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-rw-r--r--src/cryptsetup/cryptsetup.c2423
1 files changed, 2423 insertions, 0 deletions
diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
new file mode 100644
index 0000000..b56b51a
--- /dev/null
+++ b/src/cryptsetup/cryptsetup.c
@@ -0,0 +1,2423 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <getopt.h>
+#include <mntent.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "sd-device.h"
+#include "sd-messages.h"
+
+#include "alloc-util.h"
+#include "ask-password-api.h"
+#include "build.h"
+#include "cryptsetup-fido2.h"
+#include "cryptsetup-keyfile.h"
+#include "cryptsetup-pkcs11.h"
+#include "cryptsetup-tpm2.h"
+#include "cryptsetup-util.h"
+#include "device-util.h"
+#include "efi-api.h"
+#include "efi-loader.h"
+#include "env-util.h"
+#include "escape.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "fstab-util.h"
+#include "hexdecoct.h"
+#include "libfido2-util.h"
+#include "log.h"
+#include "main-func.h"
+#include "memory-util.h"
+#include "mount-util.h"
+#include "nulstr-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "pkcs11-util.h"
+#include "pretty-print.h"
+#include "process-util.h"
+#include "random-util.h"
+#include "string-table.h"
+#include "strv.h"
+#include "tpm2-pcr.h"
+#include "tpm2-util.h"
+
+/* internal helper */
+#define ANY_LUKS "LUKS"
+/* as in src/cryptsetup.h */
+#define CRYPT_SECTOR_SIZE 512U
+#define CRYPT_MAX_SECTOR_SIZE 4096U
+
+typedef enum PassphraseType {
+ PASSPHRASE_NONE,
+ PASSPHRASE_REGULAR = 1 << 0,
+ PASSPHRASE_RECOVERY_KEY = 1 << 1,
+ PASSPHRASE_BOTH = PASSPHRASE_REGULAR|PASSPHRASE_RECOVERY_KEY,
+ _PASSPHRASE_TYPE_MAX,
+ _PASSPHRASE_TYPE_INVALID = -1,
+} PassphraseType;
+
+static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT, CRYPT_BITLK or CRYPT_PLAIN */
+static char *arg_cipher = NULL;
+static unsigned arg_key_size = 0;
+static unsigned arg_sector_size = CRYPT_SECTOR_SIZE;
+static int arg_key_slot = CRYPT_ANY_SLOT;
+static unsigned arg_keyfile_size = 0;
+static uint64_t arg_keyfile_offset = 0;
+static bool arg_keyfile_erase = false;
+static bool arg_try_empty_password = false;
+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 AskPasswordFlags arg_ask_password_flags = 0;
+static bool arg_discards = false;
+static bool arg_same_cpu_crypt = false;
+static bool arg_submit_from_crypt_cpus = false;
+static bool arg_no_read_workqueue = false;
+static bool arg_no_write_workqueue = false;
+static bool arg_tcrypt_hidden = false;
+static bool arg_tcrypt_system = false;
+static bool arg_tcrypt_veracrypt = false;
+static uint32_t arg_tcrypt_veracrypt_pim = 0;
+static char **arg_tcrypt_keyfiles = NULL;
+static uint64_t arg_offset = 0;
+static uint64_t arg_skip = 0;
+static usec_t arg_timeout = USEC_INFINITY;
+static char *arg_pkcs11_uri = NULL;
+static bool arg_pkcs11_uri_auto = false;
+static char *arg_fido2_device = NULL;
+static bool arg_fido2_device_auto = false;
+static void *arg_fido2_cid = NULL;
+static size_t arg_fido2_cid_size = 0;
+static char *arg_fido2_rp_id = NULL;
+static char *arg_tpm2_device = NULL; /* These and the following fields are about locking an encrypted volume to the local TPM */
+static bool arg_tpm2_device_auto = false;
+static uint32_t arg_tpm2_pcr_mask = UINT32_MAX;
+static char *arg_tpm2_signature = NULL;
+static bool arg_tpm2_pin = false;
+static char *arg_tpm2_pcrlock = NULL;
+static bool arg_headless = false;
+static usec_t arg_token_timeout_usec = 30*USEC_PER_SEC;
+static unsigned arg_tpm2_measure_pcr = UINT_MAX; /* This and the following field is about measuring the unlocked volume key to the local TPM */
+static char **arg_tpm2_measure_banks = NULL;
+
+STATIC_DESTRUCTOR_REGISTER(arg_cipher, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_hash, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_header, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_tcrypt_keyfiles, strv_freep);
+STATIC_DESTRUCTOR_REGISTER(arg_pkcs11_uri, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_fido2_device, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_fido2_cid, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_fido2_rp_id, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_tpm2_device, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_tpm2_signature, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_tpm2_measure_banks, strv_freep);
+STATIC_DESTRUCTOR_REGISTER(arg_tpm2_pcrlock, freep);
+
+static const char* const passphrase_type_table[_PASSPHRASE_TYPE_MAX] = {
+ [PASSPHRASE_REGULAR] = "passphrase",
+ [PASSPHRASE_RECOVERY_KEY] = "recovery key",
+ [PASSPHRASE_BOTH] = "passphrase or recovery key",
+};
+
+const char* passphrase_type_to_string(PassphraseType t);
+PassphraseType passphrase_type_from_string(const char *s);
+
+DEFINE_STRING_TABLE_LOOKUP(passphrase_type, PassphraseType);
+
+/* Options Debian's crypttab knows we don't:
+ check=
+ checkargs=
+ noearly
+ loud
+ quiet
+ keyscript=
+ initramfs
+*/
+
+static int parse_one_option(const char *option) {
+ const char *val;
+ int r;
+
+ assert(option);
+
+ /* Handled outside of this tool */
+ if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev", "keyfile-timeout"))
+ return 0;
+
+ if (startswith(option, "keyfile-timeout="))
+ return 0;
+
+ if ((val = startswith(option, "cipher="))) {
+ r = free_and_strdup(&arg_cipher, val);
+ if (r < 0)
+ return log_oom();
+
+ } else if ((val = startswith(option, "size="))) {
+
+ r = safe_atou(val, &arg_key_size);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ if (arg_key_size % 8) {
+ log_warning("size= not a multiple of 8, ignoring.");
+ return 0;
+ }
+
+ arg_key_size /= 8;
+
+ } else if ((val = startswith(option, "sector-size="))) {
+
+ r = safe_atou(val, &arg_sector_size);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ if (arg_sector_size % 2) {
+ log_warning("sector-size= not a multiple of 2, ignoring.");
+ return 0;
+ }
+
+ if (arg_sector_size < CRYPT_SECTOR_SIZE || arg_sector_size > CRYPT_MAX_SECTOR_SIZE)
+ log_warning("sector-size= is outside of %u and %u, ignoring.", CRYPT_SECTOR_SIZE, CRYPT_MAX_SECTOR_SIZE);
+
+ } else if ((val = startswith(option, "key-slot=")) ||
+ (val = startswith(option, "keyslot="))) {
+
+ arg_type = ANY_LUKS;
+ r = safe_atoi(val, &arg_key_slot);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+
+ } else if ((val = startswith(option, "tcrypt-keyfile="))) {
+
+ arg_type = CRYPT_TCRYPT;
+ if (path_is_absolute(val)) {
+ if (strv_extend(&arg_tcrypt_keyfiles, val) < 0)
+ return log_oom();
+ } else
+ log_warning("Key file path \"%s\" is not absolute, ignoring.", val);
+
+ } else if ((val = startswith(option, "keyfile-size="))) {
+
+ r = safe_atou(val, &arg_keyfile_size);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+
+ } else if ((val = startswith(option, "keyfile-offset="))) {
+
+ r = safe_atou64(val, &arg_keyfile_offset);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+
+ } else if ((val = startswith(option, "keyfile-erase="))) {
+
+ r = parse_boolean(val);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ arg_keyfile_erase = r;
+
+ } else if (streq(option, "keyfile-erase"))
+ arg_keyfile_erase = true;
+
+ else if ((val = startswith(option, "hash="))) {
+ r = free_and_strdup(&arg_hash, val);
+ if (r < 0)
+ return log_oom();
+
+ } else if ((val = startswith(option, "header="))) {
+ if (!arg_type || !STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT))
+ arg_type = ANY_LUKS;
+
+ if (!path_is_absolute(val))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Header path \"%s\" is not absolute, refusing.", val);
+
+ if (arg_header)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Duplicate header= option, refusing.");
+
+ arg_header = strdup(val);
+ if (!arg_header)
+ return log_oom();
+
+ } else if ((val = startswith(option, "tries="))) {
+
+ r = safe_atou(val, &arg_tries);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+
+ } else if (STR_IN_SET(option, "readonly", "read-only"))
+ arg_readonly = true;
+ else if (streq(option, "verify"))
+ arg_verify = true;
+ else if ((val = startswith(option, "password-echo="))) {
+ if (streq(val, "masked"))
+ arg_ask_password_flags &= ~(ASK_PASSWORD_ECHO|ASK_PASSWORD_SILENT);
+ else {
+ r = parse_boolean(val);
+ if (r < 0) {
+ log_warning_errno(r, "Invalid password-echo= option \"%s\", ignoring.", val);
