diff options
Diffstat (limited to 'src/cryptsetup')
| l--------- | src/cryptsetup/Makefile | 1 | ||||
| -rw-r--r-- | src/cryptsetup/cryptsetup-generator.c | 506 | ||||
| -rw-r--r-- | src/cryptsetup/cryptsetup.c | 771 |
3 files changed, 0 insertions, 1278 deletions
diff --git a/src/cryptsetup/Makefile b/src/cryptsetup/Makefile deleted file mode 120000 index d0b0e8e008..0000000000 --- a/src/cryptsetup/Makefile +++ /dev/null @@ -1 +0,0 @@ -../Makefile
\ No newline at end of file diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c deleted file mode 100644 index e2dc4327fe..0000000000 --- a/src/cryptsetup/cryptsetup-generator.c +++ /dev/null @@ -1,506 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2010 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 <errno.h> - -#include "alloc-util.h" -#include "dropin.h" -#include "fd-util.h" -#include "fileio.h" -#include "fstab-util.h" -#include "generator.h" -#include "hashmap.h" -#include "log.h" -#include "mkdir.h" -#include "parse-util.h" -#include "path-util.h" -#include "proc-cmdline.h" -#include "string-util.h" -#include "strv.h" -#include "unit-name.h" -#include "util.h" - -typedef struct crypto_device { - char *uuid; - char *keyfile; - char *name; - char *options; - bool create; -} crypto_device; - -static const char *arg_dest = "/tmp"; -static bool arg_enabled = true; -static bool arg_read_crypttab = true; -static bool arg_whitelist = false; -static Hashmap *arg_disks = NULL; -static char *arg_default_options = NULL; -static char *arg_default_keyfile = NULL; - -static int create_disk( - const char *name, - const char *device, - const char *password, - const char *options) { - - _cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *to = NULL, *e = NULL, - *filtered = NULL; - _cleanup_fclose_ FILE *f = NULL; - bool noauto, nofail, tmp, swap; - char *from; - int r; - - assert(name); - assert(device); - - noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0"); - nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0"); - tmp = fstab_test_option(options, "tmp\0"); - swap = fstab_test_option(options, "swap\0"); - - if (tmp && swap) { - log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name); - return -EINVAL; - } - - e = unit_name_escape(name); - if (!e) - return log_oom(); - - r = unit_name_build("systemd-cryptsetup", e, ".service", &n); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - p = strjoin(arg_dest, "/", n, NULL); - if (!p) - return log_oom(); - - u = fstab_node_to_udev_node(device); - if (!u) - return log_oom(); - - r = unit_name_from_path(u, ".device", &d); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - f = fopen(p, "wxe"); - if (!f) - return log_error_errno(errno, "Failed to create unit file %s: %m", p); - - fputs( - "# Automatically generated by systemd-cryptsetup-generator\n\n" - "[Unit]\n" - "Description=Cryptography Setup for %I\n" - "Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:systemd-cryptsetup@.service(8)\n" - "SourcePath=/etc/crypttab\n" - "DefaultDependencies=no\n" - "Conflicts=umount.target\n" - "BindsTo=dev-mapper-%i.device\n" - "IgnoreOnIsolate=true\n" - "After=cryptsetup-pre.target\n", - f); - - if (!nofail) - fprintf(f, - "Before=cryptsetup.target\n"); - - if (password) { - if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random")) - fputs("After=systemd-random-seed.service\n", f); - else if (!streq(password, "-") && !streq(password, "none")) { - _cleanup_free_ char *uu; - - uu = fstab_node_to_udev_node(password); - if (!uu) - return log_oom(); - - if (!path_equal(uu, "/dev/null")) { - - if (is_device_path(uu)) { - _cleanup_free_ char *dd = NULL; - - r = unit_name_from_path(uu, ".device", &dd); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - fprintf(f, "After=%1$s\nRequires=%1$s\n", dd); - } else - fprintf(f, "RequiresMountsFor=%s\n", password); - } - } - } - - if (is_device_path(u)) - fprintf(f, - "BindsTo=%s\n" - "After=%s\n" - "Before=umount.target\n", - d, d); - else - fprintf(f, - "RequiresMountsFor=%s\n", - u); - - r = generator_write_timeouts(arg_dest, device, name, options, &filtered); - if (r < 0) - return r; - - fprintf(f, - "\n[Service]\n" - "Type=oneshot\n" - "RemainAfterExit=yes\n" - "TimeoutSec=0\n" /* the binary handles timeouts anyway */ - "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n" - "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n", - name, u, strempty(password), strempty(filtered), - name); - - if (tmp) - fprintf(f, - "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n", - name); - - if (swap) - fprintf(f, - "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n", - name); - - r = fflush_and_check(f); - if (r < 0) - return log_error_errno(r, "Failed to write file %s: %m", p); - - from = strjoina("../", n); - - if (!noauto) { - - to = strjoin(arg_dest, "/", d, ".wants/", n, NULL); - if (!to) - return log_oom(); - - mkdir_parents_label(to, 0755); - if (symlink(from, to) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", to); - - free(to); - if (!nofail) - to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL); - else - to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL); - if (!to) - return log_oom(); - - mkdir_parents_label(to, 0755); - if (symlink(from, to) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", to); - } - - free(to); - to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL); - if (!to) - return log_oom(); - - mkdir_parents_label(to, 0755); - if (symlink(from, to) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", to); - - if (!noauto && !nofail) { - _cleanup_free_ char *dmname; - dmname = strjoin("dev-mapper-", e, ".device", NULL); - if (!dmname) - return log_oom(); - - r = write_drop_in(arg_dest, dmname, 90, "device-timeout", - "# Automatically generated by systemd-cryptsetup-generator \n\n" - "[Unit]\nJobTimeoutSec=0"); - if (r < 0) - return log_error_errno(r, "Failed to write device drop-in: %m"); - } - - return 0; -} - -static void free_arg_disks(void) { - crypto_device *d; - - while ((d = hashmap_steal_first(arg_disks))) { - free(d->uuid); - free(d->keyfile); - free(d->name); - free(d->options); - free(d); - } - - hashmap_free(arg_disks); -} - -static crypto_device *get_crypto_device(const char *uuid) { - int r; - crypto_device *d; - - assert(uuid); - - d = hashmap_get(arg_disks, uuid); - if (!d) { - d = new0(struct crypto_device, 1); - if (!d) - return NULL; - - d->create = false; - d->keyfile = d->options = d->name = NULL; - - d->uuid = strdup(uuid); - if (!d->uuid) - return mfree(d); - - r = hashmap_put(arg_disks, d->uuid, d); - if (r < 0) { - free(d->uuid); - return mfree(d); - } - } - - return d; -} - -static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { - int r; - crypto_device *d; - _cleanup_free_ char *uuid = NULL, *uuid_value = NULL; - - if (streq(key, "luks") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse luks switch %s. Ignoring.", value); - else - arg_enabled = r; - - } else if (streq(key, "luks.crypttab") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse luks crypttab switch %s. Ignoring.", value); - else - arg_read_crypttab = r; - - } else if (streq(key, "luks.uuid") && value) { - - d = get_crypto_device(startswith(value, "luks-") ? value+5 : value); - if (!d) - return log_oom(); - - d->create = arg_whitelist = true; - - } else if (streq(key, "luks.options") && value) { - - r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); - if (r == 2) { - d = get_crypto_device(uuid); - if (!d) - return log_oom(); - - free(d->options); - d->options = uuid_value; - uuid_value = NULL; - } else if (free_and_strdup(&arg_default_options, value) < 0) - return log_oom(); - - } else if (streq(key, "luks.key") && value) { - - r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); - if (r == 2) { - d = get_crypto_device(uuid); - if (!d) - return log_oom(); - - free(d->keyfile); - d->keyfile = uuid_value; - uuid_value = NULL; - } else if (free_and_strdup(&arg_default_keyfile, value) < 0) - return log_oom(); - - } else if (streq(key, "luks.name") && value) { - - r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); - if (r == 2) { - d = get_crypto_device(uuid); - if (!d) - return log_oom(); - - d->create = arg_whitelist = true; - - free(d->name); - d->name = uuid_value; - uuid_value = NULL; - } else - log_warning("Failed to parse luks name switch %s. Ignoring.", value); - - } - - return 0; -} - -static int add_crypttab_devices(void) { - struct stat st; - unsigned crypttab_line = 0; - _cleanup_fclose_ FILE *f = NULL; - - if (!arg_read_crypttab) - return 0; - - f = fopen("/etc/crypttab", "re"); - if (!f) { - if (errno != ENOENT) - log_error_errno(errno, "Failed to open /etc/crypttab: %m"); - return 0; - } - - if (fstat(fileno(f), &st) < 0) { - log_error_errno(errno, "Failed to stat /etc/crypttab: %m"); - return 0; - } - - for (;;) { - int r, k; - char line[LINE_MAX], *l, *uuid; - crypto_device *d = NULL; - _cleanup_free_ char *name = NULL, *device = NULL, *keyfile = NULL, *options = NULL; - - if (!fgets(line, sizeof(line), f)) - break; - - crypttab_line++; - - l = strstrip(line); - if (*l == '#' || *l == 0) - continue; - - k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyfile, &options); - if (k < 2 || k > 4) { - log_error("Failed to parse /etc/crypttab:%u, ignoring.", crypttab_line); - continue; - } - - uuid = startswith(device, "UUID="); - if (!uuid) - uuid = path_startswith(device, "/dev/disk/by-uuid/"); - if (!uuid) - uuid = startswith(name, "luks-"); - if (uuid) - d = hashmap_get(arg_disks, uuid); - - if (arg_whitelist && !d) { - log_info("Not creating device '%s' because it was not specified on the kernel command line.", name); - continue; - } - - r = create_disk(name, device, keyfile, (d && d->options) ? d->options : options); - if (r < 0) - return r; - - if (d) - d->create = false; - } - - return 0; -} - -static int add_proc_cmdline_devices(void) { - int r; - Iterator i; - crypto_device *d; - - HASHMAP_FOREACH(d, arg_disks, i) { - const char *options; - _cleanup_free_ char *device = NULL; - - if (!d->create) - continue; - - if (!d->name) { - d->name = strappend("luks-", d->uuid); - if (!d->name) - return log_oom(); - } - - device = strappend("UUID=", d->uuid); - if (!device) - return log_oom(); - - if (d->options) - options = d->options; - else if (arg_default_options) - options = arg_default_options; - else - options = "timeout=0"; - - r = create_disk(d->name, device, d->keyfile ?: arg_default_keyfile, options); - if (r < 0) - return r; - } - - return 0; -} - -int main(int argc, char *argv[]) { - int r = EXIT_FAILURE; - - if (argc > 1 && argc != 4) { - log_error("This program takes three or no arguments."); - return EXIT_FAILURE; - } - - if (argc > 1) - arg_dest = argv[1]; - - log_set_target(LOG_TARGET_SAFE); - log_parse_environment(); - log_open(); - - umask(0022); - - arg_disks = hashmap_new(&string_hash_ops); - if (!arg_disks) - goto cleanup; - - r = parse_proc_cmdline(parse_proc_cmdline_item, NULL, true); - if (r < 0) { - log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); - r = EXIT_FAILURE; - } - - if (!arg_enabled) { - r = EXIT_SUCCESS; - goto cleanup; - } - - if (add_crypttab_devices() < 0) - goto cleanup; - - if (add_proc_cmdline_devices() < 0) - goto cleanup; - - r = EXIT_SUCCESS; - -cleanup: - free_arg_disks(); - free(arg_default_options); - free(arg_default_keyfile); - - return r; -} diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c deleted file mode 100644 index ff5a3f36fb..0000000000 --- a/src/cryptsetup/cryptsetup.c +++ /dev/null @@ -1,771 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2010 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 <errno.h> -#include <libcryptsetup.h> -#include <mntent.h> -#include <string.h> -#include <sys/mman.h> - -#include "sd-device.h" - -#include "alloc-util.h" -#include "ask-password-api.h" -#include "device-util.h" -#include "escape.h" -#include "fileio.h" -#include "log.h" -#include "mount-util.h" -#include "parse-util.h" -#include "path-util.h" -#include "string-util.h" -#include "strv.h" -#include "util.h" - -static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ -static char *arg_cipher = NULL; -static unsigned arg_key_size = 0; -static int arg_key_slot = CRYPT_ANY_SLOT; -static unsigned arg_keyfile_size = 0; -static unsigned