Line data Source code
1 : /*
2 : SSSD
3 :
4 : Utility functions related to ID information
5 :
6 : Copyright (C) Jan Zeleny <jzeleny@redhat.com> 2012
7 :
8 : This program is free software; you can redistribute it and/or modify
9 : it under the terms of the GNU General Public License as published by
10 : the Free Software Foundation; either version 3 of the License, or
11 : (at your option) any later version.
12 :
13 : This program is distributed in the hope that it will be useful,
14 : but WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 : GNU General Public License for more details.
17 :
18 : You should have received a copy of the GNU General Public License
19 : along with this program. If not, see <http://www.gnu.org/licenses/>.
20 : */
21 :
22 : #include "util/util.h"
23 : #include "util/sss_nss.h"
24 :
25 60 : char *expand_homedir_template(TALLOC_CTX *mem_ctx, const char *template,
26 : struct sss_nss_homedir_ctx *homedir_ctx)
27 : {
28 : char *copy;
29 : char *p;
30 : char *n;
31 60 : char *result = NULL;
32 60 : char *res = NULL;
33 60 : TALLOC_CTX *tmp_ctx = NULL;
34 60 : const char *orig = NULL;
35 :
36 60 : if (template == NULL) {
37 1 : DEBUG(SSSDBG_CRIT_FAILURE, "Missing template.\n");
38 1 : return NULL;
39 : }
40 :
41 59 : if (homedir_ctx == NULL) {
42 1 : DEBUG(SSSDBG_CRIT_FAILURE, "Missing home directory data.\n");
43 1 : return NULL;
44 : }
45 :
46 58 : tmp_ctx = talloc_new(NULL);
47 58 : if (!tmp_ctx) return NULL;
48 :
49 58 : copy = talloc_strdup(tmp_ctx, template);
50 58 : if (copy == NULL) {
51 0 : DEBUG(SSSDBG_CRIT_FAILURE, "talloc_strdup failed.\n");
52 0 : goto done;
53 : }
54 :
55 58 : result = talloc_strdup(tmp_ctx, "");
56 58 : if (result == NULL) {
57 0 : DEBUG(SSSDBG_CRIT_FAILURE, "talloc_strdup failed.\n");
58 0 : goto done;
59 : }
60 :
61 58 : p = copy;
62 158 : while ( (n = strchr(p, '%')) != NULL) {
63 52 : *n = '\0';
64 52 : n++;
65 52 : if ( *n == '\0' ) {
66 1 : DEBUG(SSSDBG_CRIT_FAILURE, "format error, single %% at the end of "
67 : "the template.\n");
68 1 : goto done;
69 : }
70 51 : switch( *n ) {
71 : case 'u':
72 6 : if (homedir_ctx->username == NULL) {
73 1 : DEBUG(SSSDBG_CRIT_FAILURE,
74 : "Cannot expand user name template because user name "
75 : "is empty.\n");
76 1 : goto done;
77 : }
78 5 : result = talloc_asprintf_append(result, "%s%s", p,
79 : homedir_ctx->username);
80 5 : break;
81 :
82 : case 'U':
83 6 : if (homedir_ctx->uid == 0) {
84 1 : DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand uid template "
85 : "because uid is invalid.\n");
86 1 : goto done;
87 : }
88 5 : result = talloc_asprintf_append(result, "%s%d", p,
89 : homedir_ctx->uid);
90 5 : break;
91 :
92 : case 'd':
93 6 : if (homedir_ctx->domain == NULL) {
94 1 : DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand domain name "
95 : "template because domain name "
96 : "is empty.\n");
97 1 : goto done;
98 : }
99 5 : result = talloc_asprintf_append(result, "%s%s", p,
100 : homedir_ctx->domain);
101 5 : break;
102 :
103 : case 'f':
104 8 : if (homedir_ctx->domain == NULL
105 6 : || homedir_ctx->username == NULL) {
106 3 : DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand fully qualified "
107 : "name template because domain "
108 : "or user name is empty.\n");
109 3 : goto done;
110 : }
111 5 : result = talloc_asprintf_append(result, "%s%s@%s", p,
112 : homedir_ctx->username,
113 : homedir_ctx->domain);
114 5 : break;
115 :
116 : case 'o':
117 6 : if (homedir_ctx->original == NULL) {
118 1 : DEBUG(SSSDBG_CRIT_FAILURE,
119 : "Original home directory for %s is not available, "
120 : "using empty string\n", homedir_ctx->username);
121 1 : orig = "";
122 : } else {
123 5 : orig = homedir_ctx->original;
124 : }
125 6 : result = talloc_asprintf_append(result, "%s%s", p, orig);
126 6 : break;
127 :
128 : case 'F':
129 6 : if (homedir_ctx->flatname == NULL) {
130 1 : DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand domain name "
131 : "template because domain flat "
132 : "name is empty.\n");
133 1 : goto done;
134 : }
135 5 : result = talloc_asprintf_append(result, "%s%s", p,
136 : homedir_ctx->flatname);
137 5 : break;
138 :
139 : case 'H':
140 6 : if (homedir_ctx->config_homedir_substr == NULL) {
141 1 : DEBUG(SSSDBG_CRIT_FAILURE,
142 : "Cannot expand home directory substring template "
143 : "substring is empty.\n");
144 1 : goto done;
145 : }
146 5 : result = talloc_asprintf_append(result, "%s%s", p,
147 : homedir_ctx->config_homedir_substr);
148 5 : break;
149 :
150 : case 'P':
151 0 : if (homedir_ctx->upn == NULL) {
152 0 : DEBUG(SSSDBG_CRIT_FAILURE,
153 : "Cannot expand user principal name template "
154 : "string is empty.\n");
155 0 : goto done;
156 : }
157 0 : result = talloc_asprintf_append(result, "%s%s", p,
158 : homedir_ctx->upn);
159 0 : break;
160 :
161 : case '%':
162 6 : result = talloc_asprintf_append(result, "%s%%", p);
163 6 : break;
164 :
165 : default:
166 1 : DEBUG(SSSDBG_CRIT_FAILURE, "format error, unknown template "
167 : "[%%%c].\n", *n);
168 1 : goto done;
169 : }
170 :
171 42 : if (result == NULL) {
172 0 : DEBUG(SSSDBG_CRIT_FAILURE, "talloc_asprintf_append failed.\n");
173 0 : goto done;
174 : }
175 :
176 42 : p = n + 1;
177 : }
178 :
179 48 : result = talloc_asprintf_append(result, "%s", p);
180 48 : if (result == NULL) {
181 0 : DEBUG(SSSDBG_CRIT_FAILURE, "talloc_asprintf_append failed.\n");
182 0 : goto done;
183 : }
184 :
185 48 : res = talloc_move(mem_ctx, &result);
186 : done:
187 58 : talloc_zfree(tmp_ctx);
188 58 : return res;
189 : }
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