This commit introduces descriptively-named macros for the
identifiers used in wire protocol messages. These new macros are
placed in a new header file so that they can be easily used by
third-party code.
Author: Dave Cramer
Reviewed-by: Alvaro Herrera, Tatsuo Ishii, Peter Smith, Robert Haas, Tom Lane, Peter Eisentraut, Michael Paquier
Discussion: https://postgr.es/m/CADK3HHKbBmK-PKf1bPNFoMC%2BoBt%2BpD9PH8h5nvmBQskEHm-Ehw%40mail.gmail.com
fe-auth.c references CHAR_BIT since commit 3a465cc67, but it
did not #include <limits.h>, which per POSIX is where that
symbol is defined. This escaped notice so far because
(a) on most platforms, <sys/param.h> pulls in <limits.h>,
(b) even if yours doesn't, OpenSSL pulls it in, so compiling
with --with-openssl masks the omission.
Per bug #18026 from Marcel Hofstetter. Back-patch to v16.
Discussion: https://postgr.es/m/18026-d5bb69f79cd16203@postgresql.org
All supported computers have either POSIX or Windows threads, and we no
longer have any automated testing of --disable-thread-safety. We define
a vestigial ENABLE_THREAD_SAFETY macro to 1 in ecpg_config.h in case it
is useful, but we no longer test it anywhere in PostgreSQL code, and
associated dead code paths are removed.
The Meson and perl-based Windows build scripts never had an equivalent
build option.
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/CA%2BhUKGLtmexrpMtxBRLCVePqV_dtWG-ZsEbyPrYc%2BNBB2TkNsw%40mail.gmail.com
Historically this module dealt with thread-safety of system interfaces,
but now all that's left is wrapper code for user name and home directory
lookup. Arguably the Windows variants of this logic could be moved in
here too, to justify its presence under port. For now, just tidy up
some obsolete references to multi-threading, and give the file a
meaningful name.
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/CA%2BhUKGLtmexrpMtxBRLCVePqV_dtWG-ZsEbyPrYc%2BNBB2TkNsw%40mail.gmail.com
This commit comes as a continuation of the discussion that has led to
d522b05, as \v was handled inconsistently when parsing array values or
anything going through the parsers, and changing a parser behavior in
stable branches is a scary thing to do. The parsing of array values now
uses the more central scanner_isspace() and array_isspace() is removed.
As pointing out by Peter Eisentraut, fix a confusing reference to
horizontal space in the parsers with the term "horiz_space". \f was
included in this set since 3cfdd8f from 2000, but it is not horizontal.
"horiz_space" is renamed to "non_newline_space", to refer to all
whitespace characters except newlines.
The changes impact the parsers for the backend, psql, seg, cube, ecpg
and replication commands. Note that JSON should not escape \v, as per
RFC 7159, so these are not touched.
Reviewed-by: Peter Eisentraut, Tom Lane
Discussion: https://postgr.es/m/ZJKcjNwWHHvw9ksQ@paquier.xyz
The following routines are added to libpq:
PGresult *PQclosePrepared(PGconn *conn, const char *stmt);
PGresult *PQclosePortal(PGconn *conn, const char *portal);
int PQsendClosePrepared(PGconn *conn, const char *stmt);
int PQsendClosePortal(PGconn *conn, const char *portal);
The "send" routines are non-blocking versions of the two others.
Close messages are part of the protocol but they did not have a libpq
implementation. And, having these routines is for instance useful with
connection poolers as these can detect more easily Close messages
than DEALLOCATE queries.
The implementation takes advantage of what the Describe routines rely on
for portals and statements. Some regression tests are added in
libpq_pipeline, for the four new routines, by closing portals and
statements created already by the tests.
Author: Jelte Fennema
Reviewed-by: Jian He, Michael Paquier
Discussion: https://postgr.es/m/CAGECzQTb4xFAopAVokudB+L62Kt44mNAL4Z9zZ7UTrs1TRFvWA@mail.gmail.com
Here are some notes about this change:
- As X509_get_signature_nid() should always exist (OpenSSL and
LibreSSL), hence HAVE_X509_GET_SIGNATURE_NID is now gone.
- OPENSSL_API_COMPAT is bumped to 0x10002000L.
- One comment related to 1.0.1e introduced by 74242c2 is removed.
Upstream OpenSSL still provides long-term support for 1.0.2 in a closed
fashion, so removing it is out of scope for a few years, at least.
