2 * rpcd - UBUS RPC server
4 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
5 * Copyright (C) 2013-2014 Jo-Philipp Wich <jow@openwrt.org>
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #define _GNU_SOURCE /* crypt() */
22 #include <libubox/avl-cmp.h>
23 #include <libubox/blobmsg.h>
24 #include <libubox/utils.h>
35 #include <rpcd/session.h>
37 static struct avl_tree sessions;
38 static struct blob_buf buf;
40 static LIST_HEAD(create_callbacks);
41 static LIST_HEAD(destroy_callbacks);
47 static const struct blobmsg_policy new_policy[__RPC_SN_MAX] = {
48 [RPC_SN_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
55 static const struct blobmsg_policy sid_policy[__RPC_SI_MAX] = {
56 [RPC_SI_SID] = { .name = "ubus_rpc_session", .type = BLOBMSG_TYPE_STRING },
64 static const struct blobmsg_policy set_policy[__RPC_SS_MAX] = {
65 [RPC_SS_SID] = { .name = "ubus_rpc_session", .type = BLOBMSG_TYPE_STRING },
66 [RPC_SS_VALUES] = { .name = "values", .type = BLOBMSG_TYPE_TABLE },
74 static const struct blobmsg_policy get_policy[__RPC_SG_MAX] = {
75 [RPC_SG_SID] = { .name = "ubus_rpc_session", .type = BLOBMSG_TYPE_STRING },
76 [RPC_SG_KEYS] = { .name = "keys", .type = BLOBMSG_TYPE_ARRAY },
85 static const struct blobmsg_policy acl_policy[__RPC_SA_MAX] = {
86 [RPC_SA_SID] = { .name = "ubus_rpc_session", .type = BLOBMSG_TYPE_STRING },
87 [RPC_SA_SCOPE] = { .name = "scope", .type = BLOBMSG_TYPE_STRING },
88 [RPC_SA_OBJECTS] = { .name = "objects", .type = BLOBMSG_TYPE_ARRAY },
98 static const struct blobmsg_policy perm_policy[__RPC_SP_MAX] = {
99 [RPC_SP_SID] = { .name = "ubus_rpc_session", .type = BLOBMSG_TYPE_STRING },
100 [RPC_SP_SCOPE] = { .name = "scope", .type = BLOBMSG_TYPE_STRING },
101 [RPC_SP_OBJECT] = { .name = "object", .type = BLOBMSG_TYPE_STRING },
102 [RPC_SP_FUNCTION] = { .name = "function", .type = BLOBMSG_TYPE_STRING },
112 static const struct blobmsg_policy dump_policy[__RPC_DUMP_MAX] = {
113 [RPC_DUMP_SID] = { .name = "ubus_rpc_session", .type = BLOBMSG_TYPE_STRING },
114 [RPC_DUMP_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
115 [RPC_DUMP_EXPIRES] = { .name = "expires", .type = BLOBMSG_TYPE_INT32 },
116 [RPC_DUMP_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
125 static const struct blobmsg_policy login_policy[__RPC_L_MAX] = {
126 [RPC_L_USERNAME] = { .name = "username", .type = BLOBMSG_TYPE_STRING },
127 [RPC_L_PASSWORD] = { .name = "password", .type = BLOBMSG_TYPE_STRING },
128 [RPC_L_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
132 * Keys in the AVL tree contain all pattern characters up to the first wildcard.
