2 * rpcd - UBUS RPC server
4 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
5 * Copyright (C) 2013 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>
34 #include <rpcd/session.h>
36 static struct avl_tree sessions
;
37 static struct blob_buf buf
;
39 static LIST_HEAD(create_callbacks
);
40 static LIST_HEAD(destroy_callbacks
);
42 static const struct blobmsg_policy new_policy
= {
43 .name
= "timeout", .type
= BLOBMSG_TYPE_INT32
46 static const struct blobmsg_policy sid_policy
= {
47 .name
= "sid", .type
= BLOBMSG_TYPE_STRING
55 static const struct blobmsg_policy set_policy
[__RPC_SS_MAX
] = {
56 [RPC_SS_SID
] = { .name
= "sid", .type
= BLOBMSG_TYPE_STRING
},
57 [RPC_SS_VALUES
] = { .name
= "values", .type
= BLOBMSG_TYPE_TABLE
},
65 static const struct blobmsg_policy get_policy
[__RPC_SG_MAX
] = {
66 [RPC_SG_SID
] = { .name
= "sid", .type
= BLOBMSG_TYPE_STRING
},
67 [RPC_SG_KEYS
] = { .name
= "keys", .type
= BLOBMSG_TYPE_ARRAY
},
76 static const struct blobmsg_policy acl_policy
[__RPC_SA_MAX
] = {
77 [RPC_SA_SID
] = { .name
= "sid", .type
= BLOBMSG_TYPE_STRING
},
78 [RPC_SA_SCOPE
] = { .name
= "scope", .type
= BLOBMSG_TYPE_STRING
},
79 [RPC_SA_OBJECTS
] = { .name
= "objects", .type
= BLOBMSG_TYPE_ARRAY
},
89 static const struct blobmsg_policy perm_policy
[__RPC_SP_MAX
] = {
90 [RPC_SP_SID
] = { .name
= "sid", .type
= BLOBMSG_TYPE_STRING
},
91 [RPC_SP_SCOPE
] = { .name
= "scope", .type
= BLOBMSG_TYPE_STRING
},
92 [RPC_SP_OBJECT
] = { .name
= "object", .type
= BLOBMSG_TYPE_STRING
},
93 [RPC_SP_FUNCTION
] = { .name
= "function", .type
= BLOBMSG_TYPE_STRING
},
103 static const struct blobmsg_policy dump_policy
[__RPC_DUMP_MAX
] = {
104 [RPC_DUMP_SID
] = { .name
= "sid", .type
= BLOBMSG_TYPE_STRING
},
105 [RPC_DUMP_TIMEOUT
] = { .name
= "timeout", .type
= BLOBMSG_TYPE_INT32
},
106 [RPC_DUMP_EXPIRES
] = { .name
= "expires", .type
= BLOBMSG_TYPE_INT32
},
107 [RPC_DUMP_DATA
] = { .name
= "data", .type
= BLOBMSG_TYPE_TABLE
},
116 static const struct blobmsg_policy login_policy
[__RPC_L_MAX
] = {
117 [RPC_L_USERNAME
] = { .name
= "username", .type
= BLOBMSG_TYPE_STRING
},
118 [RPC_L_PASSWORD
] = { .name
= "password", .type
= BLOBMSG_TYPE_STRING
},
119 [RPC_L_TIMEOUT
] = { .name
= "timeout", .type
= BLOBMSG_TYPE_INT32
},
123 * Keys in the AVL tree contain all pattern characters up to the first wildcard.
