/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include "cgroup-util.h" #include "dns-domain.h" #include "env-util.h" #include "fd-util.h" #include "fileio.h" #include "fs-util.h" #include "hexdecoct.h" #include "hostname-util.h" #include "memory-util.h" #include "path-util.h" #include "pkcs11-util.h" #include "rlimit-util.h" #include "stat-util.h" #include "string-table.h" #include "strv.h" #include "user-record.h" #include "user-util.h" #define DEFAULT_RATELIMIT_BURST 30 #define DEFAULT_RATELIMIT_INTERVAL_USEC (1*USEC_PER_MINUTE) #if ENABLE_COMPAT_MUTABLE_UID_BOUNDARIES static int parse_alloc_uid(const char *path, const char *name, const char *t, uid_t *ret_uid) { uid_t uid; int r; r = parse_uid(t, &uid); if (r < 0) return log_debug_errno(r, "%s: failed to parse %s %s, ignoring: %m", path, name, t); if (uid == 0) uid = 1; *ret_uid = uid; return 0; } #endif int read_login_defs(UGIDAllocationRange *ret_defs, const char *path, const char *root) { UGIDAllocationRange defs = { .system_alloc_uid_min = SYSTEM_ALLOC_UID_MIN, .system_uid_max = SYSTEM_UID_MAX, .system_alloc_gid_min = SYSTEM_ALLOC_GID_MIN, .system_gid_max = SYSTEM_GID_MAX, }; #if ENABLE_COMPAT_MUTABLE_UID_BOUNDARIES _cleanup_fclose_ FILE *f = NULL; int r; if (!path) path = "/etc/login.defs"; r = chase_symlinks_and_fopen_unlocked(path, root, CHASE_PREFIX_ROOT, "re", &f, NULL); if (r == -ENOENT) goto assign; if (r < 0) return log_debug_errno(r, "Failed to open %s: %m", path); for (;;) { _cleanup_free_ char *line = NULL; char *t; r = read_line(f, LINE_MAX, &line); if (r < 0) return log_debug_errno(r, "Failed to read %s: %m", path); if (r == 0) break; if ((t = first_word(line, "SYS_UID_MIN"))) (void) parse_alloc_uid(path, "SYS_UID_MIN", t, &defs.system_alloc_uid_min); else if ((t = first_word(line, "SYS_UID_MAX"))) (void) parse_alloc_uid(path, "SYS_UID_MAX", t, &defs.system_uid_max); else if ((t = first_word(line, "SYS_GID_MIN"))) (void) parse_alloc_uid(path, "SYS_GID_MIN", t, &defs.system_alloc_gid_min); else if ((t = first_word(line, "SYS_GID_MAX"))) (void) parse_alloc_uid(path, "SYS_GID_MAX", t, &defs.system_gid_max); } assign: if (defs.system_alloc_uid_min > defs.system_uid_max) { log_debug("%s: SYS_UID_MIN > SYS_UID_MAX, resetting.", path); defs.system_alloc_uid_min = MIN(defs.system_uid_max - 1, (uid_t) SYSTEM_ALLOC_UID_MIN); /* Look at sys_uid_max to make sure sys_uid_min..sys_uid_max remains a valid range. */ } if (defs.system_alloc_gid_min > defs.system_gid_max) { log_debug("%s: SYS_GID_MIN > SYS_GID_MAX, resetting.", path); defs.system_alloc_gid_min = MIN(defs.system_gid_max - 1, (gid_t) SYSTEM_ALLOC_GID_MIN); /* Look at sys_gid_max to make sure sys_gid_min..sys_gid_max remains a valid range. */ } #endif *ret_defs = defs; return 0; } const UGIDAllocationRange *acquire_ugid_allocation_range(void) { #if ENABLE_COMPAT_MUTABLE_UID_BOUNDARIES static thread_local UGIDAllocationRange defs = { #else static const UGIDAllocationRange defs = { #endif .system_alloc_uid_min = SYSTEM_ALLOC_UID_MIN, .system_uid_max = SYSTEM_UID_MAX, .system_alloc_gid_min = SYSTEM_ALLOC_GID_MIN, .system_gid_max = SYSTEM_GID_MAX, }; #if ENABLE_COMPAT_MUTABLE_UID_BOUNDARIES /* This function will ignore failure to read the file, so it should only be called from places where * we don't crucially depend on the answer. In other words, it's appropriate for journald, but * probably not for sysusers. */ static thread_local bool initialized = false; if (!initialized) { (void) read_login_defs(&defs, NULL, NULL); initialized = true; } #endif return &defs; } bool uid_is_system(uid_t uid) { const UGIDAllocationRange *defs; assert_se(defs = acquire_ugid_allocation_range()); return uid <= defs->system_uid_max; } bool gid_is_system(gid_t gid) { const UGIDAllocationRange *defs; assert_se(defs = acquire_ugid_allocation_range()); return gid <= defs->system_gid_max; } UserRecord* user_record_new(void) { UserRecord *h; h = new(UserRecord, 1); if (!h) return NULL; *h = (UserRecord) { .n_ref = 1, .disposition = _USER_DISPOSITION_INVALID, .last_change_usec = UINT64_MAX, .last_password_change_usec = UINT64_MAX, .umask = MODE_INVALID, .nice_level = INT_MAX, .not_before_usec = UINT64_MAX, .not_after_usec = UINT64_MAX, .locked = -1, .storage = _USER_STORAGE_INVALID, .access_mode = MODE_INVALID, .disk_size = UINT64_MAX, .disk_size_relative = UINT64_MAX, .tasks_max = UINT64_MAX, .memory_high = UINT64_MAX, .memory_max = UINT64_MAX, .cpu_weight = UINT64_MAX, .io_weight = UINT64_MAX, .uid = UID_INVALID, .gid = GID_INVALID, .nodev = true, .nosuid = true, .luks_discard = -1, .luks_offline_discard = -1, .luks_volume_key_size = UINT64_MAX, .luks_pbkdf_time_cost_usec = UINT64_MAX, .luks_pbkdf_memory_cost = UINT64_MAX, .luks_pbkdf_parallel_threads = UINT64_MAX, .disk_usage = UINT64_MAX, .disk_free = UINT64_MAX, .disk_ceiling = UINT64_MAX, .disk_floor = UINT64_MAX, .signed_locally = -1, .good_authentication_counter = UINT64_MAX, .bad_authentication_counter = UINT64_MAX, .last_good_authentication_usec = UINT64_MAX, .last_bad_authentication_usec = UINT64_MAX, .ratelimit_begin_usec = UINT64_MAX, .ratelimit_count = UINT64_MAX, .ratelimit_interval_usec = UINT64_MAX, .ratelimit_burst = UINT64_MAX, .removable = -1, .enforce_password_policy = -1, .auto_login = -1, .stop_delay_usec = UINT64_MAX, .kill_processes = -1, .password_change_min_usec = UINT64_MAX, .password_change_max_usec = UINT64_MAX, .password_change_warn_usec = UINT64_MAX, .password_change_inactive_usec = UINT64_MAX, .password_change_now = -1, .pkcs11_protected_authentication_path_permitted = -1, .fido2_user_presence_permitted = -1, }; return h; } static void pkcs11_encrypted_key_done(Pkcs11EncryptedKey *k) { if (!k) return; free(k->uri); erase_and_free(k->data); erase_and_free(k->hashed_password); } static void fido2_hmac_credential_done(Fido2HmacCredential *c) { if (!c) return; free(c->id); } static void fido2_hmac_salt_done(Fido2HmacSalt *s) { if (!s) return; fido2_hmac_credential_done(&s->credential); erase_and_free(s->salt); erase_and_free(s->hashed_password); } static void recovery_key_done(RecoveryKey *k) { if (!k) return; free(k->type); erase_and_free(k->hashed_password); } static UserRecord* user_record_free(UserRecord *h) { if (!h) return NULL; free(h->user_name); free(h->realm); free(h->user_name_and_realm_auto); free(h->real_name); free(h->email_address); erase_and_free(h->password_hint); free(h->location); free(h->icon_name); free(h->shell); strv_free(h->environment); free(h->time_zone); free(h->preferred_language); rlimit_free_all(h->rlimits); free(h->skeleton_directory); strv_free_erase(h->hashed_password); strv_free_erase(h->ssh_authorized_keys); strv_free_erase(h->password); strv_free_erase(h->token_pin); free(h->cifs_service); free(h->cifs_user_name); free(h->cifs_domain); free(h->image_path); free(h->image_path_auto); free(h->home_directory); free(h->home_directory_auto); strv_free(h->member_of); free(h->file_system_type); free(h->luks_cipher); free(h->luks_cipher_mode); free(h->luks_pbkdf_hash_algorithm); free(h->luks_pbkdf_type); free(h->state); free(h->service); strv_free(h->pkcs11_token_uri); for (size_t i = 0; i < h->n_pkcs11_encrypted_key; i++) pkcs11_encrypted_key_done(h->pkcs11_encrypted_key + i); free(h->pkcs11_encrypted_key); for (size_t i = 0; i < h->n_fido2_hmac_credential; i++) fido2_hmac_credential_done(h->fido2_hmac_credential + i); for (size_t i = 0; i < h->n_fido2_hmac_salt; i++) fido2_hmac_salt_done(h->fido2_hmac_salt + i); strv_free(h->recovery_key_type); for (size_t i = 0; i < h->n_recovery_key; i++) recovery_key_done(h->recovery_key + i); json_variant_unref(h->json); return mfree(h); } DEFINE_TRIVIAL_REF_UNREF_FUNC(UserRecord, user_record, user_record_free); int json_dispatch_realm(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; int r; if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); r = dns_name_is_valid(n); if (r < 0) return json_log(variant, flags, r, "Failed to check if JSON field '%s' is a valid DNS domain.", strna(name)); if (r == 0) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid DNS domain.", strna(name)); r = free_and_strdup(s, n); if (r < 0) return json_log(variant, flags, r, "Failed to allocate string: %m"); return 0; } int json_dispatch_gecos(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); if (valid_gecos(n)) { if (free_and_strdup(s, n) < 0) return json_log_oom(variant, flags); } else { _cleanup_free_ char *m = NULL; json_log(variant, flags|JSON_DEBUG, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid