lbbs/src/login.c

/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * login
 *   - user authentication and online status manager
 *
 * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "bbs.h"
#include "common.h"
#include "database.h"
#include "io.h"
#include "ip_mask.h"
#include "log.h"
#include "login.h"
#include "screen.h"
#include "user_priv.h"
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>
#include <unistd.h>
#include <mysql.h>
#include <sys/param.h>

static const int BBS_username_min_len = 3; // common len = 5, special len = 3
static const int BBS_password_min_len = 5; // legacy len = 5, current len = 6

static const int BBS_allowed_login_failures_within_interval = 10;
static const int BBS_login_failures_count_interval = 10; // minutes
static const int BBS_allowed_login_failures_per_account = 3;

const int BBS_login_retry_times = 3;

int bbs_login(void)
{
        char username[BBS_username_max_len + 1];
        char password[BBS_password_max_len + 1];
        int i = 0;
        int ok = 0;
        int ret;

        for (; !SYS_server_exit && !ok && i < BBS_login_retry_times; i++)
        {
                prints("\033[1;33m请输入帐号\033[m(试用请输入`\033[1;36mguest\033[m', "
                           "注册请输入`\033[1;31mnew\033[m'): ");
                iflush();

                if (str_input(username, sizeof(username), DOECHO) < 0)
                {
                        continue;
                }

                if (strcmp(username, "guest") == 0)
                {
                        load_guest_info();

                        return 0;
                }

                if (strcmp(username, "new") == 0)
                {
                        display_file(DATA_REGISTER, 1);

                        return -1;
                }

                if (username[0] != '\0')
                {
                        prints("\033[1;37m请输入密码\033[m: ");
                        iflush();

                        if (str_input(password, sizeof(password), NOECHO) < 0)
                        {
                                continue;
                        }

                        ret = check_user(username, password);
                        if (ret == 2) // Enforce update user agreement
                        {
                                BBS_update_eula = 1;
                                ret = 0;
                        }

                        ok = (ret == 0);
                        iflush();
                }
        }

        if (!ok)
        {
                display_file(DATA_LOGIN_ERROR, 1);
                return -1;
        }

        return 0;
}

int check_user(const char *username, const char *password)
{
        MYSQL *db = NULL;
        MYSQL_RES *rs = NULL;
        MYSQL_ROW row;
        char sql[SQL_BUFFER_LEN];
        int ret = 0;
        int BBS_uid = 0;
        char client_addr[IP_ADDR_LEN];
        int i;
        int ok = 1;
        char user_tz_env[BBS_user_tz_max_len + 2];

        db = db_open();
        if (db == NULL)
        {
                ret = -1;
                goto cleanup;
        }

        // Verify format
        for (i = 0; ok && username[i] != '\0'; i++)
        {
                if (!(isalpha((int)username[i]) || (i > 0 && (isdigit((int)username[i]) || username[i] == '_'))))
                {
                        ok = 0;
                }
        }
        if (ok && (i < BBS_username_min_len || i > BBS_username_max_len))
        {
                ok = 0;
        }
        for (i = 0; ok && password[i] != '\0'; i++)
        {
                if (!isalnum((int)password[i]))
                {
                        ok = 0;
                }
        }
        if (ok && (i < BBS_password_min_len || i > BBS_password_max_len))
        {
                ok = 0;
        }

        if (!ok)
        {
                prints("\033[1;31m用户名或密码格式错误...\033[m\r\n");
                ret = 1;
                goto cleanup;
        }

        // Begin transaction
        if (mysql_query(db, "SET autocommit=0") != 0)
        {
                log_error("SET autocommit=0 error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        if (mysql_query(db, "BEGIN") != 0)
        {
                log_error("Begin transaction error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        // Failed login attempts from the same source (subnet /24) during certain time period
        strncpy(client_addr, hostaddr_client, sizeof(client_addr) - 1);
        client_addr[sizeof(client_addr) - 1] = '\0';

        snprintf(sql, sizeof(sql),
                         "SELECT COUNT(*) AS err_count FROM user_err_login_log "
                         "WHERE login_dt >= SUBDATE(NOW(), INTERVAL %d MINUTE) "
                         "AND login_ip LIKE '%s'",
                         BBS_login_failures_count_interval,
                         ip_mask(client_addr, 1, '%'));
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_list error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_list data failed");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                if (atoi(row[0]) >= BBS_allowed_login_failures_within_interval)
                {
                        prints("\033[1;31m来源存在多次失败登陆尝试，请稍后再试，或使用Web方式访问\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
        }
        mysql_free_result(rs);
        rs = NULL;

        // Failed login attempts against the current username since last successful login
        snprintf(sql, sizeof(sql),
                         "SELECT COUNT(*) AS err_count FROM user_err_login_log "
                         "LEFT JOIN user_list ON user_err_login_log.username = user_list.username "
                         "LEFT JOIN user_pubinfo ON user_list.UID = user_pubinfo.UID "
                         "WHERE user_err_login_log.username = '%s' "
                         "AND (user_err_login_log.login_dt >= user_pubinfo.last_login_dt "
                         "OR user_pubinfo.last_login_dt IS NULL)",
                         username);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_list error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_list data failed");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                if (atoi(row[0]) >= BBS_allowed_login_failures_per_account)
                {
                        prints("\033[1;31m账户存在多次失败登陆尝试，请使用Web方式登录解锁\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
        }
        mysql_free_result(rs);
        rs = NULL;

        snprintf(sql, sizeof(sql),
                         "SELECT UID, username, p_login FROM user_list "
                         "WHERE username = '%s' AND password = SHA2('%s', 256) AND enable",
                         username, password);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_list error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_list data failed");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                BBS_uid = atoi(row[0]);
                strncpy(BBS_username, row[1], sizeof(BBS_username) - 1);
                BBS_username[sizeof(BBS_username) - 1] = '\0';
                int p_login = atoi(row[2]);

                mysql_free_result(rs);
                rs = NULL;