124 * To look up entries, start with the last entry that has a key less than or
125 * equal to the method name, then work backwards as long as the AVL key still
126 * matches its counterpart in the object name
128 #define uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
129 for (_acl = avl_find_le_element(_avl, _obj, _acl, avl); \
131 _acl = avl_is_first(_avl, &(_acl)->avl) ? NULL : \
132 avl_prev_element((_acl), avl))
134 #define uh_foreach_matching_acl(_acl, _avl, _obj, _func) \
135 uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
136 if (!strncmp((_acl)->object, _obj, (_acl)->sort_len) && \
137 !fnmatch((_acl)->object, (_obj), FNM_NOESCAPE) && \
138 !fnmatch((_acl)->function, (_func), FNM_NOESCAPE))
141 rpc_random(char *dest
)
143 unsigned char buf
[16] = { 0 };
147 f
= fopen("/dev/urandom", "r");
151 fread(buf
, 1, sizeof(buf
), f
);
154 for (i
= 0; i
< sizeof(buf
); i
++)
155 sprintf(dest
+ (i
<<1), "%02x", buf
[i
]);
159 rpc_session_dump_data(struct rpc_session
*ses
, struct blob_buf
*b
)
161 struct rpc_session_data
*d
;
163 avl_for_each_element(&ses
->data
, d
, avl
) {
164 blobmsg_add_field(b
, blobmsg_type(d
->attr
), blobmsg_name(d
->attr
),
165 blobmsg_data(d
->attr
), blobmsg_data_len(d
->attr
));
170 rpc_session_dump_acls(struct rpc_session
*ses
, struct blob_buf
*b
)
172 struct rpc_session_acl
*acl
;
173 struct rpc_session_acl_scope
*acl_scope
;
174 const char *lastobj
= NULL
;
175 const char *lastscope
= NULL
;
176 void *c
= NULL
, *d
= NULL
;
178 avl_for_each_element(&ses
->acls
, acl_scope
, avl
) {
179 if (!lastscope
|| strcmp(acl_scope
->avl
.key
, lastscope
))
181 if (c
) blobmsg_close_table(b
, c
);
182 c
= blobmsg_open_table(b
, acl_scope
->avl
.key
);
188 avl_for_each_element(&acl_scope
->acls
, acl
, avl
) {
189 if (!lastobj
|| strcmp(acl
->object
, lastobj
))
191 if (d
) blobmsg_close_array(b
, d
);
192 d
= blobmsg_open_array(b
, acl
->object
);
195 blobmsg_add_string(b
, NULL
, acl
->function
);
196 lastobj
= acl
->object
;
199 if (d
) blobmsg_close_array(b
, d
);
202 if (c
) blobmsg_close_table(b
, c
);
206 rpc_session_to_blob(struct rpc_session
*ses
)
210 blob_buf_init(&buf
, 0);
212 blobmsg_add_string(&buf
, "sid", ses
->id
);
213 blobmsg_add_u32(&buf
, "timeout", ses
->timeout
);
214 blobmsg_add_u32(&buf
, "expires", uloop_timeout_remaining(&ses
->t
) / 1000);
216 c
= blobmsg_open_table(&buf
, "data");
217 rpc_session_dump_data(ses
, &buf
);
218 blobmsg_close_table(&buf
, c
);
222 rpc_session_dump(struct rpc_session
*ses
, struct ubus_context
*ctx
,
223 struct ubus_request_data
*req
)
225 rpc_session_to_blob(ses
);
227 ubus_send_reply(ctx
, req
, buf
.head
);
231 rpc_touch_session(struct rpc_session
*ses
)
233 if (ses
->timeout
> 0)
234 uloop_timeout_set(&ses
->t
, ses
->timeout
* 1000);
238 rpc_session_destroy(struct rpc_session
*ses
)
240 struct rpc_session_acl
*acl
, *nacl
;
241 struct rpc_session_acl_scope
*acl_scope
, *nacl_scope
;
242 struct rpc_session_data
*data
, *ndata
;
243 struct rpc_session_cb
*cb
;
245 list_for_each_entry(cb
, &destroy_callbacks
, list
)
246 cb
->cb(ses
, cb
->priv
);
248 uloop_timeout_cancel(&ses
->t
);
250 avl_for_each_element_safe(&ses
->acls
, acl_scope
, avl
, nacl_scope
) {
251 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, nacl
)
254 avl_delete(&ses
->acls
, &acl_scope
->avl
);
258 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
261 avl_delete(&sessions
, &ses
->avl
);
265 static void rpc_session_timeout(struct uloop_timeout
*t
)
267 struct rpc_session
*ses
;
269 ses
= container_of(t
, struct rpc_session
, t
);
270 rpc_session_destroy(ses
);
273 static struct rpc_session
*
274 rpc_session_new(void)
276 struct rpc_session
*ses
;
278 ses
= calloc(1, sizeof(*ses
));
283 ses
