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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "integrity-util.h"
#include "extract-word.h"
#include "fileio.h"
#include "path-util.h"
#include "percent-util.h"
static int supported_integrity_algorithm(char *user_supplied) {
if (!STR_IN_SET(user_supplied, "crc32", "crc32c", "sha1", "sha256", "hmac-sha256"))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unsupported integrity algorithm (%s)", user_supplied);
return 0;
}
int 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) {
int r;
for (;;) {
_cleanup_free_ char *word = NULL;
char *val;
r = extract_first_word(&options, &word, ",", EXTRACT_DONT_COALESCE_SEPARATORS | EXTRACT_UNESCAPE_SEPARATORS);
if (r < 0)
return log_error_errno(r, "Failed to parse options: %m");
if (r == 0)
break;
else if (streq(word, "allow-discards")) {
if (ret_activate_flags)
*ret_activate_flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
} else if ((val = startswith(word, "mode="))) {
if (streq(val, "journal")) {
if (ret_activate_flags)
*ret_activate_flags &= ~(CRYPT_ACTIVATE_NO_JOURNAL | CRYPT_ACTIVATE_NO_JOURNAL_BITMAP);
} else if (streq(val, "bitmap")) {
if (ret_activate_flags) {
*ret_activate_flags &= ~CRYPT_ACTIVATE_NO_JOURNAL;
*ret_activate_flags |= CRYPT_ACTIVATE_NO_JOURNAL_BITMAP;
}
} else if (streq(val, "direct")) {
if (ret_activate_flags) {
*ret_activate_flags |= CRYPT_ACTIVATE_NO_JOURNAL;
*ret_activate_flags &= ~CRYPT_ACTIVATE_NO_JOURNAL_BITMAP;
}
} else
log_warning("Encountered unknown mode option '%s', ignoring.", val);
} else if ((val = startswith(word, "journal-watermark="))) {
r = parse_percent(val);
if (r < 0)
return log_error_errno(r, "Failed to parse journal-watermark value or value out of range (%s)", val);
if (ret_percent)
*ret_percent = r;
} else if ((val = startswith(word, "journal-commit-time="))) {
usec_t tmp_commit_time;
r = parse_sec(val, &tmp_commit_time);
if (r < 0)
return log_error_errno(r, "Failed to parse journal-commit-time value (%s)", val);
if (ret_commit_time)
*ret_commit_time = tmp_commit_time;
} else if ((val = startswith(word, "data-device="))) {
if (ret_data_device) {
r = free_and_strdup(ret_data_device, val);
if (r < 0)
return log_oom();
}
} else if ((val = startswith(word, "integrity-algorithm="))) {
r = supported_integrity_algorithm(val);
if (r < 0)
return r;
if (ret_integrity_alg) {
r = free_and_strdup(ret_integrity_alg, val);
if (r < 0)
return log_oom();
}
} else
log_warning("Encountered unknown option '%s', ignoring.", word);
}
return r;
}
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