1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2 #include "integrity-util.h"
3
4 #include "extract-word.h"
5 #include "fileio.h"
6 #include "path-util.h"
7 #include "percent-util.h"
8
9
supported_integrity_algorithm(char * user_supplied)10 static int supported_integrity_algorithm(char *user_supplied) {
11 if (!STR_IN_SET(user_supplied, "crc32", "crc32c", "sha1", "sha256", "hmac-sha256"))
12 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unsupported integrity algorithm (%s)", user_supplied);
13 return 0;
14 }
15
parse_integrity_options(const char * options,uint32_t * ret_activate_flags,int * ret_percent,usec_t * ret_commit_time,char ** ret_data_device,char ** ret_integrity_alg)16 int parse_integrity_options(
17 const char *options,
18 uint32_t *ret_activate_flags,
19 int *ret_percent,
20 usec_t *ret_commit_time,
21 char **ret_data_device,
22 char **ret_integrity_alg) {
23 int r;
24
25 for (;;) {
26 _cleanup_free_ char *word = NULL;
27 char *val;
28
29 r = extract_first_word(&options, &word, ",", EXTRACT_DONT_COALESCE_SEPARATORS | EXTRACT_UNESCAPE_SEPARATORS);
30 if (r < 0)
31 return log_error_errno(r, "Failed to parse options: %m");
32 if (r == 0)
33 break;
34 else if (streq(word, "allow-discards")) {
35 if (ret_activate_flags)
36 *ret_activate_flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
37 } else if ((val = startswith(word, "journal-watermark="))) {
38 r = parse_percent(val);
39 if (r < 0)
40 return log_error_errno(r, "Failed to parse journal-watermark value or value out of range (%s)", val);
41 if (ret_percent)
42 *ret_percent = r;
43 } else if ((val = startswith(word, "journal-commit-time="))) {
44 usec_t tmp_commit_time;
45 r = parse_sec(val, &tmp_commit_time);
46 if (r < 0)
47 return log_error_errno(r, "Failed to parse journal-commit-time value (%s)", val);
48 if (ret_commit_time)
49 *ret_commit_time = tmp_commit_time;
50 } else if ((val = startswith(word, "data-device="))) {
51 if (ret_data_device) {
52 r = free_and_strdup(ret_data_device, val);
53 if (r < 0)
54 return log_oom();
55 }
56 } else if ((val = startswith(word, "integrity-algorithm="))) {
57 r = supported_integrity_algorithm(val);
58 if (r < 0)
59 return r;
60 if (ret_integrity_alg) {
61 r = free_and_strdup(ret_integrity_alg, val);
62 if (r < 0)
63 return log_oom();
64 }
65 } else
66 log_warning("Encountered unknown option '%s', ignoring.", word);
67 }
68
69 return r;
70 }
71