+ return 0;
+ }
+
+ SET_FLAG(arg_ask_password_flags, ASK_PASSWORD_ECHO, r);
+ SET_FLAG(arg_ask_password_flags, ASK_PASSWORD_SILENT, !r);
+ }
+ } else if (STR_IN_SET(option, "allow-discards", "discard"))
+ arg_discards = true;
+ else if (streq(option, "same-cpu-crypt"))
+ arg_same_cpu_crypt = true;
+ else if (streq(option, "submit-from-crypt-cpus"))
+ arg_submit_from_crypt_cpus = true;
+ else if (streq(option, "no-read-workqueue"))
+ arg_no_read_workqueue = true;
+ else if (streq(option, "no-write-workqueue"))
+ arg_no_write_workqueue = true;
+ else if (streq(option, "luks"))
+ arg_type = ANY_LUKS;
+/* since cryptsetup 2.3.0 (Feb 2020) */
+#ifdef CRYPT_BITLK
+ else if (streq(option, "bitlk"))
+ arg_type = CRYPT_BITLK;
+#endif
+ else if (streq(option, "tcrypt"))
+ arg_type = CRYPT_TCRYPT;
+ else if (STR_IN_SET(option, "tcrypt-hidden", "tcrypthidden")) {
+ 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, "tcrypt-veracrypt", "veracrypt")) {
+ arg_type = CRYPT_TCRYPT;
+ arg_tcrypt_veracrypt = true;
+ } else if ((val = startswith(option, "veracrypt-pim="))) {
+
+ r = safe_atou32(val, &arg_tcrypt_veracrypt_pim);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+ } else if (STR_IN_SET(option, "plain", "swap", "tmp") ||
+ startswith(option, "tmp="))
+ arg_type = CRYPT_PLAIN;
+ else if ((val = startswith(option, "timeout="))) {
+
+ r = parse_sec_fix_0(val, &arg_timeout);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+
+ } else if ((val = startswith(option, "offset="))) {
+
+ r = safe_atou64(val, &arg_offset);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse %s: %m", option);
+
+ } else if ((val = startswith(option, "skip="))) {
+
+ r = safe_atou64(val, &arg_skip);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse %s: %m", option);
+
+ } else if ((val = startswith(option, "pkcs11-uri="))) {
+
+ if (streq(val, "auto")) {
+ arg_pkcs11_uri = mfree(arg_pkcs11_uri);
+ arg_pkcs11_uri_auto = true;
+ } else {
+ if (!pkcs11_uri_valid(val))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "pkcs11-uri= parameter expects a PKCS#11 URI, refusing");
+
+ r = free_and_strdup(&arg_pkcs11_uri, val);
+ if (r < 0)
+ return log_oom();
+
+ arg_pkcs11_uri_auto = false;
+ }
+
+ } else if ((val = startswith(option, "fido2-device="))) {
+
+ if (streq(val, "auto")) {
+ arg_fido2_device = mfree(arg_fido2_device);
+ arg_fido2_device_auto = true;
+ } else {
+ r = free_and_strdup(&arg_fido2_device, val);
+ if (r < 0)
+ return log_oom();
+
+ arg_fido2_device_auto = false;
+ }
+
+ } else if ((val = startswith(option, "fido2-cid="))) {
+
+ if (streq(val, "auto"))
+ arg_fido2_cid = mfree(arg_fido2_cid);
+ else {
+ _cleanup_free_ void *cid = NULL;
+ size_t cid_size;
+
+ r = unbase64mem(val, SIZE_MAX, &cid, &cid_size);
+ if (r < 0)
+ return log_error_errno(r, "Failed to decode FIDO2 CID data: %m");
+
+ free(arg_fido2_cid);
+ arg_fido2_cid = TAKE_PTR(cid);
+ arg_fido2_cid_size = cid_size;
+ }
+
+ /* Turn on FIDO2 as side-effect, if not turned on yet. */
+ if (!arg_fido2_device && !arg_fido2_device_auto)
+ arg_fido2_device_auto = true;
+
+ } else if ((val = startswith(option, "fido2-rp="))) {
+
+ r = free_and_strdup(&arg_fido2_rp_id, val);
+ if (r < 0)
+ return log_oom();
+
+ } else if ((val = startswith(option, "tpm2-device="))) {
+
+ if (streq(val, "auto")) {
+ arg_tpm2_device = mfree(arg_tpm2_device);
+ arg_tpm2_device_auto = true;
+ } else {
+ r = free_and_strdup(&arg_tpm2_device, val);
+ if (r < 0)
+ return log_oom();
+
+ arg_tpm2_device_auto = false;
+ }
+
+ } else if ((val = startswith(option, "tpm2-pcrs="))) {
+
+ r = tpm2_parse_pcr_argument_to_mask(val, &arg_tpm2_pcr_mask);
+ if (r < 0)
+ return r;
+
+ } else if ((val = startswith(option, "tpm2-signature="))) {
+
+ if (!path_is_absolute(val))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "TPM2 signature path \"%s\" is not absolute, refusing.", val);
+
+ r = free_and_strdup(&arg_tpm2_signature, val);
+ if (r < 0)
+ return log_oom();
+
+ } else if ((val = startswith(option, "tpm2-pin="))) {
+
+ r = parse_boolean(val);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ arg_tpm2_pin = r;
+
+ } else if ((val = startswith(option, "tpm2-pcrlock="))) {
+
+ if (!path_is_absolute(val))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "TPM2 pcrlock policy path \"%s\" is not absolute, refusing.", val);
+
+ r = free_and_strdup(&arg_tpm2_pcrlock, val);
+ if (r < 0)
+ return log_oom();
+
+ } else if ((val = startswith(option, "tpm2-measure-pcr="))) {
+ unsigned pcr;
+
+ r = safe_atou(val, &pcr);
+ if (r < 0) {
+ r = parse_boolean(val);
+ if (r < 0) {
+ log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ pcr = r ? TPM2_PCR_SYSTEM_IDENTITY : UINT_MAX;
+ } else if (!TPM2_PCR_INDEX_VALID(pcr)) {
+ log_warning("Selected TPM index for measurement %u outside of allowed range 0…%u, ignoring.", pcr, TPM2_PCRS_MAX-1);
+ return 0;
+ }
+
+ arg_tpm2_measure_pcr = pcr;
+
+ } else if ((val = startswith(option, "tpm2-measure-bank="))) {
+
+#if HAVE_OPENSSL
+ _cleanup_strv_free_ char **l = NULL;
+
+ l = strv_split(optarg, ":");
+ if (!l)
+ return log_oom();
+
+ STRV_FOREACH(i, l) {
+ const EVP_MD *implementation;
+
+ implementation = EVP_get_digestbyname(*i);
+ if (!implementation)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown bank '%s', refusing.", val);
+
+ if (strv_extend(&arg_tpm2_measure_banks, EVP_MD_name(implementation)) < 0)
+ return log_oom();
+ }
+#else
+ log_error("Build lacks OpenSSL support, cannot measure to PCR banks, ignoring: %s", option);
+#endif
+
+ } else if ((val = startswith(option, "try-empty-password="))) {
+
+ r = parse_boolean(val);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ arg_try_empty_password = r;
+
+ } else if (streq(option, "try-empty-password"))
+ arg_try_empty_password = true;
+ else if ((val = startswith(option, "headless="))) {
+
+ r = parse_boolean(val);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ arg_headless = r;
+ } else if (streq(option, "headless"))
+ arg_headless = true;
+
+ else if ((val = startswith(option, "token-timeout="))) {
+
+ r = parse_sec_fix_0(val, &arg_token_timeout_usec);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse %s, ignoring: %m", option);
+
+ } else if (!streq(option, "x-initrd.attach"))
+ log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
+
+ return 0;
+}
+
+static int parse_crypt_config(const char *options) {
+ assert(options);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ int r;
+
+ r = extract_first_word(&options, &word, ",", EXTRACT_DONT_COALESCE_SEPARATORS | EXTRACT_UNESCAPE_SEPARATORS);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse options: %m");
+ if (r == 0)
+ break;
+
+ r = parse_one_option(word);
+ if (r < 0)
+ return r;
+ }
+
+ /* sanity-check options */
+ if (arg_type && !streq(arg_type, CRYPT_PLAIN)) {
+ if (arg_offset != 0)
+ log_warning("offset= ignored with type %s", arg_type);
+ if (arg_skip != 0)
+ log_warning("skip= ignored with type %s", arg_type);
+ }
+
+ return 0;
+}
+
+static char* disk_description(const char *path) {
+ static const char name_fields[] =
+ "DM_NAME\0"
+ "ID_MODEL_FROM_DATABASE\0"
+ "ID_MODEL\0";
+
+ _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+ const char *name;
+ struct stat st;
+
+ assert(path);
+
+ if (stat(path, &st) < 0)
+ return NULL;
+
+ if (!S_ISBLK(st.st_mode))
+ return NULL;
+
+ if (sd_device_new_from_stat_rdev(&device, &st) < 0)
+ return NULL;
+
+ if (sd_device_get_property_value(device, "ID_PART_ENTRY_NAME", &name) >= 0) {
+ _cleanup_free_ char *unescaped = NULL;
+ ssize_t l;
+
+ /* ID_PART_ENTRY_NAME uses \x style escaping, using libblkid's blkid_encode_string(). Let's
+ * reverse this here to make the string more human friendly in case people embed spaces or
+ * other weird stuff. */
+
+ l = cunescape(name, UNESCAPE_RELAX, &unescaped);
+ if (l < 0) {
+ log_debug_errno(l, "Failed to unescape ID_PART_ENTRY_NAME, skipping device: %m");
+ return NULL;
+ }
+
+ if (!isempty(unescaped) && !string_has_cc(unescaped, NULL))
+ return TAKE_PTR(unescaped);
+ }
+
+ /* These need no unescaping. */
+ NULSTR_FOREACH(i, name_fields)
+ if (sd_device_get_property_value(device, i, &name) >= 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 */
+
+ device = strjoin("/dev/mapper/", label);
+ if (!device)
