1 files changed, 120 insertions, 0 deletions
diff --git a/plugin/auth_pam/auth_pam_tool.c b/plugin/auth_pam/auth_pam_tool.c
new file mode 100644
index 00000000..225f35a6
--- /dev/null
+++ b/plugin/auth_pam/auth_pam_tool.c
@@ -0,0 +1,120 @@
+/*
+   Copyright (c) 2011, 2018 MariaDB Corporation
+
+   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 Street, Fifth Floor, Boston, MA 02111-1301 USA */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <mysql/plugin_auth_common.h>
+
+struct param {
+  unsigned char buf[10240], *ptr;
+};
+
+
+#include "auth_pam_tool.h"
+
+
+static int roundtrip(struct param *param, const unsigned char *buf,
+                     int buf_len, unsigned char **pkt)
+{
+  unsigned char b=  AP_CONV;
+  if (write(1, &b, 1) < 1 || write_string(1, buf, buf_len))
+    return -1;
+  *pkt= (unsigned char *) param->buf;
+  return read_string(0, (char *) param->buf, (int) sizeof(param->buf));
+}
+
+typedef struct st_mysql_server_auth_info
+{
+  /**
+    User name as sent by the client and shown in USER().
+    NULL if the client packet with the user name was not received yet.
+  */
+  char *user_name;
+
+  /**
+    A corresponding column value from the mysql.user table for the
+    matching account name
+  */
+  char *auth_string;
+
+  /**
+    Matching account name as found in the mysql.user table.
+    A plugin can override it with another name that will be
+    used by MySQL for authorization, and shown in CURRENT_USER()
+  */
+  char authenticated_as[MYSQL_USERNAME_LENGTH+1]; 
+} MYSQL_SERVER_AUTH_INFO;
+
+
+#include "auth_pam_base.c"
+
+
+int main(int argc __attribute__((unused)), char **argv __attribute__((unused)))
+{
+  struct param param;
+  MYSQL_SERVER_AUTH_INFO info;
+  unsigned char field;
+  int res;
+  char a_buf[MYSQL_USERNAME_LENGTH + 1 + 1024];
+
+  if ((res= setreuid(0, 0)))
+    fprintf(stderr, "Got error %d from setreuid()\n", (int) errno);
+
+  if (read(0, &field, 1) < 1)
+    return -1;
+#ifndef DBUG_OFF
+  pam_debug= field & 1;
+#endif
+  winbind_hack= field & 2;
+  
+  PAM_DEBUG((stderr, "PAM: sandbox started [%s].\n", argv[0]));
+
+  info.user_name= a_buf;
+  if ((res= read_string(0, info.user_name, sizeof(a_buf))) < 0)
+    return -1;
+  PAM_DEBUG((stderr, "PAM: sandbox username [%s].\n", info.user_name));
+
+  info.auth_string= info.user_name + res + 1;
+  if (read_string(0, info.auth_string, sizeof(a_buf) - 1 - res) < 0)
+    return -1;
+
+  PAM_DEBUG((stderr, "PAM: sandbox auth string [%s].\n", info.auth_string));
+
+  if ((res= pam_auth_base(&param, &info)) != CR_OK)
+  {
+    PAM_DEBUG((stderr, "PAM: auth failed, sandbox closed.\n"));
+    return -1;
+  }
+
+  if (info.authenticated_as[0])
+  {
+    PAM_DEBUG((stderr, "PAM: send authenticated_as field.\n"));
+    field= AP_AUTHENTICATED_AS;
+    if (write(1, &field, 1) < 1 ||
+        write_string(1, (unsigned char *) info.authenticated_as,
+                     strlen(info.authenticated_as)))
+      return -1;
+  }
+  
+  PAM_DEBUG((stderr, "PAM: send OK result.\n"));
+  field= AP_EOF;
+  if (write(1, &field, 1) != 1)
+    return -1;
+
+  PAM_DEBUG((stderr, "PAM: sandbox closed.\n"));
+  return 0;
+}