GECOS compatible string, mangling.", strna(name)); m = mangle_gecos(n); if (!m) return json_log_oom(variant, flags); free_and_replace(*s, m); } return 0; } static int json_dispatch_nice(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { int *nl = userdata; intmax_t m; if (json_variant_is_null(variant)) { *nl = INT_MAX; return 0; } if (!json_variant_is_integer(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); m = json_variant_integer(variant); if (m < PRIO_MIN || m >= PRIO_MAX) return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' is not a valid nice level.", strna(name)); *nl = m; return 0; } static int json_dispatch_rlimit_value(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { rlim_t *ret = userdata; if (json_variant_is_null(variant)) *ret = RLIM_INFINITY; else if (json_variant_is_unsigned(variant)) { uintmax_t w; w = json_variant_unsigned(variant); if (w == RLIM_INFINITY || (uintmax_t) w != json_variant_unsigned(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "Resource limit value '%s' is out of range.", name); *ret = (rlim_t) w; } else return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Resource limit value '%s' is not an unsigned integer.", name); return 0; } static int json_dispatch_rlimits(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { struct rlimit** limits = userdata; JsonVariant *value; const char *key; int r; assert_se(limits); if (json_variant_is_null(variant)) { rlimit_free_all(limits); return 0; } if (!json_variant_is_object(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an object.", strna(name)); JSON_VARIANT_OBJECT_FOREACH(key, value, variant) { JsonVariant *jcur, *jmax; struct rlimit rl; const char *p; int l; p = startswith(key, "RLIMIT_"); if (!p) l = -1; else l = rlimit_from_string(p); if (l < 0) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Resource limit '%s' not known.", key); if (!json_variant_is_object(value)) return json_log(value, flags, SYNTHETIC_ERRNO(EINVAL), "Resource limit '%s' has invalid value.", key); if (json_variant_elements(value) != 4) return json_log(value, flags, SYNTHETIC_ERRNO(EINVAL), "Resource limit '%s' value is does not have two fields as expected.", key); jcur = json_variant_by_key(value, "cur"); if (!jcur) return json_log(value, flags, SYNTHETIC_ERRNO(EINVAL), "Resource limit '%s' lacks 'cur' field.", key); r = json_dispatch_rlimit_value("cur", jcur, flags, &rl.rlim_cur); if (r < 0) return r; jmax = json_variant_by_key(value, "max"); if (!jmax) return json_log(value, flags, SYNTHETIC_ERRNO(EINVAL), "Resource limit '%s' lacks 'max' field.", key); r = json_dispatch_rlimit_value("max", jmax, flags, &rl.rlim_max); if (r < 0) return r; if (limits[l]) *(limits[l]) = rl; else { limits[l] = newdup(struct rlimit, &rl, 1); if (!limits[l]) return log_oom(); } } return 0; } static int json_dispatch_filename_or_path(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; int r; assert(s); if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); if (!filename_is_valid(n) && !path_is_normalized(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid file name or normalized path.", strna(name)); r = free_and_strdup(s, n); if (r < 0) return json_log(variant, flags, r, "Failed to allocate string: %m"); return 0; } static int json_dispatch_path(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; int r; if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); if (!path_is_normalized(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a normalized file system path.", strna(name)); if (!path_is_absolute(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an absolute file system path.", strna(name)); r = free_and_strdup(s, n); if (r < 0) return json_log(variant, flags, r, "Failed to allocate string: %m"); return 0; } static int json_dispatch_home_directory(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; int r; if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); if (!valid_home(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid home directory path.", strna(name)); r = free_and_strdup(s, n); if (r < 0) return json_log(variant, flags, r, "Failed to allocate string: %m"); return 0; } static int json_dispatch_image_path(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; int r; if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); if (empty_or_root(n) || !path_is_valid(n) || !path_is_absolute(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid image path.", strna(name)); r = free_and_strdup(s, n); if (r < 0) return json_log(variant, flags, r, "Failed to allocate string: %m"); return 0; } static int json_dispatch_umask(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { mode_t *m = userdata; uintmax_t k; if (json_variant_is_null(variant)) { *m = (mode_t) -1; return 0; } if (!json_variant_is_unsigned(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a number.", strna(name)); k = json_variant_unsigned(variant); if (k > 0777) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' outside of valid range 0…0777.", strna(name)); *m = (mode_t) k; return 0; } static int json_dispatch_access_mode(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { mode_t *m = userdata; uintmax_t k; if (json_variant_is_null(variant)) { *m = (mode_t) -1; return 0; } if (!json_variant_is_unsigned(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a number.", strna(name)); k = json_variant_unsigned(variant); if (k > 07777) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' outside of valid range 0…07777.", strna(name)); *m = (mode_t) k; return 0; } static int json_dispatch_environment(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { _cleanup_strv_free_ char **n = NULL; char ***l = userdata; size_t i; int r; if (json_variant_is_null(variant)) { *l = strv_free(*l); return 0; } if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array.", strna(name)); for (i = 0; i < json_variant_elements(variant); i++) { _cleanup_free_ char *c = NULL; JsonVariant *e; const char *a; e = json_variant_by_index(variant, i); if (!json_variant_is_string(e)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of strings.", strna(name)); assert_se(a = json_variant_string(e)); if (!env_assignment_is_valid(a)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of environment variables.", strna(name)); c = strdup(a); if (!c) return json_log_oom(variant, flags); r = strv_env_replace(&n, c); if (r < 0) return json_log_oom(variant, flags); c = NULL; } strv_free_and_replace(*l, n); return 0; } int json_dispatch_user_disposition(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { UserDisposition *disposition = userdata, k; if (json_variant_is_null(variant)) { *disposition = _USER_DISPOSITION_INVALID; return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); k = user_disposition_from_string(json_variant_string(variant)); if (k < 0) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Disposition type '%s' not known.", json_variant_string(variant)); *disposition = k; return 0; } static int json_dispatch_storage(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { UserStorage *storage = userdata, k; if (json_variant_is_null(variant)) { *storage = _USER_STORAGE_INVALID; return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); k = user_storage_from_string(json_variant_string(variant)); if (k < 0) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Storage type '%s' not known.", json_variant_string(variant)); *storage = k; return 0; } static int json_dispatch_disk_size(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { uint64_t *size = userdata; uintmax_t k; if (json_variant_is_null(variant)) { *size = UINT64_MAX; return 0; } if (!json_variant_is_unsigned(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); k = json_variant_unsigned(variant); if (k < USER_DISK_SIZE_MIN || k > USER_DISK_SIZE_MAX) return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' is not in valid range %" PRIu64 "…%" PRIu64 ".", strna(name), USER_DISK_SIZE_MIN, USER_DISK_SIZE_MAX); *size = k; return 0; } static int json_dispatch_tasks_or_memory_max(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { uint64_t *limit = userdata; uintmax_t k; if (json_variant_is_null(variant)) { *limit = UINT64_MAX; return 0; } if (!json_variant_is_unsigned(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a integer.", strna(name)); k = json_variant_unsigned(variant); if (k <= 0 || k >= UINT64_MAX) return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' is not in valid range %" PRIu64 "…%" PRIu64 ".", strna(name), (uint64_t) 1, UINT64_MAX-1); *limit = k; return 0; } static int json_dispatch_weight(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { uint64_t *weight = userdata; uintmax_t k; if (json_variant_is_null(variant)) { *weight = UINT64_MAX; return 0; } if (!json_variant_is_unsigned(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a integer.", strna(name)); k = json_variant_unsigned(variant); if (k <= CGROUP_WEIGHT_MIN || k >= CGROUP_WEIGHT_MAX) return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' is not in valid range %" PRIu64 "…%" PRIu64 ".", strna(name), (uint64_t) CGROUP_WEIGHT_MIN, (uint64_t) CGROUP_WEIGHT_MAX); *weight = k; return 0; } int json_dispatch_user_group_list(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { _cleanup_strv_free_ char **l = NULL; char ***list = userdata; JsonVariant *e; int r; if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of strings.