diff options
Diffstat (limited to 'src/veritysetup/veritysetup.c')
| -rw-r--r-- | src/veritysetup/veritysetup.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/veritysetup/veritysetup.c b/src/veritysetup/veritysetup.c new file mode 100644 index 0000000000..f809d51638 --- /dev/null +++ b/src/veritysetup/veritysetup.c @@ -0,0 +1,154 @@ +/*** + This file is part of systemd. + + Copyright 2016 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <libcryptsetup.h> +#include <stdio.h> +#include <sys/stat.h> + +#include "log.h" +#include "hexdecoct.h" +#include "string-util.h" +#include "alloc-util.h" + +static char *arg_root_hash = NULL; +static char *arg_data_what = NULL; +static char *arg_hash_what = NULL; + +static int help(void) { + printf("%s attach VOLUME DATADEVICE HASHDEVICE ROOTHASH\n" + "%s detach VOLUME\n\n" + "Attaches or detaches an integrity protected block device.\n", + program_invocation_short_name, + program_invocation_short_name); + + return 0; +} + +static void log_glue(int level, const char *msg, void *usrptr) { + log_debug("%s", msg); +} + +int main(int argc, char *argv[]) { + struct crypt_device *cd = NULL; + int r; + + if (argc <= 1) { + r = help(); + goto finish; + } + + if (argc < 3) { + log_error("This program requires at least two arguments."); + r = -EINVAL; + goto finish; + } + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + umask(0022); + + if (streq(argv[1], "attach")) { + _cleanup_free_ void *m = NULL; + crypt_status_info status; + size_t l; + + if (argc < 6) { + log_error("attach requires at least two arguments."); + r = -EINVAL; + goto finish; + } + + r = unhexmem(argv[5], strlen(argv[5]), &m, &l); + if (r < 0) { + log_error("Failed to parse root hash."); + goto finish; + } + + r = crypt_init(&cd, argv[4]); + if (r < 0) { + log_error_errno(r, "Failed to open verity device %s: %m", argv[4]); + goto finish; + } + + crypt_set_log_callback(cd, log_glue, NULL); + + status = crypt_status(cd, argv[2]); + if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) { + log_info("Volume %s already active.", argv[2]); + r = 0; + goto finish; + } + + r = crypt_load(cd, CRYPT_VERITY, NULL); + if (r < 0) { + log_error_errno(r, "Failed to load verity superblock: %m"); + goto finish; + } + + r = crypt_set_data_device(cd, argv[3]); + if (r < 0) { + log_error_errno(r, "Failed to configure data device: %m"); + goto finish; + } + + r = crypt_activate_by_volume_key(cd, argv[2], m, l, CRYPT_ACTIVATE_READONLY); + if (r < 0) { + log_error_errno(r, "Failed to set up verity device: %m"); + goto finish; + } + + } else if (streq(argv[1], "detach")) { + + r = crypt_init_by_name(&cd, argv[2]); + if (r == -ENODEV) { + log_info("Volume %s already inactive.", argv[2]); + goto finish; + } else if (r < 0) { + log_error_errno(r, "crypt_init_by_name() failed: %m"); + goto finish; + } + + crypt_set_log_callback(cd, log_glue, NULL); + + r = crypt_deactivate(cd, argv[2]); + if (r < 0) { + log_error_errno(r, "Failed to deactivate: %m"); + goto finish; + } + + } else { + log_error("Unknown verb %s.", argv[1]); + r = -EINVAL; + goto finish; + } + + r = 0; + +finish: + if (cd) + crypt_free(cd); + + free(arg_root_hash); + free(arg_data_what); + free(arg_hash_what); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |