GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/ssh/sshd/../groupaccess.c Lines: 0 23 0.0 %
Date: 2017-11-13 Branches: 0 23 0.0 %

Line Branch Exec Source
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/* $OpenBSD: groupaccess.c,v 1.16 2015/05/04 06:10:48 djm Exp $ */
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/*
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 * Copyright (c) 2001 Kevin Steves.  All rights reserved.
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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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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <sys/types.h>
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#include <grp.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "xmalloc.h"
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#include "groupaccess.h"
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#include "match.h"
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#include "log.h"
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static int ngroups;
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static char *groups_byname[NGROUPS_MAX + 1];	/* +1 for base/primary group */
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/*
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 * Initialize group access list for user with primary (base) and
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 * supplementary groups.  Return the number of groups in the list.
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 */
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int
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ga_init(const char *user, gid_t base)
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{
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	gid_t groups_bygid[NGROUPS_MAX + 1];
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	int i, j;
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	struct group *gr;
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	if (ngroups > 0)
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		ga_free();
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	ngroups = sizeof(groups_bygid) / sizeof(gid_t);
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	if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
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		logit("getgrouplist: groups list too small");
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	for (i = 0, j = 0; i < ngroups; i++)
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		if ((gr = getgrgid(groups_bygid[i])) != NULL)
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			groups_byname[j++] = xstrdup(gr->gr_name);
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	return (ngroups = j);
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}
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/*
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 * Return 1 if one of user's groups is contained in groups.
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 * Return 0 otherwise.  Use match_pattern() for string comparison.
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 */
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int
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ga_match(char * const *groups, int n)
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{
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	int i, j;
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	for (i = 0; i < ngroups; i++)
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		for (j = 0; j < n; j++)
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			if (match_pattern(groups_byname[i], groups[j]))
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				return 1;
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	return 0;
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}
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/*
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 * Return 1 if one of user's groups matches group_pattern list.
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 * Return 0 on negated or no match.
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 */
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int
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ga_match_pattern_list(const char *group_pattern)
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{
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	int i, found = 0;
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	for (i = 0; i < ngroups; i++) {
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		switch (match_pattern_list(groups_byname[i], group_pattern, 0)) {
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		case -1:
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			return 0;	/* Negated match wins */
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		case 0:
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			continue;
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		case 1:
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			found = 1;
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		}
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	}
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	return found;
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}
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/*
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 * Free memory allocated for group access list.
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 */
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void
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ga_free(void)
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{
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	int i;
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	if (ngroups > 0) {
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		for (i = 0; i < ngroups; i++)
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			free(groups_byname[i]);
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		ngroups = 0;
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	}
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}