In prepare_error_as(), if krb5_us_timeofday() fails and error pa-data
was supplied, the FAST cookie and a shallow copy of the error padata
can be leaked. Reported by Will Fiveash.
Greg Hudson [Tue, 3 May 2016 17:22:46 +0000 (13:22 -0400)]
Add PKINIT support for OpenSSL 1.1.0
OpenSSL 1.1 makes the DH, EVP_MD_CTX, X509, and X509_STORE_CTX types
opaque, removes asn1_mac.h, removes the M_ASN1_* macros, and removes
CRYPTO_malloc_init(). Change the PKINIT code to work with OpenSSL 1.1
while retaining compatibility with OpenSSL 1.0. The new code uses
X509_STORE_set_verify_cb(), which is not present in OpenSSL 0.9, so
require OpenSSL 1.0 for PKINIT support.
Greg Hudson [Fri, 17 Jun 2016 16:00:21 +0000 (12:00 -0400)]
Add libk5crypto support for OpenSSL 1.1.0
OpenSSL 1.1.0 makes the EVP_MD_CTX, EVP_CIPH_CTX, and EVP_HMAC_CTX
types opaque. Change the libk5crypto OpenSSL code to work with
OpenSSL 1.1 while retaining compatibility with previous versions.
Add the prng_os.c module, using the name previously occupied by what
is now prng_device.c. Unlike prng_device.c, this PRNG module
maintains no file descriptor and just uses k5_os_random(), which is
most efficient on platforms which have a getrandom() system call.
Sarah Day [Fri, 19 Aug 2016 17:47:22 +0000 (13:47 -0400)]
Fix KDC lookaside cache entry count tracking
The KDC lookaside cache was incrementing num_entries when an entry was
added, but it did not decrement num_entries when an entry was removed.
Decrement num_entries in discard_entry(). Also fix some function
comments to correctly explain what the function is doing, and refactor
kdc_insert_lookaside by moving the code that inserts an entry into a
new static function called insert_entry().
Tom Yu [Tue, 20 Sep 2016 19:58:50 +0000 (15:58 -0400)]
Silence warnings in lib/rpc
Cast through (void *) in xdr.c to silence pointer target width
warnings. In xdr_sizeof.c, use x_private and x_base as proper
pointers as in xdr_mem.c instead of trying to store an integer in a
pointer.
Matt Rogers [Wed, 24 Aug 2016 04:42:16 +0000 (00:42 -0400)]
Add configuration option for URI lookups
Add the boolean option 'dns_uri_lookup' to krb5.conf's libdefaults
section, to allow disabling URI lookups seperately from SRV lookups.
The default value is 'true'.
Matt Rogers [Mon, 18 Jul 2016 16:13:55 +0000 (12:13 -0400)]
Enable KDC discovery through DNS URI records
Add the dns_locate_server_uri(), locate_uri(), and parse_uri_fields()
functions to find and process KDC service information from specially
formatted URI records detailed at
http://k5wiki.kerberos.org/wiki/Projects/KDC_Discovery
Search for URI records before searching for SRV records. Rename
dns_locate_server() to dns_locate_server_srv() for consistency. Add
URI-specific information to the t_locate_kdc host entry output.
Matt Rogers [Mon, 18 Jul 2016 14:18:45 +0000 (10:18 -0400)]
Add DNS URI query function
Add the k5_make_uri_query() function for finding URI records of a
given realm and service tag. Turn some common code shared with
krb5int_make_srv_query_realm() into helper functions.
Matt Rogers [Wed, 13 Jul 2016 20:27:57 +0000 (16:27 -0400)]
Add a master flag to struct server_entry
URI lookups will contain a flag to indicate if the KDC is a master or
normal KDC, so add a master variable to server_entry. The default
value is -1 and means that the status has not been determined by the
information source. If the flag is set, use it to avoid a seperate
lookup in k5_kdc_is_master().
Also add a "master" argument to add_host_to_list(). Adjust the
existing calls of add_host_to_list() for the new argument (set to -1
as they are from non-URI lookups).
