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 };
157 f
= fopen("/dev/urandom", "r");
161 ret
= fread(buf
, 1, sizeof(buf
), f
);
167 for (i
= 0; i
< sizeof(buf
); i
++)
168 sprintf(dest
+ (i
<<1), "%02x", buf
[i
]);
174 rpc_session_dump_data(struct rpc_session
*ses
, struct blob_buf
*b
)
176 struct rpc_session_data
*d
;
178 avl_for_each_element(&ses
->data
, d
, avl
) {
179 blobmsg_add_field(b
, blobmsg_type(d
->attr
), blobmsg_name(d
->attr
),
180 blobmsg_data(d
->attr
), blobmsg_data_len(d
->attr
));
185 rpc_session_dump_acls(struct rpc_session
*ses
, struct blob_buf
*b
)
187 struct rpc_session_acl
*acl
;
188 struct rpc_session_acl_scope
*acl_scope
;
189 const char *lastobj
= NULL
;
190 const char *lastscope
= NULL
;
191 void *c
= NULL
, *d
= NULL
;
193 avl_for_each_element(&ses
->acls
, acl_scope
, avl
) {
194 if (!lastscope
|| strcmp(acl_scope
->avl
.key
, lastscope
))
196 if (c
) blobmsg_close_table(b
, c
);
197 c
= blobmsg_open_table(b
, acl_scope
->avl
.key
);
203 avl_for_each_element(&acl_scope
->acls
, acl
, avl
) {
204 if (!lastobj
|| strcmp(acl
->object
, lastobj
))
206 if (d
) blobmsg_close_array(b
, d
);
207 d
= blobmsg_open_array(b
, acl
->object
);
210 blobmsg_add_string(b
, NULL
, acl
->function
);
211 lastobj
= acl
->object
;
214 if (d
) blobmsg_close_array(b
, d
);
217 if (c
) blobmsg_close_table(b
, c
);
221 rpc_session_to_blob(struct rpc_session
*ses
, bool acls
)
225 blob_buf_init(&buf
, 0);
227 blobmsg_add_string(&buf
, "ubus_rpc_session", ses
->id
);
228 blobmsg_add_u32(&buf
, "timeout", ses
->timeout
);
229 blobmsg_add_u32(&buf
, "expires", uloop_timeout_remaining(&ses
->t
) / 1000);
232 c
= blobmsg_open_table(&buf
, "acls");
233 rpc_session_dump_acls(ses
, &buf
);
234 blobmsg_close_table(&buf
, c
);
237 c
= blobmsg_open_table(&buf
, "data");
238 rpc_session_dump_data(ses
, &buf
);
239 blobmsg_close_table(&buf
, c
);
243 rpc_session_dump(struct rpc_session
*ses
, struct ubus_context
*ctx
,
244 struct ubus_request_data
*req
)
246 rpc_session_to_blob(ses
, true);
248 ubus_send_reply(ctx
, req
, buf
.head
);
252 rpc_touch_session(struct rpc_session
*ses
)
254 if (ses
->timeout
> 0)
255 uloop_timeout_set(&ses
->t
, ses
->timeout
* 1000);
259 rpc_session_destroy(struct rpc_session
*ses
)
261 struct rpc_session_acl
*acl
, *nacl
;
262 struct rpc_session_acl_scope
*acl_scope
, *nacl_scope
;
263 struct rpc_session_data
*data
, *ndata
;
264 struct rpc_session_cb
*cb
;
266 list_for_each_entry(cb
, &destroy_callbacks
, list
)
267 cb
->cb(ses
, cb
->priv
);
269 uloop_timeout_cancel(&ses
->t
);
271 avl_for_each_element_safe(&ses
->acls
, acl_scope
, avl
, nacl_scope
) {
272 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, nacl
)
275 avl_delete(&ses
->acls
, &acl_scope
->avl
);
279 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
282 avl_delete(&sessions
, &ses
->avl
);
286 static void rpc_session_timeout(struct uloop_timeout
*t
)
288 struct rpc_session
*ses
;
290 ses
= container_of(t
, struct rpc_session
, t
);
291 rpc_session_destroy(ses
);
294 static struct rpc_session
*
295 rpc_session_new(void)
297 struct rpc_session
*ses
;
299 ses
= calloc(1, sizeof(*ses
));
304 ses
->avl
.key
= ses
->id
;
306 avl_init(&ses
->acls
