dccca82b1a
log.h really should only include the bare minimum of other headers, as it is really pulled into pretty much everything else and already in itself one of the most basic pieces of code we have. Let's hence drop inclusion of: 1. sd-id128.h because it's entirely unneeded in current log.h 2. errno.h, dito. 3. sys/signalfd.h which we can replace by a simple struct forward declaration 4. process-util.h which was needed for getpid_cached() which we now hide in a funciton log_emergency_level() instead, which nicely abstracts the details away. 5. sys/socket.h which was needed for struct iovec, but a simple struct forward declaration suffices for that too. Ultimately this actually makes our source tree larger (since users of the functionality above must now include it themselves, log.h won't do that for them), but I think it helps to untangle our web of includes a tiny bit. (Background: I'd like to isolate the generic bits of src/basic/ enough so that we can do a git submodule import into casync for it)
150 lines
4.6 KiB
C
150 lines
4.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2016 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include "alloc-util.h"
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#include "crypt-util.h"
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#include "hexdecoct.h"
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#include "log.h"
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#include "string-util.h"
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static char *arg_root_hash = NULL;
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static char *arg_data_what = NULL;
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static char *arg_hash_what = NULL;
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static int help(void) {
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printf("%s attach VOLUME DATADEVICE HASHDEVICE ROOTHASH\n"
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"%s detach VOLUME\n\n"
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"Attaches or detaches an integrity protected block device.\n",
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program_invocation_short_name,
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program_invocation_short_name);
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return 0;
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}
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int main(int argc, char *argv[]) {
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_cleanup_(crypt_freep) struct crypt_device *cd = NULL;
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int r;
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if (argc <= 1) {
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r = help();
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goto finish;
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}
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if (argc < 3) {
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log_error("This program requires at least two arguments.");
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r = -EINVAL;
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goto finish;
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}
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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if (streq(argv[1], "attach")) {
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_cleanup_free_ void *m = NULL;
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crypt_status_info status;
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size_t l;
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if (argc < 6) {
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log_error("attach requires at least two arguments.");
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r = -EINVAL;
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goto finish;
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}
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r = unhexmem(argv[5], strlen(argv[5]), &m, &l);
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if (r < 0) {
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log_error("Failed to parse root hash.");
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goto finish;
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}
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r = crypt_init(&cd, argv[4]);
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if (r < 0) {
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log_error_errno(r, "Failed to open verity device %s: %m", argv[4]);
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goto finish;
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}
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crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
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status = crypt_status(cd, argv[2]);
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if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
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log_info("Volume %s already active.", argv[2]);
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r = 0;
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goto finish;
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}
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r = crypt_load(cd, CRYPT_VERITY, NULL);
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if (r < 0) {
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log_error_errno(r, "Failed to load verity superblock: %m");
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goto finish;
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}
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r = crypt_set_data_device(cd, argv[3]);
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if (r < 0) {
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log_error_errno(r, "Failed to configure data device: %m");
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goto finish;
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}
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r = crypt_activate_by_volume_key(cd, argv[2], m, l, CRYPT_ACTIVATE_READONLY);
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if (r < 0) {
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log_error_errno(r, "Failed to set up verity device: %m");
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goto finish;
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}
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} else if (streq(argv[1], "detach")) {
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r = crypt_init_by_name(&cd, argv[2]);
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if (r == -ENODEV) {
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log_info("Volume %s already inactive.", argv[2]);
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goto finish;
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} else if (r < 0) {
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log_error_errno(r, "crypt_init_by_name() failed: %m");
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goto finish;
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}
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crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
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r = crypt_deactivate(cd, argv[2]);
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if (r < 0) {
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log_error_errno(r, "Failed to deactivate: %m");
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goto finish;
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}
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} else {
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log_error("Unknown verb %s.", argv[1]);
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r = -EINVAL;
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goto finish;
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}
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r = 0;
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finish:
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free(arg_root_hash);
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free(arg_data_what);
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free(arg_hash_what);
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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