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MDEV-31855 validate ssl certificates using client password

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if the client enabled --ssl-verify-server-cert, then
the server certificate is verified as follows:

* if --ssl-ca or --ssl-capath were specified, the cert must have
  a proper signature by the specified CA (or CA in the path)
  and the cert's hostname must match the server's hostname.
  If the cert isn't signed or a hostname is wrong - the
  connection is aborted.

* if MARIADB_OPT_TLS_PEER_FP was used and the fingerprint matches,
  the connection is allowed, if it doesn't match - aborted.

* If the connection uses unix socket or named pipes - it's allowed.
  (consistent with server's --require-secure-transport behavior)

otherwise the cert is still in doubt, we don't know if we can trust
it or there's an active MitM in progress.

* If the user has provided no password or the server requested an
  authentication plugin that sends the password in cleartext -
  the connection is aborted.

* Perform the authentication. If the server accepts the password,
  it'll send SHA2(scramble || password hash || cert fingerprint)
  with the OK packet.

* Verify the SHA2 digest, if it matches - the connection is allowed,
  otherwise it's aborted.
This commit is contained in:
Sergei Golubchik
2023-08-21 16:25:56 +02:00
parent 585c096aa5
commit 1ef1bab99e
13 changed files with 196 additions and 18 deletions
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2
mysql-test/main/mysqldump.result
View File

@ -6666,7 +6666,7 @@ drop table t1;
mariadb-dump: --xml can't be used with --tab.
select @@max_connections into @save_max_connections;
set global max_connections=10;
mariadb-dump: Got error: 1040: "Too many connections" when trying to connect
mariadb-dump: Got error: 2002: "Received error packet before completion of TLS handshake. The authenticity of the following error cannot be verified: 1040 - Too many connections" when trying to connect
set global max_connections=300;
mariadb-dump: Too many connections
set global max_connections=@save_max_connections;