                // Add user login log
                snprintf(sql, sizeof(sql),
                                 "INSERT INTO user_login_log(UID, login_dt, login_ip) "
                                 "VALUES(%d, NOW(), '%s')",
                                 BBS_uid, hostaddr_client);
                if (mysql_query(db, sql) != 0)
                {
                        log_error("Insert into user_login_log error: %s", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                // Commit transaction
                if (mysql_query(db, "COMMIT") != 0)
                {
                        log_error("Commit transaction error: %s", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                if (p_login == 0)
                {
                        prints("\033[1;31m您目前无权登陆...\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
        }
        else
        {
                mysql_free_result(rs);
                rs = NULL;

                snprintf(sql, sizeof(sql),
                                 "INSERT INTO user_err_login_log(username, password, login_dt, login_ip) "
                                 "VALUES('%s', '%s', NOW(), '%s')",
                                 username, password, hostaddr_client);
                if (mysql_query(db, sql) != 0)
                {
                        log_error("Insert into user_err_login_log error: %s", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                // Commit transaction
                if (mysql_query(db, "COMMIT") != 0)
                {
                        log_error("Commit transaction error: %s", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                prints("\033[1;31m错误的用户名或密码...\033[m\r\n");
                ret = 1;
                goto cleanup;
        }

        // Set AUTOCOMMIT = 1
        if (mysql_query(db, "SET autocommit=1") != 0)
        {
                log_error("SET autocommit=1 error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        ret = load_user_info(db, BBS_uid);

        switch (ret)
        {
        case 0: // Login successfully
                if (!SSH_v2 && checklevel2(&BBS_priv, P_MAN_S))
                {
                        prints("\033[1;31m非普通账户必须使用SSH方式登录\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
                break;
        case -1: // Load data error
                prints("\033[1;31m读取用户数据错误...\033[m\r\n");
                ret = -1;
                goto cleanup;
        case -2: // Enforce update user agreement
                if (!SSH_v2 && checklevel2(&BBS_priv, P_MAN_S))
                {
                        prints("\033[1;31m非普通账户必须使用SSH方式登录\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
                ret = 2;
                goto cleanup;
        case -3: // Dead
                prints("\033[1;31m很遗憾，您已经永远离开了我们的世界！\033[m\r\n");
                ret = 1;
                goto cleanup;
        default:
                ret = -2;
                goto cleanup;
        }

        snprintf(sql, sizeof(sql),
                         "UPDATE user_pubinfo SET visit_count = visit_count + 1, "
                         "last_login_dt = NOW() WHERE UID = %d",
                         BBS_uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Update user_pubinfo error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        if (user_online_add(db) != 0)
        {
                ret = -1;
                goto cleanup;
        }

        BBS_last_access_tm = BBS_login_tm = time(NULL);

        // Set user tz to process env
        if (BBS_user_tz[0] != '\0')
        {
                user_tz_env[0] = ':';
                strncpy(user_tz_env + 1, BBS_user_tz, sizeof(user_tz_env) - 2);
                user_tz_env[sizeof(user_tz_env) - 1] = '\0';

                if (setenv("TZ", user_tz_env, 1) == -1)
                {
                        log_error("setenv(TZ = %s) error %d", user_tz_env, errno);
                        return -3;
                }

                tzset();
        }

cleanup:
        mysql_free_result(rs);
        mysql_close(db);

        return ret;
}

int load_user_info(MYSQL *db, int BBS_uid)
{
        MYSQL_RES *rs = NULL;
        MYSQL_ROW row;
        char sql[SQL_BUFFER_LEN];
        int life;
        time_t last_login_dt;
        int ret = 0;

        snprintf(sql, sizeof(sql),
                         "SELECT life, UNIX_TIMESTAMP(last_login_dt), user_timezone, exp, nickname "
                         "FROM user_pubinfo WHERE UID = %d",
                         BBS_uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_pubinfo error: %s", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_pubinfo data failed");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                life = atoi(row[0]);
                last_login_dt = (time_t)atol(row[1]);

                strncpy(BBS_user_tz, row[2], sizeof(BBS_user_tz) - 1);
                BBS_user_tz[sizeof(BBS_user_tz) - 1] = '\0';

                BBS_user_exp = atoi(row[3]);

                strncpy(BBS_nickname, row[4], sizeof(BBS_nickname));
                BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
        }
        else
        {
                ret = -1; // Data not found
                goto cleanup;
        }
        mysql_free_result(rs);
        rs = NULL;

        if (life != 333 && life != 365 && life != 666 && life != 999 && // Not immortal
                time(NULL) - last_login_dt > 60 * 60 * 24 * life)
        {
                ret = -3; // Dead
                goto cleanup;
        }

        if (load_priv(db, &BBS_priv, BBS_uid) != 0)
        {
                ret = -1; // Data not found
                goto cleanup;
        }

        if (last_login_dt < BBS_eula_tm)
        {
                ret = -2; // require update agreement first
                goto cleanup;
        }

cleanup:
        mysql_free_result(rs);

        return ret;
}

int load_guest_info(void)
{
        MYSQL *db = NULL;
        int ret = 0;

        db = db_open();
        if (db == NULL)
        {
                ret = -1;
                goto cleanup;
        }

        strncpy(BBS_username, "guest", sizeof(BBS_username) - 1);
        BBS_username[sizeof(BBS_username) - 1] = '\0';

