path: root/README

		   Kerberos Version 5, Release 1.3

			    Release Notes
			The MIT Kerberos Team

Unpacking the Source Distribution
---------------------------------

The source distribution of Kerberos 5 comes in a gzipped tarfile,
krb5-1.3.tar.gz.  Instructions on how to extract the entire
distribution follow.

If you have the GNU tar program and gzip installed, you can simply do:

	gtar zxpf krb5-1.3.tar.gz

If you don't have GNU tar, you will need to get the FSF gzip
distribution and use gzcat:

	gzcat krb5-1.3.tar.gz | tar xpf -

Both of these methods will extract the sources into krb5-1.3/src and
the documentation into krb5-1.3/doc.

Building and Installing Kerberos 5
----------------------------------

The first file you should look at is doc/install-guide.ps; it contains
the notes for building and installing Kerberos 5.  The info file
krb5-install.info has the same information in info file format.  You
can view this using the GNU emacs info-mode, or by using the
standalone info file viewer from the Free Software Foundation.  This
is also available as an HTML file, install.html.

Other good files to look at are admin-guide.ps and user-guide.ps,
which contain the system administrator's guide, and the user's guide,
respectively.  They are also available as info files
kerberos-admin.info and krb5-user.info, respectively.  These files are
also available as HTML files.

If you are attempting to build under Windows, please see the
src/windows/README file.

Reporting Bugs
--------------

Please report any problems/bugs/comments using the krb5-send-pr
program.  The krb5-send-pr program will be installed in the sbin
directory once you have successfully compiled and installed Kerberos
V5 (or if you have installed one of our binary distributions).

If you are not able to use krb5-send-pr because you haven't been able
compile and install Kerberos V5 on any platform, you may send mail to
krb5-bugs@mit.edu.

You may view bug reports by visiting

http://krbdev.mit.edu/rt/

and logging in as "guest" with password "guest".

Notes, Major Changes, and Known Bugs for 1.3
--------------------------------------------

* We now install the compile_et program, so other packages can use the
  installed com_err library with their own error tables.  (If you use
  our com_err code, that is; see below.)

* The header files we install now assume ANSI/ISO C ('89, not '99).
  We have stopped testing on SunOS 4, even with gcc.  Some of our code
  now has C89-based assumptions, like free(NULL) being well defined,
  that will probably frustrate any attempts to run this code under SunOS
  4 or other pre-C89 systems.

* Some new code, bug fixes, and cleanup for IPv6 support.  [[TODO:
  Insert list of (non-)supporting programs and libraries here.]]

* We have upgraded to autoconf 2.52 (or later), and the syntax for
  specifying certain configuration options have changed.  For example,
  autoconf 2.52 configure scripts let you specify command-line options
  like "configure CC=/some/path/foo-cc", so we have removed some of
  our old options like --with-cc in favor of this approach.

* The client libraries can now use TCP to connect to the KDC.  This
  may be necessary when talking to Microsoft KDCs (domain controllers),
  if they issue you tickets with lots of PAC data.

* If you have versions of the com_err, ss, or Berkeley DB packages
  installed locally, you can use the --with-system-et,
  --with-system-ss, and --with-system-db configure options to use them
  rather than using the versions supplied here.  Note that the
  interfaces are assumed to be similar to those we supply; in
  particular, some older, divergent versions of the com_err library
  may not work with the krb5 sources.  Many configure-time variables
  can be used to help the compiler and linker find the installed
  packages; see the build documentation for details.

* The AES cryptosystem has been implemented.  However, support in the
  Kerberos GSSAPI mechanism has not been written (or even fully
  specified), so it's not fully enabled.  See the documentation for
  details.

Major changes listed by ticket ID
---------------------------------

* [492] PRNG breakage on 64-bit platforms no longer an issue due to
  new PRNG implementation.

* [523] Client library is now compatible with the RC4-based
  cryptosystem used by Windows 2000.