arg_keyfile_offset = 0; -static char *arg_hash = NULL; -static char *arg_header = NULL; -static unsigned arg_tries = 3; -static bool arg_readonly = false; -static bool arg_verify = false; -static bool arg_discards = false; -static bool arg_tcrypt_hidden = false; -static bool arg_tcrypt_system = false; -static bool arg_tcrypt_veracrypt = false; -static char **arg_tcrypt_keyfiles = NULL; -static uint64_t arg_offset = 0; -static uint64_t arg_skip = 0; -static usec_t arg_timeout = 0; - -/* Options Debian's crypttab knows we don't: - - precheck= - check= - checkargs= - noearly= - loud= - keyscript= -*/ - -static int parse_one_option(const char *option) { - assert(option); - - /* Handled outside of this tool */ - if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail")) - return 0; - - if (startswith(option, "cipher=")) { - char *t; - - t = strdup(option+7); - if (!t) - return log_oom(); - - free(arg_cipher); - arg_cipher = t; - - } else if (startswith(option, "size=")) { - - if (safe_atou(option+5, &arg_key_size) < 0) { - log_error("size= parse failure, ignoring."); - return 0; - } - - if (arg_key_size % 8) { - log_error("size= not a multiple of 8, ignoring."); - return 0; - } - - arg_key_size /= 8; - - } else if (startswith(option, "key-slot=")) { - - arg_type = CRYPT_LUKS1; - if (safe_atoi(option+9, &arg_key_slot) < 0) { - log_error("key-slot= parse failure, ignoring."); - return 0; - } - - } else if (startswith(option, "tcrypt-keyfile=")) { - - arg_type = CRYPT_TCRYPT; - if (path_is_absolute(option+15)) { - if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0) - return log_oom(); - } else - log_error("Key file path '%s' is not absolute. Ignoring.", option+15); - - } else if (startswith(option, "keyfile-size=")) { - - if (safe_atou(option+13, &arg_keyfile_size) < 0) { - log_error("keyfile-size= parse failure, ignoring."); - return 0; - } - - } else if (startswith(option, "keyfile-offset=")) { - - if (safe_atou(option+15, &arg_keyfile_offset) < 0) { - log_error("keyfile-offset= parse failure, ignoring."); - return 0; - } - - } else if (startswith(option, "hash=")) { - char *t; - - t = strdup(option+5); - if (!t) - return log_oom(); - - free(arg_hash); - arg_hash = t; - - } else if (startswith(option, "header=")) { - arg_type = CRYPT_LUKS1; - - if (!path_is_absolute(option+7)) { - log_error("Header path '%s' is not absolute, refusing.", option+7); - return -EINVAL; - } - - if (arg_header) { - log_error("Duplicate header= options, refusing."); - return -EINVAL; - } - - arg_header = strdup(option+7); - if (!arg_header) - return log_oom(); - - } else if (startswith(option, "tries=")) { - - if (safe_atou(option+6, &arg_tries) < 0) { - log_error("tries= parse failure, ignoring."); - return 0; - } - - } else if (STR_IN_SET(option, "readonly", "read-only")) - arg_readonly = true; - else if (streq(option, "verify")) - arg_verify = true; - else if (STR_IN_SET(option, "allow-discards", "discard")) - arg_discards = true; - else if (streq(option, "luks")) - arg_type = CRYPT_LUKS1; - else if (streq(option, "tcrypt")) - arg_type = CRYPT_TCRYPT; - else if (streq(option, "tcrypt-hidden")) { - arg_type = CRYPT_TCRYPT; - arg_tcrypt_hidden = true; - } else if (streq(option, "tcrypt-system")) { - arg_type = CRYPT_TCRYPT; - arg_tcrypt_system = true; - } else if (streq(option, "tcrypt-veracrypt")) { -#ifdef CRYPT_TCRYPT_VERA_MODES - arg_type = CRYPT_TCRYPT; - arg_tcrypt_veracrypt = true; -#else - log_error("This version of cryptsetup does not support tcrypt-veracrypt; refusing."); - return -EINVAL; -#endif - } else if (STR_IN_SET(option, "plain", "swap", "tmp")) - arg_type = CRYPT_PLAIN; - else if (startswith(option, "timeout=")) { - - if (parse_sec(option+8, &arg_timeout) < 0) { - log_error("timeout= parse failure, ignoring."); - return 0; - } - - } else if (startswith(option, "offset=")) { - - if (safe_atou64(option+7, &arg_offset) < 0) { - log_error("offset= parse failure, refusing."); - return -EINVAL; - } - - } else if (startswith(option, "skip=")) { - - if (safe_atou64(option+5, &arg_skip) < 0) { - log_error("skip= parse