        BBS_user_exp = 0;

        strncpy(BBS_nickname, "Guest", sizeof(BBS_nickname));
        BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';

        if (load_priv(db, &BBS_priv, 0) != 0)
        {
                ret = -1;
                goto cleanup;
        }

        if (user_online_add(db) != 0)
        {
                ret = -1;
                goto cleanup;
        }

        BBS_last_access_tm = BBS_login_tm = time(NULL);

cleanup:
        mysql_close(db);

        return ret;
}

int user_online_add(MYSQL *db)
{
        char sql[SQL_BUFFER_LEN];

        snprintf(sql, sizeof(sql),
                         "INSERT INTO visit_log(dt, IP) VALUES(NOW(), '%s')",
                         hostaddr_client);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Add visit log error: %s", mysql_error(db));
                return -1;
        }

        if (user_online_del(db) != 0)
        {
                return -2;
        }

        snprintf(sql, sizeof(sql),
                         "INSERT INTO user_online(SID, UID, ip, current_action, login_tm, last_tm) "
                         "VALUES('Telnet_Process_%d', %d, '%s', 'LOGIN', NOW(), NOW())",
                         getpid(), BBS_priv.uid, hostaddr_client);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Add user_online error: %s", mysql_error(db));
                return -3;
        }

        return 0;
}

int user_online_del(MYSQL *db)
{
        char sql[SQL_BUFFER_LEN];

        snprintf(sql, sizeof(sql),
                         "DELETE FROM user_online WHERE SID = 'Telnet_Process_%d'",
                         getpid());
        if (mysql_query(db, sql) != 0)
        {
                log_error("Delete user_online error: %s", mysql_error(db));
                return -1;
        }

        return 0;
}

int user_online_exp(MYSQL *db)
{
        char sql[SQL_BUFFER_LEN];

        // +1 exp for every 5 minutes online since last logout
        // but at most 24 hours worth of exp can be gained in Telnet session
        snprintf(sql, sizeof(sql),
                         "UPDATE user_pubinfo SET exp = exp + FLOOR(LEAST(TIMESTAMPDIFF("
                         "SECOND, GREATEST(last_login_dt, IF(last_logout_dt IS NULL, last_login_dt, last_logout_dt)), NOW()"
                         ") / 60 / 5, 12 * 24)), last_logout_dt = NOW() "
                         "WHERE UID = %d",
                         BBS_priv.uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Update user_pubinfo error: %s", mysql_error(db));
                return -1;
        }

        return 0;
}

int user_online_update(const char *action)
{
        MYSQL *db = NULL;
        char sql[SQL_BUFFER_LEN];

        if ((action == NULL || strcmp(BBS_current_action, action) == 0) &&
                time(NULL) - BBS_current_action_tm < BBS_current_action_refresh_interval) // No change
        {
                return 0;
        }

        if (action != NULL)
        {
                strncpy(BBS_current_action, action, sizeof(BBS_current_action) - 1);
                BBS_current_action[sizeof(BBS_current_action) - 1] = '\0';
        }

        BBS_current_action_tm = time(NULL);

        db = db_open();
        if (db == NULL)
        {
                log_error("db_open() error: %s", mysql_error(db));
                return -1;
        }

        snprintf(sql, sizeof(sql),
                         "UPDATE user_online SET current_action = '%s', last_tm = NOW() "
                         "WHERE SID = 'Telnet_Process_%d'",
                         BBS_current_action, getpid());
        if (mysql_query(db, sql) != 0)
        {
                log_error("Update user_online error: %s", mysql_error(db));
                return -2;
        }

        mysql_close(db);

        return 1;
}

int user_update_agreement(void)
{
        MYSQL *db = NULL;
        char sql[SQL_BUFFER_LEN];
        int ch;
        int ret = 0;

        clearscr();
        moveto(2, 1);
        prints("尊敬的用户：");
        moveto(3, 1);
        prints("    本站的《用户许可协议》已更新，您必须在仔细阅读并接受后，才能继续使用本站提供的服务。");
        press_any_key();

        clearscr();
        display_file(DATA_EULA, 1);

        while (!SYS_server_exit)
        {
                clearscr();
                moveto(2, 1);

                ch = press_any_key_ex("您是否接受本站的《用户许可协议》? (A)接受, (D)拒绝, (R)再看看协议 [D]", 60);
                switch (toupper(ch))
                {
                case KEY_NULL:
                        return -1;
                case KEY_TIMEOUT:
                case CR:
                case 'D':
                        moveto(3, 1);
                        prints("您已拒绝《用户许可协议》，再见！");
                        press_any_key();
                        return 0;
                case 'R':
                        clearscr();
                        display_file(DATA_EULA, 1);
                        continue;
                case 'A':
                        db = db_open();
                        if (db == NULL)
                        {
                                ret = -1;
                                goto cleanup;
                        }

                        snprintf(sql, sizeof(sql),
                                         "UPDATE user_pubinfo SET visit_count = visit_count + 1, "
                                         "last_login_dt = NOW() WHERE UID = %d",
                                         BBS_priv.uid);
                        if (mysql_query(db, sql) != 0)
                        {
                                log_error("Update user_pubinfo error: %s", mysql_error(db));
                                ret = -1;
                                goto cleanup;
                        }

                        mysql_close(db);
                        db = NULL;