+ return NULL;
+
+ f = setmntent(fstab_path(), "re");
+ if (!f)
+ return NULL;
+
+ while ((m = getmntent(f)))
+ if (path_equal(m->mnt_fsname, device))
+ return strdup(m->mnt_dir);
+
+ return NULL;
+}
+
+static char *friendly_disk_name(const char *src, const char *vol) {
+ _cleanup_free_ char *description = NULL, *mount_point = NULL;
+ char *name_buffer = NULL;
+ int r;
+
+ assert(src);
+ assert(vol);
+
+ description = disk_description(src);
+ mount_point = disk_mount_point(vol);
+
+ /* If the description string is simply the volume name, then let's not show this twice */
+ if (description && streq(vol, description))
+ 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);
+ else
+ return strdup(vol);
+ if (r < 0)
+ return NULL;
+
+ return name_buffer;
+}
+
+static PassphraseType check_registered_passwords(struct crypt_device *cd) {
+ _cleanup_free_ bool *slots = NULL;
+ int slot_max;
+ PassphraseType passphrase_type = PASSPHRASE_NONE;
+
+ assert(cd);
+
+ if (!streq_ptr(crypt_get_type(cd), CRYPT_LUKS2)) {
+ log_debug("%s: not a LUKS2 device, only passphrases are supported", crypt_get_device_name(cd));
+ return PASSPHRASE_REGULAR;
+ }
+
+ /* Search all used slots */
+ assert_se((slot_max = crypt_keyslot_max(CRYPT_LUKS2)) > 0);
+ slots = new(bool, slot_max);
+ if (!slots)
+ return log_oom();
+
+ for (int slot = 0; slot < slot_max; slot++)
+ slots[slot] = IN_SET(crypt_keyslot_status(cd, slot), CRYPT_SLOT_ACTIVE, CRYPT_SLOT_ACTIVE_LAST);
+
+ /* Iterate all LUKS2 tokens and keep track of all their slots */
+ for (int token = 0; token < sym_crypt_token_max(CRYPT_LUKS2); token++) {
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+ const char *type;
+ JsonVariant *w, *z;
+ int tk;
+
+ tk = cryptsetup_get_token_as_json(cd, token, NULL, &v);
+ if (IN_SET(tk, -ENOENT, -EINVAL))
+ continue;
+ if (tk < 0) {
+ log_warning_errno(tk, "Failed to read JSON token data, ignoring: %m");
+ continue;
+ }
+
+ w = json_variant_by_key(v, "type");
+ if (!w || !json_variant_is_string(w)) {
+ log_warning("Token JSON data lacks type field, ignoring.");
+ continue;
+ }
+
+ type = json_variant_string(w);
+ if (STR_IN_SET(type, "systemd-recovery", "systemd-pkcs11", "systemd-fido2", "systemd-tpm2")) {
+
+ /* At least exists one recovery key */
+ if (streq(type, "systemd-recovery"))
+ passphrase_type |= PASSPHRASE_RECOVERY_KEY;
+
+ w = json_variant_by_key(v, "keyslots");
+ if (!w || !json_variant_is_array(w)) {
+ log_warning("Token JSON data lacks keyslots field, ignoring.");
+ continue;
+ }
+
+ JSON_VARIANT_ARRAY_FOREACH(z, w) {
+ unsigned u;
+ int at;
+
+ if (!json_variant_is_string(z)) {
+ log_warning("Token JSON data's keyslot field is not an array of strings, ignoring.");
+ continue;
+ }
+
+ at = safe_atou(json_variant_string(z), &u);
+ if (at < 0) {
+ log_warning_errno(at, "Token JSON data's keyslot field is not an integer formatted as string, ignoring.");
+ continue;
+ }
+
+ if (u >= (unsigned) slot_max) {
+ log_warning_errno(at, "Token JSON data's keyslot field exceeds the maximum value allowed, ignoring.");
+ continue;
+ }
+
+ slots[u] = false;
+ }
+ }
+ }
+
+ /* Check if any of the slots is not referenced by systemd tokens */
+ for (int slot = 0; slot < slot_max; slot++)
+ if (slots[slot]) {
+ passphrase_type |= PASSPHRASE_REGULAR;
+ break;
+ }
+
+ /* All the slots are referenced by systemd tokens, so if a recovery key is not enrolled,
+ * we will not be able to enter a passphrase. */
+ return passphrase_type;
+}
+
+static int get_password(
+ const char *vol,
+ const char *src,
+ usec_t until,
+ bool accept_cached,
+ PassphraseType passphrase_type,
+ char ***ret) {
+
+ _cleanup_free_ char *friendly = NULL, *text = NULL, *disk_path = NULL;
+ _cleanup_strv_free_erase_ char **passwords = NULL;
+ char *id;
+ int r = 0;
+ AskPasswordFlags flags = arg_ask_password_flags | ASK_PASSWORD_PUSH_CACHE;
+
+ assert(vol);
+ assert(src);
+ assert(ret);
+
+ if (arg_headless)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOPKG), "Password querying disabled via 'headless' option.");
+
+ friendly = friendly_disk_name(src, vol);
+ if (!friendly)
+ return log_oom();
+
+ if (asprintf(&text, "Please enter %s for disk %s:", passphrase_type_to_string(passphrase_type), friendly) < 0)
+ return log_oom();
+
+ disk_path = cescape(src);
+ if (!disk_path)
+ return log_oom();
+
+ id = strjoina("cryptsetup:", disk_path);
+
+ r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", "cryptsetup.passphrase", until,
+ flags | (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 %s for disk %s (verification):", passphrase_type_to_string(passphrase_type), friendly) < 0)
+ return log_oom();
+
+ id = strjoina("cryptsetup-verification:", disk_path);
+
+ r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", "cryptsetup.passphrase", until, flags, &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]))
+ return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "Passwords did not match, retrying.");
+ }
+
+ 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);
+ erase_and_free(*p);
+ *p = TAKE_PTR(c);
+ }
+
+ *ret = TAKE_PTR(passwords);
+
+ return 0;
+}
+
+static int measure_volume_key(
+ struct crypt_device *cd,
+ const char *name,
+ const void *volume_key,
+ size_t volume_key_size) {
+
+ int r;
+
+ assert(cd);
+ assert(name);
+ assert(volume_key);
+ assert(volume_key_size > 0);
+
+ if (arg_tpm2_measure_pcr == UINT_MAX) {
+ log_debug("Not measuring volume key, deactivated.");
+ return 0;
+ }
+
+ r = efi_measured_uki(LOG_WARNING);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ log_debug("Kernel stub did not measure kernel image into the expected PCR, skipping userspace measurement, too.");
+ return 0;
+ }
+
+#if HAVE_TPM2
+ _cleanup_(tpm2_context_unrefp) Tpm2Context *c = NULL;
+ r = tpm2_context_new(arg_tpm2_device, &c);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create TPM2 context: %m");
+
+ _cleanup_strv_free_ char **l = NULL;
+ if (strv_isempty(arg_tpm2_measure_banks)) {
+ r = tpm2_get_good_pcr_banks_strv(c, UINT32_C(1) << arg_tpm2_measure_pcr, &l);
+ if (r < 0)
+ return log_error_errno(r, "Could not verify pcr banks: %m");
+ }
+
+ _cleanup_free_ char *joined = strv_join(l ?: arg_tpm2_measure_banks, ", ");
+ if (!joined)
+ return log_oom();
+
+ /* Note: we don't directly measure the volume key, it might be a security problem to send an
+ * unprotected direct hash of the secret volume key over the wire to the TPM. Hence let's instead
+ * send a HMAC signature instead. */
+
+ _cleanup_free_ char *escaped = NULL;
+ escaped = xescape(name, ":"); /* avoid ambiguity around ":" once we join things below */
+ if (!escaped)
+ return log_oom();
+
+ _cleanup_free_ char *s = NULL;
+ s = strjoin("cryptsetup:", escaped, ":", strempty(crypt_get_uuid(cd)));
+ if (!s)
+ return log_oom();
+
+ r = tpm2_extend_bytes(c, l ?: arg_tpm2_measure_banks, arg_tpm2_measure_pcr, s, SIZE_MAX, volume_key, volume_key_size, TPM2_EVENT_VOLUME_KEY, s);
+ if (r < 0)
+ return log_error_errno(r, "Could not extend PCR: %m");
+
+ log_struct(LOG_INFO,
+ "MESSAGE_ID=" SD_MESSAGE_TPM_PCR_EXTEND_STR,
+ LOG_MESSAGE("Successfully extended PCR index %u with '%s' and volume key (banks %s).", arg_tpm2_measure_pcr, s, joined),
+ "MEASURING=%s", s,
+ "PCR=%u", arg_tpm2_measure_pcr,
+ "BANKS=%s", joined);
+
+ return 0;
+#else
+ return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "TPM2 support disabled, not measuring.");
+#endif
+}
+
+static int measured_crypt_activate_by_volume_key(
+ struct crypt_device *cd,
+ const char *name,
+ const void *volume_key,
+ size_t volume_key_size,
+ uint32_t flags) {
+
+ int r;
+
+ assert(cd);
+ assert(name);
+
+ /* A wrapper around crypt_activate_by_volume_key() which also measures to a PCR if that's requested. */
+
+ r = crypt_activate_by_volume_key(cd, name, volume_key, volume_key_size, flags);
+ if (r < 0)
+ return r;
+
+ if (volume_key_size == 0) {
+ log_debug("Not measuring volume key, none specified.");
+ return r;
+ }
+
+ (void) measure_volume_key(cd, name, volume_key, volume_key_size); /* OK if fails */
+ return r;
+}
+
+static int measured_crypt_activate_by_passphrase(
+ struct crypt_device *cd,
+ const char *name,
+ int keyslot,
+ const char *passphrase,
+ size_t passphrase_size,
+ uint32_t flags) {
+
+ _cleanup_(erase_and_freep) void *vk = NULL;
