/* SPDX-License-Identifier: LGPL-2.1-or-later */ #pragma once #include #include #include "sd-id128.h" #include "json.h" #include "missing_resource.h" #include "time-util.h" /* But some limits on disk sizes: not less than 5M, not more than 5T */ #define USER_DISK_SIZE_MIN (UINT64_C(5)*1024*1024) #define USER_DISK_SIZE_MAX (UINT64_C(5)*1024*1024*1024*1024) /* The default disk size to use when nothing else is specified, relative to free disk space */ #define USER_DISK_SIZE_DEFAULT_PERCENT 85 bool uid_is_system(uid_t uid); bool gid_is_system(gid_t gid); static inline bool uid_is_dynamic(uid_t uid) { return DYNAMIC_UID_MIN <= uid && uid <= DYNAMIC_UID_MAX; } static inline bool gid_is_dynamic(gid_t gid) { return uid_is_dynamic((uid_t) gid); } static inline bool uid_is_container(uid_t uid) { return CONTAINER_UID_BASE_MIN <= uid && uid <= CONTAINER_UID_BASE_MAX; } static inline bool gid_is_container(gid_t gid) { return uid_is_container((uid_t) gid); } typedef struct UGIDAllocationRange { uid_t system_alloc_uid_min; uid_t system_uid_max; gid_t system_alloc_gid_min; gid_t system_gid_max; } UGIDAllocationRange; int read_login_defs(UGIDAllocationRange *ret_defs, const char *path, const char *root); const UGIDAllocationRange *acquire_ugid_allocation_range(void); typedef enum UserDisposition { USER_INTRINSIC, /* root and nobody */ USER_SYSTEM, /* statically allocated users for system services */ USER_DYNAMIC, /* dynamically allocated users for system services */ USER_REGULAR, /* regular (typically human users) */ USER_CONTAINER, /* UID ranges allocated for container uses */ USER_RESERVED, /* Range above 2^31 */ _USER_DISPOSITION_MAX, _USER_DISPOSITION_INVALID = -EINVAL, } UserDisposition; typedef enum UserHomeStorage { USER_CLASSIC, USER_LUKS, USER_DIRECTORY, /* A directory, and a .identity file in it, which USER_CLASSIC lacks */ USER_SUBVOLUME, USER_FSCRYPT, USER_CIFS, _USER_STORAGE_MAX, _USER_STORAGE_INVALID = -EINVAL, } UserStorage; typedef enum UserRecordMask { /* The various sections an identity record may have, as bit mask */ USER_RECORD_REGULAR = 1U << 0, USER_RECORD_SECRET = 1U << 1, USER_RECORD_PRIVILEGED = 1U << 2, USER_RECORD_PER_MACHINE = 1U << 3, USER_RECORD_BINDING = 1U << 4, USER_RECORD_STATUS = 1U << 5, USER_RECORD_SIGNATURE = 1U << 6, _USER_RECORD_MASK_MAX = (1U << 7)-1 } UserRecordMask; typedef enum UserRecordLoadFlags { /* A set of flags used while loading a user record from JSON data. We leave the lower 6 bits free, * just as a safety precaution so that we can detect borked conversions between UserRecordMask and * UserRecordLoadFlags. */ /* What to require */ USER_RECORD_REQUIRE_REGULAR = USER_RECORD_REGULAR << 7, USER_RECORD_REQUIRE_SECRET = USER_RECORD_SECRET << 7, USER_RECORD_REQUIRE_PRIVILEGED = USER_RECORD_PRIVILEGED << 7, USER_RECORD_REQUIRE_PER_MACHINE = USER_RECORD_PER_MACHINE << 7, USER_RECORD_REQUIRE_BINDING = USER_RECORD_BINDING << 7, USER_RECORD_REQUIRE_STATUS = USER_RECORD_STATUS << 7, USER_RECORD_REQUIRE_SIGNATURE = USER_RECORD_SIGNATURE << 7, /* What to allow */ USER_RECORD_ALLOW_REGULAR = USER_RECORD_REGULAR << 14, USER_RECORD_ALLOW_SECRET = USER_RECORD_SECRET << 14, USER_RECORD_ALLOW_PRIVILEGED = USER_RECORD_PRIVILEGED << 14, USER_RECORD_ALLOW_PER_MACHINE = USER_RECORD_PER_MACHINE << 14, USER_RECORD_ALLOW_BINDING = USER_RECORD_BINDING << 14, USER_RECORD_ALLOW_STATUS = USER_RECORD_STATUS << 14, USER_RECORD_ALLOW_SIGNATURE = USER_RECORD_SIGNATURE << 14, /* What to strip */ USER_RECORD_STRIP_REGULAR = USER_RECORD_REGULAR << 21, USER_RECORD_STRIP_SECRET = USER_RECORD_SECRET << 21, USER_RECORD_STRIP_PRIVILEGED = USER_RECORD_PRIVILEGED << 21, USER_RECORD_STRIP_PER_MACHINE = USER_RECORD_PER_MACHINE << 21, USER_RECORD_STRIP_BINDING = USER_RECORD_BINDING << 21, USER_RECORD_STRIP_STATUS = USER_RECORD_STATUS << 21, USER_RECORD_STRIP_SIGNATURE = USER_RECORD_SIGNATURE << 21, /* Some special combinations that deserve explicit names */ USER_RECORD_LOAD_FULL = USER_RECORD_REQUIRE_REGULAR | USER_RECORD_ALLOW_SECRET | USER_RECORD_ALLOW_PRIVILEGED | USER_RECORD_ALLOW_PER_MACHINE | USER_RECORD_ALLOW_BINDING | USER_RECORD_ALLOW_STATUS | USER_RECORD_ALLOW_SIGNATURE, USER_RECORD_LOAD_REFUSE_SECRET = USER_RECORD_REQUIRE_REGULAR | USER_RECORD_ALLOW_PRIVILEGED | USER_RECORD_ALLOW_PER_MACHINE | USER_RECORD_ALLOW_BINDING | USER_RECORD_ALLOW_STATUS | USER_RECORD_ALLOW_SIGNATURE, USER_RECORD_LOAD_MASK_SECRET = USER_RECORD_REQUIRE_REGULAR | USER_RECORD_ALLOW_PRIVILEGED | USER_RECORD_ALLOW_PER_MACHINE | USER_RECORD_ALLOW_BINDING | USER_RECORD_ALLOW_STATUS | USER_RECORD_ALLOW_SIGNATURE | USER_RECORD_STRIP_SECRET, USER_RECORD_EXTRACT_SECRET = USER_RECORD_REQUIRE_SECRET | USER_RECORD_STRIP_REGULAR | USER_RECORD_STRIP_PRIVILEGED | USER_RECORD_STRIP_PER_MACHINE | USER_RECORD_STRIP_BINDING | USER_RECORD_STRIP_STATUS | USER_RECORD_STRIP_SIGNATURE, USER_RECORD_LOAD_SIGNABLE = USER_RECORD_REQUIRE_REGULAR | USER_RECORD_ALLOW_PRIVILEGED | USER_RECORD_ALLOW_PER_MACHINE, USER_RECORD_EXTRACT_SIGNABLE = USER_RECORD_LOAD_SIGNABLE | USER_RECORD_STRIP_SECRET | USER_RECORD_STRIP_BINDING | USER_RECORD_STRIP_STATUS | USER_RECORD_STRIP_SIGNATURE, USER_RECORD_LOAD_EMBEDDED = USER_RECORD_REQUIRE_REGULAR | USER_RECORD_ALLOW_PRIVILEGED | USER_RECORD_ALLOW_PER_MACHINE | USER_RECORD_ALLOW_SIGNATURE, USER_RECORD_EXTRACT_EMBEDDED = USER_RECORD_LOAD_EMBEDDED | USER_RECORD_STRIP_SECRET | USER_RECORD_STRIP_BINDING | USER_RECORD_STRIP_STATUS, /* Whether to log about loader errors beyond LOG_DEBUG */ USER_RECORD_LOG = 1U << 28, /* Whether to ignore errors and load what we can */ USER_RECORD_PERMISSIVE = 1U << 29, /* Whether an empty record is OK */ USER_RECORD_EMPTY_OK = 1U << 30, } UserRecordLoadFlags; static inline UserRecordLoadFlags USER_RECORD_REQUIRE(UserRecordMask m) { assert((m & ~_USER_RECORD_MASK_MAX) == 0); return m << 7; } static inline UserRecordLoadFlags USER_RECORD_ALLOW(UserRecordMask m) { assert((m & ~_USER_RECORD_MASK_MAX) == 0); return m << 14; } static inline UserRecordLoadFlags USER_RECORD_STRIP(UserRecordMask m) { assert((m & ~_USER_RECORD_MASK_MAX) == 0); return m << 21; } static inline UserRecordMask USER_RECORD_REQUIRE_MASK(UserRecordLoadFlags f) { return (f >> 7) & _USER_RECORD_MASK_MAX; } static inline UserRecordMask USER_RECORD_ALLOW_MASK(UserRecordLoadFlags f) { return ((f >> 14) & _USER_RECORD_MASK_MAX) | USER_RECORD_REQUIRE_MASK(f); } static inline UserRecordMask USER_RECORD_STRIP_MASK(UserRecordLoadFlags f) { return (f >> 21) & _USER_RECORD_MASK_MAX; } static inline JsonDispatchFlags USER_RECORD_LOAD_FLAGS_TO_JSON_DISPATCH_FLAGS(UserRecordLoadFlags flags) { return (FLAGS_SET(flags, USER_RECORD_LOG) ? JSON_LOG : 0) | (FLAGS_SET(flags, USER_RECORD_PERMISSIVE) ? JSON_PERMISSIVE : 0); } typedef struct Pkcs11EncryptedKey { /* The encrypted passphrase, which can be decrypted with the private key indicated below */ void *data; size_t size; /* Where to find the private key to decrypt the encrypted passphrase above */ char *uri; /* What to test the decrypted passphrase against to allow access (classic UNIX password hash). Note * that the decrypted passphrase is also used for unlocking LUKS and fscrypt, and if the account is * backed by LUKS or fscrypt the hashed password is only an additional layer of authentication, not * the only. */ char *hashed_password; } Pkcs11EncryptedKey; typedef struct Fido2HmacCredential { void *id; size_t size; } Fido2HmacCredential; typedef struct Fido2HmacSalt { /* The FIDO2 