failure, refusing."); - return -EINVAL; - } - - } else if (!streq(option, "none")) - log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option); - - return 0; -} - -static int parse_options(const char *options) { - const char *word, *state; - size_t l; - int r; - - assert(options); - - FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { - _cleanup_free_ char *o; - - o = strndup(word, l); - if (!o) - return -ENOMEM; - r = parse_one_option(o); - if (r < 0) - return r; - } - - /* sanity-check options */ - if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { - if (arg_offset) - log_warning("offset= ignored with type %s", arg_type); - if (arg_skip) - log_warning("skip= ignored with type %s", arg_type); - } - - return 0; -} - -static void log_glue(int level, const char *msg, void *usrptr) { - log_debug("%s", msg); -} - -static int disk_major_minor(const char *path, char **ret) { - struct stat st; - - assert(path); - - if (stat(path, &st) < 0) - return -errno; - - if (!S_ISBLK(st.st_mode)) - return -EINVAL; - - if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) - return -errno; - - return 0; -} - -static char* disk_description(const char *path) { - - static const char name_fields[] = - "ID_PART_ENTRY_NAME\0" - "DM_NAME\0" - "ID_MODEL_FROM_DATABASE\0" - "ID_MODEL\0"; - - _cleanup_(sd_device_unrefp) sd_device *device = NULL; - struct stat st; - const char *i; - int r; - - assert(path); - - if (stat(path, &st) < 0) - return NULL; - - if (!S_ISBLK(st.st_mode)) - return NULL; - - r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); - if (r < 0) - return NULL; - - NULSTR_FOREACH(i, name_fields) { - const char *name; - - r = sd_device_get_property_value(device, i, &name); - if (r >= 0 && !isempty(name)) - return strdup(name); - } - - return NULL; -} - -static char *disk_mount_point(const char *label) { - _cleanup_free_ char *device = NULL; - _cleanup_endmntent_ FILE *f = NULL; - struct mntent *m; - - /* Yeah, we don't support native systemd unit files here for now */ - - if (asprintf(&device, "/dev/mapper/%s", label) < 0) - return NULL; - - f = setmntent("/etc/fstab", "r"); - if (!f) - return NULL; - - while ((m = getmntent(f))) - if (path_equal(m->mnt_fsname, device)) - return strdup(m->mnt_dir); - - return NULL; -} - -static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) { - _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL; - _cleanup_strv_free_erase_ char **passwords = NULL; - const char *name = NULL; - char **p, *id; - int r = 0; - - assert(vol); - assert(src); - assert(ret); - - description = disk_description(src); - mount_point = disk_mount_point(vol); - - if (description && streq(vol, description)) - /* If the description string is simply the - * volume name, then let's not show this - * twice */ - description = mfree(description); - - if (mount_point && description) - r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); - else if (mount_point) - r = asprintf(&name_buffer, "%s on %s", vol, mount_point); - else if (description) - r = asprintf(&name_buffer, "%s (%s)", description, vol); - - if (r < 0) - return log_oom(); - - name = name_buffer ? name_buffer : vol; - - if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) - return log_oom(); - - if (src) - (void) disk_major_minor(src, &maj_min); - - if (maj_min) { - escaped_name = maj_min; - maj_min = NULL; - } else - escaped_name = cescape(name); - - if (!escaped_name) - return log_oom(); - - id = strjoina("cryptsetup:", escaped_name); - - r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, - ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED), - &passwords); - if (r < 0) - return log_error_errno(r, "Failed to query password: %m"); - - if (arg_verify) { - _cleanup_strv_free_erase_ char **passwords2 = NULL; - - assert(strv_length(passwords) == 1); - - if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) - return log_oom(); - - id = strjoina("cryptsetup-verification:", escaped_name); - - r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); - if (r < 0) - return log_error_errno(r, "Failed to query verification password: %m"); - - assert(strv_length(passwords2) == 1); - - if (!streq(passwords[0], passwords2[0])) { - log_warning("Passwords did not match, retrying."); - return -EAGAIN; - } - } - - strv_uniq(passwords); - - STRV_FOREACH(p, passwords) { - char *c; - - if (strlen(*p)+1 >= arg_key_size) - continue; - - /* Pad password if necessary */ - c = new(char, arg_key_size); - if (!c) - return log_oom(); - - strncpy(c, *p, arg_key_size); - free(*p); - *p = c; - } - - *ret = passwords; - passwords = NULL; - - return 0; -} - -static int attach_tcrypt( - struct crypt_device *cd, - const char *name, - const char *key_file, - char **passwords, - uint32_t flags) { - - int r = 0; - _cleanup_free_ char *passphrase = NULL; - struct crypt_params_tcrypt params = { - .flags = CRYPT_TCRYPT_LEGACY_MODES, - .keyfiles = (const char **)arg_tcrypt_keyfiles, - .keyfiles_count = strv_length(arg_tcrypt_keyfiles) - }; - - assert(cd); - assert(name); - assert(key_file || (passwords && passwords[0])); - - if (arg_tcrypt_hidden) - params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; - - if (arg_tcrypt_system) - params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; - -#ifdef CRYPT_TCRYPT_VERA_MODES - if (arg_tcrypt_veracrypt) - params.flags |= CRYPT_TCRYPT_VERA_MODES; -#endif - - if (key_file) { - r = read_one_line_file(key_file, &passphrase); - if (r < 0) { - log_error_errno(r, "Failed to read password file '%s': %m", key_file); - return -EAGAIN; - } - - params.passphrase = passphrase; - } else - params.passphrase = passwords[0]; - params.passphrase_size = strlen(params.passphrase); - - r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); - if (r < 0) { - if (key_file && r == -EPERM) { - log_error("Failed to activate using password file '%s'.", key_file); - return -EAGAIN; - } - return r; - } - - return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); -} - -static int attach_luks_or_plain(struct crypt_device *cd, - const char *name, - const char *key_file, - const char *data_device, - char **passwords, - uint32_t flags) { - int r = 0; - bool pass_volume_key = false; - - assert(cd); - assert(name); - assert(key_file || passwords); - - if (!arg_type || streq(arg_type, CRYPT_LUKS1)) { - r = crypt_load(cd, CRYPT_LUKS1, NULL); - if (r < 0) { - log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); - return r; - } - - if (data_device) - r = crypt_set_data_device(cd, data_device); - } - - if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { - struct crypt_params_plain params = { - .offset = arg_offset, - .skip = arg_skip, - }; - const char *cipher, *cipher_mode; - _cleanup_free_ char *truncated_cipher = NULL; - - if (arg_hash) { - /* plain isn't a real hash type. it just means "use no hash" */ - if (!streq(arg_hash, "plain")) - params.hash = arg_hash; - } else if (!key_file) - /* for CRYPT_PLAIN, the behaviour of cryptsetup - * package is to not hash when a key file is provided */ - params.hash = "ripemd160"; - - if (arg_cipher) { - size_t l; - - l = strcspn(arg_cipher, "-"); - truncated_cipher = strndup(arg_cipher, l); - if (!truncated_cipher) - return log_oom(); - - cipher = truncated_cipher; - cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; - } else { - cipher = "aes"; - cipher_mode = "cbc-essiv:sha256"; - } - - /* for CRYPT_PLAIN limit reads - * from keyfile to key length, and - * ignore keyfile-size */ - arg_keyfile_size = arg_key_size; - - /* In contrast to what the name - * crypt_setup() might suggest this - * doesn't actually format anything, - * it just configures encryption - * parameters when used for plain - * mode. */ - r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, ¶ms); - - /* hash == NULL implies the user passed "plain" */ - pass_volume_key = (params.hash == NULL); - } - - if (r < 0) - return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); - - log_info("Set cipher %s, mode %s, key size %i bits for device %s.", - crypt_get_cipher(cd), - crypt_get_cipher_mode(cd), - crypt_get_volume_key_size(cd)*8, - crypt_get_device_name(cd)); - - if (key_file) { - r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags); - if (r < 0) { - log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); - return -EAGAIN; - } - } else { - char **p; - - STRV_FOREACH(p, passwords) { - if (pass_volume_key) - r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); - else - r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); - - if (r >= 0) - break; - } - } - - return r; -} - -static int help(void) { - - printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" - "%s detach VOLUME\n\n" - "Attaches or detaches an encrypted block device.