/*

 * SPDX-License-Identifier: ISC

 *

 * Copyright (c) 2009-2020 Todd C. Miller <Todd.Miller@sudo.ws>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

/*

 * This is an open source non-commercial project. Dear PVS-Studio, please check it.

 * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com

 */

#include <config.h>

#include <stdio.h>

#include <stdlib.h>

#ifdef HAVE_STDBOOL_H

# include <stdbool.h>

#else

# include <compat/stdbool.h>

#endif /* HAVE_STDBOOL_H */

#include <string.h>

#include <signal.h>

#include <limits.h>

#include <time.h>

#include <sudo_compat.h>

#include <sudo_debug.h>

#include <sudo_eventlog.h>

#include <sudo_fatal.h>

#include <sudo_gettext.h>

#include <sudo_iolog.h>

#include <sudo_util.h>

bool

iolog_parse_loginfo_legacy(FILE *fp, const char *iolog_dir,

    struct eventlog *evlog)

{

    char *buf = NULL, *cp, *ep;

    const char *errstr;

    size_t bufsize = 0, cwdsize = 0, cmdsize = 0;

    bool ret = false;

    debug_decl(iolog_parse_loginfo_legacy, SUDO_DEBUG_UTIL);

    /*

     * Info file has three lines:

     *  1) a log info line

     *  2) cwd

     *  3) command with args

     */

    if (getdelim(&buf, &bufsize, '\n', fp) == -1 ||

  getdelim(&evlog->cwd, &cwdsize, '\n', fp) == -1 ||

  getdelim(&evlog->command, &cmdsize, '\n', fp) == -1) {

  sudo_warn(U_("%s: invalid log file"), iolog_dir);

  goto done;

    }

    /* Strip the newline from the cwd and command. */

    evlog->cwd[strcspn(evlog->cwd, "\n")] = '\0';

    evlog->command[strcspn(evlog->command, "\n")] = '\0';

    /*

     * Crack the log line (lines and cols not present in old versions).

     *  timestamp:user:runas_user:runas_group:tty:lines:cols

     * XXX - probably better to use strtok and switch on the state.

     */

    buf[strcspn(buf, "\n")] = '\0';

    cp = buf;

    /* timestamp */

    if ((ep = strchr(cp, ':')) == NULL) {

  sudo_warn(U_("%s: time stamp field is missing"), iolog_dir);

  goto done;

    }

    *ep = '\0';

    evlog->event_time.tv_sec =

  (time_t)sudo_strtonum(cp, 0, TIME_T_MAX, &errstr);

    if (errstr != NULL) {

  sudo_warn(U_("%s: time stamp %s: %s"), iolog_dir, cp, errstr);

  goto done;

    }

    /* submit user */

    cp = ep + 1;

    if ((ep = strchr(cp, ':')) == NULL) {

  sudo_warn(U_("%s: user field is missing"), iolog_dir);

  goto done;

    }

    if ((evlog->submituser = strndup(cp, (size_t)(ep - cp))) == NULL) {

  sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));

  goto done;

    }

    /* runas user */

    cp = ep + 1;

    if ((ep = strchr(cp, ':')) == NULL) {

  sudo_warn(U_("%s: runas user field is missing"), iolog_dir);

  goto done;

    }

    if ((evlog->runuser = strndup(cp, (size_t)(ep - cp))) == NULL) {

  sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));

  goto done;

    }

    /* runas group */

    cp = ep + 1;

    if ((ep = strchr(cp, ':')) == NULL) {

  sudo_warn(U_("%s: runas group field is missing"), iolog_dir);

  goto done;

    }

    if (cp != ep) {

  if ((evlog->rungroup = strndup(cp, (size_t)(ep - cp))) == NULL) {

      sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));

      goto done;

  }

    }

    /* tty, followed by optional lines + cols */

    cp = ep + 1;

    if ((ep = strchr(cp, ':')) == NULL) {

  /* just the tty */

  if ((evlog->ttyname = strdup(cp)) == NULL) {

      sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));

      goto done;

  }

    } else {

  /* tty followed by lines + cols */

  if ((evlog->ttyname = strndup(cp, (size_t)(ep - cp))) == NULL) {

      sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));

      goto done;

  }

  cp = ep + 1;

  /* need to NULL out separator to use sudo_strtonum() */

  /* XXX - use sudo_strtonumx */

  if ((ep = strchr(cp, ':')) != NULL) {

      *ep = '\0';

  }

  evlog->lines = (int)sudo_strtonum(cp, 1, INT_MAX, &errstr);

  if (errstr != NULL) {

      sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,

    "%s: tty lines %s: %s", iolog_dir, cp, errstr);

  }

  if (ep != NULL) {

      cp = ep + 1;

      evlog->columns = (int)sudo_strtonum(cp, 1, INT_MAX, &errstr);

      if (errstr != NULL) {

    sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,

        "%s: tty cols %s: %s", iolog_dir, cp, errstr);

      }

  }

    }

    ret = true;

done:

    free(buf);

    debug_return_bool(ret);

}