - check of regexec() return value inverted - from Ignas Kazlauskas F4.0.4.23 - fix build on netbsd - update PAM includes for OSX - YiJia Zhang F4.0.4.24 - allow PAM for pap authentication - Jeroen Nijhof - replace home-grown vprintf in report() with vsnprintf - Robert Swiecki - dont use report in signal handler, since report uses syslog which uses malloc - Robert Swiecki - use volatile sig_atomic_t 'reinitialize' variable - Robert Swiecki - use snprintf in get_authen_continue() and send_authen_error() and check return - Robert Swiecki - make snprintf buffers of get_authen_continue() and send_authen_error() at least NI_MAXHOST bytes - Robert Swiecki F4.0.4.25 - add -m (md5) option to tac_pwd. XXX could use better salt generation - use random() in tac_pwd if available and generate 4 bytes of salt for md5. - sprintf -> snprintf - Robert Swiecki - more pkt size checking in acct.c, authen.c, author.c - Robert Swiecki - free(pak) in start_session() not in account(), for consistency F4.0.4.26 - add optional securid support via aceclient library - Matt Addison - use localtime instead of gmtime for log messages so that the timezone is inheritted. - allow file authentication for PAP authorization