Adding upstream version 241.upstream/241upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 1354 insertions, 0 deletions

diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c
new file mode 100644
index 0000000..8759a26
--- /dev/null
+++ b/src/cryptsetup/cryptsetup-generator.c
@@ -0,0 +1,609 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <stdio_ext.h>
+
+#include "alloc-util.h"
+#include "dropin.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fstab-util.h"
+#include "generator.h"
+#include "hashmap.h"
+#include "id128-util.h"
+#include "log.h"
+#include "mkdir.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "proc-cmdline.h"
+#include "specifier.h"
+#include "string-util.h"
+#include "strv.h"
+#include "unit-name.h"
+#include "util.h"
+
+typedef struct crypto_device {
+        char *uuid;
+        char *keyfile;
+        char *keydev;
+        char *name;
+        char *options;
+        bool create;
+} crypto_device;
+
+static const char *arg_dest = NULL;
+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_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep);
+
+static int generate_keydev_mount(const char *name, const char *keydev, char **unit, char **mount) {
+        _cleanup_free_ char *u = NULL, *what = NULL, *where = NULL, *name_escaped = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        int r;
+
+        assert(name);
+        assert(keydev);
+        assert(unit);
+        assert(mount);
+
+        r = mkdir_parents("/run/systemd/cryptsetup", 0755);
+        if (r < 0)
+                return r;
+
+        r = mkdir("/run/systemd/cryptsetup", 0700);
+        if (r < 0 && errno != EEXIST)
+                return -errno;
+
+        name_escaped = cescape(name);
+        if (!name_escaped)
+                return -ENOMEM;
+
+        where = strjoin("/run/systemd/cryptsetup/keydev-", name_escaped);
+        if (!where)
+                return -ENOMEM;
+
+        r = mkdir(where, 0700);
+        if (r < 0 && errno != EEXIST)
+                return -errno;
+
+        r = unit_name_from_path(where, ".mount", &u);
+        if (r < 0)
+                return r;
+
+        r = generator_open_unit_file(arg_dest, NULL, u, &f);
+        if (r < 0)
+                return r;
+
+        what = fstab_node_to_udev_node(keydev);
+        if (!what)
+                return -ENOMEM;
+
+        fprintf(f,
+                "[Unit]\n"
+                "DefaultDependencies=no\n\n"
+                "[Mount]\n"
+                "What=%s\n"
+                "Where=%s\n"
+                "Options=ro\n", what, where);
+
+        r = fflush_and_check(f);
+        if (r < 0)
+                return r;
+
+        *unit = TAKE_PTR(u);
+        *mount = TAKE_PTR(where);
+
+        return 0;
+}
+
+static int create_disk(
+                const char *name,
+                const char *device,
+                const char *keydev,
+                const char *password,
+                const char *options) {
+
+        _cleanup_free_ char *n = NULL, *d = NULL, *u = NULL, *e = NULL,
+                *filtered = NULL, *u_escaped = NULL, *password_escaped = NULL, *filtered_escaped = NULL, *name_escaped = NULL, *keydev_mount = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        const char *dmname;
+        bool noauto, nofail, tmp, swap, netdev;
+        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");
+        netdev = fstab_test_option(options, "_netdev\0");
+
+        if (tmp && swap)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.",
+                                       name);
+
+        name_escaped = specifier_escape(name);
+        if (!name_escaped)
+                return log_oom();
+
+        e = unit_name_escape(name);
+        if (!e)
+                return log_oom();
+
+        u = fstab_node_to_udev_node(device);
+        if (!u)
+                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");
+
+        u_escaped = specifier_escape(u);
+        if (!u_escaped)
+                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");
+
+        if (password) {
+                password_escaped = specifier_escape(password);
+                if (!password_escaped)
+                        return log_oom();
+        }
+
+        if (keydev && !password)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "Key device is specified, but path to the password file is missing.");
+
+        r = generator_open_unit_file(arg_dest, NULL, n, &f);
+        if (r < 0)
+                return r;
+
+        fprintf(f,
+                "[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"
+                "IgnoreOnIsolate=true\n"
+                "After=%s\n",
+                netdev ? "remote-fs-pre.target" : "cryptsetup-pre.target");
+
+        if (keydev) {
+                _cleanup_free_ char *unit = NULL, *p = NULL;
+
+                r = generate_keydev_mount(name, keydev, &unit, &keydev_mount);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to generate keydev mount unit: %m");
+
+                p = prefix_root(keydev_mount, password_escaped);
+                if (!p)
+                        return log_oom();
+
+                free_and_replace(password_escaped, p);
+        }
+
+        if (!nofail)
+                fprintf(f,
+                        "Before=%s\n",
+                        netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
+
+        if (password) {
+                if (PATH_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