->avl
.key
= ses
->id
;
285 avl_init(&ses
->acls
, avl_strcmp
, true, NULL
);
286 avl_init(&ses
->data
, avl_strcmp
, false, NULL
);
288 ses
->t
.cb
= rpc_session_timeout
;
293 static struct rpc_session
*
294 rpc_session_create(int timeout
)
296 struct rpc_session
*ses
;
297 struct rpc_session_cb
*cb
;
299 ses
= rpc_session_new();
306 ses
->timeout
= timeout
;
308 avl_insert(&sessions
, &ses
->avl
);
310 rpc_touch_session(ses
);
312 list_for_each_entry(cb
, &create_callbacks
, list
)
313 cb
->cb(ses
, cb
->priv
);
318 static struct rpc_session
*
319 rpc_session_get(const char *id
)
321 struct rpc_session
*ses
;
323 ses
= avl_find_element(&sessions
, id
, ses
, avl
);
327 rpc_touch_session(ses
);
332 rpc_handle_create(struct ubus_context
*ctx
, struct ubus_object
*obj
,
333 struct ubus_request_data
*req
, const char *method
,
334 struct blob_attr
*msg
)
336 struct rpc_session
*ses
;
337 struct blob_attr
*tb
;
338 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
340 blobmsg_parse(&new_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
342 timeout
= blobmsg_get_u32(tb
);
344 ses
= rpc_session_create(timeout
);
346 rpc_session_dump(ses
, ctx
, req
);
352 rpc_handle_list(struct ubus_context
*ctx
, struct ubus_object
*obj
,
353 struct ubus_request_data
*req
, const char *method
,
354 struct blob_attr
*msg
)
356 struct rpc_session
*ses
;
357 struct blob_attr
*tb
;
359 blobmsg_parse(&sid_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
362 avl_for_each_element(&sessions
, ses
, avl
)
363 rpc_session_dump(ses
, ctx
, req
);
367 ses
= rpc_session_get(blobmsg_data(tb
));
369 return UBUS_STATUS_NOT_FOUND
;
371 rpc_session_dump(ses
, ctx
, req
);
377 uh_id_len(const char *str
)
379 return strcspn(str
, "*?[");
383 rpc_session_grant(struct rpc_session
*ses
, struct ubus_context
*ctx
,
384 const char *scope
, const char *object
, const char *function
)
386 struct rpc_session_acl
*acl
;
387 struct rpc_session_acl_scope
*acl_scope
;
388 char *new_scope
, *new_obj
, *new_func
, *new_id
;
391 if (!object
|| !function
)
392 return UBUS_STATUS_INVALID_ARGUMENT
;
394 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
397 uh_foreach_matching_acl_prefix(acl
, &acl_scope
->acls
, object
, function
) {
398 if (!strcmp(acl
->object
, object
) &&
399 !strcmp(acl
->function
, function
))
405 acl_scope
= calloc_a(sizeof(*acl_scope
),
406 &new_scope
, strlen(scope
) + 1);
409 return UBUS_STATUS_UNKNOWN_ERROR
;
411 acl_scope
->avl
.key
= strcpy(new_scope
, scope
);
412 avl_init(&acl_scope
->acls
, avl_strcmp
, true, NULL
);
413 avl_insert(&ses
->acls
, &acl_scope
->avl
);
416 id_len
= uh_id_len(object
);
417 acl
= calloc_a(sizeof(*acl
),
418 &new_obj
, strlen(object
) + 1,
419 &new_func
, strlen(function
) + 1,
420 &new_id
, id_len
+ 1);
423 return UBUS_STATUS_UNKNOWN_ERROR
;
425 acl
->object
= strcpy(new_obj
, object
);
426 acl
->function
= strcpy(new_func
, function
);
427 acl
->avl
.key
= strncpy(new_id
, object
, id_len
);
428 avl_insert(&acl_scope
->acls
, &acl
->avl
);
434 rpc_session_revoke(struct rpc_session
*ses
, struct ubus_context
*ctx
,
435 const char *scope
, const char *object
, const char *function
)
437 struct rpc_session_acl
*acl
, *next
;
438 struct rpc_session_acl_scope
*acl_scope
;
442 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
447 if (!object
&& !function
) {
448 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, next
)
450 avl_delete(&ses
->acls
, &acl_scope
->avl
);
455 id_len
= uh_id_len(object
);
456 id
= alloca(id_len
+ 1);
457 strncpy(id
, object
, id_len
);
460 acl
= avl_find_element(&acl_scope
->acls
, id
, acl
, avl
);
462 if (!avl_is_last(&acl_scope
->acls
, &acl
->avl
))
463 next
= avl_next_element(acl
, avl
);
467 if (strcmp(id
