json_generator.c File Reference

helper functions for generating JSON from GNUnet data structures More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_json_lib.h"

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Functions
json_t *	GNUNET_JSON_from_data (const void *data, size_t size)
	Convert binary data to a JSON string with the base32crockford encoding. More...
json_t *	GNUNET_JSON_from_data64 (const void *data, size_t size)
	Convert binary data to a JSON string with base64 encoding. More...
json_t *	GNUNET_JSON_from_timestamp (struct GNUNET_TIME_Timestamp stamp)
	Convert timestamp to a json string. More...
json_t *	GNUNET_JSON_from_timestamp_nbo (struct GNUNET_TIME_TimestampNBO stamp)
	Convert timestamp to a json string. More...
json_t *	GNUNET_JSON_from_time_rel (struct GNUNET_TIME_Relative stamp)
	Convert relative timestamp to a json string. More...
json_t *	GNUNET_JSON_from_rsa_public_key (const struct GNUNET_CRYPTO_RsaPublicKey *pk)
	Convert RSA public key to JSON. More...
json_t *	GNUNET_JSON_from_rsa_signature (const struct GNUNET_CRYPTO_RsaSignature *sig)
	Convert RSA signature to JSON. More...

Detailed Description

helper functions for generating JSON from GNUnet data structures

Author

Sree Harsha Totakura sreeh.nosp@m.arsh.nosp@m.a@tot.nosp@m.akur.nosp@m.a.in

Definition in file json_generator.c.

Function Documentation

GNUNET_JSON_from_data()

json_t * GNUNET_JSON_from_data	(	const void *	data,
		size_t	size
	)

Convert binary data to a JSON string with the base32crockford encoding.

Parameters

data	binary data
size	size of data in bytes

Returns

json string that encodes data

Definition at line 31 of file json_generator.c.

{
  char *buf;
  json_t *json;
 
  if (size >= ( (GNUNET_MAX_MALLOC_CHECKED - 1) * 5) - 4 / 8)
  {
    GNUNET_break (0);
    return NULL;
  }
  buf = GNUNET_STRINGS_data_to_string_alloc (data,
                                             size);
  json = json_string (buf);
  GNUNET_free (buf);
  GNUNET_break (NULL != json);
  return json;
}

References data, GNUNET_break, GNUNET_free, GNUNET_MAX_MALLOC_CHECKED, GNUNET_STRINGS_data_to_string_alloc(), and size.

Referenced by GNUNET_JSON_from_rsa_public_key(), GNUNET_JSON_from_rsa_signature(), and GNUNET_JSON_pack_data_varsize().

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GNUNET_JSON_from_data64()

json_t * GNUNET_JSON_from_data64	(	const void *	data,
		size_t	size
	)

Convert binary data to a JSON string with base64 encoding.

Parameters

data	binary data
size	size of data in bytes

Returns

json string that encodes data

Definition at line 52 of file json_generator.c.

{
  char *buf = NULL;
  json_t *json;
  size_t len;
 
  if (size >= ( ( (GNUNET_MAX_MALLOC_CHECKED - 1) * 6) - 5) / 8)
  {
    GNUNET_break (0);
    return NULL;
  }
  len = GNUNET_STRINGS_base64_encode (data,
                                      size,
                                      &buf);
  if (NULL == buf)
  {
    GNUNET_break (0);
    return NULL;
  }
  json = json_stringn (buf,
                       len);
  GNUNET_free (buf);
  GNUNET_break (NULL != json);
  return json;
}

References data, GNUNET_break, GNUNET_free, GNUNET_MAX_MALLOC_CHECKED, GNUNET_STRINGS_base64_encode(), and size.

Referenced by GNUNET_JSON_pack_data64_varsize().

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GNUNET_JSON_from_timestamp()

json_t * GNUNET_JSON_from_timestamp

(

struct GNUNET_TIME_Timestamp

stamp

)

Convert timestamp to a json string.

Parameters

stamp

the time stamp

Returns

a json string with the timestamp in stamp

Definition at line 81 of file json_generator.c.