133 * To look up entries, start with the last entry that has a key less than or
134 * equal to the method name, then work backwards as long as the AVL key still
135 * matches its counterpart in the object name
137 #define uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
138 for (_acl = avl_find_le_element(_avl, _obj, _acl, avl); \
140 _acl = avl_is_first(_avl, &(_acl)->avl) ? NULL : \
141 avl_prev_element((_acl), avl))
143 #define uh_foreach_matching_acl(_acl, _avl, _obj, _func) \
144 uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
145 if (!strncmp((_acl)->object, _obj, (_acl)->sort_len) && \
146 !fnmatch((_acl)->object, (_obj), FNM_NOESCAPE) && \
147 !fnmatch((_acl)->function, (_func), FNM_NOESCAPE))
150 rpc_random(char *dest)
152 unsigned char buf[16] = { 0 };
156 f = fopen("/dev/urandom", "r");
160 fread(buf, 1, sizeof(buf), f);
163 for (i = 0; i < sizeof(buf); i++)
164 sprintf(dest + (i<<1), "%02x", buf[i]);
168 rpc_session_dump_data(struct rpc_session *ses, struct blob_buf *b)
170 struct rpc_session_data *d;
172 avl_for_each_element(&ses->data, d, avl) {
173 blobmsg_add_field(b, blobmsg_type(d->attr), blobmsg_name(d->attr),
174 blobmsg_data(d->attr), blobmsg_data_len(d->attr));
179 rpc_session_dump_acls(struct rpc_session *ses, struct blob_buf *b)
181 struct rpc_session_acl *acl;
182 struct rpc_session_acl_scope *acl_scope;
183 const char *lastobj = NULL;
184 const char *lastscope = NULL;
185 void *c = NULL, *d = NULL;
187 avl_for_each_element(&ses->acls, acl_scope, avl) {
188 if (!lastscope || strcmp(acl_scope->avl.key, lastscope))
190 if (c) blobmsg_close_table(b, c);
191 c = blobmsg_open_table(b, acl_scope->avl.key);
197 avl_for_each_element(&acl_scope->acls, acl, avl) {
198 if (!lastobj || strcmp(acl->object, lastobj))
200 if (d) blobmsg_close_array(b, d);
201 d = blobmsg_open_array(b, acl->object);
204 blobmsg_add_string(b, NULL, acl->function);
205 lastobj = acl->object;
208 if (d) blobmsg_close_array(b, d);
211 if (c) blobmsg_close_table(b, c);
215 rpc_session_to_blob(struct rpc_session *ses, bool acls)
219 blob_buf_init(&buf, 0);
221 blobmsg_add_string(&buf, "ubus_rpc_session", ses->id);
222 blobmsg_add_u32(&buf, "timeout", ses->timeout);
223 blobmsg_add_u32(&buf, "expires", uloop_timeout_remaining(&ses->t) / 1000);
226 c = blobmsg_open_table(&buf, "acls");
227 rpc_session_dump_acls(ses, &buf);
228 blobmsg_close_table(&buf, c);
231 c = blobmsg_open_table(&buf, "data");
232 rpc_session_dump_data(ses, &buf);
233 blobmsg_close_table(&buf, c);
237 rpc_session_dump(struct rpc_session *ses, struct ubus_context *ctx,
238 struct ubus_request_data *req)
240 rpc_session_to_blob(ses, true);
242 ubus_send_reply(ctx, req, buf.head);
246 rpc_touch_session(struct rpc_session *ses)
248 if (ses->timeout > 0)
249 uloop_timeout_set(&ses->t, ses->timeout * 1000);
253 rpc_session_destroy(struct rpc_session *ses)
255 struct rpc_session_acl *acl, *nacl;
256 struct rpc_session_acl_scope *acl_scope, *nacl_scope;
257 struct rpc_session_data *data, *ndata;
258 struct rpc_session_cb *cb;
260 list_for_each_entry(cb, &destroy_callbacks, list)
261 cb->cb(ses, cb->priv);
263 uloop_timeout_cancel(&ses->t);
265 avl_for_each_element_safe(&ses->acls, acl_scope, avl, nacl_scope) {
266 avl_remove_all_elements(&acl_scope->acls, acl, avl, nacl)
269 avl_delete(&ses->acls, &acl_scope->avl);
273 avl_remove_all_elements(&ses->data, data, avl, ndata)
276 avl_delete(&sessions, &ses->avl);
280 static void rpc_session_timeout(struct uloop_timeout *t)
282 struct rpc_session *ses;
