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
);
43 static const struct blobmsg_policy new_policy
= {
44 .name
= "timeout", .type
= BLOBMSG_TYPE_INT32
47 static const struct blobmsg_policy sid_policy
= {
48 .name
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
56 static const struct blobmsg_policy set_policy
[__RPC_SS_MAX
] = {
57 [RPC_SS_SID
] = { .name
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
},
58 [RPC_SS_VALUES
] = { .name
= "values", .type
= BLOBMSG_TYPE_TABLE
},
66 static const struct blobmsg_policy get_policy
[__RPC_SG_MAX
] = {
67 [RPC_SG_SID
] = { .name
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
},
68 [RPC_SG_KEYS
] = { .name
= "keys", .type
= BLOBMSG_TYPE_ARRAY
},
77 static const struct blobmsg_policy acl_policy
[__RPC_SA_MAX
] = {
78 [RPC_SA_SID
] = { .name
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
},
79 [RPC_SA_SCOPE
] = { .name
= "scope", .type
= BLOBMSG_TYPE_STRING
},
80 [RPC_SA_OBJECTS
] = { .name
= "objects", .type
= BLOBMSG_TYPE_ARRAY
},
90 static const struct blobmsg_policy perm_policy
[__RPC_SP_MAX
] = {
91 [RPC_SP_SID
] = { .name
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
},
92 [RPC_SP_SCOPE
] = { .name
= "scope", .type
= BLOBMSG_TYPE_STRING
},
93 [RPC_SP_OBJECT
] = { .name
= "object", .type
= BLOBMSG_TYPE_STRING
},
94 [RPC_SP_FUNCTION
] = { .name
= "function", .type
= BLOBMSG_TYPE_STRING
},
104 static const struct blobmsg_policy dump_policy
[__RPC_DUMP_MAX
] = {
105 [RPC_DUMP_SID
] = { .name
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
},
106 [RPC_DUMP_TIMEOUT
] = { .name
= "timeout", .type
= BLOBMSG_TYPE_INT32
},
107 [RPC_DUMP_EXPIRES
] = { .name
= "expires", .type
= BLOBMSG_TYPE_INT32
},
108 [RPC_DUMP_DATA
] = { .name
= "data", .type
= BLOBMSG_TYPE_TABLE
},
117 static const struct blobmsg_policy login_policy
[__RPC_L_MAX
] = {
118 [RPC_L_USERNAME
] = { .name
= "username", .type
= BLOBMSG_TYPE_STRING
},
119 [RPC_L_PASSWORD
] = { .name
= "password", .type
= BLOBMSG_TYPE_STRING
},
120 [RPC_L_TIMEOUT
] = { .name
= "timeout", .type
= BLOBMSG_TYPE_INT32
},
124 * Keys in the AVL tree contain all pattern characters up to the first wildcard.
125 * To look up entries, start with the last entry that has a key less than or
126 * equal to the method name, then work backwards as long as the AVL key still
127 * matches its counterpart in the object name
129 #define uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
130 for (_acl = avl_find_le_element(_avl, _obj, _acl, avl); \
132 _acl = avl_is_first(_avl, &(_acl)->avl) ? NULL : \
133 avl_prev_element((_acl), avl))
135 #define uh_foreach_matching_acl(_acl, _avl, _obj, _func) \
136 uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
137 if (!strncmp((_acl)->object, _obj, (_acl)->sort_len) && \
138 !fnmatch((_acl)->object, (_obj), FNM_NOESCAPE) && \
139 !fnmatch((_acl)->function, (_func), FNM_NOESCAPE))
142 rpc_random(char *dest
)
144 unsigned char buf
[16] = { 0 };
148 f
= fopen("/dev/urandom", "r");
152 fread(buf
, 1, sizeof(buf
), f
);
155 for (i
= 0; i
< sizeof(buf
); i
++)
156 sprintf(dest
+ (i
<<1), "%02x", buf
[i
]);
160 rpc_session_dump_data(struct rpc_session
*ses
, struct blob_buf
*b
)
162 struct rpc_session_data
*d
;
164 avl_for_each_element(&ses
->data
, d
, avl
) {
165 blobmsg_add_field(b
, blobmsg_type(d
->attr
), blobmsg_name(d
->attr
),
166 blobmsg_data(d
->attr
), blobmsg_data_len(d
->attr
));
171 rpc_session_dump_acls(struct rpc_session
*ses
, struct blob_buf
*b
)
173 struct rpc_session_acl
*acl
;
174 struct rpc_session_acl_scope
*acl_scope
;
175 const char *lastobj
= NULL
;
176 const char *lastscope
= NULL
;
177 void *c
= NULL
, *d
= NULL
;
179 avl_for_each_element(&ses