* [709] krb4 long lifetime support has been implemented.

* [880] krb5_gss_register_acceptor_identity() implemented (is called
  gsskrb5_register_acceptor_identity() by Heimdal).

* [1156, 1209] It is now possible to use the system com_err to build
  this release.

* [1174] TCP support added to client library.

* [1175] TCP support added to the KDC, but is disabled by default.

* [1176] autoconf-2.5x is now required by the build system.

* [1184] It is now possible to use the system Berkeley/Sleepycat DB
  library to build this release.

* [1189, 1251] The KfM krb4 library source base has been merged.

* [1190] The default KDC master key type is now triple-DES.  KDCs
  being updated may need their config files updated if they are not
  already specifying the master key type.

* [1190] The default ticket lifetime and default maximum renewable
  ticket lifetime have been extended to one day and one week,
  respectively.

* [1191] A new script, k5srvutil, may be used to manipulate keytabs in
  ways similar to the krb4 ksrvutil utility.

* [1281] The "fakeka" program, which emulates the AFS kaserver, has
  been integrated.  Thanks to Ken Hornstein.

* [1377, 1442, 1443] The Microsoft set-password protocol has been
  implemented.  Thanks to Paul Nelson.

* [1372] There is no longer a need to create a special keytab for
  kadmind.  The legacy administration daemons "kadmind4" and
  "v5passwdd" will still require a keytab, though.

* [1385, 1395, 1410] The krb4 protocol vulnerabilities
  [MITKRB5-SA-2003-004] have been worked around.  Note that this will
  disable krb4 cross-realm functionality, as well as krb4 triple-DES
  functionality.  Please see doc/krb4-xrealm.txt for details of the
  patch.

* [1393] The xdrmem integer overflows [MITKRB5-SA-2003-003] have
  been fixed.

* [1397] The krb5_principal buffer bounds problems
  [MITKRB5-SA-2003-005] have been fixed.  Thanks to Nalin Dahyabhai.

* [1415] Subsession key negotiation has been fixed to allow for
  server-selected subsession keys in the future.

* [1418, 1429, 1446, 1484, 1486, 1487] The AES cryptosystem has been
  implemented.  It is not usable for GSSAPI, though.

* [1491] The client-side functionality of the krb524 library has been
  moved into the krb5 library.

* [1551] The heuristic for locating the Kerberos v4 KDC by prepending
  "kerberos." to the realm name if no config file or DNS information
  is available has been removed.

Minor changes listed by ticket ID
---------------------------------

* [90] default_principal_flags documented.

* [175] Docs refer to appropriate example domains/IPs now.

* [433] --includedir honored now.

* [479] unused argument in try_krb4() in login.c deleted.

* [608] login.krb5 handles SIGHUP more sanely now and thus avoids
  getting the session into a weird state w.r.t. job control.

* [620] krb4 encrypted rcp should work a little better now.  Thanks to
  Greg Hudson.

* [673] Weird echoing of admin password in kadmin client worked around
  by not using buffered stdio calls to read passwords.

* [677] The build system has been reworked to allow the user to set
  CFLAGS, LDFLAGS, CPPFLAGS, etc. reasonably.

* [680] Related to [673], rewrite krb5_prompter_posix() to no longer
  use longjmp(), thus avoiding some bugs relating to non-restoration
  of terminal settings.

* [697] login.krb5 no longer zeroes out the terminal window size.

* [710] decomp_ticket() in libkrb4 now looks up the local realm name
  more correctly.  Thanks to Booker Bense.

* [771] .rconf files are excluded from the release now.

* [772] LOG_AUTHPRIV syslog facility is now usable for logging on
  systems that support it.

* [844] krshd now syslogs using the LOG_AUTH facility.

* [850] Berekely DB build is better integrated into the krb5 library
  build process.

* [866] lib/krb5/os/localaddr.c and kdc/network.c use a common source
  for local address enumeration now.

* [919] kdc/network.c problems relating to SIOCGIFCONF have been
  fixed.

