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db_mysql: built with mariadb-connector-c does not use TLS #3735

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space88man opened this issue Jan 30, 2024 · 1 comment
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db_mysql: built with mariadb-connector-c does not use TLS #3735

space88man opened this issue Jan 30, 2024 · 1 comment

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@space88man
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space88man commented Jan 30, 2024 •
edited

Description

Applies to db_mysql built with mariadb-connector-c; TLS is not working

Option 1: configure mariadb server to use TLS (optional)
Option 2: configure mariadb server to use TLS (mandatory)

RHEL RPMs of db_mysql are using mariadb-connector-c so do not work with TLS.

Troubleshooting

  1. wireshark inspect the pcap dump of traffic to :3306 and look for ClientHello
  2. gdb main kamailio process and set breakpoint at SSL_new

Reproduction

  1. Option 1: server advertises SSL, but db_mysql will always choose plain
  2. Option 2: server advertises SSL(and requires SSL), connection will fail

Additional Information

  • db_unixodbc + mariadb-connector-odbc CAN work with TLS so it is inconsistent that the native driver fails with TLS

Kamailio version

  • master
@space88man
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Current WIP to enable TLS on #3734.

Use existing opt_ssl_mode and map as follows.:

  1. 0(off), 1(SSL_MODE_DISABLED): mariadb-connector-c defaults
  2. 2(SSL_MODE_PREFERRED) 3(SSL_MODE_REQUIRED) 4(SSL_MODE_VERIFY_CA): MYSQL_OPT_SSL_ENFORCE
  3. 5(SSL_MODE_VERIFY_IDENTITY): MYSQL_OTP_SSL_VERIFY_SERVER_CERT

@space88man space88man mentioned this issue Jan 30, 2024
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space88man added a commit to space88man/kamailio that referenced this issue Feb 3, 2024
@space88man
db_mysql: fix no TLS with MariaDB Connector/C
a5e20f0 
Addresses kamailio#3735 - squashed from:
- d772b4c
  - mariadb-connector-c requires at least one non-NULL configuration
    value to use TLS
  - emulate MySQL SSL_MODE_XXXX options
- 0833a72
  proper macro to check mysql version id
- f0e73ea
  fix build for older releases
space88man added a commit to space88man/kamailio that referenced this issue Feb 4, 2024
@space88man
db_mysql: backport - no TLS with MariaDB Connector/C
ede2af9 
- GH kamailio#3735
- includes compilation and stretch fixes
- emulate SSL_MODE_XXX from MySQL
- opt_ssl_mode:
  - 0|1(off)
  - 2|3|4(MYSQL_OPT_SSL_ENFORCE)
  - 5(MYSQL_OPT_SSL_VERIFY_SERVER_CERT)
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