, avl_strcmp
, true, NULL
);
307 avl_init(&ses
->data
, avl_strcmp
, false, NULL
);
309 ses
->t
.cb
= rpc_session_timeout
;
314 static struct rpc_session
*
315 rpc_session_create(int timeout
)
317 struct rpc_session
*ses
;
318 struct rpc_session_cb
*cb
;
320 ses
= rpc_session_new();
325 if (rpc_random(ses
->id
))
328 ses
->timeout
= timeout
;
330 avl_insert(&sessions
, &ses
->avl
);
332 rpc_touch_session(ses
);
334 list_for_each_entry(cb
, &create_callbacks
, list
)
335 cb
->cb(ses
, cb
->priv
);
340 static struct rpc_session
*
341 rpc_session_get(const char *id
)
343 struct rpc_session
*ses
;
345 ses
= avl_find_element(&sessions
, id
, ses
, avl
);
349 rpc_touch_session(ses
);
354 rpc_handle_create(struct ubus_context
*ctx
, struct ubus_object
*obj
,
355 struct ubus_request_data
*req
, const char *method
,
356 struct blob_attr
*msg
)
358 struct rpc_session
*ses
;
359 struct blob_attr
*tb
;
360 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
362 blobmsg_parse(new_policy
, __RPC_SN_MAX
, &tb
, blob_data(msg
), blob_len(msg
));
364 timeout
= blobmsg_get_u32(tb
);
366 ses
= rpc_session_create(timeout
);
368 rpc_session_dump(ses
, ctx
, req
);
374 rpc_handle_list(struct ubus_context
*ctx
, struct ubus_object
*obj
,
375 struct ubus_request_data
*req
, const char *method
,
376 struct blob_attr
*msg
)
378 struct rpc_session
*ses
;
379 struct blob_attr
*tb
;
381 blobmsg_parse(sid_policy
, __RPC_SI_MAX
, &tb
, blob_data(msg
), blob_len(msg
));
384 avl_for_each_element(&sessions
, ses
, avl
)
385 rpc_session_dump(ses
, ctx
, req
);
389 ses
= rpc_session_get(blobmsg_data(tb
));
391 return UBUS_STATUS_NOT_FOUND
;
393 rpc_session_dump(ses
, ctx
, req
);
399 uh_id_len(const char *str
)
401 return strcspn(str
, "*?[");
405 rpc_session_grant(struct rpc_session
*ses
,
406 const char *scope
, const char *object
, const char *function
)
408 struct rpc_session_acl
*acl
;
409 struct rpc_session_acl_scope
*acl_scope
;
410 char *new_scope
, *new_obj
, *new_func
, *new_id
;
413 if (!object
|| !function
)
414 return UBUS_STATUS_INVALID_ARGUMENT
;
416 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
419 uh_foreach_matching_acl_prefix(acl
, &acl_scope
->acls
, object
, function
) {
420 if (!strcmp(acl
->object
, object
) &&
421 !strcmp(acl
->function
, function
))
427 acl_scope
= calloc_a(sizeof(*acl_scope
),
428 &new_scope
, strlen(scope
) + 1);
431 return UBUS_STATUS_UNKNOWN_ERROR
;
433 acl_scope
->avl
.key
= strcpy(new_scope
, scope
);
434 avl_init(&acl_scope
->acls
, avl_strcmp
, true, NULL
);
435 avl_insert(&ses
->acls
, &acl_scope
->avl
);
438 id_len
= uh_id_len(object
);
439 acl
= calloc_a(sizeof(*acl
),
440 &new_obj
, strlen(object
) + 1,
441 &new_func
, strlen(function
) + 1,
442 &new_id
, id_len
+ 1);
445 return UBUS_STATUS_UNKNOWN_ERROR
;
447 acl
->object
= strcpy(new_obj
, object
);
448 acl
->function
= strcpy(new_func
, function
);
449 acl
->avl
.key
= strncpy(new_id
, object
, id_len
);
450 avl_insert(&acl_scope
->acls
, &acl
->avl
);
456 rpc_session_revoke(struct rpc_session
*ses
,
457 const char *scope
, const char *object
, const char *function
)
459 struct rpc_session_acl
*acl
, *next
;
460 struct rpc_session_acl_scope
*acl_scope
;
