Greetings, * Jonathan S. Katz (jk...@postgresql.org) wrote: > On 4/10/23 11:37 AM, Tom Lane wrote: > > Stephen Frost <sfr...@snowman.net> writes: > > > * Tom Lane (t...@sss.pgh.pa.us) wrote: > > > > IOW, maybe it'd be okay to de-revert 3d4fa227b and add documentation > > > > saying that --with-gssapi requires MIT Kerberos not Heimdal. > > > > > I'd be happy with that and can add the appropriate documentation noting > > > that we require MIT Kerberos. Presumably the appropriate step at this > > > point would be to check with the RMT? > > > > Yeah, RMT would have final say at this stage. > > > > If you pull the trigger, a note to buildfarm-members would be > > appropriate too, so people will know if they need to remove > > --with-gssapi from animal configurations. > > The RMT discussed this thread and agrees to a "de-revert" of the "Add > support for Kerberos delegation" patch, provided that: > > 1. The appropriate documentation is added AND > 2. The de-revert occurs no later than 2023-04-15 (upper bound 2023-04-16 > 0:00 AoE). > > There's an open item[1] for this task.
Understood. Please find attached the updated patch with changes to the commit message to indicate that we now require MIT Kerberos, an additional explicit check for gssapi_ext.h in configure.ac/configure, along with updated documentation explicitly saying we require MIT Kerberos for GSSAPI support. I'll plan to push this tomorrow. Of course, suggestions/improvements on documentation or anything else always welcome. Thanks all! Stephen
From c485794516e9aea2274d8c2c782945d4a10e33bb Mon Sep 17 00:00:00 2001 From: Stephen Frost <sfr...@snowman.net> Date: Sat, 8 Apr 2023 08:08:19 -0400 Subject: [PATCH] Add support for Kerberos credential delegation 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. As part of this, we now require MIT Kerberos when building with support for GSSAPI. Authors: Stephen Frost, Peifeng Qiu Reviewed-By: David Christensen Discussion: https://postgr.es/m/co1pr05mb8023cc2cb575e0faad7df4f8a8...@co1pr05mb8023.namprd05.prod.outlook.com --- configure | 27 ++ configure.ac | 2 + contrib/dblink/dblink.c | 127 ++++--- contrib/dblink/expected/dblink.out | 4 +- contrib/postgres_fdw/connection.c | 72 +++- .../postgres_fdw/expected/postgres_fdw.out | 19 +- contrib/postgres_fdw/option.c | 6 + contrib/postgres_fdw/sql/postgres_fdw.sql | 3 +- doc/src/sgml/config.sgml | 17 + doc/src/sgml/dblink.sgml | 5 +- doc/src/sgml/installation.sgml | 15 +- doc/src/sgml/libpq.sgml | 41 +++ doc/src/sgml/monitoring.sgml | 9 + doc/src/sgml/postgres-fdw.sgml | 7 +- src/backend/catalog/system_views.sql | 3 +- src/backend/foreign/foreign.c | 1 + src/backend/libpq/auth.c | 13 +- src/backend/libpq/be-gssapi-common.c | 53 +++ src/backend/libpq/be-secure-gssapi.c | 26 +- src/backend/utils/activity/backend_status.c | 1 + src/backend/utils/adt/pgstatfuncs.c | 21 +- src/backend/utils/init/postinit.c | 8 +- src/backend/utils/misc/guc_tables.c | 10 + src/backend/utils/misc/postgresql.conf.sample | 1 + src/include/catalog/pg_proc.dat | 6 +- src/include/libpq/auth.h | 1 + src/include/libpq/be-gssapi-common.h | 3 + src/include/libpq/libpq-be.h | 2 + src/include/utils/backend_status.h | 1 + src/interfaces/libpq/exports.txt | 1 + src/interfaces/libpq/fe-auth.c | 15 +- src/interfaces/libpq/fe-connect.c | 17 + src/interfaces/libpq/fe-secure-gssapi.c | 23 +- src/interfaces/libpq/libpq-fe.h | 1 + src/interfaces/libpq/libpq-int.h | 2 + src/test/kerberos/Makefile | 3 + src/test/kerberos/t/001_auth.pl | 331 ++++++++++++++++-- src/test/perl/PostgreSQL/Test/Utils.pm | 27 ++ src/test/regress/expected/rules.out | 11 +- 39 files changed, 792 insertions(+), 143 deletions(-) diff --git a/configure b/configure index dbea7eaf5f..08bcf8f43a 100755 --- a/configure +++ b/configure @@ -14104,6 +14104,33 @@ done fi +done + + for ac_header in gssapi/gssapi_ext.h +do : + ac_fn_c_check_header_mongrel "$LINENO" "gssapi/gssapi_ext.h" "ac_cv_header_gssapi_gssapi_ext_h" "$ac_includes_default" +if test "x$ac_cv_header_gssapi_gssapi_ext_h" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_GSSAPI_GSSAPI_EXT_H 1 +_ACEOF + +else + for ac_header in gssapi_ext.h +do : + ac_fn_c_check_header_mongrel "$LINENO" "gssapi_ext.h" "ac_cv_header_gssapi_ext_h" "$ac_includes_default" +if test "x$ac_cv_header_gssapi_ext_h" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_GSSAPI_EXT_H 1 +_ACEOF + +else + as_fn_error $? "gssapi_ext.h header file is required for GSSAPI" "$LINENO" 5 +fi + +done + +fi + done fi diff --git a/configure.ac b/configure.ac index dda34304db..c53a9c788e 100644 --- a/configure.ac +++ b/configure.ac @@ -1562,6 +1562,8 @@ fi if test "$with_gssapi" = yes ; then AC_CHECK_HEADERS(gssapi/gssapi.h, [], [AC_CHECK_HEADERS(gssapi.h, [], [AC_MSG_ERROR([gssapi.h header file is required for GSSAPI])])]) + AC_CHECK_HEADERS(gssapi/gssapi_ext.h, [], + [AC_CHECK_HEADERS(gssapi_ext.h, [], [AC_MSG_ERROR([gssapi_ext.h header file is required for GSSAPI])])]) fi PGAC_PATH_PROGS(OPENSSL, openssl) diff --git a/contrib/dblink/dblink.c b/contrib/dblink/dblink.c index 78a8bcee6e..55f75eff36 100644 --- a/contrib/dblink/dblink.c +++ b/contrib/dblink/dblink.c @@ -48,6 +48,7 @@ #include "funcapi.h" #include "lib/stringinfo.h" #include "libpq-fe.h" +#include "libpq/libpq-be.h" #include "libpq/libpq-be-fe-helpers.h" #include "mb/pg_wchar.h" #include "miscadmin.h" @@ -111,7 +112,8 @@ static HeapTuple get_tuple_of_interest(Relation rel, int *pkattnums, int pknumat static Relation get_rel_from_relname(text *relname_text, LOCKMODE lockmode, AclMode aclmode); static char *generate_relation_name(Relation rel); static void dblink_connstr_check(const char *connstr); -static void dblink_security_check(PGconn *conn, remoteConn *rconn); +static bool dblink_connstr_has_pw(const char *connstr); +static void dblink_security_check(PGconn *conn, remoteConn *rconn, const char *connstr); static void dblink_res_error(PGconn *conn, const char *conname, PGresult *res, bool fail, const char *fmt,...) pg_attribute_printf(5, 6); static char *get_connect_string(const char *servername); @@ -213,7 +215,7 @@ dblink_get_conn(char *conname_or_str, errmsg("could not establish connection"), errdetail_internal("%s", msg))); } - dblink_security_check(conn, rconn); + dblink_security_check(conn, rconn, connstr); if (PQclientEncoding(conn) != GetDatabaseEncoding()) PQsetClientEncoding(conn, GetDatabaseEncodingName()); freeconn = true; @@ -307,7 +309,7 @@ dblink_connect(PG_FUNCTION_ARGS) } /* check password actually used if not superuser */ - dblink_security_check(conn, rconn); + dblink_security_check(conn, rconn, connstr); /* attempt to set client encoding to match server encoding, if needed */ if (PQclientEncoding(conn) != GetDatabaseEncoding()) @@ -2584,64 +2586,99 @@ deleteConnection(const char *name) errmsg("undefined connection name"))); } +/* + * We need to make sure that the connection made used credentials + * which were provided by the user, so check what credentials were + * used to connect and then make sure that they came from the user. + */ static void -dblink_security_check(PGconn *conn, remoteConn *rconn) +dblink_security_check(PGconn *conn, remoteConn *rconn, const char *connstr) { - if (!superuser()) - { - if (!PQconnectionUsedPassword(conn)) - { - libpqsrv_disconnect(conn); - if (rconn) - pfree(rconn); + /* Superuser bypasses security check */ + if (superuser()) + return; - ereport(ERROR, - (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), - errmsg("password is required"), - errdetail("Non-superuser cannot connect if the server does not request a password."), - errhint("Target server's authentication method must be changed."))); - } - } + /* If password was used to connect, make sure it was one provided */ + if (PQconnectionUsedPassword(conn) && dblink_connstr_has_pw(connstr)) + return; + +#ifdef ENABLE_GSS + /* If GSSAPI creds used to connect, make sure it was one delegated */ + if (PQconnectionUsedGSSAPI(conn) && be_gssapi_get_deleg(MyProcPort)) + return; +#endif + + /* Otherwise, fail out */ + libpqsrv_disconnect(conn); + if (rconn) + pfree(rconn); + + ereport(ERROR, + (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), + errmsg("password or GSSAPI delegated credentials required"), + errdetail("Non-superusers may only connect using credentials they provide, eg: password in connection string or delegated GSSAPI credentials"), + errhint("Ensure provided credentials match target server's authentication method."))); } /* - * For non-superusers, insist that the connstr specify a password. This - * prevents a password from being picked