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Annotation of src/usr.bin/ssh/groupaccess.c, Revision 1.3.2.5

1.3.2.5 ! miod        1: /*     $OpenBSD: groupaccess.c,v 1.4 2001/06/26 17:27:23 markus Exp $  */
1.3       niklas      2:
1.1       markus      3: /*
                      4:  * Copyright (c) 2001 Kevin Steves.  All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  * 2. Redistributions in binary form must reproduce the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer in the
                     13:  *    documentation and/or other materials provided with the distribution.
                     14:  *
                     15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     17:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     18:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     19:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     20:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     21:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     22:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     23:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     24:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     25:  */
                     26:
                     27: #include "includes.h"
                     28:
                     29: #include "groupaccess.h"
                     30: #include "xmalloc.h"
                     31: #include "match.h"
1.2       markus     32: #include "log.h"
1.1       markus     33:
                     34: static int ngroups;
                     35: static char *groups_byname[NGROUPS_MAX + 1];   /* +1 for base/primary group */
                     36:
1.3.2.5 ! miod       37: /*
        !            38:  * Initialize group access list for user with primary (base) and
        !            39:  * supplementary groups.  Return the number of groups in the list.
        !            40:  */
1.1       markus     41: int
                     42: ga_init(const char *user, gid_t base)
                     43: {
                     44:        gid_t groups_bygid[NGROUPS_MAX + 1];
                     45:        int i, j;
                     46:        struct group *gr;
                     47:
                     48:        if (ngroups > 0)
                     49:                ga_free();
                     50:
                     51:        ngroups = sizeof(groups_bygid) / sizeof(gid_t);
                     52:        if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
                     53:                log("getgrouplist: groups list too small");
                     54:        for (i = 0, j = 0; i < ngroups; i++)
                     55:                if ((gr = getgrgid(groups_bygid[i])) != NULL)
                     56:                        groups_byname[j++] = xstrdup(gr->gr_name);
                     57:        return (ngroups = j);
                     58: }
                     59:
1.3.2.5 ! miod       60: /*
        !            61:  * Return 1 if one of user's groups is contained in groups.
        !            62:  * Return 0 otherwise.  Use match_pattern() for string comparison.
        !            63:  */
1.1       markus     64: int
                     65: ga_match(char * const *groups, int n)
                     66: {
                     67:        int i, j;
                     68:
                     69:        for (i = 0; i < ngroups; i++)
                     70:                for (j = 0; j < n; j++)
                     71:                        if (match_pattern(groups_byname[i], groups[j]))
                     72:                                return 1;
                     73:        return 0;
                     74: }
                     75:
1.3.2.5 ! miod       76: /*
        !            77:  * Free memory allocated for group access list.
        !            78:  */
1.1       markus     79: void
                     80: ga_free(void)
                     81: {
                     82:        int i;
                     83:
                     84:        if (ngroups > 0) {
                     85:                for (i = 0; i < ngroups; i++)
                     86:                        xfree(groups_byname[i]);
                     87:                ngroups = 0;
                     88:        }
                     89: }