+ size_t vks;
+ int r;
+
+ assert(cd);
+
+ /* A wrapper around crypt_activate_by_passphrase() which also measures to a PCR if that's
+ * requested. Note that we need the volume key for the measurement, and
+ * crypt_activate_by_passphrase() doesn't give us access to this. Hence, we operate indirectly, and
+ * retrieve the volume key first, and then activate through that. */
+
+ if (arg_tpm2_measure_pcr == UINT_MAX) {
+ log_debug("Not measuring volume key, deactivated.");
+ goto shortcut;
+ }
+
+ r = crypt_get_volume_key_size(cd);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ log_debug("Not measuring volume key, none defined.");
+ goto shortcut;
+ }
+
+ vk = malloc(vks = r);
+ if (!vk)
+ return -ENOMEM;
+
+ r = crypt_volume_key_get(cd, keyslot, vk, &vks, passphrase, passphrase_size);
+ if (r < 0)
+ return r;
+
+ return measured_crypt_activate_by_volume_key(cd, name, vk, vks, flags);
+
+shortcut:
+ return crypt_activate_by_passphrase(cd, name, keyslot, passphrase, passphrase_size, flags);
+}
+
+static int attach_tcrypt(
+ struct crypt_device *cd,
+ const char *name,
+ const char *key_file,
+ const void *key_data,
+ size_t key_data_size,
+ char **passwords,
+ uint32_t flags) {
+
+ int r = 0;
+ _cleanup_(erase_and_freep) 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 || key_data || !strv_isempty(passwords));
+
+ if (arg_pkcs11_uri || arg_pkcs11_uri_auto || arg_fido2_device || arg_fido2_device_auto || arg_tpm2_device || arg_tpm2_device_auto)
+ /* Ask for a regular password */
+ return log_error_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "Sorry, but tcrypt devices are currently not supported in conjunction with pkcs11/fido2/tpm2 support.");
+
+ if (arg_tcrypt_hidden)
+ params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER;
+
+ if (arg_tcrypt_system)
+ params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER;
+
+ if (arg_tcrypt_veracrypt)
+ params.flags |= CRYPT_TCRYPT_VERA_MODES;
+
+ if (arg_tcrypt_veracrypt && arg_tcrypt_veracrypt_pim != 0)
+ params.veracrypt_pim = arg_tcrypt_veracrypt_pim;
+
+ if (key_data) {
+ params.passphrase = key_data;
+ params.passphrase_size = key_data_size;
+ r = crypt_load(cd, CRYPT_TCRYPT, &params);
+ } else 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; /* log with the actual error, but return EAGAIN */
+ }
+ params.passphrase = passphrase;
+ params.passphrase_size = strlen(passphrase);
+ r = crypt_load(cd, CRYPT_TCRYPT, &params);
+ } else {
+ r = -EINVAL;
+ STRV_FOREACH(p, passwords){
+ params.passphrase = *p;
+ params.passphrase_size = strlen(*p);
+ r = crypt_load(cd, CRYPT_TCRYPT, &params);
+ if (r >= 0)
+ break;
+ }
+ }
+
+ if (r < 0) {
+ if (r == -EPERM) {
+ if (key_data)
+ log_error_errno(r, "Failed to activate using discovered key. (Key not correct?)");
+ else if (key_file)
+ log_error_errno(r, "Failed to activate using password file '%s'. (Key data not correct?)", key_file);
+ else
+ log_error_errno(r, "Failed to activate using supplied passwords.");
+
+ return r;
+ }
+
+ return log_error_errno(r, "Failed to load tcrypt superblock on device %s: %m", crypt_get_device_name(cd));
+ }
+
+ r = measured_crypt_activate_by_volume_key(cd, name, NULL, 0, flags);
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate tcrypt device %s: %m", crypt_get_device_name(cd));
+
+ return 0;
+}
+
+static char *make_bindname(const char *volume) {
+ char *s;
+
+ if (asprintf(&s, "@%" PRIx64"/cryptsetup/%s", random_u64(), volume) < 0)
+ return NULL;
+
+ return s;
+}
+
+static int make_security_device_monitor(
+ sd_event **ret_event,
+ sd_device_monitor **ret_monitor) {
+ _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ int r;
+
+ assert(ret_event);
+ assert(ret_monitor);
+
+ /* Waits for a device with "security-device" tag to show up in udev */
+
+ r = sd_event_default(&event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate event loop: %m");
+
+ r = sd_event_add_time_relative(event, NULL, CLOCK_MONOTONIC, arg_token_timeout_usec, USEC_PER_SEC, NULL, INT_TO_PTR(-ETIMEDOUT));
+ if (r < 0)
+ return log_error_errno(r, "Failed to install timeout event source: %m");
+
+ r = sd_device_monitor_new(&monitor);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate device monitor: %m");
+
+ (void) sd_device_monitor_set_description(monitor, "security-device");
+
+ r = sd_device_monitor_filter_add_match_tag(monitor, "security-device");
+ if (r < 0)
+ return log_error_errno(r, "Failed to configure device monitor: %m");
+
+ r = sd_device_monitor_attach_event(monitor, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to attach device monitor: %m");
+
+ r = sd_device_monitor_start(monitor, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start device monitor: %m");
+
+ *ret_event = TAKE_PTR(event);
+ *ret_monitor = TAKE_PTR(monitor);
+ return 0;
+}
+
+static int run_security_device_monitor(
+ sd_event *event,
+ sd_device_monitor *monitor) {
+ bool processed = false;
+ int r;
+
+ assert(event);
+ assert(monitor);
+
+ /* Runs the event loop for the device monitor until either something happens, or the time-out is
+ * hit. */
+
+ for (;;) {
+ int x;
+
+ r = sd_event_get_exit_code(event, &x);
+ if (r < 0) {
+ if (r != -ENODATA)
+ return log_error_errno(r, "Failed to query exit code from event loop: %m");
+
+ /* On ENODATA we aren't told to exit yet. */
+ } else {
+ assert(x == -ETIMEDOUT);
+ return log_notice_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "Timed out waiting for security device, aborting security device based authentication attempt.");
+ }
+
+ /* Wait for one event, and then eat all subsequent events until there are no further ones */
+ r = sd_event_run(event, processed ? 0 : UINT64_MAX);
+ if (r < 0)
+ return log_error_errno(r, "Failed to run event loop: %m");
+ if (r == 0) /* no events queued anymore */
+ return 0;
+
+ processed = true;
+ }
+}
+
+static bool libcryptsetup_plugins_support(void) {
+
+#if HAVE_TPM2
+ /* Currently, there's no way for us to query the volume key when plugins are used. Hence don't use
+ * plugins, if measurement has been requested. */
+ if (arg_tpm2_measure_pcr != UINT_MAX)
+ return false;
+#endif
+
+#if HAVE_LIBCRYPTSETUP_PLUGINS
+ int r;
+
+ /* Permit a way to disable libcryptsetup token module support, for debugging purposes. */
+ r = getenv_bool("SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE");
+ if (r < 0 && r != -ENXIO)
+ log_debug_errno(r, "Failed to parse $SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE env var: %m");
+ if (r == 0)
+ return false;
+
+ return crypt_token_external_path();
+#else
+ return false;
+#endif
+}
+
+#if HAVE_LIBCRYPTSETUP_PLUGINS
+static int acquire_pins_from_env_variable(char ***ret_pins) {
+ _cleanup_(erase_and_freep) char *envpin = NULL;
+ _cleanup_strv_free_erase_ char **pins = NULL;
+ int r;
+
+ assert(ret_pins);
+
+ r = getenv_steal_erase("PIN", &envpin);
+ if (r < 0)
+ return log_error_errno(r, "Failed to acquire PIN from environment: %m");
+ if (r > 0) {
+ pins = strv_new(envpin);
+ if (!pins)
+ return log_oom();
+ }
+
+ *ret_pins = TAKE_PTR(pins);
+
+ return 0;
+}
+#endif
+
+static int crypt_activate_by_token_pin_ask_password(
+ struct crypt_device *cd,
+ const char *name,
+ const char *type,
+ usec_t until,
+ bool headless,
+ void *userdata,
+ uint32_t activation_flags,
+ const char *message,
+ const char *key_name,
+ const char *credential_name) {
+
+#if HAVE_LIBCRYPTSETUP_PLUGINS
+ AskPasswordFlags flags = arg_ask_password_flags | ASK_PASSWORD_PUSH_CACHE | ASK_PASSWORD_ACCEPT_CACHED;
+ _cleanup_strv_free_erase_ char **pins = NULL;
+ int r;
+
+ r = crypt_activate_by_token_pin(cd, name, type, CRYPT_ANY_TOKEN, /* pin=*/ NULL, /* pin_size= */ 0, userdata, activation_flags);
+ if (r > 0) /* returns unlocked keyslot id on success */
+ return 0;
+ if (r != -ENOANO) /* needs pin or pin is wrong */
+ return r;
+
+ r = acquire_pins_from_env_variable(&pins);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(p, pins) {
+ r = crypt_activate_by_token_pin(cd, name, type, CRYPT_ANY_TOKEN, *p, strlen(*p), userdata, activation_flags);
+ if (r > 0) /* returns unlocked keyslot id on success */
+ return 0;
+ if (r != -ENOANO) /* needs pin or pin is wrong */
+ return r;
+ }
+
+ if (headless)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOPKG), "PIN querying disabled via 'headless' option. Use the '$PIN' environment variable.");