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { if (!json_variant_is_string(e)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); if (!valid_user_group_name(json_variant_string(e), FLAGS_SET(flags, JSON_RELAX) ? VALID_USER_RELAX : 0)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a valid user/group name: %s", json_variant_string(e)); r = strv_extend(&l, json_variant_string(e)); if (r < 0) return json_log(e, flags, r, "Failed to append array element: %m"); } r = strv_extend_strv(list, l, true); if (r < 0) return json_log(variant, flags, r, "Failed to merge user/group arrays: %m"); return 0; } static int dispatch_secret(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { static const JsonDispatch secret_dispatch_table[] = { { "password", _JSON_VARIANT_TYPE_INVALID, json_dispatch_strv, offsetof(UserRecord, password), 0 }, { "tokenPin", _JSON_VARIANT_TYPE_INVALID, json_dispatch_strv, offsetof(UserRecord, token_pin), 0 }, { "pkcs11Pin", /* legacy alias */ _JSON_VARIANT_TYPE_INVALID, json_dispatch_strv, offsetof(UserRecord, token_pin), 0 }, { "pkcs11ProtectedAuthenticationPathPermitted", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, pkcs11_protected_authentication_path_permitted), 0 }, { "fido2UserPresencePermitted", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, fido2_user_presence_permitted), 0 }, {}, }; return json_dispatch(variant, secret_dispatch_table, NULL, flags, userdata); } static int dispatch_pkcs11_uri(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { char **s = userdata; const char *n; int r; if (json_variant_is_null(variant)) { *s = mfree(*s); return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); n = json_variant_string(variant); if (!pkcs11_uri_valid(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid RFC7512 PKCS#11 URI.", strna(name)); r = free_and_strdup(s, n); if (r < 0) return json_log(variant, flags, r, "Failed to allocate string: %m"); return 0; } static int dispatch_pkcs11_uri_array(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { _cleanup_strv_free_ char **z = NULL; char ***l = userdata; JsonVariant *e; int r; if (json_variant_is_null(variant)) { *l = strv_free(*l); return 0; } if (json_variant_is_string(variant)) { const char *n; n = json_variant_string(variant); if (!pkcs11_uri_valid(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid RFC7512 PKCS#11 URI.", strna(name)); z = strv_new(n); if (!z) return log_oom(); } else { if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string or array of strings.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { const char *n; if (!json_variant_is_string(e)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); n = json_variant_string(e); if (!pkcs11_uri_valid(n)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element in '%s' is not a valid RFC7512 PKCS#11 URI: %s", strna(name), n); r = strv_extend(&z, n); if (r < 0) return log_oom(); } } strv_free_and_replace(*l, z); return 0; } static int dispatch_pkcs11_key_data(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { Pkcs11EncryptedKey *k = userdata; size_t l; void *b; int r; if (json_variant_is_null(variant)) { k->data = erase_and_free(k->data); k->size = 0; return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); r = unbase64mem(json_variant_string(variant), (size_t) -1, &b, &l); if (r < 0) return json_log(variant, flags, r, "Failed to decode encrypted PKCS#11 key: %m"); erase_and_free(k->data); k->data = b; k->size = l; return 0; } static int dispatch_pkcs11_key(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { UserRecord *h = userdata; JsonVariant *e; int r; if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of objects.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { Pkcs11EncryptedKey *array, *k; static const JsonDispatch pkcs11_key_dispatch_table[] = { { "uri", JSON_VARIANT_STRING, dispatch_pkcs11_uri, offsetof(Pkcs11EncryptedKey, uri), JSON_MANDATORY }, { "data", JSON_VARIANT_STRING, dispatch_pkcs11_key_data, 0, JSON_MANDATORY }, { "hashedPassword", JSON_VARIANT_STRING, json_dispatch_string, offsetof(Pkcs11EncryptedKey, hashed_password), JSON_MANDATORY }, {}, }; if (!json_variant_is_object(e)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not an object."); array = reallocarray(h->pkcs11_encrypted_key, h->n_pkcs11_encrypted_key + 1, sizeof(Pkcs11EncryptedKey)); if (!array) return log_oom(); h->pkcs11_encrypted_key = array; k = h->pkcs11_encrypted_key + h->n_pkcs11_encrypted_key; *k = (Pkcs11EncryptedKey) {}; r = json_dispatch(e, pkcs11_key_dispatch_table, NULL, flags, k); if (r < 0) { pkcs11_encrypted_key_done(k); return r; } h->n_pkcs11_encrypted_key++; } return 0; } static int dispatch_fido2_hmac_credential(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { Fido2HmacCredential *k = userdata; size_t l; void *b; int r; if (json_variant_is_null(variant)) { k->id = mfree(k->id); k->size = 0; return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); r = unbase64mem(json_variant_string(variant), (size_t) -1, &b, &l); if (r < 0) return json_log(variant, flags, r, "Failed to decode FIDO2 credential ID: %m"); free_and_replace(k->id, b); k->size = l; return 0; } static int dispatch_fido2_hmac_credential_array(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { UserRecord *h = userdata; JsonVariant *e; int r; if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of strings.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { Fido2HmacCredential *array; size_t l; void *b; if (!json_variant_is_string(e)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); array = reallocarray(h->fido2_hmac_credential, h->n_fido2_hmac_credential + 1, sizeof(Fido2HmacCredential)); if (!array) return log_oom(); r = unbase64mem(json_variant_string(e), (size_t) -1, &b, &l); if (r < 0) return json_log(variant, flags, r, "Failed to decode FIDO2 credential ID: %m"); h->fido2_hmac_credential = array; h->fido2_hmac_credential[h->n_fido2_hmac_credential++] = (Fido2HmacCredential) { .id = b, .size = l, }; } return 0; } static int dispatch_fido2_hmac_salt_value(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { Fido2HmacSalt *k = userdata; size_t l; void *b; int r; if (json_variant_is_null(variant)) { k->salt = erase_and_free(k->salt); k->salt_size = 0; return 0; } if (!json_variant_is_string(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); r = unbase64mem(json_variant_string(variant), (size_t) -1, &b, &l); if (r < 0) return json_log(variant, flags, r, "Failed to decode FIDO2 salt: %m"); erase_and_free(k->salt); k->salt = b; k->salt_size = l; return 0; } static int dispatch_fido2_hmac_salt(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { UserRecord *h = userdata; JsonVariant *e; int r; if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of objects.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { Fido2HmacSalt *array, *k; static const JsonDispatch fido2_hmac_salt_dispatch_table[] = { { "credential", JSON_VARIANT_STRING, dispatch_fido2_hmac_credential, offsetof(Fido2HmacSalt, credential), JSON_MANDATORY }, { "salt", JSON_VARIANT_STRING, dispatch_fido2_hmac_salt_value, 0, JSON_MANDATORY }, { "hashedPassword", JSON_VARIANT_STRING, json_dispatch_string, offsetof(Fido2HmacSalt, hashed_password), JSON_MANDATORY }, {}, }; if (!json_variant_is_object(e)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not an object."); array = reallocarray(h->fido2_hmac_salt, h->n_fido2_hmac_salt + 1, sizeof(Fido2HmacSalt)); if (!array) return log_oom(); h->fido2_hmac_salt = array; k = h->fido2_hmac_salt + h->n_fido2_hmac_salt; *k = (Fido2HmacSalt) {}; r = json_dispatch(e, fido2_hmac_salt_dispatch_table, NULL, flags, k); if (r < 0) { fido2_hmac_salt_done(k); return r; } h->n_fido2_hmac_salt++; } return 0; } static int dispatch_recovery_key(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { UserRecord *h = userdata; JsonVariant *e; int r; if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of objects.