+                        fputs("After=systemd-random-seed.service\n", f);
+                else if (!STR_IN_SET(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 (path_startswith(uu, "/dev/")) {
+                                        _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_escaped);
+                        }
+                }
+        }
+
+        if (path_startswith(u, "/dev/")) {
+                fprintf(f,
+                        "BindsTo=%s\n"
+                        "After=%s\n"
+                        "Before=umount.target\n",
+                        d, d);
+
+                if (swap)
+                        fputs("Before=dev-mapper-%i.swap\n",
+                              f);
+        } else
+                /* For loopback devices, add systemd-tmpfiles-setup-dev.service
+                   dependency to ensure that loopback support is available in
+                   the kernel (/dev/loop-control needs to exist) */
+                fprintf(f,
+                        "RequiresMountsFor=%s\n"
+                        "Requires=systemd-tmpfiles-setup-dev.service\n"
+                        "After=systemd-tmpfiles-setup-dev.service\n",
+                        u_escaped);
+
+        r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
+        if (r < 0)
+                return r;
+
+        if (filtered) {
+                filtered_escaped = specifier_escape(filtered);
+                if (!filtered_escaped)
+                        return log_oom();
+        }
+
+        fprintf(f,
+                "\n[Service]\n"
+                "Type=oneshot\n"
+                "RemainAfterExit=yes\n"
+                "TimeoutSec=0\n" /* the binary handles timeouts anyway */
+                "KeyringMode=shared\n" /* make sure we can share cached keys among instances */
+                "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
+                "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
+                name_escaped, u_escaped, strempty(password_escaped), strempty(filtered_escaped),
+                name_escaped);
+
+        if (tmp)
+                fprintf(f,
+                        "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
+                        name_escaped);
+
+        if (swap)
+                fprintf(f,
+                        "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
+                        name_escaped);
+
+        if (keydev)
+                fprintf(f,
+                        "ExecStartPost=" UMOUNT_PATH " %s\n\n",
+                        keydev_mount);
+
+        r = fflush_and_check(f);
+        if (r < 0)
+                return log_error_errno(r, "Failed to write unit file %s: %m", n);
+
+        if (!noauto) {
+                r = generator_add_symlink(arg_dest, d, "wants", n);
+                if (r < 0)
+                        return r;
+
+                r = generator_add_symlink(arg_dest,
+                                          netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
+                                          nofail ? "wants" : "requires", n);
+                if (r < 0)
+                        return r;
+        }
+
+        dmname = strjoina("dev-mapper-", e, ".device");
+        r = generator_add_symlink(arg_dest, dmname, "requires", n);
+        if (r < 0)
+                return r;
+
+        if (!noauto && !nofail) {
+                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 crypto_device* crypt_device_free(crypto_device *d) {
+        if (!d)
+                return NULL;
+
+        free(d->uuid);
+        free(d->keyfile);
+        free(d->keydev);
+        free(d->name);
+        free(d->options);
+        return mfree(d);
+}
+
+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) {
+        _cleanup_free_ char *uuid = NULL, *uuid_value = NULL;
+        crypto_device *d;
+        int r;
+
+        if (streq(key, "luks")) {
+
+                r = value ? parse_boolean(value) : 1;
+                if (r < 0)
+                        log_warning("Failed to parse luks= kernel command line switch %s. Ignoring.", value);
+                else
+                        arg_enabled = r;
+
+        } else if (streq(key, "luks.crypttab")) {
+
+                r = value ? parse_boolean(value) : 1;
+                if (r < 0)
+                        log_warning("Failed to parse luks.crypttab= kernel command line switch %s. Ignoring.", value);
+                else
+                        arg_read_crypttab = r;
+
+        } else if (streq(key, "luks.uuid")) {
+
+                if (proc_cmdline_value_missing(key, value))
+                        return 0;
+
+                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")) {
+
+                if (proc_cmdline_value_missing(key, value))
+                        return 0;
+
+                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_and_replace(d->options, uuid_value);
+                } else if (free_and_strdup(&arg_default_options, value) < 0)
+                        return log_oom();
+
+        } else if (streq(key, "luks.key")) {
+                size_t n;
+                _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
+                char *c;
+                const char *keyspec;
+
+                if (proc_cmdline_value_missing(key, value))
+                        return 0;
+
+                n = strspn(value, LETTERS DIGITS "-");
+                if (value[n] != '=') {
+                        if (free_and_strdup(&arg_default_keyfile, value) < 0)