464 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
469 if (!object
&& !function
) {
470 avl_remove_all_elements(&acl_scope
->acls
, acl
, avl
, next
)
472 avl_delete(&ses
->acls
, &acl_scope
->avl
);
477 id_len
= uh_id_len(object
);
478 id
= alloca(id_len
+ 1);
479 strncpy(id
, object
, id_len
);
482 acl
= avl_find_element(&acl_scope
->acls
, id
, acl
, avl
);
484 if (!avl_is_last(&acl_scope
->acls
, &acl
->avl
))
485 next
= avl_next_element(acl
, avl
);
489 if (strcmp(id
, acl
->avl
.key
) != 0)
492 if (!strcmp(acl
->object
, object
) &&
493 !strcmp(acl
->function
, function
)) {
494 avl_delete(&acl_scope
->acls
, &acl
->avl
);
500 if (avl_is_empty(&acl_scope
->acls
)) {
501 avl_delete(&ses
->acls
, &acl_scope
->avl
);
510 rpc_handle_acl(struct ubus_context
*ctx
, struct ubus_object
*obj
,
511 struct ubus_request_data
*req
, const char *method
,
512 struct blob_attr
*msg
)
514 struct rpc_session
*ses
;
515 struct blob_attr
*tb
[__RPC_SA_MAX
];
516 struct blob_attr
*attr
, *sattr
;
517 const char *object
, *function
;
518 const char *scope
= "ubus";
521 int (*cb
)(struct rpc_session
*ses
,
522 const char *scope
, const char *object
, const char *function
);
524 blobmsg_parse(acl_policy
, __RPC_SA_MAX
, tb
, blob_data(msg
), blob_len(msg
));
527 return UBUS_STATUS_INVALID_ARGUMENT
;
529 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SA_SID
]));
531 return UBUS_STATUS_NOT_FOUND
;
533 if (tb
[RPC_SA_SCOPE
])
534 scope
= blobmsg_data(tb
[RPC_SA_SCOPE
]);
536 if (!strcmp(method
, "grant"))
537 cb
= rpc_session_grant
;
539 cb
= rpc_session_revoke
;
541 if (!tb
[RPC_SA_OBJECTS
])
542 return cb(ses
, scope
, NULL
, NULL
);
544 blobmsg_for_each_attr(attr
, tb
[RPC_SA_OBJECTS
], rem1
) {
545 if (blobmsg_type(attr
) != BLOBMSG_TYPE_ARRAY
)
551 blobmsg_for_each_attr(sattr
, attr
, rem2
) {
552 if (blobmsg_type(sattr
) != BLOBMSG_TYPE_STRING
)
556 object
= blobmsg_data(sattr
);
558 function
= blobmsg_data(sattr
);
563 if (object
&& function
)
564 cb(ses
, scope
, object
, function
);
571 rpc_session_acl_allowed(struct rpc_session
*ses
, const char *scope
,
572 const char *obj
, const char *fun
)
574 struct rpc_session_acl
*acl
;
575 struct rpc_session_acl_scope
*acl_scope
;
577 acl_scope
= avl_find_element(&ses
->acls
, scope
, acl_scope
, avl
);
580 uh_foreach_matching_acl(acl
, &acl_scope
->acls
, obj
, fun
)
588 rpc_handle_access(struct ubus_context
*ctx
, struct ubus_object
*obj
,
589 struct ubus_request_data
*req
, const char *method
,
590 struct blob_attr
*msg
)
592 struct rpc_session
*ses
;
593 struct blob_attr
*tb
[__RPC_SP_MAX
];
594 const char *scope
= "ubus";
597 blobmsg_parse(perm_policy
, __RPC_SP_MAX
, tb
, blob_data(msg
), blob_len(msg
));
600 return UBUS_STATUS_INVALID_ARGUMENT
;
602 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SP_SID
]));
604 return UBUS_STATUS_NOT_FOUND
;
606 blob_buf_init(&buf
, 0);
608 if (tb
[RPC_SP_OBJECT
] && tb
[RPC_SP_FUNCTION
])
610 if (tb
[RPC_SP_SCOPE
])
611 scope
= blobmsg_data(tb
[RPC_SP_SCOPE
]);
613 allow
= rpc_session_acl_allowed(ses
, scope
,
614 blobmsg_data(tb
[RPC_SP_OBJECT
]),
615 blobmsg_data(tb
[RPC_SP_FUNCTION
]));
617 blobmsg_add_u8(&buf
, "access", allow
);
621 rpc_session_dump_acls(ses
, &buf
);