, acl
->avl
.key
) != 0)
470 if (!strcmp(acl
->object
, object
) &&
471 !strcmp(acl
->function
, function
)) {
472 avl_delete(&acl_scope
->acls
, &acl
->avl
);
478 if (avl_is_empty(&acl_scope
->acls
)) {
479 avl_delete(&ses
->acls
, &acl_scope
->avl
);
488 rpc_handle_acl(struct ubus_context
*ctx
, struct ubus_object
*obj
,
489 struct ubus_request_data
*req
, const char *method
,
490 struct blob_attr
*msg
)
492 struct rpc_session
*ses
;
493 struct blob_attr
*tb
[__RPC_SA_MAX
];
494 struct blob_attr
*attr
, *sattr
;
495 const char *object
, *function
;
496 const char *scope
= "ubus";
499 int (*cb
)(struct rpc_session
*ses
, struct ubus_context
*ctx
,
500 const char *scope
, const char *object
, const char *function
);
502 blobmsg_parse(acl_policy
, __RPC_SA_MAX
, tb
, blob_data(msg
), blob_len(msg
));
505 return UBUS_STATUS_INVALID_ARGUMENT
;
507 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SA_SID
]));
509 return UBUS_STATUS_NOT_FOUND
;
511 if (tb
[RPC_SA_SCOPE
])
512 scope
= blobmsg_data(tb
[RPC_SA_SCOPE
]);
514 if (!strcmp(method
, "grant"))
515 cb
= rpc_session_grant
;
517 cb
= rpc_session_revoke
;
519 if (!tb
[RPC_SA_OBJECTS
])
520 return cb(ses
, ctx
, scope
, NULL
, NULL
);
522 blobmsg_for_each_attr(attr
, tb
[RPC_SA_OBJECTS
], rem1
) {
523 if (blob_id(attr
) != BLOBMSG_TYPE_ARRAY
)
529 blobmsg_for_each_attr(sattr
, attr
, rem2
) {
530 if (blob_id(sattr
) != BLOBMSG_TYPE_STRING
)
534 object
= blobmsg_data(sattr
);
536 function
= blobmsg_data(sattr
);
541 if (object
&& function
)
542 cb(ses
, ctx
, scope
, object
, function
);
549 rpc_session_acl_allowed(struct rpc_session
*ses
, const char *scope
,
550 const char *obj
, const char *fun
)
552 struct rpc_session_acl
*acl
;
553 struct rpc_session_acl_scope
*acl_scope
;
555 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
558 uh_foreach_matching_acl(acl
, &acl_scope
->acls
, obj
, fun
)
566 rpc_handle_access(struct ubus_context
*ctx
, struct ubus_object
*obj
,
567 struct ubus_request_data
*req
, const char *method
,
568 struct blob_attr
*msg
)
570 struct rpc_session
*ses
;
571 struct blob_attr
*tb
[__RPC_SP_MAX
];
572 const char *scope
= "ubus";
575 blobmsg_parse(perm_policy
, __RPC_SP_MAX
, tb
, blob_data(msg
), blob_len(msg
));
577 if (!tb
[RPC_SP_SID
] || !tb
[RPC_SP_OBJECT
] || !tb
[RPC_SP_FUNCTION
])
578 return UBUS_STATUS_INVALID_ARGUMENT
;
580 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SP_SID
]));
582 return UBUS_STATUS_NOT_FOUND
;
584 if (tb
[RPC_SP_SCOPE
])
585 scope
= blobmsg_data(tb
[RPC_SP_SCOPE
]);
587 allow
= rpc_session_acl_allowed(ses
, scope
,
588 blobmsg_data(tb
[RPC_SP_OBJECT
]),
589 blobmsg_data(tb
[RPC_SP_FUNCTION
]));
591 blob_buf_init(&buf
, 0);
592 blobmsg_add_u8(&buf
, "access", allow
);
593 ubus_send_reply(ctx
, req
, buf
.head
);
599 rpc_session_set(struct rpc_session
*ses
, const char *key
, struct blob_attr
*val
)
601 struct rpc_session_data
*data
;
603 data
= avl_find_element(&ses
->data
, key
, data
, avl
);
605 avl_delete(&ses
->data
, &data
->avl
);
609 data
= calloc(1, sizeof(*data
) + blob_pad_len(val
));
613 memcpy(data
->attr
, val
, blob_pad_len(val
));
614 data
->avl
.key
= blobmsg_name(data
->attr
);
615 avl_insert(&ses
->data
, &data
->avl
);
619 rpc_handle_set(struct ubus_context
*ctx
, struct ubus_object
*obj
,
620 struct ubus_request_data
*req
, const char *method
,
621 struct blob_attr
*msg
)
623 struct rpc_session
*ses
;
624 struct blob_attr
*tb
[__RPC_SA_MAX
];
625 struct blob_attr
*attr
;
628 blobmsg_parse(set_policy
, __RPC_SS_MAX
, tb
, blob_data(msg
), blob_len(msg
));
630 if (!tb
[RPC_SS_SID
] || !tb
[RPC_SS_VALUES
])
631 return UBUS_STATUS_INVALID_ARGUMENT
;
633 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SS_SID
]));
