aboutsummaryrefslogtreecommitdiff
path: root/src/json/json_generator.c
blob: 96f07bdc2373ae457acda627a6e1e04c6acb1857 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
/*
  This file is part of GNUnet
  Copyright (C) 2014, 2015, 2016 GNUnet e.V.

  GNUnet is free software: you can redistribute it and/or modify it
  under the terms of the GNU Affero General Public License as published
  by the Free Software Foundation, either version 3 of the License,
  or (at your option) any later version.

  GNUnet is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Affero General Public License for more details.
 
  You should have received a copy of the GNU Affero General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file json/json_generator.c
 * @brief helper functions for generating JSON from GNUnet data structures
 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_json_lib.h"


/**
 * Convert binary data to a JSON string
 * with the base32crockford encoding.
 *
 * @param data binary data
 * @param size size of @a data in bytes
 * @return json string that encodes @a data
 */
json_t *
GNUNET_JSON_from_data (const void *data,
                       size_t size)
{
  char *buf;
  json_t *json;

  buf = GNUNET_STRINGS_data_to_string_alloc (data, size);
  json = json_string (buf);
  GNUNET_free (buf);
  return json;
}


/**
 * Convert absolute timestamp to a json string.
 *
 * @param stamp the time stamp
 * @return a json string with the timestamp in @a stamp
 */
json_t *
GNUNET_JSON_from_time_abs (struct GNUNET_TIME_Absolute stamp)
{
  json_t *j;
  char *mystr;
  int ret;

  GNUNET_assert (GNUNET_OK ==
                 GNUNET_TIME_round_abs (&stamp));
  if (stamp.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
    return json_string ("/never/");
  ret = GNUNET_asprintf (&mystr,
                         "/Date(%llu)/",
                         (unsigned long long) (stamp.abs_value_us / (1000LL * 1000LL)));
  GNUNET_assert (ret > 0);
  j = json_string (mystr);
  GNUNET_free (mystr);
  return j;
}


/**
 * Convert absolute timestamp to a json string.
 *
 * @param stamp the time stamp
 * @return a json string with the timestamp in @a stamp
 */
json_t *
GNUNET_JSON_from_time_abs_nbo (struct GNUNET_TIME_AbsoluteNBO stamp)
{
  return GNUNET_JSON_from_time_abs (GNUNET_TIME_absolute_ntoh (stamp));
}


/**
 * Convert relative timestamp to a json string.
 *
 * @param stamp the time stamp
 * @return a json string with the timestamp in @a stamp
 */
json_t *
GNUNET_JSON_from_time_rel (struct GNUNET_TIME_Relative stamp)
{
  json_t *j;
  char *mystr;
  int ret;

  GNUNET_assert (GNUNET_OK ==
                 GNUNET_TIME_round_rel (&stamp));
  if (stamp.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us)
    return json_string ("/forever/");
  ret = GNUNET_asprintf (&mystr,
                         "/Delay(%llu)/",
                         (unsigned long long) (stamp.rel_value_us / (1000LL * 1000LL)));
  GNUNET_assert (ret > 0);
  j = json_string (mystr);
  GNUNET_free (mystr);
  return j;
}


/**
 * Convert RSA public key to JSON.
 *
 * @param pk public key to convert
 * @return corresponding JSON encoding
 */
json_t *
GNUNET_JSON_from_rsa_public_key (const struct GNUNET_CRYPTO_RsaPublicKey *pk)
{
  char *buf;
  size_t buf_len;
  json_t *ret;

  buf_len = GNUNET_CRYPTO_rsa_public_key_encode (pk,
                                                 &buf);
  ret = GNUNET_JSON_from_data (buf,
                               buf_len);
  GNUNET_free (buf);
  return ret;
}


/**
 * Convert RSA signature to JSON.
 *
 * @param sig signature to convert
 * @return corresponding JSON encoding
 */
json_t *
GNUNET_JSON_from_rsa_signature (const struct GNUNET_CRYPTO_RsaSignature *sig)
{
  char *buf;
  size_t buf_len;
  json_t *ret;

  buf_len = GNUNET_CRYPTO_rsa_signature_encode (sig,
                                                &buf);
  ret = GNUNET_JSON_from_data (buf,
                               buf_len);
  GNUNET_free (buf);
  return ret;
}

/**
 * Convert Gns record to JSON.
 *
 * @param rname name of record
 * @param rd record data
 * @return corresponding JSON encoding
 */
json_t *
GNUNET_JSON_from_gns_record (const char* rname,
			     const struct GNUNET_GNSRECORD_Data *rd)
{
  struct GNUNET_TIME_Absolute expiration_time;
  const char *expiration_time_str;
  const char *record_type_str;
  char *value_str;
  json_t *ret;
  int flags;

  value_str = GNUNET_GNSRECORD_value_to_string(rd->record_type,rd->data,rd->data_size);
  expiration_time = GNUNET_GNSRECORD_record_get_expiration_time(1, rd);
  expiration_time_str = GNUNET_STRINGS_absolute_time_to_string(expiration_time);
  flags = (int)rd->flags; //maybe necessary
  record_type_str = GNUNET_GNSRECORD_number_to_typename(rd->record_type);

  // ? for possible NULL values
  if (NULL != rname)
  {
    ret = json_pack ("{s:s?,s:s?,s:s?,s:i,s:s?}",
		     "value",
		     value_str,
		     "record_type",
		     record_type_str,
		     "expiration_time",
		     expiration_time_str,
		     "flag",
		     flags,
		     "record_name",
		     rname);
  }
  else
  {
    ret = json_pack ("{s:s?,s:s?,s:s?,s:i}",
		     "value",
		     value_str,
		     "record_type",
		     record_type_str,
		     "expiration_time",
		     expiration_time_str,
		     "flag",
		     flags);
  }
  GNUNET_free_non_null(value_str);
  return ret;
}


/* End of json/json_generator.c */