* [922] An overflow in the string-to-time conversion routines has been
  fixed.

* [935] des-cbc-md4 now included in default enctypes.

* [939] A minor grammatical error has been fixed in a telnet client
  error message.

* [953] des3 no longer failing on Windows due to SHA1 implementation
  problems.

* [970] A minor inconsistency in ccache.tex has been fixed.

* [971] option parsing bugs rendered irrelevant by removal of unused
  gss mechanism.

* [986] Related to [677], problems with the ordering of LDFLAGS
  initialization rendered irrelevant by use of native autoconf
  idioms.

* [992] Related to [677], quirks with --with-cc no longer relevant as
  AC_PROG_CC is used instead now.

* [999] kdc_default_options now honored in gss context initialization.

* [1006] Client library, as well as KDC, now perform reasonable
  sorting of ETYPE-INFO preauthentication data.

* [1055] NULL pointer dereferences in code calling
  krb5_change_password() have been fixed.

* [1063] Initial credentials acquisition failures related to client
  host having a large number of local network interfaces should be
  fixed now.

* [1064] krb5_auth_con_genaddrs() no longer inappropriately returns -1
  on some error cases.

* [1065, 1225] krb5_get_init_creds_password() should properly warn about
  password expiration.

* [1066] printf() argument mismatches in rpc unit tests fixed.

* [1087] ftpd no longer requires channel bindings, allowing easier use
  of ftp from behind a NAT.

* [1102] gssapi_generic.h should now work with C++.

* [1164] krb5_auth_con_gen_addrs() now properly returns errno instead
  of -1 if getpeername() fails.

* [1173] Address-less forwardable tickets will remain address-less
  when forwarded.

* [1178, 1228, 1244, 1246, 1249] Test suite has been stabilized
  somewhat.

* [1188] As part of the modernization of our usage of autoconf,
  AC_CONFIG_FILES is now used instead of passing a list of files to
  AC_OUTPUT.

* [1194] configure will no longer recurse out of the top of the source
  tree when attempting to locate the top of the source tree.

* [1192] Documentation for the krb5 afs functionality of krb524d has
  been written.

* [1195] Example krb5.conf file modified to include all enctypes
  supported by the release.

* [1202] The KDC no longer rejects unrecognized flags.

* [1211] The ASN.1 code no longer passes (harmless) uninitialized
  values around.

* [1212] libkadm5 now allows for persistent exclusive database locks.

* [1217] krb5_read_password() and des_read_password() are now
  implemented via krb5_prompter_posix().

* [1224] For SAM challenges, omitted optional strings are no longer
  encoded as zero-length strings.

* [1226] Client-side support for SAM hardware-based preauth
  implemented.

* [1229] The keytab search logic no longer fails prematurely if an
  incorrect encryption type is found.  Thanks to Wyllys Ingersoll.

* [1232] If the master KDC cannot be resolved, but a slave is
  reachable, the client library now returns the real error from the
  slave rather than the resolution failure from the master.  Thanks to
  Ben Cox.

* [1234] Assigned numbers for SAM preauth have been corrected.
  sam-pk-for-sad implementation has been aligned.

* [1237] Profile-sharing optimizations from KfM have been merged.

* [1240] Windows calling conventions for krb5int_c_combine_keys() have
  been aligned.

* [1242] Build system incompatibilities with Debian's chimeric
  autoconf installation have been worked around.

* [1256] Incorrect sizes passed to memset() in combine_keys()
  operations have been corrected.

* [1260] Client credential lookup now gets new service tickets in
  preference to attempting to use expired ticketes.  Thanks to Ben
  Cox.

* [1262] Sequence numbers are now unsigned; negative sequence numbers
  will be accepted for the purposes of backwards compatibility.

* [1263] A heuristic for matching the incorrectly encoded sequence
  numbers emitted by Heimdal implementations has been written.

* [1284] kshd accepts connections by IPv6 now.