{
  json_t *j;
 
  j = json_object ();
  if (NULL == j)
  {
    GNUNET_break (0);
    return NULL;
  }
  if (GNUNET_TIME_absolute_is_never (stamp.abs_time))
  {
    if (0 !=
        json_object_set_new (j,
                             "t_s",
                             json_string ("never")))
    {
      GNUNET_break (0);
      json_decref (j);
      return NULL;
    }
    return j;
  }
  GNUNET_assert (
    0 ==
    (stamp.abs_time.abs_value_us
     % GNUNET_TIME_UNIT_SECONDS.rel_value_us));
  if (0 !=
      json_object_set_new (
        j,
        "t_s",
        json_integer (
          (json_int_t) (stamp.abs_time.abs_value_us
                        / GNUNET_TIME_UNIT_SECONDS.rel_value_us))))
  {
    GNUNET_break (0);
    json_decref (j);
    return NULL;
  }
  return j;
}

References GNUNET_TIME_Timestamp::abs_time, GNUNET_TIME_Absolute::abs_value_us, GNUNET_assert, GNUNET_break, GNUNET_TIME_absolute_is_never(), and GNUNET_TIME_UNIT_SECONDS.

Referenced by GNUNET_JSON_from_timestamp_nbo(), and GNUNET_JSON_pack_timestamp().

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GNUNET_JSON_from_timestamp_nbo()

json_t * GNUNET_JSON_from_timestamp_nbo

(

struct GNUNET_TIME_TimestampNBO

stamp

)

Convert timestamp to a json string.

Parameters

stamp

the time stamp

Returns

a json string with the timestamp in stamp

Definition at line 125 of file json_generator.c.

{
  return GNUNET_JSON_from_timestamp (GNUNET_TIME_timestamp_ntoh (stamp));
}

References GNUNET_JSON_from_timestamp(), and GNUNET_TIME_timestamp_ntoh().

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GNUNET_JSON_from_time_rel()

json_t * GNUNET_JSON_from_time_rel

(

struct GNUNET_TIME_Relative

stamp

)

Convert relative timestamp to a json string.

Parameters

stamp

the time stamp

Returns

a json string with the timestamp in stamp

Definition at line 132 of file json_generator.c.

{
  json_t *j;
 
  j = json_object ();
  if (NULL == j)
  {
    GNUNET_break (0);
    return NULL;
  }
  if (GNUNET_TIME_relative_is_forever (stamp))
  {
    if (0 !=
        json_object_set_new (j,
                             "d_us",
                             json_string ("forever")))
    {
      GNUNET_break (0);
      json_decref (j);
      return NULL;
    }
    return j;
  }
  if (stamp.rel_value_us >= (1LLU << 53))
  {
    /* value is larger than allowed */
    GNUNET_break (0);
    return NULL;
  }
  if (0 !=
      json_object_set_new (
        j,
        "d_us",
        json_integer ((json_int_t) stamp.rel_value_us)))
  {
    GNUNET_break (0);
    json_decref (j);
    return NULL;
  }
  return j;
}

References GNUNET_break, GNUNET_TIME_relative_is_forever(), and GNUNET_TIME_Relative::rel_value_us.

Referenced by GNUNET_JSON_pack_time_rel().

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GNUNET_JSON_from_rsa_public_key()

json_t * GNUNET_JSON_from_rsa_public_key

(

const struct GNUNET_CRYPTO_RsaPublicKey *

pk

)

Convert RSA public key to JSON.

Parameters

pk	public key to convert

Returns

corresponding JSON encoding

Definition at line 176 of file json_generator.c.

{
  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;
}

References GNUNET_CRYPTO_rsa_public_key_encode(), GNUNET_free, GNUNET_JSON_from_data(), pk, and ret.

Referenced by GNUNET_JSON_pack_rsa_public_key().

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GNUNET_JSON_from_rsa_signature()

json_t * GNUNET_JSON_from_rsa_signature

(

const struct GNUNET_CRYPTO_RsaSignature *

sig

)

Convert RSA signature to JSON.

Parameters

sig	signature to convert

Returns

corresponding JSON encoding

Definition at line 192 of file json_generator.c.

{
  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;
}

References GNUNET_CRYPTO_rsa_signature_encode(), GNUNET_free, GNUNET_JSON_from_data(), and ret.

Referenced by GNUNET_JSON_pack_rsa_signature().

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