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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "cryptsetup-keyfile.h"
#include "fileio.h"
#include "path-util.h"
#include "strv.h"
int find_key_file(
const char *key_file,
char **search_path,
const char *bindname,
void **ret_key,
size_t *ret_key_size) {
int r;
assert(key_file);
assert(ret_key);
assert(ret_key_size);
if (strv_isempty(search_path) || path_is_absolute(key_file)) {
r = read_full_file_full(
AT_FDCWD, key_file, UINT64_MAX, SIZE_MAX,
READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET,
bindname,
(char**) ret_key, ret_key_size);
if (r == -E2BIG)
return log_error_errno(r, "Key file '%s' too large.", key_file);
if (r < 0)
return log_error_errno(r, "Failed to load key file '%s': %m", key_file);
return 1;
}
STRV_FOREACH(i, search_path) {
_cleanup_free_ char *joined = NULL;
joined = path_join(*i, key_file);
if (!joined)
return log_oom();
r = read_full_file_full(
AT_FDCWD, joined, UINT64_MAX, SIZE_MAX,
READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET,
bindname,
(char**) ret_key, ret_key_size);
if (r >= 0)
return 1;
if (r == -E2BIG) {
log_warning_errno(r, "Key file '%s' too large, ignoring.", key_file);
continue;
}
if (r != -ENOENT)
return log_error_errno(r, "Failed to load key file '%s': %m", key_file);
}
/* Search path supplied, but file not found, report by returning NULL, but not failing */
*ret_key = NULL;
*ret_key_size = 0;
return 0;
}
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