624 ubus_send_reply(ctx
, req
, buf
.head
);
630 rpc_session_set(struct rpc_session
*ses
, struct blob_attr
*val
)
632 struct rpc_session_data
*data
;
634 data
= avl_find_element(&ses
->data
, blobmsg_name(val
), data
, avl
);
636 avl_delete(&ses
->data
, &data
->avl
);
640 data
= calloc(1, sizeof(*data
) + blob_pad_len(val
));
644 memcpy(data
->attr
, val
, blob_pad_len(val
));
645 data
->avl
.key
= blobmsg_name(data
->attr
);
646 avl_insert(&ses
->data
, &data
->avl
);
650 rpc_handle_set(struct ubus_context
*ctx
, struct ubus_object
*obj
,
651 struct ubus_request_data
*req
, const char *method
,
652 struct blob_attr
*msg
)
654 struct rpc_session
*ses
;
655 struct blob_attr
*tb
[__RPC_SS_MAX
];
656 struct blob_attr
*attr
;
659 blobmsg_parse(set_policy
, __RPC_SS_MAX
, tb
, blob_data(msg
), blob_len(msg
));
661 if (!tb
[RPC_SS_SID
] || !tb
[RPC_SS_VALUES
])
662 return UBUS_STATUS_INVALID_ARGUMENT
;
664 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SS_SID
]));
666 return UBUS_STATUS_NOT_FOUND
;
668 blobmsg_for_each_attr(attr
, tb
[RPC_SS_VALUES
], rem
) {
669 if (!blobmsg_name(attr
)[0])
672 rpc_session_set(ses
, attr
);
679 rpc_handle_get(struct ubus_context
*ctx
, struct ubus_object
*obj
,
680 struct ubus_request_data
*req
, const char *method
,
681 struct blob_attr
*msg
)
683 struct rpc_session
*ses
;
684 struct rpc_session_data
*data
;
685 struct blob_attr
*tb
[__RPC_SG_MAX
];
686 struct blob_attr
*attr
;
690 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
693 return UBUS_STATUS_INVALID_ARGUMENT
;
695 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
697 return UBUS_STATUS_NOT_FOUND
;
699 blob_buf_init(&buf
, 0);
700 c
= blobmsg_open_table(&buf
, "values");
703 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
704 if (blobmsg_type(attr
) != BLOBMSG_TYPE_STRING
)
707 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
711 blobmsg_add_field(&buf
, blobmsg_type(data
->attr
),
712 blobmsg_name(data
->attr
),
713 blobmsg_data(data
->attr
),
714 blobmsg_data_len(data
->attr
));
717 rpc_session_dump_data(ses
, &buf
);
719 blobmsg_close_table(&buf
, c
);
720 ubus_send_reply(ctx
, req
, buf
.head
);
726 rpc_handle_unset(struct ubus_context
*ctx
, struct ubus_object
*obj
,
727 struct ubus_request_data
*req
, const char *method
,
728 struct blob_attr
*msg
)
730 struct rpc_session
*ses
;
731 struct rpc_session_data
*data
, *ndata
;
732 struct blob_attr
*tb
[__RPC_SA_MAX
];
733 struct blob_attr
*attr
;
736 blobmsg_parse(get_policy
, __RPC_SG_MAX
, tb
, blob_data(msg
), blob_len(msg
));
739 return UBUS_STATUS_INVALID_ARGUMENT
;
741 ses
= rpc_session_get(blobmsg_data(tb
[RPC_SG_SID
]));
743 return UBUS_STATUS_NOT_FOUND
;
745 if (!tb
[RPC_SG_KEYS
]) {
746 avl_remove_all_elements(&ses
->data
, data
, avl
, ndata
)
751 blobmsg_for_each_attr(attr
, tb
[RPC_SG_KEYS
], rem
) {
752 if (blobmsg_type(attr
) != BLOBMSG_TYPE_STRING
)
755 data
= avl_find_element(&ses
->data
, blobmsg_data(attr
), data
, avl
);
759 avl_delete(&ses
->data
, &data
->avl
);
767 rpc_handle_destroy(struct ubus_context
*ctx
, struct ubus_object
*obj
,
768 struct ubus_request_data
*req
, const char *method
,
769 struct blob_attr
*msg
)
771 struct rpc_session
*ses
;
772 struct blob_attr
*tb