Tom Yu [Fri, 16 Sep 2016 23:02:45 +0000 (19:02 -0400)]
Remove more non-DFSG documentation
Delete an Internet-Draft that we missed on an earlier pass. Also
remove ISOC/BCP 78 copyright language because the remaining extracts
from RFCs are small enough to be fair use.
Tom Yu [Wed, 31 Aug 2016 17:40:22 +0000 (13:40 -0400)]
Stop generating doc/CHANGES
Shipping a 10MB+ doc/CHANGES file in the release tarball doesn't make
much sense in a modern context where historical information is readily
available in a distributed version control system.
Tom Yu [Wed, 7 Sep 2016 21:28:34 +0000 (17:28 -0400)]
Fix unaligned accesses in bt_split.c
In the libdb2 btree back end, splitting a page at an overflow key
could result in an unaligned access, causing a crash (and data
corruption) on platforms with strict alignment. This probably occurs
only rarely in practice.
Add a public libkdb5 function to register the KDB keytab type. This
functionality is needed for out-of-tree KDC servers such as the Samba
kpasswd service.
Ben Kaduk [Thu, 11 Aug 2016 04:25:47 +0000 (23:25 -0500)]
Fix build with -O3 on ppc64el
Ubuntu runs ppc64el builds with -O3, which elicited a few warnings
from gcc that were not generated elsewhere, as documented at
https://bugs.launchpad.net/ubuntu/+source/krb5/+bug/1592841 .
Initialize the output variable at the top of a couple of helper functions
to silence the uninitialized-variable warnings.
Commit e3d9f03a658e247dbb43cb345aa93a28782fd995 (ticket 8481) added
several checks for negative length values when decoding DB2 principal
entries, including two unnecessary checks on unsigned values. Remove
those checks as they can generate warnings.
Greg Hudson [Thu, 25 Aug 2016 19:37:23 +0000 (15:37 -0400)]
Consolidate sn2princ_realm() in kprop and kpropd
In kprop and kpropd, factor out the duplicated implementation of
sn2princ_with_realm() into kprop_util.c. Rename it to
sn2princ_realm(), remove the type parameter, and require the sname
parameter to be specified. Rewrite the function to use
krb5_expand_hostname(), avoiding an unnecessary hostrealm lookup.
We depend on the behavior of having a separate subshell for each line in
our Makefiles, so force it where make (observed FreeBSD 10.3) does not
create one.
[ghudson@mit.edu: also changed rules in config/post.in]
Tom Yu [Thu, 25 Aug 2016 22:02:56 +0000 (18:02 -0400)]
Avoid byte-swap cache corruption in libdb2
Apply a patch from NetBSD to restore the cached copy of a page to the
machine byte order after a write operation swapped it to the file byte
order. As a regression test, modify test13 to sync the database file
after each put to exercise this bug.
Tom Yu [Fri, 26 Aug 2016 22:40:49 +0000 (18:40 -0400)]
Add known file test case for btree byte swap
Add a regression test for the preceding bugfix. This test uses btree
database files with known contents and byte orders with short keys and
overflow data items.
Tom Yu [Fri, 26 Aug 2016 19:24:52 +0000 (15:24 -0400)]
Fix btree byte swapping for overflow data
When operating on a btree database file of the opposite endianness,
libdb2 was swapping the wrong bytes if a record had a short key but
overflow data. Fix this bug by not incrementing p when swapping a
P_BIGKEY overflow pointer, and by always skipping the full key size
before swapping a P_BIGDATA overflow pointer (instead of assuming that
a P_BIGKEY pointer always precedes a P_BIGDATA pointer).
Greg Hudson [Fri, 26 Aug 2016 16:55:40 +0000 (12:55 -0400)]
Fix thread support for Solaris and simplify
threads.c failed to build on Solaris afer commit 17932091cc0d5981c5a78d389ffa4a5c7b532bd6 because k5-thread.h did not
define the conditional k5_once_t structure (because NO_WEAK_PTHREADS
is defined) but threads.c tried to build the conditional k5_once()
function.