                        moveto(3, 1);
                        prints("您已接受《用户许可协议》，请重新登陆。");
                        press_any_key();
                        return 1;
                default:
                        continue;
                }

                break;
        }

cleanup:
        mysql_close(db);

        return ret;
}
1	sysadm	1.65	/* SPDX-License-Identifier: GPL-3.0-or-later */
2			/*
3			* login
4			* - user authentication and online status manager
5			*
6	sysadm	1.66	* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
7	sysadm	1.65	*/
8	sysadm	1.1
9	sysadm	1.68	#ifdef HAVE_CONFIG_H
10			#include "config.h"
11			#endif
12
13	sysadm	1.1	#include "bbs.h"
14			#include "common.h"
15	sysadm	1.48	#include "database.h"
16			#include "io.h"
17	sysadm	1.50	#include "ip_mask.h"
18	sysadm	1.14	#include "log.h"
19	sysadm	1.48	#include "login.h"
20	sysadm	1.14	#include "screen.h"
21	sysadm	1.48	#include "user_priv.h"
22			#include <ctype.h>
23	sysadm	1.34	#include <errno.h>
24	sysadm	1.48	#include <stdlib.h>
25	sysadm	1.14	#include <string.h>
26	sysadm	1.3	#include <regex.h>
27	sysadm	1.14	#include <unistd.h>
28	sysadm	1.69	#include <mysql.h>
29	sysadm	1.56	#include <sys/param.h>
30	sysadm	1.1
31	sysadm	1.64	static const int BBS_username_min_len = 3; // common len = 5, special len = 3
32			static const int BBS_password_min_len = 5; // legacy len = 5, current len = 6
33
34	sysadm	1.67	static const int BBS_allowed_login_failures_within_interval = 10;
35			static const int BBS_login_failures_count_interval = 10; // minutes
36			static const int BBS_allowed_login_failures_per_account = 3;
37
38			const int BBS_login_retry_times = 3;
39
40	sysadm	1.41	int bbs_login(void)
41	sysadm	1.1	{
42	sysadm	1.15	char username[BBS_username_max_len + 1];
43			char password[BBS_password_max_len + 1];
44	sysadm	1.37	int i = 0;
45	sysadm	1.16	int ok = 0;
46	sysadm	1.74	int ret;
47	sysadm	1.2
48	sysadm	1.37	for (; !SYS_server_exit && !ok && i < BBS_login_retry_times; i++)
49	sysadm	1.11	{
50	sysadm	1.49	prints("\033[1;33m请输入帐号\033[m(试用请输入`\033[1;36mguest\033[m', "
51			"注册请输入`\033[1;31mnew\033[m'): ");
52	sysadm	1.11	iflush();
53
54	sysadm	1.24	if (str_input(username, sizeof(username), DOECHO) < 0)
55			{
56			continue;
57			}
58	sysadm	1.11
59			if (strcmp(username, "guest") == 0)
60			{
61	sysadm	1.41	load_guest_info();
62	sysadm	1.14
63	sysadm	1.11	return 0;
64			}
65
66			if (strcmp(username, "new") == 0)
67			{
68	sysadm	1.42	display_file(DATA_REGISTER, 1);
69	sysadm	1.30
70	sysadm	1.51	return -1;
71	sysadm	1.11	}
72
73	sysadm	1.17	if (username[0] != '\0')
74	sysadm	1.11	{
75	sysadm	1.49	prints("\033[1;37m请输入密码\033[m: ");
76	sysadm	1.11	iflush();
77
78	sysadm	1.24	if (str_input(password, sizeof(password), NOECHO) < 0)
79			{
80			continue;
81			}
82	sysadm	1.11
83	sysadm	1.74	ret = check_user(username, password);
84			if (ret == 2) // Enforce update user agreement
85			{
86			BBS_update_eula = 1;
87			ret = 0;
88			}
89
90			ok = (ret == 0);
91	sysadm	1.31	iflush();
92	sysadm	1.11	}
93	sysadm	1.24	}
94
95			if (!ok)
96			{
97	sysadm	1.42	display_file(DATA_LOGIN_ERROR, 1);
98	sysadm	1.24	return -1;
99	sysadm	1.11	}
100	sysadm	1.2
101	sysadm	1.11	return 0;
102			}
103	sysadm	1.2
104	sysadm	1.41	int check_user(const char username, const char password)
105	sysadm	1.11	{
106	sysadm	1.44	MYSQL *db = NULL;
107			MYSQL_RES *rs = NULL;
108	sysadm	1.11	MYSQL_ROW row;
109	sysadm	1.15	char sql[SQL_BUFFER_LEN];
110	sysadm	1.44	int ret = 0;
111	sysadm	1.40	int BBS_uid = 0;
112	sysadm	1.22	char client_addr[IP_ADDR_LEN];
113	sysadm	1.27	int i;
114			int ok = 1;
115	sysadm	1.34	char user_tz_env[BBS_user_tz_max_len + 2];
116	sysadm	1.11
117	sysadm	1.41	db = db_open();
118			if (db == NULL)
119			{
120	sysadm	1.44	ret = -1;
121			goto cleanup;
122	sysadm	1.41	}
123
124	sysadm	1.11	// Verify format
125	sysadm	1.27	for (i = 0; ok && username[i] != '\0'; i++)
126			{
127	sysadm	1.70	if (!(isalpha((int)username[i]) \|\| (i > 0 && (isdigit((int)username[i]) \|\| username[i] == '_'))))
128	sysadm	1.27	{
129			ok = 0;
130			}
131			}
132	sysadm	1.64	if (ok && (i < BBS_username_min_len \|\| i > BBS_username_max_len))
