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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "group-record.h"
#include "homed-varlink.h"
#include "strv.h"
#include "user-record-util.h"
#include "user-record.h"
#include "user-util.h"
#include "format-util.h"
typedef struct LookupParameters {
const char *user_name;
const char *group_name;
union {
uid_t uid;
gid_t gid;
};
const char *service;
} LookupParameters;
static bool client_is_trusted(Varlink *link, Home *h) {
uid_t peer_uid;
int r;
assert(link);
assert(h);
r = varlink_get_peer_uid(link, &peer_uid);
if (r < 0) {
log_debug_errno(r, "Unable to query peer UID, ignoring: %m");
return false;
}
return peer_uid == 0 || peer_uid == h->uid;
}
static int build_user_json(Home *h, bool trusted, JsonVariant **ret) {
_cleanup_(user_record_unrefp) UserRecord *augmented = NULL;
UserRecordLoadFlags flags;
int r;
assert(h);
assert(ret);
flags = USER_RECORD_REQUIRE_REGULAR|USER_RECORD_ALLOW_PER_MACHINE|USER_RECORD_ALLOW_BINDING|USER_RECORD_STRIP_SECRET|USER_RECORD_ALLOW_STATUS|USER_RECORD_ALLOW_SIGNATURE|USER_RECORD_PERMISSIVE;
if (trusted)
flags |= USER_RECORD_ALLOW_PRIVILEGED;
else
flags |= USER_RECORD_STRIP_PRIVILEGED;
r = home_augment_status(h, flags, &augmented);
if (r < 0)
return r;
return json_build(ret, JSON_BUILD_OBJECT(
JSON_BUILD_PAIR("record", JSON_BUILD_VARIANT(augmented->json)),
JSON_BUILD_PAIR("incomplete", JSON_BUILD_BOOLEAN(augmented->incomplete))));
}
static bool home_user_match_lookup_parameters(LookupParameters *p, Home *h) {
assert(p);
assert(h);
if (p->user_name && !streq(p->user_name, h->user_name))
return false;
if (uid_is_valid(p->uid) && h->uid != p->uid)
return false;
return true;
}
int vl_method_get_user_record(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
static const JsonDispatch dispatch_table[] = {
{ "uid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(LookupParameters, uid), 0 },
{ "userName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, user_name), JSON_SAFE },
{ "service", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, service), 0 },
{}
};
_cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
LookupParameters p = {
.uid = UID_INVALID,
};
Manager *m = ASSERT_PTR(userdata);
bool trusted;
Home *h;
int r;
assert(parameters);
r = json_dispatch(parameters, dispatch_table, NULL, 0, &p);
if (r < 0)
return r;
if (!streq_ptr(p.service, m->userdb_service))
return varlink_error(link, "io.systemd.UserDatabase.BadService", NULL);
if (uid_is_valid(p.uid))
h = hashmap_get(m->homes_by_uid, UID_TO_PTR(p.uid));
else if (p.user_name)
h = hashmap_get(m->homes_by_name, p.user_name);
else {
/* If neither UID nor name was specified, then dump all homes. Do so with varlink_notify()
* for all entries but the last, so that clients can stream the results, and easily process
* them piecemeal. */
HASHMAP_FOREACH(h, m->homes_by_name) {
if (!home_user_match_lookup_parameters(&p, h))
continue;
if (v) {
/* An entry set from the previous iteration? Then send it now */
r = varlink_notify(link, v);
if (r < 0)
return r;
v = json_variant_unref(v);
}
trusted = client_is_trusted(link, h);
r = build_user_json(h, trusted, &v);
if (r < 0)
return r;
}
if (!v)
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
return varlink_reply(link, v);
}
if (!h)
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
if (!home_user_match_lookup_parameters(&p, h))
return varlink_error(link, "io.systemd.UserDatabase.ConflictingRecordFound", NULL);
trusted = client_is_trusted(link, h);
r = build_user_json(h, trusted, &v);
if (r < 0)
return r;
return varlink_reply(link, v);
}
static int build_group_json(Home *h, JsonVariant **ret) {
_cleanup_(group_record_unrefp) GroupRecord *g = NULL;
int r;
assert(h);
assert(ret);
g = group_record_new();
if (!g)
return -ENOMEM;
r = group_record_synthesize(g, h->record);
if (r < 0)
return r;
assert(!FLAGS_SET(g->mask, USER_RECORD_SECRET));
assert(!FLAGS_SET(g->mask, USER_RECORD_PRIVILEGED));
return json_build(ret,
JSON_BUILD_OBJECT(
JSON_BUILD_PAIR("record", JSON_BUILD_VARIANT(g->json))));
}
static bool home_group_match_lookup_parameters(LookupParameters *p, Home *h) {
assert(p);
assert(h);
if (p->group_name && !streq(h->user_name, p->group_name))
return false;
if (gid_is_valid(p->gid) && h->uid != (uid_t) p->gid)
return false;
return true;
}
int vl_method_get_group_record(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