Use a single preprocessor symbol, USE_CONDITIONAL_PTHREADS, to
determine whether to use and define pthreads functions which
conditionalize on whether pthreads is loaded. In threads.c, move the
new k5_once() definitions into the USE_CONDITIONAL_PTHREADS block,
defining a stub function if other code will not refer to it.
Also move #pragma weak declarations from k5-threads.h into threads.c,
as we should no longer be conditionally referring to those symbols
outside of threads.c.
Also eliminate some missing-prototype warnings where we define
functions for linker-visibility but don't have corresponding
prototypes in k5-threads.h.
Greg Hudson [Tue, 23 Aug 2016 17:41:00 +0000 (13:41 -0400)]
Improve checking of decoded DB2 principal values
In krb5_decode_princ_entry(), verify the length of the principal name
before calling krb5_parse_name() or strlen(), to avoid a possible
buffer read overrun. Check all length fields for negative values.
Avoid performing arithmetic as part of bounds checks. If the value of
key_data_ver is unexpected, return KRB5_KDB_BAD_VERSION instead of
aborting.
Tom Yu [Sat, 27 Aug 2016 21:04:11 +0000 (17:04 -0400)]
Fix check-pytests-no
Commit 0db097ba8b605ea7a6e0364ad786da6528868179 accidentally removed
the $(SKIPTESTS) line from check-pytests-no, causing a syntax error
when running "make check" when python is missing or not sufficiently
new.
To work correctly with older Samba clients, we should guess the mutual
flag based on the ap_options from the AP-REQ and not set it
unconditionally. Found by the Samba torture testsuite.
[ghudson@mit.edu: edited comments and commit message]
Greg Hudson [Tue, 23 Aug 2016 16:38:54 +0000 (12:38 -0400)]
Remove svcauth_gss_creds
svcauth_gss_creds was in the libgssrpc library export list (as
gssrpc_svc_auth_gss_creds) but was not declared in a public header and
has no value to applications. Remove it.
Greg Hudson [Tue, 23 Aug 2016 16:35:50 +0000 (12:35 -0400)]
Fix GSSRPC server credential memory leak
In svc_auth_gss.c, stop using the global svcauth_gss_creds, and
instead keep a credential in struct svc_rpc_gss_data. This change
ensures that the same credential is used for each accept_sec_context
call for a particular context, and ensures that the credential is
freed when the authentication data is destroyed. Also, do not acquire
a credential when the default name is used (as it is in kadmind) as it
is not needed.
Leave the svcauth_gss_creds around for the backportable fix as it is
in the library export list. It will be removed in a subsequent
commit.
Sarah Day [Mon, 8 Aug 2016 20:40:17 +0000 (16:40 -0400)]
Convert k5-thread macros to functions
k5-thread.h has several pthread support calls defined as macros which
conditionally call pthread functions. If a program is linked with
libkrb5support and uses these macros, and the program isn't compiled
with -fPIC, then it can crash if the pthread functions are linked at
runtime (via LD_PRELOAD, for instance) but not at compile time.
Convert the conditional macros to functions, so that libkrb5support is
responsible for determining whether pthreads is loaded and for calling
the pthreads functions if it is.
Greg Hudson [Fri, 20 Nov 2015 00:32:11 +0000 (19:32 -0500)]
Use krb5_expand_hostname() to get admin service
In libkadm5's kadm5_get_admin_service_name(), use
krb5_expand_hostname() instead of custom canonicalization code to
canonicalize the hostname. There are some minor behavior differences;
in addition to the changes listed in the previous commit, the old code
did not downcase the result of the getaddrinfo() lookup, while the new
code does.
Greg Hudson [Tue, 17 Nov 2015 18:33:21 +0000 (13:33 -0500)]
Use krb5_expand_hostname() when creating KDB
In kdb5_util's add_admin_princs(), use krb5_expand_hostname() instead
of custom canonicalization code to canonicalize the hostname. There
are some minor behavior differences:
* Canonicalization will no longer use AI_ADDRCONFIG.
* Canonicalization will use reverse DNS if configuration permits.
* Canonicalization will be affected by the dns_canonicalize_hostname
and rdns profile variables.