Cridential ID to use */ Fido2HmacCredential credential; /* The FIDO2 salt value */ void *salt; size_t salt_size; /* What to test the hashed salt value against, usually UNIX password hash here. */ char *hashed_password; /* Whether the 'up', 'uv', 'clientPin' features are enabled. */ int uv, up, client_pin; } Fido2HmacSalt; typedef struct RecoveryKey { /* The type of recovery key, must be "modhex64" right now */ char *type; /* A UNIX password hash of the normalized form of modhex64 */ char *hashed_password; } RecoveryKey; typedef struct UserRecord { /* The following three fields are not part of the JSON record */ unsigned n_ref; UserRecordMask mask; bool incomplete; /* incomplete due to security restrictions. */ char *user_name; char *realm; char *user_name_and_realm_auto; /* the user_name field concatenated with '@' and the realm, if the latter is defined */ char *real_name; char *email_address; char *password_hint; char *icon_name; char *location; UserDisposition disposition; uint64_t last_change_usec; uint64_t last_password_change_usec; char *shell; mode_t umask; char **environment; char *time_zone; char *preferred_language; int nice_level; struct rlimit *rlimits[_RLIMIT_MAX]; int locked; /* prohibit activation in general */ uint64_t not_before_usec; /* prohibit activation before this unix time */ uint64_t not_after_usec; /* prohibit activation after this unix time */ UserStorage storage; uint64_t disk_size; uint64_t disk_size_relative; /* Disk size, relative to the free bytes of the medium, normalized to UINT32_MAX = 100% */ char *skeleton_directory; mode_t access_mode; uint64_t tasks_max; uint64_t memory_high; uint64_t memory_max; uint64_t cpu_weight; uint64_t io_weight; bool nosuid; bool nodev; bool noexec; char **hashed_password; char **ssh_authorized_keys; char **password; char **token_pin; char *cifs_domain; char *cifs_user_name; char *cifs_service; char *image_path; char *image_path_auto; /* when none is configured explicitly, this is where we place the implicit image */ char *home_directory; char *home_directory_auto; /* when none is set explicitly, this is where we place the implicit home directory */ uid_t uid; gid_t gid; char **member_of; char *file_system_type; sd_id128_t partition_uuid; sd_id128_t luks_uuid; sd_id128_t file_system_uuid; int luks_discard; int luks_offline_discard; char *luks_cipher; char *luks_cipher_mode; uint64_t luks_volume_key_size; char *luks_pbkdf_hash_algorithm; char *luks_pbkdf_type; uint64_t luks_pbkdf_time_cost_usec; uint64_t luks_pbkdf_memory_cost; uint64_t luks_pbkdf_parallel_threads; uint64_t disk_usage; uint64_t disk_free; uint64_t disk_ceiling; uint64_t disk_floor; char *state; char *service; int signed_locally; uint64_t good_authentication_counter; uint64_t bad_authentication_counter; uint64_t last_good_authentication_usec; uint64_t last_bad_authentication_usec; uint64_t ratelimit_begin_usec; uint64_t ratelimit_count; uint64_t ratelimit_interval_usec; uint64_t ratelimit_burst; int removable; int enforce_password_policy; int auto_login; uint64_t stop_delay_usec; /* How long to leave systemd --user around on log-out */ int kill_processes; /* Whether to kill user processes forcibly on log-out */ /* The following exist mostly so that we can cover the full /etc/shadow set of fields */ uint64_t password_change_min_usec; /* maps to .sp_min */ uint64_t password_change_max_usec; /* maps to .sp_max */ uint64_t password_change_warn_usec; /* maps to .sp_warn */ uint64_t password_change_inactive_usec; /* maps to .sp_inact */ int password_change_now; /* Require a password change immediately on next login (.sp_lstchg = 0) */ char **pkcs11_token_uri; Pkcs11EncryptedKey *pkcs11_encrypted_key; size_t n_pkcs11_encrypted_key; int