move authentication_windows_client and mysql_clear_password clear client auth plugins

out of libmysql into separate dynamic plugins in the plugin/ directory.

move dialog and auth_socket plugins out of the plugin directory with examples into
dedicated directories in plugin/

2 files changed, 148 insertions, 0 deletions

diff --git a/plugin/auth_socket/CMakeLists.txt b/plugin/auth_socket/CMakeLists.txt
new file mode 100644
index 00000000000..731f7d01f9a
--- /dev/null
+++ b/plugin/auth_socket/CMakeLists.txt
@@ -0,0 +1,27 @@
+# Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; version 2 of the
+# License.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+CHECK_CXX_SOURCE_COMPILES(
+"#define _GNU_SOURCE
+#include <sys/socket.h>
+int main() {
+  struct ucred cred;
+  getsockopt(0, SOL_SOCKET, SO_PEERCRED, &cred, 0);
+}" HAVE_PEERCRED)
+
+IF(HAVE_PEERCRED)
+  MYSQL_ADD_PLUGIN(auth_socket auth_socket.c MODULE_ONLY)
+ENDIF()
diff --git a/plugin/auth_socket/auth_socket.c b/plugin/auth_socket/auth_socket.c
new file mode 100644
index 00000000000..00e86bb25cf
--- /dev/null
+++ b/plugin/auth_socket/auth_socket.c
@@ -0,0 +1,121 @@
+/* Copyright (C) 2010 Sergei Golubchik and Monty Program Ab
+   Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; version 2 of the
+    License.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU General Public License for more details.
+    
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+
+/**
+  @file
+
+  auth_socket authentication plugin.
+
+  Authentication is successful if the connection is done via a unix socket and
+  the owner of the client process matches the user name that was used when
+  connecting to mysqld.
+*/
+#define _GNU_SOURCE /* for struct ucred */
+
+#include <mysql/plugin_auth.h>
+#include <sys/socket.h>
+#include <pwd.h>
+#include <string.h>
+
+/**
+  perform the unix socket based authentication
+
+  This authentication callback performs a unix socket based authentication -
+  it gets the uid of the client process and considers the user authenticated
+  if it uses username of this uid. That is - if the user is already
+  authenticated to the OS (if she is logged in) - she can use MySQL as herself
+*/
+
+static int socket_auth(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
+{
+  unsigned char *pkt;
+  MYSQL_PLUGIN_VIO_INFO vio_info;
+  struct ucred cred;
+  socklen_t cred_len= sizeof(cred);
+  struct passwd pwd_buf, *pwd;
+  char buf[1024];
+
+  /* no user name yet ? read the client handshake packet with the user name */
+  if (info->user_name == 0)
+  {
+    if (vio->read_packet(vio, &pkt) < 0)
+      return CR_ERROR;
+  }
+
+  info->password_used= PASSWORD_USED_NO_MENTION;
+
+  vio->info(vio, &vio_info);
+  if (vio_info.protocol != MYSQL_VIO_SOCKET)
+    return CR_ERROR;
+
+  /* get the UID of the client process */
+  if (getsockopt(vio_info.socket, SOL_SOCKET, SO_PEERCRED, &cred, &cred_len))
+    return CR_ERROR;
+
+  if (cred_len != sizeof(cred))
+    return CR_ERROR;
+
+  /* and find the username for this uid */
+  getpwuid_r(cred.uid, &pwd_buf, buf, sizeof(buf), &pwd);
+  if (pwd == NULL)
+    return CR_ERROR;
+
+  /* now it's simple as that */
+  return strcmp(pwd->pw_name, info->user_name) ? CR_ERROR : CR_OK;
+}
+
+static struct st_mysql_auth socket_auth_handler=
+{
+  MYSQL_AUTHENTICATION_INTERFACE_VERSION,
+  0,
+  socket_auth
+};
+
+mysql_declare_plugin(socket_auth)
+{
+  MYSQL_AUTHENTICATION_PLUGIN,
+  &socket_auth_handler,
+  "auth_socket",
+  "Sergei Golubchik",
+  "Unix Socket based authentication",
+  PLUGIN_LICENSE_GPL,
+  NULL,
+  NULL,
+  0x0100,
+  NULL,
+  NULL,
+  NULL
+}
+mysql_declare_plugin_end;
+maria_declare_plugin(socket_auth)
+{
+  MYSQL_AUTHENTICATION_PLUGIN,
+  &socket_auth_handler,
+  "auth_socket",
+  "Sergei Golubchik",
+  "Unix Socket based authentication",
+  PLUGIN_LICENSE_GPL,
+  NULL,
+  NULL,
+  0x0100,
+  NULL,
+  NULL,
+  "1.0",
+  MariaDB_PLUGIN_MATURITY_BETA
+}
+maria_declare_plugin_end;
+