->acls
, acl_scope
, avl
) {
180 if (!lastscope
|| strcmp(acl_scope
->avl
.key
, lastscope
))
182 if (c
) blobmsg_close_table(b
, c
);
183 c
= blobmsg_open_table(b
, acl_scope
->avl
.key
);
189 avl_for_each_element(&acl_scope
->acls
, acl
, avl
) {
190 if (!lastobj
|| strcmp(acl
->object
, lastobj
))
192 if (d
) blobmsg_close_array(b
, d
);
193 d
= blobmsg_open_array(b
, acl
->object
);
196 blobmsg_add_string(b
, NULL
, acl
->function
);
197 lastobj
= acl
->object
;
200 if (d
) blobmsg_close_array(b
, d
);
203 if (c
) blobmsg_close_table(b
, c
);
207 rpc_session_to_blob(struct rpc_session
*ses
, bool acls
)
211 blob_buf_init(&buf
, 0);
213 blobmsg_add_string(&buf
, "ubus_rpc_session", ses
->id
);
214 blobmsg_add_u32(&buf
, "timeout", ses
->timeout
);
215 blobmsg_add_u32(&buf
, "expires", uloop_timeout_remaining(&ses
->t
) / 1000);
218 c
= blobmsg_open_table(&buf
, "acls");
219 rpc_session_dump_acls(ses
, &buf
);
220 blobmsg_close_table(&buf
, c
);
223 c
= blobmsg_open_table(&buf
, "data");
224 rpc_session_dump_data(ses
, &buf
);
225 blobmsg_close_table(&buf
, c
);
229 rpc_session_dump(struct rpc_session
*ses
, struct ubus_context
*ctx
,
230 struct ubus_request_data
*req
)
232 rpc_session_to_blob(ses
, true);
234 ubus_send_reply(ctx
, req
, buf
.head
);
238 rpc_touch_session(struct rpc_session
*ses
)
240 if (ses
->timeout
> 0)
241 uloop_timeout_set(&ses
->t
, ses
->timeout
* 1000);
245 rpc_session_destroy(struct rpc_session
*ses
)
247 struct rpc_session_acl
*acl
, *nacl
;
248 struct rpc_session_acl_scope
*acl_scope
, *nacl_scope
;
249 struct rpc_session_data
*data
, *ndata
;
250 struct rpc_session_cb
*cb
;
252 list_for_each_entry(cb
, &destroy_callbacks
, list
)
253 cb
->cb(ses
, cb
->priv
);
255 uloop_timeout_cancel(&ses
->t
);
257 avl_for_each_element_safe(&ses
->acls
, acl_scope
, avl
, nacl_scope
) {
258 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, nacl
)
261 avl_delete(&ses
->acls
, &acl_scope
->avl
);
265 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
268 avl_delete(&sessions
, &ses
->avl
);
272 static void rpc_session_timeout(struct uloop_timeout
*t
)
274 struct rpc_session
*ses
;
276 ses
= container_of(t
, struct rpc_session
, t
);
277 rpc_session_destroy(ses
);
280 static struct rpc_session
*
281 rpc_session_new(void)
283 struct rpc_session
*ses
;
285 ses
= calloc(1, sizeof(*ses
));
290 ses
->avl
.key
= ses
->id
;
292 avl_init(&ses
->acls
, avl_strcmp
, true, NULL
);
293 avl_init(&ses
->data
, avl_strcmp
, false, NULL
);
295 ses
->t
.cb
= rpc_session_timeout
;
300 static struct rpc_session
*
301 rpc_session_create(int timeout
)
303 struct rpc_session
*ses
;
304 struct rpc_session_cb
*cb
;
306 ses
= rpc_session_new();
313 ses
->timeout
= timeout
;
315 avl_insert(&sessions
, &ses
->avl
);
317 rpc_touch_session(ses
);
319 list_for_each_entry(cb
, &create_callbacks
, list
)
320 cb
->cb(ses
, cb
->priv
);
325 static struct rpc_session
*
326 rpc_session_get(const char *id
)
328 struct rpc_session
*ses
;
330 ses
= avl_find_element(&sessions
, id
, ses
, avl
);
334 rpc_touch_session(ses
);
339 rpc_handle_create(struct ubus_context
*ctx
, struct ubus_object
*obj
,
340 struct ubus_request_data
*req
, const char *method
,
341 struct blob_attr
*msg
)
343 struct rpc_session
*ses
;
344 struct blob_attr
*tb
;
345 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
347 blobmsg_parse(&new_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
349 timeout
= blobmsg_get_u32(tb
);
351 ses
= rpc_session_create(timeout
);
353 rpc_session_dump(ses
, ctx
, req
);
359 rpc_handle_list(struct ubus_context
*ctx
, struct ubus_object
*obj
,
360 struct ubus_request_data
*req
, const char *method
,
361 struct blob_attr
*msg
)