+                                 return log_oom();
+                        return 0;
+                }
+
+                uuid = strndup(value, n);
+                if (!uuid)
+                        return log_oom();
+
+                if (!id128_is_valid(uuid)) {
+                        log_warning("Failed to parse luks.key= kernel command line switch. UUID is invalid, ignoring.");
+                        return 0;
+                }
+
+                d = get_crypto_device(uuid);
+                if (!d)
+                        return log_oom();
+
+                keyspec = value + n + 1;
+                c = strrchr(keyspec, ':');
+                if (c) {
+                         *c = '\0';
+                        keyfile = strdup(keyspec);
+                        keydev = strdup(c + 1);
+
+                        if (!keyfile || !keydev)
+                                return log_oom();
+                } else {
+                        /* No keydev specified */
+                        keyfile = strdup(keyspec);
+                        if (!keyfile)
+                                return log_oom();
+                }
+
+                free_and_replace(d->keyfile, keyfile);
+                free_and_replace(d->keydev, keydev);
+        } else if (streq(key, "luks.name")) {
+
+                if (proc_cmdline_value_missing(key, value))
+                        return 0;
+
+                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_and_replace(d->name, uuid_value);
+                } else
+                        log_warning("Failed to parse luks name switch %s. Ignoring.", value);
+        }
+
+        return 0;
+}
+
+static int add_crypttab_devices(void) {
+        _cleanup_fclose_ FILE *f = NULL;
+        unsigned crypttab_line = 0;
+        struct stat st;
+        int r;
+
+        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;
+        }
+
+        (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
+
+        if (fstat(fileno(f), &st) < 0) {
+                log_error_errno(errno, "Failed to stat /etc/crypttab: %m");
+                return 0;
+        }
+
+        for (;;) {
+                _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyfile = NULL, *options = NULL;
+                crypto_device *d = NULL;
+                char *l, *uuid;
+                int k;
+
+                r = read_line(f, LONG_LINE_MAX, &line);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to read /etc/crypttab: %m");
+                if (r == 0)
+                        break;
+
+                crypttab_line++;
+
+                l = strstrip(line);
+                if (IN_SET(l[0], 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_SET(device, "UUID=", "luks-");
+                if (!uuid)
+                        uuid = path_startswith(device, "/dev/disk/by-uuid/");
+                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, NULL, 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->keydev, d->keyfile ?: arg_default_keyfile, options);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func,
+                                              crypto_device, crypt_device_free);
+
+static int run(const char *dest, const char *dest_early, const char *dest_late) {
+        int r;
+
+        assert_se(arg_dest = dest);
+
+        arg_disks = hashmap_new(&crypt_device_hash_ops);
+        if (!arg_disks)
+                return log_oom();
+
+        r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
+        if (r < 0)
+                return log_warning_errno(r, "Failed to parse kernel command line: %m");
+
+        if (!arg_enabled)
+                return 0;
+
+        r = add_crypttab_devices();
+        if (r < 0)
+                return r;
+
+        r = add_proc_cmdline_devices();
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+DEFINE_MAIN_GENERATOR_FUNCTION(run);
diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
new file mode 100644
index 0000000..9cb52dd
--- /dev/null
+++ b/src/cryptsetup/cryptsetup.c
@@ -0,0 +1,745 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.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 "crypt-util.h"
+#include "device-util.h"
+#include "escape.h"
+#include "fileio.h"
+#include "log.h"
+#include "main-func.h"
+#include "mount-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "pretty-print.h"
+#include "util.h"
+
+/* internal helper */
+#define ANY_LUKS "LUKS"
+/* as in src/cryptsetup.h */
+#define CRYPT_SECTOR_SIZE 512
+#define CRYPT_MAX_SECTOR_SIZE 4096
+
+static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */
+static char *arg_cipher = NULL;
+static unsigned arg_key_size = 0;
+#if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
+static unsigned arg_sector_size = CRYPT_SECTOR_SIZE;
+#endif
+static int arg_key_slot = CRYPT_ANY_SLOT;
+static unsigned arg_keyfile_size = 0;
+static uint64_t 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;
+#ifdef CRYPT_TCRYPT_VERA_MODES
+static bool arg_tcrypt_veracrypt = false;
+#endif
+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_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);
+
+/* Options Debian's crypttab knows we don't:
+
+    precheck=
+    check=
+    checkargs=
+    noearly=
+    loud=
+    keyscript=
+*/
+
+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"))
+                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_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        return 0;
+                }