Reviewed-by: Jacob Champion, Daniel Gustafsson
Discussion: https://postgr.es/m/ZG3JNursG69dz1lr@paquier.xyz
This applies the new error message API from commit 0873b2d354 to the
changes introduced by bbf9c282ce. The latter was committed shortly
after the former, so it probably didn't get the news in time.
Eventually it is likely worth trying to deal with this in a more expansive
way, by generating dependency files generated within the scripts. But it's not
entirely obvious how to do that in perl and is work more suitable for 17
anyway.
Reported-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Reviewed-by: Tristan Partin <tristan@neon.tech>
Discussion: https://postgr.es/m/87v8g7s6bf.fsf@wibble.ilmari.org
That's how other boolean options are handled, so do likewise.
The previous coding with "enable" and "disable" was seemingly
modeled on gssencmode, but that's a three-way flag.
While at it, add PGGSSDELEGATION to the set of environment
variables cleared by pg_regress and Utils.pm.
Abhijit Menon-Sen, per gripe from Alvaro Herrera
Discussion: https://postgr.es/m/20230522091609.nlyuu4nolhycqs2p@alvherre.pgsql
Complete the task begun in 9c0a0e2ed: we don't want to use the
abbreviation "deleg" for GSS delegation in any user-visible places.
(For consistency, this also changes most internal uses too.)
Abhijit Menon-Sen and Tom Lane
Discussion: https://postgr.es/m/949048.1684639317@sss.pgh.pa.us
Run pgindent, pgperltidy, and reformat-dat-files.
This set of diffs is a bit larger than typical. We've updated to
pg_bsd_indent 2.1.2, which properly indents variable declarations that
have multi-line initialization expressions (the continuation lines are
now indented one tab stop). We've also updated to perltidy version
20230309 and changed some of its settings, which reduces its desire to
add whitespace to lines to make assignments etc. line up. Going
forward, that should make for fewer random-seeming changes to existing
code.
Discussion: https://postgr.es/m/20230428092545.qfb3y5wcu4cm75ur@alvherre.pgsql
Commit 6df7a9698b accidentally included two identical prototypes for
default_multirange_selectivi() and commit 086cf1458c added a break;
statement where one was already present, thus duplicating it. While
there is no bug caused by this, fix by removing the duplicated lines
as they provide no value.
Backpatch the fix for duplicate prototypes to v14 and the duplicate
break statement fix to all supported branches to avoid backpatching
hazards due to the removal.
Reported-by: Anton Voloshin <a.voloshin@postgrespro.ru>
Discussion: https://postgr.es/m/0e69cb60-0176-f6d0-7e15-6478b7d85724@postgrespro.ru
The errormessage for an incorrect require_auth method wasn't using the
common "invalid %s value" errormessage which lessens the burden on our
translators. Fix by changing to that format to make use of existing
translations and to make error messages consistent in wording.
Reported and fixed by Gurjeet Singh with some tweaking by myself.
Author: Gurjeet Singh <gurjeet@singh.im>
Discussion: https://postgr.es/m/CABwTF4Xu3g9zohJ9obu8m7MKbf8g63NgpRDjwqPHQgAtB+Gb8Q@mail.gmail.com
The error message for a missing or invalid system CA when using
sslrootcert=system differs based on the OpenSSL version used.
In OpenSSL 1.0.1-3.0 it is reported as SSL Error, with varying
degrees of helpfulness in the error message. With OpenSSL 3.1 it
is reported as an SSL SYSCALL error with "Undefined error" as
the error message. This fix pulls out the particular error in
OpenSSL 3.1 as a certificate verify error in order to help the
user better figure out what happened, and to keep the ssl test
working. While there is no evidence that extracing the errors
will clobber errno, this adds a guard against that regardless
to also make the consistent with how we handle OpenSSL errors
elsewhere. It also memorizes the output from OpenSSL 3.0 in
the test in cases where the system CA isn't responding.
Reported-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/c39be3c5-c1a5-1e33-1024-16f527e251a4@enterprisedb.com
When compiled with -C ORACLE, ecpg_get_data() had a one-off issue where
it would incorrectly store the null terminator byte to str[-1] when
varcharsize is 0, which is something that can happen when using SQLDA.
This would eat 1 byte from the previous field stored, corrupting the
results generated.
All the callers of ecpg_get_data() estimate and allocate enough storage
for the data received, and the fix of this commit relies on this
assumption. Note that this maps to the case where no padding or
truncation is required.
This issue has been introduced by 3b7ab43 with the Oracle compatibility
option, so backpatch down to v11.