363 struct rpc_session
*ses
;
364 struct blob_attr
*tb
;
366 blobmsg_parse(&sid_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
369 avl_for_each_element(&sessions
, ses
, avl
)
370 rpc_session_dump(ses
, ctx
, req
);
374 ses
= rpc_session_get(blobmsg_data(tb
));
376 return UBUS_STATUS_NOT_FOUND
;
378 rpc_session_dump(ses
, ctx
, req
);
384 uh_id_len(const char *str
)
386 return strcspn(str
, "*?[");
390 rpc_session_grant(struct rpc_session
*ses
,
391 const char *scope
, const char *object
, const char *function
)
393 struct rpc_session_acl
*acl
;
394 struct rpc_session_acl_scope
*acl_scope
;
395 char *new_scope
, *new_obj
, *new_func
, *new_id
;
398 if (!object
|| !function
)
399 return UBUS_STATUS_INVALID_ARGUMENT
;
401 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
404 uh_foreach_matching_acl_prefix(acl
, &acl_scope
->acls
, object
, function
) {
405 if (!strcmp(acl
->object
, object
) &&
406 !strcmp(acl
->function
, function
))
412 acl_scope
= calloc_a(sizeof(*acl_scope
),
413 &new_scope
, strlen(scope
) + 1);
416 return UBUS_STATUS_UNKNOWN_ERROR
;
418 acl_scope
->avl
.key
= strcpy(new_scope
, scope
);
419 avl_init(&acl_scope
->acls
, avl_strcmp
, true, NULL
);
420 avl_insert(&ses
->acls
, &acl_scope
->avl
);
423 id_len
= uh_id_len(object
);
424 acl
= calloc_a(sizeof(*acl
),
425 &new_obj
, strlen(object
) + 1,
426 &new_func
, strlen(function
) + 1,
427 &new_id
, id_len
+ 1);
430 return UBUS_STATUS_UNKNOWN_ERROR
;
432 acl
->object
= strcpy(new_obj
, object
);
433 acl
->function
= strcpy(new_func
, function
);
434 acl
->avl
.key
= strncpy(new_id
, object
, id_len
);
435 avl_insert(&acl_scope
->acls
, &acl
->avl
);
441 rpc_session_revoke(struct rpc_session
*ses
,
442 const char *scope
, const char *object
, const char *function
)
444 struct rpc_session_acl
*acl
, *next
;
445 struct rpc_session_acl_scope
*acl_scope
;
449 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
454 if (!object
&& !function
) {
455 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, next
)
457 avl_delete(&ses
->acls
, &acl_scope
->avl
);
462 id_len
= uh_id_len(object
);
463 id
= alloca(id_len
+ 1);
464 strncpy(id
, object
, id_len
);
467 acl
= avl_find_element(&acl_scope
->acls
, id
, acl
, avl
);
469 if (!avl_is_last(&acl_scope
->acls
, &acl
->avl
))
470 next
= avl_next_element(acl
, avl
);
474 if (strcmp(id
, acl
->avl
.key
) != 0)
477 if (!strcmp(acl
->object
, object
) &&
478 !strcmp(acl
->function
, function
)) {
479 avl_delete(&acl_scope
->acls
, &acl
->avl
);
485 if (avl_is_empty(&acl_scope
->acls
)) {
486 avl_delete(&ses
->acls
, &acl_scope
->avl
);
495 rpc_handle_acl(struct ubus_context
*ctx
, struct ubus_object
*obj
,
496 struct ubus_request_data
*req
, const char *method
,
497 struct blob_attr
*msg
)
499 struct rpc_session
*ses
;
500 struct blob_attr
*tb
[__RPC_SA_MAX
];
501 struct blob_attr
*attr
, *sattr
;
502 const char *object
, *function
;
503 const char *scope
= "ubus";
506 int (*cb
)(struct rpc_session
*ses
,
507 const char *scope
, const char *object
, const char *function
);
509 blobmsg_parse(acl_policy
, __RPC_SA_MAX
, tb
, blob_data(msg
), blob_len(msg
));
512 return UBUS_STATUS_INVALID_ARGUMENT
;
514 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SA_SID
]));
516 return UBUS_STATUS_NOT_FOUND
;
518 if (tb
[RPC_SA_SCOPE
])
519 scope
= blobmsg_data(tb
[RPC_SA_SCOPE
]);
521 if (!strcmp(method
, "grant"))
522 cb
= rpc_session_grant
;
524 cb
= rpc_session_revoke
;
526 if (!tb
[RPC_SA_OBJECTS
])
527 return cb(ses
, scope
, NULL
, NULL
);
529 blobmsg_for_each_attr(attr
, tb
[RPC_SA_OBJECTS
], rem1
) {
530 if (blobmsg_type(attr
) != BLOBMSG_TYPE_ARRAY
)
536 blobmsg_for_each_attr(sattr
, attr
, rem2
) {
537 if (blobmsg_type(sattr
