path: root/mbbsd/register.c

/* $Id$ */
#include "bbs.h"

// prototype of crypt()
char *crypt(const char *key, const char *salt);

char           *
genpasswd(char *pw)
{
    if (pw[0]) {
    char            saltc[2], c;
    int             i;

    i = 9 * getpid();
    saltc[0] = i & 077;
    saltc[1] = (i >> 6) & 077;

    for (i = 0; i < 2; i++) {
        c = saltc[i] + '.';
        if (c > '9')
        c += 7;
        if (c > 'Z')
        c += 6;
        saltc[i] = c;
    }
    return crypt(pw, saltc);
    }
    return "";
}

// NOTE it will clean string in "plain"
int
checkpasswd(const char *passwd, char *plain)
{
    int             ok;
    char           *pw;

    ok = 0;
    pw = crypt(plain, passwd);
    if(pw && strcmp(pw, passwd)==0)
    ok = 1;
    memset(plain, 0, strlen(plain));

    return ok;
}

/* 檢查 user 註冊情況 */
int
bad_user_id(const char *userid)
{
    if(!is_validuserid(userid))
    return 1;

    if (strcasecmp(userid, str_new) == 0)
    return 1;

#ifdef NO_GUEST_ACCOUNT_REG
    if (strcasecmp(userid, STR_GUEST) == 0)
    return 1;
#endif

    /* in2: 原本是用strcasestr,
            不過有些人中間剛剛好出現這個字應該還算合理吧? */
    if( strncasecmp(userid, "fuck", 4) == 0 ||
        strncasecmp(userid, "shit", 4) == 0 )
    return 1;

    /*
     * while((ch = *(++userid))) if(not_alnum(ch)) return 1;
     */
    return 0;
}

/* -------------------------------- */
/* New policy for allocate new user */
/* (a) is the worst user currently  */
/* (b) is the object to be compared */
/* -------------------------------- */
static int
compute_user_value(const userec_t * urec, time4_t clock)
{
    int             value;

    /* if (urec) has XEMPT permission, don't kick it */
    if ((urec->userid[0] == '\0') || (urec->userlevel & PERM_XEMPT)
    /* || (urec->userlevel & PERM_LOGINOK) */
    || !strcmp(STR_GUEST, urec->userid))
    return 999999;
    value = (clock - urec->lastlogin) / 60; /* minutes */

    /* new user should register in 30 mins */
    // XXX 目前 new acccount 並不會在 utmp 裡放 str_new...
    if (strcmp(urec->userid, str_new) == 0)
    return 30 - value;

#if 0
    if (!urec->numlogins)   /* 未 login 成功者，不保留 */
    return -1;
    if (urec->numlogins <= 3)   /* #login 少於三者，保留 20 天 */
    return 20 * 24 * 60 - value;
#endif
    /* 未完成註冊者，保留 15 天 */
    /* 一般情況，保留 120 天 */
    return (urec->userlevel & PERM_LOGINOK ? 120 : 15) * 24 * 60 - value;
}

int
check_and_expire_account(int uid, const userec_t * urec)
{
    char            genbuf[200];
    int             val;
    if ((val = compute_user_value(urec, now)) < 0) {
    snprintf(genbuf, sizeof(genbuf), "#%d %-12s %15.15s %d %d %d",
         uid, urec->userid, ctime4(&(urec->lastlogin)) + 4,
         urec->numlogins, urec->numposts, val);
    if (val > -1 * 60 * 24 * 365) {
        log_usies("CLEAN", genbuf);
            kill_user(uid, urec->userid);
    } else {
        val = 0;
        log_usies("DATED", genbuf);
    }
    }
    return val;
}


int
setupnewuser(const userec_t *user)
{
    char            genbuf[50];
    char           *fn_fresh = ".fresh";
    userec_t        utmp;
    time_t          clock;
    struct stat     st;
    int             fd, uid;

    clock = now;

    // XXX race condition...
    if (dosearchuser(user->userid, NULL))
    {
    vmsg("手腳不夠快，別人已經搶走了！");
    exit(1);
    }