284 ses = container_of(t, struct rpc_session, t);
285 rpc_session_destroy(ses);
288 static struct rpc_session *
289 rpc_session_new(void)
291 struct rpc_session *ses;
293 ses = calloc(1, sizeof(*ses));
298 ses->avl.key = ses->id;
300 avl_init(&ses->acls, avl_strcmp, true, NULL);
301 avl_init(&ses->data, avl_strcmp, false, NULL);
303 ses->t.cb = rpc_session_timeout;
308 static struct rpc_session *
309 rpc_session_create(int timeout)
311 struct rpc_session *ses;
312 struct rpc_session_cb *cb;
314 ses = rpc_session_new();
321 ses->timeout = timeout;
323 avl_insert(&sessions, &ses->avl);
325 rpc_touch_session(ses);
327 list_for_each_entry(cb, &create_callbacks, list)
328 cb->cb(ses, cb->priv);
333 static struct rpc_session *
334 rpc_session_get(const char *id)
336 struct rpc_session *ses;
338 ses = avl_find_element(&sessions, id, ses, avl);
342 rpc_touch_session(ses);
347 rpc_handle_create(struct ubus_context *ctx, struct ubus_object *obj,
348 struct ubus_request_data *req, const char *method,
349 struct blob_attr *msg)
351 struct rpc_session *ses;
352 struct blob_attr *tb;
353 int timeout = RPC_DEFAULT_SESSION_TIMEOUT;
355 blobmsg_parse(new_policy, __RPC_SN_MAX, &tb, blob_data(msg), blob_len(msg));
357 timeout = blobmsg_get_u32(tb);
359 ses = rpc_session_create(timeout);
361 rpc_session_dump(ses, ctx, req);
367 rpc_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
368 struct ubus_request_data *req, const char *method,
369 struct blob_attr *msg)
371 struct rpc_session *ses;
372 struct blob_attr *tb;
374 blobmsg_parse(sid_policy, __RPC_SI_MAX, &tb, blob_data(msg), blob_len(msg));
377 avl_for_each_element(&sessions, ses, avl)
378 rpc_session_dump(ses, ctx, req);
382 ses = rpc_session_get(blobmsg_data(tb));
384 return UBUS_STATUS_NOT_FOUND;
386 rpc_session_dump(ses, ctx, req);
392 uh_id_len(const char *str)
394 return strcspn(str, "*?[");
398 rpc_session_grant(struct rpc_session *ses,
399 const char *scope, const char *object, const char *function)
401 struct rpc_session_acl *acl;
402 struct rpc_session_acl_scope *acl_scope;
403 char *new_scope, *new_obj, *new_func, *new_id;
406 if (!object || !function)
407 return UBUS_STATUS_INVALID_ARGUMENT;
409 acl_scope = avl_find_element(&ses->acls, scope, acl_scope, avl);
412 uh_foreach_matching_acl_prefix(acl, &acl_scope->acls, object, function) {
413 if (!strcmp(acl->object, object) &&
414 !strcmp(acl->function, function))
420 acl_scope = calloc_a(sizeof(*acl_scope),
421 &new_scope, strlen(scope) + 1);
424 return UBUS_STATUS_UNKNOWN_ERROR;
426 acl_scope->avl.key = strcpy(new_scope, scope);
427 avl_init(&acl_scope->acls, avl_strcmp, true, NULL);
428 avl_insert(&ses->acls, &acl_scope->avl);
431 id_len = uh_id_len(object);
432 acl = calloc_a(sizeof(*acl),
433 &new_obj, strlen(object) + 1,
434 &new_func, strlen(function) + 1,
435 &new_id, id_len + 1);
438 return UBUS_STATUS_UNKNOWN_ERROR;
440 acl->object = strcpy(new_obj, object);
441 acl->function = strcpy(new_func, function);
442 acl->avl.key = strncpy(new_id, object, id_len);
443 avl_insert(&acl_scope->acls, &acl->avl);
449 rpc_session_revoke(struct rpc_session *ses,
450 const char *scope, const char *object, const char *function)
452 struct rpc_session_acl *acl, *next;
453 struct rpc_session_acl_scope *acl_scope;
457 acl_scope = avl_find_element(&ses->acls, scope, acl_scope, avl);
462 if (!object && !function) {
463 avl_remove_all_elements(&acl_scope->acls, acl, avl, next)
465 avl_delete(&ses->acls, &acl_scope->avl);
470 id_len = uh_id_len(object);
471 id = alloca(id_len + 1);
472 strncpy(id, object, id_len);