635 return UBUS_STATUS_NOT_FOUND
;
637 blobmsg_for_each_attr(attr
, tb
[RPC_SS_VALUES
], rem
) {
638 if (!blobmsg_name(attr
)[0])
641 rpc_session_set(ses
, blobmsg_name(attr
), attr
);
648 rpc_handle_get(struct ubus_context
*ctx
, struct ubus_object
*obj
,
649 struct ubus_request_data
*req
, const char *method
,
650 struct blob_attr
*msg
)
652 struct rpc_session
*ses
;
653 struct rpc_session_data
*data
;
654 struct blob_attr
*tb
[__RPC_SA_MAX
];
655 struct blob_attr
*attr
;
659 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
662 return UBUS_STATUS_INVALID_ARGUMENT
;
664 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
666 return UBUS_STATUS_NOT_FOUND
;
668 blob_buf_init(&buf
, 0);
669 c
= blobmsg_open_table(&buf
, "values");
672 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
673 if (blob_id(attr
) != BLOBMSG_TYPE_STRING
)
676 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
680 blobmsg_add_field(&buf
, blobmsg_type(data
->attr
),
681 blobmsg_name(data
->attr
),
682 blobmsg_data(data
->attr
),
683 blobmsg_data_len(data
->attr
));
686 rpc_session_dump_data(ses
, &buf
);
688 blobmsg_close_table(&buf
, c
);
689 ubus_send_reply(ctx
, req
, buf
.head
);
695 rpc_handle_unset(struct ubus_context
*ctx
, struct ubus_object
*obj
,
696 struct ubus_request_data
*req
, const char *method
,
697 struct blob_attr
*msg
)
699 struct rpc_session
*ses
;
700 struct rpc_session_data
*data
, *ndata
;
701 struct blob_attr
*tb
[__RPC_SA_MAX
];
702 struct blob_attr
*attr
;
705 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
708 return UBUS_STATUS_INVALID_ARGUMENT
;
710 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
712 return UBUS_STATUS_NOT_FOUND
;
714 if (!tb
[RPC_SG_KEYS
]) {
715 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
720 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
721 if (blob_id(attr
) != BLOBMSG_TYPE_STRING
)
724 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
728 avl_delete(&ses
->data
, &data
->avl
);
736 rpc_handle_destroy(struct ubus_context
*ctx
, struct ubus_object
*obj
,
737 struct ubus_request_data
*req
, const char *method
,
738 struct blob_attr
*msg
)
740 struct rpc_session
*ses
;
741 struct blob_attr
*tb
;
743 blobmsg_parse(&sid_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
746 return UBUS_STATUS_INVALID_ARGUMENT
;
748 if (!strcmp(blobmsg_get_string(tb
), RPC_DEFAULT_SESSION_ID
))
749 return UBUS_STATUS_PERMISSION_DENIED
;
751 ses
= rpc_session_get(blobmsg_data(tb
));
753 return UBUS_STATUS_NOT_FOUND
;
755 rpc_session_destroy(ses
);
762 rpc_login_test_password(const char *hash
, const char *password
)
766 /* password is not set */
767 if (!hash
|| !*hash
|| !strcmp(hash
, "!") || !strcmp(hash
, "x"))
772 /* password hash refers to shadow/passwd */
773 else if (!strncmp(hash
, "$p$", 3))
776 struct spwd
*sp
= getspnam(hash
+ 3);
781 return rpc_login_test_password(sp
->sp_pwdp
, password
);
783 struct passwd
*pw
= getpwnam(hash
+ 3);
788 return rpc_login_test_password(pw
->pw_passwd
, password
);
792 crypt_hash
= crypt(password
, hash
);
794 return !strcmp(crypt_hash
, hash
);
797 static struct uci_section
*
798 rpc_login_test_login(struct uci_context
*uci
,
799 const char *username
, const char *password
)
801 struct uci_package
*p
= NULL
;
802 struct uci_section
*s
;
803 struct uci_element
*e
;
804 struct uci_ptr ptr
= { .package
= "rpcd" };
806 uci_load(uci
, ptr
.package
, &p
);
811 uci_foreach_element(&p
->sections
, e
)
813 s
= uci_to_section(e
);
815 if (strcmp(s
->type
, "login"))
818 ptr
.section
= s
->e
.name
;
821 /* test for matching username */
822 ptr
.option
= "username";
825 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
828 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
831 if (strcmp(ptr