133	sysadm	1.27	{
134			ok = 0;
135			}
136			for (i = 0; ok && password[i] != '\0'; i++)
137			{
138	sysadm	1.70	if (!isalnum((int)password[i]))
139	sysadm	1.27	{
140			ok = 0;
141			}
142			}
143	sysadm	1.64	if (ok && (i < BBS_password_min_len \|\| i > BBS_password_max_len))
144	sysadm	1.27	{
145			ok = 0;
146			}
147
148			if (!ok)
149	sysadm	1.5	{
150	sysadm	1.49	prints("\033[1;31m用户名或密码格式错误...\033[m\r\n");
151	sysadm	1.44	ret = 1;
152			goto cleanup;
153	sysadm	1.5	}
154
155	sysadm	1.13	// Begin transaction
156			if (mysql_query(db, "SET autocommit=0") != 0)
157			{
158	sysadm	1.75	log_error("SET autocommit=0 error: %s", mysql_error(db));
159	sysadm	1.44	ret = -1;
160			goto cleanup;
161	sysadm	1.13	}
162
163			if (mysql_query(db, "BEGIN") != 0)
164			{
165	sysadm	1.75	log_error("Begin transaction error: %s", mysql_error(db));
166	sysadm	1.44	ret = -1;
167			goto cleanup;
168	sysadm	1.13	}
169
170	sysadm	1.22	// Failed login attempts from the same source (subnet /24) during certain time period
171			strncpy(client_addr, hostaddr_client, sizeof(client_addr) - 1);
172			client_addr[sizeof(client_addr) - 1] = '\0';
173
174			snprintf(sql, sizeof(sql),
175			"SELECT COUNT(*) AS err_count FROM user_err_login_log "
176	sysadm	1.44	"WHERE login_dt >= SUBDATE(NOW(), INTERVAL %d MINUTE) "
177	sysadm	1.22	"AND login_ip LIKE '%s'",
178	sysadm	1.44	BBS_login_failures_count_interval,
179	sysadm	1.22	ip_mask(client_addr, 1, '%'));
180			if (mysql_query(db, sql) != 0)
181			{
182	sysadm	1.75	log_error("Query user_list error: %s", mysql_error(db));
183	sysadm	1.44	ret = -1;
184			goto cleanup;
185	sysadm	1.22	}
186			if ((rs = mysql_store_result(db)) == NULL)
187			{
188	sysadm	1.75	log_error("Get user_list data failed");
189	sysadm	1.44	ret = -1;
190			goto cleanup;
191	sysadm	1.22	}
192			if ((row = mysql_fetch_row(rs)))
193			{
194	sysadm	1.52	if (atoi(row[0]) >= BBS_allowed_login_failures_within_interval)
195	sysadm	1.22	{
196	sysadm	1.52	prints("\033[1;31m来源存在多次失败登陆尝试，请稍后再试，或使用Web方式访问\033[m\r\n");
197	sysadm	1.44	ret = 1;
198			goto cleanup;
199	sysadm	1.22	}
200			}
201			mysql_free_result(rs);
202	sysadm	1.44	rs = NULL;
203	sysadm	1.22
204	sysadm	1.52	// Failed login attempts against the current username since last successful login
205	sysadm	1.22	snprintf(sql, sizeof(sql),
206			"SELECT COUNT(*) AS err_count FROM user_err_login_log "
207	sysadm	1.52	"LEFT JOIN user_list ON user_err_login_log.username = user_list.username "
208			"LEFT JOIN user_pubinfo ON user_list.UID = user_pubinfo.UID "
209			"WHERE user_err_login_log.username = '%s' "
210			"AND (user_err_login_log.login_dt >= user_pubinfo.last_login_dt "
211			"OR user_pubinfo.last_login_dt IS NULL)",
212	sysadm	1.22	username);
213			if (mysql_query(db, sql) != 0)
214			{
215	sysadm	1.75	log_error("Query user_list error: %s", mysql_error(db));
216	sysadm	1.44	ret = -1;
217			goto cleanup;
218	sysadm	1.22	}
219			if ((rs = mysql_store_result(db)) == NULL)
220			{
221	sysadm	1.75	log_error("Get user_list data failed");
222	sysadm	1.44	ret = -1;
223			goto cleanup;
224	sysadm	1.22	}
225			if ((row = mysql_fetch_row(rs)))
226			{
227	sysadm	1.53	if (atoi(row[0]) >= BBS_allowed_login_failures_per_account)
228	sysadm	1.22	{
229	sysadm	1.52	prints("\033[1;31m账户存在多次失败登陆尝试，请使用Web方式登录解锁\033[m\r\n");
230	sysadm	1.44	ret = 1;
231			goto cleanup;
232	sysadm	1.22	}
233			}
234			mysql_free_result(rs);
235	sysadm	1.44	rs = NULL;
236	sysadm	1.22
237	sysadm	1.18	snprintf(sql, sizeof(sql),
238	sysadm	1.22	"SELECT UID, username, p_login FROM user_list "
239			"WHERE username = '%s' AND password = SHA2('%s', 256) AND enable",
240			username, password);
241	sysadm	1.11	if (mysql_query(db, sql) != 0)
242			{
243	sysadm	1.75	log_error("Query user_list error: %s", mysql_error(db));
244	sysadm	1.44	ret = -1;
245			goto cleanup;
246	sysadm	1.11	}
247			if ((rs = mysql_store_result(db)) == NULL)
248	sysadm	1.2	{
249	sysadm	1.75	log_error("Get user_list data failed");
250	sysadm	1.44	ret = -1;
251			goto cleanup;
252	sysadm	1.11	}
253	sysadm	1.15	if ((row = mysql_fetch_row(rs)))
254	sysadm	1.11	{
255	sysadm	1.40	BBS_uid = atoi(row[0]);