475 acl = avl_find_element(&acl_scope->acls, id, acl, avl);
477 if (!avl_is_last(&acl_scope->acls, &acl->avl))
478 next = avl_next_element(acl, avl);
482 if (strcmp(id, acl->avl.key) != 0)
485 if (!strcmp(acl->object, object) &&
486 !strcmp(acl->function, function)) {
487 avl_delete(&acl_scope->acls, &acl->avl);
493 if (avl_is_empty(&acl_scope->acls)) {
494 avl_delete(&ses->acls, &acl_scope->avl);
503 rpc_handle_acl(struct ubus_context *ctx, struct ubus_object *obj,
504 struct ubus_request_data *req, const char *method,
505 struct blob_attr *msg)
507 struct rpc_session *ses;
508 struct blob_attr *tb[__RPC_SA_MAX];
509 struct blob_attr *attr, *sattr;
510 const char *object, *function;
511 const char *scope = "ubus";
514 int (*cb)(struct rpc_session *ses,
515 const char *scope, const char *object, const char *function);
517 blobmsg_parse(acl_policy, __RPC_SA_MAX, tb, blob_data(msg), blob_len(msg));
520 return UBUS_STATUS_INVALID_ARGUMENT;
522 ses = rpc_session_get(blobmsg_data(tb[RPC_SA_SID]));
524 return UBUS_STATUS_NOT_FOUND;
526 if (tb[RPC_SA_SCOPE])
527 scope = blobmsg_data(tb[RPC_SA_SCOPE]);
529 if (!strcmp(method, "grant"))
530 cb = rpc_session_grant;
532 cb = rpc_session_revoke;
534 if (!tb[RPC_SA_OBJECTS])
535 return cb(ses, scope, NULL, NULL);
537 blobmsg_for_each_attr(attr, tb[RPC_SA_OBJECTS], rem1) {
538 if (blobmsg_type(attr) != BLOBMSG_TYPE_ARRAY)
544 blobmsg_for_each_attr(sattr, attr, rem2) {
545 if (blobmsg_type(sattr) != BLOBMSG_TYPE_STRING)
549 object = blobmsg_data(sattr);
551 function = blobmsg_data(sattr);
556 if (object && function)
557 cb(ses, scope, object, function);
564 rpc_session_acl_allowed(struct rpc_session *ses, const char *scope,
565 const char *obj, const char *fun)
567 struct rpc_session_acl *acl;
568 struct rpc_session_acl_scope *acl_scope;
570 acl_scope = avl_find_element(&ses->acls, scope, acl_scope, avl);
573 uh_foreach_matching_acl(acl, &acl_scope->acls, obj, fun)
581 rpc_handle_access(struct ubus_context *ctx, struct ubus_object *obj,
582 struct ubus_request_data *req, const char *method,
583 struct blob_attr *msg)
585 struct rpc_session *ses;
586 struct blob_attr *tb[__RPC_SP_MAX];
587 const char *scope = "ubus";
590 blobmsg_parse(perm_policy, __RPC_SP_MAX, tb, blob_data(msg), blob_len(msg));
593 return UBUS_STATUS_INVALID_ARGUMENT;
595 ses = rpc_session_get(blobmsg_data(tb[RPC_SP_SID]));
597 return UBUS_STATUS_NOT_FOUND;
599 blob_buf_init(&buf, 0);
601 if (tb[RPC_SP_OBJECT] && tb[RPC_SP_FUNCTION])
603 if (tb[RPC_SP_SCOPE])
604 scope = blobmsg_data(tb[RPC_SP_SCOPE]);
606 allow = rpc_session_acl_allowed(ses, scope,
607 blobmsg_data(tb[RPC_SP_OBJECT]),
608 blobmsg_data(tb[RPC_SP_FUNCTION]));
610 blobmsg_add_u8(&buf, "access", allow);
614 rpc_session_dump_acls(ses, &buf);
617 ubus_send_reply(ctx, req, buf.head);
623 rpc_session_set(struct rpc_session *ses, const char *key, struct blob_attr *val)
625 struct rpc_session_data *data;
627 data = avl_find_element(&ses->data, key, data, avl);
629 avl_delete(&ses->data, &data->avl);
633 data = calloc(1, sizeof(*data) + blob_pad_len(val));
637 memcpy(data->attr, val, blob_pad_len(val));
638 data->avl.key = blobmsg_name(data->attr);
639 avl_insert(&ses->data, &data->avl);
643 rpc_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
644 struct ubus_request_data *req, const char *method,
645 struct blob_attr *msg)
647 struct rpc_session *ses;
648 struct blob_attr *tb[__RPC_SS_MAX];
649 struct blob_attr *attr;
652 blobmsg_parse(set_policy, __RPC_SS_MAX, tb, blob_data(msg), blob_len(msg));