+
+ for (;;) {
+ pins = strv_free_erase(pins);
+ r = ask_password_auto(message, "drive-harddisk", /* id= */ NULL, key_name, credential_name, until, flags, &pins);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(p, pins) {
+ r = crypt_activate_by_token_pin(cd, name, type, CRYPT_ANY_TOKEN, *p, strlen(*p), userdata, activation_flags);
+ if (r > 0) /* returns unlocked keyslot id on success */
+ return 0;
+ if (r != -ENOANO) /* needs pin or pin is wrong */
+ return r;
+ }
+
+ flags &= ~ASK_PASSWORD_ACCEPT_CACHED;
+ }
+ return r;
+#else
+ return -EOPNOTSUPP;
+#endif
+}
+
+static int attach_luks2_by_fido2_via_plugin(
+ struct crypt_device *cd,
+ const char *name,
+ usec_t until,
+ bool headless,
+ void *userdata,
+ uint32_t activation_flags) {
+
+ return crypt_activate_by_token_pin_ask_password(
+ cd,
+ name,
+ "systemd-fido2",
+ until,
+ headless,
+ userdata,
+ activation_flags,
+ "Please enter security token PIN:",
+ "fido2-pin",
+ "cryptsetup.fido2-pin");
+}
+
+static int attach_luks_or_plain_or_bitlk_by_fido2(
+ struct crypt_device *cd,
+ const char *name,
+ const char *key_file,
+ const void *key_data,
+ size_t key_data_size,
+ usec_t until,
+ uint32_t flags,
+ bool pass_volume_key) {
+
+ _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL;
+ _cleanup_(erase_and_freep) void *decrypted_key = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ size_t decrypted_key_size, cid_size = 0;
+ _cleanup_free_ char *friendly = NULL;
+ int keyslot = arg_key_slot, r;
+ const char *rp_id = NULL;
+ const void *cid = NULL;
+ Fido2EnrollFlags required;
+ bool use_libcryptsetup_plugin = libcryptsetup_plugins_support();
+
+ assert(cd);
+ assert(name);
+ assert(arg_fido2_device || arg_fido2_device_auto);
+
+ if (arg_fido2_cid) {
+ if (!key_file && !key_data)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "FIDO2 mode with manual parameters selected, but no keyfile specified, refusing.");
+
+ rp_id = arg_fido2_rp_id;
+ cid = arg_fido2_cid;
+ cid_size = arg_fido2_cid_size;
+
+ /* For now and for compatibility, if the user explicitly configured FIDO2 support and we do
+ * not read FIDO2 metadata off the LUKS2 header, default to the systemd 248 logic, where we
+ * use PIN + UP when needed, and do not configure UV at all. Eventually, we should make this
+ * explicitly configurable. */
+ required = FIDO2ENROLL_PIN_IF_NEEDED | FIDO2ENROLL_UP_IF_NEEDED | FIDO2ENROLL_UV_OMIT;
+ }
+
+ friendly = friendly_disk_name(crypt_get_device_name(cd), name);
+ if (!friendly)
+ return log_oom();
+
+ for (;;) {
+ if (use_libcryptsetup_plugin && !arg_fido2_cid) {
+ r = attach_luks2_by_fido2_via_plugin(cd, name, until, arg_headless, arg_fido2_device, flags);
+ if (IN_SET(r, -ENOTUNIQ, -ENXIO, -ENOENT))
+ return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "Automatic FIDO2 metadata discovery was not possible because missing or not unique, falling back to traditional unlocking.");
+
+ } else {
+ if (cid)
+ r = acquire_fido2_key(
+ name,
+ friendly,
+ arg_fido2_device,
+ rp_id,
+ cid, cid_size,
+ key_file, arg_keyfile_size, arg_keyfile_offset,
+ key_data, key_data_size,
+ until,
+ arg_headless,
+ required,
+ &decrypted_key, &decrypted_key_size,
+ arg_ask_password_flags);
+ else
+ r = acquire_fido2_key_auto(
+ cd,
+ name,
+ friendly,
+ arg_fido2_device,
+ until,
+ arg_headless,
+ &decrypted_key, &decrypted_key_size,
+ arg_ask_password_flags);
+ if (r >= 0)
+ break;
+ }
+
+ if (r != -EAGAIN) /* EAGAIN means: token not found */
+ return r;
+
+ if (!monitor) {
+ /* We didn't find the token. In this case, watch for it via udev. Let's
+ * create an event loop and monitor first. */
+
+ assert(!event);
+
+ r = make_security_device_monitor(&event, &monitor);
+ if (r < 0)
+ return r;
+
+ log_notice("Security token not present for unlocking volume %s, please plug it in.", friendly);
+
+ /* Let's immediately rescan in case the token appeared in the time we needed
+ * to create and configure the monitor */
+ continue;
+ }
+
+ r = run_security_device_monitor(event, monitor);
+ if (r < 0)
+ return r;
+
+ log_debug("Got one or more potentially relevant udev events, rescanning FIDO2...");
+ }
+
+ if (pass_volume_key)
+ r = measured_crypt_activate_by_volume_key(cd, name, decrypted_key, decrypted_key_size, flags);
+ else {
+ _cleanup_(erase_and_freep) char *base64_encoded = NULL;
+ ssize_t base64_encoded_size;
+
+ /* Before using this key as passphrase we base64 encode it, for compat with homed */
+
+ base64_encoded_size = base64mem(decrypted_key, decrypted_key_size, &base64_encoded);
+ if (base64_encoded_size < 0)
+ return log_oom();
+
+ r = measured_crypt_activate_by_passphrase(cd, name, keyslot, base64_encoded, base64_encoded_size, flags);
+ }
+ if (r == -EPERM) {
+ log_error_errno(r, "Failed to activate with FIDO2 decrypted key. (Key incorrect?)");
+ return -EAGAIN; /* log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate with FIDO2 acquired key: %m");
+
+ return 0;
+}
+
+static int attach_luks2_by_pkcs11_via_plugin(
+ struct crypt_device *cd,
+ const char *name,
+ const char *friendly_name,
+ usec_t until,
+ bool headless,
+ uint32_t flags) {
+
+#if HAVE_LIBCRYPTSETUP_PLUGINS
+ int r;
+
+ if (!streq_ptr(crypt_get_type(cd), CRYPT_LUKS2))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Automatic PKCS#11 metadata requires LUKS2 device.");
+
+ systemd_pkcs11_plugin_params params = {
+ .friendly_name = friendly_name,
+ .until = until,
+ .headless = headless,
+ .askpw_flags = arg_ask_password_flags,
+ };
+
+ r = crypt_activate_by_token_pin(cd, name, "systemd-pkcs11", CRYPT_ANY_TOKEN, NULL, 0, &params, flags);
+ if (r > 0) /* returns unlocked keyslot id on success */
+ r = 0;
+
+ return r;
+#else
+ return -EOPNOTSUPP;
+#endif
+}
+
+static int attach_luks_or_plain_or_bitlk_by_pkcs11(
+ struct crypt_device *cd,
+ const char *name,
+ const char *key_file,
+ const void *key_data,
+ size_t key_data_size,
+ usec_t until,
+ uint32_t flags,
+ bool pass_volume_key) {
+
+ _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL;
+ _cleanup_free_ char *friendly = NULL, *discovered_uri = NULL;
+ size_t decrypted_key_size = 0, discovered_key_size = 0;
+ _cleanup_(erase_and_freep) void *decrypted_key = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ _cleanup_free_ void *discovered_key = NULL;
+ int keyslot = arg_key_slot, r;
+ const char *uri = NULL;
+ bool use_libcryptsetup_plugin = libcryptsetup_plugins_support();
+
+ assert(cd);
+ assert(name);
+ assert(arg_pkcs11_uri || arg_pkcs11_uri_auto);
+
+ if (arg_pkcs11_uri_auto) {
+ if (!use_libcryptsetup_plugin) {
+ r = find_pkcs11_auto_data(cd, &discovered_uri, &discovered_key, &discovered_key_size, &keyslot);
+ if (IN_SET(r, -ENOTUNIQ, -ENXIO))
+ return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "Automatic PKCS#11 metadata discovery was not possible because missing or not unique, falling back to traditional unlocking.");
+ if (r < 0)
+ return r;
+
+ uri = discovered_uri;
+ key_data = discovered_key;
+ key_data_size = discovered_key_size;
+ }
+ } else {
+ uri = arg_pkcs11_uri;
+
+ if (!key_file && !key_data)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "PKCS#11 mode selected but no key file specified, refusing.");
+ }
+
+ friendly = friendly_disk_name(crypt_get_device_name(cd), name);
+ if (!friendly)
+ return log_oom();
+
+ for (;;) {
+ if (use_libcryptsetup_plugin && arg_pkcs11_uri_auto)
+ r = attach_luks2_by_pkcs11_via_plugin(cd, name, friendly, until, arg_headless, flags);
+ else {
+ r = decrypt_pkcs11_key(
+ name,
+ friendly,
+ uri,
+ key_file, arg_keyfile_size, arg_keyfile_offset,
+ key_data, key_data_size,
+ until,
+ arg_headless,
+ &decrypted_key, &decrypted_key_size);
+ if (r >= 0)
+ break;
+ }
+
+ if (r != -EAGAIN) /* EAGAIN means: token not found */
+ return r;
+
+ if (!monitor) {
+ /* We didn't find the token. In this case, watch for it via udev. Let's
+ * create an event loop and monitor first. */
+
+ assert(!event);
+
+ r = make_security_device_monitor(&event, &monitor);
+ if (r < 0)
+ return r;
+
+ log_notice("Security token%s%s not present for unlocking volume %s, please plug it in.",
+ uri ? " " : "", strempty(uri), friendly);
+
+ /* Let's immediately rescan in case the token appeared in the time we needed
+ * to create and configure the monitor */