+
+                if (arg_key_size % 8) {
+                        log_error("size= not a multiple of 8, ignoring.");
+                        return 0;
+                }
+
+                arg_key_size /= 8;
+
+        } else if ((val = startswith(option, "sector-size="))) {
+
+#if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
+                r = safe_atou(val, &arg_sector_size);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        return 0;
+                }
+
+                if (arg_sector_size % 2) {
+                        log_error("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_error("sector-size= is outside of %u and %u, ignoring.", CRYPT_SECTOR_SIZE, CRYPT_MAX_SECTOR_SIZE);
+                        return 0;
+                }
+#else
+                log_error("sector-size= is not supported, compiled with old libcryptsetup.");
+                return 0;
+#endif
+
+        } else if ((val = startswith(option, "key-slot="))) {
+
+                arg_type = ANY_LUKS;
+                r = safe_atoi(val, &arg_key_slot);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        return 0;
+                }
+
+        } 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_error("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_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        return 0;
+                }
+
+        } else if ((val = startswith(option, "keyfile-offset="))) {
+                uint64_t off;
+
+                r = safe_atou64(val, &off);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        return 0;
+                }
+
+                if ((size_t) off != off) {
+                        /* https://gitlab.com/cryptsetup/cryptsetup/issues/359 */
+                        log_error("keyfile-offset= value would truncated to %zu, ignoring.", (size_t) off);
+                        return 0;
+                }
+
+                arg_keyfile_offset = off;
+
+        } 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="))) {
+                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_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        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 = ANY_LUKS;
+        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
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "This version of cryptsetup does not support tcrypt-veracrypt; refusing.");
+#endif
+        } else if (STR_IN_SET(option, "plain", "swap", "tmp"))
+                arg_type = CRYPT_PLAIN;
+        else if ((val = startswith(option, "timeout="))) {
+
+                r = parse_sec_fix_0(val, &arg_timeout);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+                        return 0;
+                }
+
+        } 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 (!streq(option, "none"))
+                log_warning("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 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;
+        const char *i, *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_devnum(&device, 'b', st.st_rdev) < 0)
+                return NULL;
+
+        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 */
+
+        if (asprintf(&device, "/dev/mapper/%s", label) < 0)
+                return NULL;
+
+        f = setmntent("/etc/fstab", "re");
+        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, *text = NULL, *disk_path = 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);
+
+        disk_path = cescape(src);
+        if (!disk_path)
+                return log_oom();
+
+        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();
+
+        id = strjoina("cryptsetup:", disk_path);
+
+        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:", disk_path);
+
+                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_and_replace(*p, c);
+        }
+
+        *ret = TAKE_PTR(passwords);
+
+        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; /* log with the actual error, but return EAGAIN */
+                }
+
+                params.passphrase = passphrase;
+        } else
+                params.passphrase = passwords[0];
+        params.passphrase_size = strlen(params.passphrase);
+
+        r = crypt_load(cd, CRYPT_TCRYPT, &params);
+        if (r < 0) {
+                if (key_file && r == -EPERM) {
+                        log_error_errno(r, "Failed to activate using password file '%s'. (Key data not correct?)", key_file);
+                        return -EAGAIN; /* log the actual error, but return EAGAIN */
+                }
+
+                return log_error_errno(r, "Failed to load tcrypt superblock on device %s: %m", crypt_get_device_name(cd));
+        }
+
+        r = 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 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 || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) {
+                r = crypt_load(cd, CRYPT_LUKS, NULL);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to load LUKS superblock on device %s: %m", crypt_get_device_name(cd));
+
+                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,
+#if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
+                        .sector_size = arg_sector_size,
+#endif
+                };
+                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, &params);
+
+                /* 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 == -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);
