X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Fveritysetup.c;h=3b1991d91ba476bbec27aa4a9a4bf96282336290;hb=c333108c61a549df91a2c8fcd6b12a80be68f879;hp=e6a08e4dce0ecc305316625493b167069ed80c73;hpb=c35839afbcaf7cda806045a04cff5b51275c3421;p=platform%2Fupstream%2Fcryptsetup.git diff --git a/src/veritysetup.c b/src/veritysetup.c index e6a08e4..3b1991d 100644 --- a/src/veritysetup.c +++ b/src/veritysetup.c @@ -17,57 +17,43 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -/* TODO: - * - init_by_name() - * - support device without superblock - * - audit alloc errors / error path - * - change command names (cryptsetup style) - * - extend superblock (UUID) - */ - #include #include #include #include #include +#include +#include #include +#include +#include #include "cryptsetup.h" #define PACKAGE_VERITY "veritysetup" -#define MODE_VERIFY 0 -#define MODE_CREATE 1 -#define MODE_ACTIVATE 2 -#define MODE_DUMP 3 - -static int mode = -1; -static int use_superblock = 1; /* FIXME: no superblock not supported */ +static int use_superblock = 1; -static const char *dm_device = NULL; -static const char *data_device = NULL; -static const char *hash_device = NULL; static const char *hash_algorithm = NULL; -static const char *root_hash = NULL; - -static int version = 1; +static int hash_type = 1; static int data_block_size = DEFAULT_VERITY_DATA_BLOCK; static int hash_block_size = DEFAULT_VERITY_HASH_BLOCK; -static char *data_blocks_string = NULL; static uint64_t data_blocks = 0; -static char *hash_start_string = NULL; static const char *salt_string = NULL; -static unsigned salt_size = DEFAULT_VERITY_SALT_SIZE; -static uint64_t hash_start = 0; +static uint64_t hash_offset = 0; +static const char *opt_uuid = NULL; static int opt_verbose = 0; static int opt_debug = 0; static int opt_version_mode = 0; -static int hex_to_bytes(const char *hex, char *result) +static const char **action_argv; +static int action_argc; + +static size_t hex_to_bytes(const char *hex, char *result) { char buf[3] = "xx\0", *endp; - int i, len; + size_t i, len; len = strlen(hex) / 2; for (i = 0; i < len; i++) { @@ -128,54 +114,88 @@ static void _log(int level, const char *msg, void *usrptr __attribute__((unused) } } -static int action_dump(void) +static int _prepare_format(struct crypt_params_verity *params, + const char *data_device, + uint32_t flags) +{ + static char salt_bytes[512]; + + params->hash_name = hash_algorithm ?: DEFAULT_VERITY_HASH; + params->data_device = data_device; + + if (salt_string && !strcmp(salt_string, "-")) { + params->salt_size = 0; + params->salt = NULL; + } else if (salt_string) { + if (hex_to_bytes(salt_string, salt_bytes) * 2 != strlen(salt_string)) { + log_err(_("Invalid salt string specified.\n")); + return -EINVAL; + } + params->salt_size = strlen(salt_string) / 2; + params->salt = salt_bytes; + } else + params->salt_size = DEFAULT_VERITY_SALT_SIZE; + + params->data_block_size = data_block_size; + params->hash_block_size = hash_block_size; + params->data_size = data_blocks; + params->hash_area_offset = hash_offset; + params->hash_type = hash_type; + params->flags = flags; + + return 0; +} + +static int action_format(int arg) { struct crypt_device *cd = NULL; struct crypt_params_verity params = {}; + uint32_t flags = CRYPT_VERITY_CREATE_HASH; int r; - if ((r = crypt_init(&cd, hash_device))) - return r; + if ((r = crypt_init(&cd, action_argv[1]))) + goto