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { RecoveryKey *array, *k; static const JsonDispatch recovery_key_dispatch_table[] = { { "type", JSON_VARIANT_STRING, json_dispatch_string, 0, JSON_MANDATORY }, { "hashedPassword", JSON_VARIANT_STRING, json_dispatch_string, offsetof(RecoveryKey, hashed_password), JSON_MANDATORY }, {}, }; if (!json_variant_is_object(e)) return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not an object."); array = reallocarray(h->recovery_key, h->n_recovery_key + 1, sizeof(RecoveryKey)); if (!array) return log_oom(); h->recovery_key = array; k = h->recovery_key + h->n_recovery_key; *k = (RecoveryKey) {}; r = json_dispatch(e, recovery_key_dispatch_table, NULL, flags, k); if (r < 0) { recovery_key_done(k); return r; } h->n_recovery_key++; } return 0; } static int dispatch_privileged(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { static const JsonDispatch privileged_dispatch_table[] = { { "passwordHint", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, password_hint), 0 }, { "hashedPassword", _JSON_VARIANT_TYPE_INVALID, json_dispatch_strv, offsetof(UserRecord, hashed_password), JSON_SAFE }, { "sshAuthorizedKeys", _JSON_VARIANT_TYPE_INVALID, json_dispatch_strv, offsetof(UserRecord, ssh_authorized_keys), 0 }, { "pkcs11EncryptedKey", JSON_VARIANT_ARRAY, dispatch_pkcs11_key, 0, 0 }, { "fido2HmacSalt", JSON_VARIANT_ARRAY, dispatch_fido2_hmac_salt, 0, 0 }, { "recoveryKey", JSON_VARIANT_ARRAY, dispatch_recovery_key, 0, 0 }, {}, }; return json_dispatch(variant, privileged_dispatch_table, NULL, flags, userdata); } static int dispatch_binding(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { static const JsonDispatch binding_dispatch_table[] = { { "imagePath", JSON_VARIANT_STRING, json_dispatch_image_path, offsetof(UserRecord, image_path), 0 }, { "homeDirectory", JSON_VARIANT_STRING, json_dispatch_home_directory, offsetof(UserRecord, home_directory), 0 }, { "partitionUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, partition_uuid), 0 }, { "luksUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, luks_uuid), 0 }, { "fileSystemUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, file_system_uuid), 0 }, { "uid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(UserRecord, uid), 0 }, { "gid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(UserRecord, gid), 0 }, { "storage", JSON_VARIANT_STRING, json_dispatch_storage, offsetof(UserRecord, storage), 0 }, { "fileSystemType", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, file_system_type), JSON_SAFE }, { "luksCipher", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_cipher), JSON_SAFE }, { "luksCipherMode", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_cipher_mode), JSON_SAFE }, { "luksVolumeKeySize", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_volume_key_size), 0 }, {}, }; char smid[SD_ID128_STRING_MAX]; JsonVariant *m; sd_id128_t mid; int r; if (!variant) return 0; if (!json_variant_is_object(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an object.", strna(name)); r = sd_id128_get_machine(&mid); if (r < 0) return json_log(variant, flags, r, "Failed to determine machine ID: %m"); m = json_variant_by_key(variant, sd_id128_to_string(mid, smid)); if (!m) return 0; return json_dispatch(m, binding_dispatch_table, NULL, flags, userdata); } int per_machine_id_match(JsonVariant *ids, JsonDispatchFlags flags) { sd_id128_t mid; int r; r = sd_id128_get_machine(&mid); if (r < 0) return json_log(ids, flags, r, "Failed to acquire machine ID: %m"); if (json_variant_is_string(ids)) { sd_id128_t k; r = sd_id128_from_string(json_variant_string(ids), &k); if (r < 0) { json_log(ids, flags, r, "%s is not a valid machine ID, ignoring: %m", json_variant_string(ids)); return 0; } return sd_id128_equal(mid, k); } if (json_variant_is_array(ids)) { JsonVariant *e; JSON_VARIANT_ARRAY_FOREACH(e, ids) { sd_id128_t k; if (!json_variant_is_string(e)) { json_log(e, flags, 0, "Machine ID is not a string, ignoring: %m"); continue; } r = sd_id128_from_string(json_variant_string(e), &k); if (r < 0) { json_log(e, flags, r, "%s is not a valid machine ID, ignoring: %m", json_variant_string(e)); continue; } if (sd_id128_equal(mid, k)) return true; } return false; } json_log(ids, flags, 0, "Machine ID is not a string or array of strings, ignoring: %m"); return false; } int per_machine_hostname_match(JsonVariant *hns, JsonDispatchFlags flags) { _cleanup_free_ char *hn = NULL; int r; r = gethostname_strict(&hn); if (r == -ENXIO) { json_log(hns, flags, r, "No hostname set, not matching perMachine hostname record: %m"); return false; } if (r < 0) return json_log(hns, flags, r, "Failed to acquire hostname: %m"); if (json_variant_is_string(hns)) return streq(json_variant_string(hns), hn); if (json_variant_is_array(hns)) { JsonVariant *e; JSON_VARIANT_ARRAY_FOREACH(e, hns) { if (!json_variant_is_string(e)) { json_log(e, flags, 0, "Hostname is not a string, ignoring: %m"); continue; } if (streq(json_variant_string(hns), hn)) return true; } return false; } json_log(hns, flags, 0, "Hostname is not a string or array of strings, ignoring: %m"); return false; } static int dispatch_per_machine(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { static const JsonDispatch per_machine_dispatch_table[] = { { "matchMachineId", _JSON_VARIANT_TYPE_INVALID, NULL, 0, 0 }, { "matchHostname", _JSON_VARIANT_TYPE_INVALID, NULL, 0, 0 }, { "iconName", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, icon_name), JSON_SAFE }, { "location", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, location), 0 }, { "shell", JSON_VARIANT_STRING, json_dispatch_filename_or_path, offsetof(UserRecord, shell), 0 }, { "umask", JSON_VARIANT_UNSIGNED, json_dispatch_umask, offsetof(UserRecord, umask), 0 }, { "environment", JSON_VARIANT_ARRAY, json_dispatch_environment, offsetof(UserRecord, environment), 0 }, { "timeZone", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, time_zone), JSON_SAFE }, { "preferredLanguage", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, preferred_language), JSON_SAFE }, { "niceLevel", _JSON_VARIANT_TYPE_INVALID, json_dispatch_nice, offsetof(UserRecord, nice_level), 0 }, { "resourceLimits", _JSON_VARIANT_TYPE_INVALID, json_dispatch_rlimits, offsetof(UserRecord, rlimits), 0 }, { "locked", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, locked), 0 }, { "notBeforeUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, not_before_usec), 0 }, { "notAfterUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, not_after_usec), 0 }, { "storage", JSON_VARIANT_STRING, json_dispatch_storage, offsetof(UserRecord, storage), 0 }, { "diskSize", JSON_VARIANT_UNSIGNED, json_dispatch_disk_size, offsetof(UserRecord, disk_size), 0 }, { "diskSizeRelative", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_size_relative), 0 }, { "skeletonDirectory", JSON_VARIANT_STRING, json_dispatch_path, offsetof(UserRecord, skeleton_directory), 0 }, { "accessMode", JSON_VARIANT_UNSIGNED, json_dispatch_access_mode, offsetof(UserRecord, access_mode), 0 }, { "tasksMax", JSON_VARIANT_UNSIGNED, json_dispatch_tasks_or_memory_max, offsetof(UserRecord, tasks_max), 0 }, { "memoryHigh", JSON_VARIANT_UNSIGNED, json_dispatch_tasks_or_memory_max, offsetof(UserRecord, memory_high), 0 }, { "memoryMax", JSON_VARIANT_UNSIGNED, json_dispatch_tasks_or_memory_max, offsetof(UserRecord, memory_max), 0 }, { "cpuWeight", JSON_VARIANT_UNSIGNED, json_dispatch_weight, offsetof(UserRecord, cpu_weight), 0 }, { "ioWeight", JSON_VARIANT_UNSIGNED, json_dispatch_weight, offsetof(UserRecord, io_weight), 0 }, { "mountNoDevices", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, nodev), 0 }, { "mountNoSuid", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, nosuid), 0 }, { "mountNoExecute", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, noexec), 0 }, { "cifsDomain", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, cifs_domain), JSON_SAFE }, { "cifsUserName", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, cifs_user_name), JSON_SAFE }, { "cifsService", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, cifs_service), JSON_SAFE }, { "imagePath", JSON_VARIANT_STRING, json_dispatch_path, offsetof(UserRecord, image_path), 0 }, { "uid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(UserRecord, uid), 0 }, { "gid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(UserRecord, gid), 0 }, { "memberOf", JSON_VARIANT_ARRAY, json_dispatch_user_group_list, offsetof(UserRecord, member_of), JSON_RELAX}, { "fileSystemType", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, file_system_type), JSON_SAFE }, { "partitionUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, partition_uuid), 0 }, { "luksUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, luks_uuid), 0 }, { "fileSystemUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, file_system_uuid), 0 }, { "luksDiscard", _JSON_VARIANT_TYPE_INVALID, json_dispatch_tristate, offsetof(UserRecord, luks_discard), 0, }, { "luksOfflineDiscard", _JSON_VARIANT_TYPE_INVALID, json_dispatch_tristate, offsetof(UserRecord, luks_offline_discard), 0, }, { "luksCipher", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_cipher), JSON_SAFE }, { "luksCipherMode", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_cipher_mode), JSON_SAFE }, { "luksVolumeKeySize", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_volume_key_size), 0 }, { "luksPbkdfHashAlgorithm", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_pbkdf_hash_algorithm), JSON_SAFE }, { "luksPbkdfType", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_pbkdf_type), JSON_SAFE }, { "luksPbkdfTimeCostUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_pbkdf_time_cost_usec), 0 }, { "luksPbkdfMemoryCost", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_pbkdf_memory_cost), 0 }, { "luksPbkdfParallelThreads", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_pbkdf_parallel_threads), 0 }, { "rateLimitIntervalUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, ratelimit_interval_usec), 0 }, { "rateLimitBurst", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, ratelimit_burst), 0 }, { "enforcePasswordPolicy", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, enforce_password_policy), 0 }, { "autoLogin", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, auto_login), 0 }, { "stopDelayUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, stop_delay_usec), 0 }, { "killProcesses", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, kill_processes), 0 }, { "passwordChangeMinUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_min_usec), 0 }, { "passwordChangeMaxUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_max_usec), 0 }, { "passwordChangeWarnUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_warn_usec), 0 }, { "passwordChangeInactiveUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_inactive_usec), 0 }, { "passwordChangeNow", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, password_change_now), 0 }, { "pkcs11TokenUri", JSON_VARIANT_ARRAY, dispatch_pkcs11_uri_array, offsetof(UserRecord, pkcs11_token_uri), 0 }, { "fido2HmacCredential", JSON_VARIANT_ARRAY, dispatch_fido2_hmac_credential_array, 0, 0 }, {}, }; JsonVariant *e; int r; if (!variant) return 0; if (!json_variant_is_array(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array.", strna(name)); JSON_VARIANT_ARRAY_FOREACH(e, variant) { bool matching = false; JsonVariant *m; if (!json_variant_is_object(e)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array of objects.", strna(name)); m = json_variant_by_key(e, "matchMachineId"); if (m) { r = per_machine_id_match(m, flags); if (r < 0) return r; matching = r > 0; } if (!matching) { m = json_variant_by_key(e, "matchHostname"); if (m) { r = per_machine_hostname_match(m, flags); if (r < 0) return r; matching = r > 0; } } if (!matching) continue; r = json_dispatch(e, per_machine_dispatch_table, NULL, flags, userdata); if (r < 0) return r; } return 0; } static int dispatch_status(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { static const JsonDispatch status_dispatch_table[] = { { "diskUsage", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_usage), 0 }, { "diskFree", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_free), 0 }, { "diskSize", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_size), 0 }, { "diskCeiling", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_ceiling), 0 }, { "diskFloor", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_floor), 0 }, { "state", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, state), JSON_SAFE }, { "service", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, service), JSON_SAFE }, { "signedLocally", _JSON_VARIANT_TYPE_INVALID, json_dispatch_tristate, offsetof(UserRecord, signed_locally), 0 }, { "goodAuthenticationCounter", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, good_authentication_counter), 0 }, { "badAuthenticationCounter", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, bad_authentication_counter), 0 }, { "lastGoodAuthenticationUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, last_good_authentication_usec), 0 }, { "lastBadAuthenticationUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, last_bad_authentication_usec), 0 }, { "rateLimitBeginUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, ratelimit_begin_usec), 0 }, { "rateLimitCount", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, ratelimit_count), 0 }, { "removable", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, removable), 0 }, {}, }; char smid[SD_ID128_STRING_MAX]; JsonVariant *m; sd_id128_t mid; int r; if (!variant) return 0; if (!json_variant_is_object(variant)) return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an object.", strna(name)); r = sd_id128_get_machine(&mid); if (r < 0) return json_log(variant, flags, r, "Failed to determine machine ID: %m"); m = json_variant_by_key(variant, sd_id128_to_string(mid, smid)); if (!m) return 0; return json_dispatch(m, status_dispatch_table, NULL, flags, userdata); } int user_record_build_image_path(UserStorage storage, const char *user_name_and_realm, char **ret) { const char *suffix; char *z; assert(storage >= 0); assert(user_name_and_realm); assert(ret); if (storage == USER_LUKS) suffix = ".home"; else if (IN_SET(storage, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT)) suffix = ".homedir"; else { *ret = NULL; return 0; } z = strjoin("/home/", user_name_and_realm, suffix); if (!z) return -ENOMEM; *ret = z; return 1; } static int user_record_augment(UserRecord *h, JsonDispatchFlags json_flags) { int r; assert(h); if (!FLAGS_SET(h->mask, USER_RECORD_REGULAR)) return 0; assert(h->user_name); if (!h->user_name_and_realm_auto && h->realm) { h->user_name_and_realm_auto = strjoin(h->user_name, "@", h->realm); if (!h->user_name_and_realm_auto) return json_log_oom(h->json, json_flags); } /* Let's add in the following automatisms only for regular users, they don't make sense for any others */ if (user_record_disposition(h) != USER_REGULAR) return 0; if (!h->home_directory && !h->home_directory_auto) { h->home_directory_auto = path_join("/home/", h->user_name); if (!h->home_directory_auto) return json_log_oom(h->json, json_flags); } if (!h->image_path && !h->image_path_auto) { r = user_record_build_image_path(user_record_storage(h), user_record_user_name_and_realm(h), &h->image_path_auto); if (r < 0) return json_log(h->json, json_flags, r, "Failed to determine default image path: %m"); } return 0; } int user_group_record_mangle( JsonVariant *v, UserRecordLoadFlags load_flags, JsonVariant **ret_variant, UserRecordMask *ret_mask) { static const struct { UserRecordMask mask; const char *name; } mask_field[] = { { USER_RECORD_PRIVILEGED, "privileged" }, { USER_RECORD_SECRET, "secret" }, { USER_RECORD_BINDING, "binding" }, { USER_RECORD_PER_MACHINE, "perMachine" }, { USER_RECORD_STATUS, "status" }, { USER_RECORD_SIGNATURE, "signature" }, }; JsonDispatchFlags json_flags = USER_RECORD_LOAD_FLAGS_TO_JSON_DISPATCH_FLAGS(load_flags); _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; JsonVariant *array[ELEMENTSOF(mask_field) * 2]; size_t n_retain = 0, i; UserRecordMask m = 0; int r; assert((load_flags & _USER_RECORD_MASK_MAX) == 0); /* detect mistakes when accidentally passing * UserRecordMask bit masks as UserRecordLoadFlags * value */ assert(v); assert(ret_variant); assert(ret_mask); /* Note that this function is shared with the group record parser, hence