171 lines
4.4 KiB
C
171 lines
4.4 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014, 2015 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file include/taler_json_lib.h
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* @brief helper functions for JSON processing using libjansson
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* @author Sree Harsha Totakura <sreeharsha@totakura.in>
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*/
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#ifndef TALER_json_LIB_H_
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#define TALER_json_LIB_H_
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#include <jansson.h>
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/**
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* Print JSON parsing related error information
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*/
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#define TALER_json_warn(error) \
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GNUNET_log (GNUNET_ERROR_TYPE_WARNING, \
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"JSON parsing failed at %s:%u: %s (%s)\n", \
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__FILE__, __LINE__, error.text, error.source)
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/**
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* Convert a TALER amount to a JSON object.
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*
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* @param amount the amount
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* @return a json object describing the amount
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*/
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json_t *
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TALER_json_from_amount (const struct TALER_Amount *amount);
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/**
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* Convert absolute timestamp to a json string.
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*
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* @param stamp the time stamp
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* @return a json string with the timestamp in @a stamp
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*/
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json_t *
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TALER_json_from_abs (struct GNUNET_TIME_Absolute stamp);
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/**
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* Convert RSA public key to JSON.
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*
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* @param pk public key to convert
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* @return corresponding JSON encoding
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*/
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json_t *
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TALER_json_from_rsa_public_key (struct GNUNET_CRYPTO_rsa_PublicKey *pk);
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/**
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* Convert RSA signature to JSON.
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*
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* @param sig signature to convert
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* @return corresponding JSON encoding
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*/
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json_t *
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TALER_json_from_rsa_signature (struct GNUNET_CRYPTO_rsa_Signature *sig);
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/**
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* Convert binary data to a JSON string
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* with the base32crockford encoding.
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*
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* @param data binary data
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* @param size size of @a data in bytes
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* @return json string that encodes @a data
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*/
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json_t *
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TALER_json_from_data (const void *data,
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size_t size);
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/**
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* Parse given JSON object to Amount
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*
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* @param json the json object representing Amount
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* @param[out] r_amount where the amount has to be written
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* @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
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*/
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int
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TALER_json_to_amount (json_t *json,
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struct TALER_Amount *r_amount);
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/**
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* Parse given JSON object to absolute time.
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*
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* @param json the json object representing absolute time in seconds
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* @param[out] abs where the time has to be written
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* @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
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*/
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int
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TALER_json_to_abs (json_t *json,
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struct GNUNET_TIME_Absolute *abs);
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/**
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* Parse given JSON object to data
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*
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* @param json the json object representing data
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* @param out the pointer to hold the parsed data.
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* @param out_size the size of @a out
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* @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
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*/
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int
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TALER_json_to_data (json_t *json,
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void *out,
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size_t out_size);
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/**
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* Convert JSON to RSA public key.
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*
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* @param json JSON encoding to convert
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* @return corresponding public key
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*/
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struct GNUNET_CRYPTO_rsa_PublicKey *
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TALER_json_to_rsa_public_key (json_t *json);
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/**
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* Convert JSON to RSA signature.
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*
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* @param json JSON encoding to convert
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* @return corresponding signature
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*/
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struct GNUNET_CRYPTO_rsa_Signature *
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TALER_json_to_rsa_signature (json_t *json);
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/**
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* Hash a JSON for binary signing.
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*
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* @param[in] json some JSON value to hash
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* @param[out] hc resulting hash code
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
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*/
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int
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TALER_hash_json (json_t *json,
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struct GNUNET_HashCode *hc);
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/**
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* Check if the given wire format JSON object is correctly formatted
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*
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* @param allowed NULL-terminated array of allowed wire format types
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* @param wire the JSON wire format object
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* @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
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*/
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int
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TALER_json_validate_wireformat (const char **allowed,
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const json_t *wire);
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#endif /* TALER_json_LIB_H_ */
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/* End of taler_json_lib.h */
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