summaryrefslogtreecommitdiff
path: root/src/providers/ipa/ipa_hbac_rules.c
blob: 43e1e42634ac638324f3bc0d6e99e9814a283924 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/*
    SSSD

    Authors:
        Stephen Gallagher <sgallagh@redhat.com>

    Copyright (C) 2011 Red Hat

    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 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "util/util.h"
#include "providers/ipa/ipa_hbac_private.h"
#include "providers/ldap/sdap_async.h"

struct ipa_hbac_rule_state {
    struct sdap_options *opts;

    size_t rule_count;
    struct sysdb_attrs **rules;
};

static void
ipa_hbac_rule_info_done(struct tevent_req *subreq);

struct tevent_req *
ipa_hbac_rule_info_send(TALLOC_CTX *mem_ctx,
                        bool get_deny_rules,
                        struct tevent_context *ev,
                        struct sysdb_ctx *sysdb,
                        struct sss_domain_info *dom,
                        struct sdap_handle *sh,
                        struct sdap_options *opts,
                        const char *search_base,
                        struct sysdb_attrs *ipa_host)
{
    errno_t ret;
    size_t i;
    struct tevent_req *req = NULL;
    struct tevent_req *subreq;
    struct ipa_hbac_rule_state *state;
    TALLOC_CTX *tmp_ctx;
    const char *host_dn;
    char *host_dn_clean;
    char *host_group_clean;
    char *rule_filter;
    const char **memberof_list;
    const char *rule_attrs[] = { OBJECTCLASS,
                                 IPA_CN,
                                 IPA_UNIQUE_ID,
                                 IPA_ENABLED_FLAG,
                                 IPA_ACCESS_RULE_TYPE,
                                 IPA_MEMBER_USER,
                                 IPA_USER_CATEGORY,
                                 IPA_MEMBER_SERVICE,
                                 IPA_SERVICE_CATEGORY,
                                 IPA_SOURCE_HOST,
                                 IPA_SOURCE_HOST_CATEGORY,
                                 IPA_EXTERNAL_HOST,
                                 IPA_MEMBER_HOST,
                                 IPA_HOST_CATEGORY,
                                 NULL };

    if (ipa_host == NULL) {
        DEBUG(1, ("Missing host\n"));
        return NULL;
    }

    tmp_ctx = talloc_new(mem_ctx);
    if (tmp_ctx == NULL) return NULL;

    ret = sysdb_attrs_get_string(ipa_host, SYSDB_ORIG_DN, &host_dn);
    if (ret != EOK) {
        DEBUG(1, ("Could not identify IPA hostname\n"));
        goto error;
    }

    ret = sss_filter_sanitize(tmp_ctx, host_dn, &host_dn_clean);
    if (ret != EOK) goto error;

    req = tevent_req_create(mem_ctx, &state, struct ipa_hbac_rule_state);
    if (req == NULL) {
        DEBUG(1, ("tevent_req_create failed.\n"));
        return NULL;
    }

    state->opts = opts;

    if (get_deny_rules) {
        rule_filter = talloc_asprintf(tmp_ctx,
                                      "(&(objectclass=%s)"
                                      "(%s=%s)(|(%s=%s)(%s=%s)",
                                      IPA_HBAC_RULE,
                                      IPA_ENABLED_FLAG, IPA_TRUE_VALUE,
                                      IPA_HOST_CATEGORY, "all",
                                      IPA_MEMBER_HOST, host_dn_clean);
    } else {
        rule_filter = talloc_asprintf(tmp_ctx,
                                      "(&(objectclass=%s)"
                                      "(%s=%s)(%s=%s)"
                                      "(|(%s=%s)(%s=%s)",
                                      IPA_HBAC_RULE,
                                      IPA_ENABLED_FLAG, IPA_TRUE_VALUE,
                                      IPA_ACCESS_RULE_TYPE, IPA_HBAC_ALLOW,
                                      IPA_HOST_CATEGORY, "all",
                                      IPA_MEMBER_HOST, host_dn_clean);
    }
    if (rule_filter == NULL) {
        ret = ENOMEM;
        goto immediate;
    }

    /* Add all parent groups of ipa_hostname to the filter */
    ret = sysdb_attrs_get_string_array(ipa_host, SYSDB_ORIG_MEMBEROF,
                                       tmp_ctx, &memberof_list);
    if (ret != EOK && ret != ENOENT) {
        DEBUG(1, ("Could not identify "))
    } if (ret == ENOENT) {
        /* This host is not a member of any hostgroups */
        memberof_list = talloc_array(tmp_ctx, const char *, 1);
        if (memberof_list == NULL) {
            ret = ENOMEM;
            goto immediate;
        }
        memberof_list[0] = NULL;
    }

    for (i = 0; memberof_list[i]; i++) {
        ret = sss_filter_sanitize(tmp_ctx,
                                  memberof_list[i],
                                  &host_group_clean);
        if (ret != EOK) goto immediate;

        rule_filter = talloc_asprintf_append(rule_filter, "(%s=%s)",
                                             IPA_MEMBER_HOST,
                                             host_group_clean);
        if (rule_filter == NULL) {
            ret = ENOMEM;
            goto immediate;
        }
    }

    rule_filter = talloc_asprintf_append(rule_filter, "))");
    if (rule_filter == NULL) {
        ret = ENOMEM;
        goto immediate;
    }
    talloc_steal(state, rule_filter);

    subreq = sdap_get_generic_send(state, ev, opts, sh, search_base,
                                   LDAP_SCOPE_SUB, rule_filter, rule_attrs,
                                   NULL, 0,
                                   dp_opt_get_int(state->opts->basic,
                                                  SDAP_ENUM_SEARCH_TIMEOUT));
    if (subreq == NULL) {
        DEBUG(1, ("sdap_get_generic_send failed.\n"));
        ret = ENOMEM;
        goto immediate;
    }
    tevent_req_set_callback(subreq, ipa_hbac_rule_info_done, req);

    talloc_free(tmp_ctx);
    return req;

immediate:
    if (ret == EOK) {
        tevent_req_done(req);
    } else {
        tevent_req_error(req, ret);
    }
    tevent_req_post(req, ev);
    talloc_free(tmp_ctx);
    return req;

error:
    talloc_free(tmp_ctx);
    return NULL;
}

static void
ipa_hbac_rule_info_done(struct tevent_req *subreq)
{
    errno_t ret;
    struct tevent_req *req =
            tevent_req_callback_data(subreq, struct tevent_req);
    struct ipa_hbac_rule_state *state =
            tevent_req_data(req, struct ipa_hbac_rule_state);

    ret = sdap_get_generic_recv(subreq, state,
                                &state->rule_count,
                                &state->rules);
    if (ret != EOK) {
        DEBUG(3, ("Could not retrieve HBAC rules\n"));
        tevent_req_error(req, ret);
        return;
    } else if (state->rule_count == 0) {
        DEBUG(3, ("No rules apply to this host\n"));
        tevent_req_error(req, ENOENT);
        return;
    }

    tevent_req_done(req);
}

errno_t
ipa_hbac_rule_info_recv(struct tevent_req *req,
                        TALLOC_CTX *mem_ctx,
                        size_t *rule_count,
                        struct sysdb_attrs ***rules)
{
    struct ipa_hbac_rule_state *state =
            tevent_req_data(req, struct ipa_hbac_rule_state);

    TEVENT_REQ_RETURN_ON_ERROR(req);

    *rule_count = state->rule_count;
    *rules = talloc_steal(mem_ctx, state->rules);

    return EOK;
}