up from .pgpass, a service file, - * the environment, etc. We don't want the postgres user's passwords - * to be accessible to non-superusers. + * Function to check if the connection string includes an explicit + * password, needed to ensure that non-superuser password-based auth + * is using a provided password and not one picked up from the + * environment. */ -static void -dblink_connstr_check(const char *connstr) +static bool +dblink_connstr_has_pw(const char *connstr) { - if (!superuser()) - { - PQconninfoOption *options; - PQconninfoOption *option; - bool connstr_gives_password = false; + PQconninfoOption *options; + PQconninfoOption *option; + bool connstr_gives_password = false; - options = PQconninfoParse(connstr, NULL); - if (options) + options = PQconninfoParse(connstr, NULL); + if (options) + { + for (option = options; option->keyword != NULL; option++) { - for (option = options; option->keyword != NULL; option++) + if (strcmp(option->keyword, "password") == 0) { - if (strcmp(option->keyword, "password") == 0) + if (option->val != NULL && option->val[0] != '\0') { - if (option->val != NULL && option->val[0] != '\0') - { - connstr_gives_password = true; - break; - } + connstr_gives_password = true; + break; } } - PQconninfoFree(options); } - - if (!connstr_gives_password) - ereport(ERROR, - (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), - errmsg("password is required"), - errdetail("Non-superusers must provide a password in the connection string."))); + PQconninfoFree(options); } + + return connstr_gives_password; +} + +/* + * For non-superusers, insist that the connstr specify a password, except + * if GSSAPI credentials have been delegated (and we check that they are used + * for the connection in dblink_security_check later). This prevents a + * password or GSSAPI credentials from being picked up from .pgpass, a + * service file, the environment, etc. We don't want the postgres user's + * passwords or Kerberos credentials to be accessible to non-superusers. + */ +static void +dblink_connstr_check(const char *connstr) +{ + if (superuser()) + return; + + if (dblink_connstr_has_pw(connstr)) + return; + +#ifdef ENABLE_GSS + if (be_gssapi_get_deleg(MyProcPort)) + return; +#endif + + ereport(ERROR, + (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), + errmsg("password or GSSAPI delegated credentials required"), + errdetail("Non-superusers must provide a password in the connection string or send delegated GSSAPI credentials."))); } /* diff --git a/contrib/dblink/expected/dblink.out b/contrib/dblink/expected/dblink.out index 0f5050b409..7809f58d96 100644 --- a/contrib/dblink/expected/dblink.out +++ b/contrib/dblink/expected/dblink.out @@ -903,8 +903,8 @@ GRANT EXECUTE ON FUNCTION dblink_connect_u(text, text) TO regress_dblink_user; SET SESSION AUTHORIZATION regress_dblink_user; -- should fail SELECT dblink_connect('myconn', 'fdtest'); -ERROR: password is required -DETAIL: Non-superusers must provide a password in the connection string. +ERROR: password or GSSAPI delegated credentials required +DETAIL: Non-superusers must provide a password in the connection string or send delegated GSSAPI credentials. -- should succeed SELECT dblink_connect_u('myconn', 'fdtest'); dblink_connect_u diff --git a/contrib/postgres_fdw/connection.c b/contrib/postgres_fdw/connection.c index 2969351e9a..75d93d6ead 100644 --- a/contrib/postgres_fdw/connection.c +++ b/contrib/postgres_fdw/connection.c @@ -17,6 +17,7 @@ #include "catalog/pg_user_mapping.h" #include "commands/defrem.h" #include "funcapi.h" +#include "libpq/libpq-be.h" #include "libpq/libpq-be-fe-helpers.h" #include "mb/pg_wchar.h" #include "miscadmin.h" @@ -149,6 +150,8 @@ static void pgfdw_finish_pre_subcommit_cleanup(List *pending_entries, static void pgfdw_finish_abort_cleanup(List *pending_entries, List *cancel_requested, bool toplevel); +static void pgfdw_security_check(const char **keywords, const char **values, + UserMapping *user, PGconn *conn); static bool UserMappingPasswordRequired(UserMapping *user); static bool disconnect_cached_connections(Oid serverid); @@ -384,6 +387,47 @@ make_new_connection(ConnCacheEntry *entry, UserMapping *user) entry->conn, server->servername, user->umid, user->userid); } +/* + * Check that non-superuser has used password or delegated credentials + * to establish connection; otherwise, he's piggybacking on the + * postgres server's user identity. See also dblink_security_check() + * in contrib/dblink and check_conn_params. + */ +static void +pgfdw_security_check(const char **keywords, const char **values, UserMapping *user, PGconn *conn) +{ + /* Superusers bypass the check */ + if (superuser_arg(user->userid)) + return; + +#ifdef ENABLE_GSS + /* Connected via GSSAPI with delegated credentials- all good. */ + if (PQconnectionUsedGSSAPI(conn) && be_gssapi_get_deleg(MyProcPort)) + return; +#endif + + /* Ok if superuser set PW required false. */ + if (!UserMappingPasswordRequired(user)) + return; + + /* Connected via PW, with PW required true, and provided non-empty PW. */ + if (PQconnectionUsedPassword(conn)) + { + /* ok if params contain a non-empty password */ + for (int i = 0; keywords[i] != NULL; i++) + { + if (strcmp(keywords[i], "password") == 0 && values[i][0] != '\0') + return; + } + } + + ereport(ERROR, + (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), + errmsg("password or GSSAPI delegated credentials required"), + errdetail("Non-superuser cannot connect if the server does not request a password or use GSSAPI with delegated credentials."), + errhint("Target server's authentication method must be changed or password_required=false set in the user mapping attributes."))); +} + /* * Connect to remote server using specified server and user mapping properties. */ @@ -495,19 +539,8 @@ connect_pg_server(ForeignServer *server, UserMapping *user) server->servername), errdetail_internal("%s", pchomp(PQerrorMessage(conn))))); - /* - * Check that non-superuser has used password to establish connection; - * otherwise, he's piggybacking on the postgres server's user - * identity. See also dblink_security_check() in contrib/dblink and - * check_conn_params. - */ - if (!superuser_arg(user->userid) && UserMappingPasswordRequired(user) && - !PQconnectionUsedPassword(conn)) - ereport(ERROR, - (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), - errmsg("password is required"), - errdetail("Non-superuser cannot connect if the server does not request a password."), - errhint("Target server's authentication method must be changed or password_required=false set in the user mapping attributes."))); + /* Perform post-connection security checks */ + pgfdw_security_check(keywords, values, user, conn); /* Prepare new session for use */ configure_remote_session(conn); @@ -561,7 +594,8 @@ UserMappingPasswordRequired(UserMapping *user) } /* - * For non-superusers, insist that the connstr specify a password. This + * For non-superusers, insist that the connstr specify a password or that the + * user provided their own GSSAPI delegated credentials. This * prevents a password from being picked up from .pgpass, a service file, the * environment, etc. We don't want the postgres user's passwords, * certificates, etc to be accessible to non-superusers. (See also @@ -576,6 +610,12 @@ check_conn_params(const char **keywords, const char **values, UserMapping *user) if (superuser_arg(user->userid)) return; +#ifdef ENABLE_GSS + /* ok if the user provided their own delegated credentials */ + if (be_gssapi_get_deleg(MyProcPort)) + return; +#endif + /* ok if params contain a non-empty password */ for (i = 0; keywords[i] != NULL; i++) { @@ -589,8 +629,8 @@ check_conn_params(const char **keywords, const char **values, UserMapping *user) ereport(ERROR, (errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED), - errmsg("password is required"), - errdetail("Non-superusers must provide a password in the user mapping."))); + errmsg("password or GSSAPI delegated credentials required"), + errdetail("Non-superusers must delegate GSSAPI credentials or provide a password in the user mapping."))); } /* diff --git a/contrib/postgres_fdw/expected/postgres_fdw.out b/contrib/postgres_fdw/expected/postgres_fdw.out index 8f6a04f71b..fd5752bd5b 100644 --- a/contrib/postgres_fdw/expected/postgres_fdw.out +++ b/contrib/postgres_fdw/expected/postgres_fdw.out @@ -171,7 +171,8 @@ ALTER SERVER testserver1 OPTIONS ( sslcrl 'value', --requirepeer 'value', krbsrvname 'value', - gsslib 'value' + gsslib 'value', + gssdeleg 'value' --replication 