From 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:49:52 +0200 Subject: Adding upstream version 255.4. Signed-off-by: Daniel Baumann --- src/cryptsetup/cryptsetup-keyfile.c | 62 +++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 src/cryptsetup/cryptsetup-keyfile.c (limited to 'src/cryptsetup/cryptsetup-keyfile.c') diff --git a/src/cryptsetup/cryptsetup-keyfile.c b/src/cryptsetup/cryptsetup-keyfile.c new file mode 100644 index 0000000..1867e90 --- /dev/null +++ b/src/cryptsetup/cryptsetup-keyfile.c @@ -0,0 +1,62 @@ +/* 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; +} -- cgit v1.2.3