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Diffstat (limited to 'src/reclaim/plugin_reclaim_attestation_jwt.c')
-rw-r--r-- | src/reclaim/plugin_reclaim_attestation_jwt.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/reclaim/plugin_reclaim_attestation_jwt.c b/src/reclaim/plugin_reclaim_attestation_jwt.c new file mode 100644 index 000000000..8a67b18cd --- /dev/null +++ b/src/reclaim/plugin_reclaim_attestation_jwt.c | |||
@@ -0,0 +1,233 @@ | |||
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 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file reclaim-attribute/plugin_reclaim_attestation_gnuid.c | ||
23 | * @brief reclaim-attribute-plugin-gnuid attribute plugin to provide the API for | ||
24 | * fundamental | ||
25 | * attribute types. | ||
26 | * | ||
27 | * @author Martin Schanzenbach | ||
28 | */ | ||
29 | #include "platform.h" | ||
30 | #include "gnunet_util_lib.h" | ||
31 | #include "gnunet_reclaim_plugin.h" | ||
32 | #include <inttypes.h> | ||
33 | #include <jansson.h> | ||
34 | |||
35 | /** | ||
36 | * Convert the 'value' of an attestation to a string. | ||
37 | * | ||
38 | * @param cls closure, unused | ||
39 | * @param type type of the attestation | ||
40 | * @param data value in binary encoding | ||
41 | * @param data_size number of bytes in @a data | ||
42 | * @return NULL on error, otherwise human-readable representation of the value | ||
43 | */ | ||
44 | static char * | ||
45 | jwt_value_to_string (void *cls, | ||
46 | uint32_t type, | ||
47 | const void *data, | ||
48 | size_t data_size) | ||
49 | { | ||
50 | switch (type) | ||
51 | { | ||
52 | case GNUNET_RECLAIM_ATTESTATION_TYPE_JWT: | ||
53 | return GNUNET_strndup (data, data_size); | ||
54 | |||
55 | default: | ||
56 | return NULL; | ||
57 | } | ||
58 | } | ||
59 | |||
60 | |||
61 | /** | ||
62 | * Convert human-readable version of a 'value' of an attestation to the binary | ||
63 | * representation. | ||
64 | * | ||
65 | * @param cls closure, unused | ||
66 | * @param type type of the attestation | ||
67 | * @param s human-readable string | ||
68 | * @param data set to value in binary encoding (will be allocated) | ||
69 | * @param data_size set to number of bytes in @a data | ||
70 | * @return #GNUNET_OK on success | ||
71 | */ | ||
72 | static int | ||
73 | jwt_string_to_value (void *cls, | ||
74 | uint32_t type, | ||
75 | const char *s, | ||
76 | void **data, | ||
77 | size_t *data_size) | ||
78 | { | ||
79 | if (NULL == s) | ||
80 | return GNUNET_SYSERR; | ||
81 | switch (type) | ||
82 | { | ||
83 | case GNUNET_RECLAIM_ATTESTATION_TYPE_JWT: | ||
84 | *data = GNUNET_strdup (s); | ||
85 | *data_size = strlen (s); | ||
86 | return GNUNET_OK; | ||
87 | |||
88 | default: | ||
89 | return GNUNET_SYSERR; | ||
90 | } | ||
91 | } | ||
92 | |||
93 | |||
94 | /** | ||
95 | * Mapping of attestation type numbers to human-readable | ||
96 | * attestation type names. | ||
97 | */ | ||
98 | static struct | ||
99 | { | ||
100 | const char *name; | ||
101 | uint32_t number; | ||
102 | } jwt_attest_name_map[] = { { "JWT", GNUNET_RECLAIM_ATTESTATION_TYPE_JWT }, | ||
103 | { NULL, UINT32_MAX } }; | ||
104 | |||
105 | /** | ||
106 | * Convert a type name to the corresponding number. | ||
107 | * | ||
108 | * @param cls closure, unused | ||
109 | * @param jwt_typename name to convert | ||
110 | * @return corresponding number, UINT32_MAX on error | ||
111 | */ | ||
112 | static uint32_t | ||
113 | jwt_typename_to_number (void *cls, const char *jwt_typename) | ||
114 | { | ||
115 | unsigned int i; | ||
116 | |||
117 | i = 0; | ||
118 | while ((NULL != jwt_attest_name_map[i].name) && | ||