    /* Lazy method : 先找尋已經清除的過期帳號 */
    if ((uid = dosearchuser("", NULL)) == 0) {
    /* 每 1 個小時，清理 user 帳號一次 */
    if ((stat(fn_fresh, &st) == -1) || (st.st_mtime < clock - 3600)) {
        if ((fd = open(fn_fresh, O_RDWR | O_CREAT, 0600)) == -1)
        return -1;
        write(fd, ctime(&clock), 25);
        close(fd);
        log_usies("CLEAN", "dated users");

        fprintf(stdout, "尋找新帳號中, 請稍待片刻...\n\r");

        if ((fd = open(fn_passwd, O_RDWR | O_CREAT, 0600)) == -1)
        return -1;

        /* 不曉得為什麼要從 2 開始... Ptt:因為SYSOP在1 */
        for (uid = 2; uid <= MAX_USERS; uid++) {
        passwd_query(uid, &utmp);
        check_and_expire_account(uid, &utmp);
        }
    }
    }

    /* initialize passwd semaphores */
    if (passwd_init())
    exit(1);

    passwd_lock();

    uid = dosearchuser("", NULL);
    if ((uid <= 0) || (uid > MAX_USERS)) {
    passwd_unlock();
    vmsg("抱歉，使用者帳號已經滿了，無法註冊新的帳號");
    exit(1);
    }

    setuserid(uid, user->userid);
    snprintf(genbuf, sizeof(genbuf), "uid %d", uid);
    log_usies("APPLY", genbuf);

    SHM->money[uid - 1] = user->money;

    if (passwd_update(uid, (userec_t *)user) == -1) {
    passwd_unlock();
    vmsg("客滿了，再見！");
    exit(1);
    }

    passwd_unlock();

    return uid;
}

// checking functions (in user.c now...)
char *isvalidname(char *rname);

void
new_register(void)
{
    userec_t        newuser;
    char            passbuf[STRLEN];
    int             try, id, uid;
    char       *errmsg = NULL;

#ifdef HAVE_USERAGREEMENT
    more(HAVE_USERAGREEMENT, YEA);
    while( 1 ){
    getdata(b_lines, 0, "請問您接受這份使用者條款嗎? (yes/no) ",
        passbuf, 4, LCECHO);
    if( passbuf[0] == 'y' )
        break;
    if( passbuf[0] == 'n' ){
        vmsg("抱歉, 您須要接受使用者條款才能註冊帳號享受我們的服務唷!");
        exit(1);
    }
    vmsg("請輸入 y表示接受, n表示不接受");
    }
#endif

    // setup newuser
    memset(&newuser, 0, sizeof(newuser));
    newuser.version = PASSWD_VERSION;
    newuser.userlevel = PERM_DEFAULT;
    newuser.uflag = BRDSORT_FLAG | MOVIE_FLAG;
    newuser.uflag2 = 0;
    newuser.firstlogin = newuser.lastlogin = now;
    newuser.money = 0;
    newuser.pager = PAGER_ON;
    strlcpy(newuser.lasthost, fromhost, sizeof(newuser.lasthost));

#ifdef DBCSAWARE
    if(u_detectDBCSAwareEvilClient())
    newuser.uflag &= ~DBCSAWARE_FLAG;
    else
    newuser.uflag |= DBCSAWARE_FLAG;
#endif

    more("etc/register", NA);
    try = 0;
    while (1) {
        userec_t xuser;
    int minute;

    if (++try >= 6) {
        vmsg("您嘗試錯誤的輸入太多，請下次再來吧");
        exit(1);
    }
    getdata(17, 0, msg_uid, newuser.userid,
        sizeof(newuser.userid), DOECHO);
        strcpy(passbuf, newuser.userid);

    if (bad_user_id(passbuf))
        outs("無法接受這個代號，請使用英文字母，並且不要包含空格\n");
    else if ((id = getuser(passbuf, &xuser)) &&
         (minute = check_and_expire_account(id, &xuser)) >= 0) {
        if (minute == 999999) // XXX magic number.  It should be greater than MAX_USERS at least.
        outs("此代號已經有人使用 是不死之身");
        else {
        prints("此代號已經有人使用 還有 %d 天才過期 \n", 
            minute / (60 * 24) + 1);
        }
    } else
        break;
    }