* If name lookup fails, the original hostname will be used.
* A trailing dot will be removed from the name lookup result, if
present.
Greg Hudson [Tue, 17 Nov 2015 18:06:31 +0000 (13:06 -0500)]
Add krb5_expand_hostname() API
Add a new public libkrb5 function expand_hostname(). It follows the
same contract as the Heimdal function, except that the caller should
use krb5_free_string() instead of krb5_xfree() to free the result.
As a small side effect, we no longer remove trailing dots from the
hostname in krb5_sname_to_principal() when invoked with type
KRB5_NT_UNKNOWN. Adjust a test case in t_sn2princ.py accordingly.
In spnego_gss_import_cred(), use create_spnego_cred() to create the
SPNEGO credential structure. Prior to this change, an imported SPNEGO
cred did not initialize the no_ask_integ field (added by commit cf39ed349976908626cad3e05e17788f8334bce9, ticket #6938).
Greg Hudson [Mon, 8 Aug 2016 18:39:24 +0000 (14:39 -0400)]
Add another AD-SIGNTICKET corner case test
Prior to the fix for #8139, forwarded TGTs obtained across a krbtgt
re-key could fail if the preferred krbtgt enctype changed, because
krb5_c_verify_checksum() returns an bad-enctype error due to the
mismatched checksum. Add a test case for this scenario, using a new
test harness program which obtains a forwarded TGT.
Greg Hudson [Wed, 17 Aug 2016 15:50:31 +0000 (11:50 -0400)]
Output last command info on k5test failures
When a k5test failure occurs, display the last executed command, its
command index, and its output. This will make it easier to understand
"make check" failures when it is not easy to run subsequent commands
or investigate the filesystem of the build host.
Greg Hudson [Fri, 5 Aug 2016 16:28:03 +0000 (12:28 -0400)]
Use responder for non-preauth AS requests
If no AS reply key is computed during pre-authentication (typically
because no pre-authentication was required by the KDC), ask for the
password using the responder before calling gak_fct for the key, and
supply any resulting responder items to gak_fct.
Tom Yu [Tue, 9 Aug 2016 01:46:16 +0000 (21:46 -0400)]
Recursive btree traversal test case
Add an unlink page command to the dbtest program. This dbtest command
finds a page that has both a left and a right neighbor and unlinks it,
making it inaccessible to conventional sequential traversal. This
simulates some btree corruption that has been seen in the field.
Unlike the bttest command, the dbtest unlink command always searches
for a leaf page with both a left and a right sibling, and doesn't
allow the user to specify internal pages or a specific page number.
Add a new dbtest command to recursively dump a btree database.
Add a new test case to run.test that uses these new commands to verify
the correct functioning of the recursive btree traversal options.
Tom Yu [Mon, 8 Aug 2016 12:50:40 +0000 (08:50 -0400)]
Add bttest unlink page command
To enable testing of recursive btree traversal, add an unlink page
command to the bttest program (used for debugging the libdb2 btree
back end). This new bttest command can unlink a specified page
number, or it can search for and unlink a page that has both a left
and a right sibling. (The user can specify whether to find an
internal page or a leaf page.)
This unlinking makes the page inaccessible to conventional sequential
traversal, simulating some btree corruption that has been seen in the
field.
Tom Yu [Mon, 8 Aug 2016 13:15:42 +0000 (09:15 -0400)]
Refactor btree recursive traversal code
Previous releases had a nonstandard entry point (bt_rseq) into libdb2
to perform recursive traversal of a btree database that might be
corrupt so that an operator could attempt data recovery. This entry
point became inaccessible to user commands after krb5-1.5 due to
integration of the DAL.
Refactor the recursive traversal code into the existing btree
sequential traversal code, accepting new movement flags R_RNEXT
(recursively advance to next item) and R_RPREV.
Add commands to the libdb2 btree test program bttest to exercise this
functionality. Fix up the existing "rlist" command of bttest to use
the updated interface.