pkcs11_protected_authentication_path_permitted; Fido2HmacCredential *fido2_hmac_credential; size_t n_fido2_hmac_credential; Fido2HmacSalt *fido2_hmac_salt; size_t n_fido2_hmac_salt; int fido2_user_presence_permitted; int fido2_user_verification_permitted; char **recovery_key_type; RecoveryKey *recovery_key; size_t n_recovery_key; JsonVariant *json; } UserRecord; UserRecord* user_record_new(void); UserRecord* user_record_ref(UserRecord *h); UserRecord* user_record_unref(UserRecord *h); DEFINE_TRIVIAL_CLEANUP_FUNC(UserRecord*, user_record_unref); int user_record_load(UserRecord *h, JsonVariant *v, UserRecordLoadFlags flags); int user_record_build(UserRecord **ret, ...); const char *user_record_user_name_and_realm(UserRecord *h); UserStorage user_record_storage(UserRecord *h); const char *user_record_file_system_type(UserRecord *h); const char *user_record_skeleton_directory(UserRecord *h); mode_t user_record_access_mode(UserRecord *h); const char *user_record_home_directory(UserRecord *h); const char *user_record_image_path(UserRecord *h); unsigned long user_record_mount_flags(UserRecord *h); const char *user_record_cifs_user_name(UserRecord *h); const char *user_record_shell(UserRecord *h); const char *user_record_real_name(UserRecord *h); bool user_record_luks_discard(UserRecord *h); bool user_record_luks_offline_discard(UserRecord *h); const char *user_record_luks_cipher(UserRecord *h); const char *user_record_luks_cipher_mode(UserRecord *h); uint64_t user_record_luks_volume_key_size(UserRecord *h); const char* user_record_luks_pbkdf_type(UserRecord *h); usec_t user_record_luks_pbkdf_time_cost_usec(UserRecord *h); uint64_t user_record_luks_pbkdf_memory_cost(UserRecord *h); uint64_t user_record_luks_pbkdf_parallel_threads(UserRecord *h); const char *user_record_luks_pbkdf_hash_algorithm(UserRecord *h); gid_t user_record_gid(UserRecord *h); UserDisposition user_record_disposition(UserRecord *h); int user_record_removable(UserRecord *h); usec_t user_record_ratelimit_interval_usec(UserRecord *h); uint64_t user_record_ratelimit_burst(UserRecord *h); bool user_record_can_authenticate(UserRecord *h); int user_record_build_image_path(UserStorage storage, const char *user_name_and_realm, char **ret); bool user_record_equal(UserRecord *a, UserRecord *b); bool user_record_compatible(UserRecord *a, UserRecord *b); int user_record_compare_last_change(UserRecord *a, UserRecord *b); usec_t user_record_ratelimit_next_try(UserRecord *h); int user_record_clone(UserRecord *h, UserRecordLoadFlags flags, UserRecord **ret); int user_record_masked_equal(UserRecord *a, UserRecord *b, UserRecordMask mask); int user_record_test_blocked(UserRecord *h); int user_record_test_password_change_required(UserRecord *h); /* The following six are user by group-record.c, that's why we export them here */ int json_dispatch_realm(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata); int json_dispatch_gecos(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata); int json_dispatch_user_group_list(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata); int json_dispatch_user_disposition(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata); int per_machine_id_match(JsonVariant *ids, JsonDispatchFlags flags); int per_machine_hostname_match(JsonVariant *hns, JsonDispatchFlags flags); int user_group_record_mangle(JsonVariant *v, UserRecordLoadFlags load_flags, JsonVariant **ret_variant, UserRecordMask *ret_mask); const char* user_storage_to_string(UserStorage t) _const_; UserStorage user_storage_from_string(const char *s) _pure_; const char* user_disposition_to_string(UserDisposition t) _const_; UserDisposition user_disposition_from_string(const char *s) _pure_;