;
774 blobmsg_parse(sid_policy
, __RPC_SI_MAX
, &tb
, blob_data(msg
), blob_len(msg
));
777 return UBUS_STATUS_INVALID_ARGUMENT
;
779 if (!strcmp(blobmsg_get_string(tb
), RPC_DEFAULT_SESSION_ID
))
780 return UBUS_STATUS_PERMISSION_DENIED
;
782 ses
= rpc_session_get(blobmsg_data(tb
));
784 return UBUS_STATUS_NOT_FOUND
;
786 rpc_session_destroy(ses
);
793 rpc_login_test_password(const char *hash
, const char *password
)
797 /* password is not set */
798 if (!hash
|| !*hash
|| !strcmp(hash
, "!") || !strcmp(hash
, "x"))
803 /* password hash refers to shadow/passwd */
804 else if (!strncmp(hash
, "$p$", 3))
807 struct spwd
*sp
= getspnam(hash
+ 3);
812 return rpc_login_test_password(sp
->sp_pwdp
, password
);
814 struct passwd
*pw
= getpwnam(hash
+ 3);
819 return rpc_login_test_password(pw
->pw_passwd
, password
);
823 crypt_hash
= crypt(password
, hash
);
825 return !strcmp(crypt_hash
, hash
);
828 static struct uci_section
*
829 rpc_login_test_login(struct uci_context
*uci
,
830 const char *username
, const char *password
)
832 struct uci_package
*p
= NULL
;
833 struct uci_section
*s
;
834 struct uci_element
*e
;
835 struct uci_ptr ptr
= { .package
= "rpcd" };
837 uci_load(uci
, ptr
.package
, &p
);
842 uci_foreach_element(&p
->sections
, e
)
844 s
= uci_to_section(e
);
846 if (strcmp(s
->type
, "login"))
849 ptr
.section
= s
->e
.name
;
852 /* test for matching username */
853 ptr
.option
= "username";
856 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
859 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
862 if (strcmp(ptr
.o
->v
.string
, username
))
865 /* If password is NULL, we're restoring ACLs for an existing session,
866 * in this case do not check the password again. */
870 /* test for matching password */
871 ptr
.option
= "password";
874 if (uci_lookup_ptr(uci
, &ptr
, NULL
, true))
877 if (ptr
.o
->type
!= UCI_TYPE_STRING
)
880 if (rpc_login_test_password(ptr
.o
->v
.string
, password
))
888 rpc_login_test_permission(struct uci_section
*s
,
889 const char *perm
, const char *group
)
892 struct uci_option
*o
;
893 struct uci_element
*e
, *l
;
895 /* If the login section is not provided, we're setting up acls for the
896 * default session, in this case uncondionally allow access to the
897 * "unauthenticated" access group */
899 return !strcmp(group
, "unauthenticated");
902 uci_foreach_element(&s
->options
, e
)
904 o
= uci_to_option(e
);
906 if (o
->type
!= UCI_TYPE_LIST
)
909 if (strcmp(o
->e
.name
, perm
))
912 /* Match negative expressions first. If a negative expression matches
913 * the current group name then deny access. */
914 uci_foreach_element(&o
->v
.list
, l
) {
920 while (isspace(*++p
));
925 if (!fnmatch(p
, group
, 0))
929 uci_foreach_element(&o
->v
.list
, l
) {
930 if (!l
->name
|| !*l
->name
|| *l
->name
== '!')
933 if (!fnmatch(l
->name
, group
, 0))
938 /* make sure that write permission implies read permission */
939 if (!strcmp(perm
, "read"))
940 return rpc_login_test_permission(s
, "write", group
);
946 rpc_login_setup_acl_scope(struct rpc_session
*ses
,
947 struct blob_attr
*acl_perm
,
948 struct blob_attr
*acl_scope
)
950 struct blob_attr
*acl_obj
, *acl_func
;
954 * Parse ACL scopes in table notation.