+ continue;
+ }
+
+ r = run_security_device_monitor(event, monitor);
+ if (r < 0)
+ return r;
+
+ log_debug("Got one or more potentially relevant udev events, rescanning PKCS#11...");
+ }
+ assert(decrypted_key);
+
+ if (pass_volume_key)
+ r = measured_crypt_activate_by_volume_key(cd, name, decrypted_key, decrypted_key_size, flags);
+ else {
+ _cleanup_(erase_and_freep) char *base64_encoded = NULL;
+ ssize_t base64_encoded_size;
+
+ /* Before using this key as passphrase we base64 encode it. Why? For compatibility
+ * with homed's PKCS#11 hookup: there we want to use the key we acquired through
+ * PKCS#11 for other authentication/decryption mechanisms too, and some of them do
+ * not take arbitrary binary blobs, but require NUL-terminated strings — most
+ * importantly UNIX password hashes. Hence, for compatibility we want to use a string
+ * without embedded NUL here too, and that's easiest to generate from a binary blob
+ * via base64 encoding. */
+
+ base64_encoded_size = base64mem(decrypted_key, decrypted_key_size, &base64_encoded);
+ if (base64_encoded_size < 0)
+ return log_oom();
+
+ r = measured_crypt_activate_by_passphrase(cd, name, keyslot, base64_encoded, base64_encoded_size, flags);
+ }
+ if (r == -EPERM) {
+ log_error_errno(r, "Failed to activate with PKCS#11 decrypted key. (Key incorrect?)");
+ return -EAGAIN; /* log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate with PKCS#11 acquired key: %m");
+
+ return 0;
+}
+
+static int make_tpm2_device_monitor(
+ sd_event **ret_event,
+ sd_device_monitor **ret_monitor) {
+
+ _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ int r;
+
+ assert(ret_event);
+ assert(ret_monitor);
+
+ r = sd_event_default(&event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate event loop: %m");
+
+ r = sd_event_add_time_relative(event, NULL, CLOCK_MONOTONIC, arg_token_timeout_usec, USEC_PER_SEC, NULL, INT_TO_PTR(-ETIMEDOUT));
+ if (r < 0)
+ return log_error_errno(r, "Failed to install timeout event source: %m");
+
+ r = sd_device_monitor_new(&monitor);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate device monitor: %m");
+
+ (void) sd_device_monitor_set_description(monitor, "tpmrm");
+
+ r = sd_device_monitor_filter_add_match_subsystem_devtype(monitor, "tpmrm", NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to configure device monitor: %m");
+
+ r = sd_device_monitor_attach_event(monitor, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to attach device monitor: %m");
+
+ r = sd_device_monitor_start(monitor, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start device monitor: %m");
+
+ *ret_event = TAKE_PTR(event);
+ *ret_monitor = TAKE_PTR(monitor);
+ return 0;
+}
+
+static bool use_token_plugins(void) {
+ int r;
+
+ /* Disable tokens if we shall measure, since we won't get access to the volume key then. */
+ if (arg_tpm2_measure_pcr != UINT_MAX)
+ return false;
+
+ r = getenv_bool("SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE");
+ if (r < 0 && r != -ENXIO)
+ log_debug_errno(r, "Failed to parse $SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE value, ignoring: %m");
+
+ return r != 0;
+}
+
+static int attach_luks2_by_tpm2_via_plugin(
+ struct crypt_device *cd,
+ const char *name,
+ usec_t until,
+ bool headless,
+ uint32_t flags) {
+
+#if HAVE_LIBCRYPTSETUP_PLUGINS
+ systemd_tpm2_plugin_params params = {
+ .search_pcr_mask = arg_tpm2_pcr_mask,
+ .device = arg_tpm2_device,
+ .signature_path = arg_tpm2_signature,
+ .pcrlock_path = arg_tpm2_pcrlock,
+ };
+
+ if (!libcryptsetup_plugins_support())
+ return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
+ "Libcryptsetup has external plugins support disabled.");
+
+ return crypt_activate_by_token_pin_ask_password(
+ cd,
+ name,
+ "systemd-tpm2",
+ until,
+ headless,
+ &params,
+ flags,
+ "Please enter TPM2 PIN:",
+ "tpm2-pin",
+ "cryptsetup.tpm2-pin");
+#else
+ return -EOPNOTSUPP;
+#endif
+}
+
+static int attach_luks_or_plain_or_bitlk_by_tpm2(
+ struct crypt_device *cd,
+ const char *name,
+ const char *key_file,
+ const void *key_data,
+ size_t key_data_size,
+ usec_t until,
+ uint32_t flags,
+ bool pass_volume_key) {
+
+ _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL;
+ _cleanup_(erase_and_freep) void *decrypted_key = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ _cleanup_free_ char *friendly = NULL;
+ int keyslot = arg_key_slot, r;
+ size_t decrypted_key_size;
+
+ assert(cd);
+ assert(name);
+ assert(arg_tpm2_device || arg_tpm2_device_auto);
+
+ friendly = friendly_disk_name(crypt_get_device_name(cd), name);
+ if (!friendly)
+ return log_oom();
+
+ for (;;) {
+ if (key_file || key_data) {
+ /* If key data is specified, use that */
+
+ r = acquire_tpm2_key(
+ name,
+ arg_tpm2_device,
+ arg_tpm2_pcr_mask == UINT32_MAX ? TPM2_PCR_MASK_DEFAULT : arg_tpm2_pcr_mask,
+ UINT16_MAX,
+ /* pubkey= */ NULL, /* pubkey_size= */ 0,
+ /* pubkey_pcr_mask= */ 0,
+ /* signature_path= */ NULL,
+ /* pcrlock_path= */ NULL,
+ /* primary_alg= */ 0,
+ key_file, arg_keyfile_size, arg_keyfile_offset,
+ key_data, key_data_size,
+ /* policy_hash= */ NULL, /* policy_hash_size= */ 0, /* we don't know the policy hash */
+ /* salt= */ NULL, /* salt_size= */ 0,
+ /* srk_buf= */ NULL, /* srk_buf_size= */ 0,
+ arg_tpm2_pin ? TPM2_FLAGS_USE_PIN : 0,
+ until,
+ arg_headless,
+ arg_ask_password_flags,
+ &decrypted_key, &decrypted_key_size);
+ if (r >= 0)
+ break;
+ if (IN_SET(r, -EACCES, -ENOLCK))
+ return log_error_errno(SYNTHETIC_ERRNO(EAGAIN), "TPM2 PIN unlock failed, falling back to traditional unlocking.");
+ if (ERRNO_IS_NOT_SUPPORTED(r)) /* TPM2 support not compiled in? */
+ return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), "TPM2 support not available, falling back to traditional unlocking.");
+ /* EAGAIN means: no tpm2 chip found */
+ if (r != -EAGAIN) {
+ log_notice_errno(r, "TPM2 operation failed, falling back to traditional unlocking: %m");
+ return -EAGAIN; /* Mangle error code: let's make any form of TPM2 failure non-fatal. */
+ }
+ } else {
+ r = attach_luks2_by_tpm2_via_plugin(cd, name, until, arg_headless, flags);
+ if (r >= 0)
+ return 0;
+ /* EAGAIN means: no tpm2 chip found
+ * EOPNOTSUPP means: no libcryptsetup plugins support */
+ if (r == -ENXIO)
+ return log_notice_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "No TPM2 metadata matching the current system state found in LUKS2 header, falling back to traditional unlocking.");
+ if (r == -ENOENT)
+ return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "No TPM2 metadata enrolled in LUKS2 header or TPM2 support not available, falling back to traditional unlocking.");
+ if (!IN_SET(r, -EOPNOTSUPP, -EAGAIN)) {
+ log_notice_errno(r, "TPM2 operation failed, falling back to traditional unlocking: %m");
+ return -EAGAIN; /* Mangle error code: let's make any form of TPM2 failure non-fatal. */
+ }
+ }
+
+ if (r == -EOPNOTSUPP) { /* Plugin not available, let's process TPM2 stuff right here instead */
+ _cleanup_free_ void *blob = NULL, *policy_hash = NULL;
+ size_t blob_size, policy_hash_size;
+ bool found_some = false;
+ int token = 0; /* first token to look at */
+
+ /* If no key data is specified, look for it in the header. In order to support
+ * software upgrades we'll iterate through all suitable tokens, maybe one of them
+ * works. */
+
+ for (;;) {
+ _cleanup_free_ void *pubkey = NULL, *salt = NULL, *srk_buf = NULL;
+ size_t pubkey_size = 0, salt_size = 0, srk_buf_size = 0;
+ uint32_t hash_pcr_mask, pubkey_pcr_mask;
+ uint16_t pcr_bank, primary_alg;
+ TPM2Flags tpm2_flags;
+
+ r = find_tpm2_auto_data(
+ cd,
+ arg_tpm2_pcr_mask, /* if != UINT32_MAX we'll only look for tokens with this PCR mask */
+ token, /* search for the token with this index, or any later index than this */
+ &hash_pcr_mask,
+ &pcr_bank,
+ &pubkey, &pubkey_size,
+ &pubkey_pcr_mask,
+ &primary_alg,
+ &blob, &blob_size,
+ &policy_hash, &policy_hash_size,
+ &salt, &salt_size,
+ &srk_buf, &srk_buf_size,
+ &tpm2_flags,
+ &keyslot,
+ &token);
+ if (r == -ENXIO)
+ /* No further TPM2 tokens found in the LUKS2 header. */
+ return log_full_errno(found_some ? LOG_NOTICE : LOG_DEBUG,
+ SYNTHETIC_ERRNO(EAGAIN),
+ found_some
+ ? "No TPM2 metadata matching the current system state found in LUKS2 header, falling back to traditional unlocking."