static const JsonDispatch dispatch_table[] = {
{ "gid", JSON_VARIANT_UNSIGNED, json_dispatch_uid_gid, offsetof(LookupParameters, gid), 0 },
{ "groupName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, group_name), JSON_SAFE },
{ "service", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, service), 0 },
{}
};
_cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
LookupParameters p = {
.gid = GID_INVALID,
};
Manager *m = ASSERT_PTR(userdata);
Home *h;
int r;
assert(parameters);
r = json_dispatch(parameters, dispatch_table, NULL, 0, &p);
if (r < 0)
return r;
if (!streq_ptr(p.service, m->userdb_service))
return varlink_error(link, "io.systemd.UserDatabase.BadService", NULL);
if (gid_is_valid(p.gid))
h = hashmap_get(m->homes_by_uid, UID_TO_PTR((uid_t) p.gid));
else if (p.group_name)
h = hashmap_get(m->homes_by_name, p.group_name);
else {
HASHMAP_FOREACH(h, m->homes_by_name) {
if (!home_group_match_lookup_parameters(&p, h))
continue;
if (v) {
r = varlink_notify(link, v);
if (r < 0)
return r;
v = json_variant_unref(v);
}
r = build_group_json(h, &v);
if (r < 0)
return r;
}
if (!v)
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
return varlink_reply(link, v);
}
if (!h)
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
if (!home_group_match_lookup_parameters(&p, h))
return varlink_error(link, "io.systemd.UserDatabase.ConflictingRecordFound", NULL);
r = build_group_json(h, &v);
if (r < 0)
return r;
return varlink_reply(link, v);
}
int vl_method_get_memberships(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
static const JsonDispatch dispatch_table[] = {
{ "userName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, user_name), JSON_SAFE },
{ "groupName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, group_name), JSON_SAFE },
{ "service", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(LookupParameters, service), 0 },
{}
};
Manager *m = ASSERT_PTR(userdata);
LookupParameters p = {};
Home *h;
int r;
assert(parameters);
r = json_dispatch(parameters, dispatch_table, NULL, 0, &p);
if (r < 0)
return r;
if (!streq_ptr(p.service, m->userdb_service))
return varlink_error(link, "io.systemd.UserDatabase.BadService", NULL);
if (p.user_name) {
const char *last = NULL;
h = hashmap_get(m->homes_by_name, p.user_name);
if (!h)
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
if (p.group_name) {
if (!strv_contains(h->record->member_of, p.group_name))
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
return varlink_replyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(h->user_name)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(p.group_name))));
}
STRV_FOREACH(i, h->record->member_of) {
if (last) {
r = varlink_notifyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(h->user_name)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(last))));
if (r < 0)
return r;
}
last = *i;
}
if (last)
return varlink_replyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(h->user_name)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(last))));
} else if (p.group_name) {
const char *last = NULL;
HASHMAP_FOREACH(h, m->homes_by_name) {
if (!strv_contains(h->record->member_of, p.group_name))
continue;
if (last) {
r = varlink_notifyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(last)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(p.group_name))));
if (r < 0)
return r;
}
last = h->user_name;
}
if (last)
return varlink_replyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(last)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(p.group_name))));
} else {
const char *last_user_name = NULL, *last_group_name = NULL;
HASHMAP_FOREACH(h, m->homes_by_name)
STRV_FOREACH(j, h->record->member_of) {
if (last_user_name) {
assert(last_group_name);
r = varlink_notifyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(last_user_name)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(last_group_name))));
if (r < 0)
return r;
}
last_user_name = h->user_name;
last_group_name = *j;
}
if (last_user_name) {
assert(last_group_name);
return varlink_replyb(link, JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(last_user_name)),
JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(last_group_name))));
}
}
return varlink_error(link, "io.systemd.UserDatabase.NoRecordFound", NULL);
}
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