'value' ); -- Error, invalid list syntax @@ -9840,8 +9841,8 @@ CREATE FOREIGN TABLE pg_temp.ft1_nopw ( c8 user_enum ) SERVER loopback_nopw OPTIONS (schema_name 'public', table_name 'ft1'); SELECT 1 FROM ft1_nopw LIMIT 1; -ERROR: password is required -DETAIL: Non-superusers must provide a password in the user mapping. +ERROR: password or GSSAPI delegated credentials required +DETAIL: Non-superusers must delegate GSSAPI credentials or provide a password in the user mapping. -- If we add a password to the connstr it'll fail, because we don't allow passwords -- in connstrs only in user mappings. ALTER SERVER loopback_nopw OPTIONS (ADD password 'dummypw'); @@ -9853,16 +9854,16 @@ HINT: Perhaps you meant the option "passfile". -- This won't work with installcheck, but neither will most of the FDW checks. ALTER USER MAPPING FOR CURRENT_USER SERVER loopback_nopw OPTIONS (ADD password 'dummypw'); SELECT 1 FROM ft1_nopw LIMIT 1; -ERROR: password is required -DETAIL: Non-superuser cannot connect if the server does not request a password. +ERROR: password or GSSAPI delegated credentials required +DETAIL: Non-superuser cannot connect if the server does not request a password or use GSSAPI with delegated credentials. HINT: Target server's authentication method must be changed or password_required=false set in the user mapping attributes. -- Unpriv user cannot make the mapping passwordless ALTER USER MAPPING FOR CURRENT_USER SERVER loopback_nopw OPTIONS (ADD password_required 'false'); ERROR: password_required=false is superuser-only HINT: User mappings with the password_required option set to false may only be created or modified by the superuser. SELECT 1 FROM ft1_nopw LIMIT 1; -ERROR: password is required -DETAIL: Non-superuser cannot connect if the server does not request a password. +ERROR: password or GSSAPI delegated credentials required +DETAIL: Non-superuser cannot connect if the server does not request a password or use GSSAPI with delegated credentials. HINT: Target server's authentication method must be changed or password_required=false set in the user mapping attributes. RESET ROLE; -- But the superuser can @@ -9890,8 +9891,8 @@ DROP USER MAPPING FOR CURRENT_USER SERVER loopback_nopw; -- This will fail again as it'll resolve the user mapping for public, which -- lacks password_required=false SELECT 1 FROM ft1_nopw LIMIT 1; -ERROR: password is required -DETAIL: Non-superusers must provide a password in the user mapping. +ERROR: password or GSSAPI delegated credentials required +DETAIL: Non-superusers must delegate GSSAPI credentials or provide a password in the user mapping. RESET ROLE; -- The user mapping for public is passwordless and lacks the password_required=false -- mapping option, but will work because the current user is a superuser. diff --git a/contrib/postgres_fdw/option.c b/contrib/postgres_fdw/option.c index 4229d2048c..fe40d50c6d 100644 --- a/contrib/postgres_fdw/option.c +++ b/contrib/postgres_fdw/option.c @@ -288,6 +288,12 @@ InitPgFdwOptions(void) {"sslcert", UserMappingRelationId, true}, {"sslkey", UserMappingRelationId, true}, + /* + * gssdeleg is also a libpq option but should be allowed in a user + * mapping context too + */ + {"gssdeleg", UserMappingRelationId, true}, + {NULL, InvalidOid, false} }; diff --git a/contrib/postgres_fdw/sql/postgres_fdw.sql b/contrib/postgres_fdw/sql/postgres_fdw.sql index 5bd69339df..c05046f867 100644 --- a/contrib/postgres_fdw/sql/postgres_fdw.sql +++ b/contrib/postgres_fdw/sql/postgres_fdw.sql @@ -185,7 +185,8 @@ ALTER SERVER testserver1 OPTIONS ( sslcrl 'value', --requirepeer 'value', krbsrvname 'value', - gsslib 'value' + gsslib 'value', + gssdeleg 'value' --replication 'value' ); diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index f81c2045ec..091a79d4f3 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -1190,6 +1190,23 @@ include_dir 'conf.d' </listitem> </varlistentry> + <varlistentry id="guc-gss-accept-deleg" xreflabel="gss_accept_deleg"> + <term><varname>gss_accept_deleg</varname> (<type>boolean</type>) + <indexterm> + <primary><varname>gss_accept_deleg</varname> configuration parameter</primary> + </indexterm> + </term> + <listitem> + <para> + Sets whether GSSAPI delegation should be accepted from the client. + The default is <literal>off</literal> meaning credentials from the client will + NOT be accepted. Changing this to <literal>on</literal> will make the server + accept credentials delegated to it from the client. This parameter can only be + set in the <filename>postgresql.conf</filename> file or on the server command line. + </para> + </listitem> + </varlistentry> + <varlistentry id="guc-db-user-namespace" xreflabel="db_user_namespace"> <term><varname>db_user_namespace</varname> (<type>boolean</type>) <indexterm> diff --git a/doc/src/sgml/dblink.sgml b/doc/src/sgml/dblink.sgml index 17f9d99b1c..7d25f24f49 100644 --- a/doc/src/sgml/dblink.sgml +++ b/doc/src/sgml/dblink.sgml @@ -117,8 +117,9 @@ dblink_connect(text connname, text connstr) returns text <para> Only superusers may use <function>dblink_connect</function> to create - non-password-authenticated connections. If non-superusers need this - capability, use <function>dblink_connect_u</function> instead. + non-password-authenticated and non-GSSAPI-authenticated connections. + If non-superusers need this capability, use + <function>dblink_connect_u</function> instead. </para> <para> diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml index f451204854..ff89bd5f6d 100644 --- a/doc/src/sgml/installation.sgml +++ b/doc/src/sgml/installation.sgml @@ -1048,9 +1048,9 @@ build-postgresql: <term><option>--with-gssapi</option></term> <listitem> <para> - Build with support for GSSAPI authentication. On many systems, the - GSSAPI system (usually a part of the Kerberos installation) is not - installed in a location + Build with support for GSSAPI authentication. MIT Kerberos is required + to be installed for GSSAPI. On many systems, the GSSAPI system (a part + of the MIT Kerberos installation) is not installed in a location that is searched by default (e.g., <filename>/usr/include</filename>, <filename>/usr/lib</filename>), so you must use the options <option>--with-includes</option> and <option>--with-libraries</option> in @@ -2497,10 +2497,11 @@ ninja install <term><option>-Dgssapi={ auto | enabled | disabled }</option></term> <listitem> <para> - Build with support for GSSAPI authentication. On many systems, the - GSSAPI system (usually a part of the Kerberos installation) is not - installed in a location that is searched by default (e.g., - <filename>/usr/include</filename>, <filename>/usr/lib</filename>). In + Build with support for GSSAPI authentication. MIT Kerberos is required + to be installed for GSSAPI. On many systems, the GSSAPI system (a part + of the MIT Kerberos installation) is not installed in a location + that is searched by default (e.g., <filename>/usr/include</filename>, + <filename>/usr/lib</filename>). In those cases, PostgreSQL will query <command>pkg-config</command> to detect the required compiler and linker options. Defaults to auto. <filename>meson configure</filename> will check for the required diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml index faa8aa3187..b8702284d0 100644 --- a/doc/src/sgml/libpq.sgml +++ b/doc/src/sgml/libpq.sgml @@ -2054,6 +2054,18 @@ postgresql://%2Fvar%2Flib%2Fpostgresql/dbname </listitem> </varlistentry> + <varlistentry id="libpq-connect-gssdeleg" xreflabel="gssdeleg"> + <term><literal>gssdeleg</literal></term> + <listitem> + <para> + Forward (delegate) GSS credentials to the server. The default is + <literal>disable</literal> which means credentials will not be forwarded + to the server. Set this to <literal>enable</literal> to have + credentials forwarded when possible. + </para> + </listitem> + </varlistentry> + <varlistentry id="libpq-connect-service" xreflabel="service"> <term><literal>service</literal></term> <listitem> @@ -2715,6 +2727,25 @@ int PQconnectionUsedPassword(const PGconn *conn); </para> </listitem> </varlistentry> + + <varlistentry id="libpq-PQconnectionUsedGSSAPI"> + <term><function>PQconnectionUsedGSSAPI</function><indexterm><primary>PQconnectionUsedGSSAPI</primary></indexterm></term> + <listitem> + <para> + Returns true (1) if the connection authentication method + used GSSAPI. Returns false (0) if not. + +<synopsis> +int PQconnectionUsedGSSAPI(const PGconn *conn); +</synopsis> + </para> + + <para> + This function can be applied to detect whether the connection was + authenticated with