Author: Kyotaro Horiguchi
Discussion: https://postgr.es/m/20230410.173500.440060475837236886.horikyota.ntt@gmail.com
Backpatch-through: 11
This fixes many spelling mistakes in comments, but a few references to
invalid parameter names, function names and option names too in comments
and also some in string constants
Also, fix an #undef that was undefining the incorrect definition
Author: Alexander Lakhin
Reviewed-by: Justin Pryzby
Discussion: https://postgr.es/m/d5f68d19-c0fc-91a9-118d-7c6a5a3f5fad@gmail.com
This reverts commit 3d03b24c3 (Revert Add support for Kerberos
credential delegation) which was committed on the grounds of concern
about portability, but on further review and discussion, it's clear that
we are better off explicitly requiring MIT Kerberos as that appears to
be the only GSSAPI library currently that's under proper maintenance
and ongoing development. The API used for storing credentials was added
to MIT Kerberos over a decade ago while for the other libraries which
appear to be mainly based on Heimdal, which exists explicitly to be a
re-implementation of MIT Kerberos, the API never made it to a released
version (even though it was added to the Heimdal git repo over 5 years
ago..).
This post-feature-freeze change was approved by the RMT.
Discussion: https://postgr.es/m/ZDDO6jaESKaBgej0%40tamriel.snowman.net
This reverts commit 3d4fa227bc.
Per discussion and buildfarm, this depends on APIs that seem to not
be available on at least one platform (NetBSD). Should be certainly
possible to rework to be optional on that platform if necessary but bit
late for that at this point.
Discussion: https://postgr.es/m/3286097.1680922218@sss.pgh.pa.us
Support GSSAPI/Kerberos credentials being delegated to the server by a
client. With this, a user authenticating to PostgreSQL using Kerberos
(GSSAPI) credentials can choose to delegate their credentials to the
PostgreSQL server (which can choose to accept them, or not), allowing
the server to then use those delegated credentials to connect to
another service, such as with postgres_fdw or dblink or theoretically
any other service which is able to be authenticated using Kerberos.
Both postgres_fdw and dblink are changed to allow non-superuser
password-less connections but only when GSSAPI credentials have been
delegated to the server by the client and GSSAPI is used to
authenticate to the remote system.
Authors: Stephen Frost, Peifeng Qiu
Reviewed-By: David Christensen
Discussion: https://postgr.es/m/CO1PR05MB8023CC2CB575E0FAAD7DF4F8A8E29@CO1PR05MB8023.namprd05.prod.outlook.com
This adds a new option to libpq's sslrootcert, "system", which will load
the system trusted CA roots for certificate verification. This is a more
convenient way to achieve this than pointing to the system CA roots
manually since the location can differ by installation and be locally
adjusted by env vars in OpenSSL.
When sslrootcert is set to system, sslmode is forced to be verify-full
as weaker modes aren't providing much security for public CAs.
Changing the location of the system roots by setting environment vars is
not supported by LibreSSL so the tests will use a heuristic to determine
if the system being tested is LibreSSL or OpenSSL.
The workaround in .cirrus.yml is required to handle a strange interaction
between homebrew and the openssl@3 formula; hopefully this can be removed
in the near future.
The original patch was written by Thomas Habets, which was later revived
by Jacob Champion.
Author: Jacob Champion <jchampion@timescale.com>
Author: Thomas Habets <thomas@habets.se>
Reviewed-by: Jelte Fennema <postgres@jeltef.nl>
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Reviewed-by: Magnus Hagander <magnus@hagander.net>
Discussion: https://www.postgresql.org/message-id/flat/CA%2BkHd%2BcJwCUxVb-Gj_0ptr3_KZPwi3%2B67vK6HnLFBK9MzuYrLA%40mail.gmail.com
- At the last minute and for no particularly good reason, I changed the
WITHOUT token to be marked especially for lookahead, from the one in
WITHOUT TIME to the one in WITHOUT UNIQUE. Study of upcoming patches
(where a new WITHOUT ARRAY WRAPPER clause is added) showed me that the
former was better, so put it back the way the original patch had it.
- update exprTypmod() for JsonConstructorExpr to return the typmod of
the RETURNING clause, as a comment there suggested. Perhaps it's
possible for this to make a difference with datetime types, but I
didn't try to build a test case.
- The nodeFuncs.c support code for new nodes was calling walker()
directly instead of the WALK() macro as introduced by commit 1c27d16e6e.
Modernize that. Also add exprLocation() support for a couple of nodes
that missed it. Lastly, reorder the code more sensibly.
