116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*-
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* Copyright (c) 2001 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <ctype.h>
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#include <grp.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define PAM_SM_ACCOUNT
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#include <security/pam_appl.h>
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#include <security/pam_modules.h>
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#include <security/pam_mod_misc.h>
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#include <security/openpam.h>
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PAM_EXTERN int
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pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused,
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int argc __unused, const char *argv[] __unused)
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{
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struct passwd *pwd;
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struct group *grp;
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const char *user;
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int pam_err, found, allow;
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char *line, *name, **mem;
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size_t len, ulen;
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FILE *f;
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pam_err = pam_get_user(pamh, &user, NULL);
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if (pam_err != PAM_SUCCESS)
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return (pam_err);
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if (user == NULL || (pwd = getpwnam(user)) == NULL)
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return (PAM_SERVICE_ERR);
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found = 0;
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ulen = strlen(user);
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if ((f = fopen(_PATH_FTPUSERS, "r")) == NULL) {
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PAM_LOG("%s: %m", _PATH_FTPUSERS);
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goto done;
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}
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while (!found && (line = fgetln(f, &len)) != NULL) {
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if (*line == '#')
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continue;
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while (len > 0 && isspace(line[len - 1]))
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--len;
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if (len == 0)
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continue;
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/* simple case first */
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if (*line != '@') {
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if (len == ulen && strncmp(user, line, len) == 0)
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found = 1;
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continue;
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}
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/* member of specified group? */
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asprintf(&name, "%.*s", (int)len - 1, line + 1);
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if (name == NULL) {
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fclose(f);
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return (PAM_BUF_ERR);
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}
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grp = getgrnam(name);
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free(name);
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if (grp == NULL)
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continue;
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for (mem = grp->gr_mem; mem && *mem && !found; ++mem)
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if (strcmp(user, *mem) == 0)
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found = 1;
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}
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done:
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allow = (openpam_get_option(pamh, "disallow") == NULL);
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if (found)
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pam_err = allow ? PAM_SUCCESS : PAM_AUTH_ERR;
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else
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pam_err = allow ? PAM_AUTH_ERR : PAM_SUCCESS;
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if (f != NULL)
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fclose(f);
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return (pam_err);
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}
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PAM_MODULE_ENTRY("pam_ftpusers");
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