964 if (blobmsg_type(acl_scope
) == BLOBMSG_TYPE_TABLE
) {
965 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
966 if (blobmsg_type(acl_obj
) != BLOBMSG_TYPE_ARRAY
)
969 blobmsg_for_each_attr(acl_func
, acl_obj
, rem2
) {
970 if (blobmsg_type(acl_func
) != BLOBMSG_TYPE_STRING
)
973 rpc_session_grant(ses
, blobmsg_name(acl_scope
),
974 blobmsg_name(acl_obj
),
975 blobmsg_data(acl_func
));
981 * Parse ACL scopes in array notation. The permission ("read" or "write")
982 * will be used as function name for each object.
990 else if (blobmsg_type(acl_scope
) == BLOBMSG_TYPE_ARRAY
) {
991 blobmsg_for_each_attr(acl_obj
, acl_scope
, rem
) {
992 if (blobmsg_type(acl_obj
) != BLOBMSG_TYPE_STRING
)
995 rpc_session_grant(ses
, blobmsg_name(acl_scope
),
996 blobmsg_data(acl_obj
),
997 blobmsg_name(acl_perm
));
1003 rpc_login_setup_acl_file(struct rpc_session
*ses
, struct uci_section
*login
,
1006 struct blob_buf acl
= { 0 };
1007 struct blob_attr
*acl_group
, *acl_perm
, *acl_scope
;
1008 int rem
, rem2
, rem3
;
1010 blob_buf_init(&acl
, 0);
1012 if (!blobmsg_add_json_from_file(&acl
, path
)) {
1013 fprintf(stderr
, "Failed to parse %s\n", path
);
1017 /* Iterate access groups in toplevel object */
1018 blob_for_each_attr(acl_group
, acl
.head
, rem
) {
1019 /* Iterate permission objects in each access group object */
1020 blobmsg_for_each_attr(acl_perm
, acl_group
, rem2
) {
1021 if (blobmsg_type(acl_perm
) != BLOBMSG_TYPE_TABLE
)
1024 /* Only "read" and "write" permissions are defined */
1025 if (strcmp(blobmsg_name(acl_perm
), "read") &&
1026 strcmp(blobmsg_name(acl_perm
), "write"))
1030 * Check if the current user context specifies the current
1031 * "read" or "write" permission in the given access group.
1033 if (!rpc_login_test_permission(login
, blobmsg_name(acl_perm
),
1034 blobmsg_name(acl_group
)))
1037 /* Iterate scope objects within the permission object */
1038 blobmsg_for_each_attr(acl_scope
, acl_perm
, rem3
) {
1039 /* Setup the scopes of the access group */
1040 rpc_login_setup_acl_scope(ses
, acl_perm
, acl_scope
);
1043 * Add the access group itself as object to the "access-group"
1044 * meta scope and the the permission level ("read" or "write")
1058 * This allows session clients to easily query the allowed
1059 * access groups without having to test access of each single
1060 * <scope>/<object>/<function> tuple defined in a group.