* [1292] kvno manpage title fixed.

* [1293] Source files no longer explicitly attempt to declare errno.

* [1304] kadmind4 no longer leaves sa_flags uninitialized.

* [1305] Expired tickets now cause KfM to pop up a password dialog.

* [1309] krb5_send_tgs() no longer leaks the storage associated with
  the TGS-REQ.

* [1310] kadm5_get_either() no longer leaks regexp library memory.

* [1311] Output from krb5-config no longer contains spurious uses of
  $(PURE).

* [1324] The KDC no longer logs an inappropriate "no matching key"
  error when an encrypted timestamp preauth password is incorrect.

* [1342] gawk is no longer required for building kerbsrc.zip for the
  Windows build.

* [1346] gss_krb5_ccache_name() no longer attempts to return a pointer
  to freed memory.

* [1352] GSS_C_PROT_READY_FLAG is no longer asserted inappropriately
  during GSSAPI context establishment.

* [1356] krb5_gss_accept_sec_context() no longer attempts to validate
  a null credential if one is passed in.

* [1362] The "-a user" option to telnetd now does the right thing.
  Thanks to Nathan Neulinger.

* [1363] ksu no longer inappropriately syslogs to stderr.

* [1357] krb__get_srvtab_name() no longer leaks memory.

* [1373] Handling of SAM preauth no longer attempts to stuff a size_t
  into an unsigned int.

* [1387] BIND versions later than 8 now supported.

* [1392] The getaddrinfo() wrapper should work better on AIX.

* [1400] If DO_TIME is not set in the auth_context, and no replay
  cache is available, no replay cache will be used.

* [1406] libdb is no longer installed.  If you installed
  krb5-1.3-alpha1, you should ensure that no spurious libdb is left in
  your install tree.

* [1412] ETYPE_INFO handling no longer goes into an infinite loop.

* [1414] libtelnet is now built using the same library build framework
  as the rest of the tree.

* [1417] A minor memory leak in krb5_read_password() has been fixed.

* [1419] A memory leak in asn1_decode_kdc_req_body() has been fixed.

* [1435] inet_ntop() is now emulated when needed.

* [1439] krb5_free_pwd_sequences() now correctly frees the entire
  sequence of elements.

* [1440] errno is no longer explicitly declared.

* [1441] kadmind should now return useful errors if an unrecognized
  version is received in a changepw request.

* [1454, 1480, 1517, 1525] The etype-info2 preauth type is now
  supported.

* [1459] (KfM/KLL internal) config file resolution can now be
  prevented from accessing the user's homedir.

* [1463] Preauth handling in the KDC has been reorganized.

* [1470] Double-free in client-side preauth code fixed.

* [1473] Ticket forwarding when the TGS and the end service have
  different enctypes should work somewhat better now.

* [1474] ASN.1 testsuite memory management has been cleaned up a
  little to allow for memory leak checking.

* [1476] Documentation updated to reflect default krb4 mode.

* [1482] RFC-1964 OIDs now provided using the suggested symbolic
  names.

* [1483, 1528] KRB5_DEPRECATED is now false by default on all
  platforms.

* [1488] The KDC will now return integrity errors if a decryption
  error is responsible for preauthentication failure.

* [1492] The autom4te.cache directories are now deleted from the
  release tarfiles.

* [1501] Writable keytabs are registered by default.

* [1515] The check for cross-realm TGTs no longer reads past the end
  of an array.

* [1518] The kdc_default_options option is now actually honored.

* [1519] The changepw protocol implementation in kadmind now logs
  password changes.

* [1520] Documentation of OS-specific build options has been updated.

--[ DELETE BEFORE RELEASE ---changes to unreleased code, etc.--- ]--

* [1054] KRB-CRED messages for RC4 are encrypted now.

* [1177] krb5-1-2-2-branch merged onto trunk.

* [1193] Punted comment about reworking key storage architecture.

* [1208] install-headers target implemented.

