diff options
Diffstat (limited to 'src/zklaim/plugin_reclaim_attribute_zklaim.c')
-rw-r--r-- | src/zklaim/plugin_reclaim_attribute_zklaim.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/zklaim/plugin_reclaim_attribute_zklaim.c b/src/zklaim/plugin_reclaim_attribute_zklaim.c new file mode 100644 index 000000000..a79576cb1 --- /dev/null +++ b/src/zklaim/plugin_reclaim_attribute_zklaim.c | |||
@@ -0,0 +1,181 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | Copyright (C) 2013, 2014, 2016 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | */ | ||
18 | |||
19 | /** | ||
20 | * @file zklaim/plugin_reclaim_attribute_zklaim.c | ||
21 | * @brief identity attribute plugin to provide the API for ZKlaims | ||
22 | * | ||
23 | * @author Martin Schanzenbach | ||
24 | */ | ||
25 | #include "platform.h" | ||
26 | #include "gnunet_util_lib.h" | ||
27 | #include "gnunet_reclaim_attribute_plugin.h" | ||
28 | #include <inttypes.h> | ||
29 | |||
30 | |||
31 | /** | ||
32 | * Convert the 'value' of an attribute to a string. | ||
33 | * | ||
34 | * @param cls closure, unused | ||
35 | * @param type type of the attribute | ||
36 | * @param data value in binary encoding | ||
37 | * @param data_size number of bytes in @a data | ||
38 | * @return NULL on error, otherwise human-readable representation of the value | ||
39 | */ | ||
40 | static char * | ||
41 | zklaim_value_to_string (void *cls, | ||
42 | uint32_t type, | ||
43 | const void *data, | ||
44 | size_t data_size) | ||
45 | { | ||
46 | |||
47 | switch (type) | ||
48 | { | ||
49 | case GNUNET_RECLAIM_ATTRIBUTE_TYPE_ZKLAIM: | ||
50 | return GNUNET_strndup (data, data_size); | ||
51 | default: | ||
52 | return NULL; | ||
53 | } | ||
54 | } | ||
55 | |||
56 | |||
57 | /** | ||
58 | * Convert human-readable version of a 'value' of an attribute to the binary | ||
59 | * representation. | ||
60 | * | ||
61 | * @param cls closure, unused | ||
62 | * @param type type of the attribute | ||
63 | * @param s human-readable string | ||
64 | * @param data set to value in binary encoding (will be allocated) | ||
65 | * @param data_size set to number of bytes in @a data | ||
66 | * @return #GNUNET_OK on success | ||
67 | */ | ||
68 | static int | ||
69 | zklaim_string_to_value (void *cls, | ||
70 | uint32_t type, | ||
71 | const char *s, | ||
72 | void **data, | ||
73 | size_t *data_size) | ||
74 | { | ||
75 | if (NULL == s) | ||
76 | return GNUNET_SYSERR; | ||
77 | switch (type) | ||
78 | { | ||
79 | |||
80 | case GNUNET_RECLAIM_ATTRIBUTE_TYPE_ZKLAIM: | ||
81 | *data = GNUNET_strdup (s); | ||
82 | *data_size = strlen (s); | ||
83 | return GNUNET_OK; | ||
84 | default: | ||
85 | return GNUNET_SYSERR; | ||
86 | } | ||
87 | } | ||
88 | |||
89 | |||
90 | /** | ||
91 | * Mapping of attribute type numbers to human-readable | ||
92 | * attribute type names. | ||
93 | */ | ||
94 | static struct { | ||
95 | const char *name; | ||
96 | uint32_t number; | ||
97 | } zklaim_name_map[] = { | ||
98 | { "ZKLAIM", GNUNET_RECLAIM_ATTRIBUTE_TYPE_ZKLAIM }, | ||
99 | { NULL, UINT32_MAX } | ||
100 | }; | ||
101 | |||
102 | |||
103 | /** | ||
104 | * Convert a type name to the corresponding number. | ||
105 | * | ||
106 | * @param cls closure, unused | ||
107 | * @param zklaim_typename name to convert | ||
108 | * @return corresponding number, UINT32_MAX on error | ||
109 | */ | ||
110 | static uint32_t | ||
111 | zklaim_typename_to_number (void *cls, | ||
112 | const char *zklaim_typename) | ||
113 | { | ||
114 | unsigned int i; | ||
115 | |||
116 | i=0; | ||
117 | while ( (NULL != zklaim_name_map[i].name) && | ||
118 | (0 != strcasecmp (zklaim_typename, | ||
119 | zklaim_name_map[i].name)) ) | ||
120 | i++; | ||
121 | return zklaim_name_map[i].number; | ||
122 | } | ||
123 | |||
124 | |||
125 | /** | ||
126 | * Convert a type number (i.e. 1) to the corresponding type string | ||
127 | * | ||
128 | * @param cls closure, unused | ||
129 | * @param type number of a type to convert | ||
130 | * @return corresponding typestring, NULL on error | ||
131 | */ | ||
132 | static const char * | ||
133 | zklaim_number_to_typename (void *cls, | ||
134 | uint32_t type) | ||
135 | { | ||
136 | unsigned int i; | ||
137 | |||
138 | i=0; | ||
139 | while ( (NULL != zklaim_name_map[i].name) && | ||
140 | (type != zklaim_name_map[i].number) ) | ||
141 | i++; | ||
142 | return zklaim_name_map[i].name; | ||
143 | } | ||
144 | |||
145 | |||
146 | /** | ||
147 | * Entry point for the plugin. | ||
148 | * | ||
149 | * @param cls NULL | ||
150 | * @return the exported block API | ||
151 | */ | ||
152 | void * | ||
153 | libgnunet_plugin_reclaim_attribute_zklaim_init (void *cls) | ||
154 | { | ||
155 | struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api; | ||
156 | |||
157 | api = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions); | ||
158 | api->value_to_string = &zklaim_value_to_string; | ||
159 | api->string_to_value = &zklaim_string_to_value; | ||
160 | api->typename_to_number = &zklaim_typename_to_number; | ||
161 | api->number_to_typename = &zklaim_number_to_typename; | ||
162 | return api; | ||
163 | } | ||
164 | |||
165 | |||
166 | /** | ||
167 | * Exit point from the plugin. | ||
168 | * | ||
169 | * @param cls the return value from #libgnunet_plugin_block_test_init() | ||
170 | * @return NULL | ||
171 | */ | ||
172 | void * | ||
173 | libgnunet_plugin_reclaim_attribute_zklaim_done (void *cls) | ||
174 | { | ||
175 | struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api = cls; | ||
176 | |||
177 | GNUNET_free (api); | ||
178 | return NULL; | ||
179 | } | ||
180 | |||
181 | /* end of plugin_reclaim_attribute_type_zklaim.c */ | ||