we try to be generic in our * log message wording here, to cover both cases. */ if (!json_variant_is_object(v)) return json_log(v, json_flags, SYNTHETIC_ERRNO(EBADMSG), "Record is not a JSON object, refusing."); if (USER_RECORD_ALLOW_MASK(load_flags) == 0) /* allow nothing? */ return json_log(v, json_flags, SYNTHETIC_ERRNO(EINVAL), "Nothing allowed in record, refusing."); if (USER_RECORD_STRIP_MASK(load_flags) == _USER_RECORD_MASK_MAX) /* strip everything? */ return json_log(v, json_flags, SYNTHETIC_ERRNO(EINVAL), "Stripping everything from record, refusing."); /* Check if we have the special sections and if they match our flags set */ for (i = 0; i < ELEMENTSOF(mask_field); i++) { JsonVariant *e, *k; if (FLAGS_SET(USER_RECORD_STRIP_MASK(load_flags), mask_field[i].mask)) { if (!w) w = json_variant_ref(v); r = json_variant_filter(&w, STRV_MAKE(mask_field[i].name)); if (r < 0) return json_log(w, json_flags, r, "Failed to remove field from variant: %m"); continue; } e = json_variant_by_key_full(v, mask_field[i].name, &k); if (e) { if (!FLAGS_SET(USER_RECORD_ALLOW_MASK(load_flags), mask_field[i].mask)) return json_log(e, json_flags, SYNTHETIC_ERRNO(EBADMSG), "Record contains '%s' field, which is not allowed.", mask_field[i].name); if (FLAGS_SET(load_flags, USER_RECORD_STRIP_REGULAR)) { array[n_retain++] = k; array[n_retain++] = e; } m |= mask_field[i].mask; } else { if (FLAGS_SET(USER_RECORD_REQUIRE_MASK(load_flags), mask_field[i].mask)) return json_log(v, json_flags, SYNTHETIC_ERRNO(EBADMSG), "Record lacks '%s' field, which is required.", mask_field[i].name); } } if (FLAGS_SET(load_flags, USER_RECORD_STRIP_REGULAR)) { /* If we are supposed to strip regular items, then let's instead just allocate a new object * with just the stuff we need. */ w = json_variant_unref(w); r = json_variant_new_object(&w, array, n_retain); if (r < 0) return json_log(v, json_flags, r, "Failed to allocate new object: %m"); } else { /* And now check if there's anything else in the record */ for (i = 0; i < json_variant_elements(v); i += 2) { const char *f; bool special = false; size_t j; assert_se(f = json_variant_string(json_variant_by_index(v, i))); for (j = 0; j < ELEMENTSOF(mask_field); j++) if (streq(f, mask_field[j].name)) { /* already covered in the loop above */ special = true; continue; } if (!special) { if ((load_flags & (USER_RECORD_ALLOW_REGULAR|USER_RECORD_REQUIRE_REGULAR)) == 0) return json_log(v, json_flags, SYNTHETIC_ERRNO(EBADMSG), "Record contains '%s' field, which is not allowed.", f); m |= USER_RECORD_REGULAR; break; } } } if (FLAGS_SET(load_flags, USER_RECORD_REQUIRE_REGULAR) && !FLAGS_SET(m, USER_RECORD_REGULAR)) return json_log(v, json_flags, SYNTHETIC_ERRNO(EBADMSG), "Record lacks basic identity fields, which are required."); if (m == 0) return json_log(v, json_flags, SYNTHETIC_ERRNO(EBADMSG), "Record is empty."); if (w) *ret_variant = TAKE_PTR(w); else *ret_variant = json_variant_ref(v); *ret_mask = m; return 0; } int user_record_load(UserRecord *h, JsonVariant *v, UserRecordLoadFlags load_flags) { static const JsonDispatch user_dispatch_table[] = { { "userName", JSON_VARIANT_STRING, json_dispatch_user_group_name, offsetof(UserRecord, user_name), JSON_RELAX}, { "realm", JSON_VARIANT_STRING, json_dispatch_realm, offsetof(UserRecord, realm), 0 }, { "realName", JSON_VARIANT_STRING, json_dispatch_gecos, offsetof(UserRecord, real_name), 0 }, { "emailAddress", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, email_address), JSON_SAFE }, { "iconName", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, icon_name), JSON_SAFE }, { "location", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, location), 0 }, { "disposition", JSON_VARIANT_STRING, json_dispatch_user_disposition, offsetof(UserRecord, disposition), 0 }, { "lastChangeUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, last_change_usec), 0 }, { "lastPasswordChangeUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, last_password_change_usec), 0 }, { "shell", JSON_VARIANT_STRING, json_dispatch_filename_or_path, offsetof(UserRecord, shell), 0 }, { "umask", JSON_VARIANT_UNSIGNED, json_dispatch_umask, offsetof(UserRecord, umask), 0 }, { "environment", JSON_VARIANT_ARRAY, json_dispatch_environment, offsetof(UserRecord, environment), 0 }, { "timeZone", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, time_zone), JSON_SAFE }, { "preferredLanguage", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, preferred_language), JSON_SAFE }, { "niceLevel", _JSON_VARIANT_TYPE_INVALID, json_dispatch_nice, offsetof(UserRecord, nice_level), 0 }, { "resourceLimits", _JSON_VARIANT_TYPE_INVALID, json_dispatch_rlimits, offsetof(UserRecord, rlimits), 0 }, { "locked", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, locked), 0 }, { "notBeforeUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, not_before_usec), 0 }, { "notAfterUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, not_after_usec), 0 }, { "storage", JSON_VARIANT_STRING, json_dispatch_storage, offsetof(UserRecord, storage), 0 }, { "diskSize", JSON_VARIANT_UNSIGNED, json_dispatch_disk_size, offsetof(UserRecord, disk_size), 0 }, { "diskSizeRelative", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, disk_size_relative), 0 }, { "skeletonDirectory", JSON_VARIANT_STRING, json_dispatch_path, offsetof(UserRecord, skeleton_directory), 0 }, { "accessMode", JSON_VARIANT_UNSIGNED, json_dispatch_access_mode, offsetof(UserRecord, access_mode), 0 }, { "tasksMax", JSON_VARIANT_UNSIGNED, json_dispatch_tasks_or_memory_max, offsetof(UserRecord, tasks_max), 0 }, { "memoryHigh", JSON_VARIANT_UNSIGNED, json_dispatch_tasks_or_memory_max, offsetof(UserRecord, memory_high), 0 }, { "memoryMax", JSON_VARIANT_UNSIGNED, json_dispatch_tasks_or_memory_max, offsetof(UserRecord, memory_max), 0 }, { "cpuWeight", JSON_VARIANT_UNSIGNED, json_dispatch_weight, offsetof(UserRecord, cpu_weight), 0 }, { "ioWeight", JSON_VARIANT_UNSIGNED, json_dispatch_weight, offsetof(UserRecord, io_weight), 0 }, { "mountNoDevices", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, nodev), 0 }, { "mountNoSuid", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, nosuid), 0 }, { "mountNoExecute", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(UserRecord, noexec), 0 }, { "cifsDomain", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, cifs_domain), JSON_SAFE }, { "cifsUserName", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, cifs_user_name), JSON_SAFE }, { "cifsService", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, cifs_service), JSON_SAFE }, { "imagePath", JSON_VARIANT_STRING, json_dispatch_path, offsetof(UserRecord, image_path), 0 }, { "homeDirectory", JSON_VARIANT_STRING, json_dispatch_home_directory, offsetof(UserRecord, home_directory), 0 }, { "uid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(UserRecord, uid), 0 }, { "gid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(UserRecord, gid), 0 }, { "memberOf", JSON_VARIANT_ARRAY, json_dispatch_user_group_list, offsetof(UserRecord, member_of), JSON_RELAX}, { "fileSystemType", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, file_system_type), JSON_SAFE }, { "partitionUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, partition_uuid), 0 }, { "luksUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, luks_uuid), 0 }, { "fileSystemUuid", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(UserRecord, file_system_uuid), 0 }, { "luksDiscard", _JSON_VARIANT_TYPE_INVALID, json_dispatch_tristate, offsetof(UserRecord, luks_discard), 0 }, { "luksOfflineDiscard", _JSON_VARIANT_TYPE_INVALID, json_dispatch_tristate, offsetof(UserRecord, luks_offline_discard), 0 }, { "luksCipher", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_cipher), JSON_SAFE }, { "luksCipherMode", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_cipher_mode), JSON_SAFE }, { "luksVolumeKeySize", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_volume_key_size), 0 }, { "luksPbkdfHashAlgorithm", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_pbkdf_hash_algorithm), JSON_SAFE }, { "luksPbkdfType", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, luks_pbkdf_type), JSON_SAFE }, { "luksPbkdfTimeCostUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_pbkdf_time_cost_usec), 0 }, { "luksPbkdfMemoryCost", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_pbkdf_memory_cost), 0 }, { "luksPbkdfParallelThreads", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, luks_pbkdf_parallel_threads), 