41a6de41ed
When using a client compiled without channel binding support (linking to OpenSSL 1.0.1 or older) to connect to a server which supports channel binding (linking to OpenSSL 1.0.2 or newer), libpq would generate a confusing error message with channel_binding=require for an SSL connection, where the server sends back SCRAM-SHA-256-PLUS: "channel binding is required, but server did not offer an authentication method that supports channel binding." This is confusing because the server did send a SASL mechanism able to support channel binding, but libpq was not able to detect that properly. The situation can be summarized as followed for the case described in the previous paragraph for the SASL mechanisms used with the various modes of channel_binding: 1) Client supports channel binding. 1-1) channel_binding = disable => OK, with SCRAM-SHA-256. 1-2) channel_binding = prefer => OK, with SCRAM-SHA-256-PLUS. 1-3) channel_binding = require => OK, with SCRAM-SHA-256-PLUS. 2) Client does not support channel binding. 2-1) channel_binding = disable => OK, with SCRAM-SHA-256. 2-2) channel_binding = prefer => OK, with SCRAM-SHA-256. 2-3) channel_binding = require => failure with new error message, instead of the confusing one. This commit updates case 2-3 to generate a better error message. Note that the SSL TAP tests are not impacted as it is not possible to test with mixed versions of OpenSSL for the backend and libpq. Reported-by: Tom Lane Author: Michael Paquier Reviewed-by: Jeff Davis, Tom Lane Discussion: https://postgr.es/m/24857.1569775891@sss.pgh.pa.us |
||
|---|---|---|
| config | ||
| contrib | ||
| doc | ||
| src | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| HISTORY | ||
| Makefile | ||
| README | ||
| README.git | ||
| aclocal.m4 | ||
| configure | ||
| configure.in | ||
README
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.