Tom Yu [Mon, 8 Aug 2016 13:06:16 +0000 (09:06 -0400)]
Fix MPOOL_IGNOREPIN to ease btree debugging
Various libdb2 test programs use the MPOOL_IGNOREPIN flag to examine
arbitrary mpool pages that may or may not be pinned. This flag is
apparently intended to allow fetching pages that are already pinned,
and to avoid setting the MPOOL_PINNED flag. When there was a cache
hit, mpool_get was setting MPOOL_PINNED anyway, causing aborts when
using debugging programs such as dbtest and bttest.
Fix this inconsistency by not setting MPOOL_PINNED when returning a
cached page when the caller requested MPOOL_IGNOREPIN. In bttest, add
MPOOL_IGNOREPIN to allow dumping of pages while they are pinned
without disrupting their pinned status.
Tom Yu [Mon, 8 Aug 2016 13:13:59 +0000 (09:13 -0400)]
Make bttest build with restricted lib exports
On platforms that use strict library export lists, the libdb2 btree
debugging program bttest won't build with -DDEBUG or -DSTATISTICS
because some needed functions aren't in the export list.
Add the missing bt_debug.c and mpool.c functions to libdb.exports.
Stub out these functions when built without -DDEBUG or -DSTATISTICS to
avoid unreferenced symbols, because conditionalizing library export
lists isn't easy.
Tom Yu [Mon, 8 Aug 2016 13:12:53 +0000 (09:12 -0400)]
Fix bttest printing of unterminated strings
The libdb2 btree debugging program bttest can attempt to print keys or
data that aren't null-terminated, reading past the end of the
length-counted byte array. Use the "%.*s" format specifier to provide
an explicit length when printing keys or data.
Tom Yu [Mon, 8 Aug 2016 13:12:16 +0000 (09:12 -0400)]
Improve EINTR handling in bttest
The libdb2 btree debugging program bttest doesn't handle EINTR in its
input loop. This causes difficulties with debugging using lldb,
because bttest gets signals like SIGSTOP when being attached, and lldb
doesn't seem to share the terminal well with a program being debugged.
ticket: 8478 (new)
subject: usability improvements for bttest
Greg Hudson [Sun, 14 Aug 2016 23:00:12 +0000 (19:00 -0400)]
Allow libev to use pthreads on old platforms
The upgrade to libev 4.22 introduced the use of "memory fences" for
more reliable signal processing. Memory fences are usually
implemented using assembly or compiler primitives, but may be
implemented using pthreads as a last resort. The unmodified libev
errors out at compile time if pthreads is used, but notes that this
error can be removed if relying on pthreads is okay. Because the
project's nightly build infrastructure includes an old Solaris machine
whose toolchain is too old for any of the non-pthreads memory fence
implementations, remove the error to allow the build to succeed. (A
dependency on pthreads functions on Solaris does not require linking
with libpthread.)
Sarah Day [Mon, 15 Aug 2016 20:11:31 +0000 (16:11 -0400)]
Fix KDC to drop repeated in-progress requests
When a KDC receives a repeated request while the original request is
still in progress, it is supposed to be to drop the request. Commit f07760088b72a11c54dd72efbc5739f231a4d4b0 introduced a bug in this
logic, causing the KDC to instead send an empty reply. In
kdc_check_lookaside(), return a NULL reply_packet for empty entries,
restoring the expected behavior.
[ghudson@mit.edu: edited commit message, added a comment]
Greg Hudson [Sun, 14 Aug 2016 16:08:16 +0000 (12:08 -0400)]
Work around glibc OFD lock bug on 32-bit Linux
A bug in Gnu libc causes OFD locking to fail unpredictably on 32-bit
Linux, typically leading to deadlocks. Work around this bug by using
the fcntl64 system call and struct flock64.
See also: https://sourceware.org/bugzilla/show_bug.cgi?id=20251
Ben Kaduk [Wed, 3 Aug 2016 15:23:56 +0000 (10:23 -0500)]
Properly escape quotes for otp set_string example
The libss parser will consume paired double quotes, but within
a double-quoted region, repeated double quotes will be treated
as an escape and passed through as a single double quote.