) != BLOBMSG_TYPE_STRING
)
541 object
= blobmsg_data(sattr
);
543 function
= blobmsg_data(sattr
);
548 if (object
&& function
)
549 cb(ses
, scope
, object
, function
);
556 rpc_session_acl_allowed(struct rpc_session
*ses
, const char *scope
,
557 const char *obj
, const char *fun
)
559 struct rpc_session_acl
*acl
;
560 struct rpc_session_acl_scope
*acl_scope
;
562 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
565 uh_foreach_matching_acl(acl
, &acl_scope
->acls
, obj
, fun
)
573 rpc_handle_access(struct ubus_context
*ctx
, struct ubus_object
*obj
,
574 struct ubus_request_data
*req
, const char *method
,
575 struct blob_attr
*msg
)
577 struct rpc_session
*ses
;
578 struct blob_attr
*tb
[__RPC_SP_MAX
];
579 const char *scope
= "ubus";
582 blobmsg_parse(perm_policy
, __RPC_SP_MAX
, tb
, blob_data(msg
), blob_len(msg
));
585 return UBUS_STATUS_INVALID_ARGUMENT
;
587 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SP_SID
]));
589 return UBUS_STATUS_NOT_FOUND
;
591 blob_buf_init(&buf
, 0);
593 if (tb
[RPC_SP_OBJECT
] && tb
[RPC_SP_FUNCTION
])
595 if (tb
[RPC_SP_SCOPE
])
596 scope
= blobmsg_data(tb
[RPC_SP_SCOPE
]);
598 allow
= rpc_session_acl_allowed(ses
, scope
,
599 blobmsg_data(tb
[RPC_SP_OBJECT
]),
600 blobmsg_data(tb
[RPC_SP_FUNCTION
]));
602 blobmsg_add_u8(&buf
, "access", allow
);
606 rpc_session_dump_acls(ses
, &buf
);
609 ubus_send_reply(ctx
, req
, buf
.head
);
615 rpc_session_set(struct rpc_session
*ses
, const char *key
, struct blob_attr
*val
)
617 struct rpc_session_data
*data
;
619 data
= avl_find_element(&ses
->data
, key
, data
, avl
);
621 avl_delete(&ses
->data
, &data
->avl
);
625 data
= calloc(1, sizeof(*data
) + blob_pad_len(val
));
629 memcpy(data
->attr
, val
, blob_pad_len(val
));
630 data
->avl
.key
= blobmsg_name(data
->attr
);
631 avl_insert(&ses
->data
, &data
->avl
);
635 rpc_handle_set(struct ubus_context
*ctx
, struct ubus_object
*obj
,
636 struct ubus_request_data
*req
, const char *method
,
637 struct blob_attr
*msg
)
639 struct rpc_session
*ses
;
640 struct blob_attr
*tb
[__RPC_SS_MAX
];
641 struct blob_attr
*attr
;
644 blobmsg_parse(set_policy
, __RPC_SS_MAX
, tb
, blob_data(msg
), blob_len(msg
));
646 if (!tb
[RPC_SS_SID
] || !tb
[RPC_SS_VALUES
])
647 return UBUS_STATUS_INVALID_ARGUMENT
;
649 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SS_SID
]));
651 return UBUS_STATUS_NOT_FOUND
;
653 blobmsg_for_each_attr(attr
, tb
[RPC_SS_VALUES
], rem
) {
654 if (!blobmsg_name(attr
)[0])
657 rpc_session_set(ses
, blobmsg_name(attr
), attr
);
664 rpc_handle_get(struct ubus_context
*ctx
, struct ubus_object
*obj
,
665 struct ubus_request_data
*req
, const char *method
,
666 struct blob_attr
*msg
)
668 struct rpc_session
*ses
;
669 struct rpc_session_data
*data
;
670 struct blob_attr
*tb
[__RPC_SG_MAX
];
671 struct blob_attr
*attr
;
675 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
678 return UBUS_STATUS_INVALID_ARGUMENT
;
680 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
682 return UBUS_STATUS_NOT_FOUND
;
684 blob_buf_init(&buf
, 0);
685 c
= blobmsg_open_table(&buf
, "values");
688 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
689 if (blobmsg_type(attr
) != BLOBMSG_TYPE_STRING
)
692 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
696 blobmsg_add_field(&buf
, blobmsg_type(data
->attr
),
697 blobmsg_name(data
->attr
),
698 blobmsg_data(data
->attr
),
699 blobmsg_data_len(data
->attr
));
702 rpc_session_dump_data(ses
, &buf
);
704 blobmsg_close_table(&buf
, c
);
705 ubus_send_reply(ctx
, req
, buf
.head
);
711 rpc_handle_unset(struct ubus_context
*ctx
, struct ubus_object
*obj
,
712 struct ubus_request_data
*req
, const char *method
,
713 struct blob_attr