    // XXX 記得最後 create account 前還要再檢查一次 acc

    try = 0;
    while (1) {
    if (++try >= 6) {
        vmsg("您嘗試錯誤的輸入太多，請下次再來吧");
        exit(1);
    }
    move(19, 0); clrtoeol();
    outs(ANSI_COLOR(1;33) "為避免被偷看，您的密碼並不會顯示在畫面上，直接輸入完後按 Enter 鍵即可。" ANSI_RESET);
    if ((getdata(18, 0, "請設定密碼：", passbuf,
             sizeof(passbuf), NOECHO) < 3) ||
        !strcmp(passbuf, newuser.userid)) {
        outs("密碼太簡單，易遭入侵，至少要 4 個字，請重新輸入\n");
        continue;
    }
    strlcpy(newuser.passwd, passbuf, PASSLEN);
    getdata(19, 0, "請檢查密碼：", passbuf, sizeof(passbuf), NOECHO);
    if (strncmp(passbuf, newuser.passwd, PASSLEN)) {
        outs("密碼輸入錯誤, 請重新輸入密碼.\n");
        continue;
    }
    passbuf[8] = '\0';
    strlcpy(newuser.passwd, genpasswd(passbuf), PASSLEN);
    break;
    }
    // set-up more information.

    // warning: because currutmp=NULL, we can simply pass newuser.* to getdata.
    // DON'T DO THIS IF YOUR currutmp != NULL.
    try = 0;
    while (strlen(newuser.nickname) < 2)
    {
    if (++try > 10) {
        vmsg("您嘗試錯誤的輸入太多，請下次再來吧");
        exit(1);
    }
    getdata(19, 0, "綽號暱稱：", newuser.nickname,
        sizeof(newuser.nickname), DOECHO);
    }

    try = 0;
    while (strlen(newuser.realname) < 4)
    {
    if (++try > 10) {
        vmsg("您嘗試錯誤的輸入太多，請下次再來吧");
        exit(1);
    }
    getdata(20, 0, "真實姓名：", newuser.realname,
        sizeof(newuser.realname), DOECHO);

    if ((errmsg = isvalidname(newuser.realname)))
    {
        memset(newuser.realname, 0, sizeof(newuser.realname));
        vmsg(errmsg); 
    }
    }

    try = 0;
    while (strlen(newuser.address) < 8)
    {
    // do not use isvalidaddr to check,
    // because that requires foreign info.
    if (++try > 10) {
        vmsg("您嘗試錯誤的輸入太多，請下次再來吧");
        exit(1);
    }
    getdata(21, 0, "聯絡地址：", newuser.address,
        sizeof(newuser.address), DOECHO);
    }

    try = 0;
    while (newuser.year < 40) // magic number 40: see user.c
    {
    char birthday[sizeof("mmmm/yy/dd ")];
    int y, m, d;

    if (++try > 20) {
        vmsg("您嘗試錯誤的輸入太多，請下次再來吧");
        exit(1);
    }
    getdata(22, 0, "生日 (西元年/月/日, 如 1984/02/29)：", birthday,
        sizeof(birthday), DOECHO);

    if (ParseDate(birthday, &y, &m, &d)) {
        vmsg("日期格式不正確");
        continue;
    } else if (y < 1940) {
        vmsg("你真的有那麼老嗎？");
        continue;
    }
    newuser.year  = (unsigned char)(y-1900);
    newuser.month = (unsigned char)m;
    newuser.day   = (unsigned char)d;
    }

    setupnewuser(&newuser);

    if( (uid = initcuser(newuser.userid)) < 0) {
    vmsg("無法建立帳號");
    exit(1);
    }
    log_usies("REGISTER", fromhost);
}


void
check_register(void)
{

    if (HasUserPerm(PERM_LOGINOK))
    return;

    /* 
     * 避免使用者被退回註冊單後，在知道退回的原因之前，
     * 又送出一次註冊單。
     */ 
    if (ISNEWMAIL(currutmp))
    m_read();

    if (!HasUserPerm(PERM_SYSOP)) {
    /* 回覆過身份認證信函，或曾經 E-mail post 過 */
    clear();
    move(9, 3);
    outs("請詳填寫" ANSI_COLOR(32) "註冊申請單" ANSI_RESET "，"
           "通告站長以獲得進階使用權力。\n\n\n\n");
    u_register();

#ifdef NEWUSER_LIMIT
    if (cuser.lastlogin - cuser->firstlogin < 3 * 86400)
        cuser.userlevel &= ~PERM_POST;
    more("etc/newuser", YEA);
#endif
    }
}
/* vim:sw=4
 */