Add a ZM_DB_SSL_VERIFY_SERVER_CERT setting so a database connection that uses
ZM_DB_SSL_CA_CERT can talk to a server with a self-signed or otherwise
non-matching certificate. When enabled, verification is by identity (the cert
must chain to the CA and its CN/SAN must match ZM_DB_HOST), consistent across
the C++ daemons, the PHP web interface, the CakePHP API and the Perl scripts.
This re-does the reverted #3817. That PR broke the build because it called
mysql_options(MYSQL_OPT_SSL_VERIFY_SERVER_CERT, ...), and that enum was removed
from the MySQL 8.0 C client in favour of MYSQL_OPT_SSL_MODE; it also passed a
c_str() where a my_bool* was expected, and referenced the PHP constant
unconditionally (fatal on PHP 8 for an upgraded install whose zm.conf predates
the option).
The option that controls server-cert verification differs by client library and
the symbols are enum values, not macros, so CMake feature-detects them by
compiling:
- HAVE_MYSQL_OPT_SSL_MODE (MySQL 5.7.11+/8.0, MariaDB Connector/C 3.1+)
- HAVE_MYSQL_OPT_SSL_VERIFY_SERVER_CERT (older MariaDB/MySQL)
zm_db.cpp uses SSL_MODE_VERIFY_IDENTITY / SSL_MODE_REQUIRED when the former is
available, else falls back to the latter with a proper my_bool.
Value handling is three-way in every layer: a truthy value verifies, a false-y
value (0/false/no/off) skips verification, and an empty/unset value leaves the
client default in place so existing installs are unchanged on upgrade. PHP, the
API datasource (via PDO flags) and the Perl DSN are all guarded with defined()
checks. Fresh installs default to 1.
Documents the full ZM_DB_* connection and SSL settings, including the hostname
verification gotcha when connecting by IP, in docs/userguide/configfiles.rst.
refs #3816
* Fix install location for config files when building to alternate directory.
With the previous code, we ended up with a directory structure like the following:
$ find /etc/zm/conf.d/
/etc/zm/conf.d/
/etc/zm/conf.d/01-system-paths.conf
/etc/zm/conf.d/conf.d
/etc/zm/conf.d/conf.d/README
/etc/zm/conf.d/conf.d/02-multiserver.conf
* Omitted README file that should have appeared in /etc/zm/conf.d
* Fix location for configs when building to alternate directory.
* Fix works, but this should go on a branch instead.
* Fix works, but this should go on a branch instead.
* Fix location for configs when building to alternate directory.
With the previous code, we ended up with a directory structure like the following:
$ find /etc/zm/conf.d/
/etc/zm/conf.d/
/etc/zm/conf.d/01-system-paths.conf
/etc/zm/conf.d/conf.d
/etc/zm/conf.d/conf.d/README
/etc/zm/conf.d/conf.d/02-multiserver.conf
* Remove double quotes. This is a list of paths.
* Allow SSL database connection to be secured with SSL.
* Fix incorrect variable name
* Fix PHP syntax errors
* SSL connection parameters must also be passed in API.
* Revert fixes to build files; they should not be in this branch.