256	sysadm	1.17	strncpy(BBS_username, row[1], sizeof(BBS_username) - 1);
257			BBS_username[sizeof(BBS_username) - 1] = '\0';
258	sysadm	1.13	int p_login = atoi(row[2]);
259
260			mysql_free_result(rs);
261	sysadm	1.44	rs = NULL;
262	sysadm	1.13
263			// Add user login log
264	sysadm	1.18	snprintf(sql, sizeof(sql),
265	sysadm	1.22	"INSERT INTO user_login_log(UID, login_dt, login_ip) "
266	sysadm	1.40	"VALUES(%d, NOW(), '%s')",
267	sysadm	1.22	BBS_uid, hostaddr_client);
268	sysadm	1.13	if (mysql_query(db, sql) != 0)
269			{
270	sysadm	1.75	log_error("Insert into user_login_log error: %s", mysql_error(db));
271	sysadm	1.44	ret = -1;
272			goto cleanup;
273	sysadm	1.13	}
274
275			// Commit transaction
276			if (mysql_query(db, "COMMIT") != 0)
277			{
278	sysadm	1.75	log_error("Commit transaction error: %s", mysql_error(db));
279	sysadm	1.44	ret = -1;
280			goto cleanup;
281	sysadm	1.13	}
282
283			if (p_login == 0)
284	sysadm	1.11	{
285	sysadm	1.49	prints("\033[1;31m您目前无权登陆...\033[m\r\n");
286	sysadm	1.44	ret = 1;
287			goto cleanup;
288	sysadm	1.11	}
289			}
290			else
291			{
292			mysql_free_result(rs);
293	sysadm	1.44	rs = NULL;
294	sysadm	1.2
295	sysadm	1.18	snprintf(sql, sizeof(sql),
296	sysadm	1.22	"INSERT INTO user_err_login_log(username, password, login_dt, login_ip) "
297			"VALUES('%s', '%s', NOW(), '%s')",
298			username, password, hostaddr_client);
299	sysadm	1.11	if (mysql_query(db, sql) != 0)
300			{
301	sysadm	1.75	log_error("Insert into user_err_login_log error: %s", mysql_error(db));
302	sysadm	1.44	ret = -1;
303			goto cleanup;
304	sysadm	1.11	}
305
306	sysadm	1.13	// Commit transaction
307			if (mysql_query(db, "COMMIT") != 0)
308			{
309	sysadm	1.75	log_error("Commit transaction error: %s", mysql_error(db));
310	sysadm	1.44	ret = -1;
311			goto cleanup;
312	sysadm	1.13	}
313
314	sysadm	1.49	prints("\033[1;31m错误的用户名或密码...\033[m\r\n");
315	sysadm	1.44	ret = 1;
316			goto cleanup;
317	sysadm	1.11	}
318	sysadm	1.13
319			// Set AUTOCOMMIT = 1
320			if (mysql_query(db, "SET autocommit=1") != 0)
321			{
322	sysadm	1.75	log_error("SET autocommit=1 error: %s", mysql_error(db));
323	sysadm	1.44	ret = -1;
324			goto cleanup;
325	sysadm	1.13	}
326	sysadm	1.2
327	sysadm	1.11	ret = load_user_info(db, BBS_uid);
328
329			switch (ret)
330	sysadm	1.2	{
331	sysadm	1.11	case 0: // Login successfully
332	sysadm	1.76	if (!SSH_v2 && checklevel2(&BBS_priv, P_MAN_S))
333			{
334			prints("\033[1;31m非普通账户必须使用SSH方式登录\033[m\r\n");
335			ret = 1;
336			goto cleanup;
337			}
338	sysadm	1.11	break;
339			case -1: // Load data error
340	sysadm	1.49	prints("\033[1;31m读取用户数据错误...\033[m\r\n");
341	sysadm	1.44	ret = -1;
342			goto cleanup;
343	sysadm	1.74	case -2: // Enforce update user agreement
344	sysadm	1.76	if (!SSH_v2 && checklevel2(&BBS_priv, P_MAN_S))
345			{
346			prints("\033[1;31m非普通账户必须使用SSH方式登录\033[m\r\n");
347			ret = 1;
348			goto cleanup;
349			}
350	sysadm	1.74	ret = 2;
351	sysadm	1.44	goto cleanup;
352	sysadm	1.11	case -3: // Dead
353	sysadm	1.49	prints("\033[1;31m很遗憾，您已经永远离开了我们的世界！\033[m\r\n");
354	sysadm	1.44	ret = 1;
355			goto cleanup;
356	sysadm	1.11	default:
357	sysadm	1.44	ret = -2;
358			goto cleanup;
359	sysadm	1.2	}
360
361	sysadm	1.18	snprintf(sql, sizeof(sql),
362	sysadm	1.22	"UPDATE user_pubinfo SET visit_count = visit_count + 1, "
363	sysadm	1.40	"last_login_dt = NOW() WHERE UID = %d",
364	sysadm	1.22	BBS_uid);
365	sysadm	1.13	if (mysql_query(db, sql) != 0)
366			{
367	sysadm	1.75	log_error("Update user_pubinfo error: %s", mysql_error(db));
368	sysadm	1.44	ret = -1;
369			goto cleanup;
370	sysadm	1.13	}
371
372	sysadm	1.15	if (user_online_add(db) != 0)
373			{
374	sysadm	1.44	ret = -1;
375			goto cleanup;
376	sysadm	1.15	}
377
378	sysadm	1.45	BBS_last_access_tm = BBS_login_tm = time(NULL);
379	sysadm	1.13
380	sysadm	1.34	// Set user tz to process env
381			if (BBS_user_tz[0] != '\0')
382			{
383			user_tz_env[0] = ':';
384			strncpy(user_tz_env + 1, BBS_user_tz, sizeof(user_tz_env) - 2);
385			user_tz_env[sizeof(user_tz_env) - 1] = '\0';
386
387			if (setenv("TZ", user_tz_env, 1) == -1)
388			{
389	sysadm	1.75	log_error("setenv(TZ = %s) error %d", user_tz_env, errno);
390	sysadm	1.34	return -3;
391			}