GSSAPI. + </para> + </listitem> + </varlistentry> </variablelist> </para> @@ -8237,6 +8268,16 @@ myEventProc(PGEventId evtId, void *evtInfo, void *passThrough) </para> </listitem> + <listitem> + <para> + <indexterm> + <primary><envar>PGGSSDELEG</envar></primary> + </indexterm> + <envar>PGGSSDELEG</envar> behaves the same as the <xref + linkend="libpq-connect-gssdeleg"/> connection parameter. + </para> + </listitem> + <listitem> <para> <indexterm> diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml index 3f33a1c56c..e8ab803267 100644 --- a/doc/src/sgml/monitoring.sgml +++ b/doc/src/sgml/monitoring.sgml @@ -3573,6 +3573,15 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i True if GSSAPI encryption is in use on this connection </para></entry> </row> + + <row> + <entry role="catalog_table_entry"><para role="column_definition"> + <structfield>credentials_delegated</structfield> <type>boolean</type> + </para> + <para> + True if GSSAPI credentials were delegated on this connection. + </para></entry> + </row> </tbody> </tgroup> </table> diff --git a/doc/src/sgml/postgres-fdw.sgml b/doc/src/sgml/postgres-fdw.sgml index 9e66987cf7..281966f16f 100644 --- a/doc/src/sgml/postgres-fdw.sgml +++ b/doc/src/sgml/postgres-fdw.sgml @@ -169,9 +169,10 @@ <literal>sslcert</literal> or <literal>sslkey</literal> settings. </para> <para> - Only superusers may connect to foreign servers without password - authentication, so always specify the <literal>password</literal> option - for user mappings belonging to non-superusers. + Non-superusers may connect to foreign servers using password + authentication or with GSSAPI delegated credentials, so specify the + <literal>password</literal> option for user mappings belonging to + non-superusers where password authentication is required. </para> <para> A superuser may override this check on a per-user-mapping basis by setting diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql index 701c340fc4..2129c916aa 100644 --- a/src/backend/catalog/system_views.sql +++ b/src/backend/catalog/system_views.sql @@ -979,7 +979,8 @@ CREATE VIEW pg_stat_gssapi AS S.pid, S.gss_auth AS gss_authenticated, S.gss_princ AS principal, - S.gss_enc AS encrypted + S.gss_enc AS encrypted, + S.gss_deleg AS credentials_delegated FROM pg_stat_get_activity(NULL) AS S WHERE S.client_port IS NOT NULL; diff --git a/src/backend/foreign/foreign.c b/src/backend/foreign/foreign.c index dca02271dc..6e1977fa62 100644 --- a/src/backend/foreign/foreign.c +++ b/src/backend/foreign/foreign.c @@ -574,6 +574,7 @@ static const struct ConnectionOption libpq_conninfo_options[] = { {"requiressl", ForeignServerRelationId}, {"sslmode", ForeignServerRelationId}, {"gsslib", ForeignServerRelationId}, + {"gssdeleg", ForeignServerRelationId}, {NULL, InvalidOid} }; diff --git a/src/backend/libpq/auth.c b/src/backend/libpq/auth.c index bc0cf26b12..00ec9da284 100644 --- a/src/backend/libpq/auth.c +++ b/src/backend/libpq/auth.c @@ -165,6 +165,7 @@ static int CheckCertAuth(Port *port); */ char *pg_krb_server_keyfile; bool pg_krb_caseins_users; +bool pg_gss_accept_deleg; /*---------------------------------------------------------------- @@ -918,6 +919,7 @@ pg_GSS_recvauth(Port *port) int mtype; StringInfoData buf; gss_buffer_desc gbuf; + gss_cred_id_t delegated_creds; /* * Use the configured keytab, if there is one. Unfortunately, Heimdal @@ -947,6 +949,9 @@ pg_GSS_recvauth(Port *port) */ port->gss->ctx = GSS_C_NO_CONTEXT; + delegated_creds = GSS_C_NO_CREDENTIAL; + port->gss->delegated_creds = false; + /* * Loop through GSSAPI message exchange. This exchange can consist of * multiple messages sent in both directions. First message is always from @@ -997,7 +1002,7 @@ pg_GSS_recvauth(Port *port) &port->gss->outbuf, &gflags, NULL, - NULL); + pg_gss_accept_deleg ? &delegated_creds : NULL); /* gbuf no longer used */ pfree(buf.data); @@ -1009,6 +1014,12 @@ pg_GSS_recvauth(Port *port) CHECK_FOR_INTERRUPTS(); + if (delegated_creds != GSS_C_NO_CREDENTIAL && gflags & GSS_C_DELEG_FLAG) + { + pg_store_delegated_credential(delegated_creds); + port->gss->delegated_creds = true; + } + if (port->gss->outbuf.length != 0) { /* diff --git a/src/backend/libpq/be-gssapi-common.c b/src/backend/libpq/be-gssapi-common.c index fb39c760d8..64d41e5291 100644 --- a/src/backend/libpq/be-gssapi-common.c +++ b/src/backend/libpq/be-gssapi-common.c @@ -92,3 +92,56 @@ pg_GSS_error(const char *errmsg, (errmsg_internal("%s", errmsg), errdetail_internal("%s: %s", msg_major, msg_minor))); } + +/* + * Store the credentials passed in into the memory cache for later usage. + * + * This allows credentials to be delegated to us for us to use to connect + * to other systems with, using, e.g. postgres_fdw or dblink. + */ +#define GSS_MEMORY_CACHE "MEMORY:" +void +pg_store_delegated_credential(gss_cred_id_t cred) +{ + OM_uint32 major, + minor; + gss_OID_set mech; + gss_cred_usage_t usage; + gss_key_value_element_desc cc; + gss_key_value_set_desc ccset; + + cc.key = "ccache"; + cc.value = GSS_MEMORY_CACHE; + ccset.count = 1; + ccset.elements = &cc; + + /* Make the delegated credential only available to current process */ + major = gss_store_cred_into(&minor, + cred, + GSS_C_INITIATE, /* credential only used for + * starting libpq connection */ + GSS_C_NULL_OID, /* store all */ + true, /* overwrite */ + true, /* make default */ + &ccset, + &mech, + &usage); + + if (major != GSS_S_COMPLETE) + { + pg_GSS_error("gss_store_cred", major, minor); + } + + /* Credential stored, so we can release our credential handle. */ + major = gss_release_cred(&minor, &cred); + if (major != GSS_S_COMPLETE) + { + pg_GSS_error("gss_release_cred", major, minor); + } + + /* + * Set KRB5CCNAME for this backend, so that later calls to + * gss_acquire_cred will find the delegated credentials we stored. + */ + setenv("KRB5CCNAME", GSS_MEMORY_CACHE, 1); +} diff --git a/src/backend/libpq/be-secure-gssapi.c b/src/backend/libpq/be-secure-gssapi.c index 3b55f43199..73f8ce8554 100644 --- a/src/backend/libpq/be-secure-gssapi.c +++ b/src/backend/libpq/be-secure-gssapi.c @@ -497,6 +497,7 @@ secure_open_gssapi(Port *port) bool complete_next = false; OM_uint32 major, minor; + gss_cred_id_t delegated_creds; /* * Allocate subsidiary Port data for GSSAPI operations. @@ -504,6 +505,9 @@ secure_open_gssapi(Port *port) port->gss = (pg_gssinfo *) MemoryContextAllocZero(TopMemoryContext, sizeof(pg_gssinfo)); + delegated_creds = GSS_C_NO_CREDENTIAL; + port->gss->delegated_creds = false; + /* * Allocate buffers and initialize state variables. By malloc'ing the * buffers at this point, we avoid wasting static data space in processes @@ -588,7 +592,8 @@ secure_open_gssapi(Port *port) GSS_C_NO_CREDENTIAL, &input, GSS_C_NO_CHANNEL_BINDINGS, &port->gss->name, NULL, &output, NULL, - NULL, NULL); + NULL, pg_gss_accept_deleg ? &delegated_creds : NULL); + if (GSS_ERROR(major)) { pg_GSS_error(_("could not accept GSSAPI security context"), @@ -605,6 +610,12 @@ secure_open_gssapi(Port *port) complete_next = true; } + if (delegated_creds != GSS_C_NO_CREDENTIAL) + { + pg_store_delegated_credential(delegated_creds); + port->gss->delegated_creds = true; + } + /* Done handling the incoming packet, reset our buffer */ PqGSSRecvLength = 0; @@ -731,3 +742,16 @@ be_gssapi_get_princ(Port *port) return port->gss->princ; } + +/* + * Return if GSSAPI delegated credentials were included on this + * connection. + */ +bool +be_gssapi_get_deleg(Port *port) +{ + if (!port || !port->gss) + return NULL; + + return port->gss->delegated_creds; +} diff --git a/src/backend/utils/activity/backend_status.c b/src/backend/utils/activity/backend_status.c index 608d01ea0d..391d5de043 100644 --- a/src/backend/utils/activity/backend_status.c +++ b/src/backend/utils/activity/backend_status.c @@ -384,6 +384,7 @@ pgstat_bestart(void) lbeentry.st_gss = true; lgssstatus.gss_auth = be_gssapi_get_auth(MyProcPort); lgssstatus.gss_enc = be_gssapi_get_enc(MyProcPort); + lgssstatus.gss_deleg = be_gssapi_get_deleg(MyProcPort); if (princ) strlcpy(lgssstatus.gss_princ, princ, NAMEDATALEN); } diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index ae180da4d0..e79b065d21 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -303,7 +303,7 @@ pg_stat_get_progress_info(PG_FUNCTION_ARGS) Datum pg_stat_get_activity(PG_FUNCTION_ARGS) { -#define PG_STAT_GET_ACTIVITY_COLS 30 +#define PG_STAT_GET_ACTIVITY_COLS 31 int num_backends = pgstat_fetch_stat_numbackends(); int curr_backend; int pid = PG_ARGISNULL(0) ? -1 : PG_GETARG_INT32(0); @@ -395,7 +395,7 @@ pg_stat_get_activity(PG_FUNCTION_ARGS) pfree(clipped_activity); /* leader_pid */ - nulls[28] = true; + nulls[29] = true; proc = BackendPidGetProc(beentry->st_procpid); @@ -432,8 +432,8 @@ pg_stat_get_activity(PG_FUNCTION_ARGS) */ if (leader && leader->pid != beentry->st_procpid) { - values[28] = Int32GetDatum(leader->pid); - nulls[28] = false; + values[29] = Int32GetDatum(leader->pid); + nulls[29] = false; } else if (beentry->st_backendType == B_BG_WORKER) { @@ -441,8 +441,8 @@ pg_stat_get_activity(PG_FUNCTION_ARGS) if (leader_pid != InvalidPid) { - values[28] = Int32GetDatum(leader_pid); - nulls[28] = false; + values[29] = Int32GetDatum(leader_pid); + nulls[29] = false; } } } @@ -600,6 +600,8 @@ pg_stat_get_activity(PG_FUNCTION_ARGS) values[25] = BoolGetDatum(beentry->st_gssstatus->gss_auth); /* gss_auth */ values[26] = CStringGetTextDatum(beentry->st_gssstatus->gss_princ); values[27] = BoolGetDatum(beentry->st_gssstatus->gss_enc); /* GSS Encryption in use */ + values[28] = BoolGetDatum(beentry->st_gssstatus->gss_deleg); /* GSS credentials + * delegated */ } else { @@ -607,11 +609,13 @@ pg_stat_get_activity(PG_FUNCTION_ARGS) nulls[26] = true; /* No GSS principal */ values[27] = BoolGetDatum(false); /* GSS Encryption not in * use */ + values[28] = BoolGetDatum(false); /* GSS credentials not + * delegated */ } if (beentry->st_query_id == 0) - nulls[29] = true; + nulls[30] = true; else - values[29] = UInt64GetDatum(beentry->st_query_id); + values[30] = UInt64GetDatum(beentry->st_query_id); } else { @@ -640,6 +644,7 @@ pg_stat_get_activity(PG_FUNCTION_ARGS) nulls[27] = true; nulls[28] = true; nulls[29] = true; + nulls[30] = true; } tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls); diff --git a/src/backend/utils/init/postinit.c b/src/backend/utils/init/postinit.c index 60feae0f1b..5af87a7868 100644 --- a/src/backend/utils/init/postinit.c +++ b/src/backend/utils/init/postinit.c @@ -282,15 +282,17 @@ PerformAuthentication(Port *port) if (princ) appendStringInfo(&logmsg, - _(" GSS (authenticated=%s, encrypted=%s, principal=%s)"), + _(" GSS (authenticated=%s, encrypted=%s, deleg_credentials=%s, principal=%s)"), be_gssapi_get_auth(port) ? _("yes") : _("no"), be_gssapi_get_enc(port) ? _("yes") : _("no"), + be_gssapi_get_deleg(port) ? _("yes") : _("no"), princ); else appendStringInfo(&logmsg, - _(" GSS (authenticated=%s, encrypted=%s)"), + _(" GSS (authenticated=%s, encrypted=%s, deleg_credentials=%s)"), be_gssapi_get_auth(port) ? _("yes") : _("no"), - be_gssapi_get_enc(port) ? _("yes") : _("no")); + be_gssapi_get_enc(port) ? _("yes") : _("no"), + be_gssapi_get_deleg(port) ? _("yes") : _("no")); } #endif diff --git a/src/backend/utils/misc/guc_tables.c b/src/backend/utils/misc/guc_tables.c index 1067537e74..cab3ddbe11 100644 --- a/src/backend/utils/misc/guc_tables.c +++ b/src/backend/utils/misc/guc_tables.c @@ -1727,6 +1727,16 @@ struct config_bool ConfigureNamesBool[] = NULL, NULL, NULL }, + { + {"gss_accept_deleg", PGC_SIGHUP, CONN_AUTH_AUTH, + gettext_noop("Sets whether GSSAPI delegation should be accepted from the client."), + NULL + }, + &pg_gss_accept_deleg, + false, + NULL, NULL, NULL + }, + { {"escape_string_warning", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS, gettext_noop("Warn about backslash escapes in ordinary string literals."), diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index e715aff3b8..dce5049bc2 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -101,6 +101,7 @@ # GSSAPI using Kerberos #krb_server_keyfile = 'FILE:${sysconfdir}/krb5.keytab' #krb_caseins_users = off +#gss_accept_deleg = off # - SSL - diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index dcbc4c2eb5..b516cee8bd 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -5438,9 +5438,9 @@ proname => 'pg_stat_get_activity', prorows => '100', proisstrict => 'f', proretset => 't', provolatile => 's', proparallel => 'r', prorettype => 'record', proargtypes => 'int4', - proallargtypes => '{int4,oid,int4,oid,text,text,text,text,text,timestamptz,timestamptz,timestamptz,timestamptz,inet,text,int4,xid,xid,text,bool,text,text,int4,text,numeric,text,bool,text,bool,int4,int8}', - proargmodes => '{i,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o}', - proargnames => '{pid,datid,pid,usesysid,application_name,state,query,wait_event_type,wait_event,xact_start,query_start,backend_start,state_change,client_addr,client_hostname,client_port,backend_xid,backend_xmin,backend_type,ssl,sslversion,sslcipher,sslbits,ssl_client_dn,ssl_client_serial,ssl_issuer_dn,gss_auth,gss_princ,gss_enc,leader_pid,query_id}', + proallargtypes => '{int4,oid,int4,oid,text,text,text,text,text,timestamptz,timestamptz,timestamptz,timestamptz,inet,text,int4,xid,xid,text,bool,text,text,int4,text,numeric,text,bool,text,bool,bool,int4,int8}', + proargmodes => '{i,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o}', + proargnames => '{pid,datid,pid,usesysid,application_name,state,query,wait_event_type,wait_event,xact_start,query_start,backend_start,state_change,client_addr,client_hostname,client_port,backend_xid,backend_xmin,backend_type,ssl,sslversion,sslcipher,sslbits,ssl_client_dn,ssl_client_serial,ssl_issuer_dn,gss_auth,gss_princ,gss_enc,gss_deleg,leader_pid,query_id}', prosrc => 'pg_stat_get_activity' }, { oid => '3318', descr => 'statistics: information about progress of backends running maintenance command', diff --git a/src/include/libpq/auth.h b/src/include/libpq/auth.h index 9916c99df1..e4d0e38c1e 100644 --- a/src/include/libpq/auth.h +++ b/src/include/libpq/auth.h @@ -18,6 +18,7 @@ extern PGDLLIMPORT char *pg_krb_server_keyfile; extern PGDLLIMPORT bool pg_krb_caseins_users; +extern PGDLLIMPORT bool pg_gss_accept_deleg; extern PGDLLIMPORT char *pg_krb_realm; extern void ClientAuthentication(Port *port); diff --git a/src/include/libpq/be-gssapi-common.h b/src/include/libpq/be-gssapi-common.h index facd24ff7f..0381f0ce77 100644 --- a/src/include/libpq/be-gssapi-common.h +++ b/src/include/libpq/be-gssapi-common.h @@ -18,13 +18,16 @@ #if defined(HAVE_GSSAPI_H) #include <gssapi.h> +#include <gssapi_ext.h> #else #include <gssapi/gssapi.h> +#include <gssapi/gssapi_ext.h> #endif extern void pg_GSS_error(const char *errmsg, OM_uint32 maj_stat, OM_uint32 min_stat); +extern void pg_store_delegated_credential(gss_cred_id_t cred); #endif /* ENABLE_GSS */ #endif /* BE_GSSAPI_COMMON_H */ diff --git a/src/include/libpq/libpq-be.h b/src/include/libpq/libpq-be.h index ac6407e9f6..e9df4295e2 100644 --- a/src/include/libpq/libpq-be.h +++ b/src/include/libpq/libpq-be.h @@ -84,6 +84,7 @@ typedef struct * GSSAPI auth was not used */ bool auth; /* GSSAPI Authentication used */ bool enc; /* GSSAPI encryption in use */ + bool delegated_creds; /* GSSAPI Delegated credentials */ #endif } pg_gssinfo; #endif @@ -328,6 +329,7 @@ extern PGDLLIMPORT openssl_tls_init_hook_typ openssl_tls_init_hook; extern bool be_gssapi_get_auth(Port *port); extern bool be_gssapi_get_enc(Port *port); extern const char *be_gssapi_get_princ(Port *port); +extern bool be_gssapi_get_deleg(Port *port); /* Read and write to a GSSAPI-encrypted connection. */ extern ssize_t be_gssapi_read(Port *port, void *ptr, size_t len); diff --git a/src/include/utils/backend_status.h b/src/include/utils/backend_status.h index f7bd83113a..9651cb1d0c 100644 --- a/src/include/utils/backend_status.h +++ b/src/include/utils/backend_status.h @@ -77,6 +77,7 @@ typedef struct PgBackendGSSStatus char gss_princ[NAMEDATALEN]; /* GSSAPI Principal used to auth */ bool gss_auth; /* If GSSAPI authentication was used */ bool gss_enc; /* If encryption is being used */ + bool gss_deleg; /* If credentials delegated */ } PgBackendGSSStatus; diff --git a/src/interfaces/libpq/exports.txt b/src/interfaces/libpq/exports.txt index e8bcc88370..7ded77aff3 100644 --- a/src/interfaces/libpq/exports.txt +++ b/src/interfaces/libpq/exports.txt @@ -186,3 +186,4 @@ PQpipelineStatus 183 PQsetTraceFlags 184 PQmblenBounded 185 PQsendFlushRequest 186 +PQconnectionUsedGSSAPI 187 diff --git a/src/interfaces/libpq/fe-auth.c b/src/interfaces/libpq/fe-auth.c index b0550e6332..fe2634230a 100644 --- a/src/interfaces/libpq/fe-auth.c +++ b/src/interfaces/libpq/fe-auth.c @@ -58,7 +58,8 @@ pg_GSS_continue(PGconn *conn, int payloadlen) { OM_uint32 maj_stat, min_stat, - lmin_s; + lmin_s, + gss_flags = GSS_C_MUTUAL_FLAG; gss_buffer_desc ginbuf; gss_buffer_desc goutbuf; @@ -92,12 +93,19 @@ pg_GSS_continue(PGconn *conn, int payloadlen) ginbuf.value = NULL; } + /* Only try to acquire credentials if GSS delegation isn't disabled. */ + if (!pg_GSS_have_cred_cache(&conn->gcred)) + conn->gcred = GSS_C_NO_CREDENTIAL; + + if (conn->gssdeleg && pg_strcasecmp(conn->gssdeleg, "enable") == 0) + gss_flags |= GSS_C_DELEG_FLAG; + maj_stat = gss_init_sec_context(&min_stat, - GSS_C_NO_CREDENTIAL, + conn->gcred, &conn->gctx, conn->gtarg_nam, GSS_C_NO_OID, - GSS_C_MUTUAL_FLAG, + gss_flags, 0, GSS_C_NO_CHANNEL_BINDINGS, (ginbuf.value == NULL) ? GSS_C_NO_BUFFER : &ginbuf, @@ -139,6 +147,7 @@ pg_GSS_continue(PGconn *conn, int payloadlen) { conn->client_finished_auth = true; gss_release_name(&lmin_s, &conn->gtarg_nam); + conn->gssapi_used = true; } return STATUS_OK; diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c index 40fef0e2c8..fcd3d0d9a3 100644 --- a/src/interfaces/libpq/fe-connect.c +++ b/src/interfaces/libpq/fe-connect.c @@ -343,6 +343,10 @@ static const internalPQconninfoOption PQconninfoOptions[] = { "GSS-library", "", 7, /* sizeof("gssapi") == 7 */ offsetof(struct pg_conn, gsslib)}, + {"gssdeleg", "PGGSSDELEG", NULL, NULL, + "GSS-delegation", "", 8, /* sizeof("disable") == 8 */ + offsetof(struct pg_conn, gssdeleg)}, + {"replication", NULL, NULL, NULL, "Replication", "D", 5, offsetof(struct pg_conn, replication)}, @@ -617,6 +621,7 @@ pqDropServerData(PGconn *conn) conn->auth_req_received = false; conn->client_finished_auth = false; conn->password_needed = false; + conn->gssapi_used = false; conn->write_failed = false; free(conn->write_err_msg); conn->write_err_msg = NULL; @@ -4448,6 +4453,7 @@ freePGconn(PGconn *conn) free(conn->gssencmode); free(conn->krbsrvname); free(conn->gsslib); + free(conn->gssdeleg); free(conn->connip); /* Note that conn->Pfdebug is not ours to close or free */ free(conn->write_err_msg); @@ -7312,6 +7318,17 @@ PQconnectionUsedPassword(const PGconn *conn) return false; } +int +PQconnectionUsedGSSAPI(const PGconn *conn) +{ + if (!conn) + return false; + if (conn->gssapi_used) + return true; + else + return false; +} + int PQclientEncoding(const PGconn *conn) { diff --git a/src/interfaces/libpq/fe-secure-gssapi.c b/src/interfaces/libpq/fe-secure-gssapi.c index 038e847b7e..bf87ae3fd1 100644 --- a/src/interfaces/libpq/fe-secure-gssapi.c +++ b/src/interfaces/libpq/fe-secure-gssapi.c @@ -477,7 +477,8 @@ pqsecure_open_gss(PGconn *conn) { ssize_t ret; OM_uint32 major, - minor; + minor, + gss_flags = GSS_REQUIRED_FLAGS; uint32 netlen; PostgresPollingStatusType result; gss_buffer_desc input = GSS_C_EMPTY_BUFFER, @@ -621,13 +622,30 @@ pqsecure_open_gss(PGconn *conn) if (ret != STATUS_OK) return PGRES_POLLING_FAILED; + if (conn->gssdeleg && pg_strcasecmp(conn->gssdeleg, "enable") == 0) + { + /* Acquire credentials if possbile */ + if (conn->gcred == GSS_C_NO_CREDENTIAL) + (void) pg_GSS_have_cred_cache(&conn->gcred); + + /* + * We have credentials and gssdeleg is enabled, so request credential + * delegation. This may or may not actually result in credentials + * being delegated- it depends on if the forwardable flag has been set + * in the credential and if the server is configured to accept + * delegated credentials. + */ + if (conn->gcred != GSS_C_NO_CREDENTIAL) + gss_flags |= GSS_C_DELEG_FLAG; + } + /* * Call GSS init context, either with an empty input, or with a complete * packet from the server. */ major = gss_init_sec_context(&minor, conn->gcred, &conn->gctx, conn->gtarg_nam, GSS_C_NO_OID, - GSS_REQUIRED_FLAGS, 0, 0, &input, NULL, + gss_flags, 0, 0, &input, NULL, &output, NULL, NULL); /* GSS Init Sec Context uses the whole packet, so clear it */ @@ -647,6 +665,7 @@ pqsecure_open_gss(PGconn *conn) * to do GSS wrapping/unwrapping. */ conn->gssenc = true; + conn->gssapi_used = true; /* Clean up */ gss_release_cred(&minor, &conn->gcred); diff --git a/src/interfaces/libpq/libpq-fe.h b/src/interfaces/libpq/libpq-fe.h index f3d9220496..7476dbe0e9 100644 --- a/src/interfaces/libpq/libpq-fe.h +++ b/src/interfaces/libpq/libpq-fe.h @@ -354,6 +354,7 @@ extern int PQbackendPID(const PGconn *conn); extern PGpipelineStatus PQpipelineStatus(const PGconn *conn); extern int PQconnectionNeedsPassword(const PGconn *conn); extern int PQconnectionUsedPassword(const PGconn *conn); +extern int PQconnectionUsedGSSAPI(const PGconn *conn); extern int PQclientEncoding(const PGconn *conn); extern int PQsetClientEncoding(PGconn *conn, const char *encoding); diff --git a/src/interfaces/libpq/libpq-int.h b/src/interfaces/libpq/libpq-int.h index d93e976ca5..ce0167c1b6 100644 --- a/src/interfaces/libpq/libpq-int.h +++ b/src/interfaces/libpq/libpq-int.h @@ -404,6 +404,7 @@ struct pg_conn char *krbsrvname; /* Kerberos service name */ char *gsslib; /* What GSS library to use ("gssapi" or * "sspi") */ + char *gssdeleg; /* Try to delegate GSS credentials? */ char *ssl_min_protocol_version; /* minimum TLS protocol version */ char *ssl_max_protocol_version; /* maximum TLS protocol version */ char *target_session_attrs; /* desired session properties */ @@ -465,6 +466,7 @@ struct pg_conn int sversion; /* server version, e.g. 70401 for 7.4.1 */ bool auth_req_received; /* true if any type of auth req received */ bool password_needed; /* true if server demanded a password */ + bool gssapi_used; /* true if authenticated via gssapi */ bool sigpipe_so; /* have we masked SIGPIPE via SO_NOSIGPIPE? */ bool sigpipe_flag; /* can we mask SIGPIPE via MSG_NOSIGNAL? */ bool write_failed; /* have we had a write failure on sock? */ diff --git a/src/test/kerberos/Makefile b/src/test/kerberos/Makefile index 7765f3f93b..f460d2c0e7 100644 --- a/src/test/kerberos/Makefile +++ b/src/test/kerberos/Makefile @@ -13,6 +13,9 @@ subdir = src/test/kerberos top_builddir = ../../.. include $(top_builddir)/src/Makefile.global +EXTRA_INSTALL += contrib/postgres_fdw +EXTRA_INSTALL += contrib/dblink + export with_gssapi with_krb_srvnam check: diff --git a/src/test/kerberos/t/001_auth.pl b/src/test/kerberos/t/001_auth.pl index 458246b4d7..bf12752529 100644 --- a/src/test/kerberos/t/001_auth.pl +++ b/src/test/kerberos/t/001_auth.pl @@ -7,6 +7,9 @@ # that the server-side pg_stat_gssapi view reports what we expect to # see for each test and that SYSTEM_USER returns what we expect to see. # +# Also test that GSSAPI delegation is working properly and that those +# credentials can be used to make dblink / postgres_fdw connections. +# # Since this requires setting up a full KDC, it doesn't make much sense # to have multiple test scripts (since they'd have to also create their # own KDC and that could cause race conditions or other problems)- so @@ -56,6 +59,7 @@ elsif ($^O eq 'linux') my $krb5_config = 'krb5-config'; my $kinit = 'kinit'; +my $klist = 'klist'; my $kdb5_util = 'kdb5_util'; my $kadmin_local = 'kadmin.local'; my $krb5kdc = 'krb5kdc'; @@ -64,6 +68,7 @@ if ($krb5_bin_dir && -d $krb5_bin_dir) { $krb5_config = $krb5_bin_dir . '/' . $krb5_config; $kinit = $krb5_bin_dir . '/' . $kinit; + $klist = $krb5_bin_dir . '/' . $klist; } if ($krb5_sbin_dir && -d $krb5_sbin_dir) { @@ -86,6 +91,8 @@ my $kdc_datadir = "${PostgreSQL::Test::Utils::tmp_check}/krb5kdc"; my $kdc_pidfile = "${PostgreSQL::Test::Utils::tmp_check}/krb5kdc.pid"; my $keytab = "${PostgreSQL::Test::Utils::tmp_check}/krb5.keytab"; +my $pgpass = "${PostgreSQL::Test::Utils::tmp_check}/.pgpass"; + my $dbname = 'postgres'; my $username = 'test1'; my $application = '001_auth.pl'; @@ -100,6 +107,14 @@ $stdout =~ m/Kerberos 5 release ([0-9]+\.[0-9]+)/ or BAIL_OUT("could not get Kerberos version"); $krb5_version = $1; +# Construct a pgpass file to make sure we don't use it +append_to_file( + $pgpass, + '*:*:*:*:abc123' +); + +chmod 0600, $pgpass; + # Build the krb5.conf to use. # # Explicitly specify the default (test) realm and the KDC for @@ -126,12 +141,14 @@ kdc = FILE:$kdc_log dns_lookup_realm = false dns_lookup_kdc = false default_realm = $realm +forwardable = false rdns = false [realms] $realm = { kdc = $hostaddr:$kdc_port -}!); +} +!); append_to_file( $kdc_conf, @@ -204,7 +221,28 @@ lc_messages = 'C' }); $node->start; +my $port = $node->port(); + $node->safe_psql('postgres', 'CREATE USER test1;'); +$node->safe_psql('postgres', "CREATE USER test2 WITH ENCRYPTED PASSWORD 'abc123';"); +$node->safe_psql('postgres', 'CREATE EXTENSION postgres_fdw;'); +$node->safe_psql('postgres', 'CREATE EXTENSION dblink;'); +$node->safe_psql('postgres', "CREATE SERVER s1 FOREIGN DATA WRAPPER postgres_fdw OPTIONS (host '$host', hostaddr '$hostaddr', port '$port', dbname 'postgres');"); +$node->safe_psql('postgres', "CREATE SERVER s2 FOREIGN DATA WRAPPER postgres_fdw OPTIONS (port '$port', dbname 'postgres', passfile '$pgpass');"); + +$node->safe_psql('postgres', 'GRANT USAGE ON FOREIGN SERVER s1 TO test1;'); + +$node->safe_psql('postgres', "CREATE USER MAPPING FOR test1 