+ : "No TPM2 metadata enrolled in LUKS2 header, falling back to traditional unlocking.");
+ if (ERRNO_IS_NEG_NOT_SUPPORTED(r))
+ /* TPM2 support not compiled in? */
+ return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "TPM2 support not available, falling back to traditional unlocking.");
+ if (r < 0)
+ return r;
+
+ found_some = true;
+
+ r = acquire_tpm2_key(
+ name,
+ arg_tpm2_device,
+ hash_pcr_mask,
+ pcr_bank,
+ pubkey, pubkey_size,
+ pubkey_pcr_mask,
+ arg_tpm2_signature,
+ arg_tpm2_pcrlock,
+ primary_alg,
+ /* key_file= */ NULL, /* key_file_size= */ 0, /* key_file_offset= */ 0, /* no key file */
+ blob, blob_size,
+ policy_hash, policy_hash_size,
+ salt, salt_size,
+ srk_buf, srk_buf_size,
+ tpm2_flags,
+ until,
+ arg_headless,
+ arg_ask_password_flags,
+ &decrypted_key, &decrypted_key_size);
+ if (IN_SET(r, -EACCES, -ENOLCK))
+ return log_notice_errno(SYNTHETIC_ERRNO(EAGAIN), "TPM2 PIN unlock failed, falling back to traditional unlocking.");
+ if (r != -EPERM)
+ break;
+
+ token++; /* try a different token next time */
+ }
+
+ if (r >= 0)
+ break;
+ /* EAGAIN means: no tpm2 chip found */
+ if (r != -EAGAIN) {
+ log_notice_errno(r, "TPM2 operation failed, falling back to traditional unlocking: %m");
+ return -EAGAIN; /* Mangle error code: let's make any form of TPM2 failure non-fatal. */
+ }
+ }
+
+ if (!monitor) {
+ /* We didn't find the TPM2 device. In this case, watch for it via udev. Let's create
+ * an event loop and monitor first. */
+
+ assert(!event);
+
+ if (is_efi_boot() && !efi_has_tpm2())
+ return log_notice_errno(SYNTHETIC_ERRNO(EAGAIN),
+ "No TPM2 hardware discovered and EFI firmware does not see it either, falling back to traditional unlocking.");
+
+ r = make_tpm2_device_monitor(&event, &monitor);
+ if (r < 0)
+ return r;
+
+ log_info("TPM2 device not present for unlocking %s, waiting for it to become available.", friendly);
+
+ /* Let's immediately rescan in case the device appeared in the time we needed
+ * to create and configure the monitor */
+ continue;
+ }
+
+ r = run_security_device_monitor(event, monitor);
+ if (r < 0)
+ return r;
+
+ log_debug("Got one or more potentially relevant udev events, rescanning for TPM2...");
+ }
+ assert(decrypted_key);
+
+ if (pass_volume_key)
+ r = measured_crypt_activate_by_volume_key(cd, name, decrypted_key, decrypted_key_size, flags);
+ else {
+ _cleanup_(erase_and_freep) char *base64_encoded = NULL;
+ ssize_t base64_encoded_size;
+
+ /* Before using this key as passphrase we base64 encode it, for compat with homed */
+
+ base64_encoded_size = base64mem(decrypted_key, decrypted_key_size, &base64_encoded);
+ if (base64_encoded_size < 0)
+ return log_oom();
+
+ r = measured_crypt_activate_by_passphrase(cd, name, keyslot, base64_encoded, base64_encoded_size, flags);
+ }
+ if (r == -EPERM) {
+ log_error_errno(r, "Failed to activate with TPM2 decrypted key. (Key incorrect?)");
+ return -EAGAIN; /* log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate with TPM2 acquired key: %m");
+
+ return 0;
+}
+
+static int attach_luks_or_plain_or_bitlk_by_key_data(
+ struct crypt_device *cd,
+ const char *name,
+ const void *key_data,
+ size_t key_data_size,
+ uint32_t flags,
+ bool pass_volume_key) {
+
+ int r;
+
+ assert(cd);
+ assert(name);
+ assert(key_data);
+
+ if (pass_volume_key)
+ r = measured_crypt_activate_by_volume_key(cd, name, key_data, key_data_size, flags);
+ else
+ r = measured_crypt_activate_by_passphrase(cd, name, arg_key_slot, key_data, key_data_size, flags);
+ if (r == -EPERM) {
+ log_error_errno(r, "Failed to activate. (Key incorrect?)");
+ return -EAGAIN; /* Log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate: %m");
+
+ return 0;
+}
+
+static int attach_luks_or_plain_or_bitlk_by_key_file(
+ struct crypt_device *cd,
+ const char *name,
+ const char *key_file,
+ uint32_t flags,
+ bool pass_volume_key) {
+
+ _cleanup_(erase_and_freep) char *kfdata = NULL;
+ _cleanup_free_ char *bindname = NULL;
+ size_t kfsize;
+ int r;
+
+ assert(cd);
+ assert(name);
+ assert(key_file);
+
+ /* If we read the key via AF_UNIX, make this client recognizable */
+ bindname = make_bindname(name);
+ if (!bindname)
+ return log_oom();
+
+ r = read_full_file_full(
+ AT_FDCWD, key_file,
+ arg_keyfile_offset == 0 ? UINT64_MAX : arg_keyfile_offset,
+ arg_keyfile_size == 0 ? SIZE_MAX : arg_keyfile_size,
+ READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET,
+ bindname,
+ &kfdata, &kfsize);
+ if (r == -E2BIG) {
+ log_error_errno(r, "Failed to activate, key file '%s' too large.", key_file);
+ return -EAGAIN;
+ }
+ if (r == -ENOENT) {
+ log_error_errno(r, "Failed to activate, key file '%s' missing.", key_file);
+ return -EAGAIN; /* Log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to read key file '%s': %m", key_file);
+
+ if (pass_volume_key)
+ r = measured_crypt_activate_by_volume_key(cd, name, kfdata, kfsize, flags);
+ else
+ r = measured_crypt_activate_by_passphrase(cd, name, arg_key_slot, kfdata, kfsize, flags);
+ if (r == -EPERM) {
+ log_error_errno(r, "Failed to activate with key file '%s'. (Key data incorrect?)", key_file);
+ return -EAGAIN; /* Log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate with key file '%s': %m", key_file);
+
+ return 0;
+}
+
+static int attach_luks_or_plain_or_bitlk_by_passphrase(
+ struct crypt_device *cd,
+ const char *name,
+ char **passwords,
+ uint32_t flags,
+ bool pass_volume_key) {
+
+ int r;
+
+ assert(cd);
+ assert(name);
+
+ r = -EINVAL;
+ STRV_FOREACH(p, passwords) {
+ if (pass_volume_key)
+ r = measured_crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags);
+ else
+ r = measured_crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags);
+ if (r >= 0)
+ break;
+ }
+ if (r == -EPERM) {
+ log_error_errno(r, "Failed to activate with specified passphrase. (Passphrase incorrect?)");
+ return -EAGAIN; /* log actual error, but return EAGAIN */
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to activate with specified passphrase: %m");
+
+ return 0;
+}
+
+static int attach_luks_or_plain_or_bitlk(
+ struct crypt_device *cd,
+ const char *name,
+ const char *key_file,
+ const void *key_data,
+ size_t key_data_size,
+ char **passwords,
+ uint32_t flags,
+ usec_t until) {
+
+ bool pass_volume_key = false;
+ int r;
+
+ assert(cd);
+ assert(name);
+
+ if ((!arg_type && !crypt_get_type(cd)) || streq_ptr(arg_type, CRYPT_PLAIN)) {
+ struct crypt_params_plain params = {
+ .offset = arg_offset,
+ .skip = arg_skip,
+ .sector_size = arg_sector_size,
+ };
+ const char *cipher, *cipher_mode;
+ _cleanup_free_ char *truncated_cipher = NULL;
+
+ if (streq_ptr(arg_hash, "plain"))
+ /* plain isn't a real hash type. it just means "use no hash" */
+ params.hash = NULL;
+ else if (arg_hash)
+ 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_format() 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, &params);
+ if (r < 0)
+ return log_error_errno(r, "Loading of cryptographic parameters failed: %m");
+
+ /* hash == NULL implies the user passed "plain" */
+ pass_volume_key = !params.hash;
+ }
+
+ 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 (arg_tpm2_device || arg_tpm2_device_auto)
+ return attach_luks_or_plain_or_bitlk_by_tpm2(cd, name, key_file, key_data, key_data_size, until, flags, pass_volume_key);
+ if (arg_fido2_device || arg_fido2_device_auto)
+ return attach_luks_or_plain_or_bitlk_by_fido2(cd, name, key_file, key_data, key_data_size, until, flags, pass_volume_key);
+ if (arg_pkcs11_uri || arg_pkcs11_uri_auto)
+ return attach_luks_or_plain_or_bitlk_by_pkcs11(cd, name, key_file, key_data, key_data_size, until, flags, pass_volume_key);
+ if (key_data)
+ return attach_luks_or_plain_or_bitlk_by_key_data(cd, name, key_data, key_data_size, flags, pass_volume_key);
+ if (key_file)
+ return attach_luks_or_plain_or_bitlk_by_key_file(cd, name, key_file, flags, pass_volume_key);
+
+ return attach_luks_or_plain_or_bitlk_by_passphrase(cd, name, passwords, flags, pass_volume_key);
+}
+
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-cryptsetup", "8", &link);
+ if (r < 0)
+ return log_oom();
+
+ printf("%1$s attach VOLUME SOURCE-DEVICE [KEY-FILE] [CONFIG]\n"
+ "%1$s detach VOLUME\n\n"
+ "%2$sAttach or detach an encrypted block device.%3$s\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ "\nSee the %4$s for details.\n",
+ program_invocation_short_name,
+ ansi_highlight(),
+ ansi_normal(),
+ link);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+ enum {
+ ARG_VERSION = 0x100,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ if (argv_looks_like_help(argc, argv))
+ return help();
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+ switch (c) {
+
+ case 'h':
+ return help();
+
+ case ARG_VERSION:
+ return version();
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached();
+ }
+
+ return 1;
+}
+
