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>
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
= "ubus_rpc_session", .type
= BLOBMSG_TYPE_STRING
55 static const struct blobmsg_policy set_policy
[__RPC_SS_MAX
] = {
56 [RPC_SS_SID
] = { .name
= "ubus_rpc_session", .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
= "ubus_rpc_session", .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
= "ubus_rpc_session", .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
= "ubus_rpc_session", .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
= "ubus_rpc_session", .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
, bool acls
)
210 blob_buf_init(&buf
, 0);
212 blobmsg_add_string(&buf
, "ubus_rpc_session", ses
->id
);
213 blobmsg_add_u32(&buf
, "timeout", ses
->timeout
);
214 blobmsg_add_u32(&buf
, "expires", uloop_timeout_remaining(&ses
->t
) / 1000);
217 c
= blobmsg_open_table(&buf
, "acls");
218 rpc_session_dump_acls(ses
, &buf
);
219 blobmsg_close_table(&buf
, c
);
222 c
= blobmsg_open_table(&buf
, "data");
223 rpc_session_dump_data(ses
, &buf
);
224 blobmsg_close_table(&buf
, c
);
228 rpc_session_dump(struct rpc_session
*ses
, struct ubus_context
*ctx
,
229 struct ubus_request_data
*req
)
231 rpc_session_to_blob(ses
, true);
233 ubus_send_reply(ctx
, req
, buf
.head
);
237 rpc_touch_session(struct rpc_session
*ses
)
239 if (ses
->timeout
> 0)
240 uloop_timeout_set(&ses
->t
, ses
->timeout
* 1000);
244 rpc_session_destroy(struct rpc_session
*ses
)
246 struct rpc_session_acl
*acl
, *nacl
;
247 struct rpc_session_acl_scope
*acl_scope
, *nacl_scope
;
248 struct rpc_session_data
*data
, *ndata
;
249 struct rpc_session_cb
*cb
;
251 list_for_each_entry(cb
, &destroy_callbacks
, list
)
252 cb
->cb(ses
, cb
->priv
);
254 uloop_timeout_cancel(&ses
->t
);
256 avl_for_each_element_safe(&ses
->acls
, acl_scope
, avl
, nacl_scope
) {
257 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, nacl
)
260 avl_delete(&ses
->acls
, &acl_scope
->avl
);
264 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
267 avl_delete(&sessions
, &ses
->avl
);
271 static void rpc_session_timeout(struct uloop_timeout
*t
)
273 struct rpc_session
*ses
;
275 ses
= container_of(t
, struct rpc_session
, t
);
276 rpc_session_destroy(ses
);
279 static struct rpc_session
*
280 rpc_session_new(void)
282 struct rpc_session
*ses
;
284 ses
= calloc(1, sizeof(*ses
));
289 ses
->avl
.key
= ses
->id
;
291 avl_init(&ses
->acls
, avl_strcmp
, true, NULL
);
292 avl_init(&ses
->data
, avl_strcmp
, false, NULL
);
294 ses
->t
.cb
= rpc_session_timeout
;
299 static struct rpc_session
*
300 rpc_session_create(int timeout
)
302 struct rpc_session
*ses
;
303 struct rpc_session_cb
*cb
;
305 ses
= rpc_session_new();
312 ses
->timeout
= timeout
;
314 avl_insert(&sessions
, &ses
->avl
);
316 rpc_touch_session(ses
);
318 list_for_each_entry(cb
, &create_callbacks
, list
)
319 cb
->cb(ses
, cb
->priv
);
324 static struct rpc_session
*
325 rpc_session_get(const char *id
)
327 struct rpc_session
*ses
;
329 ses
= avl_find_element(&sessions
, id
, ses
, avl
);
333 rpc_touch_session(ses
);
338 rpc_handle_create(struct ubus_context
*ctx
, struct ubus_object
*obj
,
339 struct ubus_request_data
*req
, const char *method
,
340 struct blob_attr
*msg
)
342 struct rpc_session
*ses
;
343 struct blob_attr
*tb
;
344 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
346 blobmsg_parse(&new_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
348 timeout
= blobmsg_get_u32(tb
);
350 ses
= rpc_session_create(timeout
);
352 rpc_session_dump(ses
, ctx
, req
);
358 rpc_handle_list(struct ubus_context
*ctx
, struct ubus_object
*obj
,
359 struct ubus_request_data
*req
, const char *method
,