654 if (!tb[RPC_SS_SID] || !tb[RPC_SS_VALUES])
655 return UBUS_STATUS_INVALID_ARGUMENT;
657 ses = rpc_session_get(blobmsg_data(tb[RPC_SS_SID]));
659 return UBUS_STATUS_NOT_FOUND;
661 blobmsg_for_each_attr(attr, tb[RPC_SS_VALUES], rem) {
662 if (!blobmsg_name(attr)[0])
665 rpc_session_set(ses, blobmsg_name(attr), attr);
672 rpc_handle_get(struct ubus_context *ctx, struct ubus_object *obj,
673 struct ubus_request_data *req, const char *method,
674 struct blob_attr *msg)
676 struct rpc_session *ses;
677 struct rpc_session_data *data;
678 struct blob_attr *tb[__RPC_SG_MAX];
679 struct blob_attr *attr;
683 blobmsg_parse(get_policy, __RPC_SG_MAX, tb, blob_data(msg), blob_len(msg));
686 return UBUS_STATUS_INVALID_ARGUMENT;
688 ses = rpc_session_get(blobmsg_data(tb[RPC_SG_SID]));
690 return UBUS_STATUS_NOT_FOUND;
692 blob_buf_init(&buf, 0);
693 c = blobmsg_open_table(&buf, "values");
696 blobmsg_for_each_attr(attr, tb[RPC_SG_KEYS], rem) {
697 if (blobmsg_type(attr) != BLOBMSG_TYPE_STRING)
700 data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl);
704 blobmsg_add_field(&buf, blobmsg_type(data->attr),
705 blobmsg_name(data->attr),
706 blobmsg_data(data->attr),
707 blobmsg_data_len(data->attr));
710 rpc_session_dump_data(ses, &buf);
712 blobmsg_close_table(&buf, c);
713 ubus_send_reply(ctx, req, buf.head);
719 rpc_handle_unset(struct ubus_context *ctx, struct ubus_object *obj,
720 struct ubus_request_data *req, const char *method,
721 struct blob_attr *msg)
723 struct rpc_session *ses;
724 struct rpc_session_data *data, *ndata;
725 struct blob_attr *tb[__RPC_SA_MAX];
726 struct blob_attr *attr;
729 blobmsg_parse(get_policy, __RPC_SG_MAX, tb, blob_data(msg), blob_len(msg));
732 return UBUS_STATUS_INVALID_ARGUMENT;
734 ses = rpc_session_get(blobmsg_data(tb[RPC_SG_SID]));
736 return UBUS_STATUS_NOT_FOUND;
738 if (!tb[RPC_SG_KEYS]) {
739 avl_remove_all_elements(&ses->data, data, avl, ndata)
744 blobmsg_for_each_attr(attr, tb[RPC_SG_KEYS], rem) {
745 if (blobmsg_type(attr) != BLOBMSG_TYPE_STRING)
748 data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl);
752 avl_delete(&ses->data, &data->avl);
760 rpc_handle_destroy(struct ubus_context *ctx, struct ubus_object *obj,
761 struct ubus_request_data *req, const char *method,
762 struct blob_attr *msg)
764 struct rpc_session *ses;
765 struct blob_attr *tb;
767 blobmsg_parse(sid_policy, __RPC_SI_MAX, &tb, blob_data(msg), blob_len(msg));
770 return UBUS_STATUS_INVALID_ARGUMENT;
772 if (!strcmp(blobmsg_get_string(tb), RPC_DEFAULT_SESSION_ID))
773 return UBUS_STATUS_PERMISSION_DENIED;
775 ses = rpc_session_get(blobmsg_data(tb));
777 return UBUS_STATUS_NOT_FOUND;
779 rpc_session_destroy(ses);
786 rpc_login_test_password(const char *hash, const char *password)
790 /* password is not set */
791 if (!hash || !*hash || !strcmp(hash, "!") || !strcmp(hash, "x"))
796 /* password hash refers to shadow/passwd */
797 else if (!strncmp(hash, "$p$", 3))
800 struct spwd *sp = getspnam(hash + 3);
805 return rpc_login_test_password(sp->sp_pwdp, password);
807 struct passwd *pw = getpwnam(hash + 3);
812 return rpc_login_test_password(pw->pw_passwd, password);
816 crypt_hash = crypt(password, hash);
818 return !strcmp(crypt_hash, hash);
821 static struct uci_section *
822 rpc_login_test_login(struct uci_context *uci,
823 const char *username, const char *password)
825 struct uci_package *p = NULL;
826 struct uci_section *s;
827 struct uci_element *e;
828 struct uci_ptr ptr = { .package = "rpcd" };
830 uci_load(uci, ptr.package, &p);
835 uci_foreach_element(&p->sections, e)