*msg
)
715 struct rpc_session
*ses
;
716 struct rpc_session_data
*data
, *ndata
;
717 struct blob_attr
*tb
[__RPC_SA_MAX
];
718 struct blob_attr
*attr
;
721 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
724 return UBUS_STATUS_INVALID_ARGUMENT
;
726 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
728 return UBUS_STATUS_NOT_FOUND
;
730 if (!tb
[RPC_SG_KEYS
]) {
731 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
736 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
737 if (blobmsg_type(attr
) != BLOBMSG_TYPE_STRING
)
740 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
744 avl_delete(&ses
->data
, &data
->avl
);
752 rpc_handle_destroy(struct ubus_context
*ctx
, struct ubus_object
*obj
,
753 struct ubus_request_data
*req
, const char *method
,
754 struct blob_attr
*msg
)
756 struct rpc_session
*ses
;
757 struct blob_attr
*tb
;
759 blobmsg_parse(&sid_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
762 return UBUS_STATUS_INVALID_ARGUMENT
;
764 if (!strcmp(blobmsg_get_string(tb
), RPC_DEFAULT_SESSION_ID
))
765 return UBUS_STATUS_PERMISSION_DENIED
;
767 ses
= rpc_session_get(blobmsg_data(tb
));
769 return UBUS_STATUS_NOT_FOUND
;
771 rpc_session_destroy(ses
);
778 rpc_login_test_password(const char *hash
, const char *password
)
782 /* password is not set */
783 if (!hash
|| !*hash
|| !strcmp(hash
, "!") || !strcmp(hash
, "x"))
788 /* password hash refers to shadow/passwd */
789 else if (!strncmp(hash
, "$p$", 3))
792 struct spwd
*sp
= getspnam(hash
+ 3);
797 return rpc_login_test_password(sp
->sp_pwdp
, password
);
799 struct passwd
*pw
= getpwnam(hash
+ 3);
804 return rpc_login_test_password(pw
->pw_passwd
, password
);
808 crypt_hash
= crypt(password
, hash
);
810 return !strcmp(crypt_hash
, hash
);
813 static struct uci_section
*
814 rpc_login_test_login(struct uci_context
*uci
,
815 const char *username
, const char *password
)
817 struct uci_package
*p
= NULL
;
818 struct uci_section
*s
;
819 struct uci_element
*e
;
820 struct uci_ptr ptr
= { .package
= "rpcd" };
822 uci_load(uci
, ptr
.package
, &p
);
827 uci_foreach_element(&p
->sections
, e
)
829 s
= uci_to_section(e
);
831 if (strcmp(s
->type
, "login"))
834 ptr
.section
= s
->e
.name
;
837 /* test for matching username */
838 ptr
.option
= "username";
841 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
844 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
847 if (strcmp(ptr
.o
->v
.string
, username
))
850 /* If password is NULL, we're restoring ACLs for an existing session,
851 * in this case do not check the password again. */
855 /* test for matching password */
856 ptr
.option
= "password";
859 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
862 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
865 if (rpc_login_test_password(ptr
.o
->v
.string
, password
))
873 rpc_login_test_permission(struct uci_section
*s
,
874 const char *perm
, const char *group
)
877 struct uci_option
*o
;
878 struct uci_element
*e
, *l
;
880 /* If the login section is not provided, we're setting up acls for the
881 * default session, in this case uncondionally allow access to the
882 * "unauthenticated" access group */
884 return !strcmp(group
, "unauthenticated");
887 uci_foreach_element(&s
->options
, e
)
889 o
= uci_to_option(e
);
891 if (o
->type
!= UCI_TYPE_LIST
)
894 if (strcmp(o
->e
.name
, perm
))
897 /* Match negative expressions first. If a negative expression matches
898 * the current group name then deny access. */
899 uci_foreach_element(&o
->v
.list
, l
) {
905 while (isspace(*++p
));
910 if (!fnmatch(p
, group
, 0))
914 uci_foreach_element(&o
->v
.list
, l
) {
915 if (!l
->name
|| !*l
->name
|| *l
->name
== '!')