392
393			tzset();
394			}
395
396	sysadm	1.44	cleanup:
397			mysql_free_result(rs);
398	sysadm	1.41	mysql_close(db);
399
400	sysadm	1.44	return ret;
401	sysadm	1.1	}
402	sysadm	1.2
403	sysadm	1.40	int load_user_info(MYSQL *db, int BBS_uid)
404	sysadm	1.3	{
405	sysadm	1.44	MYSQL_RES *rs = NULL;
406	sysadm	1.11	MYSQL_ROW row;
407	sysadm	1.15	char sql[SQL_BUFFER_LEN];
408	sysadm	1.11	int life;
409			time_t last_login_dt;
410	sysadm	1.44	int ret = 0;
411	sysadm	1.11
412	sysadm	1.18	snprintf(sql, sizeof(sql),
413	sysadm	1.43	"SELECT life, UNIX_TIMESTAMP(last_login_dt), user_timezone, exp, nickname "
414	sysadm	1.40	"FROM user_pubinfo WHERE UID = %d",
415	sysadm	1.22	BBS_uid);
416	sysadm	1.11	if (mysql_query(db, sql) != 0)
417			{
418	sysadm	1.75	log_error("Query user_pubinfo error: %s", mysql_error(db));
419	sysadm	1.44	ret = -1;
420			goto cleanup;
421	sysadm	1.11	}
422			if ((rs = mysql_store_result(db)) == NULL)
423			{
424	sysadm	1.75	log_error("Get user_pubinfo data failed");
425	sysadm	1.44	ret = -1;
426			goto cleanup;
427	sysadm	1.11	}
428	sysadm	1.15	if ((row = mysql_fetch_row(rs)))
429	sysadm	1.11	{
430			life = atoi(row[0]);
431			last_login_dt = (time_t)atol(row[1]);
432	sysadm	1.34
433			strncpy(BBS_user_tz, row[2], sizeof(BBS_user_tz) - 1);
434			BBS_user_tz[sizeof(BBS_user_tz) - 1] = '\0';
435	sysadm	1.43
436			BBS_user_exp = atoi(row[3]);
437
438			strncpy(BBS_nickname, row[4], sizeof(BBS_nickname));
439			BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
440	sysadm	1.11	}
441			else
442			{
443	sysadm	1.44	ret = -1; // Data not found
444			goto cleanup;
445	sysadm	1.11	}
446			mysql_free_result(rs);
447	sysadm	1.44	rs = NULL;
448	sysadm	1.3
449	sysadm	1.13	if (life != 333 && life != 365 && life != 666 && life != 999 && // Not immortal
450	sysadm	1.45	time(NULL) - last_login_dt > 60 * 60 * 24 * life)
451	sysadm	1.11	{
452	sysadm	1.44	ret = -3; // Dead
453			goto cleanup;
454	sysadm	1.11	}
455	sysadm	1.5
456	sysadm	1.15	if (load_priv(db, &BBS_priv, BBS_uid) != 0)
457			{
458	sysadm	1.74	ret = -1; // Data not found
459	sysadm	1.44	goto cleanup;
460	sysadm	1.15	}
461	sysadm	1.11
462	sysadm	1.73	if (last_login_dt < BBS_eula_tm)
463			{
464			ret = -2; // require update agreement first
465			goto cleanup;
466			}
467
468	sysadm	1.44	cleanup:
469			mysql_free_result(rs);
470
471			return ret;
472	sysadm	1.2	}
473	sysadm	1.5
474	sysadm	1.41	int load_guest_info(void)
475	sysadm	1.5	{
476	sysadm	1.44	MYSQL *db = NULL;
477			int ret = 0;
478	sysadm	1.41
479			db = db_open();
480			if (db == NULL)
481			{
482	sysadm	1.44	ret = -1;
483			goto cleanup;
484	sysadm	1.41	}
485
486	sysadm	1.17	strncpy(BBS_username, "guest", sizeof(BBS_username) - 1);
487			BBS_username[sizeof(BBS_username) - 1] = '\0';
488	sysadm	1.5
489	sysadm	1.43	BBS_user_exp = 0;
490
491			strncpy(BBS_nickname, "Guest", sizeof(BBS_nickname));
492			BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
493
494	sysadm	1.15	if (load_priv(db, &BBS_priv, 0) != 0)
495			{
496	sysadm	1.44	ret = -1;
497			goto cleanup;
498	sysadm	1.15	}
499	sysadm	1.6
500	sysadm	1.15	if (user_online_add(db) != 0)
501			{
502	sysadm	1.44	ret = -1;
503			goto cleanup;
504	sysadm	1.15	}
505	sysadm	1.5
506	sysadm	1.45	BBS_last_access_tm = BBS_login_tm = time(NULL);
507	sysadm	1.5
508	sysadm	1.44	cleanup:
509	sysadm	1.41	mysql_close(db);
510	sysadm	1.44
511			return ret;
512	sysadm	1.5	}
513	sysadm	1.15
514			int user_online_add(MYSQL *db)
515			{
516			char sql[SQL_BUFFER_LEN];
517
518	sysadm	1.60	snprintf(sql, sizeof(sql),
519			"INSERT INTO visit_log(dt, IP) VALUES(NOW(), '%s')",
520			hostaddr_client);
521			if (mysql_query(db, sql) != 0)
522			{
523	sysadm	1.75	log_error("Add visit log error: %s", mysql_error(db));
524	sysadm	1.60	return -1;
525			}
526
527	sysadm	1.15	if (user_online_del(db) != 0)
528			{
529	sysadm	1.60	return -2;
530	sysadm	1.15	}
531
532	sysadm	1.18	snprintf(sql, sizeof(sql),
533	sysadm	1.61	"INSERT INTO user_online(SID, UID, ip, current_action, login_tm, last_tm) "
534			"VALUES('Telnet_Process_%d', %d, '%s', 'LOGIN', NOW(), NOW())",
535	sysadm	1.22	getpid(), BBS_priv.uid, hostaddr_client);
536	sysadm	1.15	if (mysql_query(db, sql) != 0)