360 struct blob_attr
*msg
)
362 struct rpc_session
*ses
;
363 struct blob_attr
*tb
;
365 blobmsg_parse(&sid_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
368 avl_for_each_element(&sessions
, ses
, avl
)
369 rpc_session_dump(ses
, ctx
, req
);
373 ses
= rpc_session_get(blobmsg_data(tb
));
375 return UBUS_STATUS_NOT_FOUND
;
377 rpc_session_dump(ses
, ctx
, req
);
383 uh_id_len(const char *str
)
385 return strcspn(str
, "*?[");
389 rpc_session_grant(struct rpc_session
*ses
,
390 const char *scope
, const char *object
, const char *function
)
392 struct rpc_session_acl
*acl
;
393 struct rpc_session_acl_scope
*acl_scope
;
394 char *new_scope
, *new_obj
, *new_func
, *new_id
;
397 if (!object
|| !function
)
398 return UBUS_STATUS_INVALID_ARGUMENT
;
400 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
403 uh_foreach_matching_acl_prefix(acl
, &acl_scope
->acls
, object
, function
) {
404 if (!strcmp(acl
->object
, object
) &&
405 !strcmp(acl
->function
, function
))
411 acl_scope
= calloc_a(sizeof(*acl_scope
),
412 &new_scope
, strlen(scope
) + 1);
415 return UBUS_STATUS_UNKNOWN_ERROR
;
417 acl_scope
->avl
.key
= strcpy(new_scope
, scope
);
418 avl_init(&acl_scope
->acls
, avl_strcmp
, true, NULL
);
419 avl_insert(&ses
->acls
, &acl_scope
->avl
);
422 id_len
= uh_id_len(object
);
423 acl
= calloc_a(sizeof(*acl
),
424 &new_obj
, strlen(object
) + 1,
425 &new_func
, strlen(function
) + 1,
426 &new_id
, id_len
+ 1);
429 return UBUS_STATUS_UNKNOWN_ERROR
;
431 acl
->object
= strcpy(new_obj
, object
);
432 acl
->function
= strcpy(new_func
, function
);
433 acl
->avl
.key
= strncpy(new_id
, object
, id_len
);
434 avl_insert(&acl_scope
->acls
, &acl
->avl
);
440 rpc_session_revoke(struct rpc_session
*ses
,
441 const char *scope
, const char *object
, const char *function
)
443 struct rpc_session_acl
*acl
, *next
;
444 struct rpc_session_acl_scope
*acl_scope
;
448 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
453 if (!object
&& !function
) {
454 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, next
)
456 avl_delete(&ses
->acls
, &acl_scope
->avl
);
461 id_len
= uh_id_len(object
);
462 id
= alloca(id_len
+ 1);
463 strncpy(id
, object
, id_len
);
466 acl
= avl_find_element(&acl_scope
->acls
, id
, acl
, avl
);
468 if (!avl_is_last(&acl_scope
->acls
, &acl
->avl
))
469 next
= avl_next_element(acl
, avl
);
473 if (strcmp(id
, acl
->avl
.key
) != 0)
476 if (!strcmp(acl
->object
, object
) &&
477 !strcmp(acl
->function
, function
)) {
478 avl_delete(&acl_scope
->acls
, &acl
->avl
);
484 if (avl_is_empty(&acl_scope
->acls
)) {
485 avl_delete(&ses
->acls
, &acl_scope
->avl
);
494 rpc_handle_acl(struct ubus_context
*ctx
, struct ubus_object
*obj
,
495 struct ubus_request_data
*req
, const char *method
,
496 struct blob_attr
*msg
)
498 struct rpc_session
*ses
;
499 struct blob_attr
*tb
[__RPC_SA_MAX
];
500 struct blob_attr
*attr
, *sattr
;
501 const char *object
, *function
;
502 const char *scope
= "ubus";
505 int (*cb
)(struct rpc_session
*ses
,
506 const char *scope
, const char *object
, const char *function
);
508 blobmsg_parse(acl_policy
, __RPC_SA_MAX
, tb
, blob_data(msg
), blob_len(msg
));
511 return UBUS_STATUS_INVALID_ARGUMENT
;
513 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SA_SID
]));
515 return UBUS_STATUS_NOT_FOUND
;
517 if (tb
[RPC_SA_SCOPE
])
518 scope
= blobmsg_data(tb
[RPC_SA_SCOPE
]);
520 if (!strcmp(method
, "grant"))
521 cb
= rpc_session_grant
;
523 cb
= rpc_session_revoke
;
525 if (!tb
[RPC_SA_OBJECTS
])
526 return cb(ses
, scope
, NULL
, NULL
);
528 blobmsg_for_each_attr(attr
, tb
[RPC_SA_OBJECTS
], rem1
) {
529 if (blobmsg_type(attr
) != BLOBMSG_TYPE_ARRAY
)
535 blobmsg_for_each_attr(sattr
, attr
, rem2