0 }, { "service", JSON_VARIANT_STRING, json_dispatch_string, offsetof(UserRecord, service), JSON_SAFE }, { "rateLimitIntervalUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, ratelimit_interval_usec), 0 }, { "rateLimitBurst", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, ratelimit_burst), 0 }, { "enforcePasswordPolicy", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, enforce_password_policy), 0 }, { "autoLogin", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, auto_login), 0 }, { "stopDelayUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, stop_delay_usec), 0 }, { "killProcesses", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, kill_processes), 0 }, { "passwordChangeMinUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_min_usec), 0 }, { "passwordChangeMaxUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_max_usec), 0 }, { "passwordChangeWarnUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_warn_usec), 0 }, { "passwordChangeInactiveUSec", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(UserRecord, password_change_inactive_usec), 0 }, { "passwordChangeNow", JSON_VARIANT_BOOLEAN, json_dispatch_tristate, offsetof(UserRecord, password_change_now), 0 }, { "pkcs11TokenUri", JSON_VARIANT_ARRAY, dispatch_pkcs11_uri_array, offsetof(UserRecord, pkcs11_token_uri), 0 }, { "fido2HmacCredential", JSON_VARIANT_ARRAY, dispatch_fido2_hmac_credential_array, 0, 0 }, { "recoveryKeyType", JSON_VARIANT_ARRAY, json_dispatch_strv, offsetof(UserRecord, recovery_key_type), 0 }, { "secret", JSON_VARIANT_OBJECT, dispatch_secret, 0, 0 }, { "privileged", JSON_VARIANT_OBJECT, dispatch_privileged, 0, 0 }, /* Ignore the perMachine, binding, status stuff here, and process it later, so that it overrides whatever is set above */ { "perMachine", JSON_VARIANT_ARRAY, NULL, 0, 0 }, { "binding", JSON_VARIANT_OBJECT, NULL, 0, 0 }, { "status", JSON_VARIANT_OBJECT, NULL, 0, 0 }, /* Ignore 'signature', we check it with explicit accessors instead */ { "signature", JSON_VARIANT_ARRAY, NULL, 0, 0 }, {}, }; JsonDispatchFlags json_flags = USER_RECORD_LOAD_FLAGS_TO_JSON_DISPATCH_FLAGS(load_flags); int r; assert(h); assert(!h->json); /* Note that this call will leave a half-initialized record around on failure! */ r = user_group_record_mangle(v, load_flags, &h->json, &h->mask); if (r < 0) return r; r = json_dispatch(h->json, user_dispatch_table, NULL, json_flags, h); if (r < 0) return r; /* During the parsing operation above we ignored the 'perMachine', 'binding' and 'status' fields, * since we want them to override the global options. Let's process them now. */ r = dispatch_per_machine("perMachine", json_variant_by_key(h->json, "perMachine"), json_flags, h); if (r < 0) return r; r = dispatch_binding("binding", json_variant_by_key(h->json, "binding"), json_flags, h); if (r < 0) return r; r = dispatch_status("status", json_variant_by_key(h->json, "status"), json_flags, h); if (r < 0) return r; if (FLAGS_SET(h->mask, USER_RECORD_REGULAR) && !h->user_name) return json_log(h->json, json_flags, SYNTHETIC_ERRNO(EINVAL), "User name field missing, refusing."); r = user_record_augment(h, json_flags); if (r < 0) return r; return 0; } int user_record_build(UserRecord **ret, ...) { _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; _cleanup_(user_record_unrefp) UserRecord *u = NULL; va_list ap; int r; assert(ret); va_start(ap, ret); r = json_buildv(&v, ap); va_end(ap); if (r < 0) return r; u = user_record_new(); if (!u) return -ENOMEM; r = user_record_load(u, v, USER_RECORD_LOAD_FULL); if (r < 0) return r; *ret = TAKE_PTR(u); return 0; } const char *user_record_user_name_and_realm(UserRecord *h) { assert(h); /* Return the pre-initialized joined string if it is defined */ if (h->user_name_and_realm_auto) return h->user_name_and_realm_auto; /* If it's not defined then we cannot have a realm */ assert(!h->realm); return h->user_name; } UserStorage user_record_storage(UserRecord *h) { assert(h); if (h->storage >= 0) return h->storage; return USER_CLASSIC; } const char *user_record_file_system_type(UserRecord *h) { assert(h); return h->file_system_type ?: "btrfs"; } const char *user_record_skeleton_directory(UserRecord *h) { assert(h); return h->skeleton_directory ?: "/etc/skel"; } mode_t user_record_access_mode(UserRecord *h) { assert(h); return h->access_mode != (mode_t) -1 ? h->access_mode : 0700; } const char* user_record_home_directory(UserRecord *h) { assert(h); if (h->home_directory) return h->home_directory; if (h->home_directory_auto) return h->home_directory_auto; /* The root user is special, hence be special about it */ if (streq_ptr(h->user_name, "root")) return "/root"; return "/"; } const char *user_record_image_path(UserRecord *h) { assert(h); if (h->image_path) return h->image_path; if (h->image_path_auto) return h->image_path_auto; return IN_SET(user_record_storage(h), USER_CLASSIC, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT) ? user_record_home_directory(h) : NULL; } const char *user_record_cifs_user_name(UserRecord *h) { assert(h); return h->cifs_user_name ?: h->user_name; } unsigned long user_record_mount_flags(UserRecord *h) { assert(h); return (h->nosuid ? MS_NOSUID : 0) | (h->noexec ? MS_NOEXEC : 0) | (h->nodev ? MS_NODEV : 0); } const char *user_record_shell(UserRecord *h) { assert(h); if (h->shell) return h->shell; if (streq_ptr(h->user_name, "root")) return "/bin/sh"; if (user_record_disposition(h) == USER_REGULAR) return "/bin/bash"; return NOLOGIN; } const char *user_record_real_name(UserRecord *h) { assert(h); return h->real_name ?: h->user_name; } bool user_record_luks_discard(UserRecord *h) { const char *ip; assert(h); if (h->luks_discard >= 0) return h->luks_discard; ip = user_record_image_path(h); if (!ip) return false; /* Use discard by default if we are referring to a real block device, but not when operating on a * loopback device. We want to optimize for SSD and flash storage after all, but we should be careful * when storing stuff on top of regular file systems in loopback files as doing discard then would * mean thin provisioning and we should not do that willy-nilly since it means we'll risk EIO later * on should the disk space to back our file systems not be available. */ return path_startswith(ip, "/dev/"); } bool user_record_luks_offline_discard(UserRecord *h) { const char *ip; assert(h); if (h->luks_offline_discard >= 0) return h->luks_offline_discard; /* Discard while we are logged out should generally be a good idea, except when operating directly on * physical media, where we should just bind it to the online discard mode. */ ip = user_record_image_path(h); if (!ip) return false; if (path_startswith(ip, "/dev/")) return user_record_luks_discard(h); return true; } const char *user_record_luks_cipher(UserRecord *h) { assert(h); return h->luks_cipher ?: "aes"; } const char *user_record_luks_cipher_mode(UserRecord *h) { assert(h); return h->luks_cipher_mode ?: "xts-plain64"; } uint64_t user_record_luks_volume_key_size(UserRecord *h) { assert(h); /* We return a value here that can be cast without loss into size_t which is what libcrypsetup expects */ if (h->luks_volume_key_size == UINT64_MAX) return 256 / 8; return MIN(h->luks_volume_key_size, SIZE_MAX); } const char* user_record_luks_pbkdf_type(UserRecord *h) { assert(h); return h->luks_pbkdf_type ?: "argon2i"; } uint64_t user_record_luks_pbkdf_time_cost_usec(UserRecord *h) { assert(h); /* Returns a value with ms granularity, since that's what libcryptsetup expects */ if (h->luks_pbkdf_time_cost_usec == UINT64_MAX) return 500 * USEC_PER_MSEC; /* We default to 500ms, in contrast to libcryptsetup's 2s, which is just awfully slow on every login */ return MIN(DIV_ROUND_UP(h->luks_pbkdf_time_cost_usec, USEC_PER_MSEC), UINT32_MAX) * USEC_PER_MSEC; } uint64_t user_record_luks_pbkdf_memory_cost(UserRecord *h) { assert(h); /* Returns a value with kb granularity, since that's what libcryptsetup expects */ if (h->luks_pbkdf_memory_cost == UINT64_MAX) return 64*1024*1024; /* We default to 64M, since this should work on smaller systems too */ return MIN(DIV_ROUND_UP(h->luks_pbkdf_memory_cost, 1024), UINT32_MAX) * 1024; } uint64_t user_record_luks_pbkdf_parallel_threads(UserRecord *h) { assert(h); if (h->luks_pbkdf_memory_cost == UINT64_MAX) return 1; /* We default to 1, since this should work on smaller systems too */ return MIN(h->luks_pbkdf_parallel_threads, UINT32_MAX); } const char *user_record_luks_pbkdf_hash_algorithm(UserRecord *h) { assert(h); return h->luks_pbkdf_hash_algorithm ?: "sha512"; } gid_t user_record_gid(UserRecord *h) { assert(h); if (gid_is_valid(h->gid)) return h->gid; return (gid_t) h->uid; } UserDisposition user_record_disposition(UserRecord *h) { assert(h); if (h->disposition >= 0) return h->disposition; /* If not declared, derive from UID */ if (!uid_is_valid(h->uid)) return _USER_DISPOSITION_INVALID; if (h->uid == 0 || h->uid == UID_NOBODY) return USER_INTRINSIC; if (uid_is_system(h->uid)) return USER_SYSTEM; if (uid_is_dynamic(h->uid)) return USER_DYNAMIC; if (uid_is_container(h->uid)) return USER_CONTAINER; if (h->uid > INT32_MAX) return USER_RESERVED; return USER_REGULAR; } int user_record_removable(UserRecord *h) { UserStorage storage; assert(h); if (h->removable >= 0) return h->removable; /* Refuse to decide for classic records */ storage = user_record_storage(h); if (h->storage < 0 || h->storage == USER_CLASSIC) return -1; /* For now consider only LUKS home directories with a reference by path as removable */ return storage == USER_LUKS && path_startswith(user_record_image_path(h), "/dev/"); } uint64_t user_record_ratelimit_interval_usec(UserRecord *h) { assert(h); if (h->ratelimit_interval_usec == UINT64_MAX) return DEFAULT_RATELIMIT_INTERVAL_USEC; return h->ratelimit_interval_usec; } uint64_t user_record_ratelimit_burst(UserRecord *h) { assert(h); if (h->ratelimit_burst == UINT64_MAX) return DEFAULT_RATELIMIT_BURST; return h->ratelimit_burst; } bool user_record_can_authenticate(UserRecord *h) { assert(h); /* Returns true if there's some form of property configured that the user can authenticate against */ if (h->n_pkcs11_encrypted_key > 0) return true; if (h->n_fido2_hmac_salt > 0) return true; return !strv_isempty(h->hashed_password); } uint64_t user_record_ratelimit_next_try(UserRecord *h) { assert(h); /* Calculates when the it's possible to login next. Returns: * * UINT64_MAX → Nothing known * 0 → Right away * Any other → Next time in CLOCK_REALTIME in usec (which could be in the past) */ if (h->ratelimit_begin_usec == UINT64_MAX || h->ratelimit_count == UINT64_MAX) return UINT64_MAX; if (h->ratelimit_begin_usec > now(CLOCK_REALTIME)) /* If the ratelimit time is in the future, then * the local clock is probably incorrect. Let's * not refuse login then. */ return UINT64_MAX; if (h->ratelimit_count < user_record_ratelimit_burst(h)) return 0; return usec_add(h->ratelimit_begin_usec, user_record_ratelimit_interval_usec(h)); } bool user_record_equal(UserRecord *a, UserRecord *b) { assert(a); assert(b); /* We assume that when a record is modified its JSON data is updated at the same time, hence it's * sufficient to compare the JSON data. */ return json_variant_equal(a->json, b->json); } bool user_record_compatible(UserRecord *a, UserRecord *b) { assert(a); assert(b); /* If either lacks the regular section, we can't really decide, let's hence say they are * incompatible. */ if (!(a->mask & b->mask & USER_RECORD_REGULAR)) return false; return streq_ptr(a->user_name, b->user_name) && streq_ptr(a->realm, b->realm); } int user_record_compare_last_change(UserRecord *a, UserRecord *b) { assert(a); assert(b); if (a->last_change_usec == b->last_change_usec) return 0; /* Always consider a record with a timestamp newer than one without */ if (a->last_change_usec == UINT64_MAX) return -1; if (b->last_change_usec == UINT64_MAX) return 1; return CMP(a->last_change_usec, b->last_change_usec); } int user_record_clone(UserRecord *h, UserRecordLoadFlags flags, UserRecord **ret) { _cleanup_(user_record_unrefp) UserRecord *c = NULL; int r; assert(h); assert(ret); c = user_record_new(); if (!c) return -ENOMEM; r = user_record_load(c, h->json, flags); if (r < 0) return r; *ret = TAKE_PTR(c); return 0; } int user_record_masked_equal(UserRecord *a, UserRecord *b, UserRecordMask mask) { _cleanup_(user_record_unrefp) UserRecord *x = NULL, *y = NULL; int r; assert(a); assert(b); /* Compares the two records, but ignores anything not listed in the specified mask */ if ((a->mask & ~mask) != 0) { r = user_record_clone(a, USER_RECORD_ALLOW(mask) | USER_RECORD_STRIP(~mask & _USER_RECORD_MASK_MAX), &x); if (r < 0) return r; a = x; } if ((b->mask & ~mask) != 0) { r = user_record_clone(b, USER_RECORD_ALLOW(mask) | USER_RECORD_STRIP(~mask & _USER_RECORD_MASK_MAX), &y); if (r < 0) return r; b = y; } return user_record_equal(a, b); } int user_record_test_blocked(UserRecord *h) { usec_t n; /* Checks whether access to the specified user shall be allowed at the moment. Returns: * * -ESTALE: Record is from the future * -ENOLCK: Record is blocked * -EL2HLT: Record is not valid yet * -EL3HLT: Record is not valid anymore * */ assert(h); if (h->locked > 0) return -ENOLCK; n = now(CLOCK_REALTIME); if (h->not_before_usec != UINT64_MAX && n < h->not_before_usec) return -EL2HLT; if (h->not_after_usec != UINT64_MAX && n > h->not_after_usec) return -EL3HLT; if (h->last_change_usec != UINT64_MAX && h->last_change_usec > n) /* Complain during log-ins when the record is from the future */ return -ESTALE; return 0; } int user_record_test_password_change_required(UserRecord *h) { bool change_permitted; usec_t n; assert(h); /* Checks whether the user must change the password when logging in -EKEYREVOKED: Change password now because admin said so -EOWNERDEAD: Change password now because it expired -EKEYREJECTED: Password is expired, no changing is allowed -EKEYEXPIRED: Password is about to expire, warn user -ENETDOWN: Record has expiration info but no password change timestamp -EROFS: No password change required nor permitted -ESTALE: RTC likely incorrect, last password change is in the future 0: No password change required, but permitted */ /* If a password change request has been set explicitly, it overrides everything */ if (h->password_change_now > 0) return -EKEYREVOKED; n = now(CLOCK_REALTIME); /* Password change in the future? Then our RTC is likely incorrect */ if (h->last_password_change_usec != UINT64_MAX && h->last_password_change_usec > n && (h->password_change_min_usec != UINT64_MAX || h->password_change_max_usec != UINT64_MAX || h->password_change_inactive_usec != UINT64_MAX)) return -ESTALE; /* Then, let's check if password changing is currently allowed at all */ if (h->password_change_min_usec != UINT64_MAX) { /* Expiry configured but no password change timestamp known? */ if (h->last_password_change_usec == UINT64_MAX) return -ENETDOWN; if (h->password_change_min_usec >= UINT64_MAX - h->last_password_change_usec) change_permitted = false; else change_permitted = n >= h->last_password_change_usec + h->password_change_min_usec; } else change_permitted = true; /* Let's check whether the password has expired. */ if (!(h->password_change_max_usec == UINT64_MAX || h->password_change_max_usec >= UINT64_MAX - h->last_password_change_usec)) { uint64_t change_before; /* Expiry configured but no password change timestamp known? */ if (h->last_password_change_usec == UINT64_MAX) return -ENETDOWN; /* Password is in inactive phase? */ if (h->password_change_inactive_usec != UINT64_MAX && h->password_change_inactive_usec < UINT64_MAX - h->password_change_max_usec) { usec_t added; added = h->password_change_inactive_usec + h->password_change_max_usec; if (added < UINT64_MAX - h->last_password_change_usec && n >= h->last_password_change_usec + added) return -EKEYREJECTED; } /* Password needs to be changed now? */ change_before = h->last_password_change_usec + h->password_change_max_usec; if (n >= change_before) return change_permitted ? -EOWNERDEAD : -EKEYREJECTED; /* Warn user? */ if (h->password_change_warn_usec != UINT64_MAX && (change_before < h->password_change_warn_usec || n >= change_before - h->password_change_warn_usec)) return change_permitted ? -EKEYEXPIRED : -EROFS; } /* No password changing necessary */ return change_permitted ? 0 : -EROFS; } static const char* const user_storage_table[_USER_STORAGE_MAX] = { [USER_CLASSIC] = "classic", [USER_LUKS] = "luks", [USER_DIRECTORY] = "directory", [USER_SUBVOLUME] = "subvolume", [USER_FSCRYPT] = "fscrypt", [USER_CIFS] = "cifs", }; DEFINE_STRING_TABLE_LOOKUP(user_storage, UserStorage); static const char* const user_disposition_table[_USER_DISPOSITION_MAX] = { [USER_INTRINSIC] = "intrinsic", [USER_SYSTEM] = "system", [USER_DYNAMIC] = "dynamic", [USER_REGULAR] = "regular", [USER_CONTAINER] = "container", [USER_RESERVED] = "reserved", }; DEFINE_STRING_TABLE_LOOKUP(user_disposition, UserDisposition);