The WITHOUT_LA -> WITHOUT change means that stored rules containing
either WITHOUT TIME ZONE or WITHOUT UNIQUE KEYS would change
representation. Therefore, bump catversion.
Discussion: https://postgr.es/m/20230329181708.e64g2tpy7jyufqkr@alvherre.pgsql
The fallback seed for when pg_strong_random cannot generate a high
quality seed mixes in the address of the conn object, but the cast
failed to take the word size into consideration. Fix by casting to
a uintptr_t instead. The seed calculation was added in 7f5b19817e.
The code as it stood generated the following warning on mamba and
lapwing in the buildfarm:
fe-connect.c: In function 'libpq_prng_init':
fe-connect.c:1048:11: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
1048 | rseed = ((uint64) conn) ^
| ^
Author: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Discussion: https://postgr.es/m/TYAPR01MB58665250EDCD551CCA9AD117F58E9@TYAPR01MB5866.jpnprd01.prod.outlook.com
This adds support for load balancing connections with libpq using a
connection parameter: load_balance_hosts=<string>. When setting the
param to random, hosts and addresses will be connected to in random
order. This then results in load balancing across these addresses and
hosts when multiple clients or frequent connection setups are used.
The randomization employed performs two levels of shuffling:
1. The given hosts are randomly shuffled, before resolving them
one-by-one.
2. Once a host its addresses get resolved, the returned addresses
are shuffled, before trying to connect to them one-by-one.
Author: Jelte Fennema <postgres@jeltef.nl>
Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Reviewed-by: Michael Banck <mbanck@gmx.net>
Reviewed-by: Andrey Borodin <amborodin86@gmail.com>
Discussion: https://postgr.es/m/PR3PR83MB04768E2FF04818EEB2179949F7A69@PR3PR83MB0476.EURPRD83.prod.outlook.
Replace the hardcoded value with a GUC such that the iteration
count can be raised in order to increase protection against
brute-force attacks. The hardcoded value for SCRAM iteration
count was defined to be 4096, which is taken from RFC 7677, so
set the default for the GUC to 4096 to match. In RFC 7677 the
recommendation is at least 15000 iterations but 4096 is listed
as a SHOULD requirement given that it's estimated to yield a
0.5s processing time on a mobile handset of the time of RFC
writing (late 2015).
Raising the iteration count of SCRAM will make stored passwords
more resilient to brute-force attacks at a higher computational
cost during connection establishment. Lowering the count will
reduce computational overhead during connections at the tradeoff
of reducing strength against brute-force attacks.
There are however platforms where even a modest iteration count
yields a too high computational overhead, with weaker password
encryption schemes chosen as a result. In these situations,
SCRAM with a very low iteration count still gives benefits over
weaker schemes like md5, so we allow the iteration count to be
set to one at the low end.
The new GUC is intentionally generically named such that it can
be made to support future SCRAM standards should they emerge.
At that point the value can be made into key:value pairs with
an undefined key as a default which will be backwards compatible
with this.
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Jonathan S. Katz <jkatz@postgresql.org>
Discussion: https://postgr.es/m/F72E7BC7-189F-4B17-BF47-9735EB72C364@yesql.se
The sslcertmode option controls whether the server is allowed and/or
required to request a certificate from the client. There are three
modes:
- "allow" is the default and follows the current behavior, where a
configured client certificate is sent if the server requests one
(via one of its default locations or sslcert). With the current
implementation, will happen whenever TLS is negotiated.
- "disable" causes the client to refuse to send a client certificate
even if sslcert is configured or if a client certificate is available in
one of its default locations.
- "require" causes the client to fail if a client certificate is never
sent and the server opens a connection anyway. This doesn't add any
additional security, since there is no guarantee that the server is
validating the certificate correctly, but it may helpful to troubleshoot
more complicated TLS setups.
sslcertmode=require requires SSL_CTX_set_cert_cb(), available since
OpenSSL 1.0.2. Note that LibreSSL does not include it.
Using a connection parameter different than require_auth has come up as
the simplest design because certificate authentication does not rely
directly on any of the AUTH_REQ_* codes, and one may want to require a
certificate to be sent in combination of a given authentication method,
like SCRAM-SHA-256.
TAP tests are added in src/test/ssl/, some of them relying on sslinfo to
check if a certificate has been set. These are compatible across all
the versions of OpenSSL supported on HEAD (currently down to 1.0.1).