) {
536 if (blobmsg_type(sattr
) != BLOBMSG_TYPE_STRING
)
540 object
= blobmsg_data(sattr
);
542 function
= blobmsg_data(sattr
);
547 if (object
&& function
)
548 cb(ses
, scope
, object
, function
);
555 rpc_session_acl_allowed(struct rpc_session
*ses
, const char *scope
,
556 const char *obj
, const char *fun
)
558 struct rpc_session_acl
*acl
;
559 struct rpc_session_acl_scope
*acl_scope
;
561 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
564 uh_foreach_matching_acl(acl
, &acl_scope
->acls
, obj
, fun
)
572 rpc_handle_access(struct ubus_context
*ctx
, struct ubus_object
*obj
,
573 struct ubus_request_data
*req
, const char *method
,
574 struct blob_attr
*msg
)
576 struct rpc_session
*ses
;
577 struct blob_attr
*tb
[__RPC_SP_MAX
];
578 const char *scope
= "ubus";
581 blobmsg_parse(perm_policy
, __RPC_SP_MAX
, tb
, blob_data(msg
), blob_len(msg
));
584 return UBUS_STATUS_INVALID_ARGUMENT
;
586 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SP_SID
]));
588 return UBUS_STATUS_NOT_FOUND
;
590 blob_buf_init(&buf
, 0);
592 if (tb
[RPC_SP_OBJECT
] && tb
[RPC_SP_FUNCTION
])
594 if (tb
[RPC_SP_SCOPE
])
595 scope
= blobmsg_data(tb
[RPC_SP_SCOPE
]);
597 allow
= rpc_session_acl_allowed(ses
, scope
,
598 blobmsg_data(tb
[RPC_SP_OBJECT
]),
599 blobmsg_data(tb
[RPC_SP_FUNCTION
]));
601 blobmsg_add_u8(&buf
, "access", allow
);
605 rpc_session_dump_acls(ses
, &buf
);
608 ubus_send_reply(ctx
, req
, buf
.head
);
614 rpc_session_set(struct rpc_session
*ses
, const char *key
, struct blob_attr
*val
)
616 struct rpc_session_data
*data
;
618 data
= avl_find_element(&ses
->data
, key
, data
, avl
);
620 avl_delete(&ses
->data
, &data
->avl
);
624 data
= calloc(1, sizeof(*data
) + blob_pad_len(val
));
628 memcpy(data
->attr
, val
, blob_pad_len(val
));
629 data
->avl
.key
= blobmsg_name(data
->attr
);
630 avl_insert(&ses
->data
, &data
->avl
);
634 rpc_handle_set(struct ubus_context
*ctx
, struct ubus_object
*obj
,
635 struct ubus_request_data
*req
, const char *method
,
636 struct blob_attr
*msg
)
638 struct rpc_session
*ses
;
639 struct blob_attr
*tb
[__RPC_SS_MAX
];
640 struct blob_attr
*attr
;
643 blobmsg_parse(set_policy
, __RPC_SS_MAX
, tb
, blob_data(msg
), blob_len(msg
));
645 if (!tb
[RPC_SS_SID
] || !tb
[RPC_SS_VALUES
])
646 return UBUS_STATUS_INVALID_ARGUMENT
;
648 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SS_SID
]));
650 return UBUS_STATUS_NOT_FOUND
;
652 blobmsg_for_each_attr(attr
, tb
[RPC_SS_VALUES
], rem
) {
653 if (!blobmsg_name(attr
)[0])
656 rpc_session_set(ses
, blobmsg_name(attr
), attr
);
663 rpc_handle_get(struct ubus_context
*ctx
, struct ubus_object
*obj
,
664 struct ubus_request_data
*req
, const char *method
,
665 struct blob_attr
*msg
)
667 struct rpc_session
*ses
;
668 struct rpc_session_data
*data
;
669 struct blob_attr
*tb
[__RPC_SG_MAX
];
670 struct blob_attr
*attr
;
674 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
677 return UBUS_STATUS_INVALID_ARGUMENT
;
679 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
681 return UBUS_STATUS_NOT_FOUND
;
683 blob_buf_init(&buf
, 0);
684 c
= blobmsg_open_table(&buf
, "values");
687 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
688 if (blobmsg_type(attr
) != BLOBMSG_TYPE_STRING
)
691 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
695 blobmsg_add_field(&buf
, blobmsg_type(data
->attr
),
696 blobmsg_name(data
->attr
),
697 blobmsg_data(data
->attr
),
698 blobmsg_data_len(data
->attr
));
701 rpc_session_dump_data(ses
, &buf
);
703 blobmsg_close_table(&buf
, c
);
704 ubus_send_reply(ctx
, req
, buf
.head
);
710 rpc_handle_unset(struct ubus_context
*ctx
, struct ubus_object
*obj
,
711 struct ubus_request_data
*req
, const char *method
,
