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1 | /* |
2 | * Copyright (c) 2014 Ian Sutton <ian@kremlin.cc> |
3 | * |
4 | * Permission to use, copy, modify, and distribute this software for any |
5 | * purpose with or without fee is hereby granted, provided that the above |
6 | * copyright notice and this permission notice appear in all copies. |
7 | * |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
15 | */ |
16 | |
17 | #include <unistd.h> |
18 | #include <limits.h> |
19 | #include <string.h> |
20 | |
21 | #include <glib/gprintf.h> |
22 | #include <glib-unix.h> |
23 | #include <polkit/polkit.h> |
24 | |
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25 | #include "util.h" |
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26 | |
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27 | static gboolean is_valid_action(GList *action_list, const gchar *action) { |
28 | |
29 | PolkitActionDescription *action_descr; |
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30 | const gchar *action_descr_id; |
31 | GList *cur; |
32 | gboolean ret; |
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33 | |
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34 | ret = FALSE; |
35 | cur = g_list_first(action_list); |
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36 | |
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37 | while(cur && (action_descr = ((PolkitActionDescription *)(cur->data))) && (action_descr_id = polkit_action_description_get_action_id(action_descr))) { |
38 | |
39 | if(!g_strcmp0(action, action_descr_id)) { |
40 | ret = TRUE; |
41 | break; |
42 | } |
43 | |
44 | cur = cur->next; |
45 | } |
46 | |
47 | g_list_free(action_list); |
48 | |
49 | return ret; |
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50 | } |
51 | |
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52 | check_auth_result polkit_try_auth(const gchar *bus, const gchar *action, gboolean prompt) { |
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53 | |
54 | GList *valid_actions; |
55 | PolkitAuthority *auth; |
56 | PolkitSubject *subj; |
57 | PolkitAuthorizationResult *result; |
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58 | PolkitCheckAuthorizationFlags prompt_flag; |
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59 | gboolean authorized, challenge; |
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60 | |
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61 | auth = NULL; |
62 | subj = NULL; |
63 | result = NULL; |
64 | valid_actions = NULL; |
65 | authorized = challenge = FALSE; |
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66 | prompt_flag = prompt ? POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION : POLKIT_CHECK_AUTHORIZATION_FLAGS_NONE; |
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67 | |
68 | auth = polkit_authority_get_sync(NULL, NULL); /* TODO timeout for this */ |
69 | subj = polkit_system_bus_name_new(bus); |
70 | valid_actions = polkit_authority_enumerate_actions_sync(auth, NULL, NULL); |
71 | |
72 | if(!auth || !valid_actions) |
73 | return ERROR_GENERIC; /* extremely unlikely */ |
74 | else if(!subj) |
75 | return ERROR_BADBUS; |
76 | else if(!is_valid_action(valid_actions, action)) |
77 | return ERROR_BADACTION; |
78 | |
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79 | if(!(result = polkit_authority_check_authorization_sync(auth, subj, action, NULL, prompt_flag, NULL, NULL))) |
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80 | return ERROR_GENERIC; /* TODO pass, check gerror and return more relevant error */ |
81 | |
82 | authorized = polkit_authorization_result_get_is_authorized(result); |
83 | challenge = polkit_authorization_result_get_is_challenge(result); |
84 | |
85 | /* free()'s before return */ |
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86 | if(auth) |
87 | g_object_unref(auth); |
88 | if(subj) |
89 | g_object_unref(subj); |
90 | if(result) |
91 | g_object_unref(result); |
92 | |
93 | if(authorized) { |
94 | |
95 | if(challenge) |
96 | return AUTHORIZED_BY_PROMPT; |
97 | |
98 | return AUTHORIZED_NATIVELY; |
99 | |
100 | } else if(challenge) |
101 | return UNAUTHORIZED_FAILED_PROMPT; |
102 | |
103 | return UNAUTHORIZED_NATIVELY; |
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104 | } |