Author: Jacob Champion
Reviewed-by: Aleksander Alekseev, Peter Eisentraut, David G. Johnston,
Michael Paquier
Discussion: https://postgr.es/m/9e5a8ccddb8355ea9fa4b75a1e3a9edc88a70cd3.camel@vmware.com
The same error message will be used for a different option, to be
introduced in a separate patch. Reshaping the error message as done
here saves in translation.
Extracted from a larger patch by the same author.
Author: Jacob Champion
Discussion: https://postgr.es/m/9e5a8ccddb8355ea9fa4b75a1e3a9edc88a70cd3.camel@vmware.com
Since commit 7627b91cd5, libpq has used FD_CLOEXEC so that sockets
wouldn't be leaked to subprograms. With enough bad luck, a
multi-threaded program might fork in between the socket() and fcntl()
calls. We can close that tiny gap by using SOCK_CLOEXEC instead of a
separate call. While here, we might as well do the same for
SOCK_NONBLOCK, to save another syscall.
These flags are expected to appear in the next revision of the POSIX
standard, specifically to address this problem. Our Unixoid targets
except macOS and AIX have had them for a long time, and macOS would
hopefully use guarded availability to roll them out, so it seems enough
to use a simple ifdef test for availability until we hear otherwise.
Windows doesn't have them, but has non-inheritable sockets by default.
Discussion: https://postgr.es/m/CA%2BhUKGKb6FsAdQWcRL35KJsftv%2B9zXqQbzwkfRf1i0J2e57%2BhQ%40mail.gmail.com
Support for SCM credential authentication has been removed in the
backend in 9.1, and libpq has kept some code to handle it for
compatibility.
Commit be4585b, that did the cleanup of the backend code, has done
so because the code was not really portable originally. And, as there
are likely little chances that this is used these days, this removes the
remaining code from libpq. An error will now be raised by libpq if
attempting to connect to a server that returns AUTH_REQ_SCM_CREDS,
instead.
References to SCM credential authentication are removed from the
protocol documentation. This removes some meson and configure checks.
Author: Michael Paquier
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/ZBLH8a4otfqgd6Kn@paquier.xyz
In the .pc (pkg-config) files generated by the make and meson builds,
the Requires.private entries use different delimiters. The make build
uses spaces, the meson build uses commas. The pkg-config documentation
says that it should be comma-separated, but apparently about half the
.pc in the wild use just spaces. The pkg-config source code
acknowledges that both commas and spaces work.
This changes the make build to use commas, for consistency.
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://www.postgresql.org/message-id/flat/1fb52d61-0964-2d8e-87d9-e8be830e2b24%40enterprisedb.com
The new connection parameter require_auth allows a libpq client to
define a list of comma-separated acceptable authentication types for use
with the server. There is no negotiation: if the server does not
present one of the allowed authentication requests, the connection
attempt done by the client fails.
The following keywords can be defined in the list:
- password, for AUTH_REQ_PASSWORD.
- md5, for AUTH_REQ_MD5.
- gss, for AUTH_REQ_GSS[_CONT].
- sspi, for AUTH_REQ_SSPI and AUTH_REQ_GSS_CONT.
- scram-sha-256, for AUTH_REQ_SASL[_CONT|_FIN].
- creds, for AUTH_REQ_SCM_CREDS (perhaps this should be removed entirely
now).
- none, to control unauthenticated connections.
All the methods that can be defined in the list can be negated, like
"!password", in which case the server must NOT use the listed
authentication type. The special method "none" allows/disallows the use
of unauthenticated connections (but it does not govern transport-level
authentication via TLS or GSSAPI).
Internally, the patch logic is tied to check_expected_areq(), that was
used for channel_binding, ensuring that an incoming request is
compatible with conn->require_auth. It also introduces a new flag,
conn->client_finished_auth, which is set by various authentication
routines when the client side of the handshake is finished. This
signals to check_expected_areq() that an AUTH_REQ_OK from the server is
expected, and allows the client to complain if the server bypasses
authentication entirely, with for example the reception of a too-early
AUTH_REQ_OK message.
Regression tests are added in authentication TAP tests for all the
keywords supported (except "creds", because it is around only for
compatibility reasons). A new TAP script has been added for SSPI, as
there was no script dedicated to it yet. It relies on SSPI being the
default authentication method on Windows, as set by pg_regress.
Author: Jacob Champion
Reviewed-by: Peter Eisentraut, David G. Johnston, Michael Paquier
Discussion: https://postgr.es/m/9e5a8ccddb8355ea9fa4b75a1e3a9edc88a70cd3.camel@vmware.com