* [1223] asn1_decode_oid, asn1_encode_oid implemented

* [1248] RC4 is explicitly excluded from combine_keys.

* [1276] Generated dependencies handle --without-krb4 properly now.

* [1384, 1413] Use of autoconf-2.52 in util/reconf will now cause a
  warning.

* [1388] DNS support is turned on in KfM.

* [1391] Fix kadmind startup failure with krb4 vuln patch.

* [1409] get_ad_tkt() now prompts for password if there are no tickets
  (in KfM).

* [1447] vts_long() and vts_short() work now.

* [1462] KfM adds exports of set_pw calls.

* [1477] compile_et output not used in err_txt.c.

* [1495] KfM now exports string_to_key_with_params.

* [1512, 1522] afs_string_to_key now works with etype_info2.

* [1514] krb5int_populate_gic_opt returns void now.

Copyright Notice and Legal Administrivia
----------------------------------------

Copyright (C) 1985-2003 by the Massachusetts Institute of Technology.

All rights reserved.

Export of this software from the United States of America may require
a specific license from the United States Government.  It is the
responsibility of any person or organization contemplating export to
obtain such a license before exporting.

WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
distribute this software and its documentation for any purpose and
without fee is hereby granted, provided that the above copyright
notice appear in all copies and that both that copyright notice and
this permission notice appear in supporting documentation, and that
the name of M.I.T. not be used in advertising or publicity pertaining
to distribution of the software without specific, written prior
permission.  Furthermore if you modify this software you must label
your software as modified software and not distribute it in such a
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M.I.T. makes no representations about the suitability of this software
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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Individual source code files are copyright MIT, Cygnus Support,
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Project Athena, Athena, Athena MUSE, Discuss, Hesiod, Kerberos, Moira,
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"Commercial use" means use of a name in a product or other for-profit
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MIT trademarks in order to convey information (although in doing so,
recognition of their trademark status should be given).

----

The following copyright and permission notice applies to the
OpenVision Kerberos Administration system located in kadmin/create,
kadmin/dbutil, kadmin/passwd, kadmin/server, lib/kadm5, and portions
of lib/rpc:

   Copyright, OpenVision Technologies, Inc., 1996, All Rights Reserved

   WARNING: Retrieving the OpenVision Kerberos Administration system 
   source code, as described below, indicates your acceptance of the 
   following terms.  If you do not agree to the following terms, do not 
   retrieve the OpenVision Kerberos administration system.

   You may freely use and distribute the Source Code and Object Code
   compiled from it, with or without modification, but this Source
   Code is provided to you "AS IS" EXCLUSIVE OF ANY WARRANTY,
   INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY OR
   FITNESS FOR A PARTICULAR PURPOSE, OR ANY OTHER WARRANTY, WHETHER
   EXPRESS OR IMPLIED.  IN NO EVENT WILL OPENVISION HAVE ANY LIABILITY
   FOR ANY LOST PROFITS, LOSS OF DATA OR COSTS OF PROCUREMENT OF 
   SUBSTITUTE GOODS OR SERVICES, OR FOR ANY SPECIAL, INDIRECT, OR
   CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, INCLUDING, 
   WITHOUT LIMITATION, THOSE RESULTING FROM THE USE OF THE SOURCE 
   CODE, OR THE FAILURE OF THE SOURCE CODE TO PERFORM, OR FOR ANY 
   OTHER REASON.

   OpenVision retains all copyrights in the donated Source Code. OpenVision
   also retains copyright to derivative works of the Source Code, whether
   created by OpenVision or by a third party. The OpenVision copyright 
   notice must be preserved if derivative works are made based on the 
   donated Source Code.

   OpenVision Technologies, Inc. has donated this Kerberos 
   Administration system to MIT for inclusion in the standard 
   Kerberos 5 distribution.  This donation underscores our 
   commitment to continuing Kerberos technology development 
   and our gratitude for the valuable work which has been 
   performed by MIT and the Kerberos community.