+        } else {
+                char **p;
+
+                r = -EINVAL;
+                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;
+                }
+                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 r;
+}
+
+static int help(void) {
+        _cleanup_free_ char *link = NULL;
+        int r;
+
+        r = terminal_urlify_man("systemd-cryptsetup@.service", "8", &link);
+        if (r < 0)
+                return log_oom();
+
+        printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
+               "%s detach VOLUME\n\n"
+               "Attaches or detaches an encrypted block device.\n"
+               "\nSee the %s for details.\n"
+               , program_invocation_short_name
+               , program_invocation_short_name
+               , link
+        );
+
+        return 0;
+}
+
+static int run(int argc, char *argv[]) {
+        _cleanup_(crypt_freep) struct crypt_device *cd = NULL;
+        int r;
+
+        if (argc <= 1)
+                return help();
+
+        if (argc < 3) {
+                log_error("This program requires at least two arguments.");
+                return -EINVAL;
+        }
+
+        log_setup_service();
+
+        umask(0022);
+
+        if (streq(argv[1], "attach")) {
+                uint32_t flags = 0;
+                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)
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach requires at least two arguments.");
+
+                if (argc >= 5 &&
+                    argv[4][0] &&
+                    !streq(argv[4], "-") &&
+                    !streq(argv[4], "none")) {
+
+                        if (!path_is_absolute(argv[4]))
+                                log_warning("Password file path '%s' is not absolute. Ignoring.", argv[4]);
+                        else
+                                key_file = argv[4];
+                }
+
+                if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) {
+                        r = parse_options(argv[5]);
+                        if (r < 0)
+                                return r;
+                }
+
+                /* A delicious drop of snake oil */
+                mlockall(MCL_FUTURE);
+
+                if (arg_header) {
+                        log_debug("LUKS header: %s", arg_header);
+                        r = crypt_init(&cd, arg_header);
+                } else
+                        r = crypt_init(&cd, argv[3]);
+                if (r < 0)
+                        return log_error_errno(r, "crypt_init() failed: %m");
+
+                crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
+
+                status = crypt_status(cd, argv[2]);
+                if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
+                        log_info("Volume %s already active.", argv[2]);
+                        return 0;
+                }
+
+                if (arg_readonly)
+                        flags |= CRYPT_ACTIVATE_READONLY;
+
+                if (arg_discards)
+                        flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
+
+                if (arg_timeout == USEC_INFINITY)
+                        until = 0;
+                else
+                        until = now(CLOCK_MONOTONIC) + arg_timeout;
+
+                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) {
+                                r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords);
+                                if (r == -EAGAIN)
+                                        continue;
+                                if (r < 0)
+                                        return r;
+                        }
+
+                        if (streq_ptr(arg_type, CRYPT_TCRYPT))
+                                r = attach_tcrypt(cd, argv[2], key_file, passwords, flags);
+                        else
+                                r = attach_luks_or_plain(cd,
+                                                         argv[2],
+                                                         key_file,
+                                                         arg_header ? argv[3] : NULL,
+                                                         passwords,
+                                                         flags);
+                        if (r >= 0)
+                                break;
+                        if (r != -EAGAIN)
+                                return r;
+
+                        /* Passphrase not correct? Let's try again! */
+                        key_file = NULL;
+                }
+
+                if (arg_tries != 0 && tries >= arg_tries)
+                        return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to activate; giving up.");
+
+        } else if (streq(argv[1], "detach")) {
+
+                r = crypt_init_by_name(&cd, argv[2]);
+                if (r == -ENODEV) {
+                        log_info("Volume %s already inactive.", argv[2]);
+                        return 0;
+                }
+                if (r < 0)
+                        return log_error_errno(r, "crypt_init_by_name() failed: %m");
+
+                crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
+
+                r = crypt_deactivate(cd, argv[2]);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to deactivate: %m");
+
+        } else
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb %s.", argv[1]);
+
+        return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);