837 s = uci_to_section(e);
839 if (strcmp(s->type, "login"))
842 ptr.section = s->e.name;
845 /* test for matching username */
846 ptr.option = "username";
849 if (uci_lookup_ptr(uci, &ptr, NULL, true))
852 if (ptr.o->type != UCI_TYPE_STRING)
855 if (strcmp(ptr.o->v.string, username))
858 /* If password is NULL, we're restoring ACLs for an existing session,
859 * in this case do not check the password again. */
863 /* test for matching password */
864 ptr.option = "password";
867 if (uci_lookup_ptr(uci, &ptr, NULL, true))
870 if (ptr.o->type != UCI_TYPE_STRING)
873 if (rpc_login_test_password(ptr.o->v.string, password))
881 rpc_login_test_permission(struct uci_section *s,
882 const char *perm, const char *group)
885 struct uci_option *o;
886 struct uci_element *e, *l;
888 /* If the login section is not provided, we're setting up acls for the
889 * default session, in this case uncondionally allow access to the
890 * "unauthenticated" access group */
892 return !strcmp(group, "unauthenticated");
895 uci_foreach_element(&s->options, e)
897 o = uci_to_option(e);
899 if (o->type != UCI_TYPE_LIST)
902 if (strcmp(o->e.name, perm))
905 /* Match negative expressions first. If a negative expression matches
906 * the current group name then deny access. */
907 uci_foreach_element(&o->v.list, l) {
913 while (isspace(*++p));
918 if (!fnmatch(p, group, 0))
922 uci_foreach_element(&o->v.list, l) {
923 if (!l->name || !*l->name || *l->name == '!')
926 if (!fnmatch(l->name, group, 0))
931 /* make sure that write permission implies read permission */
932 if (!strcmp(perm, "read"))
933 return rpc_login_test_permission(s, "write", group);
939 rpc_login_setup_acl_scope(struct rpc_session *ses,
940 struct blob_attr *acl_perm,
941 struct blob_attr *acl_scope)
943 struct blob_attr *acl_obj, *acl_func;
947 * Parse ACL scopes in table notation.
957 if (blobmsg_type(acl_scope) == BLOBMSG_TYPE_TABLE) {
958 blobmsg_for_each_attr(acl_obj, acl_scope, rem) {
959 if (blobmsg_type(acl_obj) != BLOBMSG_TYPE_ARRAY)
962 blobmsg_for_each_attr(acl_func, acl_obj, rem2) {
963 if (blobmsg_type(acl_func) != BLOBMSG_TYPE_STRING)
966 rpc_session_grant(ses, blobmsg_name(acl_scope),
967 blobmsg_name(acl_obj),
968 blobmsg_data(acl_func));
974 * Parse ACL scopes in array notation. The permission ("read" or "write")
975 * will be used as function name for each object.
983 else if (blobmsg_type(acl_scope) == BLOBMSG_TYPE_ARRAY) {
984 blobmsg_for_each_attr(acl_obj, acl_scope, rem) {
985 if (blobmsg_type(acl_obj) != BLOBMSG_TYPE_STRING)
988 rpc_session_grant(ses, blobmsg_name(acl_scope),
989 blobmsg_data(acl_obj),
990 blobmsg_name(acl_perm));
996 rpc_login_setup_acl_file(struct rpc_session *ses, struct uci_section *login,
999 struct blob_buf acl = { 0 };
1000 struct blob_attr *acl_group, *acl_perm, *acl_scope;
1001 int rem, rem2, rem3;
1003 blob_buf_init(&acl, 0);
1005 if (!blobmsg_add_json_from_file(&acl, path)) {
1006 fprintf(stderr, "Failed to parse %s\n", path);
1010 /* Iterate access groups in toplevel object */
1011 blob_for_each_attr(acl_group, acl.head, rem) {
1012 /* Iterate permission objects in each access group object */
1013 blobmsg_for_each_attr(acl_perm, acl_group, rem2) {
1014 if (blobmsg_type(acl_perm) != BLOBMSG_TYPE_TABLE)
1017 /* Only "read" and "write" permissions are defined */
1018 if (strcmp(blobmsg_name(acl_perm), "read") &&
1019 strcmp(blobmsg_name(acl_perm), "write"))
1023 * Check if the current user context specifies the current
1024 * "read" or "write" permission in the given access group.