.o
->v
.string
, username
))
834 /* If password is NULL, we're restoring ACLs for an existing session,
835 * in this case do not check the password again. */
839 /* test for matching password */
840 ptr
.option
= "password";
843 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
846 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
849 if (rpc_login_test_password(ptr
.o
->v
.string
, password
))
857 rpc_login_test_permission(struct uci_section
*s
,
858 const char *perm
, const char *group
)
860 struct uci_option
*o
;
861 struct uci_element
*e
, *l
;
863 /* If the login section is not provided, we're setting up acls for the
864 * default session, in this case uncondionally allow access to the
865 * "unauthenticated" access group */
867 return !strcmp(group
, "unauthenticated");
870 uci_foreach_element(&s
->options
, e
)
872 o
= uci_to_option(e
);
874 if (o
->type
!= UCI_TYPE_LIST
)
877 if (strcmp(o
->e
.name
, perm
))
880 uci_foreach_element(&o
->v
.list
, l
)
881 if (l
->name
&& !fnmatch(l
->name
, group
, 0))
885 /* make sure that write permission implies read permission */
886 if (!strcmp(perm
, "read"))
887 return rpc_login_test_permission(s
, "write", group
);
893 rpc_login_setup_acl_scope(struct rpc_session
*ses
,
894 struct blob_attr
*acl_perm
,
895 struct blob_attr
*acl_scope
)
897 struct blob_attr
*acl_obj
, *acl_func
;
901 * Parse ACL scopes in table notation.
911 if (blob_id(acl_scope
) == BLOBMSG_TYPE_TABLE
) {
912 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
913 if (blob_id(acl_obj
) != BLOBMSG_TYPE_ARRAY
)
916 blobmsg_for_each_attr(acl_func
, acl_obj
, rem2
) {
917 if (blob_id(acl_func
) != BLOBMSG_TYPE_STRING
)
920 rpc_session_grant(ses
, NULL
, blobmsg_name(acl_scope
),
921 blobmsg_name(acl_obj
),
922 blobmsg_data(acl_func
));
928 * Parse ACL scopes in array notation. The permission ("read" or "write")
929 * will be used as function name for each object.
937 else if (blob_id(acl_scope
) == BLOBMSG_TYPE_ARRAY
) {
938 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
939 if (blob_id(acl_obj
) != BLOBMSG_TYPE_STRING
)
942 rpc_session_grant(ses
, NULL
, blobmsg_name(acl_scope
),
943 blobmsg_data(acl_obj
),
944 blobmsg_name(acl_perm
));
950 rpc_login_setup_acl_file(struct rpc_session
*ses
, struct uci_section
*login
,
953 struct blob_buf acl
= { 0 };
954 struct blob_attr
*acl_group
, *acl_perm
, *acl_scope
;
957 blob_buf_init(&acl
, 0);
959 if (!blobmsg_add_json_from_file(&acl
, path
)) {
960 fprintf(stderr
, "Failed to parse %s\n", path
);
964 /* Iterate access groups in toplevel object */
965 blob_for_each_attr(acl_group
, acl
.head
, rem
) {
966 /* Iterate permission objects in each access group object */
967 blobmsg_for_each_attr(acl_perm
, acl_group
, rem2
) {
968 if (blob_id(acl_perm
) != BLOBMSG_TYPE_TABLE
)
971 /* Only "read" and "write" permissions are defined */
972 if (strcmp(blobmsg_name(acl_perm
), "read") &&
973 strcmp(blobmsg_name(acl_perm
), "write"))
977 * Check if the current user context specifies the current
978 * "read" or "write" permission in the given access group.
980 if (!rpc_login_test_permission(login
, blobmsg_name(acl_perm
),
981 blobmsg_name(acl_group
)))
984 /* Iterate scope objects within the permission object */
985 blobmsg_for_each_attr(acl_scope
, acl_perm
, rem3
) {
986 /* Setup the scopes of the access group */
987 rpc_login_setup_acl_scope(ses
, acl_perm
, acl_scope
);
990 * Add the access group itself as object to the "access-group"
991 * meta scope and the the permission level ("read" or "write")
1005 * This allows session clients to easily query the allowed
1006 * access groups without having to test access of each single
1007 * <scope>/<object>/<function> tuple defined in a group.
