From 0629b78d815ce6a0b65aecc02fb18a122226274c Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Wed, 25 May 2016 23:32:14 -0400 Subject: stuff --- src/cryptsetup/cryptsetup.c | 753 -------------------------------------------- 1 file changed, 753 deletions(-) delete mode 100644 src/cryptsetup/cryptsetup.c (limited to 'src/cryptsetup/cryptsetup.c') diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c deleted file mode 100644 index 2ef966257a..0000000000 --- a/src/cryptsetup/cryptsetup.c +++ /dev/null @@ -1,753 +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 . -***/ - -#include -#include -#include -#include -#include - -#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 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 (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; - - 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) { - log_error_errno(k, "crypt_init() 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; -} -- cgit v1.2.3-54-g00ecf