1062 rpc_session_grant(ses
, "access-group",
1063 blobmsg_name(acl_group
),
1064 blobmsg_name(acl_perm
));
1070 blob_buf_free(&acl
);
1074 rpc_login_setup_acls(struct rpc_session
*ses
, struct uci_section
*login
)
1079 if (glob(RPC_SESSION_ACL_DIR
"/*.json", 0, NULL
, &gl
))
1082 for (i
= 0; i
< gl
.gl_pathc
; i
++)
1083 rpc_login_setup_acl_file(ses
, login
, gl
.gl_pathv
[i
]);
1088 static struct rpc_session
*
1089 rpc_reclaim_apply_session(const char *expected_username
)
1091 struct rpc_session_data
*username
;
1092 struct rpc_session
*ses
;
1097 ses
= rpc_session_get(apply_sid
);
1102 username
= avl_find_element(&ses
->data
, "username", username
, avl
);
1104 if (!username
|| blobmsg_type(username
->attr
) != BLOBMSG_TYPE_STRING
)
1107 if (strcmp(blobmsg_get_string(username
->attr
), expected_username
))
1114 rpc_handle_login(struct ubus_context
*ctx
, struct ubus_object
*obj
,
1115 struct ubus_request_data
*req
, const char *method
,
1116 struct blob_attr
*msg
)
1118 struct uci_context
*uci
= NULL
;
1119 struct uci_section
*login
;
1120 struct rpc_session
*ses
;
1121 struct blob_attr
*tb
[__RPC_L_MAX
];
1122 int timeout
= RPC_DEFAULT_SESSION_TIMEOUT
;
1125 blobmsg_parse(login_policy
, __RPC_L_MAX
, tb
, blob_data(msg
), blob_len(msg
));
1127 if (!tb
[RPC_L_USERNAME
] || !tb
[RPC_L_PASSWORD
]) {
1128 rv
= UBUS_STATUS_INVALID_ARGUMENT
;
1132 uci
= uci_alloc_context();
1135 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1139 login
= rpc_login_test_login(uci
, blobmsg_get_string(tb
[RPC_L_USERNAME
]),
1140 blobmsg_get_string(tb
[RPC_L_PASSWORD
]));
1143 rv
= UBUS_STATUS_PERMISSION_DENIED
;
1147 if (tb
[RPC_L_TIMEOUT
])
1148 timeout
= blobmsg_get_u32(tb
[RPC_L_TIMEOUT
]);
1151 * attempt to reclaim a pending apply session, but only accept it
1152 * if the username matches, otherwise perform a new login
1155 ses
= rpc_reclaim_apply_session(blobmsg_get_string(tb
[RPC_L_USERNAME
]));
1158 ses
= rpc_session_create(timeout
);
1161 rv
= UBUS_STATUS_UNKNOWN_ERROR
;
1165 rpc_login_setup_acls(ses
, login
);
1167 rpc_session_set(ses
, tb
[RPC_L_USERNAME
]);
1168 rpc_session_dump(ses
, ctx
, req
);
1172 uci_free_context(uci
);
1179 rpc_validate_sid(const char *id
)
1184 if (strlen(id
) != RPC_SID_LEN
)
1188 if (!isxdigit(*id
++))
1195 rpc_blob_to_file(const char *path
, struct blob_attr
*attr
)
1199 fd
= open(path
, O_WRONLY
| O_CREAT
| O_EXCL
, 0600);
1204 len
= write(fd
, attr
, blob_pad_len(attr
));
1208 if (len
!= blob_pad_len(attr
))
1217 static struct blob_attr
*
1218 rpc_blob_from_file(const char *path
)
1222 struct blob_attr head
, *attr
= NULL
;
1224 if (stat(path
, &s
) || !S_ISREG(s
.st_mode
))
1227 fd
= open(path
, O_RDONLY
);
1232 len
= read(fd
, &head
, sizeof(head
));
1234 if (len
!= sizeof(head
) || blob_pad_len(&head
) != s
.st_size
)
1237 attr
= calloc(1, s
.st_size
);
1242 memcpy(attr
, &head
, sizeof(head
));
1244 len
+= read(fd
, (char *)attr
+ sizeof(head
), s
.st_size
- sizeof(head
));
1246 if (len
!= blob_pad_len(&head
))
1264 rpc_session_from_blob(struct uci_context
*uci
, struct blob_attr
*attr
)
1267 const char *user
= NULL
;
1268 struct rpc_session
*ses
;
1269 struct uci_section
*login
;
1270 struct blob_attr
*tb
[__RPC_DUMP_MAX
], *data
;
1272 blobmsg_parse(dump_policy
, __RPC_DUMP_MAX
, tb
,
1273 blob_data(attr
), blob_len(attr
));
1275 for (i
= 0; i
< __RPC_DUMP_MAX