SERVER s1 OPTIONS (user 'test1');"); +$node->safe_psql('postgres', "CREATE USER MAPPING FOR test1 SERVER s2 OPTIONS (user 'test2');"); + +$node->safe_psql('postgres', "CREATE TABLE t1 (c1 int);"); +$node->safe_psql('postgres', "INSERT INTO t1 VALUES (1);"); +$node->safe_psql('postgres', "CREATE FOREIGN TABLE tf1 (c1 int) SERVER s1 OPTIONS (schema_name 'public', table_name 't1');"); +$node->safe_psql('postgres', "GRANT SELECT ON t1 TO test1;"); +$node->safe_psql('postgres', "GRANT SELECT ON tf1 TO test1;"); + +$node->safe_psql('postgres', "CREATE FOREIGN TABLE tf2 (c1 int) SERVER s2 OPTIONS (schema_name 'public', table_name 't1');"); +$node->safe_psql('postgres', "GRANT SELECT ON tf2 TO test1;"); # Set up a table for SYSTEM_USER parallel worker testing. $node->safe_psql('postgres', @@ -271,12 +309,16 @@ sub test_query unlink($node->data_dir . '/pg_hba.conf'); $node->append_conf('pg_hba.conf', - qq{host all all $hostaddr/32 gss map=mymap}); + qq{ +local all test2 scram-sha-256 +host all all $hostaddr/32 gss map=mymap +}); $node->restart; test_access($node, 'test1', 'SELECT true', 2, '', 'fails without ticket'); run_log [ $kinit, 'test1' ], \$test1_password or BAIL_OUT($?); +run_log [ $klist, '-f' ] or BAIL_OUT($?); test_access( $node, @@ -294,35 +336,58 @@ $node->restart; test_access( $node, 'test1', - 'SELECT gss_authenticated AND encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, '', - 'succeeds with mapping with default gssencmode and host hba', + 'succeeds with mapping with default gssencmode and host hba, ticket not forwardable', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" ); test_access( $node, 'test1', - 'SELECT gss_authenticated AND encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, 'gssencmode=prefer', - 'succeeds with GSS-encrypted access preferred with host hba', + 'succeeds with GSS-encrypted access preferred with host hba, ticket not forwardable', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" ); + test_access( $node, 'test1', - 'SELECT gss_authenticated AND encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, 'gssencmode=require', - 'succeeds with GSS-encrypted access required with host hba', + 'succeeds with GSS-encrypted access required with host hba, ticket not forwardable', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" ); +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', + 0, + 'gssencmode=prefer gssdeleg=enable', + 'succeeds with GSS-encrypted access preferred with host hba and credentials not delegated even though asked for (ticket not forwardable)', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', + 0, + 'gssencmode=require gssdeleg=enable', + 'succeeds with GSS-encrypted access required with host hba and credentials not delegated even though asked for (ticket not forwardable)', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); + + # Test that we can transport a reasonable amount of data. test_query( $node, @@ -389,29 +454,164 @@ test_query( unlink($node->data_dir . '/pg_hba.conf'); $node->append_conf('pg_hba.conf', - qq{hostgssenc all all $hostaddr/32 gss map=mymap}); + qq{ + local all test2 scram-sha-256 + hostgssenc all all $hostaddr/32 gss map=mymap +}); + +string_replace_file($krb5_conf, "forwardable = false", "forwardable = true"); + +run_log [ $kinit, 'test1' ], \$test1_password or BAIL_OUT($?); +run_log [ $klist, '-f' ] or BAIL_OUT($?); + +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated from pg_stat_gssapi where pid = pg_backend_pid();', + 0, + 'gssencmode=prefer gssdeleg=enable', + 'succeeds with GSS-encrypted access preferred and hostgssenc hba and credentials not forwarded (server does not accept them, default)', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated from pg_stat_gssapi where pid = pg_backend_pid();', + 0, + 'gssencmode=require gssdeleg=enable', + 'succeeds with GSS-encrypted access required and hostgssenc hba and credentials not forwarded (server does not accept them, default)', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); + +$node->append_conf('postgresql.conf', + qq{gss_accept_deleg=off}); +$node->restart; + +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated from pg_stat_gssapi where pid = pg_backend_pid();', + 0, + 'gssencmode=prefer gssdeleg=enable', + 'succeeds with GSS-encrypted access preferred and hostgssenc hba and credentials not forwarded (server does not accept them, explicitly disabled)', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated from pg_stat_gssapi where pid = pg_backend_pid();', + 0, + 'gssencmode=require gssdeleg=enable', + 'succeeds with GSS-encrypted access required and hostgssenc hba and credentials not forwarded (server does not accept them, explicitly disabled)', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); + +$node->append_conf('postgresql.conf', + qq{gss_accept_deleg=on}); $node->restart; test_access( $node, 'test1', - 'SELECT gss_authenticated AND encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND encrypted AND credentials_delegated from pg_stat_gssapi where pid = pg_backend_pid();', + 0, + 'gssencmode=prefer gssdeleg=enable', + 'succeeds with GSS-encrypted access preferred and hostgssenc hba and credentials forwarded', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=yes, principal=test1\@$realm)" +); +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND credentials_delegated from pg_stat_gssapi where pid = pg_backend_pid();', + 0, + 'gssencmode=require gssdeleg=enable', + 'succeeds with GSS-encrypted access required and hostgssenc hba and credentials forwarded', + "connection authenticated: identity=\"test1\@$realm\" method=gss", + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=yes, principal=test1\@$realm)" +); +test_access( + $node, + 'test1', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, 'gssencmode=prefer', - 'succeeds with GSS-encrypted access preferred and hostgssenc hba', + 'succeeds with GSS-encrypted access preferred and hostgssenc hba and credentials not forwarded', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" ); test_access( $node, 'test1', - 'SELECT gss_authenticated AND encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND encrypted AND NOT credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, - 'gssencmode=require', - 'succeeds with GSS-encrypted access required and hostgssenc hba', + 'gssencmode=require gssdeleg=disable', + 'succeeds with GSS-encrypted access required and hostgssenc hba and credentials explicitly not forwarded', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=no, principal=test1\@$realm)" +); + +my $psql_out = ''; +my $psql_stderr = ''; +my $psql_rc = ''; + +$psql_rc = $node->psql( + 'postgres', + "SELECT * FROM dblink('user=test1 dbname=$dbname host=$host hostaddr=$hostaddr port=$port','select 1') as t1(c1 int);", + connstr => "user=test1 host=$host hostaddr=$hostaddr gssencmode=require gssdeleg=disable", + stdout => \$psql_out, + stderr => \$psql_stderr +); +is($psql_rc,'3','dblink attempt fails without delegated credentials'); +like($psql_stderr, qr/password or GSSAPI delegated credentials required/,'dblink does not work without delegated credentials'); +like($psql_out, qr/^$/,'dblink does not work without delegated credentials'); + +$psql_out = ''; +$psql_stderr = ''; + +$psql_rc = $node->psql( + 'postgres', + "SELECT * FROM dblink('user=test2 dbname=$dbname port=$port passfile=$pgpass','select 1') as t1(c1 int);", + connstr => "user=test1 host=$host hostaddr=$hostaddr gssencmode=require gssdeleg=disable", + stdout => \$psql_out, + stderr => \$psql_stderr ); +is($psql_rc,'3','dblink does not work without delegated credentials and with passfile'); +like($psql_stderr, qr/password or GSSAPI delegated credentials required/,'dblink does not work without delegated credentials and with passfile'); +like($psql_out, qr/^$/,'dblink does not work without delegated credentials and with passfile'); + +$psql_out = ''; +$psql_stderr = ''; + +$psql_rc = $node->psql( + 'postgres', + "TABLE tf1;", + connstr => "user=test1 host=$host hostaddr=$hostaddr gssencmode=require gssdeleg=disable", + stdout => \$psql_out, + stderr => \$psql_stderr +); +is($psql_rc,'3','postgres_fdw does not work without delegated credentials'); +like($psql_stderr, qr/password or GSSAPI delegated credentials required/,'postgres_fdw does not work without delegated credentials'); +like($psql_out, qr/^$/,'postgres_fdw does not work without delegated credentials'); + +$psql_out = ''; +$psql_stderr = ''; + +$psql_rc = $node->psql( + 'postgres', + "TABLE tf2;", + connstr => "user=test1 