712 struct blob_attr
*msg
)
714 struct rpc_session
*ses
;
715 struct rpc_session_data
*data
, *ndata
;
716 struct blob_attr
*tb
[__RPC_SA_MAX
];
717 struct blob_attr
*attr
;
720 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
723 return UBUS_STATUS_INVALID_ARGUMENT
;
725 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
727 return UBUS_STATUS_NOT_FOUND
;
729 if (!tb
[RPC_SG_KEYS
]) {
730 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
735 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
736 if (blobmsg_type(attr
) != BLOBMSG_TYPE_STRING
)
739 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
743 avl_delete(&ses
->data
, &data
->avl
);
751 rpc_handle_destroy(struct ubus_context
*ctx
, struct ubus_object
*obj
,
752 struct ubus_request_data
*req
, const char *method
,
753 struct blob_attr
*msg
)
755 struct rpc_session
*ses
;
756 struct blob_attr
*tb
;
758 blobmsg_parse(&sid_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
761 return UBUS_STATUS_INVALID_ARGUMENT
;
763 if (!strcmp(blobmsg_get_string(tb
), RPC_DEFAULT_SESSION_ID
))
764 return UBUS_STATUS_PERMISSION_DENIED
;
766 ses
= rpc_session_get(blobmsg_data(tb
));
768 return UBUS_STATUS_NOT_FOUND
;
770 rpc_session_destroy(ses
);
777 rpc_login_test_password(const char *hash
, const char *password
)
781 /* password is not set */
782 if (!hash
|| !*hash
|| !strcmp(hash
, "!") || !strcmp(hash
, "x"))
787 /* password hash refers to shadow/passwd */
788 else if (!strncmp(hash
, "$p$", 3))
791 struct spwd
*sp
= getspnam(hash
+ 3);
796 return rpc_login_test_password(sp
->sp_pwdp
, password
);
798 struct passwd
*pw
= getpwnam(hash
+ 3);
803 return rpc_login_test_password(pw
->pw_passwd
, password
);
807 crypt_hash
= crypt(password
, hash
);
809 return !strcmp(crypt_hash
, hash
);
812 static struct uci_section
*
813 rpc_login_test_login(struct uci_context
*uci
,
814 const char *username
, const char *password
)
816 struct uci_package
*p
= NULL
;
817 struct uci_section
*s
;
818 struct uci_element
*e
;
819 struct uci_ptr ptr
= { .package
= "rpcd" };
821 uci_load(uci
, ptr
.package
, &p
);
826 uci_foreach_element(&p
->sections
, e
)
828 s
= uci_to_section(e
);
830 if (strcmp(s
->type
, "login"))
833 ptr
.section
= s
->e
.name
;
836 /* test for matching username */
837 ptr
.option
= "username";
840 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
843 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
846 if (strcmp(ptr
.o
->v
.string
, username
))
849 /* If password is NULL, we're restoring ACLs for an existing session,
850 * in this case do not check the password again. */
854 /* test for matching password */
855 ptr
.option
= "password";
858 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
861 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
864 if (rpc_login_test_password(ptr
.o
->v
.string
, password
))
872 rpc_login_test_permission(struct uci_section
*s
,
873 const char *perm
, const char *group
)
876 struct uci_option
*o
;
877 struct uci_element
*e
, *l
;
879 /* If the login section is not provided, we're setting up acls for the
880 * default session, in this case uncondionally allow access to the
881 * "unauthenticated" access group */
883 return !strcmp(group
, "unauthenticated");
886 uci_foreach_element(&s
->options
, e
)
888 o
= uci_to_option(e
);
890 if (o
->type
!= UCI_TYPE_LIST
)
893 if (strcmp(o
->e
.name
, perm
))
896 /* Match negative expressions first. If a negative expression matches
897 * the current group name then deny access. */
898 uci_foreach_element(&o
->v
.list
, l
) {
904 while (isspace(*++p
));
909 if (!fnmatch(p
, group
, 0))
913 uci_foreach_element(&o
->v
.list
, l
) {
914 if (!l
->name
|| !*l
->name
|| *l
->name
== '!')