; i
++)
1279 ses
= rpc_session_new();
1284 memcpy(ses
->id
, blobmsg_data(tb
[RPC_DUMP_SID
]), RPC_SID_LEN
);
1286 ses
->timeout
= blobmsg_get_u32(tb
[RPC_DUMP_TIMEOUT
]);
1288 blobmsg_for_each_attr(data
, tb
[RPC_DUMP_DATA
], rem
) {
1289 rpc_session_set(ses
, data
);
1291 if (blobmsg_type(data
) != BLOBMSG_TYPE_STRING
)
1294 if (!strcmp(blobmsg_name(data
), "username"))
1295 user
= blobmsg_get_string(data
);
1299 login
= rpc_login_test_login(uci
, user
, NULL
);
1301 rpc_login_setup_acls(ses
, login
);
1304 avl_insert(&sessions
, &ses
->avl
);
1306 uloop_timeout_set(&ses
->t
, blobmsg_get_u32(tb
[RPC_DUMP_EXPIRES
]) * 1000);
1311 int rpc_session_api_init(struct ubus_context
*ctx
)
1313 struct rpc_session
*ses
;
1315 static const struct ubus_method session_methods
[] = {
1316 UBUS_METHOD("create", rpc_handle_create
, new_policy
),
1317 UBUS_METHOD("list", rpc_handle_list
, sid_policy
),
1318 UBUS_METHOD("grant", rpc_handle_acl
, acl_policy
),
1319 UBUS_METHOD("revoke", rpc_handle_acl
, acl_policy
),
1320 UBUS_METHOD("access", rpc_handle_access
, perm_policy
),
1321 UBUS_METHOD("set", rpc_handle_set
, set_policy
),
1322 UBUS_METHOD("get", rpc_handle_get
, get_policy
),
1323 UBUS_METHOD("unset", rpc_handle_unset
, get_policy
),
1324 UBUS_METHOD("destroy", rpc_handle_destroy
, sid_policy
),
1325 UBUS_METHOD("login", rpc_handle_login
, login_policy
),
1328 static struct ubus_object_type session_type
=
1329 UBUS_OBJECT_TYPE("luci-rpc-session", session_methods
);
1331 static struct ubus_object obj
= {
1333 .type
= &session_type
,
1334 .methods
= session_methods
,
1335 .n_methods
= ARRAY_SIZE(session_methods
),
1338 avl_init(&sessions
, avl_strcmp
, false, NULL
);
1340 /* setup the default session */
1341 ses
= rpc_session_new();
1344 strcpy(ses
->id
, RPC_DEFAULT_SESSION_ID
);
1345 rpc_login_setup_acls(ses
, NULL
);
1346 avl_insert(&sessions
, &ses
->avl
);
1349 return ubus_add_object(ctx
, &obj
);
1352 bool rpc_session_access(const char *sid
, const char *scope
,
1353 const char *object
, const char *function
)
1355 struct rpc_session
*ses
= rpc_session_get(sid
);
1360 return rpc_session_acl_allowed(ses
, scope
, object
, function
);
1363 void rpc_session_create_cb(struct rpc_session_cb
*cb
)
1366 list_add(&cb
->list
, &create_callbacks
);
1369 void rpc_session_destroy_cb(struct rpc_session_cb
*cb
)
1372 list_add(&cb
->list
, &destroy_callbacks
);
1375 void rpc_session_freeze(void)
1378 struct rpc_session
*ses
;
1379 char path
[PATH_MAX
];
1381 if (stat(RPC_SESSION_DIRECTORY
, &s
))
1382 mkdir(RPC_SESSION_DIRECTORY
, 0700);
1384 avl_for_each_element(&sessions
, ses
, avl
) {
1385 /* skip default session */
1386 if (!strcmp(ses
->id
, RPC_DEFAULT_SESSION_ID
))
1389 snprintf(path
, sizeof(path
) - 1, RPC_SESSION_DIRECTORY
"/%s", ses
->id
);
1390 rpc_session_to_blob(ses
, false);
1391 rpc_blob_to_file(path
, buf
.head
);
1395 void rpc_session_thaw(void)
1398 char path
[PATH_MAX
];
1400 struct blob_attr
*attr
;
1401 struct uci_context
*uci
;
1403 d
= opendir(RPC_SESSION_DIRECTORY
);
1408 uci
= uci_alloc_context();
1413 while ((e
= readdir(d
)) != NULL
) {
1414 if (!rpc_validate_sid(e
->d_name
))
1417 snprintf(path
, sizeof(path
) - 1,
1418 RPC_SESSION_DIRECTORY
"/%s", e
->d_name
);
1420 attr
= rpc_blob_from_file(path
);
1423 rpc_session_from_blob(uci
, attr
);
1432 uci_free_context(uci
);