1009 rpc_session_grant(ses
, NULL
, "access-group",
1010 blobmsg_name(acl_group
),
1011 blobmsg_name(acl_perm
));
1017 blob_buf_free(&acl
);
1021 rpc_login_setup_acls(struct rpc_session
*ses
, struct uci_section
*login
)
1026 if (glob(RPC_SESSION_ACL_DIR
"/*.json", 0, NULL
, &gl
))
1029 for (i
= 0; i
< gl
.gl_pathc
; i
++)
1030 rpc_login_setup_acl_file(ses
, login
, gl
.gl_pathv
[i
]);
1036 rpc_handle_login(struct ubus_context
*ctx
, struct ubus_object
*obj
,
1037 struct ubus_request_data
*req
, const char *method
,
1038 struct blob_attr
*msg
)
1040 struct uci_context
*uci
= NULL
;
1041 struct uci_section
*login
;
1042 struct rpc_session
*ses
;
1043 struct blob_attr
*tb
[__RPC_L_MAX
];
1044 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
1047 blobmsg_parse(login_policy
, __RPC_L_MAX
, tb
, blob_data(msg
), blob_len(msg
));
1049 if (!tb
[RPC_L_USERNAME
] || !tb
[RPC_L_PASSWORD
]) {
1050 rv
= UBUS_STATUS_INVALID_ARGUMENT
;
1054 uci
= uci_alloc_context();
1057 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1061 login
= rpc_login_test_login(uci
, blobmsg_get_string(tb
[RPC_L_USERNAME
]),
1062 blobmsg_get_string(tb
[RPC_L_PASSWORD
]));
1065 rv
= UBUS_STATUS_PERMISSION_DENIED
;
1069 if (tb
[RPC_L_TIMEOUT
])
1070 timeout
= blobmsg_get_u32(tb
[RPC_L_TIMEOUT
]);
1072 ses
= rpc_session_create(timeout
);
1075 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1079 rpc_login_setup_acls(ses
, login
);
1081 rpc_session_set(ses
, "user", tb
[RPC_L_USERNAME
]);
1082 rpc_session_dump(ses
, ctx
, req
);
1086 uci_free_context(uci
);
1093 rpc_validate_sid(const char *id
)
1098 if (strlen(id
) != RPC_SID_LEN
)
1102 if (!isxdigit(*id
++))
1109 rpc_blob_to_file(const char *path
, struct blob_attr
*attr
)
1113 fd
= open(path
, O_WRONLY
| O_CREAT
| O_EXCL
, 0600);
1118 len
= write(fd
, attr
, blob_pad_len(attr
));
1122 if (len
!= blob_pad_len(attr
))
1131 static struct blob_attr
*
1132 rpc_blob_from_file(const char *path
)
1136 struct blob_attr head
, *attr
= NULL
;
1138 if (stat(path
, &s
) || !S_ISREG(s
.st_mode
))
1141 fd
= open(path
, O_RDONLY
);
1146 len
= read(fd
, &head
, sizeof(head
));
1148 if (len
!= sizeof(head
) || blob_pad_len(&head
) != s
.st_size
)
1151 attr
= calloc(1, s
.st_size
);
1156 memcpy(attr
, &head
, sizeof(head
));
1158 len
+= read(fd
, (char *)attr
+ sizeof(head
), s
.st_size
- sizeof(head
));
1160 if (len
!= blob_pad_len(&head
))
1176 rpc_session_from_blob(struct uci_context
*uci
, struct blob_attr
*attr
)
1179 const char *user
= NULL
;
1180 struct rpc_session
*ses
;
1181 struct uci_section
*login
;
1182 struct blob_attr
*tb
[__RPC_DUMP_MAX
], *data
;
1184 blobmsg_parse(dump_policy
, __RPC_DUMP_MAX
, tb
,
1185 blob_data(attr
), blob_len(attr
));
1187 for (i
= 0; i
< __RPC_DUMP_MAX
; i
++)
1191 ses
= rpc_session_new();
1196 memcpy(ses
->id
, blobmsg_data(tb
[RPC_DUMP_SID
]), RPC_SID_LEN
);
1198 ses
->timeout
= blobmsg_get_u32(tb
[RPC_DUMP_TIMEOUT
]);
1200 blobmsg_for_each_attr(data
, tb
[RPC_DUMP_DATA
], rem
) {
1201 rpc_session_set(ses
, blobmsg_name(data
