mirror of
https://github.com/MariaDB/server.git
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120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*
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Copyright (c) 2011, 2018 MariaDB Corporation
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <mysql/plugin_auth_common.h>
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struct param {
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unsigned char buf[10240], *ptr;
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};
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#include "auth_pam_tool.h"
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static int roundtrip(struct param *param, const unsigned char *buf,
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int buf_len, unsigned char **pkt)
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{
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unsigned char b= AP_CONV;
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if (write(1, &b, 1) < 1 || write_string(1, buf, buf_len))
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return -1;
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*pkt= (unsigned char *) param->buf;
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return read_string(0, (char *) param->buf, (int) sizeof(param->buf));
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}
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typedef struct st_mysql_server_auth_info
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{
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/**
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User name as sent by the client and shown in USER().
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NULL if the client packet with the user name was not received yet.
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*/
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char *user_name;
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/**
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A corresponding column value from the mysql.user table for the
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matching account name
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*/
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char *auth_string;
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/**
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Matching account name as found in the mysql.user table.
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A plugin can override it with another name that will be
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used by MySQL for authorization, and shown in CURRENT_USER()
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*/
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char authenticated_as[MYSQL_USERNAME_LENGTH+1];
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} MYSQL_SERVER_AUTH_INFO;
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#include "auth_pam_base.c"
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int main(int argc __attribute__((unused)), char **argv __attribute__((unused)))
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{
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struct param param;
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MYSQL_SERVER_AUTH_INFO info;
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unsigned char field;
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int res;
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char a_buf[MYSQL_USERNAME_LENGTH + 1 + 1024];
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if ((res= setreuid(0, 0)))
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fprintf(stderr, "Got error %d from setreuid()\n", (int) errno);
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if (read(0, &field, 1) < 1)
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return -1;
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#ifndef DBUG_OFF
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pam_debug= field & 1;
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#endif
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winbind_hack= field & 2;
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PAM_DEBUG((stderr, "PAM: sandbox started [%s].\n", argv[0]));
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info.user_name= a_buf;
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if ((res= read_string(0, info.user_name, sizeof(a_buf))) < 0)
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return -1;
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PAM_DEBUG((stderr, "PAM: sandbox username [%s].\n", info.user_name));
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info.auth_string= info.user_name + res + 1;
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if (read_string(0, info.auth_string, sizeof(a_buf) - 1 - res) < 0)
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return -1;
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PAM_DEBUG((stderr, "PAM: sandbox auth string [%s].\n", info.auth_string));
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if ((res= pam_auth_base(¶m, &info)) != CR_OK)
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{
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PAM_DEBUG((stderr, "PAM: auth failed, sandbox closed.\n"));
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return -1;
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}
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if (info.authenticated_as[0])
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{
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PAM_DEBUG((stderr, "PAM: send authenticated_as field.\n"));
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field= AP_AUTHENTICATED_AS;
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if (write(1, &field, 1) < 1 ||
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write_string(1, (unsigned char *) info.authenticated_as,
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strlen(info.authenticated_as)))
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return -1;
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}
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PAM_DEBUG((stderr, "PAM: send OK result.\n"));
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field= AP_EOF;
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if (write(1, &field, 1) != 1)
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return -1;
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PAM_DEBUG((stderr, "PAM: sandbox closed.\n"));
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return 0;
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}
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