1026 if (!rpc_login_test_permission(login, blobmsg_name(acl_perm),
1027 blobmsg_name(acl_group)))
1030 /* Iterate scope objects within the permission object */
1031 blobmsg_for_each_attr(acl_scope, acl_perm, rem3) {
1032 /* Setup the scopes of the access group */
1033 rpc_login_setup_acl_scope(ses, acl_perm, acl_scope);
1036 * Add the access group itself as object to the "access-group"
1037 * meta scope and the the permission level ("read" or "write")
1051 * This allows session clients to easily query the allowed
1052 * access groups without having to test access of each single
1053 * <scope>/<object>/<function> tuple defined in a group.
1055 rpc_session_grant(ses, "access-group",
1056 blobmsg_name(acl_group),
1057 blobmsg_name(acl_perm));
1063 blob_buf_free(&acl);
1067 rpc_login_setup_acls(struct rpc_session *ses, struct uci_section *login)
1072 if (glob(RPC_SESSION_ACL_DIR "/*.json", 0, NULL, &gl))
1075 for (i = 0; i < gl.gl_pathc; i++)
1076 rpc_login_setup_acl_file(ses, login, gl.gl_pathv[i]);
1082 rpc_handle_login(struct ubus_context *ctx, struct ubus_object *obj,
1083 struct ubus_request_data *req, const char *method,
1084 struct blob_attr *msg)
1086 struct uci_context *uci = NULL;
1087 struct uci_section *login;
1088 struct rpc_session *ses;
1089 struct blob_attr *tb[__RPC_L_MAX];
1090 int timeout = RPC_DEFAULT_SESSION_TIMEOUT;
1093 blobmsg_parse(login_policy, __RPC_L_MAX, tb, blob_data(msg), blob_len(msg));
1095 if (!tb[RPC_L_USERNAME] || !tb[RPC_L_PASSWORD]) {
1096 rv = UBUS_STATUS_INVALID_ARGUMENT;
1100 uci = uci_alloc_context();
1103 rv = UBUS_STATUS_UNKNOWN_ERROR;
1107 login = rpc_login_test_login(uci, blobmsg_get_string(tb[RPC_L_USERNAME]),
1108 blobmsg_get_string(tb[RPC_L_PASSWORD]));
1111 rv = UBUS_STATUS_PERMISSION_DENIED;
1115 if (tb[RPC_L_TIMEOUT])
1116 timeout = blobmsg_get_u32(tb[RPC_L_TIMEOUT]);
1118 ses = rpc_session_create(timeout);
1121 rv = UBUS_STATUS_UNKNOWN_ERROR;
1125 rpc_login_setup_acls(ses, login);
1127 rpc_session_set(ses, "user", tb[RPC_L_USERNAME]);
1128 rpc_session_dump(ses, ctx, req);
1132 uci_free_context(uci);
1139 rpc_validate_sid(const char *id)
1144 if (strlen(id) != RPC_SID_LEN)
1148 if (!isxdigit(*id++))
1155 rpc_blob_to_file(const char *path, struct blob_attr *attr)
1159 fd = open(path, O_WRONLY | O_CREAT | O_EXCL, 0600);
1164 len = write(fd, attr, blob_pad_len(attr));
1168 if (len != blob_pad_len(attr))
1177 static struct blob_attr *
1178 rpc_blob_from_file(const char *path)
1182 struct blob_attr head, *attr = NULL;
1184 if (stat(path, &s) || !S_ISREG(s.st_mode))
1187 fd = open(path, O_RDONLY);
1192 len = read(fd, &head, sizeof(head));
1194 if (len != sizeof(head) || blob_pad_len(&head) != s.st_size)
1197 attr = calloc(1, s.st_size);
1202 memcpy(attr, &head, sizeof(head));
1204 len += read(fd, (char *)attr + sizeof(head), s.st_size - sizeof(head));
1206 if (len != blob_pad_len(&head))
1224 rpc_session_from_blob(struct uci_context *uci, struct blob_attr *attr)
1227 const char *user = NULL;
1228 struct rpc_session *ses;
1229 struct uci_section *login;
1230 struct blob_attr *tb[__RPC_DUMP_MAX], *data;
1232 blobmsg_parse(dump_policy, __RPC_DUMP_MAX, tb,
1233 blob_data(attr), blob_len(attr));