917 if (!fnmatch(l
->name
, group
, 0))
922 /* make sure that write permission implies read permission */
923 if (!strcmp(perm
, "read"))
924 return rpc_login_test_permission(s
, "write", group
);
930 rpc_login_setup_acl_scope(struct rpc_session
*ses
,
931 struct blob_attr
*acl_perm
,
932 struct blob_attr
*acl_scope
)
934 struct blob_attr
*acl_obj
, *acl_func
;
938 * Parse ACL scopes in table notation.
948 if (blobmsg_type(acl_scope
) == BLOBMSG_TYPE_TABLE
) {
949 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
950 if (blobmsg_type(acl_obj
) != BLOBMSG_TYPE_ARRAY
)
953 blobmsg_for_each_attr(acl_func
, acl_obj
, rem2
) {
954 if (blobmsg_type(acl_func
) != BLOBMSG_TYPE_STRING
)
957 rpc_session_grant(ses
, blobmsg_name(acl_scope
),
958 blobmsg_name(acl_obj
),
959 blobmsg_data(acl_func
));
965 * Parse ACL scopes in array notation. The permission ("read" or "write")
966 * will be used as function name for each object.
974 else if (blobmsg_type(acl_scope
) == BLOBMSG_TYPE_ARRAY
) {
975 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
976 if (blobmsg_type(acl_obj
) != BLOBMSG_TYPE_STRING
)
979 rpc_session_grant(ses
, blobmsg_name(acl_scope
),
980 blobmsg_data(acl_obj
),
981 blobmsg_name(acl_perm
));
987 rpc_login_setup_acl_file(struct rpc_session
*ses
, struct uci_section
*login
,
990 struct blob_buf acl
= { 0 };
991 struct blob_attr
*acl_group
, *acl_perm
, *acl_scope
;
994 blob_buf_init(&acl
, 0);
996 if (!blobmsg_add_json_from_file(&acl
, path
)) {
997 fprintf(stderr
, "Failed to parse %s\n", path
);
1001 /* Iterate access groups in toplevel object */
1002 blob_for_each_attr(acl_group
, acl
.head
, rem
) {
1003 /* Iterate permission objects in each access group object */
1004 blobmsg_for_each_attr(acl_perm
, acl_group
, rem2
) {
1005 if (blobmsg_type(acl_perm
) != BLOBMSG_TYPE_TABLE
)
1008 /* Only "read" and "write" permissions are defined */
1009 if (strcmp(blobmsg_name(acl_perm
), "read") &&
1010 strcmp(blobmsg_name(acl_perm
), "write"))
1014 * Check if the current user context specifies the current
1015 * "read" or "write" permission in the given access group.
1017 if (!rpc_login_test_permission(login
, blobmsg_name(acl_perm
),
1018 blobmsg_name(acl_group
)))
1021 /* Iterate scope objects within the permission object */
1022 blobmsg_for_each_attr(acl_scope
, acl_perm
, rem3
) {
1023 /* Setup the scopes of the access group */
1024 rpc_login_setup_acl_scope(ses
, acl_perm
, acl_scope
);
1027 * Add the access group itself as object to the "access-group"
1028 * meta scope and the the permission level ("read" or "write")
1042 * This allows session clients to easily query the allowed
1043 * access groups without having to test access of each single
1044 * <scope>/<object>/<function> tuple defined in a group.
