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- /*
- 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/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @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);
- GNUNET_break (NULL != json);
- 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;
- GNUNET_assert (GNUNET_OK ==
- GNUNET_TIME_round_abs (&stamp));
- j = json_object ();
- if (NULL == j)
- {
- GNUNET_break (0);
- return NULL;
- }
- if (stamp.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
- {
- if (0 !=
- json_object_set_new (j,
- "t_ms",
- json_string ("never")))
- {
- GNUNET_break (0);
- json_decref (j);
- return NULL;
- }
- return j;
- }
- if (0 !=
- json_object_set_new (j,
- "t_ms",
- json_integer ((json_int_t) (stamp.abs_value_us
- / 1000LL))))
- {
- GNUNET_break (0);
- json_decref (j);
- return NULL;
- }
- 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;
- GNUNET_assert (GNUNET_OK ==
- GNUNET_TIME_round_rel (&stamp));
- j = json_object ();
- if (NULL == j)
- {
- GNUNET_break (0);
- return NULL;
- }
- if (stamp.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us)
- {
- if (0 !=
- json_object_set_new (j,
- "d_ms",
- json_string ("forever")))
- {
- GNUNET_break (0);
- json_decref (j);
- return NULL;
- }
- return j;
- }
- if (0 !=
- json_object_set_new (j,
- "d_ms",
- json_integer ((json_int_t) (stamp.rel_value_us
- / 1000LL))))
- {
- GNUNET_break (0);
- json_decref (j);
- return NULL;
- }
- 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)
- {
- void *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)
- {
- void *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_gnsrecord (const char*rname,
- const struct GNUNET_GNSRECORD_Data *rd,
- unsigned int rd_count)
- {
- struct GNUNET_TIME_Absolute abs_exp;
- struct GNUNET_TIME_Relative rel_exp;
- const char *expiration_time_str;
- const char *record_type_str;
- char *value_str;
- json_t *data;
- json_t *record;
- json_t *records;
- data = json_object ();
- if (NULL == data)
- {
- GNUNET_break (0);
- return NULL;
- }
- if (0 !=
- json_object_set_new (data,
- "record_name",
- json_string (rname)))
- {
- GNUNET_break (0);
- json_decref (data);
- return NULL;
- }
- records = json_array ();
- if (NULL == records)
- {
- GNUNET_break (0);
- json_decref (data);
- return NULL;
- }
- for (int i = 0; i < rd_count; i++)
- {
- value_str = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
- rd[i].data,
- rd[i].data_size);
- if (GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION & rd[i].flags)
- {
- rel_exp.rel_value_us = rd[i].expiration_time;
- expiration_time_str = GNUNET_STRINGS_relative_time_to_string (rel_exp,
- GNUNET_NO);
- } else {
- abs_exp.abs_value_us = rd[i].expiration_time;
- expiration_time_str = GNUNET_STRINGS_absolute_time_to_string (abs_exp);
- }
- record_type_str = GNUNET_GNSRECORD_number_to_typename (rd[i].record_type);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Packing %s %s %s %d\n",
- value_str, record_type_str, expiration_time_str, rd[i].flags);
- record = json_pack ("{s:s,s:s,s:s,s:b,s:b,s:b,s:b}",
- "value",
- value_str,
- "record_type",
- record_type_str,
- "expiration_time",
- expiration_time_str,
- "private",
- rd[i].flags & GNUNET_GNSRECORD_RF_PRIVATE,
- "relative_expiration",
- rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION,
- "supplemental",
- rd[i].flags & GNUNET_GNSRECORD_RF_SUPPLEMENTAL,
- "shadow",
- rd[i].flags & GNUNET_GNSRECORD_RF_SHADOW_RECORD);
- GNUNET_free (value_str);
- if (NULL == record)
- {
- GNUNET_break (0);
- json_decref (records);
- json_decref (data);
- return NULL;
- }
- if (0 !=
- json_array_append_new (records,
- record))
- {
- GNUNET_break (0);
- json_decref (records);
- json_decref (data);
- return NULL;
- }
- }
- if (0 !=
- json_object_set_new (data,
- "data",
- records))
- {
- GNUNET_break (0);
- json_decref (data);
- return NULL;
- }
- return data;
- }
- /* End of json/json_generator.c */
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