918 if (!fnmatch(l
->name
, group
, 0))
923 /* make sure that write permission implies read permission */
924 if (!strcmp(perm
, "read"))
925 return rpc_login_test_permission(s
, "write", group
);
931 rpc_login_setup_acl_scope(struct rpc_session
*ses
,
932 struct blob_attr
*acl_perm
,
933 struct blob_attr
*acl_scope
)
935 struct blob_attr
*acl_obj
, *acl_func
;
939 * Parse ACL scopes in table notation.
949 if (blobmsg_type(acl_scope
) == BLOBMSG_TYPE_TABLE
) {
950 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
951 if (blobmsg_type(acl_obj
) != BLOBMSG_TYPE_ARRAY
)
954 blobmsg_for_each_attr(acl_func
, acl_obj
, rem2
) {
955 if (blobmsg_type(acl_func
) != BLOBMSG_TYPE_STRING
)
958 rpc_session_grant(ses
, blobmsg_name(acl_scope
),
959 blobmsg_name(acl_obj
),
960 blobmsg_data(acl_func
));
966 * Parse ACL scopes in array notation. The permission ("read" or "write")
967 * will be used as function name for each object.
975 else if (blobmsg_type(acl_scope
) == BLOBMSG_TYPE_ARRAY
) {
976 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
977 if (blobmsg_type(acl_obj
) != BLOBMSG_TYPE_STRING
)
980 rpc_session_grant(ses
, blobmsg_name(acl_scope
),
981 blobmsg_data(acl_obj
),
982 blobmsg_name(acl_perm
));
988 rpc_login_setup_acl_file(struct rpc_session
*ses
, struct uci_section
*login
,
991 struct blob_buf acl
= { 0 };
992 struct blob_attr
*acl_group
, *acl_perm
, *acl_scope
;
995 blob_buf_init(&acl
, 0);
997 if (!blobmsg_add_json_from_file(&acl
, path
)) {
998 fprintf(stderr
, "Failed to parse %s\n", path
);
1002 /* Iterate access groups in toplevel object */
1003 blob_for_each_attr(acl_group
, acl
.head
, rem
) {
1004 /* Iterate permission objects in each access group object */
1005 blobmsg_for_each_attr(acl_perm
, acl_group
, rem2
) {
1006 if (blobmsg_type(acl_perm
) != BLOBMSG_TYPE_TABLE
)
1009 /* Only "read" and "write" permissions are defined */
1010 if (strcmp(blobmsg_name(acl_perm
), "read") &&
1011 strcmp(blobmsg_name(acl_perm
), "write"))
1015 * Check if the current user context specifies the current
1016 * "read" or "write" permission in the given access group.
1018 if (!rpc_login_test_permission(login
, blobmsg_name(acl_perm
),
1019 blobmsg_name(acl_group
)))
1022 /* Iterate scope objects within the permission object */
1023 blobmsg_for_each_attr(acl_scope
, acl_perm
, rem3
) {
1024 /* Setup the scopes of the access group */
1025 rpc_login_setup_acl_scope(ses
, acl_perm
, acl_scope
);
1028 * Add the access group itself as object to the "access-group"
1029 * meta scope and the the permission level ("read" or "write")
1043 * This allows session clients to easily query the allowed
1044 * access groups without having to test access of each single
1045 * <scope>/<object>/<function> tuple defined in a group.
