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| author | Georg Richter <georg@mariadb.com> | 2019-06-11 12:44:16 +0200 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2019-06-11 21:54:45 +0200 |
| commit | f3a28eed1a049069df0daa67e4978cd25c43d186 (patch) | |
| tree | 5ae565a2378b804edb51acc4e02fc3bd02006295 /sql/sys_vars.cc | |
| parent | 27fcdb161c8bb1fd21d2706ba17a3326f8221b9c (diff) | |
| download | mariadb-git-bb-10.4-MDEV-14101.tar.gz | |
MDEV-14101 Provide an option to select TLS protocol versionbb-10.4-MDEV-14101
Server and command line tools now support option --tls_version to specify the
TLS version between client and server. Valid values are TLSv1.0, TLSv1.1, TLSv1.2, TLSv1.3
or a combination of them. E.g.
--tls_version=TLSv1.3
--tls_version=TLSv1.2,TLSv1.3
In case there is a gap between versions, the lowest version will be used:
--tls_version=TLSv1.1,TLSv1.3 -> Only TLSv1.1 will be available.
If the used TLS library doesn't support the specified TLS version, it will use
the default configuration.
Limitations:
SSLv3 is not supported. The default configuration doesn't support TLSv1.0 anymore.
TLSv1.3 protocol currently is only supported by OpenSSL 1.1.0 (client and server) and
GnuTLS 3.6.5 (client only).
Overview of TLS implementations and protocols
Server:
+-----------+-----------------------------------------+
| Library | Supported TLS versions |
+-----------+-----------------------------------------+
| WolfSSL | TLSv1.1, TLSv1,2 |
+-----------+-----------------------------------------+
| OpenSSL | (TLSv1.0), TLSv1.1, TLSv1,2, TLSv1.3 |
+-----------+-----------------------------------------+
| LibreSSL | (TLSv1.0), TLSv1.1, TLSv1,2, TLSv1.3 |
+-----------+-----------------------------------------+
Client (MariaDB Connector/C)
+-----------+-----------------------------------------+
| Library | Supported TLS versions |
+-----------+-----------------------------------------+
| GnuTLS | (TLSv1.0), TLSv1.1, TLSv1.2, TLSv1.3 |
+-----------+-----------------------------------------+
| Schannel | (TLSv1.0), TLSv1.1, TLSv1.2 |
+-----------+-----------------------------------------+
| OpenSSL | (TLSv1.0), TLSv1.1, TLSv1,2, TLSv1.3 |
+-----------+-----------------------------------------+
| LibreSSL | (TLSv1.0), TLSv1.1, TLSv1,2, TLSv1.3 |
+-----------+-----------------------------------------+
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index 1160e936a2b..f2a6000843d 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -3565,6 +3565,29 @@ static Sys_var_charptr Sys_ssl_crlpath( READ_ONLY GLOBAL_VAR(opt_ssl_crlpath), SSL_OPT(OPT_SSL_CRLPATH), IN_FS_CHARSET, DEFAULT(0)); +static const char *tls_version_names[]= +{ + "TLSv1.0", + "TLSv1.1", + "TLSv1.2", + "TLSv1.3", + 0 +}; + +export bool tls_version_string_representation(THD *thd, sql_mode_t sql_mode, + LEX_CSTRING *ls) +{ + set_to_string(thd, ls, tls_version, tls_version_names); + return ls->str == 0; +} + +static Sys_var_set Sys_tls_version( + "tls_version", + "TLS protocol version for secure connections.", + READ_ONLY GLOBAL_VAR(tls_version), CMD_LINE(REQUIRED_ARG), + tls_version_names, + DEFAULT(VIO_TLSv1_1 | VIO_TLSv1_2 | VIO_TLSv1_3)); + static Sys_var_mybool Sys_standard_compliant_cte( "standard_compliant_cte", "Allow only CTEs compliant to SQL standard", |