out; - params.hash_area_offset = hash_start; - r = crypt_load(cd, CRYPT_VERITY, ¶ms); + if (!use_superblock) + flags |= CRYPT_VERITY_NO_HEADER; + + r = _prepare_format(¶ms, action_argv[0], flags); + if (r < 0) + goto out; + + r = crypt_format(cd, CRYPT_VERITY, NULL, NULL, opt_uuid, NULL, 0, ¶ms); if (!r) crypt_dump(cd); +out: crypt_free(cd); return r; } -static int action_activate(int verify) +static int _activate(const char *dm_device, + const char *data_device, + const char *hash_device, + const char *root_hash, + uint32_t flags) { struct crypt_device *cd = NULL; struct crypt_params_verity params = {}; uint32_t activate_flags = CRYPT_ACTIVATE_READONLY; char root_hash_bytes[128]; + size_t hash_size; int r; if ((r = crypt_init(&cd, hash_device))) goto out; - if (verify) - params.flags |= CRYPT_VERITY_CHECK_HASH; - if (use_superblock) { - params.hash_area_offset = hash_start; - r = crypt_load(cd, CRYPT_VERITY, ¶ms); - } else {/* - params.hash_name = hash_algorithm; - params.salt = salt_bytes; - params.salt_size = salt_size; - params.data_block_size = data_block_size; - params.hash_block_size = hash_block_size; - - params.data_size = data_blocks * data_block_size / 512; - params.version = version; - params.flags |= CRYPT_VERITY_NO_HEADER; + params.flags = flags; + params.hash_area_offset = hash_offset; r = crypt_load(cd, CRYPT_VERITY, ¶ms); - crypt_format(); */ - r = -EINVAL; - goto out; + } else { + r = _prepare_format(¶ms, data_device, flags | CRYPT_VERITY_NO_HEADER); + if (r < 0) + goto out; + r = crypt_format(cd, CRYPT_VERITY, NULL, NULL, NULL, NULL, 0, ¶ms); } if (r < 0) goto out; @@ -183,56 +203,156 @@ static int action_activate(int verify) if (r < 0) goto out; - if (hex_to_bytes(root_hash, root_hash_bytes) != - crypt_get_volume_key_size(cd)) { + hash_size = crypt_get_volume_key_size(cd); + if (hash_size * 2 != strlen(root_hash) || + hex_to_bytes(root_hash, root_hash_bytes) != hash_size) { + log_err(_("Invalid root hash string specified.\n")); r = -EINVAL; goto out; } - r = crypt_activate_by_volume_key(cd, dm_device, root_hash_bytes, - crypt_get_volume_key_size(cd), + r = crypt_activate_by_volume_key(cd, dm_device, + root_hash_bytes, + hash_size, activate_flags); out: - if (!r) - crypt_dump(cd); crypt_free(cd); return r; } -static int action_create(void) +static int action_create(int arg) +{ + return _activate(action_argv[0], + action_argv[1], + action_argv[2], + action_argv[3], 0); +} + +static int action_verify(int arg) +{ + return _activate(NULL, + action_argv[0], + action_argv[1], + action_argv[2], + CRYPT_VERITY_CHECK_HASH); +} + +static int action_remove(int arg) { struct crypt_device *cd = NULL; - struct crypt_params_verity params = {}; - char salt_bytes[512]; int r; - if ((r = crypt_init(&cd, hash_device))) - goto out; + r = crypt_init_by_name(&cd, action_argv[0]); + if (r == 0) + r = crypt_deactivate(cd, action_argv[0]); + + crypt_free(cd); + return r; +} + +static int action_status(int arg) +{ + crypt_status_info ci; + struct crypt_active_device cad; + struct crypt_params_verity vp = {}; + struct crypt_device *cd = NULL; + struct stat st; + char *backing_file; + unsigned i, path = 0; + int r = 0; + + /* perhaps a path, not a dm device name */ + if (strchr(action_argv[0], '/') && !stat(action_argv[0], &st)) + path = 1; + + ci = crypt_status(NULL, action_argv[0]); + switch (ci) { + case CRYPT_INVALID: + r = -EINVAL; + break; + case CRYPT_INACTIVE: + if (path) + log_std("%s is inactive.