(The new kadmin(1) parser in 1.14 that lets commands be specified
on the command line without -q does not go through the libss parser,
so standard shell methods for escaping quotes function as usual.)
Greg Hudson [Thu, 30 Jun 2016 16:32:20 +0000 (12:32 -0400)]
Add asan build support
Add the --enable-asan configure option. This option suppresses the
undefined symbol check when building shared libraries on Linux, and
adds -fsanitize=address to the compiler and linker options.
Greg Hudson [Wed, 29 Jun 2016 21:13:33 +0000 (17:13 -0400)]
Fix a variety of one-time leaks
Eliminate some memory leaks which should not affect normal operation,
but which make it harder to detect more serious memory leaks.
In kdb5_util, start using the already existing quit() function and
remove redundant DB and master key cleanup performed by individual
commands. In kdb5_destroy(), use util_context instead of creating a
new one. Add an mkey_fullname global variable and use it to make
a bunch of krb5_db_setup_mkey_name() calls unnecessary.
Greg Hudson [Tue, 28 Jun 2016 16:28:11 +0000 (12:28 -0400)]
Fix leak in gss_display_name() for non-MN names
RFC 2744 states that the gss_display_name() output_name_type result is
"a pointer into static storage, and should be treated as read-only by
the caller (in particular, the application should not attempt to free
it)". For non-mechanism names, we were making a copy of the name type
from the union name structure, causing a memory leak; stop doing that.
Greg Hudson [Mon, 27 Jun 2016 23:38:36 +0000 (19:38 -0400)]
Fix leak in k5_free_cammac()
free_vmac(), a helper function used by k5_free_cammac(), must free its
val pointer as well as the contents; otherwise the krb5_verifier_mac
container is leaked.
Greg Hudson [Mon, 27 Jun 2016 21:49:57 +0000 (17:49 -0400)]
Fix leaks on error in krb5 gss_acquire_cred()
In acquire_cred_context(), when releasing the partially constructed
cred on error, make sure to free the password and impersonator fields,
and to destroy the ccache if we created it.
Greg Hudson [Mon, 27 Jun 2016 04:21:30 +0000 (00:21 -0400)]
Fix memory leak in old gssrpc authentication
auth_gssapi_create(), which is now only used to connect to ancient
servers, can leak memory on error or when multiple GSSAPI_INIT calls
are required. Ensure that call_res is freed along all exit paths and
before each repeat clnt_call() invocation.
Greg Hudson [Fri, 24 Jun 2016 16:33:05 +0000 (12:33 -0400)]
Fix memory leak in db2 policy DB initialization
osa_adb_init_db() maintains a static linked list mapping filenames to
lock structures. Entries are never removed from the list; when their
reference counts hit 0, the lockfile is closed but the filename
remains allocated. However, the filename is allocated each time the
lockfile is re-opened, leaking the old value. Fix this leak by moving
filename initialization to entry creation.
Greg Hudson [Mon, 27 Jun 2016 17:13:47 +0000 (13:13 -0400)]
Update libev sources to 4.22
This update fixes a memory leak when freeing null pointers using
ev_realloc_emul(). In 4.04, that function assumed that realloc(x, 0)
is equivalent to free(x) under glibc, but in at least some versions of
glibc, realloc(NULL, 0) behaves like malloc(0) rather than free(NULL)
and allocates memory.
Sarah Day [Tue, 19 Jan 2016 14:50:33 +0000 (09:50 -0500)]
Add unit tests for k5_parse_host_string
Make is_string_numeric() visible outside of parse_host_string.c as
k5_is_string_numeric() so it can be tested. Make
k5_parse_host_string() return an error when address begins with ':',
for consistency with APR's apr_parse_addr_port().
[ghudson@mit.edu: squashed three commits; added t_parse_host_string to
.gitignore and clean rule; clarified commit message]
When encrypted timestamp pre-authentication fails, respond with error
code KDC_ERR_PREAUTH_FAILED, rather than KRB_AP_ERR_BAD_INTEGRITY, for
consistency with other Kerberos implementations.
[ghudson@mit.edu: clarified commit message and comment]
projects / thirdparty / krb5.git / log
