140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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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 "cryptsetup-util.h"
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#include "fileio.h"
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#include "hexdecoct.h"
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#include "log.h"
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#include "main-func.h"
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#include "path-util.h"
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#include "pretty-print.h"
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#include "string-util.h"
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#include "terminal-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_DESTRUCTOR_REGISTER(arg_root_hash, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_data_what, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_hash_what, freep);
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static int help(void) {
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_cleanup_free_ char *link = NULL;
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int r;
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r = terminal_urlify_man("systemd-veritysetup@.service", "8", &link);
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if (r < 0)
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return log_oom();
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printf("%s attach VOLUME DATADEVICE HASHDEVICE ROOTHASH [ROOTHASHSIG]\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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"\nSee the %s for details.\n"
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, program_invocation_short_name
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, program_invocation_short_name
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, link
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);
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return 0;
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}
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static int run(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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return help();
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if (argc < 3)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program requires at least two arguments.");
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log_setup_service();
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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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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach requires at least two arguments.");
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r = unhexmem(argv[5], strlen(argv[5]), &m, &l);
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if (r < 0)
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return log_error_errno(r, "Failed to parse root hash: %m");
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r = crypt_init(&cd, argv[4]);
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if (r < 0)
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return log_error_errno(r, "Failed to open verity device %s: %m", argv[4]);
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cryptsetup_enable_logging(cd);
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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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return 0;
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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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return log_error_errno(r, "Failed to load verity superblock: %m");
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r = crypt_set_data_device(cd, argv[3]);
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if (r < 0)
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return log_error_errno(r, "Failed to configure data device: %m");
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if (argc > 6) {
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#if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY
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_cleanup_free_ char *hash_sig = NULL;
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size_t hash_sig_size;
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char *value;
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if ((value = startswith(argv[6], "base64:"))) {
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r = unbase64mem(value, strlen(value), (void *)&hash_sig, &hash_sig_size);
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if (r < 0)
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return log_error_errno(r, "Failed to parse root hash signature '%s': %m", argv[6]);
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} else {
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r = read_full_file_full(AT_FDCWD, argv[6], READ_FULL_FILE_CONNECT_SOCKET, &hash_sig, &hash_sig_size);
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if (r < 0)
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return log_error_errno(r, "Failed to read root hash signature: %m");
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}
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r = crypt_activate_by_signed_key(cd, argv[2], m, l, hash_sig, hash_sig_size, CRYPT_ACTIVATE_READONLY);
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#else
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return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "activation of verity device with signature %s requested, but not supported by cryptsetup due to missing crypt_activate_by_signed_key()", argv[6]);
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#endif
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} else
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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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return log_error_errno(r, "Failed to set up verity device: %m");
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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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return 0;
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}
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if (r < 0)
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return log_error_errno(r, "crypt_init_by_name() failed: %m");
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cryptsetup_enable_logging(cd);
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r = crypt_deactivate(cd, argv[2]);
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if (r < 0)
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return log_error_errno(r, "Failed to deactivate: %m");
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} else
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb %s.", argv[1]);
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return 0;
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}
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DEFINE_MAIN_FUNCTION(run);
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