1235 for (i = 0; i < __RPC_DUMP_MAX; i++)
1239 ses = rpc_session_new();
1244 memcpy(ses->id, blobmsg_data(tb[RPC_DUMP_SID]), RPC_SID_LEN);
1246 ses->timeout = blobmsg_get_u32(tb[RPC_DUMP_TIMEOUT]);
1248 blobmsg_for_each_attr(data, tb[RPC_DUMP_DATA], rem) {
1249 rpc_session_set(ses, blobmsg_name(data), data);
1251 if (!strcmp(blobmsg_name(data), "username"))
1252 user = blobmsg_get_string(data);
1256 login = rpc_login_test_login(uci, user, NULL);
1258 rpc_login_setup_acls(ses, login);
1261 avl_insert(&sessions, &ses->avl);
1263 uloop_timeout_set(&ses->t, blobmsg_get_u32(tb[RPC_DUMP_EXPIRES]) * 1000);
1268 int rpc_session_api_init(struct ubus_context *ctx)
1270 struct rpc_session *ses;
1272 static const struct ubus_method session_methods[] = {
1273 UBUS_METHOD("create", rpc_handle_create, new_policy),
1274 UBUS_METHOD("list", rpc_handle_list, sid_policy),
1275 UBUS_METHOD("grant", rpc_handle_acl, acl_policy),
1276 UBUS_METHOD("revoke", rpc_handle_acl, acl_policy),
1277 UBUS_METHOD("access", rpc_handle_access, perm_policy),
1278 UBUS_METHOD("set", rpc_handle_set, set_policy),
1279 UBUS_METHOD("get", rpc_handle_get, get_policy),
1280 UBUS_METHOD("unset", rpc_handle_unset, get_policy),
1281 UBUS_METHOD("destroy", rpc_handle_destroy, sid_policy),
1282 UBUS_METHOD("login", rpc_handle_login, login_policy),
1285 static struct ubus_object_type session_type =
1286 UBUS_OBJECT_TYPE("luci-rpc-session", session_methods);
1288 static struct ubus_object obj = {
1290 .type = &session_type,
1291 .methods = session_methods,
1292 .n_methods = ARRAY_SIZE(session_methods),
1295 avl_init(&sessions, avl_strcmp, false, NULL);
1297 /* setup the default session */
1298 ses = rpc_session_new();
1301 strcpy(ses->id, RPC_DEFAULT_SESSION_ID);
1302 rpc_login_setup_acls(ses, NULL);
1303 avl_insert(&sessions, &ses->avl);
1306 return ubus_add_object(ctx, &obj);
1309 bool rpc_session_access(const char *sid, const char *scope,
1310 const char *object, const char *function)
1312 struct rpc_session *ses = rpc_session_get(sid);
1317 return rpc_session_acl_allowed(ses, scope, object, function);
1320 void rpc_session_create_cb(struct rpc_session_cb *cb)
1323 list_add(&cb->list, &create_callbacks);
1326 void rpc_session_destroy_cb(struct rpc_session_cb *cb)
1329 list_add(&cb->list, &destroy_callbacks);
1332 void rpc_session_freeze(void)
1335 struct rpc_session *ses;
1336 char path[PATH_MAX];
1338 if (stat(RPC_SESSION_DIRECTORY, &s))
1339 mkdir(RPC_SESSION_DIRECTORY, 0700);
1341 avl_for_each_element(&sessions, ses, avl) {
1342 /* skip default session */
1343 if (!strcmp(ses->id, RPC_DEFAULT_SESSION_ID))
1346 snprintf(path, sizeof(path) - 1, RPC_SESSION_DIRECTORY "/%s", ses->id);
1347 rpc_session_to_blob(ses, false);
1348 rpc_blob_to_file(path, buf.head);
1352 void rpc_session_thaw(void)
1355 char path[PATH_MAX];
1357 struct blob_attr *attr;
1358 struct uci_context *uci;
1360 d = opendir(RPC_SESSION_DIRECTORY);
1365 uci = uci_alloc_context();
1370 while ((e = readdir(d)) != NULL) {
1371 if (!rpc_validate_sid(e->d_name))
1374 snprintf(path, sizeof(path) - 1,
1375 RPC_SESSION_DIRECTORY "/%s", e->d_name);
1377 attr = rpc_blob_from_file(path);
1380 rpc_session_from_blob(uci, attr);
1389 uci_free_context(uci);