1047 rpc_session_grant(ses
, "access-group",
1048 blobmsg_name(acl_group
),
1049 blobmsg_name(acl_perm
));
1055 blob_buf_free(&acl
);
1059 rpc_login_setup_acls(struct rpc_session
*ses
, struct uci_section
*login
)
1064 if (glob(RPC_SESSION_ACL_DIR
"/*.json", 0, NULL
, &gl
))
1067 for (i
= 0; i
< gl
.gl_pathc
; i
++)
1068 rpc_login_setup_acl_file(ses
, login
, gl
.gl_pathv
[i
]);
1074 rpc_handle_login(struct ubus_context
*ctx
, struct ubus_object
*obj
,
1075 struct ubus_request_data
*req
, const char *method
,
1076 struct blob_attr
*msg
)
1078 struct uci_context
*uci
= NULL
;
1079 struct uci_section
*login
;
1080 struct rpc_session
*ses
;
1081 struct blob_attr
*tb
[__RPC_L_MAX
];
1082 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
1085 blobmsg_parse(login_policy
, __RPC_L_MAX
, tb
, blob_data(msg
), blob_len(msg
));
1087 if (!tb
[RPC_L_USERNAME
] || !tb
[RPC_L_PASSWORD
]) {
1088 rv
= UBUS_STATUS_INVALID_ARGUMENT
;
1092 uci
= uci_alloc_context();
1095 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1099 login
= rpc_login_test_login(uci
, blobmsg_get_string(tb
[RPC_L_USERNAME
]),
1100 blobmsg_get_string(tb
[RPC_L_PASSWORD
]));
1103 rv
= UBUS_STATUS_PERMISSION_DENIED
;
1107 if (tb
[RPC_L_TIMEOUT
])
1108 timeout
= blobmsg_get_u32(tb
[RPC_L_TIMEOUT
]);
1110 ses
= rpc_session_create(timeout
);
1113 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1117 rpc_login_setup_acls(ses
, login
);
1119 rpc_session_set(ses
, "user", tb
[RPC_L_USERNAME
]);
1120 rpc_session_dump(ses
, ctx
, req
);
1124 uci_free_context(uci
);
1131 rpc_validate_sid(const char *id
)
1136 if (strlen(id
) != RPC_SID_LEN
)
1140 if (!isxdigit(*id
++))
1147 rpc_blob_to_file(const char *path
, struct blob_attr
*attr
)
1151 fd
= open(path
, O_WRONLY
| O_CREAT
| O_EXCL
, 0600);
1156 len
= write(fd
, attr
, blob_pad_len(attr
));
1160 if (len
!= blob_pad_len(attr
))
1169 static struct blob_attr
*
1170 rpc_blob_from_file(const char *path
)
1174 struct blob_attr head
, *attr
= NULL
;
1176 if (stat(path
, &s
) || !S_ISREG(s
.st_mode
))
1179 fd
= open(path
, O_RDONLY
);
1184 len
= read(fd
, &head
, sizeof(head
));
1186 if (len
!= sizeof(head
) || blob_pad_len(&head
) != s
.st_size
)
1189 attr
= calloc(1, s
.st_size
);
1194 memcpy(attr
, &head
, sizeof(head
));
1196 len
+= read(fd
, (char *)attr
+ sizeof(head
), s
.st_size
- sizeof(head
));
1198 if (len
!= blob_pad_len(&head
))
1216 rpc_session_from_blob(struct uci_context
*uci
, struct blob_attr
*attr
)
1219 const char *user
= NULL
;
1220 struct rpc_session
*ses
;
1221 struct uci_section
*login
;
1222 struct blob_attr
*tb
[__RPC_DUMP_MAX
], *data
;
1224 blobmsg_parse(dump_policy
, __RPC_DUMP_MAX
, tb
,
1225 blob_data(attr
), blob_len(attr
));
1227 for (i
= 0; i
< __RPC_DUMP_MAX
; i
++)
1231 ses
= rpc_session_new();
1236 memcpy(ses
->id
, blobmsg_data(tb
[RPC_DUMP_SID
]), RPC_SID_LEN
);
1238 ses
->timeout
= blobmsg_get_u32(tb
[RPC_DUMP_TIMEOUT
]);
1240 blobmsg_for_each_attr(data
, tb
[RPC_DUMP_DATA
], rem
) {
1241 rpc_session_set(ses
, blobmsg_name(data
), data