1046 rpc_session_grant(ses
, "access-group",
1047 blobmsg_name(acl_group
),
1048 blobmsg_name(acl_perm
));
1054 blob_buf_free(&acl
);
1058 rpc_login_setup_acls(struct rpc_session
*ses
, struct uci_section
*login
)
1063 if (glob(RPC_SESSION_ACL_DIR
"/*.json", 0, NULL
, &gl
))
1066 for (i
= 0; i
< gl
.gl_pathc
; i
++)
1067 rpc_login_setup_acl_file(ses
, login
, gl
.gl_pathv
[i
]);
1073 rpc_handle_login(struct ubus_context
*ctx
, struct ubus_object
*obj
,
1074 struct ubus_request_data
*req
, const char *method
,
1075 struct blob_attr
*msg
)
1077 struct uci_context
*uci
= NULL
;
1078 struct uci_section
*login
;
1079 struct rpc_session
*ses
;
1080 struct blob_attr
*tb
[__RPC_L_MAX
];
1081 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
1084 blobmsg_parse(login_policy
, __RPC_L_MAX
, tb
, blob_data(msg
), blob_len(msg
));
1086 if (!tb
[RPC_L_USERNAME
] || !tb
[RPC_L_PASSWORD
]) {
1087 rv
= UBUS_STATUS_INVALID_ARGUMENT
;
1091 uci
= uci_alloc_context();
1094 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1098 login
= rpc_login_test_login(uci
, blobmsg_get_string(tb
[RPC_L_USERNAME
]),
1099 blobmsg_get_string(tb
[RPC_L_PASSWORD
]));
1102 rv
= UBUS_STATUS_PERMISSION_DENIED
;
1106 if (tb
[RPC_L_TIMEOUT
])
1107 timeout
= blobmsg_get_u32(tb
[RPC_L_TIMEOUT
]);
1109 ses
= rpc_session_create(timeout
);
1112 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1116 rpc_login_setup_acls(ses
, login
);
1118 rpc_session_set(ses
, "user", tb
[RPC_L_USERNAME
]);
1119 rpc_session_dump(ses
, ctx
, req
);
1123 uci_free_context(uci
);
1130 rpc_validate_sid(const char *id
)
1135 if (strlen(id
) != RPC_SID_LEN
)
1139 if (!isxdigit(*id
++))
1146 rpc_blob_to_file(const char *path
, struct blob_attr
*attr
)
1150 fd
= open(path
, O_WRONLY
| O_CREAT
| O_EXCL
, 0600);
1155 len
= write(fd
, attr
, blob_pad_len(attr
));
1159 if (len
!= blob_pad_len(attr
))
1168 static struct blob_attr
*
1169 rpc_blob_from_file(const char *path
)
1173 struct blob_attr head
, *attr
= NULL
;
1175 if (stat(path
, &s
) || !S_ISREG(s
.st_mode
))
1178 fd
= open(path
, O_RDONLY
);
1183 len
= read(fd
, &head
, sizeof(head
));
1185 if (len
!= sizeof(head
) || blob_pad_len(&head
) != s
.st_size
)
1188 attr
= calloc(1, s
.st_size
);
1193 memcpy(attr
, &head
, sizeof(head
));
1195 len
+= read(fd
, (char *)attr
+ sizeof(head
), s
.st_size
- sizeof(head
));
1197 if (len
!= blob_pad_len(&head
))
1215 rpc_session_from_blob(struct uci_context
*uci
, struct blob_attr
*attr
)
1218 const char *user
= NULL
;
1219 struct rpc_session
*ses
;
1220 struct uci_section
*login
;
1221 struct blob_attr
*tb
[__RPC_DUMP_MAX
], *data
;
1223 blobmsg_parse(dump_policy
, __RPC_DUMP_MAX
, tb
,
1224 blob_data(attr
), blob_len(attr
));
1226 for (i
= 0; i
< __RPC_DUMP_MAX
; i
++)
1230 ses
= rpc_session_new();
1235 memcpy(ses
->id
, blobmsg_data(tb
[RPC_DUMP_SID
]), RPC_SID_LEN
);
1237 ses
->timeout
= blobmsg_get_u32(tb
[RPC_DUMP_TIMEOUT
]);
1239 blobmsg_for_each_attr(data
, tb
[RPC_DUMP_DATA
], rem
) {
1240 rpc_session_set(ses
, blobmsg_name(data
), data
