blob: 2a53deb21fcd5230a7fd543f56c33ab20455a7cf [file] [log] [blame]
/*
* User authentication & authorization
*
* Copyright 2010 Krzysztof Piotr Oledzki <ole@ans.pl>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#ifdef CONFIG_HAP_CRYPT
/* This is to have crypt() defined on Linux */
#define _GNU_SOURCE
#ifdef NEED_CRYPT_H
/* some platforms such as Solaris need this */
#include <crypt.h>
#endif
#endif /* CONFIG_HAP_CRYPT */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <common/config.h>
#include <common/errors.h>
#include <proto/acl.h>
#include <proto/log.h>
#include <types/auth.h>
#include <types/pattern.h>
struct userlist *userlist = NULL; /* list of all existing userlists */
/* find targets for selected gropus. The function returns pointer to
* the userlist struct ot NULL if name is NULL/empty or unresolvable.
*/
struct userlist *
auth_find_userlist(char *name)
{
struct userlist *l;
if (!name || !*name)
return NULL;
for (l = userlist; l; l = l->next)
if (!strcmp(l->name, name))
return l;
return NULL;
}
int check_group(struct userlist *ul, char *name)
{
struct auth_groups *ag;
for (ag = ul->groups; ag; ag = ag->next)
if (strcmp(name, ag->name) == 0)
return 1;
return 0;
}
void
userlist_free(struct userlist *ul)
{
struct userlist *tul;
struct auth_users *au, *tau;
struct auth_groups_list *agl, *tagl;
struct auth_groups *ag, *tag;
while (ul) {
/* Free users. */
au = ul->users;
while (au) {
/* Free groups that own current user. */
agl = au->u.groups;
while (agl) {
tagl = agl;
agl = agl->next;
free(tagl);
}
tau = au;
au = au->next;
free(tau->user);
free(tau->pass);
free(tau);
}
/* Free grouplist. */
ag = ul->groups;
while (ag) {
tag = ag;
ag = ag->next;
free(tag->name);
free(tag);
}
tul = ul;
ul = ul->next;
free(tul->name);
free(tul);
};
}
int userlist_postinit()
{
struct userlist *curuserlist = NULL;
/* Resolve usernames and groupnames. */
for (curuserlist = userlist; curuserlist; curuserlist = curuserlist->next) {
struct auth_groups *ag;
struct auth_users *curuser;
struct auth_groups_list *grl;
for (curuser = curuserlist->users; curuser; curuser = curuser->next) {
char *group = NULL;
struct auth_groups_list *groups = NULL;
if (!curuser->u.groups_names)
continue;
while ((group = strtok(group?NULL:curuser->u.groups_names, ","))) {
for (ag = curuserlist->groups; ag; ag = ag->next) {
if (!strcmp(ag->name, group))
break;
}
if (!ag) {
Alert("userlist '%s': no such group '%s' specified in user '%s'\n",
curuserlist->name, group, curuser->user);
return ERR_ALERT | ERR_FATAL;
}
/* Add this group at the group userlist. */
grl = calloc(1, sizeof(*grl));
if (!grl) {
Alert("userlist '%s': no more memory when trying to allocate the user groups.\n",
curuserlist->name);
return ERR_ALERT | ERR_FATAL;
}
grl->group = ag;
grl->next = groups;
groups = grl;
}
free(curuser->u.groups);
curuser->u.groups = groups;
}
for (ag = curuserlist->groups; ag; ag = ag->next) {
char *user = NULL;
if (!ag->groupusers)
continue;
while ((user = strtok(user?NULL:ag->groupusers, ","))) {
for (curuser = curuserlist->users; curuser; curuser = curuser->next) {
if (!strcmp(curuser->user, user))
break;
}
if (!curuser) {
Alert("userlist '%s': no such user '%s' specified in group '%s'\n",
curuserlist->name, user, ag->name);
return ERR_ALERT | ERR_FATAL;
}
/* Add this group at the group userlist. */
grl = calloc(1, sizeof(*grl));
if (!grl) {
Alert("userlist '%s': no more memory when trying to allocate the user groups.\n",
curuserlist->name);
return ERR_ALERT | ERR_FATAL;
}
grl->group = ag;
grl->next = curuser->u.groups;
curuser->u.groups = grl;
}
free(ag->groupusers);
ag->groupusers = NULL;
}
#ifdef DEBUG_AUTH
for (ag = curuserlist->groups; ag; ag = ag->next) {
struct auth_groups_list *agl;
fprintf(stderr, "group %s, id %p, users:", ag->name, ag);
for (curuser = curuserlist->users; curuser; curuser = curuser->next) {
for (agl = curuser->u.groups; agl; agl = agl->next) {
if (agl->group == ag)
fprintf(stderr, " %s", curuser->user);
}
}
fprintf(stderr, "\n");
}
#endif
}
return ERR_NONE;
}
/*
* Authenticate and authorize user; return 1 if OK, 0 if case of error.
*/
int
check_user(struct userlist *ul, const char *user, const char *pass)
{
struct auth_users *u;
const char *ep;
#ifdef DEBUG_AUTH
fprintf(stderr, "req: userlist=%s, user=%s, pass=%s, group=%s\n",
ul->name, user, pass, group);
#endif
for (u = ul->users; u; u = u->next)
if (!strcmp(user, u->user))
break;
if (!u)
return 0;
#ifdef DEBUG_AUTH
fprintf(stderr, "cfg: user=%s, pass=%s, flags=%X, groups=",
u->user, u->pass, u->flags);
for (agl = u->u.groups; agl; agl = agl->next)
fprintf(stderr, " %s", agl->group->name);
#endif
if (!(u->flags & AU_O_INSECURE)) {
#ifdef CONFIG_HAP_CRYPT
ep = crypt(pass, u->pass);
#else
return 0;
#endif
} else
ep = pass;
#ifdef DEBUG_AUTH
fprintf(stderr, ", crypt=%s\n", ep);
#endif
if (!strcmp(ep, u->pass))
return 1;
else
return 0;
}
struct pattern *
pat_match_auth(struct sample *smp, struct pattern_expr *expr, int fill)
{
struct userlist *ul = smp->ctx.a[0];
struct pattern_list *lst;
struct auth_users *u;
struct auth_groups_list *agl;
struct pattern *pattern;
/* Check if the userlist is present in the context data. */
if (!ul)
return NULL;
/* Browse the userlist for searching user. */
for (u = ul->users; u; u = u->next) {
if (strcmp(smp->data.str.str, u->user) == 0)
break;
}
if (!u)
return NULL;
/* Browse each pattern. */
list_for_each_entry(lst, &expr->patterns, list) {
pattern = &lst->pat;
/* Browse each group for searching group name that match the pattern. */
for (agl = u->u.groups; agl; agl = agl->next) {
if (strcmp(agl->group->name, pattern->ptr.str) == 0)
return pattern;
}
}
return NULL;
}