\n", action_argv[0]); + else + log_std("%s/%s is inactive.\n", crypt_get_dir(), action_argv[0]); + r = -ENODEV; + break; + case CRYPT_ACTIVE: + case CRYPT_BUSY: + if (path) + log_std("%s is active%s.\n", action_argv[0], + ci == CRYPT_BUSY ? " and is in use" : ""); + else + log_std("%s/%s is active%s.\n", crypt_get_dir(), action_argv[0], + ci == CRYPT_BUSY ? " and is in use" : ""); + + r = crypt_init_by_name_and_header(&cd, action_argv[0], NULL); + if (r < 0 || !crypt_get_type(cd)) + goto out; + + log_std(" type: %s\n", crypt_get_type(cd)); - params.hash_name = hash_algorithm ?: DEFAULT_VERITY_HASH; - params.data_device = data_device; + r = crypt_get_active_device(cd, action_argv[0], &cad); + if (r < 0) + goto out; + + log_std(" status: %s\n", + cad.flags & CRYPT_ACTIVATE_CORRUPTED ? "corrupted" : "verified"); - if (salt_string) { - if (hex_to_bytes(salt_string, salt_bytes) != salt_size) { - r = -EINVAL; + r = crypt_get_verity_info(cd, &vp); + if (r < 0) goto out; + + log_std(" hash type: %u\n", vp.hash_type); + log_std(" data block: %u\n", vp.data_block_size); + log_std(" hash block: %u\n", vp.hash_block_size); + log_std(" hash name: %s\n", vp.hash_name); + log_std(" salt: "); + if (vp.salt_size) + for(i = 0; i < vp.salt_size; i++) + log_std("%02hhx", (const char)vp.salt[i]); + else + log_std("-"); + log_std("\n"); + + log_std(" data device: %s\n", vp.data_device); + if (crypt_loop_device(vp.data_device)) { + backing_file = crypt_loop_backing_file(vp.data_device); + log_std(" data loop: %s\n", backing_file); + free(backing_file); + } + log_std(" size: %" PRIu64 " sectors\n", cad.size); + log_std(" mode: %s\n", cad.flags & CRYPT_ACTIVATE_READONLY ? + "readonly" : "read/write"); + + log_std(" hash device: %s\n", vp.hash_device); + if (crypt_loop_device(vp.hash_device)) { + backing_file = crypt_loop_backing_file(vp.hash_device); + log_std(" hash loop: %s\n", backing_file); + free(backing_file); } - params.salt = salt_bytes; + log_std(" hash offset: %" PRIu64 " sectors\n", + vp.hash_area_offset * vp.hash_block_size / 512); } +out: + crypt_free(cd); + if (r == -ENOTSUP) + r = 0; + return r; +} - params.salt_size = salt_size; - params.data_block_size = data_block_size; - params.hash_block_size = hash_block_size; - params.data_size = data_blocks; - params.hash_area_offset = hash_start; - params.version = version; - params.flags = CRYPT_VERITY_CREATE_HASH; - if (!use_superblock) - params.flags |= CRYPT_VERITY_NO_HEADER; +static int action_dump(int arg) +{ + struct crypt_device *cd = NULL; + struct crypt_params_verity params = {}; + int r; + + if ((r = crypt_init(&cd, action_argv[0]))) + return r; - r = crypt_format(cd, CRYPT_VERITY, NULL, NULL, NULL, NULL, 0, ¶ms); + params.hash_area_offset = hash_offset; + r = crypt_load(cd, CRYPT_VERITY, ¶ms); if (!r) crypt_dump(cd); -out: crypt_free(cd); return r; } @@ -248,35 +368,128 @@ static __attribute__ ((noreturn)) void usage(poptContext popt_context, exit(exitcode); } +static void _dbg_version_and_cmd(int argc, const char **argv) +{ + int i; + + log_std("# %s %s processing \"", PACKAGE_VERITY, PACKAGE_VERSION); + for (i = 0; i < argc; i++) { + if (i) + log_std(" "); + log_std("%s", argv[i]); + } + log_std("\"\n"); +} + +static struct action_type { + const char *type; + int (*handler)(int); + int required_action_argc; + const char *arg_desc; + const char *desc; +} action_types[] = { + { "format", action_format, 2, N_(" "),N_("format device") }, + { "verify", action_verify, 3, N_(" "),N_("verify device") }, + { "create", action_create, 4, N_(" "),N_("create active device") }, + { "remove", action_remove, 1, N_(""),N_("remove (deactivate) device") }, + { "status", action_status, 1, N_(""),N_("show active device status") }, + { "dump", action_dump, 1, N_(""),N_("show on-disk information") }, + { NULL, NULL, 0, NULL, NULL } +}; + static void help(poptContext popt_context, enum poptCallbackReason reason __attribute__((unused)), struct poptOption *key, const char *arg __attribute__((unused)), void *data __attribute__((unused))) { + struct action_type *action; + if (key->shortName == '?') { log_std("%s %s\n", PACKAGE_VERITY, PACKAGE_VERSION); poptPrintHelp(popt_context, stdout, 0); + log_std(_("\n" + " is one of:\n")); + for(action = action_types; action->type; action++) + log_std("\t%s %s - %s\n", action->type, _(action->arg_desc), _(action->desc)); + log_std(_("\n" + " is the device to create under %s\n" + " is the data device\n" + " is the device containing verification data\n" + " hash of the root node on \n"), + crypt_get_dir()); + + log_std(_("\nDefault compiled-in dm-verity parameters:\n" + "\tHash: %s, Data block (bytes): %u, " + "Hash block (bytes): %u, Salt size: %u, Hash format: %u\n"), + DEFAULT_VERITY_HASH, DEFAULT_VERITY_DATA_BLOCK, + DEFAULT_VERITY_HASH_BLOCK, DEFAULT_VERITY_SALT_SIZE, + 1); exit(EXIT_SUCCESS); } else usage(popt_context, EXIT_SUCCESS, NULL, NULL); } -static void _dbg_version_and_cmd(int argc, const char **argv) +static void show_status(int errcode) { - int i; + char error[256], *error_; - log_std("# %s %s processing \"", PACKAGE_VERITY, PACKAGE_VERSION); - for (i = 0; i < argc; i++) { - if (i) - log_std(" "); - log_std("%s", argv[i]); + if(!opt_verbose) + return; + + if(!errcode) { + log_std(_("Command successful.\n")); + return; } - log_std("\"\n"); + + crypt_get_error(error, sizeof(error)); + + if (!error[0]) { + error_ = strerror_r(-errcode, error, sizeof(error)); + if (error_ != error) { + strncpy(error, error_, sizeof(error)); + error[sizeof(error) - 1] = '\0'; + } + } + + log_err(_("Command failed with code %i"), -errcode); + if (*error) + log_err(": %s\n", error); + else + log_err(".\n"); +} + +static int run_action(struct action_type *action) +{ + int r; + + log_dbg("Running command %s.", action->type); + + r = action->handler(0); + + show_status(r); + + /* Translate exit code to simple codes */ + switch (r) { + case 0: r = EXIT_SUCCESS; break; + case -EEXIST: + case -EBUSY: r = 5; break; + case -ENOTBLK: + case -ENODEV: r = 4; break; + case -ENOMEM: r = 3; break; + case -EPERM: r = 2; break; + case -EINVAL: + case -ENOENT: + case -ENOSYS: + default: r = EXIT_FAILURE; + } + return r; } int main(int argc, const char **argv) { + static char *popt_tmp; + static const char *null_action_argv[] = {NULL}; static struct poptOption popt_help_options[] = { { NULL, '\0', POPT_ARG_CALLBACK, help, 0, NULL, NULL }, { "help", '?', POPT_ARG_NONE, NULL, 0, N_("Show this help message"), NULL }, @@ -284,27 +497,26 @@ int main(int argc, const char **argv) POPT_TABLEEND }; static struct poptOption popt_options[] = { - { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL }, - { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL }, - { "verbose", 0 /*v*/, POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL }, - { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL }, - { "create", 'c', POPT_ARG_VAL, &mode, MODE_CREATE, "Create hash", NULL }, - { "verify", 'v', POPT_ARG_VAL, &mode, MODE_VERIFY, "Verify integrity", NULL }, - { "activate", 'a', POPT_ARG_VAL, &mode, MODE_ACTIVATE, "Activate the device", NULL }, - { "dump", 'd', POPT_ARG_VAL, &mode, MODE_DUMP, "Dump the device", NULL }, - { "no-superblock", 0, POPT_ARG_VAL, &use_superblock, 0, "Do not create/use superblock" }, - { "format", 0, POPT_ARG_INT, &version, 0, "Format version (1 - normal format, 0 - original Chromium OS format)", "number" }, - { "data-block-size", 0, POPT_ARG_INT, &data_block_size, 0, "Block size on the data device", "bytes" }, - { "hash-block-size", 0, POPT_ARG_INT, &hash_block_size, 0, "Block size on the hash device", "bytes" }, - { "data-blocks", 0, POPT_ARG_STRING, &data_blocks_string, 0, "The number of blocks in the data file", "blocks" }, - { "hash-start", 0, POPT_ARG_STRING, &hash_start_string, 0, "Starting block on the hash device", "512-byte sectors" }, - { "algorithm", 0, POPT_ARG_STRING, &hash_algorithm, 0, "Hash algorithm (default sha256)", "string" }, - { "salt", 0, POPT_ARG_STRING, &salt_string, 0, "Salt", "hex string" }, + { NULL, '\0', POPT_ARG_INCLUDE_TABLE, popt_help_options, 0, N_("Help options:"), NULL }, + { "version", '\0', POPT_ARG_NONE, &opt_version_mode, 0, N_("Print package version"), NULL }, + { "verbose", 'v', POPT_ARG_NONE, &opt_verbose, 0, N_("Shows more detailed error messages"), NULL }, + { "debug", '\0', POPT_ARG_NONE, &opt_debug, 0, N_("Show debug messages"), NULL }, + { "no-superblock", 0, POPT_ARG_VAL, &use_superblock, 0, N_("Do not use verity superblock"), NULL }, + { "format", 0, POPT_ARG_INT, &hash_type, 0, N_("Format type (1 - normal, 0 - original Chrome OS)"), N_("number") }, + { "data-block-size", 0, POPT_ARG_INT, &data_block_size, 0, N_("Block size on the data device"), N_("bytes") }, + { "hash-block-size", 0, POPT_ARG_INT, &hash_block_size, 0, N_("Block size on the hash device"), N_("bytes") }, + { "data-blocks", 0, POPT_ARG_STRING, &popt_tmp, 1, N_("The number of blocks in the data file"), N_("blocks") }, + { "hash-offset", 0, POPT_ARG_STRING, &popt_tmp, 2, N_("Starting offset on the hash device"), N_("bytes") }, + { "hash", 'h', POPT_ARG_STRING, &hash_algorithm, 0, N_("Hash algorithm"), N_("string") }, + { "salt", 's', POPT_ARG_STRING, &salt_string, 0, N_("Salt"), N_("hex string") }, + { "uuid", '\0', POPT_ARG_STRING, &opt_uuid, 0, N_("UUID for device to use."), NULL }, POPT_TABLEEND }; + poptContext popt_context; + struct action_type *action; + const char *aname; int r; - char *end; crypt_set_log_callback(NULL, _log, NULL); @@ -313,75 +525,74 @@ int main(int argc, const char **argv) textdomain(PACKAGE); popt_context = poptGetContext("verity", argc, argv, popt_options, 0); + poptSetOtherOptionHelp(popt_context, + N_("[OPTION...] ")); + + while((r = poptGetNextOpt(popt_context)) > 0) { + unsigned long long ull_value; + char *endp; + + errno = 0; + ull_value = strtoull(popt_tmp, &endp, 10); + if (*endp || !