537			{
538	sysadm	1.75	log_error("Add user_online error: %s", mysql_error(db));
539	sysadm	1.60	return -3;
540	sysadm	1.15	}
541
542			return 0;
543			}
544
545			int user_online_del(MYSQL *db)
546			{
547			char sql[SQL_BUFFER_LEN];
548
549	sysadm	1.57	snprintf(sql, sizeof(sql),
550			"DELETE FROM user_online WHERE SID = 'Telnet_Process_%d'",
551			getpid());
552			if (mysql_query(db, sql) != 0)
553			{
554	sysadm	1.75	log_error("Delete user_online error: %s", mysql_error(db));
555	sysadm	1.57	return -1;
556			}
557
558			return 0;
559			}
560
561			int user_online_exp(MYSQL *db)
562			{
563			char sql[SQL_BUFFER_LEN];
564
565	sysadm	1.56	// +1 exp for every 5 minutes online since last logout
566			// but at most 24 hours worth of exp can be gained in Telnet session
567			snprintf(sql, sizeof(sql),
568	sysadm	1.60	"UPDATE user_pubinfo SET exp = exp + FLOOR(LEAST(TIMESTAMPDIFF("
569			"SECOND, GREATEST(last_login_dt, IF(last_logout_dt IS NULL, last_login_dt, last_logout_dt)), NOW()"
570			") / 60 / 5, 12 * 24)), last_logout_dt = NOW() "
571			"WHERE UID = %d",
572			BBS_priv.uid);
573	sysadm	1.56	if (mysql_query(db, sql) != 0)
574			{
575	sysadm	1.75	log_error("Update user_pubinfo error: %s", mysql_error(db));
576	sysadm	1.56	return -1;
577			}
578	sysadm	1.15
579			return 0;
580			}
581	sysadm	1.47
582			int user_online_update(const char *action)
583			{
584			MYSQL *db = NULL;
585			char sql[SQL_BUFFER_LEN];
586
587	sysadm	1.55	if ((action == NULL \|\| strcmp(BBS_current_action, action) == 0) &&
588	sysadm	1.54	time(NULL) - BBS_current_action_tm < BBS_current_action_refresh_interval) // No change
589	sysadm	1.47	{
590			return 0;
591			}
592
593	sysadm	1.55	if (action != NULL)
594			{
595			strncpy(BBS_current_action, action, sizeof(BBS_current_action) - 1);
596			BBS_current_action[sizeof(BBS_current_action) - 1] = '\0';
597			}
598
599	sysadm	1.54	BBS_current_action_tm = time(NULL);
600	sysadm	1.47
601			db = db_open();
602			if (db == NULL)
603			{
604	sysadm	1.75	log_error("db_open() error: %s", mysql_error(db));
605	sysadm	1.47	return -1;
606			}
607
608			snprintf(sql, sizeof(sql),
609	sysadm	1.62	"UPDATE user_online SET current_action = '%s', last_tm = NOW() "
610	sysadm	1.47	"WHERE SID = 'Telnet_Process_%d'",
611			BBS_current_action, getpid());
612			if (mysql_query(db, sql) != 0)
613			{
614	sysadm	1.75	log_error("Update user_online error: %s", mysql_error(db));
615	sysadm	1.47	return -2;
616			}
617
618			mysql_close(db);
619
620			return 1;
621			}
622	sysadm	1.74
623			int user_update_agreement(void)
624			{
625			MYSQL *db = NULL;
626			char sql[SQL_BUFFER_LEN];
627			int ch;
628			int ret = 0;
629
630			clearscr();
631			moveto(2, 1);
632			prints("尊敬的用户：");
633			moveto(3, 1);
634			prints(" 本站的《用户许可协议》已更新，您必须在仔细阅读并接受后，才能继续使用本站提供的服务。");
635			press_any_key();
636
637			clearscr();
638			display_file(DATA_EULA, 1);
639
640			while (!SYS_server_exit)
641			{
642			clearscr();
643			moveto(2, 1);
644
645			ch = press_any_key_ex("您是否接受本站的《用户许可协议》? (A)接受, (D)拒绝, (R)再看看协议 [D]", 60);
646			switch (toupper(ch))
647			{
648			case KEY_NULL:
649			return -1;
650			case KEY_TIMEOUT:
651			case CR:
652			case 'D':
653			moveto(3, 1);
654			prints("您已拒绝《用户许可协议》，再见！");
655			press_any_key();
656			return 0;
657			case 'R':
658			clearscr();
659			display_file(DATA_EULA, 1);
660			continue;
661			case 'A':
662			db = db_open();
663			if (db == NULL)
664			{
665			ret = -1;
666			goto cleanup;
667			}
668
669			snprintf(sql, sizeof(sql),
670			"UPDATE user_pubinfo SET visit_count = visit_count + 1, "
671			"last_login_dt = NOW() WHERE UID = %d",
672			BBS_priv.uid);
673			if (mysql_query(db, sql) != 0)
674			{
675	sysadm	1.75	log_error("Update user_pubinfo error: %s", mysql_error(db));
676	sysadm	1.74	ret = -1;
677			goto cleanup;
678			}
679
680			mysql_close(db);
681			db = NULL;
682
683			moveto(3, 1);
684			prints("您已接受《用户许可协议》，请重新登陆。");
685			press_any_key();
686			return 1;
687			default:
688			continue;
689			}
690
691			break;
692			}
693
694			cleanup:
695			mysql_close(db);
696
697			return ret;
698			}
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