+static uint32_t determine_flags(void) {
+ uint32_t flags = 0;
+
+ if (arg_readonly)
+ flags |= CRYPT_ACTIVATE_READONLY;
+
+ if (arg_discards)
+ flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
+
+ if (arg_same_cpu_crypt)
+ flags |= CRYPT_ACTIVATE_SAME_CPU_CRYPT;
+
+ if (arg_submit_from_crypt_cpus)
+ flags |= CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS;
+
+ if (arg_no_read_workqueue)
+ flags |= CRYPT_ACTIVATE_NO_READ_WORKQUEUE;
+
+ if (arg_no_write_workqueue)
+ flags |= CRYPT_ACTIVATE_NO_WRITE_WORKQUEUE;
+
+#ifdef CRYPT_ACTIVATE_SERIALIZE_MEMORY_HARD_PBKDF
+ /* Try to decrease the risk of OOM event if memory hard key derivation function is in use */
+ /* https://gitlab.com/cryptsetup/cryptsetup/issues/446/ */
+ flags |= CRYPT_ACTIVATE_SERIALIZE_MEMORY_HARD_PBKDF;
+#endif
+
+ return flags;
+}
+
+static void remove_and_erasep(const char **p) {
+ int r;
+
+ if (!*p)
+ return;
+
+ r = unlinkat_deallocate(AT_FDCWD, *p, UNLINK_ERASE);
+ if (r < 0 && r != -ENOENT)
+ log_warning_errno(r, "Unable to erase key file '%s', ignoring: %m", *p);
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(crypt_freep) struct crypt_device *cd = NULL;
+ const char *verb;
+ int r;
+
+ log_setup();
+
+ umask(0022);
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
+
+ cryptsetup_enable_logging(NULL);
+
+ if (argc - optind < 2)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "This program requires at least two arguments.");
+ verb = ASSERT_PTR(argv[optind]);
+
+ if (streq(verb, "attach")) {
+ _unused_ _cleanup_(remove_and_erasep) const char *destroy_key_file = NULL;
+ _cleanup_(erase_and_freep) void *key_data = NULL;
+ crypt_status_info status;
+ size_t key_data_size = 0;
+ uint32_t flags = 0;
+ unsigned tries;
+ usec_t until;
+ PassphraseType passphrase_type = PASSPHRASE_NONE;
+
+ /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [KEY-FILE] [CONFIG] */
+
+ if (argc - optind < 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach requires at least two arguments.");
+ if (argc - optind >= 6)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach does not accept more than four arguments.");
+
+ const char *volume = ASSERT_PTR(argv[optind + 1]),
+ *source = ASSERT_PTR(argv[optind + 2]),
+ *key_file = argc - optind >= 4 ? mangle_none(argv[optind + 3]) : NULL,
+ *config = argc - optind >= 5 ? mangle_none(argv[optind + 4]) : NULL;
+
+ if (!filename_is_valid(volume))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Volume name '%s' is not valid.", volume);
+
+ if (key_file && !path_is_absolute(key_file)) {
+ log_warning("Password file path '%s' is not absolute. Ignoring.", key_file);
+ key_file = NULL;
+ }
+
+ if (config) {
+ r = parse_crypt_config(config);
+ if (r < 0)
+ return r;
+ }
+
+ log_debug("%s %s ← %s type=%s cipher=%s", __func__,
+ volume, source, strempty(arg_type), strempty(arg_cipher));
+
+ /* A delicious drop of snake oil */
+ (void) mlockall(MCL_FUTURE);
+
+ if (!key_file) {
+ _cleanup_free_ char *bindname = NULL;
+ const char *fn;
+
+ bindname = make_bindname(volume);
+ if (!bindname)
+ return log_oom();
+
+ /* If a key file is not explicitly specified, search for a key in a well defined
+ * search path, and load it. */
+
+ fn = strjoina(volume, ".key");
+ r = find_key_file(
+ fn,
+ STRV_MAKE("/etc/cryptsetup-keys.d", "/run/cryptsetup-keys.d"),
+ bindname,
+ &key_data, &key_data_size);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ log_debug("Automatically discovered key for volume '%s'.", volume);
+ } else if (arg_keyfile_erase)
+ destroy_key_file = key_file; /* let's get this baby erased when we leave */
+
+ if (arg_header) {
+ if (streq_ptr(arg_type, CRYPT_TCRYPT)){
+ log_debug("tcrypt header: %s", arg_header);
+ r = crypt_init_data_device(&cd, arg_header, source);
+ } else {
+ log_debug("LUKS header: %s", arg_header);
+ r = crypt_init(&cd, arg_header);
+ }
+ } else
+ r = crypt_init(&cd, source);
+ if (r < 0)
+ return log_error_errno(r, "crypt_init() failed: %m");
+
+ cryptsetup_enable_logging(cd);
+
+ status = crypt_status(cd, volume);
+ if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
+ log_info("Volume %s already active.", volume);
+ return 0;
+ }
+
+ flags = determine_flags();
+
+ until = usec_add(now(CLOCK_MONOTONIC), arg_timeout);
+ if (until == USEC_INFINITY)
+ until = 0;
+
+ if (arg_key_size == 0)
+ arg_key_size = 256U / 8U;
+
+ 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);
+ }
+
+ if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2)) {
+ r = crypt_load(cd, !arg_type || streq(arg_type, ANY_LUKS) ? CRYPT_LUKS : arg_type, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to load LUKS superblock on device %s: %m", crypt_get_device_name(cd));
+
+ if (arg_header) {
+ r = crypt_set_data_device(cd, source);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set LUKS data device %s: %m", source);
+ }
+
+ /* Tokens are available in LUKS2 only, but it is ok to call (and fail) with LUKS1. */
+ if (!key_file && !key_data && use_token_plugins()) {
+ r = crypt_activate_by_token_pin_ask_password(
+ cd,
+ volume,
+ /* type= */ NULL,
+ until,
+ arg_headless,
+ /* userdata= */ NULL,
+ flags,
+ "Please enter LUKS2 token PIN:",
+ "luks2-pin",
+ "cryptsetup.luks2-pin");
+ if (r >= 0) {
+ log_debug("Volume %s activated with LUKS token id %i.", volume, r);
+ return 0;
+ }
+
+ log_debug_errno(r, "Token activation unsuccessful for device %s: %m", crypt_get_device_name(cd));
+ }
+ }
+
+/* since cryptsetup 2.3.0 (Feb 2020) */
+#ifdef CRYPT_BITLK
+ if (streq_ptr(arg_type, CRYPT_BITLK)) {
+ r = crypt_load(cd, CRYPT_BITLK, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to load Bitlocker superblock on device %s: %m", crypt_get_device_name(cd));
+ }
+#endif
+
+ for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) {
+ _cleanup_strv_free_erase_ char **passwords = NULL;
+
+ /* When we were able to acquire multiple keys, let's always process them in this order:
+ *
+ * 1. A key acquired via PKCS#11 or FIDO2 token, or TPM2 chip
+ * 2. The discovered key: i.e. key_data + key_data_size
+ * 3. The configured key: i.e. key_file + arg_keyfile_offset + arg_keyfile_size
+ * 4. The empty password, in case arg_try_empty_password is set
+ * 5. We enquire the user for a password
+ */
+
+ if (!key_file && !key_data && !arg_pkcs11_uri && !arg_pkcs11_uri_auto && !arg_fido2_device && !arg_fido2_device_auto && !arg_tpm2_device && !arg_tpm2_device_auto) {
+
+ if (arg_try_empty_password) {
+ /* Hmm, let's try an empty password now, but only once */
+ arg_try_empty_password = false;
+
+ key_data = strdup("");
+ if (!key_data)
+ return log_oom();
+
+ key_data_size = 0;
+ } else {
+ /* Ask the user for a passphrase or recovery key only as last resort, if we have
+ * nothing else to check for */
+ if (passphrase_type == PASSPHRASE_NONE) {
+ passphrase_type = check_registered_passwords(cd);
+ if (passphrase_type == PASSPHRASE_NONE)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No passphrase or recovery key registered.");
+ }
+
+ r = get_password(volume, source, until, tries == 0 && !arg_verify, passphrase_type, &passwords);
+ if (r == -EAGAIN)
+ continue;
+ if (r < 0)
+ return r;
+ }
+ }
+
+ if (streq_ptr(arg_type, CRYPT_TCRYPT))
+ r = attach_tcrypt(cd, volume, key_file, key_data, key_data_size, passwords, flags);
+ else
+ r = attach_luks_or_plain_or_bitlk(cd, volume, key_file, key_data, key_data_size, passwords, flags, until);
+ if (r >= 0)
+ break;
+ if (r != -EAGAIN)
+ return r;
+
+ /* Key not correct? Let's try again! */
+
+ key_file = NULL;
+ key_data = erase_and_free(key_data);
+ key_data_size = 0;
+ arg_pkcs11_uri = mfree(arg_pkcs11_uri);
+ arg_pkcs11_uri_auto = false;
+ arg_fido2_device = mfree(arg_fido2_device);
+ arg_fido2_device_auto = false;
+ arg_tpm2_device = mfree(arg_tpm2_device);
+ arg_tpm2_device_auto = false;
+ }
+
+ if (arg_tries != 0 && tries >= arg_tries)
+ return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to activate; giving up.");
+
+ } else if (streq(verb, "detach")) {
+ const char *volume = ASSERT_PTR(argv[optind + 1]);
+
+ if (argc - optind >= 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach does not accept more than one argument.");
+
+ if (!filename_is_valid(volume))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Volume name '%s' is not valid.", volume);
+
+ r = crypt_init_by_name(&cd, volume);
+ if (r == -ENODEV) {
+ log_info("Volume %s already inactive.", volume);
+ return 0;
+ }
+ if (r < 0)
+ return log_error_errno(r, "crypt_init_by_name() for volume '%s' failed: %m", volume);
+
+ cryptsetup_enable_logging(cd);
+
+ r = crypt_deactivate(cd, volume);
+ if (r < 0)
+ return log_error_errno(r, "Failed to deactivate '%s': %m", volume);
+
+ } else
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb %s.", verb);
+
+ return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-24 10:27:23 +0000