*popt_tmp || !isdigit(*popt_tmp) || + (errno == ERANGE && ull_value == ULLONG_MAX) || + (errno != 0 && ull_value == 0)) + r = POPT_ERROR_BADNUMBER; + + switch(r) { + case 1: + data_blocks = ull_value; + break; + case 2: + hash_offset = ull_value; + break; + } - poptSetOtherOptionHelp(popt_context, "[-c|-v|-a|-d] [ if activating] [ if activating or verifying] [OPTION...]"); - - if (argc <= 1) { - poptPrintHelp(popt_context, stdout, 0); - exit(1); + if (r < 0) + break; } - r = poptGetNextOpt(popt_context); if (r < -1) usage(popt_context, EXIT_FAILURE, poptStrerror(r), poptBadOption(popt_context, POPT_BADOPTION_NOALIAS)); + if (opt_version_mode) { log_std("%s %s\n", PACKAGE_VERITY, PACKAGE_VERSION); poptFreeContext(popt_context); exit(EXIT_SUCCESS); } - if (mode < 0) + if (!(aname = poptGetArg(popt_context))) + usage(popt_context, EXIT_FAILURE, _("Argument missing."), + poptGetInvocationName(popt_context)); + for(action = action_types; action->type; action++) + if (strcmp(action->type, aname) == 0) + break; + if (!action->type) usage(popt_context, EXIT_FAILURE, _("Unknown action."), poptGetInvocationName(popt_context)); - if (mode == MODE_ACTIVATE) { - dm_device = poptGetArg(popt_context); - if (!dm_device || !*dm_device) - usage(popt_context, EXIT_FAILURE, - _("Missing activation device name."), - poptGetInvocationName(popt_context)); - } - - data_device = poptGetArg(popt_context); - if (!data_device) - usage(popt_context, EXIT_FAILURE, _("Missing data device name."), - poptGetInvocationName(popt_context)); + action_argc = 0; + action_argv = poptGetArgs(popt_context); + /* Make return values of poptGetArgs more consistent in case of remaining argc = 0 */ + if(!action_argv) + action_argv = null_action_argv; - hash_device = poptGetArg(popt_context); - if (!hash_device) - usage(popt_context, EXIT_FAILURE, _("Missing hash device name."), - poptGetInvocationName(popt_context)); + /* Count args, somewhat unnice, change? */ + while(action_argv[action_argc] != NULL) + action_argc++; - if (mode == MODE_ACTIVATE || mode == MODE_VERIFY) { - root_hash = poptGetArg(popt_context); - if (!root_hash) - usage(popt_context, EXIT_FAILURE, _("Root hash not specified."), + if(action_argc < action->required_action_argc) { + char buf[128]; + snprintf(buf, 128,_("%s: requires %s as arguments"), action->type, action->arg_desc); + usage(popt_context, EXIT_FAILURE, buf, poptGetInvocationName(popt_context)); } - if (data_blocks_string) { - data_blocks = strtoll(data_blocks_string, &end, 10); - if (!*data_blocks_string || *end) - usage(popt_context, EXIT_FAILURE, - _("Invalid number of data blocks."), - poptGetInvocationName(popt_context)); - } - - /* hash start */ - if (hash_start_string) { - hash_start = strtoll(hash_start_string, &end, 10); - if (!*hash_start_string || *end) - usage(popt_context, EXIT_FAILURE, - _("Invalid hash device offset."), - poptGetInvocationName(popt_context)); - hash_start *= 512; - } - - if (salt_string || !use_superblock) { - if (!salt_string || !strcmp(salt_string, "-")) - salt_string = ""; - salt_size = strlen(salt_string) / 2; + if (data_block_size < 0 || hash_block_size < 0 || hash_type < 0) { + usage(popt_context, EXIT_FAILURE, + _("Negative number for option not permitted."), + poptGetInvocationName(popt_context)); } if (opt_debug) { @@ -390,21 +601,7 @@ int main(int argc, const char **argv) _dbg_version_and_cmd(argc, argv); } - switch (mode) { - case MODE_ACTIVATE: - r = action_activate(0); - break; - case MODE_VERIFY: - r = action_activate(1); - break; - case MODE_CREATE: - r = action_create(); - break; - case MODE_DUMP: - r = action_dump(); - break; - } - + r = run_action(action); poptFreeContext(popt_context); return r; }