119 | (0 != strcasecmp (jwt_typename, jwt_attest_name_map[i].name))) | ||
120 | i++; | ||
121 | return jwt_attest_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 | jwt_number_to_typename (void *cls, uint32_t type) | ||
134 | { | ||
135 | unsigned int i; | ||
136 | |||
137 | i = 0; | ||
138 | while ((NULL != jwt_attest_name_map[i].name) && (type != | ||
139 | jwt_attest_name_map[i]. | ||
140 | number)) | ||
141 | i++; | ||
142 | return jwt_attest_name_map[i].name; | ||
143 | } | ||
144 | |||
145 | /** | ||
146 | * Parse a JWT and return the respective claim value as Attribute | ||
147 | * | ||
148 | * @param attest the jwt attestation | ||
149 | * @param claim the name of the claim in the JWT | ||
150 | * | ||
151 | * @return a GNUNET_RECLAIM_Attribute, containing the new value | ||
152 | */ | ||
153 | struct GNUNET_RECLAIM_AttributeList * | ||
154 | jwt_parse_attributes (void *cls, | ||
155 | const struct GNUNET_RECLAIM_Attestation *attest) | ||
156 | { | ||
157 | char *jwt_string; | ||
158 | struct GNUNET_RECLAIM_AttributeList *attrs; | ||
159 | char delim[] = "."; | ||
160 | char *val_str = NULL; | ||
161 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Parsing JWT attributes.\n"); | ||
162 | char *decoded_jwt; | ||
163 | json_t *json_val; | ||
164 | json_error_t *json_err = NULL; | ||
165 | |||
166 | if (GNUNET_RECLAIM_ATTESTATION_TYPE_JWT != attest->type) | ||
167 | return NULL; | ||
168 | attrs = GNUNET_new (struct GNUNET_RECLAIM_AttributeList); | ||
169 | |||
170 | jwt_string = GNUNET_strdup (attest->data); | ||
171 | const char *jwt_body = strtok (jwt_string, delim); | ||
172 | jwt_body = strtok (NULL, delim); | ||
173 | GNUNET_STRINGS_base64_decode (jwt_body, strlen (jwt_body), | ||
174 | (void **) &decoded_jwt); | ||
175 | json_val = json_loads (decoded_jwt, JSON_DECODE_ANY, json_err); | ||
176 | const char *key; | ||
177 | json_t *value; | ||
178 | json_object_foreach (json_val, key, value) { | ||
179 | val_str = json_dumps (value, JSON_ENCODE_ANY); | ||
180 | GNUNET_RECLAIM_attribute_list_add (attrs, | ||
181 | key, | ||
182 | NULL, | ||
183 | GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING,//FIXME | ||
184 | val_str, | ||
185 | strlen (val_str)); | ||
186 | GNUNET_free (val_str); | ||
187 | } | ||
188 | GNUNET_free (jwt_string); | ||
189 | //FIXME needed?? | ||
190 | return attrs; | ||
191 | } | ||
192 | |||
193 | |||
194 | |||
195 | |||
196 | /** | ||
197 | * Entry point for the plugin. | ||
198 | * | ||
199 | * @param cls NULL | ||
200 | * @return the exported block API | ||
201 | */ | ||
202 | void * | ||
203 | libgnunet_plugin_reclaim_attestation_jwt_init (void *cls) | ||
204 | { | ||
205 | struct GNUNET_RECLAIM_AttestationPluginFunctions *api; | ||
206 | |||
207 | api = GNUNET_new (struct GNUNET_RECLAIM_AttestationPluginFunctions); | ||
208 | api->value_to_string = &jwt_value_to_string; | ||
209 | api->string_to_value = &jwt_string_to_value; | ||
210 | api->typename_to_number = &jwt_typename_to_number; | ||
211 | api->number_to_typename = &jwt_number_to_typename; | ||
212 | api->get_attributes = &jwt_parse_attributes; | ||
213 | return api; | ||
214 | } | ||
215 | |||
216 | |||
217 | /** | ||
218 | * Exit point from the plugin. | ||
219 | * | ||
220 | * @param cls the return value from #libgnunet_plugin_block_test_init() | ||
221 | * @return NULL | ||
222 | */ | ||
223 | void * | ||
224 | libgnunet_plugin_reclaim_attestation_jwt_done (void *cls) | ||
225 | { | ||
226 | struct GNUNET_RECLAIM_AttestationPluginFunctions *api = cls; | ||
227 | |||
228 | GNUNET_free (api); | ||
229 | return NULL; | ||
230 | } | ||
231 | |||
232 | |||
233 | /* end of plugin_reclaim_attestation_type_gnuid.c */ | ||