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/*
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(¶m, &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;
}
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