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07d46372 YW |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2017 Yu Watanabe | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <errno.h> | |
21 | ||
22 | #include "alloc-util.h" | |
23 | #include "extract-word.h" | |
24 | #include "securebits.h" | |
25 | #include "securebits-util.h" | |
26 | #include "string-util.h" | |
27 | ||
28 | int secure_bits_to_string_alloc(int i, char **s) { | |
29 | _cleanup_free_ char *str = NULL; | |
30 | size_t len; | |
31 | int r; | |
32 | ||
33 | assert(s); | |
34 | ||
35 | r = asprintf(&str, "%s%s%s%s%s%s", | |
36 | (i & (1 << SECURE_KEEP_CAPS)) ? "keep-caps " : "", | |
37 | (i & (1 << SECURE_KEEP_CAPS_LOCKED)) ? "keep-caps-locked " : "", | |
38 | (i & (1 << SECURE_NO_SETUID_FIXUP)) ? "no-setuid-fixup " : "", | |
39 | (i & (1 << SECURE_NO_SETUID_FIXUP_LOCKED)) ? "no-setuid-fixup-locked " : "", | |
40 | (i & (1 << SECURE_NOROOT)) ? "noroot " : "", | |
41 | (i & (1 << SECURE_NOROOT_LOCKED)) ? "noroot-locked " : ""); | |
42 | if (r < 0) | |
43 | return -ENOMEM; | |
44 | ||
45 | len = strlen(str); | |
46 | if (len != 0) | |
47 | str[len - 1] = '\0'; | |
48 | ||
49 | *s = str; | |
50 | str = NULL; | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | int secure_bits_from_string(const char *s) { | |
56 | int secure_bits = 0; | |
57 | const char *p; | |
58 | int r; | |
59 | ||
60 | for (p = s;;) { | |
61 | _cleanup_free_ char *word = NULL; | |
62 | ||
63 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES); | |
64 | if (r == -ENOMEM) | |
65 | return r; | |
66 | if (r <= 0) | |
67 | break; | |
68 | ||
69 | if (streq(word, "keep-caps")) | |
70 | secure_bits |= 1 << SECURE_KEEP_CAPS; | |
71 | else if (streq(word, "keep-caps-locked")) | |
72 | secure_bits |= 1 << SECURE_KEEP_CAPS_LOCKED; | |
73 | else if (streq(word, "no-setuid-fixup")) | |
74 | secure_bits |= 1 << SECURE_NO_SETUID_FIXUP; | |
75 | else if (streq(word, "no-setuid-fixup-locked")) | |
76 | secure_bits |= 1 << SECURE_NO_SETUID_FIXUP_LOCKED; | |
77 | else if (streq(word, "noroot")) | |
78 | secure_bits |= 1 << SECURE_NOROOT; | |
79 | else if (streq(word, "noroot-locked")) | |
80 | secure_bits |= 1 << SECURE_NOROOT_LOCKED; | |
81 | } | |
82 | ||
83 | return secure_bits; | |
84 | } |