\n", - program_invocation_short_name, - program_invocation_short_name); - - return 0; -} - -int main(int argc, char *argv[]) { - int r = EXIT_FAILURE; - struct crypt_device *cd = NULL; - - if (argc <= 1) { - help(); - return EXIT_SUCCESS; - } - - if (argc < 3) { - log_error("This program requires at least two arguments."); - return EXIT_FAILURE; - } - - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); - - umask(0022); - - if (streq(argv[1], "attach")) { - uint32_t flags = 0; - int k; - unsigned tries; - usec_t until; - crypt_status_info status; - const char *key_file = NULL; - - /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ - - if (argc < 4) { - log_error("attach requires at least two arguments."); - goto finish; - } - - if (argc >= 5 && - argv[4][0] && - !streq(argv[4], "-") && - !streq(argv[4], "none")) { - - if (!path_is_absolute(argv[4])) - log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); - else - key_file = argv[4]; - } - - if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { - if (parse_options(argv[5]) < 0) - goto finish; - } - - /* A delicious drop of snake oil */ - mlockall(MCL_FUTURE); - - if (arg_header) { - log_debug("LUKS header: %s", arg_header); - k = crypt_init(&cd, arg_header); - } else - k = crypt_init(&cd, argv[3]); - if (k) { - log_error_errno(k, "crypt_init() failed: %m"); - 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 = EXIT_SUCCESS; - goto finish; - } - - if (arg_readonly) - flags |= CRYPT_ACTIVATE_READONLY; - - if (arg_discards) - flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; - - if (arg_timeout > 0) - until = now(CLOCK_MONOTONIC) + arg_timeout; - else - until = 0; - - arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); - - if (key_file) { - struct stat st; - - /* Ideally we'd do this on the open fd, but since this is just a - * warning it's OK to do this in two steps. */ - if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) - log_warning("Key file %s is world-readable. This is not a good idea!", key_file); - } - - for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { - _cleanup_strv_free_erase_ char **passwords = NULL; - - if (!key_file) { - k = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); - if (k == -EAGAIN) - continue; - else if (k < 0) - goto finish; - } - - if (streq_ptr(arg_type, CRYPT_TCRYPT)) - k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); - else - k = attach_luks_or_plain(cd, - argv[2], - key_file, - arg_header ? argv[3] : NULL, - passwords, - flags); - if (k >= 0) - break; - else if (k == -EAGAIN) { - key_file = NULL; - continue; - } else if (k != -EPERM) { - log_error_errno(k, "Failed to activate: %m"); - goto finish; - } - - log_warning("Invalid passphrase."); - } - - if (arg_tries != 0 && tries >= arg_tries) { - log_error("Too many attempts; giving up."); - r = EXIT_FAILURE; - goto finish; - } - - } else if (streq(argv[1], "detach")) { - int k; - - k = crypt_init_by_name(&cd, argv[2]); - if (k == -ENODEV) { - log_info("Volume %s already inactive.", argv[2]); - r = EXIT_SUCCESS; - goto finish; - } else if (k) { - log_error_errno(k, "crypt_init_by_name() failed: %m"); - goto finish; - } - - crypt_set_log_callback(cd, log_glue, NULL); - - k = crypt_deactivate(cd, argv[2]); - if (k < 0) { - log_error_errno(k, "Failed to deactivate: %m"); - goto finish; - } - - } else { - log_error("Unknown verb %s.", argv[1]); - goto finish; - } - - r = EXIT_SUCCESS; - -finish: - - if (cd) - crypt_free(cd); - - free(arg_cipher); - free(arg_hash); - free(arg_header); - strv_free(arg_tcrypt_keyfiles); - - return r; -} |