host=$host hostaddr=$hostaddr gssencmode=require gssdeleg=disable", + stdout => \$psql_out, + stderr => \$psql_stderr +); +is($psql_rc,'3','postgres_fdw does not work without delegated credentials and with passfile'); +like($psql_stderr, qr/password or GSSAPI delegated credentials required/,'postgres_fdw does not work without delegated credentials and with passfile'); +like($psql_out, qr/^$/,'postgres_fdw does not work without delegated credentials and with passfile'); + test_access($node, 'test1', 'SELECT true', 2, 'gssencmode=disable', 'fails with GSS encryption disabled and hostgssenc hba'); @@ -427,54 +627,123 @@ $node->connect_ok( unlink($node->data_dir . '/pg_hba.conf'); $node->append_conf('pg_hba.conf', - qq{hostnogssenc all all $hostaddr/32 gss map=mymap}); + qq{ + local all test2 scram-sha-256 + hostnogssenc all all $hostaddr/32 gss map=mymap +}); $node->restart; test_access( $node, 'test1', - 'SELECT gss_authenticated and not encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND NOT encrypted AND credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, - 'gssencmode=prefer', + 'gssencmode=prefer gssdeleg=enable', 'succeeds with GSS-encrypted access preferred and hostnogssenc hba, but no encryption', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=no, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=no, deleg_credentials=yes, principal=test1\@$realm)" ); test_access($node, 'test1', 'SELECT true', 2, 'gssencmode=require', 'fails with GSS-encrypted access required and hostnogssenc hba'); test_access( $node, 'test1', - 'SELECT gss_authenticated and not encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND NOT encrypted AND credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, - 'gssencmode=disable', + 'gssencmode=disable gssdeleg=enable', 'succeeds with GSS encryption disabled and hostnogssenc hba', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=no, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=no, deleg_credentials=yes, principal=test1\@$realm)" +); + +test_query( + $node, + 'test1', + "SELECT * FROM dblink('user=test1 dbname=$dbname host=$host hostaddr=$hostaddr port=$port','select 1') as t1(c1 int);", + qr/^1$/s, + 'gssencmode=prefer gssdeleg=enable', + 'dblink works not-encrypted (server not configured to accept encrypted GSSAPI connections)'); + +test_query( + $node, + 'test1', + "TABLE tf1;", + qr/^1$/s, + 'gssencmode=prefer gssdeleg=enable', + 'postgres_fdw works not-encrypted (server not configured to accept encrypted GSSAPI connections)'); + +$psql_out = ''; +$psql_stderr = ''; + +$psql_rc = $node->psql( + 'postgres', + "SELECT * FROM dblink('user=test2 dbname=$dbname port=$port passfile=$pgpass','select 1') as t1(c1 int);", + connstr => "user=test1 host=$host hostaddr=$hostaddr gssencmode=prefer gssdeleg=enable", + stdout => \$psql_out, + stderr => \$psql_stderr +); +is($psql_rc,'3','dblink does not work with delegated credentials and with passfile'); +like($psql_stderr, qr/password or GSSAPI delegated credentials required/,'dblink does not work with delegated credentials and with passfile'); +like($psql_out, qr/^$/,'dblink does not work with delegated credentials and with passfile'); + +$psql_out = ''; +$psql_stderr = ''; + +$psql_rc = $node->psql( + 'postgres', + "TABLE tf2;", + connstr => "user=test1 host=$host hostaddr=$hostaddr gssencmode=prefer gssdeleg=enable", + stdout => \$psql_out, + stderr => \$psql_stderr ); +is($psql_rc,'3','postgres_fdw does not work with delegated credentials and with passfile'); +like($psql_stderr, qr/password or GSSAPI delegated credentials required/,'postgres_fdw does not work with delegated credentials and with passfile'); +like($psql_out, qr/^$/,'postgres_fdw does not work with delegated credentials and with passfile'); truncate($node->data_dir . '/pg_ident.conf', 0); unlink($node->data_dir . '/pg_hba.conf'); $node->append_conf('pg_hba.conf', - qq{host all all $hostaddr/32 gss include_realm=0}); + qq{ + local all test2 scram-sha-256 + host all all $hostaddr/32 gss include_realm=0 +}); $node->restart; test_access( $node, 'test1', - 'SELECT gss_authenticated AND encrypted from pg_stat_gssapi where pid = pg_backend_pid();', + 'SELECT gss_authenticated AND encrypted AND credentials_delegated FROM pg_stat_gssapi WHERE pid = pg_backend_pid();', 0, - '', + 'gssdeleg=enable', 'succeeds with include_realm=0 and defaults', "connection authenticated: identity=\"test1\@$realm\" method=gss", - "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, principal=test1\@$realm)" + "connection authorized: user=$username database=$dbname application_name=$application GSS (authenticated=yes, encrypted=yes, deleg_credentials=yes, principal=test1\@$realm)" ); +test_query( + $node, + 'test1', + "SELECT * FROM dblink('user=test1 dbname=$dbname host=$host hostaddr=$hostaddr port=$port password=1234','select 1') as t1(c1 int);", + qr/^1$/s, + 'gssencmode=require gssdeleg=enable', + 'dblink works encrypted'); + +test_query( + $node, + 'test1', + "TABLE tf1;", + qr/^1$/s, + 'gssencmode=require gssdeleg=enable', + 'postgres_fdw works encrypted'); + # Reset pg_hba.conf, and cause a usermap failure with an authentication # that has passed. unlink($node->data_dir . '/pg_hba.conf'); $node->append_conf('pg_hba.conf', - qq{host all all $hostaddr/32 gss include_realm=0 krb_realm=EXAMPLE.ORG}); + qq{ + local all test2 scram-sha-256 + host all all $hostaddr/32 gss include_realm=0 krb_realm=EXAMPLE.ORG +}); $node->restart; test_access( diff --git a/src/test/perl/PostgreSQL/Test/Utils.pm b/src/test/perl/PostgreSQL/Test/Utils.pm index 878e12b15e..9249954b49 100644 --- a/src/test/perl/PostgreSQL/Test/Utils.pm +++ b/src/test/perl/PostgreSQL/Test/Utils.pm @@ -65,6 +65,7 @@ our @EXPORT = qw( slurp_dir slurp_file append_to_file + string_replace_file check_mode_recursive chmod_recursive check_pg_config @@ -549,6 +550,32 @@ sub append_to_file =pod +=item string_replace_file(filename, find, replace) + +Find and replace string of a given file. + +=cut + +sub string_replace_file +{ + my ($filename, $find, $replace) = @_; + open(my $in, '<', $filename); + my $content; + while(<$in>) + { + $_ =~ s/$find/$replace/; + $content = $content.$_; + } + close $in; + open(my $out, '>', $filename); + print $out $content; + close($out); + + return; +} + +=pod + =item check_mode_recursive(dir, expected_dir_mode, expected_file_mode, ignore_list) Check that all file/dir modes in a directory match the expected values, diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out index 2d75dd6656..919d947ec0 100644 --- a/src/test/regress/expected/rules.out +++ b/src/test/regress/expected/rules.out @@ -1760,7 +1760,7 @@ pg_stat_activity| SELECT s.datid, s.query_id, s.query, s.backend_type - FROM ((pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, leader_pid, query_id) + FROM ((pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, gss_deleg, leader_pid, query_id) LEFT JOIN pg_database d ON ((s.datid = d.oid))) LEFT JOIN pg_authid u ON ((s.usesysid = u.oid))); pg_stat_all_indexes| SELECT c.oid AS relid, @@ -1876,8 +1876,9 @@ pg_stat_database_conflicts| SELECT oid AS datid, pg_stat_gssapi| SELECT pid, gss_auth AS gss_authenticated, gss_princ AS principal, - gss_enc AS encrypted - FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, leader_pid, query_id) + gss_enc AS encrypted, + gss_deleg AS credentials_delegated + FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, gss_deleg, leader_pid, query_id) WHERE (client_port IS NOT NULL); pg_stat_io| SELECT backend_type, io_object, @@ -2075,7 +2076,7 @@ pg_stat_replication| SELECT s.pid, w.sync_priority, w.sync_state, w.reply_time - FROM ((pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, leader_pid, query_id) + FROM ((pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, gss_deleg, leader_pid, query_id) JOIN pg_stat_get_wal_senders() w(pid, state, sent_lsn, write_lsn, flush_lsn, replay_lsn, write_lag, flush_lag, replay_lag, sync_priority, sync_state, reply_time) ON ((s.pid = w.pid))) LEFT JOIN pg_authid u ON ((s.usesysid = u.oid))); pg_stat_replication_slots| SELECT s.slot_name, @@ -2109,7 +2110,7 @@ pg_stat_ssl| SELECT pid, ssl_client_dn AS client_dn, ssl_client_serial AS client_serial, ssl_issuer_dn AS issuer_dn - FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, leader_pid, query_id) + FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, gss_deleg, leader_pid, query_id) WHERE (client_port IS NOT NULL); pg_stat_subscription| SELECT su.oid AS subid, su.subname, -- 2.34.1
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