);
1243 if (!strcmp(blobmsg_name(data
), "username"))
1244 user
= blobmsg_get_string(data
);
1248 login
= rpc_login_test_login(uci
, user
, NULL
);
1250 rpc_login_setup_acls(ses
, login
);
1253 avl_insert(&sessions
, &ses
->avl
);
1255 uloop_timeout_set(&ses
->t
, blobmsg_get_u32(tb
[RPC_DUMP_EXPIRES
]) * 1000);
1260 int rpc_session_api_init(struct ubus_context
*ctx
)
1262 struct rpc_session
*ses
;
1264 static const struct ubus_method session_methods
[] = {
1265 UBUS_METHOD("create", rpc_handle_create
, &new_policy
),
1266 UBUS_METHOD("list", rpc_handle_list
, &sid_policy
),
1267 UBUS_METHOD("grant", rpc_handle_acl
, acl_policy
),
1268 UBUS_METHOD("revoke", rpc_handle_acl
, acl_policy
),
1269 UBUS_METHOD("access", rpc_handle_access
, perm_policy
),
1270 UBUS_METHOD("set", rpc_handle_set
, set_policy
),
1271 UBUS_METHOD("get", rpc_handle_get
, get_policy
),
1272 UBUS_METHOD("unset", rpc_handle_unset
, get_policy
),
1273 UBUS_METHOD("destroy", rpc_handle_destroy
, &sid_policy
),
1274 UBUS_METHOD("login", rpc_handle_login
, login_policy
),
1277 static struct ubus_object_type session_type
=
1278 UBUS_OBJECT_TYPE("luci-rpc-session", session_methods
);
1280 static struct ubus_object obj
= {
1282 .type
= &session_type
,
1283 .methods
= session_methods
,
1284 .n_methods
= ARRAY_SIZE(session_methods
),
1287 avl_init(&sessions
, avl_strcmp
, false, NULL
);
1289 /* setup the default session */
1290 ses
= rpc_session_new();
1293 strcpy(ses
->id
, RPC_DEFAULT_SESSION_ID
);
1294 rpc_login_setup_acls(ses
, NULL
);
1295 avl_insert(&sessions
, &ses
->avl
);
1298 return ubus_add_object(ctx
, &obj
);
1301 bool rpc_session_access(const char *sid
, const char *scope
,
1302 const char *object
, const char *function
)
1304 struct rpc_session
*ses
= rpc_session_get(sid
);
1309 return rpc_session_acl_allowed(ses
, scope
, object
, function
);
1312 void rpc_session_create_cb(struct rpc_session_cb
*cb
)
1315 list_add(&cb
->list
, &create_callbacks
);
1318 void rpc_session_destroy_cb(struct rpc_session_cb
*cb
)
1321 list_add(&cb
->list
, &destroy_callbacks
);
1324 void rpc_session_freeze(void)
1327 struct rpc_session
*ses
;
1328 char path
[PATH_MAX
];
1330 if (stat(RPC_SESSION_DIRECTORY
, &s
))
1331 mkdir(RPC_SESSION_DIRECTORY
, 0700);
1333 avl_for_each_element(&sessions
, ses
, avl
) {
1334 /* skip default session */
1335 if (!strcmp(ses
->id
, RPC_DEFAULT_SESSION_ID
))
1338 snprintf(path
, sizeof(path
) - 1, RPC_SESSION_DIRECTORY
"/%s", ses
->id
);
1339 rpc_session_to_blob(ses
, false);
1340 rpc_blob_to_file(path
, buf
.head
);
1344 void rpc_session_thaw(void)
1347 char path
[PATH_MAX
];
1349 struct blob_attr
*attr
;
1350 struct uci_context
*uci
;
1352 d
= opendir(RPC_SESSION_DIRECTORY
);
1357 uci
= uci_alloc_context();
1362 while ((e
= readdir(d
)) != NULL
) {
1363 if (!rpc_validate_sid(e
->d_name
))
1366 snprintf(path
, sizeof(path
) - 1,
1367 RPC_SESSION_DIRECTORY
"/%s", e
->d_name
);
1369 attr
= rpc_blob_from_file(path
);
1372 rpc_session_from_blob(uci
, attr
);
1381 uci_free_context(uci
);