);
1242 if (!strcmp(blobmsg_name(data
), "username"))
1243 user
= blobmsg_get_string(data
);
1247 login
= rpc_login_test_login(uci
, user
, NULL
);
1249 rpc_login_setup_acls(ses
, login
);
1252 avl_insert(&sessions
, &ses
->avl
);
1254 uloop_timeout_set(&ses
->t
, blobmsg_get_u32(tb
[RPC_DUMP_EXPIRES
]) * 1000);
1259 int rpc_session_api_init(struct ubus_context
*ctx
)
1261 struct rpc_session
*ses
;
1263 static const struct ubus_method session_methods
[] = {
1264 UBUS_METHOD("create", rpc_handle_create
, &new_policy
),
1265 UBUS_METHOD("list", rpc_handle_list
, &sid_policy
),
1266 UBUS_METHOD("grant", rpc_handle_acl
, acl_policy
),
1267 UBUS_METHOD("revoke", rpc_handle_acl
, acl_policy
),
1268 UBUS_METHOD("access", rpc_handle_access
, perm_policy
),
1269 UBUS_METHOD("set", rpc_handle_set
, set_policy
),
1270 UBUS_METHOD("get", rpc_handle_get
, get_policy
),
1271 UBUS_METHOD("unset", rpc_handle_unset
, get_policy
),
1272 UBUS_METHOD("destroy", rpc_handle_destroy
, &sid_policy
),
1273 UBUS_METHOD("login", rpc_handle_login
, login_policy
),
1276 static struct ubus_object_type session_type
=
1277 UBUS_OBJECT_TYPE("luci-rpc-session", session_methods
);
1279 static struct ubus_object obj
= {
1281 .type
= &session_type
,
1282 .methods
= session_methods
,
1283 .n_methods
= ARRAY_SIZE(session_methods
),
1286 avl_init(&sessions
, avl_strcmp
, false, NULL
);
1288 /* setup the default session */
1289 ses
= rpc_session_new();
1292 strcpy(ses
->id
, RPC_DEFAULT_SESSION_ID
);
1293 rpc_login_setup_acls(ses
, NULL
);
1294 avl_insert(&sessions
, &ses
->avl
);
1297 return ubus_add_object(ctx
, &obj
);
1300 bool rpc_session_access(const char *sid
, const char *scope
,
1301 const char *object
, const char *function
)
1303 struct rpc_session
*ses
= rpc_session_get(sid
);
1308 return rpc_session_acl_allowed(ses
, scope
, object
, function
);
1311 void rpc_session_create_cb(struct rpc_session_cb
*cb
)
1314 list_add(&cb
->list
, &create_callbacks
);
1317 void rpc_session_destroy_cb(struct rpc_session_cb
*cb
)
1320 list_add(&cb
->list
, &destroy_callbacks
);
1323 void rpc_session_freeze(void)
1326 struct rpc_session
*ses
;
1327 char path
[PATH_MAX
];
1329 if (stat(RPC_SESSION_DIRECTORY
, &s
))
1330 mkdir(RPC_SESSION_DIRECTORY
, 0700);
1332 avl_for_each_element(&sessions
, ses
, avl
) {
1333 /* skip default session */
1334 if (!strcmp(ses
->id
, RPC_DEFAULT_SESSION_ID
))
1337 snprintf(path
, sizeof(path
) - 1, RPC_SESSION_DIRECTORY
"/%s", ses
->id
);
1338 rpc_session_to_blob(ses
, false);
1339 rpc_blob_to_file(path
, buf
.head
);
1343 void rpc_session_thaw(void)
1346 char path
[PATH_MAX
];
1348 struct blob_attr
*attr
;
1349 struct uci_context
*uci
;
1351 d
= opendir(RPC_SESSION_DIRECTORY
);
1356 uci
= uci_alloc_context();
1361 while ((e
= readdir(d
)) != NULL
) {
1362 if (!rpc_validate_sid(e
->d_name
))
1365 snprintf(path
, sizeof(path
) - 1,
1366 RPC_SESSION_DIRECTORY
"/%s", e
->d_name
);
1368 attr
= rpc_blob_from_file(path
);
1371 rpc_session_from_blob(uci
, attr
);
1380 uci_free_context(uci
);