), data
);
1203 if (!strcmp(blobmsg_name(data
), "username"))
1204 user
= blobmsg_get_string(data
);
1208 login
= rpc_login_test_login(uci
, user
, NULL
);
1210 rpc_login_setup_acls(ses
, login
);
1213 avl_insert(&sessions
, &ses
->avl
);
1215 uloop_timeout_set(&ses
->t
, blobmsg_get_u32(tb
[RPC_DUMP_EXPIRES
]) * 1000);
1220 int rpc_session_api_init(struct ubus_context
*ctx
)
1222 struct rpc_session
*ses
;
1224 static const struct ubus_method session_methods
[] = {
1225 UBUS_METHOD("create", rpc_handle_create
, &new_policy
),
1226 UBUS_METHOD("list", rpc_handle_list
, &sid_policy
),
1227 UBUS_METHOD("grant", rpc_handle_acl
, acl_policy
),
1228 UBUS_METHOD("revoke", rpc_handle_acl
, acl_policy
),
1229 UBUS_METHOD("access", rpc_handle_access
, perm_policy
),
1230 UBUS_METHOD("set", rpc_handle_set
, set_policy
),
1231 UBUS_METHOD("get", rpc_handle_get
, get_policy
),
1232 UBUS_METHOD("unset", rpc_handle_unset
, get_policy
),
1233 UBUS_METHOD("destroy", rpc_handle_destroy
, &sid_policy
),
1234 UBUS_METHOD("login", rpc_handle_login
, login_policy
),
1237 static struct ubus_object_type session_type
=
1238 UBUS_OBJECT_TYPE("luci-rpc-session", session_methods
);
1240 static struct ubus_object obj
= {
1242 .type
= &session_type
,
1243 .methods
= session_methods
,
1244 .n_methods
= ARRAY_SIZE(session_methods
),
1247 avl_init(&sessions
, avl_strcmp
, false, NULL
);
1249 /* setup the default session */
1250 ses
= rpc_session_new();
1253 strcpy(ses
->id
, RPC_DEFAULT_SESSION_ID
);
1254 rpc_login_setup_acls(ses
, NULL
);
1255 avl_insert(&sessions
, &ses
->avl
);
1258 return ubus_add_object(ctx
, &obj
);
1261 bool rpc_session_access(const char *sid
, const char *scope
,
1262 const char *object
, const char *function
)
1264 struct rpc_session
*ses
= rpc_session_get(sid
);
1269 return rpc_session_acl_allowed(ses
, scope
, object
, function
);
1272 void rpc_session_create_cb(struct rpc_session_cb
*cb
)
1275 list_add(&cb
->list
, &create_callbacks
);
1278 void rpc_session_destroy_cb(struct rpc_session_cb
*cb
)
1281 list_add(&cb
->list
, &destroy_callbacks
);
1284 void rpc_session_freeze(void)
1287 struct rpc_session
*ses
;
1288 char path
[PATH_MAX
];
1290 if (stat(RPC_SESSION_DIRECTORY
, &s
))
1291 mkdir(RPC_SESSION_DIRECTORY
, 0700);
1293 avl_for_each_element(&sessions
, ses
, avl
) {
1294 /* skip default session */
1295 if (!strcmp(ses
->id
, RPC_DEFAULT_SESSION_ID
))
1298 snprintf(path
, sizeof(path
) - 1, RPC_SESSION_DIRECTORY
"/%s", ses
->id
);
1299 rpc_session_to_blob(ses
);
1300 rpc_blob_to_file(path
, buf
.head
);
1304 void rpc_session_thaw(void)
1307 char path
[PATH_MAX
];
1309 struct blob_attr
*attr
;
1310 struct uci_context
*uci
;
1312 d
= opendir(RPC_SESSION_DIRECTORY
);
1317 uci
= uci_alloc_context();
1322 while ((e
= readdir(d
)) != NULL
) {
1323 if (!rpc_validate_sid(e
->d_name
))
1326 snprintf(path
, sizeof(path
) - 1,
1327 RPC_SESSION_DIRECTORY
"/%s", e
->d_name
);
1329 attr
= rpc_blob_from_file(path
);
1332 rpc_session_from_blob(uci
, attr
);
1341 uci_free_context(uci
);