----

    Portions contributed by Matt Crawford <crawdad@fnal.gov> were
    work performed at Fermi National Accelerator Laboratory, which is
    operated by Universities Research Association, Inc., under
    contract DE-AC02-76CHO3000 with the U.S. Department of Energy.

---- The implementation of the Yarrow pseudo-random number generator
in src/lib/crypto/yarrow has the following copyright:

Copyright 2000 by Zero-Knowledge Systems, Inc.

Permission to use, copy, modify, distribute, and sell this software
and its documentation for any purpose is hereby granted without fee,
provided that the above copyright notice appear in all copies and that
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Inc. not be used in advertising or publicity pertaining to
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

---- The implementation of the AES encryption algorithm in
src/lib/crypto/aes has the following copyright:

 Copyright (c) 2001, Dr Brian Gladman <brg@gladman.uk.net>, Worcester, UK.
 All rights reserved.

 LICENSE TERMS

 The free distribution and use of this software in both source and binary 
 form is allowed (with or without changes) provided that:

   1. distributions of this source code include the above copyright 
      notice, this list of conditions and the following disclaimer;

   2. distributions in binary form include the above copyright
      notice, this list of conditions and the following disclaimer
      in the documentation and/or other associated materials;

   3. the copyright holder's name is not used to endorse products 
      built using this software without specific written permission. 

 DISCLAIMER

 This software is provided 'as is' with no explcit or implied warranties
 in respect of any properties, including, but not limited to, correctness 
 and fitness for purpose.



Acknowledgements
----------------

Appreciation Time!!!!  There are far too many people to try to thank
them all; many people have contributed to the development of Kerberos
V5.  This is only a partial listing....

Thanks to Paul Vixie and the Internet Software Consortium for funding
the work of Barry Jaspan.  This funding was invaluable for the OV
administration server integration, as well as the 1.0 release
preparation process.

Thanks to John Linn, Scott Foote, and all of the folks at OpenVision
Technologies, Inc., who donated their administration server for use in
the MIT release of Kerberos.

Thanks to Jeff Bigler, Mark Eichin, Marc Horowitz, Nancy Gilman, Ken
Raeburn, and all of the folks at Cygnus Support, who provided
innumerable bug fixes and portability enhancements to the Kerberos V5
tree.  Thanks especially to Jeff Bigler, for the new user and system
administrator's documentation.

Thanks to Doug Engert from ANL for providing many bug fixes, as well
as testing to ensure DCE interoperability.

Thanks to Ken Hornstein at NRL for providing many bug fixes and
suggestions, and for working on SAM preauthentication.

Thanks to Matt Crawford at FNAL for bugfixes and enhancements.

Thanks to Sean Mullan and Bill Sommerfeld from Hewlett Packard for
their many suggestions and bug fixes.

Thanks to Nalin Dahyabhai of RedHat and Chris Evans for locating and
providing patches for numerous buffer overruns.

Thanks to Christopher Thompson and Marcus Watts for discovering the
ftpd security bug.

Thanks to Paul Nelson of Thursby Software Systems for implementing the
Microsoft set password protocol.

Thanks to the members of the Kerberos V5 development team at MIT, both
past and present: Danilo Almeida, Jay Berkenbilt, Richard Basch, Mitch
Berger, John Carr, Don Davis, Alexandra Ellwood, Nancy Gilman, Matt
Hancher, Sam Hartman, Paul Hill, Marc Horowitz, Eva Jacobus, Miroslav
Jurisic, Barry Jaspan, Geoffrey King, John Kohl, Peter Litwack, Scott
McGuire, Kevin Mitchell, Cliff Neuman, Paul Park, Ezra Peisach, Chris
Provenzano, Ken Raeburn, Jon Rochlis, Jeff Schiller, Jen Selby, Brad
Thompson, Harry Tsai, Ted Ts'o, Marshall Vale, Tom Yu.